CN109025821A - A kind of high build angle rate rotary steering drilling tool of mixed type - Google Patents

Abstract

A hybrid high-deflection-rate rotary steerable drilling tool, which consists of two parts: a modulating push-on steering drilling sub-section and a hydraulic push-on pointing tool sub-section; when in use, the turbine torque motor is driven to change the acting torque so that the upper The disc valve is stable or moving; when all the acting moments of the stabilizing platform are balanced, the stabilizing platform will be relatively stable on the ground, so that the mud passing through the lower disc valve and the drilling fluid flow channel pushes against the ribs and always protrudes at the same position. Push against the well wall to achieve the purpose of deflection; the rotational torque of the drill collar is transmitted to the drill bit through the control shaft, which drives the drill bit to rotate and break rocks; the present invention has the advantages of realizing a high deflection rate rotary steerable drilling tool and high promotion value.

Description

A Hybrid High Build-Up Rate Rotary Steerable Drilling Tool

technical field

The invention belongs to the field of petroleum drilling engineering, and in particular relates to a hybrid high-deflection rate rotary steerable drilling tool.

Background technique

In order to meet the requirements of the exploration and development of oil and gas resources, especially the development of offshore oil and gas resources, as well as the drilling of ultra-deep wells, high-difficulty directional wells, cluster wells, horizontal wells, extended-reach wells, branch wells and three-dimensional complex structure wells in complex oil and gas reservoirs in the later stages of oil fields and other special techniques Well development requirements, but also to meet the needs of closed-loop automatic drilling development, an urgent need for a high build-up rate of rotary steerable drilling tools.

Rotary steerable drilling technology can not only solve the drilling technical problems faced by extended-reach wells and other complex structural wells during the drilling process, reduce development costs, but also achieve the purpose of increasing oil production. Rotary steerable drilling technology is one of the important bases to show the level of drilling engineering automation technology of a country or group.

The rotary steerable drilling tool is the core of the rotary steerable drilling system. According to its working mode, there are four main types: static pushing type, static pointing type, dynamic pushing type and dynamic pointing type. The drill bit of the push-on rotary steerable drilling tool has a large lateral force and a high build-up rate, but the hole drilled by the rotary steerable has a large dog-leg, and the trajectory fluctuates greatly and is not smooth. The pointing rotary steerable downhole tool bit has small lateral force and low build-up rate, but the hole doglegs drilled by rotary steerable are small and the trajectory is gentle. From the perspective of application, pointing is the development trend of rotary steerable drilling system. At present, the more mature rotary steerable drilling tools in foreign countries are mainly the Auto Track series of Baker Hughes, the Power Drive series of Schlumberger Company, and the Geo-Pilot series of Halliburton Company. The AutoTrack of Baker Hughes is a typical push tool. Its "drive shaft-non-rotating sleeve" structure conducts steering operations by controlling the magnitude and direction of the resultant force of the thrust block on the non-rotating sleeve acting on the well wall (refer to patent documents W02008101020A, US2013256034A etc.). And the typical drill pointing type rotary steerable tool such as Geo-Pilot (referring to patent document W02014055068A) of Halliburton Company, Revolution (referring to patent document W02008120025A) of Weatherford Company and Power Drive Xceed (referring to patent document W02008120025A) of Schlumberger Company Document N020061119A) etc. Among them, Geo-Pilot and Revolution are static pointing rotary steering tools. The tool's deflection capability is realized by adjusting the offset displacement of the downhole steering tool, and it can be continuously adjusted. The Power Drive Xceed of the "full rotation" structure adopts a fixed steering bias structure, and its build-up rate is realized through alternately changing steering and stabilizing drilling modes, depending on the conduction parameters (tool face and steering ratio) of the ground system. Take control.

