CN114427347A

CN114427347A - Underground yield increasing pup joint, oil and gas drilling yield increasing combined operation system and method

Info

Publication number: CN114427347A
Application number: CN202010946449.2A
Authority: CN
Inventors: 耿黎东; 王敏生; 叶海超; 蒋海军; 光新军
Original assignee: China Petroleum and Chemical Corp; Sinopec Research Institute of Petroleum Engineering
Current assignee: China Petroleum and Chemical Corp; Sinopec Research Institute of Petroleum Engineering
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2022-05-03

Abstract

The invention discloses an underground production increasing pup joint, an oil and gas drilling production increasing combined system and a method. The technology of the invention can improve the drilling efficiency and the reliability of the drilling production increase combined operation.

Description

Underground yield increasing pup joint, oil and gas drilling yield increasing combined operation system and method

Technical Field

The invention belongs to the technical field of oil and gas exploration, and particularly relates to an underground yield increasing pup joint, an oil and gas drilling yield increasing combined operation system and an oil and gas drilling yield increasing combined operation method.

Background

The low-grade resource reserves mainly with low permeability in China are rich, account for more than 45 percent, and are the key fields and directions of the current oil-gas exploration and development. Compared with medium-high permeability oil and gas reservoirs, low-permeability and ultra-low permeability oil and gas reservoirs have the characteristics of narrow pore roar, poor connectivity, low permeability and the like, and economic and effective development is difficult.

At present, the development of low-permeability and ultra-low-permeability oil and gas reservoirs generally adopts a mode of combining horizontal well drilling and staged fracturing, but still has the problems of low recovery rate and single well productivity, poor economic benefit, high development cost and the like. At present, low-permeability oil and gas exploration and development gradually develops towards a deep layer, rock cementation is compact, stratum drillability is poor, well collapse, well leakage, stuck drilling and other underground accidents are easy to occur in a drilling process, drilling is frequently started, and the drilling period is long and the cost is high. In addition, low-permeability and ultra-low-permeability reservoirs have poor physical properties, strong heterogeneity, low reservoir drilling rate (the percentage of the number of wells in the oil (gas) layer to be drilled to the total number of wells in a statistical area), high difficulty in using, economic benefits can be obtained only by taking out a pipe column after drilling a horizontal well, then putting in a well completion pipe column and performing staged fracturing, the construction process is complex, and the well construction period is long.

The continuous pipe micro-well drilling technology has the advantages of small well bore size, low power of drilling equipment, no need of single joint connection, low requirement on ground conditions, capability of performing uninterrupted drilling operation, low operation cost, high operation efficiency, wide trial range, easiness in technical integration and the like, and is an important means for reducing the development cost, improving the development efficiency and changing the development mode. At present, a coiled tubing electric drilling machine and matched equipment are gradually improved, the quality of coiled tubing is continuously improved, a coiled tubing downhole drilling tool combination is formed, the measurement and control while drilling technology is rapidly developed, and a foundation is provided for a coiled tubing micro-well electric drilling technology.

When aiming at the low permeability hydrocarbon reservoir exploration and development among the prior art, in order to reach the purpose of increasing production, be provided with the increase production nipple joint in the pit in the rear end of drill bit, the structure of this increase production nipple joint in the pit is as shown in figure 1, figure 1 is prior art's increase production nipple joint in the pit structure sketch map, as shown in figure 1, this increase production nipple joint in the pit includes casing 1 and sets up the passageway switching valve body 2 in

casing

1, 2 bodies of passageway switching valve can move along axial direction in casing 1. Further, the passage switching valve body 2 has an axial hydraulic passage 21 extending in the axial direction and a radial hydraulic passage 22 extending in the radial direction. The shell 1 is provided with radial jet channels 11 corresponding to the radial hydraulic channels 22, and radial jet nozzles 12 are arranged at the outer ends of the radial jet channels 11. The housing 1 is further provided with a drilling hydraulic channel 13, the drilling hydraulic channel 13 being capable of communicating with the axial hydraulic channel 21. The underground cutting short section is connected with an underground power drilling tool, and the ground control system is in communication connection with the underground cutting short section; in the drilling process, the radial hydraulic channel 22 and the radial jet flow nozzle 12 are staggered, the radial hydraulic channel 22 is closed, and at the moment, the axial hydraulic channel 21 is communicated with the drilling hydraulic channel 13, namely the drilling hydraulic channel 13 is opened; when the production increasing operation is required, an instruction is sent out by a ground control system, axial force is applied to the valve body in a hydraulic mode, the channel switching valve body 2 is pushed, the axial hydraulic channel 21 is not communicated with the drilling hydraulic channel 13, the radial hydraulic channel 22 is aligned with the radial jet flow nozzle 12, namely the drilling hydraulic channel 13 is closed, the radial hydraulic channel 22 is opened, and high-pressure water is sprayed out from the radial jet flow nozzle 12, so that the conversion from the drilling operation to the slotting production increasing operation is realized.

However, in the method, the opening and closing of the drilling hydraulic channel 13 and the radial hydraulic channel 22 are controlled by hydraulic pressure, the control process is unstable, the situation that the radial jet nozzle 12 cannot be opened smoothly in the process of production increasing operation can occur, and the reliability of the drilling production increasing combined operation is reduced; and because the drilling hydraulic channel 13 is arranged on the shell 1, the drilling hydraulic channel 13 is relatively narrow, and large fluid friction resistance is easily formed during drilling, so that the effects of drilling, breaking rocks and removing rock debris are influenced, and the drilling efficiency is reduced.

Therefore, how to improve the reliability of the drilling efficiency and the drilling production increase combined operation is a technical problem to be solved urgently by the technical personnel in the field.

Disclosure of Invention

The invention mainly aims to provide an underground yield increasing pup joint, an oil and gas drilling yield increasing combined operation system and a method, and aims to solve the problem that in the prior art, the drilling efficiency and the reliability of the drilling yield increasing combined operation are low.

Aiming at the problems, the invention provides an underground production increasing pup joint which is applied to an underground drilling production increasing combined subsystem in an oil and gas drilling production increasing combined system, and comprises the following components:

one end of the shell is used for connecting a continuous pipe in the underground drilling production-increasing combined subsystem, and the other end of the shell is used for connecting a drill bit in the underground drilling production-increasing combined subsystem;

a radial fluidic channel disposed on the housing;

the high-pressure cutting nozzle is arranged at the outer end of the radial jet flow channel;

the first medium axial channel is internally provided with a valve body and a motor driving mechanism corresponding to the valve body; the motor driving mechanism is provided with a second medium axial channel; the valve body is provided with a third medium axial channel;

if the motor driving mechanism receives a drilling operation instruction, the motor driving mechanism can act in the direction departing from the valve body and is separated from the valve body, so that the radial jet flow channel and the first medium axial channel are closed, a drilling medium is conveyed to the drill bit through the first medium axial channel, the second medium axial channel and the third medium axial channel, and is ejected by a rock breaking nozzle of the drill bit to perform drilling operation;

if the motor driving mechanism receives a yield increasing operation instruction, the motor driving mechanism can act along the direction towards the valve body and is in butt joint with the valve body to drive the valve body to act so as to enable the radial jet flow channel to be communicated with the first medium axial channel, and a drilling medium is conveyed to the high-pressure cutting nozzle through the first medium axial channel, the second medium axial channel and the radial jet flow channel and is sprayed out by the high-pressure cutting nozzle to perform yield increasing operation.

