CN219864965U - Choke adjusting device suitable for wellhead automatic oil extraction - Google Patents

Abstract

The utility model relates to a choke plug adjusting device suitable for wellhead automatic oil extraction, which comprises a three-way pipe fitting with a main pipe, wherein an adjusting structure for adjusting oil flow is arranged in the main pipe, the adjusting structure comprises an adjusting cylinder with the outer diameter smaller than the inner diameter of the main pipe, one end of the adjusting cylinder is communicated with a choke plug, the other end of the adjusting cylinder is provided with a choke plug, the choke plug and the choke plug are attached to the side wall of the main pipe, a cavity and an annulus are formed by surrounding, the side surface of the adjusting cylinder is provided with a plurality of adjusting holes, a guide cylinder is arranged in a sliding manner, the guide cylinder comprises a large-diameter section and a small-diameter section with an oil hole on the side surface, the small-diameter section is arranged close to the choke plug and is connected with a rod body penetrating through the choke plug, the rod body is connected with a hydraulic cylinder, and a hydraulic pump of the hydraulic cylinder is electrically connected with a controller which is electrically connected with an oil pressure sensor for monitoring wellhead oil pressure. According to the oil pressure regulating device, the oil flow is regulated according to the oil pressure, the production pressure difference is controlled, the oil nozzle does not need to be frequently replaced, the influence on the production aging of an oil well is reduced, the oil flow needs to be turned for multiple times, and the flushing force on the oil nozzle can be reduced.

Description

Choke adjusting device suitable for wellhead automatic oil extraction

Technical Field

The utility model relates to the field of oil pressure regulation, in particular to a choke regulating device suitable for wellhead automatic oil extraction.

Background

In order to comprehensively reduce the pumping and spraying risks of a gas injection well and a self-blowing well in a machine extraction stage after the pumping and spraying, accelerate the automatic oil extraction process, reduce the labor cost, improve the oil extraction and gathering and transportation safety, timely stop the pumping unit and enable the pumping unit to be in a braking state when the pressure of a wellhead exceeds an early warning pressure value, simultaneously close a semi-sealing flashboard of a blowout preventer so as to prevent pumping and spraying, ensure the safety of the wellhead, reduce the well control risk, prevent the occurrence of the problems of pipe manifold piercing and leakage, ensure the safety of the safety production and the pressure of oil entering a station and ensure the safety of an oil transportation pipeline and a station device.

At present, in order to control the production pressure difference and a reasonable working system in the oil extraction process of an oil well, an oil nozzle is usually arranged in an oil nozzle sleeve of a christmas tree or an oil outlet pipeline, and the oil nozzle is required to be frequently replaced to control and adjust the production pressure difference and the yield of the oil well, so that the production pressure difference is reasonably adjusted, and the effective exploitation of the oil well productivity is realized. However, the operation process of replacing the oil nozzle is long, and the operation steps of replacing the oil nozzle are as follows: closing the well, releasing pressure, removing the plug (removing the clamp), installing the choke plug, installing the plug (installing the clamp), opening the well, and taking up 0.7 hour/well for the average choke plug to affect the production time efficiency of the oil well.

In addition, because the ejected fluid of the oil, gas and water well contains various impurities, under the severe changes of factors such as pressure, temperature and the like, the impurities can be coagulated and accumulated, so that the oil nozzle is easy to be blocked frequently, and meanwhile, the oil nozzle is large in thorn caused by sand flushing, so that the management of an oil well production plan is influenced. The existing oil nozzle sleeve is single in function and can only be used for loading and unloading oil nozzles, the fixed oil nozzle is installed in the oil nozzle sleeve, once wellhead pressure changes abnormally, the wellhead back pressure can be quickly increased due to untimely treatment, and production risks are brought to downstream station reservoirs.