Both the push-to-push type and the point-to-point type have their own advantages and disadvantages, and the structure of a single type cannot well meet the requirements of high-deflection drilling. Therefore, the combination of the two can effectively avoid the shortcomings of a single type, and the hybrid structure has become the current trend. Domestic research in this area started relatively late, and high-deflection rotary steerable drilling tools that can be successfully commercialized have not yet been developed. The "Dynamic Directional Rotary Steering Drilling Tool and Its Measurement and Control Method" (authorized announcement number CN 104832088 B) invented by Geng Yanfeng et al. uses a double eccentric ring mechanism for deflection, and has a complex structure; Tang Xueping et al. invented "a fully rotating Pointing Guidance Tool and Guidance Method” (Authorization Notice No. 104499940 B), aiming at the shortcomings of Schlumberger’s PowerDrive Xceed full-rotation directional guidance tool, an improved full-rotation directional guidance tool is proposed; Zhang Xiaoguang et al. The "static pointing rotary steering drilling tool" (authorized notification number CN 104775757 B) invented by people, its upper part is a static structure that does not rotate; the "pointing rotary steering drilling tool" invented by Li Hongtao and others (authorized notification number CN 104343389 B), the integrated hydraulic cylinder is used to realize the offset of the mandrel, and then build up the deflection. This invention only includes the pointing of the drill bit to generate the deflection; the "push and pointing rotary steering drilling device" invented by Zhang Ce (authorized announcement number CN 103437704 B) ), using the connection structure between the stabilizer and the hydraulic system, the stabilizer is a non-rotating device, and only the pointing part of the drill bit is used for deflection.

This patent proposes a hybrid high-deflection-rate rotary-steering drilling tool structure, which includes both push-and-push and pointing-type structures. The two structures are combined to provide a strong guarantee for the realization of high-deflection rate rotary-steering drilling tools.

Contents of the invention

In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a hybrid high build-up rate rotary steerable drilling tool, which includes both the modulated pushing type and the drill bit pointing type. Drilling tools provide a strong guarantee and have high promotional value.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A hybrid high deflection rate rotary steerable drilling tool, including a drill collar 17, a stable platform is arranged inside the drill collar 17, the stable platform includes a measurement and control electronic cabin 3, and the measurement and control electronic cabin 3 passes through the upper support bearing 21 and the lower support bearing 22 is fixed in the drill collar 17, the measurement and control electronic cabin 3 is connected to the turbine torque motor 2 and the turbine generator 1 through the control spindle, the output shaft of the turbine torque motor 2 is connected to the upper disc valve 4, and one side of the upper disc valve 4 is provided with drilling fluid distribution 5, the lower plate valve on the drilling fluid distributor 5 that cooperates with the upper plate valve 4 is connected to the push rib 7 through the connecting pipe, and the push rib 7 is arranged outside the drill collar 17, and the drilling fluid distributor 5 is uniformly arranged The main liquid channel 6; the upper disc valve 4 is connected to the main upper disc valve 9 through the disc valve connecting rod 8, and the disc valve connecting rod 8 passes through the drilling fluid distributor 5; the main upper disc valve 9 is provided with a diversion hole, and the main upper disc valve 9 One side of the valve 9 is provided with a hydraulic push against pointing tool nipple.

The hydraulic thrust pointing tool nipple includes a main drilling fluid throttling distributor 10, and the main drilling fluid throttling distributor 10 is provided with a plurality of evenly distributed overflow water holes; the drilling fluid throttling distributor 10 The middle connection on one side is the hydraulic pushing cup 11, and the hydraulic pushing cup 11 is connected to the control shaft 13. The control shaft 13 is provided with a lateral flow hole 12, and the control shaft 13 is fixed on the drill collar through a universal joint 14. 17, the control shaft 13 ends are connected to the drill bit 16.

The diversion hole on the main upper disc valve 9 is crescent-shaped.

The hydraulic push against the cup tube 11 is in the shape of a round cup.

The control shaft 13 passes through the flexible variable diameter joint 15, the control shaft 13 is connected to the flexible variable diameter joint 15 through the internal thread 18, the flexible variable diameter joint 15 is connected to the inner layer of the drill collar 17 through the external thread 19, and the control shaft 13 is connected to the inner layer of the drill collar 17 through the thread 20 Attach drill bit 16.

The upper end of the drill collar 17 is provided with a centralizer.

Beneficial effects of the present invention:

The present invention adopts the drive turbine torque motor 2 to change the acting torque, so that the upper plate valve 4 is stable or moves; when all the acting moments of the stabilizing platform are balanced, the stabilizing platform will be relatively stable (does not rotate), so that the valve 4 will pass through the lower plate The valve 5 and the mud of the drilling fluid channel 6 push against the rib plate 7 and always protrude and push against the well wall at the same position, so as to achieve the purpose of deflection; the rotational moment of the drill collar 17 is transmitted to the well through the control shaft 13. The drill bit 16 drives the drill bit 16 to rotate and break rocks.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic diagram of a drill collar, a flexible variable diameter short joint, a control shaft and a drill bit of the present invention.