Further, in the above-mentioned downhole production increasing nipple, the valve body includes:

the limiting component is fixed on the shell and provided with a first opening;

one end of the elastic component is positioned on the limiting component and is provided with a second opening;

the sliding component is connected with the other end of the elastic component and used for switching the state between the radial jet flow channel and the first medium axial channel under the action of the motor driving mechanism and the elastic component; the states include a connected state and a closed state; the sliding part is provided with a third opening;

the first, second, and third openings form the third media axial passage.

Further, in the above-mentioned downhole production increasing nipple, the motor drive mechanism includes:

the righting component is fixed on the shell and provided with a fourth opening;

the outer cylinder is fixed on the righting part, and a control part, a motor, a transmission device and a push rod which are sequentially connected are arranged in the outer cylinder; wherein the control component is used for controlling the motor to rotate; the transmission device is used for converting the rotation of the motor into linear motion, so that the linear motion of the push rod is controlled, and the push rod is in butt joint with or separated from the sliding component.

Further, in the downhole stimulation nipple, the push rod comprises an end part and a tail part; the tail part is connected with the transmission device, the end part is connected with the tail part, and the radial size of the cross section of the end part is larger than that of the cross section of the tail part;

the first medium axial channel is internally provided with:

the stop block is positioned on one side, away from the elastic part, of the sliding part and is provided with a fifth opening; the diameter of the fifth open hole is larger than the radial size of the cross section of the end part, so that a gap is reserved between the stop block and the tail part after the push rod drives the sliding part to act.

The invention also provides an oil and gas drilling production increasing combined operation system, which comprises:

an uphole drilling control subsystem;

a downhole drilling stimulation sub-system, comprising:

the composite cable is connected with the aboveground well drilling control subsystem;

the drill bit is provided with a rock breaking nozzle;

a downhole stimulation sub as claimed in any preceding claim disposed between the coiled tubing and the drill bit; one end of the shell is connected with the continuous pipe, and the other end of the shell is connected with the drill bit.

Further, in the above oil and gas drilling stimulation combined system, the uphole drilling control subsystem includes:

an intelligent decision analysis device;

composite coiled tubing rig apparatus in the ground, it includes:

the communication equipment is in communication connection with the intelligent decision analysis device;

the first control equipment is connected with the communication equipment and used for executing a first control equipment instruction sent by the intelligent decision analysis device;

the downhole drilling stimulation combined subsystem further comprises:

the second control equipment is connected with the continuous pipe and used for executing a second control equipment instruction sent by the intelligent decision analysis device;

and the data acquisition equipment is connected with the continuous pipe and used for acquiring drilling monitoring data in the drilling process and sending the drilling monitoring data to the intelligent decision analysis device through the composite cable and the communication equipment.

Further, in the above oil and gas drilling production increase combined operation system, the intelligent decision analysis device is configured to generate at least one of the first control device instruction, the second control device instruction, the drilling operation instruction, and the production increase operation instruction according to the drilling monitoring data and with a goal of optimizing drilling operation, so as to control at least one of the first control device, the second control device, and the downhole production increase sub to operate; and generating risk prediction information and drilling parameter optimization information of the drilling working condition according to the drilling monitoring data.

The invention also provides an oil and gas drilling production increase combined operation method by using the oil and gas drilling production increase combined operation system, which is characterized by comprising the following steps:

A. preparing the construction of an aboveground drilling control subsystem;

B. the following steps are executed in the process of drilling and production increase combined operation each time, and the underground drilling and production increase combined operation subsystem is started up and oil extraction equipment is put into a well hole for production after construction is finished;

b1, drilling operation: starting a ground power supply and a slurry pump in an uphole drilling control subsystem, driving a drill bit to rotate by an electric motor in a downhole drilling production-increasing combined subsystem to break rock, conveying the first medium axial channel, the second medium axial channel and the third medium axial channel to the drill bit, spraying the first medium axial channel, the second medium axial channel and the third medium axial channel to a rock breaking nozzle of the drill bit to generate high-pressure water jet to break the rock, rotating the drill bit to break the rock, and discharging broken rock debris to the ground from a continuous pipe and a well bore annulus while drilling well fluid;

b2, when the drilling depth reaches the preset depth, the mud pump is shut down, and the drilling operation is stopped;

b3, first switching nozzle: communicating the radial jet channel with the first media axial channel to open the high pressure cutting nozzle;

b4, first-stage stimulation operation: starting a high-pressure pump in an uphole drilling control subsystem, improving the discharge capacity and pressure of a high-pressure pump set, pumping fracturing fluid capable of forming a high-permeability proppant in situ from the ground, driving an electric motor in a downhole drilling production-increasing combined subsystem to rotate a downhole production-increasing short section, and slowly lifting a continuous pipe to enable a high-pressure cutting nozzle to axially displace while rotating, so as to form a transverse surface seam vertical to the axis of a shaft;

b5, second-stage stimulation operation: stopping the high-pressure pump set after the first-stage yield increasing operation is finished, dragging the continuous pipe to enable the high-pressure cutting nozzle to be aligned to the position of the second-stage oil gas enrichment area, starting the high-pressure pump set to repeat B3 for the second-stage yield increasing operation until the yield increasing operation at each stage is finished, stopping the high-pressure pump set, and stopping the yield increasing operation;

b6, second switching nozzle: and closing the radial jet flow channel and the first medium axial channel to close the high-pressure cutting nozzle for the next drilling production increasing combined operation.

Further, in the method described above, the drilling medium comprises a drilling fluid and a pad fluid;

before the discharge capacity and the pressure of the high-pressure pump group are increased, the method further comprises the following steps:

and circulating the shaft by using the pad fluid to displace the drilling fluid in the shaft.

Further, the method described above further includes:

the method comprises the steps that a logging-while-drilling device, a logging-while-drilling device and a near bit measuring device in a downhole drilling and production increasing combined subsystem acquire drilling monitoring data, the drilling monitoring data are transmitted to an uphole drilling control subsystem through a composite cable in a continuous pipe, the uphole drilling control subsystem analyzes drilling historical data and the drilling monitoring data by adopting a machine learning algorithm according to requirements of enterprise users, the drilling operation is optimized as a target, a drilling regulation and control instruction is generated, the drilling regulation and control instruction is transmitted to the downhole drilling and production increasing combined subsystem through the composite cable, the downhole drilling and production increasing combined subsystem works according to drilling parameters in the drilling regulation and control instruction, and risk prediction information and drilling parameter optimization information of drilling conditions are generated according to the drilling monitoring data.