Disclosure of Invention

The utility model solves the problems that when the production pressure difference and the output of well oil production are adjusted, a choke needs to be replaced, the working time of an oil well needs to be occupied, and the production of the oil well is influenced. In addition, after the oil flows in, the oil needs to turn for many times, and flows through the regulating hole, the oil hole and the middle hole of the guide cylinder to reach the oil nozzle, so that the effect of dispersing pressure can be achieved, the flushing of the oil nozzle by high-pressure oil liquid is lightened, the operation is simplified, and the production aging of an oil well can be prevented from being influenced.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

the utility model provides a be applicable to automatic oil recovery's of well head glib adjusting device, including a tee bend pipe fitting that has main pipe and branch pipe, tee bend pipe fitting's main pipe embeds the regulation structure that adjusts the fluid flow, the regulation structure includes a regulation section of thick bamboo coaxial and external diameter is less than main pipe internal diameter with the main pipe, the one end intercommunication of regulation section of thick bamboo has glib, the other end is equipped with the end cap, glib and the lateral surface of end cap are all laminated with the inside wall of main pipe to surround and form the cavity that is located regulation section of thick bamboo and be located between regulation section of thick bamboo lateral surface and main pipe inner wall and with the annular space that the branch pipe communicates, a plurality of regulation holes of arranging along self axis direction are offered to the side of regulation section of thick bamboo, still slide in the regulation section of thick bamboo and be equipped with the guide cylinder, the guide cylinder includes the major diameter section of thick bamboo that the lateral surface is laminated with the inside wall of regulation section of thick bamboo and is located the major diameter section towards the small diameter section of thick bamboo one end, the side of small diameter section of thick bamboo is offered the oilhole that is close to the end of end cap with the centre bore of guide cylinder, and be connected with a body of rod body along the axis of regulation section of thick bamboo and pass the end cap, and with the body of rod body;

the main pipe is also connected with a hydraulic cylinder, a piston rod of the hydraulic cylinder stretches out and draws back along the axial direction of the main pipe and is connected with one end of the rod body penetrating out of the plug, a hydraulic pump of the hydraulic cylinder is electrically connected with a controller, and the controller is electrically connected with an oil pressure sensor for monitoring wellhead oil pressure and transmitting wellhead oil pressure data to the controller in real time.

Preferably, the inner wall of the small-diameter section is provided with an internal thread, and the internal thread is matched with the rod body through threads, so that one end, close to the plug, of the middle hole of the small-diameter section is plugged.

Preferably, a connecting section is arranged at one end of the rod body far away from the guide cylinder, the connecting section comprises a positioning ball and a connecting column connected between the positioning ball and the rod body, and the diameter of the connecting column is smaller than that of the positioning ball; the piston rod of pneumatic cylinder is connected with a traction block, the side of traction block is offered and is used for supplying the linkage segment to slide into along the direction of perpendicular to body of rod axis along the horizontal direction setting dodges the groove, dodge the cross-section in groove and locating ball, spliced pole adaptation, and dodge the groove and draw the terminal surface intercommunication of piece towards the body of rod.

Preferably, the hydraulic cylinder is a double-rod hydraulic cylinder, the parts of the piston rod of the hydraulic cylinder, which are positioned at two ends, are respectively defined as a traction section and a monitoring section, and the traction block is connected to the end face of the traction section of the piston rod.

Preferably, the hydraulic cylinder is further connected with a reset cylinder sleeved on the outer side of the monitoring section, the reset cylinder and a piston rod of the hydraulic cylinder are coaxially arranged, the inner diameter of the reset cylinder is larger than the outer diameter of the piston rod, a positioning ring is further arranged on the side face of the monitoring section, a reset spring is further sleeved on the outer side of the monitoring section, one end of the reset spring is in butt joint with the positioning ring, and the other end of the reset spring is in butt joint with the end face of the hydraulic cylinder.

Preferably, two holes arranged along the axis direction of the resetting cylinder are formed in the side face of the resetting cylinder, a displacement sensor is arranged at the position of the hole, a mark for monitoring the displacement sensor is arranged on the outer side face of the monitoring section, and the two displacement sensors are also electrically connected with the controller.

Preferably, one end of the resetting cylinder is connected with the hydraulic cylinder, the other end of the resetting cylinder is connected with a transparent protective cap, and the inner wall of the transparent protective cap is always attached to a part of the side face of the monitoring section of the piston rod.

Preferably, the hydraulic cylinder comprises a cylinder body and a piston rod positioned in the cylinder body, a limiting sleeve is fixedly sleeved on the side surface of the piston rod, a limiting step which is abutted to the limiting sleeve is further arranged on the inner wall of the cylinder body, and the limiting step is positioned on one side of the limiting sleeve, facing the traction block.

Preferably, the aperture of the adjusting hole is gradually increased along the direction approaching the oil nozzle.