Fig. 3 is a cross-sectional view of the force of hydraulic pushing against the cup tube of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

With reference to Fig. 1 shown, a kind of hybrid type high deflection rate rotary steerable drilling tool comprises drill collar 17, and the upper end of described drill collar 17 is provided with centralizer, and drill collar 17 is provided with stabilizing platform, and described stabilizing platform Including the measurement and control electronic cabin 3, the measurement and control electronic cabin 3 is fixed in the drill collar 17 through the upper support bearing 21 and the lower support bearing 22, the measurement and control electronic cabin 3 is connected to the turbine torque motor 2 and the turbine generator 1 through the control spindle, and the turbine torque motor 2 The output shaft is connected to the upper disc valve 4, and a drilling fluid distributor 5 is installed on one side of the upper disc valve 4, and the lower disc valve on the drilling fluid distributor 5 that cooperates with the upper disc valve 4 is connected to the rib plate 7 through a connecting pipe, and pushes against the rib plate 7. The ribs 7 are arranged outside the drill collar 17, and the main drilling fluid channel 6 is evenly arranged on the drilling fluid distributor 5; the upper disc valve 4 is connected to the main upper disc valve 9 through the disc valve connecting rod 8, and the disc valve connecting rod 8 passes through the drilling fluid The distributor 5; the main upper disc valve 9 is provided with a diversion hole, and one side of the main upper disc valve 9 is provided with a hydraulic pushing pointing tool nipple.

The hydraulic thrust pointing tool nipple includes a main drilling fluid throttling distributor 10, and the main drilling fluid throttling distributor 10 is provided with a plurality of evenly distributed overflow water holes; the drilling fluid throttling distributor 10 The middle connection on one side is the hydraulic pushing cup 11, and the hydraulic pushing cup 11 is connected to the control shaft 13. The control shaft 13 is provided with a lateral flow hole 12, and the control shaft 13 is fixed on the drill collar through a universal joint 14. 17, the control shaft 13 ends are connected to the drill bit 16.

2, the control shaft 13 passes through the flexible variable diameter joint 15, the control shaft 13 is connected to the flexible variable diameter joint 15 through the internal thread 18, and the flexible variable diameter joint 15 is connected to the inner layer of the drill collar 17 through the external thread 19, The control shaft 13 is connected to the drill bit 16 via a thread 20 .

Referring to Fig. 3, the hydraulic pushing cup 11 is in the shape of a round cup, and when the main upper disc valve 9 maintains a fixed angle, the jet impact force generated by the hydraulic pushing against the cup 11 remains at a fixed position all the time.

Working principle of the present invention:

When in use, the power source of the stable platform is provided by the upper turbine generator 1, and the measurement and control electronic cabin 3 completes the collection and processing of the information near the drill bit and generates corresponding control signals, thereby driving the turbine torque motor 2 to change the acting torque, so that the control shaft of the stable platform is connected The upper disc valve 4 is stable or moving; when all the acting moments of the stable platform are balanced, the stable platform will be relatively stable (without rotating motion), so that the mud passing through the drilling fluid distributor 5 and the drilling fluid channel 6 will push The pushing rib 7 always protrudes at the same position and pushes against the well wall, so as to achieve the purpose of deflection; the drill bit 16 is connected with the flexible variable diameter joint 15, and the drill bit 16 is connected with the control shaft 13 through the thread 20, and is connected with the control shaft 13 deflects and rotates, and communicates with the drilling fluid channel of the control shaft; the flexible reducing joint 15 is connected with the drill collar 17 through the external thread 19, and is connected with the control shaft 13 through the internal thread 18 at the same time, so as to pass the rotational moment of the drill collar 17 through The control shaft 13 is transmitted to the drill bit 16 to drive the drill bit 16 to rotate and break rocks;