Compared with the prior art, one or more embodiments in the above scheme can have the following advantages or beneficial effects:

by applying the underground production increasing pup joint, the oil and gas drilling production increasing combined operation system and the method of the embodiment of the invention, by arranging the radial jet flow channel and the high-pressure cutting nozzle on the shell, arranging the valve body and the motor driving mechanism corresponding to the valve body in the first medium axial channel, driving the valve body to act by using the motor driving mechanism, switching between the high-pressure cutting nozzle and the rock breaking nozzle of the drill bit is completed, the switching between the high-pressure cutting nozzle and the rock breaking nozzle of the drill bit is more stable compared with the switching between hydraulic control and the high-pressure cutting nozzle and the rock breaking nozzle of the drill bit is ensured to be smoothly opened in the process of yield increasing operation, and simultaneously, the motor driving mechanism is provided with a second axial channel, the valve body is provided with a third axial channel, the thickness of the valve body is not limited any more, the second axial channel and the third axial channel are as wide as possible, the fluid friction during drilling is reduced, and the drilling rock breaking and debris removing efficiency is improved. By adopting the technical scheme of the invention, the drilling efficiency and the reliability of the drilling production increase combined operation can be improved.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram of a downhole stimulation nipple of the prior art;

FIG. 2 is a schematic structural view of an embodiment of the downhole stimulation sub of the present invention;

3 FIG. 33 3 is 3 a 3 schematic 3 view 3 of 3 the 3 structure 3 in 3 the 3 direction 3 A 3- 3 A 3 in 3 FIG. 32 3; 3

FIG. 4 is a schematic view of the working state of the downhole stimulation sub in a stimulation operation state;

FIG. 5 is a schematic structural diagram of an embodiment of the oil and gas drilling stimulation combined operation system of the present invention;

FIG. 6 is a schematic diagram of a fracture surface formed after a multi-lateral well drilling stimulation operation.

Detailed Description

The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.

Example one

In order to solve the technical problems in the prior art, the embodiment of the invention provides an underground production increasing nipple which is applied to an underground drilling production increasing combined sub system in an oil and gas drilling production increasing combined system.

3 fig. 32 3 is 3 a 3 schematic 3 structural 3 diagram 3 of 3 an 3 embodiment 3 of 3 the 3 downhole 3 stimulation 3 sub 3 of 3 the 3

invention

3, 3 and 3 fig. 33 3 is 3 a 3 schematic 3 structural 3 diagram 3 in 3 the 3 direction 3 of 3 a 3- 3 a 3 in 3 fig. 32 3, 3 as 3 shown 3 in 3 fig. 32 3- 33 3, 3 the 3 downhole 3 stimulation 3 sub 3 of 3 the 3 embodiment 3 may 3 include 3 a 3 housing 31 3, 3 a 3 radial 3 jet 3 channel 3 11 3, 3 a 3 high 3- 3 pressure 3 cutting 3 nozzle 3 12 3, 3 and 3 a 3 first 3 medium 3 axial 3 channel 3 m 31 3. 3

In this embodiment, one end of the casing 1 is used for connecting a coiled tubing in the downhole drilling production-increasing combined subsystem, and the other end of the casing 1 is used for connecting a drill bit in the downhole drilling production-increasing combined subsystem. A radial jet channel 11 is arranged on the housing 1; the high-pressure cutting nozzle 12 is arranged at the outer end of the radial jet flow channel 11; a valve body 3 and a motor driving mechanism 4 corresponding to the valve body 3 are arranged in the first medium axial channel M1; wherein the motor drive mechanism 4 is provided with a second medium axial channel M2; the valve body 3 is provided with a third medium axial passage M3.

In a specific implementation process, as the drilling hydraulic channel is designed on the casing 1 in fig. 1, the overall thickness of the casing 1 is limited, and therefore, the width of the drilling hydraulic channel in fig. 1 is limited, and a large fluid friction is easily formed, which affects the drilling rock breaking and debris removing effects. In the embodiment, the second medium axial channel M2 and the third medium axial channel M3 are not arranged on the housing 1, so that the second medium axial channel M2 and the third medium axial channel M3 can be designed to be as wide as possible by designers, thereby reducing fluid friction during drilling, and improving the efficiency of drilling for breaking rock and removing rock debris.

In this embodiment, if the motor driving mechanism 4 receives a drilling operation command, the motor driving mechanism 4 can move in a direction away from the valve body 3, and separate from the valve body 3, so as to close the radial jet channel 11 and the first medium axial channel M1, so that the flow path of the drilling medium can be switched to the first medium axial channel M1, the second medium axial channel M2 and the third medium axial channel M3, so that the drilling medium is conveyed to the drill bit through the first medium axial channel M1, the second medium axial channel M2 and the third medium axial channel M3, and is ejected by the rock breaking nozzle of the drill bit to perform the drilling operation, an electric motor in the downhole drilling production increasing combined subsystem drives the drill bit to rotate to break rock, and the first medium axial channel M1, And the second medium axial channel M2 and the third medium axial channel M3 are conveyed to the drill bit through channels, and are sprayed out by a rock breaking nozzle of the drill bit to generate high-pressure water jet for breaking rock, meanwhile, the drill bit rotates to realize rotary rock breaking, and broken rock debris is returned to the ground from a continuous pipe and a borehole annulus while drilling well fluid.

If the motor driving mechanism 4 receives a stimulation operation command, the motor driving mechanism 4 can move in a direction toward the valve body 3, abut against the valve body 3, and drive the valve body 3 to move, so that the radial jet flow channel 11 is communicated with the first medium axial channel M1, and thus, the flow path of the drilling medium can be switched to the first medium axial channel M1, the second medium axial channel M2 and the radial jet flow channel 11, so that the drilling medium is conveyed to the high-pressure cutting nozzle 12 through the first medium axial channel M1, the second medium axial channel M2 and the radial jet flow channel 11, and is ejected by the high-pressure cutting nozzle 12 to perform stimulation operation. Specifically, an electric motor in the underground drilling and production increasing combined subsystem drives an underground production increasing short section to rotate, and meanwhile, the continuous pipe is lifted up slowly, so that the high-pressure cutting nozzle 12 rotates and simultaneously generates axial displacement, a transverse plane seam perpendicular to the axis of the shaft is formed, and the production increasing operation is carried out.