The technical scheme of the utility model has the beneficial technical effects that:

the branch pipe of the three-way pipe fitting is used as an oil inlet, and an annulus and a cavity communicated with the oil nozzle are formed by surrounding the oil nozzle, the plug, the adjusting cylinder and the main pipe of the three-way pipe fitting, and an adjusting hole formed in the inner wall of the adjusting cylinder is used for communicating the cavity with the annulus. And a guide cylinder is arranged in the adjusting cylinder in a sliding manner and can slide back and forth along the axial direction of the adjusting cylinder under the push-pull action of the hydraulic cylinder.

When the device works, the oil pressure sensor detects the oil pressure of the wellhead in real time, and transmits oil pressure data to the controller, the controller controls the hydraulic cylinder to stretch and retract to drive the guide cylinder to slide, the number of adjusting holes communicated between the cavity and the annulus is changed, the oil flow between the annulus and the cavity is adjusted, the production pressure difference is controlled, the problem of thorn leakage is avoided, the safe work of the oil nozzle adjusting device is ensured, the oil inlet pressure is controlled to be within an allowable range, and the oil nozzle is not required to be replaced frequently, so that the operation is simplified, and the production aging of an oil well is avoided being influenced.

In addition, oil can reach the oil nozzle only by flowing through the regulating hole, the oil hole and the middle hole of the guide cylinder in the flowing process, and the oil can turn for many times in the flowing process, so that the structure can play a role in dispersing pressure, reduce the scouring force of high-pressure oil to the oil nozzle and protect the oil nozzle

And (II) the side surface of the traction block is provided with an avoidance groove for the connecting section to slide in along the direction perpendicular to the axis of the rod body, the section of the avoidance groove is matched with the positioning ball and the connecting column, and after the connecting section slides into the avoidance groove, the piston rod of the hydraulic cylinder stretches out and draws back to drive the rod body and the guide cylinder to slide through the connecting section. Even the body of rod has taken place the deflection, locating ball, spliced pole also can keep the cooperation with dodging the groove, and the suitability is strong. When the hydraulic cylinder is required to be disassembled, the hydraulic cylinder and the traction block are only required to be offset along the horizontal direction, so that the traction block is separated from the connecting section, and the hydraulic cylinder is convenient to disassemble.

And thirdly, the limiting step is matched with the limiting sleeve, so that the sliding range of the piston rod can be limited, the guide cylinder is prevented from colliding with the oil nozzle when the piston rod slides towards the oil nozzle, and the oil nozzle is prevented from being damaged due to collision.

And fourthly, the displacement sensor monitors the marked position outside the monitoring section, can monitor the moving direction and the travel of the monitoring section of the piston rod, sends the monitored data to the controller, and the controller judges whether the operation of the oil cylinder needs to be adjusted.

Fifthly, along the direction close to the oil nozzle, the aperture of the regulating hole is gradually increased, when the flow rate of oil needs to be increased, the aperture of the regulating hole which is sequentially restored to be smooth is gradually increased in the process that the guide cylinder slides towards the oil nozzle, so that the flow rate of the oil can be rapidly increased, the oil pressure can be effectively reduced, and the problem that the oil nozzle is impacted or is punctured and leaked due to the fact that the difference between the increased flow rate of the oil and the flow rate of crude oil is too large can be avoided; when the flow of oil is required to be reduced, the aperture of the adjusting hole which is blocked in sequence is gradually reduced in the process that the guide cylinder slides towards the plug, the amplitude of the flow of the oil is changed each time according to the size of the current flow of the oil, the amplitude of the flow of the oil is smaller each time along with the reduction of the flow of the oil, the accurate control of the flow of the oil can be conveniently performed, the liquid yield of an oil well is controlled, and the effect of balancing the pressure is achieved, so that the purpose of stable production is achieved.

Drawings

FIG. 1 shows a schematic diagram of a choke adjusting device suitable for wellhead automated oil recovery in an embodiment of the present utility model;

FIG. 2 is a schematic diagram showing the cooperation of an adjusting structure with a main pipe in an embodiment of the present utility model;

FIG. 3 shows a schematic diagram of a hydraulic cylinder in an embodiment of the utility model;

FIG. 4 is a schematic diagram showing the cooperation of the reset cylinder and the monitoring segment in an embodiment of the present utility model.