The main upper disk valve 9 is connected with the stable platform through the disk valve connecting rod 8, and moves together with the stable platform or is relatively static. The main upper disc valve 9 is a disc with a crescent-shaped diversion hole on it. The main drilling fluid throttling distributor 10 is matched with the main upper plate valve 9, and the main drilling fluid throttling distributor 10 is provided with several evenly distributed overflow water holes. The water force pushes against the cup tube 11 and is in the shape of a round cup. When the overflow water hole communicates with the diversion hole of the main upper plate valve, the drilling fluid flows into the passage of the overflow water eye, and then is sprayed out from the jet nozzle, and the impact hydraulic force pushes against the cup tube 11 to form a jet impact force, causing the control shaft 13 to deflect , thus forming a guiding force (creeping force). When the main upper disc valve 9 maintains a fixed angle, the jet impact force generated by the hydraulic push against the cup tube 11 is always kept at a fixed position, so that the center line of the control shaft 13 remains deviated from the center line of the drill collar 17, and the control shaft 13 passes through The universal joint 14 drives the drill bit 16, so that the drill bit 16 always cuts the wellbore obliquely at the same angular position. The cumulative effect is to create a wellbore with a certain inclination increment, which is used for "incremental deflection" or "deflection building". "drilling; when the main upper disk valve 9 rotates at a constant speed relative to the ground, the drill bit 16 cuts the well wall uniformly and obliquely everywhere, and its cumulative effect is to keep the center of the wellbore stable, but it has a certain hole reaming effect, which is "stabilized inclination" drilled into.

Claims (6)

1. a kind of high build angle rate rotary steering drilling tool of mixed type, including drill collar (17), which is characterized in that set in drill collar (17) It is equipped with stabilized platform, the stabilized platform includes observing and controlling electronic compartment (3), and observing and controlling electronic compartment (3) passes through upper spring bearing (21) It is fixed in drill collar (17) with lower supporting bearing (22), observing and controlling electronic compartment (3) passes through control main shaft connection turbine torque motor (2) With turbogenerator (1), drilling well is arranged in the side of moushroom valve (4) in the output axis connection of turbine torque motor (2), upper moushroom valve (4) Liquid distributor (5) connect backup floor by connecting tube with the lower moushroom valve of upper moushroom valve (4) cooperation on drilling fluid distributor (5) (7), backup floor (7) setting is external in drill collar (17), is uniformly arranged drilling fluid sprue (6) on drilling fluid distributor (5)；On Moushroom valve (4) passes through drilling fluid distributor (5) by moushroom valve connecting rod (8) connection Your Majesty's moushroom valve (9), moushroom valve connecting rod (8)；Your Majesty's moushroom valve (9) deflector hole is provided on, the side of Your Majesty's moushroom valve (9) is provided with waterpower backup directional type tool pipe nipple.

2. the high build angle rate rotary steering drilling tool of a kind of mixed type according to claim 1, which is characterized in that described Waterpower backup directional type tool pipe nipple includes main drill-in fluid throttling distributor (10), and main drill-in fluid throttling distributor (10) is provided with Multiple equally distributed overcurrent hydrophthalmias；The intermediate of drilling fluid throttling distributor (10) side connects waterpower backup cup cylinder (11), water It pushes and is provided with lateral flowing hole (12) in cup cylinder (11) connection control shaft (13), control shaft 13, control shaft (13) passes through ten thousand It is fixed in drill collar (17) to section (14), control shaft (13) end connects drill bit (16).

3. the high build angle rate rotary steering drilling tool of a kind of mixed type according to claim 2, which is characterized in that described Waterpower backup cup cylinder (11) is in round cup shape tubular.

4. the high build angle rate rotary steering drilling tool of a kind of mixed type according to claim 2, which is characterized in that described Control shaft (13) passes through flexible reducing joint (15), and control shaft (13) connects flexible reducing joint (15) by internal screw thread (18), Flexible reducing joint (15) connects drill collar (17) internal layer by external screw thread (19), and control shaft (13) connects drill bit by screw thread (20) (16)。

5. the high build angle rate rotary steering drilling tool of a kind of mixed type according to claim 1, which is characterized in that described Deflector hole on Your Majesty's moushroom valve (9) is crescent shape.

6. the high build angle rate rotary steering drilling tool of a kind of mixed type according to claim 1, which is characterized in that described The upper end of drill collar (17) is provided with centralizer.