The underground production increasing short joint of the embodiment is characterized in that a radial jet flow channel 11 and a high-pressure cutting nozzle 12 are arranged on a shell 1, the valve body 3 and the motor driving mechanism 4 corresponding to the valve body 3 are arranged in the first medium axial channel M1, the motor driving mechanism 4 is used for driving the valve body 3 to act, the switching between the high-pressure cutting nozzle 12 and the rock breaking nozzle of the drill bit is completed, the switching between the high-pressure cutting nozzle 12 and the rock breaking nozzle of the drill bit is more stable compared with the hydraulic control, the radial jet flow nozzle can be opened smoothly in the process of yield increasing operation, and meanwhile, the second axial channel is arranged on the motor driving mechanism 4, the third axial channel is arranged on the valve body 3, the thickness of the shell 1 is not limited, the second axial channel and the third axial channel are as wide as possible, the fluid friction during drilling is reduced, and the drilling rock breaking and debris removing efficiency is improved. By adopting the technical scheme of the invention, the drilling efficiency and the reliability of the drilling production increase combined operation can be improved.

Example two

As shown in fig. 2, the valve body 3 of the downhole stimulation sub of the present embodiment may include a position limiting member 31, an elastic member 32, and a sliding member 33.

In this embodiment, the limiting member 31 is fixed on the housing 1 and is provided with a first opening; for example, the stopper member 31 may be fixed to the housing 1 by a bolt assembly. The limiting part 31 can adopt at least two limiting blocks in an L line, a gap is reserved between every two adjacent limiting blocks, and the gap reserved between every two adjacent limiting blocks can be used as a first opening. Or an integral structure with a hole in the middle can be adopted.

An elastic member 32 having one end positioned on the position limiting member 31 and provided with a second opening; in this embodiment, the elastic member 32 is preferably a spring, so that the center hole of the spring serves as the second opening.

A sliding member 33 connected to the other end of the elastic member 32, for switching the state between the radial jet flow passage 11 and the first medium axial passage M1 under the action of the motor driving mechanism 4 and the elastic member 32; the states include a connected state and a closed state; and the sliding member 33 is provided with a third open hole; in practice, the sliding member 33 may include a head portion and a tail portion, and the tail portion is inserted into the spring to prevent the spring from being separated from the stopper member 31. In this embodiment, the first opening, the second opening, and the third opening form the third media axial passage M3.

As shown in fig. 2, the motor drive mechanism 4 includes a righting member 41, an outer cylinder 42, a control member 43, a motor 44, a transmission 45, and a push rod 46.

The righting part 41 is fixed on the shell 1, and the righting part 41 is provided with a fourth opening. Specifically, as shown in fig. 3, fig. 3 only shows the structural relationship diagram of the casing 1, the centralizing part 41 and the outer cylinder 42, the centralizing part 41 may be formed by a plurality of centralizing blocks, and the pores between two adjacent centralizing blocks may serve as four openings for the drilling medium to flow through.

The outer cylinder 42 is fixed on the righting component 41, a control component 43, a motor 44 and a transmission device 45 which are connected in sequence are arranged in the outer cylinder 42, and the outer cylinder 42 plays a role in protection; wherein, the control component 43 is used for controlling the motor 44 to rotate; the transmission device 45 is used for converting the rotation of the motor 44 into a linear motion, so as to control the linear motion of the push rod 46, and the push rod 46 is butted with or separated from the sliding component 33. Wherein the control means 43 may comprise a signal receiver, a motor 44 controller and an overload protector, and the transmission 45 is preferably a ball screw transmission 45.

In this embodiment, the signal receiver is used for receiving a control signal transmitted from the ground, the controller of the motor 44 is used for controlling parameters such as the number of rotations and the rotational speed of the motor 44, and the overload protector is used for protecting the motor 44 from being damaged by excessive current and voltage. The ball screw transmission 45 converts the rotational motion of the motor 44 into a linear motion, thereby controlling the forward and backward motion of the push rod 46.

The lower end of the push rod 46 is designed to be T-shaped, so that after the push rod 46 pushes the slide block to open the high-pressure cutting nozzle 12, the drilling medium can be ejected from the high-pressure cutting nozzle 12 at a high speed through the space between the shell 1 and the push rod 46. When in a normal drilling state, the sliding block closes the high pressure cutting nozzle 12 due to the elastic action of the spring, and the drilling medium flows from the first medium axial passage M1, the second medium axial passage M2, and the third medium axial passage M3 to the drill bit. In the stimulation work, the push rod 46 pushes the slide member 33 to compress the spring, and the high-pressure cutting nozzle 12 is opened to start the high-pressure cutting stimulation work. The diameter of the high-pressure cutting nozzle 12 is 0.2mm-5 mm.

In practical applications, the sliding component 33 may cause the high-pressure cutting nozzle 12 to open due to the impact of the drilling fluid, and therefore, in this embodiment, the stopper 5 is further disposed in the first medium axial passage M1.

The stopper 5 is positioned on one side of the sliding part 33, which is far away from the elastic part 32, and is provided with a fifth opening; in this embodiment, the pushrod 46 includes an end portion and a tail portion; the tail is connected with the transmission device 45, the end part is connected with the tail, and the radial size of the cross section of the end part is larger than that of the cross section of the tail; the aperture of the fifth open pore is larger than the radial dimension of the cross section of the end part, so that a gap is reserved between the stop dog and the tail part after the push rod drives the sliding part to act. The stop 5 serves to limit the upper limit position of the sliding member 33 and to limit the impact of incoming flow, the presence of the stop 5 being such that the sliding member 33 does not cause the high pressure cutting nozzle 12 to open due to the impact of drilling fluid during normal drilling.

In this embodiment, fig. 3 is a schematic view of a working state of the downhole stimulation sub in a drilling operation state. Fig. 4 is a schematic view of the working state of the downhole stimulation nipple in the stimulation operation state.

EXAMPLE III

In order to solve the technical problems in the prior art, the embodiment of the invention provides an oil and gas drilling production increasing combined operation system.

Fig. 5 is a schematic structural diagram of an embodiment of the oil and gas drilling production increase combined operation system of the present invention, and as shown in fig. 5, the oil and gas drilling production increase combined operation system of the present embodiment may include an uphole drilling control subsystem 100 and a downhole drilling production increase combined operation subsystem 101.

The downhole drilling stimulation sub 101 may include a coiled tubing 1011, a drill bit 1012, and the downhole stimulation sub 1013 of the embodiments described above.

A composite cable connected with the uphole drilling control subsystem 100 is arranged in the continuous pipe 1011;

a drill 1012 and provided with a rock breaking nozzle;

a downhole stimulation sub 1013 disposed between the coiled tubing 1011 and the drill bit 1012; one end of the housing 1 is connected to the coiled pipe 1011, and the other end of the housing 1 is connected to the drill 1012.