The reference numerals in the drawings:

1-a main pipe; 11-branch pipes; 12-a limit seat; 13-annulus; 2-adjusting the cylinder; 21-adjusting holes; 22-oil nozzle; 23-plugs; 24-cavity; 3-a guide cylinder; 31-large diameter section; 32-small diameter section; 33-oil holes; 34-rod body; 341-a positioning ball; 342-connecting column; 4-a hydraulic cylinder; 41-a hydraulic pump; 42-a piston rod; 421-traction section; 422-traction block; 423-avoiding grooves; 424-monitoring segment; 425-a cylinder; 426—a locking cylinder; 427-retaining ring; 428-stop collar; 429-thread sleeve; 43-limiting steps; 5-resetting the cylinder; 51-a return spring; 52-a transparent protective cap; 6-a controller; 61-an oil pressure sensor; 62-displacement sensor.

Detailed Description

In order to make the objects, technical schemes and advantages of the utility model more clear, the utility model provides a nozzle adjusting device suitable for wellhead automatic oil extraction, which is further described in detail below with reference to the accompanying drawings and the detailed description. The advantages and features of the present utility model will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for the purpose of facilitating and clearly aiding in the description of embodiments of the utility model. For a better understanding of the utility model with objects, features and advantages, refer to the drawings. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that any modifications, changes in the proportions, or adjustments of the sizes of structures, proportions, or otherwise, used in the practice of the utility model, are included in the spirit and scope of the utility model which is otherwise, without departing from the spirit or essential characteristics thereof.

Examples

The technical solution of the choke adjusting device for wellhead automatic oil extraction according to the present utility model will be described in detail with reference to fig. 1 to 4 and the specific embodiments.

As shown in fig. 1 to 4, the choke adjusting device suitable for wellhead automatic oil extraction in this embodiment includes a three-way pipe fitting having a main pipe 1 and a branch pipe 11, the main pipe 1 of the three-way pipe fitting is internally provided with an adjusting structure for adjusting oil flow, the adjusting structure includes a choke plug 22 and a choke plug 23 attached to the inner side wall of the main pipe 1, the choke plug 22 and the choke plug 23 are respectively located at two ends of the main pipe 1, and a step surface is further processed on the outer side surface of the choke plug 22, so that the outer diameter of a part of the choke plug 22 away from the choke plug 23 is reduced. The one end of the main pipe 1 provided with the oil nozzle 22 is also bolted with an annular limiting seat 12, the inner diameter of the limiting seat 12 is smaller than that of the main pipe 1, and the end surface of the limiting seat 12 close to the main pipe 1 abuts against the step surface of the oil nozzle 22 to prevent the oil nozzle 22 from falling off from the main pipe 1. An adjusting cylinder 2 with an axis coincident with the axis of the main pipe 1 and an outer diameter smaller than the inner diameter of the main pipe 1 is further arranged between the oil nozzle 22 and the plug 23, one end of the adjusting cylinder 2 is communicated with the oil nozzle 22, the other end of the adjusting cylinder is plugged by the plug 23, the area enclosed between the outer side surfaces of the oil nozzle 22 and the plug 23 and the inner side wall of the main pipe 1 is divided into a cavity 24 positioned in the adjusting cylinder 2 and an annular space 13 positioned between the outer side surface of the adjusting cylinder 2 and the inner wall of the main pipe 1 by the adjusting cylinder 2, and the annular space 13 is communicated with the branch pipe 11. Five adjusting holes 21 are also formed in the side face of the adjusting cylinder 2, the adjusting holes 21 are uniformly arranged along the axial direction of the adjusting cylinder 2, and when oil is extracted from an oil well, oil flows into the annular space 13 from the branch pipe 11, then passes through the adjusting holes 21 and enters the cavity 24.

The guide cylinder 3 is further arranged in the adjusting cylinder 2 in a sliding manner, the guide cylinder 3 comprises a large-diameter section 31 and a small-diameter section 32 which are integrally formed, the outer side face of the large-diameter section 31 is attached to the inner side wall of the adjusting cylinder 2, the small-diameter section 32 is located at one end of the large-diameter section 31, which faces the plug 23, a middle hole of the small-diameter section 32 is close to one end of the plug 23 and is connected with a rod body 34, and the rod body 34 penetrates through the plug 23 along the axis of the adjusting cylinder 2 and is in sliding fit with the plug 23. In addition, an oil hole 33 communicating with the middle hole of the guide cylinder 3 is further formed on the side surface of the small diameter section 32, and the oil entering the cavity 24 can flow into the middle hole of the guide cylinder 3 from the oil hole 33 and then flow to the oil nozzle 22 from the guide cylinder 3.