In this embodiment, the uphole drilling control subsystem 100 can send a drilling operation command or a stimulation operation command to the motor drive mechanism 4. If the motor driving mechanism 4 receives a drilling operation command, the motor driving mechanism 4 can move in a direction away from the valve body 3, separate from the valve body 3, and drive the valve body 3 to move, so that the radial jet flow channel 11 and the first medium axial channel M1 are closed, and thus, a flow path of a drilling medium can be switched to the first medium axial channel M1, the second medium axial channel M2 and the third medium axial channel M3, so that the drilling medium is conveyed to the drill bit 1012 through the first medium axial channel M1, the second medium axial channel M2 and the third medium axial channel M3, and is ejected by a rock breaking nozzle of the drill bit 1012 to perform the drilling operation, the electric motor 1015 in the downhole drilling production increasing combined subsystem 101 drives the drill bit 1012 to rotate to break rock, and the first medium axial channel M1, the second medium axial channel M2 and the third medium axial channel M3 are connected to the drill bit 1012 to perform the drilling operation The second medium axial channel M2 and the third medium axial channel M3 are conveyed to the drill bit 1012, and are sprayed out by a rock breaking nozzle of the drill bit 1012 to generate high-pressure water jet for rock breaking, meanwhile, the drill bit 1012 rotates to realize rotary rock breaking, and broken rock debris is discharged to the ground from the continuous pipe 1011 and the borehole annulus while drilling fluid.

If the motor driving mechanism 4 receives a stimulation operation command, the motor driving mechanism 4 can move in a direction toward the valve body 3, abut against the valve body 3, and drive the valve body 3 to move, so that the radial jet flow channel 11 is communicated with the first medium axial channel M1, and thus, the flow path of the drilling medium can be switched to the first medium axial channel M1, the second medium axial channel M2 and the radial jet flow channel 11, so that the drilling medium is conveyed to the high-pressure cutting nozzle 12 through the first medium axial channel M1, the second medium axial channel M2 and the radial jet flow channel 11, and is ejected by the high-pressure cutting nozzle 12 to perform stimulation operation. Specifically, the electric motor 1015 in the downhole drilling and production increasing combined subsystem 101 drives the downhole production increasing nipple 1013 to rotate, and simultaneously, the continuous pipe 1011 is slowly lifted up, so that the high-pressure cutting nozzle 12 rotates and simultaneously generates axial displacement, a transverse plane seam perpendicular to the shaft axis is formed, and the production increasing operation is performed.

The result obtained by adopting the technical scheme of the invention is shown in fig. 6, wherein fig. 6 is a schematic diagram of a fracture surface formed after the production-increasing combined operation of the multilateral well drilling. As shown in fig. 6, after the multi-lateral well drilling stimulation operations, a main wellbore 60, a lateral wellbore 61, and a face seam 62 may be formed.

Example four

As shown in fig. 4, the uphole drilling control subsystem 100 in this embodiment may include an intelligent decision-making analysis device 1001 and a surface hybrid coiled tubing drilling device 1002. The surface hybrid coiled tubing drill rig apparatus 1002 includes a communication device (not shown), a first steering device. The first control device may include a composite coiled tubing rig train 10022, a drum 100023, a mud pump 10024, a high pressure pump set 10025, etc., and the surface composite coiled tubing rig apparatus 1002, which may also be known to those skilled in the art, may further include a surface power supply 10026, a surface power transformer 10027, an injector head 10028, etc.

In this embodiment, the communication device is in communication connection with the intelligent decision analysis device 1001; and the first control device is connected with the communication device, and is configured to execute the first control device instruction sent by the intelligent decision analysis device 1001. For example, turning on or off a mud pump 10024, turning on or off a high pressure pump set 10025, increasing or decreasing the rotational speed of the drum 100023, and the like.

In practical applications, the downhole drilling stimulation and production increase combined subsystem 101 further includes a second operation device and a data acquisition device. In this embodiment, the second steering apparatus may include an electric disconnect 1014, an electric motor 1015, a downhole tractor 1016, a rotary guide 1017, and the like. The data acquisition equipment includes Logging While Drilling (LWD) 1018, Measurement While Drilling (MWD) 1019, near bit measurement 1020, and the like. Those skilled in the art will also appreciate that the downhole stimulation sub 101 may also include a wet joint 1021, a downhole power transformer 1022, and the like.

In a specific implementation process, a second control device connected to the continuous pipe 1011 is configured to execute a second control device instruction sent by the intelligent decision analysis apparatus 1001; and the data acquisition equipment is connected with the continuous pipe 1011 and used for acquiring drilling monitoring data in a drilling process and sending the drilling monitoring data to the intelligent decision analysis device 1001 through the composite cable and the communication equipment, so that the intelligent decision analysis device 1001 generates at least one of the first control equipment instruction, the second control equipment instruction, the drilling operation instruction and the yield increase operation instruction according to the drilling monitoring data.

In this embodiment, the wet joint 1021 provides mechanical and electrical connection for a subsequent downhole tool string, while a check valve is integrated on the wet joint 1021 to prevent backflow of drilling medium.

The downhole power transformer 1022 transforms the power transmitted through the internal cable coiled tubing 1011 and transmits the transformed power to the electric disconnecting device 1014, the logging while drilling device 1018, the logging while drilling measuring device 1019, the electric motor 1015, the downhole tractor 1016, the rotary guide 1017, the near-bit measuring device 1020 and the downhole stimulation sub 1013.

The electric disconnecting device 1014 is provided with an electric disconnector, and once accidents such as drill sticking and drill burying occur, the electric disconnecting function can be realized by sending electric signals through the electric disconnector, so that the coiled tubing is withdrawn.

The logging while drilling device 1018 and the logging while drilling measuring device 1019 refer to instruments for timely measuring engineering and geological parameters in the drilling process. The measurable parameters comprise engineering parameters such as well deviation, azimuth, tool face, impact vibration, weight on bit, torque, bending moment and the like, and geological parameters such as resistivity, porosity, density, acoustic time difference, gamma and the like.

An electric motor 1015 is powered by a coiled tubing 1011 with an internal composite cable, and a motor rotor rotates the drill bit 1012. The ground signal can be transmitted to the electric motor 1015 through the continuous pipe 1011 of the built-in composite cable, and the control of the rotating speed and the torque of the motor is realized.

During the drilling process of the coiled tubing 1011, the coiled tubing 1011 does not rotate in the borehole, so that the problems of resistance to lowering and limited extension length easily occur. Power is supplied to the servo stepper motor in the downhole tractor 1016 through the umbilical 1011 to provide tractive force to extend the umbilical 1011 downhole. The downhole tractor 1016 is relatively simple in structure because the downhole tractor can realize downhole traction and crawling only by being electrified and does not depend on hydraulic driving. The ground signal controls the slip opening and the gripping force of the downhole tractor 1016, thereby realizing the control of the traction and crawling distance.

The rotary guide 1017 ensures that the drilling tool drills along the specified direction in the full-rotation state, can accurately control the track of the well, improves the smoothness of the well, reduces the risk of sticking the drill and reduces the drilling cost. Power is supplied to the rotary steerable 1017 through the cable and control signals are transmitted to ensure that the drill bit 1012 drills in the desired direction.

The near bit measuring device 1020 can measure and predict formation information in front of and around the bit 1012 in real time during the drilling process of the bit 1012, thereby achieving the goal of geosteering drilling. The near-bit measuring device 1020 measures geological parameters such as formation resistivity, natural gamma and the like at a position closest to a bit, the measured signals are transmitted to the ground through a built-in cable coiled tubing, and after being analyzed, trained and predicted by the ground intelligent decision analysis device 1001, instructions are sent to modify drilling parameters in real time.

The drilling medium of the present embodiment may include a drilling fluid and a pad fluid. In the process of drilling operation, the continuous pipe 1011 with the built-in composite cable is inserted into the injector 10028, the continuous pipe is lowered into the underground drilling production-increasing combined system, the ground power source 10026 and the slurry pump 10024 are started, the electric motor 1015 drives the drill bit 1012 to rotate to break the rock, the drilling fluid is ejected from the rock breaking nozzle of the drill bit 1012 to assist in breaking the rock, and rock debris is carried to the ground.

In the process of production increase operation, firstly, injecting a pad fluid into a stratum to displace the drilling fluid in a shaft, wherein the pad fluid is composed of a clay stabilizer, a biological enzyme, a composite active agent, a fluorocarbon surfactant, water and other materials according to a certain proportion; the formation is then cut with the high pressure fluid. When the stratum closing pressure is larger (more than or equal to 50MPa), the fracturing fluid capable of forming the high-permeability proppant in situ is sprayed to the stratum through the continuous pipe 1011 at high pressure in the process of yield increase operation, the injected fracturing fluid can be converted into discrete proppant solid particles in situ, the length and the height of a crack surface formed by high-pressure cutting are effectively supported, a complex crack net can be formed, and the volume maximization of oil layer transformation is realized to the maximum extent. The liquid is composed of a primary liquid precursor and a secondary liquid precursor, wherein the primary liquid precursor comprises materials such as a surfactant, a liquid solvent, a spherulite-forming compound and the like for forming micelles, and the secondary liquid precursor comprises materials such as a curing agent, a co-curing agent and the like. When the stratum closing pressure is low (less than 50MPa), high-pressure clean water can be directly sprayed into the stratum for stratum cutting, grinding materials can be added into the clean water, and rock debris formed in the cutting process is used as a propping agent, so that the opening degree of a fracture is ensured.

In a specific implementation process, the intelligent decision analysis device 1001 integrates the functions of pre-operation design, operation real-time optimization, post-operation evaluation, and the like, and can perform intelligent analysis and decision making according to the well-drilled historical data and the downhole real-time data of the well drilling, then transmit a control signal to the downhole to realize adjustment and optimization of the well drilling and production increasing parameters, and perform accident early warning, for example, according to the well drilling monitoring data, generate risk prediction information of the well drilling condition and drilling parameter optimization information. Therefore, the intelligent drilling and production increasing integrated closed-loop operation is really realized. According to the drilling monitoring data, aiming at optimizing drilling operation, generating at least one of the first control equipment instruction, the second control equipment instruction, the drilling operation instruction and the stimulation operation instruction so as to control at least one of the first control equipment, the second control equipment and the downhole stimulation pup joint to operate; and generating risk prediction information of the drilling working condition according to the drilling monitoring data.

In this embodiment, the intelligent decision analysis device 1001 may include a data receiver 10011, a data storage 10012, a data processor 10013, a machine learning server 10014, and a Web server 10015.

The data receiver 10011 is used for receiving downhole real-time drilling and stimulation data returned in the drilling and stimulation processes. The data storage 10012 is used for storing the drilling stimulation history data and the collected real-time data of all wells in the block where the construction well is located. The real-time drilling data comprises drilling time data, footage data, mechanical drilling speed data, measurement while drilling data, well deviation, azimuth, temperature, drilling fluid performance data, near-bit reservoir physical property data, energy consumption data and the like. The real-time stimulation data includes surface pump displacement, surface pump pressure, nozzle pressure, high pressure jet stimulation location, etc. The data processor 10013 constructs a data set using the returned real-time drilling and stimulation data, including data definition, data association, data extraction, data fusion, data cleansing, and the like. The machine learning server 10014 is configured to perform machine learning on the historical data and the real-time data to obtain optimized data, where the historical data is not more than 50% and not less than 20%. The adopted machine learning algorithm comprises a convolutional neural network, a support vector machine, a decision tree, naive Bayes classification, K-means clustering, principal component analysis, independent component analysis, Monte Carlo tree search, an Apriori algorithm and the like. The Web server 10015 is used to associate account requests of enterprise users (including drilling teams, remote experts, etc.), and the users can control the whole intelligent decision analysis device 1001 through the Web server 10015. In addition, the Web server 10015 can also receive a control instruction sent by the terminal device, and the control instruction is transmitted to the data receiver 10011, and then the control instruction is sent to the ground coiled tubing 1011 composite drilling machine device and the downhole drilling stimulation combined subsystem 101.

In the drilling operation process, the intelligent decision analysis device 1001 intelligently analyzes drilling history and real-time data by adopting a machine learning algorithm according to the requirements of enterprise users, generates a regulation and control instruction for the ground composite coiled tubing drilling machine device 1002 by taking optimization of the drilling operation as a target, and transmits the instruction to the underground drilling production increase combined subsystem 101 through a built-in cable coiled tubing to achieve the purpose of regulating drilling parameters; in the process of yield increase operation, engineering and geological data acquired in the drilling process are utilized, and after intelligent analysis is carried out by the intelligent decision analysis device 1001, parameters such as pump pressure, discharge capacity, the rotation speed of the yield increase pup joint 1013 in the pit, the lifting speed of the coiled tubing 1011 and the like are optimized, so that the purpose of contacting an oil-gas enrichment area to the maximum extent at the lowest cost is achieved.

Specifically, a drilling hydraulics calculation model, a drilling string mechanics calculation model, a wellbore stability analysis model, a drilling risk prediction and diagnosis model, a wellbore trajectory calculation model, a mechanical drilling speed and cost prediction model, and a formation pressure while drilling prediction model may be set in the intelligent decision analysis device 1001;

the drilling hydraulics calculation model is used for reading the basic data source input by the input device and obtaining the characteristics of a drilling pump, the structure of a drill string, the category of a drill bit 1012, the performance of drilling fluid and the flow state of the drilling fluid in a pipe and an annulus; and calculating to obtain real-time drilling circulating flow pressure consumption, and optimally determining drilling hydraulic target parameters by combining with a hydromechanics basic theory so as to generate a control instruction for a drilling process.