The one end that is responsible for 1 and is kept away from spacing seat 12 still the bolt has a pneumatic cylinder 4, the axis coincidence of the piston rod 42 axis of pneumatic cylinder 4 and the axis of being responsible for 1, and the piston rod 42 of pneumatic cylinder 4 is connected with the one end that the end cap 23 was worn out to body of rod 34, thereby when pneumatic cylinder 4 operates, drive body of rod 34 and draft tube 3 and slide along the axis direction of adjusting tube 2, when the major diameter section 31 of draft tube 3 slides and passes through regulation hole 21, can shelter from regulation hole 21, thereby change the quantity of the regulation hole 21 of intercommunication between cavity 24 and the annular space 13, be equivalent to the channel sectional area of the intercommunication between change cavity 24 and the annular space 13, and then can change the fluid flow between cavity 24 and the annular space 13. In addition, the hydraulic cylinder 4 is equipped with a hydraulic pump 41, a controller 6 is electrically connected to a control circuit of the hydraulic pump 41, and an oil pressure sensor 61 for monitoring the oil pressure of the wellhead and transmitting the data of the oil pressure of the wellhead to the controller 6 in real time is electrically connected to the controller 6, and a PLC controller is selected as the controller 6 in this embodiment. When the oil well works, the oil pressure sensor 61 detects the oil pressure of the wellhead in real time, oil pressure data are transmitted to the controller 6, the controller 6 controls the hydraulic pump 41 to work, the hydraulic cylinder 4 stretches and drives the guide cylinder 3 to slide, the number of the regulating holes 21 communicated between the cavity 24 and the annulus 13 is changed, the oil flow between the annulus 13 and the cavity 24 is regulated, the pressure of the oil is influenced, the production pressure difference is controlled, the problem of puncture leakage is avoided, the safe work of the oil nozzle 22 regulating device is ensured, the oil inlet pressure is controlled within an allowable range, and the oil nozzle 22 does not need to be replaced, so that the operation is simplified, and the production timeliness of the oil well is avoided. The oil flows into the annular space 13 from the branch pipe 11 of the three-way pipe fitting, then flows into the cavity 24 through the regulating hole 21, and then flows into the middle hole of the guide cylinder 3 from the oil hole 33, so as to finally reach the oil nozzle 22.

Specifically, the aperture of the adjusting hole 21 is sequentially increased along the direction close to the oil nozzle 22, and the aperture of the adjusting hole 21 is sequentially increased along the direction close to the oil nozzle 22, when the flow rate of oil needs to be improved, the aperture of the adjusting hole 21 which is sequentially restored to be smooth is sequentially increased one by one in the process that the guide cylinder 3 slides towards the oil nozzle 22, so that the oil flow rate can be rapidly improved, the oil pressure is effectively reduced, the increase amount of the oil flow rate is increased along with the increase of the oil flow rate, the increase of the increased oil flow rate is kept in a reasonable range compared with the increase of the crude oil flow rate, the rapid change of the oil flow rate flowing through the oil nozzle 22 is not caused, and the problem of thorn leakage is reduced; when the flow of oil is required to be reduced, the aperture of the adjusting hole 21 which is sequentially blocked is gradually reduced in the process that the guide cylinder 3 slides towards the plug 23, the amplitude of the flow of the oil is changed each time according to the current flow of the oil, and the amplitude of the flow of the oil is smaller each time along with the reduction of the flow of the oil, so that the flow of the oil can be accurately controlled, the liquid yield of an oil well is controlled, the effect of balancing the pressure is achieved, and the purpose of stable production is achieved.