The drilling string mechanical calculation model is used for reading current actual drilling tool combination data input by the input device and obtaining drilling tool attributes in the actually used drilling string, wherein the drilling tool attributes comprise drilling tool types, drilling tool lengths, drilling tool inner diameter and outer diameter values, drilling tool tensile and torsional resistance values, drilling tool service life and drilling tool grade information; and calculating to obtain the mechanical data of the drilling tool during real-time drilling, optimizing and determining the limit constraint protection parameters of the drilling machinery, and further generating a control instruction for the drilling process.

The borehole stability analysis model is used for reading the derived data source input by the input device, obtaining the real-time pressure balance characteristic of the drilling fluid in the annular stratum, automatically calculating and identifying the lithology of the stratum and the drillability stability characteristics of different strata and lithology, and optimizing drilling mud and hydraulic parameters.

The drilling risk prediction and diagnosis model is used for pre-establishing various drilling risk models; inputting the basic data source input by the input device into the drilling risk model, operating the drilling risk model, and performing risk prediction on the site drilling working condition; the well drilling risk model comprises a kick risk model, a blowout risk model, a leakage risk model and a stuck drill risk model.

The operation process of the kick risk model, the blowout risk model and the lost circulation risk model is that the change conditions of gas detection, drilling time data and drilling fluid parameters are obtained through the basic data source, and the related risks are predicted by analyzing the change conditions of the gas detection, the drilling time data and the drilling fluid parameters.

The stuck drill risk model comprises a pressure difference sticking stuck drill risk model, a sand setting stuck drill risk model, a collapse stuck drill risk model, a well wall block falling drill risk model, a pump opening blocking leaking drill risk model, a well falling object stuck drill risk model, a reducing stuck drill risk model, a key groove stuck drill risk model and a drill bit 1012 mud bag stuck drill risk model.

The borehole trajectory calculation model is used for obtaining real complete information of a stratum profile, and comprises stratum lithology and density, reservoir characteristics and a mark layer, a gas cap, an oil layer, an interlayer, oil bottom lithology and depth thereof, stratum fluid depth and fluid pressure, fluid properties, a real-drilling three-dimensional well trajectory, real-time working conditions of a drill string and various assemblies thereof, and a drill bit 1012, and dynamic working conditions of underground drilling; and comprehensively analyzing and integrating the complete information of the stratigraphic section, interpreting and processing to obtain the optimized technical parameters and decisions of the section to be drilled, and comparing the optimized technical parameters and decisions with the designed well structure geology and engineering model moment to generate a control instruction for the drilling process.

The mechanical drilling speed and cost prediction model is used for predicting real-time drilling pressure and optimizing the drilling pressure and rotating speed; establishing a drilling objective function for a mathematical mode of a basic rule of a drilling process and a set optimization objective in a correlation mode; on the basis, the artificial intelligence control theory and various linear and nonlinear programming methods are applied, under the condition of determining various constraint conditions, various drilling parameters of the objective function are optimized, and then a control instruction for the drilling process is generated.

The formation pressure prediction while drilling model is used for controlling bottom hole pressure and automatically controlling a mud manifold system; the method specifically comprises the steps of analyzing and calculating the bottom hole pressure under the working conditions of pump stopping, drill pulling and drilling in real time, and establishing a bottom hole pressure control model by using a bottom hole pressure balance theory, so that the drilling and the drill pulling speed are optimized, a control instruction for the drilling process is further generated, and well invasion, overflow, well kick, blowout, well leakage and well collapse drilling accidents are controlled.

In conclusion, compared with the existing oil and gas exploitation technology, the invention has the following beneficial effects:

(1) high working efficiency

According to the method, the rock is broken by means of high-pressure water jet, the rotary grinding and rock breaking of the drill 1012 can be realized according to needs, the rapid and effective drilling can be implemented, and the method is not limited by the lithologic hardness of a reservoir. Meanwhile, after drilling, the underground production increasing operation can be realized by switching the rock breaking nozzle and the production increasing nozzle through ground control without tripping the drill. The whole drilling production increasing operation time is short, the construction risk is small, and the cost is greatly reduced.

(2) Good and stable yield increasing effect

When a low-permeability reservoir is fractured, due to the fact that rock physical properties of different rock stratums are different, hydraulic fracturing cannot accurately control the trend and the length of fractures, longitudinal fractures are easily generated during horizontal well fracturing, fracturing effect is poor, and water layers and gas layers can be fractured, so that water and gas can be invaded in advance. The method can effectively control the length, depth and width of the crack, and the injected fracturing fluid can be converted into a high-permeability proppant in situ, so that the crack is not easy to close. And the switching between the high-pressure cutting nozzle 12 and the rock breaking nozzle of the drill 1012 is controlled in a motor-driven mode in the pressurizing process, so that the radial jet nozzle can be smoothly opened in the yield increasing operation process, and the yield increasing operation is carried out.

(3) Wide adaptability of reservoir

The thickness change of part of complex oil and gas reservoir reservoirs is large, thin oil layers or thin interbed develop, and the accurate control difficulty of drilling horizontal well tracks is large. The technology can drill an ultra-short radius horizontal well, improve the drilling rate of a reservoir stratum, effectively control the track of a well hole and effectively reform a thin reservoir stratum.

In order to solve the technical problems in the prior art, an embodiment of the invention provides an oil and gas drilling production increase combined operation method by using the oil and gas drilling production increase combined operation system.

The oil and gas drilling production increase combined operation method of the embodiment specifically comprises the following steps:

A. preparing the construction of an aboveground drilling control subsystem;

specifically, a composite coiled tubing drill train set and matched hoisting equipment can be used for installing a coiled tubing injection head, and meanwhile, equipment such as a ground power supply, a power transformer, a slurry pump, a high-pressure pump set and the like are installed and connected with an intelligent decision analysis device.

b1, drilling operation: starting a ground power supply and a slurry pump in an uphole drilling control subsystem, driving a drill bit to rotate by an electric motor in a downhole drilling production-increasing combined subsystem to realize rock breaking, conveying the first medium axial channel, the second medium axial channel M2 and the third medium axial channel to the drill bit, spraying the medium to a rock breaking nozzle of the drill bit to generate high-pressure water jet for rock breaking, simultaneously rotating the drill bit to realize rotary rock breaking, and discharging broken rock debris to the ground from a continuous pipe and a well bore annulus while drilling well fluid;

Further, in the above embodiments, the drilling medium comprises a drilling fluid and a pad fluid;

before the step of increasing the displacement and the pressure of the high-pressure pump group is executed in the step B4, the following steps can be executed:

Further, in the above embodiment, the oil and gas drilling production increase combined operation method may further perform the following steps:

the method comprises the steps that a logging-while-drilling device, a logging-while-drilling device and a near bit measuring device in a downhole drilling and production increasing combined subsystem acquire drilling monitoring data, the drilling monitoring data are transmitted to an uphole drilling control subsystem through a composite cable in a continuous pipe, the uphole drilling control subsystem analyzes drilling historical data and the drilling monitoring data by adopting a machine learning algorithm according to requirements of enterprise users, the aim of optimizing drilling operation is fulfilled, a drilling regulation and control instruction is generated, the drilling regulation and control instruction is transmitted to the downhole drilling and production increasing combined subsystem through the composite cable, and the downhole drilling and production increasing combined subsystem works according to drilling parameters in the drilling regulation and control instruction.