In this embodiment, the end faces of the choke plug 22 and the choke plug 23 facing the adjusting cylinder 2 are both formed with annular limiting cylinders, and the adjusting cylinder 2 is positioned by utilizing the limiting cylinder hoops outside the adjusting cylinder 2. The inner wall of the small diameter section 32 of the adjusting cylinder 2 is provided with internal threads, the side surface of the rod body 34, which is close to one end of the adjusting cylinder 2, is provided with external threads, the rod body 34 is in threaded fit with the small diameter section 32 of the adjusting cylinder 2, connection between the rod body 34 and the adjusting cylinder 2 is realized, the rod body 34 is inserted into the middle hole of the adjusting cylinder 2, and one end, which is close to the plug 23, of the middle hole of the small diameter section 32 can be plugged. In addition, it should be noted that the rod 34 should not block the oil hole 33, in this embodiment, because the position of the rod 34 screwed in is deeper, the oil hole 33 is blocked, so a blind hole corresponding to the position of the oil hole 33 is further formed in the side surface of the rod 34, a through hole is further formed between the side wall of the blind hole and the end surface of the rod 34 facing the oil nozzle 22, and the oil entering the cavity 24 can flow through the blind hole and the through hole, and enter the middle hole of the adjusting cylinder 2.

In this embodiment, a connecting section is integrally formed at one end of the rod body 34 far away from the guide cylinder 3, the connecting section includes a positioning ball 341 and a connecting post 342 connected between the positioning ball 341 and the rod body 34, the connecting post 342 is cylindrical, the axis of the connecting post 342 and the axis of the positioning ball 341 are both coincident with the axis of the rod body 34, and the diameter of the connecting post 342 is smaller than the diameter of the positioning ball 341. The hydraulic cylinder 4 comprises a cylinder body and a piston rod 42 positioned in the cylinder body, the piston rod 42 of the hydraulic cylinder 4 is connected with a traction block 422, the side surface of the traction block 422 is provided with an avoidance groove 423 used for a connecting section to slide in along the direction perpendicular to the axis of the rod body 34, and the section of the avoidance groove 423 is matched with the positioning ball 341 and the connecting column 342. The avoiding groove 423 in this embodiment includes a wide groove section adapted to the positioning ball 341 and a narrow groove section adapted to the connecting post 342, and the narrow groove section is connected between the wide groove section and an end face of the traction block 422 facing the rod body 34. When the connecting section is connected with the piston rod 42 of the hydraulic cylinder 4, the hydraulic cylinder 4 is only required to be controlled to move along the direction perpendicular to the axis of the rod body 34, so that the connecting section slides in from the notch of the avoidance groove 423, the width of the narrow groove section is insufficient for the positioning ball 341 to slide, and when the piston rod 42 of the hydraulic cylinder 4 stretches and contracts, the positioning ball 341 cannot pass through the narrow groove section of the avoidance groove 423, so that the connecting section can be pushed and pulled by the traction block 422 to reciprocate, and the rod body 34 is driven to slide reciprocally. When the hydraulic cylinder 4 is disassembled, the hydraulic cylinder 4 can be directly controlled to move along the direction perpendicular to the axis of the rod body 34, so that the traction block 422 can be separated from the connecting section, and the disassembly is convenient.

It will be appreciated that the contact surfaces within the main pipe 1 that need to be kept sealed may be sealed using a sealing element, such as an annular groove in the outer side of the guide shell 3 and a sealing ring placed in the annular groove as a sealing element. In addition, when the connecting section is matched with the avoidance groove 423 of the traction block 422, the avoidance groove 423 can also restrict the connecting section and adjust the balance of the rod body 34, so that the axes of the rod body 34 and the guide cylinder 3 are kept coincident with the axis of the adjusting cylinder 2, the problem of eccentric wear is prevented, and the wear speed of the sealing element in the main pipe 1 is delayed.

In this embodiment, an internal thread cylinder is integrally formed at one end of the hydraulic cylinder 4 near the plug 23, an annular groove is formed at one end of the outer side of the plug 23 near the hydraulic cylinder 4, an external thread is machined on the groove wall of the annular groove, the plug 23 is in threaded connection with the internal thread cylinder, a thread sleeve 429 is further in threaded connection with the outer side surface of the hydraulic cylinder 4, the thread sleeve 429 is in bolting with the end face of the main pipe 1 of the three-way pipe fitting, and therefore the hydraulic cylinder can be conveniently detached and the plug 23 can be positioned.

Further, a limiting sleeve 428 is fixedly sleeved on the side face of the piston rod 42, a limiting step 43 which is abutted to the limiting sleeve 428 is further arranged on the inner wall of the cylinder body, the limiting step 43 is located on one side of the limiting sleeve 428, which faces the traction block 422, the limiting step 43 is matched with the limiting sleeve 428, the sliding range of the piston rod 42 can be limited, the collision between the guide cylinder 3 and the oil nozzle 22 when the piston rod 42 slides towards the oil nozzle 22 is avoided, and the oil nozzle 22 is prevented from being damaged due to collision. In this embodiment, the hydraulic cylinder 4 is a dual-rod hydraulic cylinder 4, the portions of the piston rod 42 of the hydraulic cylinder 4 at two ends are respectively defined as a traction section 421 and a monitoring section 424, the traction section 421 and the monitoring section 424 respectively extend out from two ends of the hydraulic cylinder 4 body, and the traction block 422 is connected to the end face of the traction section 421 of the piston rod 42 in a threaded fit manner. While the portion of the monitoring segment 424 extending from the cylinder may be used to provide a person with knowledge of the change in travel of the piston rod 42, thereby allowing for targeted adjustment of the hydraulic pump 41. The monitoring section 424 in this embodiment actually further includes a section of rod structure in threaded connection with the piston rod 42, and the section of rod structure is integrally connected with the piston rod and moves synchronously, so that the section of rod structure can be regarded as a part of the piston rod 42, and of course, the longer hydraulic cylinder 4 of the piston rod 42 can also be directly selected, and the travel change of the monitoring section can be observed without connecting another section of rod structure.

Further, the hydraulic cylinder 4 is further connected with a reset cylinder 5 sleeved outside the monitoring section 424, the reset cylinder 5 is coaxially arranged with the piston rod 42 of the hydraulic cylinder 4, the inner diameter of the reset cylinder 5 is larger than the outer diameter of the piston rod 42, the side face of the monitoring section 424 is further connected with a positioning ring 427, the monitoring section 424 is sleeved with a reset spring 51 in a compressed state, one end of the reset spring 51 is abutted with the positioning ring 427, and the other end of the reset spring is abutted with the end face of the hydraulic cylinder 4. The return spring 51 is always in a compressed state, and the return spring 51 can push the monitoring section 424 and the piston rod 42 of the hydraulic cylinder 4 to move to a certain preset position, so that the return function of the piston rod 42 is realized.

In this embodiment, a cylinder 425 is further sleeved on the outer side of the monitoring section 424, a locking cylinder 426 is sleeved on the cylinder 425, locking rings are processed on edges of inner walls of two ends of the locking cylinder 426, the locking rings are fixed on inner walls of the cylinder 425 in a welding mode, protruding portions are formed on the outer side face of the cylinder 425, the locking cylinder 426 can prevent the protruding portions of the cylinder 425 from sliding out of the range of the locking cylinder 426 by means of the locking rings, and the cylinder 425 can be prevented from being separated from the locking cylinder 426.

Further, two holes arranged along the axial direction of the reset cylinder 5 are formed in the side surface of the reset cylinder 5, a displacement sensor 62 is mounted at the opening, a plurality of marks (not shown in the figure) for monitoring the displacement sensor 62 are processed on the outer side surfaces of the locking cylinder 426 and the monitoring section 424, the marks are arranged along the axial direction of the monitoring section 424, the two displacement sensors 62 are electrically connected with the controller 6, the displacement sensor 62 monitors the moving direction and the travel of the monitoring section 424 of the piston rod 42, monitored data are sent to the controller 6, and the controller 6 judges whether the telescopic direction and the distance of the oil cylinder need to be adjusted.

In this embodiment, one end of the reset cylinder 5 is bolted to the end face of the cylinder body of the hydraulic cylinder 4, the other end is in threaded connection with a transparent protective cap 52, and a containing groove for inserting the traction section 421 is formed in one end of the transparent protective cap 52 facing the hydraulic cylinder 4. The transparent protective cap 52 covers the end part of the monitoring section 424 of the piston rod 42 far away from the traction section 421, and in the telescopic process of the piston rod 42 of the hydraulic cylinder 4, a part of the traction section 421 is always positioned in the accommodating groove of the transparent protective cap 52, so that a worker can conveniently observe and know the position of the piston rod 42 from the transparent protective cap 52.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (9)

1. The utility model provides a be applicable to automatic oil recovery's of well head glib adjusting device, its characterized in that includes a tee bend pipe fitting that has main pipe and branch pipe, tee bend pipe fitting's main pipe embeds the regulation structure that adjusts the fluid flow, the regulation structure includes an adjustment section of thick bamboo coaxial and external diameter is less than the internal diameter of main pipe with the main pipe, the one end intercommunication of adjustment section of thick bamboo has glib, the other end is equipped with the end cap, glib and the lateral surface of end cap all laminate with the inside wall of main pipe to surround and form the cavity that is located adjustment section of thick bamboo and the annular space that is located between adjustment section of thick bamboo lateral surface and main pipe inner wall and communicates with the branch pipe, a plurality of regulation holes that arrange along self axis direction are offered to the side of adjustment section of thick bamboo, still slide in the adjustment section of thick bamboo and be equipped with the guide cylinder, the guide cylinder includes the major diameter section that the major diameter section of thick bamboo laminating towards end cap one end cap's side, the well bore of minor diameter section is offered with the oilhole that communicates with the centre bore of guide cylinder, the end cap is close to the centre bore of minor diameter section, and be connected with a body of rod, pass along the axis of adjustment section of thick bamboo and with the end cap and sliding fit;

the main pipe is also connected with a hydraulic cylinder, a piston rod of the hydraulic cylinder stretches out and draws back along the axial direction of the main pipe and is connected with one end of the rod body penetrating out of the plug, a hydraulic pump of the hydraulic cylinder is electrically connected with a controller, and the controller is electrically connected with an oil pressure sensor for monitoring wellhead oil pressure and transmitting wellhead oil pressure data to the controller in real time.

2. The choke plug adjusting device for wellhead automatic oil recovery according to claim 1, wherein the inner wall of the small-diameter section is provided with internal threads, and the internal threads are matched with the rod body through threads so as to seal one end of the middle hole of the small-diameter section, which is close to the plug.

3. The choke adjusting device for wellhead automatic oil recovery according to claim 1, wherein one end of the rod body far away from the guide cylinder is provided with a connecting section, the connecting section comprises a positioning ball and a connecting column connected between the positioning ball and the rod body, and the diameter of the connecting column is smaller than that of the positioning ball; the piston rod of pneumatic cylinder is connected with a traction block, the side of traction block is offered and is used for supplying the linkage segment to slide into along the direction of perpendicular to body of rod axis along the horizontal direction setting dodges the groove, dodge the cross-section in groove and locating ball, spliced pole adaptation, and dodge the groove and draw the terminal surface intercommunication of piece towards the body of rod.

4. A choke adjusting device for automatic wellhead oil recovery as claimed in claim 3 wherein the hydraulic cylinder is a double-rod hydraulic cylinder, the portions of the piston rod of the hydraulic cylinder at the two ends are respectively defined as a traction section and a monitoring section, and the traction block is connected to the end face of the traction section of the piston rod.

5. The choke adjusting device for wellhead automatic oil recovery according to claim 4, wherein the hydraulic cylinder is further connected with a reset cylinder sleeved on the outer side of the monitoring section, the reset cylinder is coaxially arranged with a piston rod of the hydraulic cylinder, the inner diameter of the reset cylinder is larger than the outer diameter of the piston rod, a positioning ring is further arranged on the side face of the monitoring section, a reset spring is further sleeved on the outer side of the monitoring section, one end of the reset spring is abutted to the positioning ring, and the other end of the reset spring is abutted to the end face of the hydraulic cylinder.

6. The choke adjusting device for automatic wellhead oil recovery according to claim 5, wherein two holes are formed in the side face of the reset cylinder and are arranged along the axis direction of the reset cylinder, displacement sensors are installed at the holes, marks for monitoring the displacement sensors are arranged on the outer side face of the monitoring section, and the two displacement sensors are electrically connected with the controller.

7. The choke adjusting device for automatic wellhead oil recovery according to claim 5, wherein one end of the reset cylinder is connected with the hydraulic cylinder, the other end of the reset cylinder is connected with a transparent protective cap, and the inner wall of the transparent protective cap is always attached to a part of the side face of the monitoring section of the piston rod.

8. The choke adjusting device for wellhead automatic oil extraction according to claim 1, wherein the hydraulic cylinder comprises a cylinder body and a piston rod positioned in the cylinder body, a limit sleeve is fixedly sleeved on the side surface of the piston rod, a limit step abutting against the limit sleeve is further arranged on the inner wall of the cylinder body, and the limit step is positioned on one side of the limit sleeve facing the traction block.

9. A choke adjusting device for automatic wellhead oil recovery as claimed in claim 1 wherein the aperture of the adjusting holes increases in sequence in the direction of approaching the choke.