EXAMPLE six

In this embodiment, the oil and gas drilling production increase co-operation method is described in more detail, and the oil and gas drilling production increase co-operation method of this embodiment may specifically perform the following steps:

(1) preparing ground construction: the method comprises the following steps of (1) installing a continuous oil pipe injection head by utilizing a composite continuous pipe drill rig group and matched hoisting equipment, installing equipment such as a ground power supply, a power transformer, a slurry pump, a high-pressure pump set and the like, and connecting the equipment with an intelligent decision analysis device;

(2) the first drilling and production increasing combined operation:

firstly, drilling operation, inserting a built-in cable coiled tubing into an injection head, putting the injection head into an underground drilling production increase combined subsystem, starting a ground power supply and a slurry pump, driving a drill bit to rotate by an electric motor to break rock, ejecting drilling fluid from a rock breaking nozzle of the drill bit to assist in breaking rock, and carrying rock debris to the ground. In the drilling process, the logging while drilling/measuring device and the near-bit measuring device acquire engineering and geological data in real time, and transmit the data to the ground and an intelligent decision analysis device through a cable in a continuous pipe. The intelligent decision analysis device intelligently analyzes drilling history and real-time data by adopting a machine learning algorithm according to the requirements of enterprise users, generates a regulation and control instruction for a ground composite continuous pipe drilling machine system by taking optimization of drilling operation as a target, and transmits the instruction to a downhole drilling production-increasing combined system through a built-in cable continuous oil pipe to achieve the purpose of adjusting drilling parameters;

secondly, stopping drilling: when the drilling reaches the preset depth, the slurry pump is closed, and the drilling operation is stopped;

third-stage yield increasing operation: and opening the high-pressure pump set, and using the front-end fluid to circulate the shaft to displace the drilling fluid in the shaft. And (3) a push rod of the underground production increasing pup joint is controlled by the ground to push the sliding body to compress the spring body, a high-pressure cutting nozzle is opened, the discharge capacity and pressure of a high-pressure pump set (the working discharge capacity is 50-300L/s, and the working pressure can reach 400MPa at most) are improved, and clear water or fracturing fluid of high-permeability proppant (determined according to the stratum closing pressure) can be pumped from the ground. Electric motor drive

And rotating the underground production increasing short section, and simultaneously slowly lifting the continuous oil pipe, so that the high-pressure cutting nozzle rotates and simultaneously generates axial displacement, and a transverse surface seam vertical to the shaft axis is formed. In the production increasing operation, engineering and geological data acquired in the drilling process are utilized, and after intelligent analysis is carried out by an intelligent decision analysis device, parameters such as pump pressure, discharge capacity, underground production increasing nipple rotating speed, continuous pipe lifting speed and the like are optimized, so that the purpose of contacting an oil-gas enrichment area to the greatest extent at the lowest cost is achieved.

Fourthly, second-stage yield increasing operation: and after the first-stage yield increasing operation is finished, the ground stops the high-pressure pump set. And the intelligent decision analysis device obtains the position of the second-stage oil-gas enrichment area according to engineering and geological data acquired in the drilling process. Dragging the high-pressure continuous pipe to enable the high-pressure cutting nozzle to be aligned to the position of the second-stage oil gas enrichment area, and starting a high-pressure pump set to perform second-stage yield increasing operation;

subsequent yield increasing operation: and fourthly, repeating the step IV to finish the subsequent yield increasing operation of each level.

(3) And the second drilling and production increase combined operation: and after the first drilling and production increasing combined operation is completed, the high-pressure pump set is stopped on the ground. And lifting the continuous pipe to the next branch well hole, starting a ground power supply and a slurry pump, and controlling the rotary steering by the intelligent decision analysis device to change the direction of the drill bit so as to drill along the next branch point in the drilling design. Repeating the first step and the fourth step in the step (2) to complete the drilling production increase combined operation of the next branch well;

(4) and (5) repeating the step (3) to finish the drilling production-increasing combined operation of a plurality of branch well bores.

(5) And after the construction is finished, closing the ground high-pressure pump group, taking out the underground drilling production increasing combined subsystem, and putting oil extraction equipment into a well hole for production.

It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a production increase nipple joint in pit which characterized in that is applied to in the oil gas drilling production increase combined operation system well drilling production increase combined operation subsystem in the pit, the production increase nipple joint in pit includes:

a radial fluidic channel disposed on the housing;

2. The downhole stimulation sub of claim 1, wherein the valve body comprises:

the limiting component is fixed on the shell and provided with a first opening;

the first, second, and third openings form the third media axial passage.

3. The downhole stimulation sub of claim 2, wherein the motor drive mechanism comprises:

4. A downhole stimulation sub according to claim 3, wherein the push rod comprises an end portion and a tail portion; the tail part is connected with the transmission device, the end part is connected with the tail part, and the radial size of the cross section of the end part is larger than that of the cross section of the tail part;

the first medium axial channel is internally provided with:

5. An oil and gas drilling production increase combined operation system is characterized by comprising:

an uphole drilling control subsystem;

a downhole drilling stimulation sub-system, comprising:

the drill bit is provided with a rock breaking nozzle;

the downhole stimulation sub of any of claims 1-4, disposed between the coiled tubing and the drill bit; one end of the shell is connected with the continuous pipe, and the other end of the shell is connected with the drill bit.

6. The oil and gas drilling stimulation working system according to claim 5, wherein the uphole drilling control subsystem comprises:

an intelligent decision analysis device;

composite coiled tubing rig apparatus in the ground, it includes:

the downhole drilling stimulation combined subsystem further comprises:

7. The oil and gas drilling production increase co-operation system of claim 6, wherein the intelligent decision analysis device is configured to generate at least one of the first control device command, the second control device command, the drilling operation command and the stimulation operation command to control at least one of the first control device, the second control device and the downhole stimulation sub to operate with a goal of optimizing a drilling operation according to the drilling monitoring data; and generating risk prediction information and drilling parameter optimization information of the drilling working condition according to the drilling monitoring data.

8. A method for increasing production of oil and gas drilling by using the system for increasing production of oil and gas drilling according to any one of claims 5 to 7, comprising:

A. preparing the construction of an aboveground drilling control subsystem;

9. The oil and gas drilling stimulation and production combined operation method according to claim 8, characterized in that the drilling medium comprises a drilling fluid and a pad fluid;

10. The oil and gas drilling production increase co-operation method according to claim 8, further comprising: