A pressure-relieving oil wellhead

Abstract

The present invention discloses a pressure-relieving oil wellhead, which relates to the technical field of oil wells and includes a main body. A discharge assembly is arranged in the inner cavity of the main body, and the pressure in the oil well is discharged through the discharge assembly. In this pressure-relieving oil wellhead, when the connecting block moves, the movable rod arranged at its end is driven to move synchronously, and at the same time, the sealing block arranged on the movable rod is driven to move, so as to discharge the pressure inside the through hole. Among them, the connecting pipe conducts the pressure in the oil well to the inner wall of the through hole, and the reciprocating movable sealing block discharges the pressure in the through hole. And after discharging a part each time, the pressure in the oil well is detected again. If the detected pressure meets the requirement, the two sealing blocks are in the middle position, and then the connecting pipe is closed. If the detected pressure does not meet the requirement, the two sealing blocks continuously discharge the pressure until the qualified standard is reached and then stop.

Description

Technical Field

[0001] The present invention relates to oil well technology, and specifically relates to a pressure-relieving oil wellhead. Background Art

[0002] An oil well is inserted into the deep and ultra-deep layers of 3,500 to 4,500 meters underground to extract the oil hidden in the deep and ultra-deep layers underground. Oil is mainly used as fuel and gasoline, and is also a raw material for many chemical industrial products such as solutions, fertilizers, pesticides, and plastics. There is a large pressure in the oil well. If the pressure in the oil well cannot be released, it is easy to cause a blowout accident. A pressure-relieving oil well can release the pressure in the oil well to prevent a blowout accident caused by the inability to release the pressure in the oil well.

[0003] In the Chinese invention patent with the publication number CN115637947B, a pressure-relieving oil wellhead is disclosed. For this pressure-relieving oil wellhead, the present invention can insert two sealing plugs into two exhaust pipes respectively when the pressure-relieving oil well does not need to release pressure to seal the exhaust pipes, so as to achieve the purpose of sealing the pressure-relieving oil well. When the pressure-relieving oil well releases pressure, the gas discharged from the pressure-relieving oil well is filtered to prevent the oil impurities in the gas from entering the surrounding environment, improving the environmental protection of the pressure-relieving oil wellhead. And when the pressure in the pressure-relieving oil well cannot be relieved more effectively through the two exhaust pipes, the oil and pressure in the pressure-relieving oil well can be quickly transported to the pressure-relieving storage oil tank by opening the pressure-relieving oil pipe, so as to better control the pressure in the pressure-relieving oil well and improve the practicability and environmental protection of the pressure-relieving oil well.

[0004] When the existing equipment is in use, if the pressure relief valve is opened too much, it may cause the wellhead pressure to drop too low, which will affect the production efficiency of oil and gas or cause instability in wellhead control. If the pressure relief is incomplete, the wellhead pressure may still be too high, posing a risk of blowout. Therefore, a pressure-relieving oil wellhead has been developed. Summary of the Invention

[0005] The purpose of the present invention is to provide a pressure-relieving oil wellhead to solve the above deficiencies in the prior art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A pressure-relieving oil wellhead, including a main body, wherein a discharge assembly is arranged in the inner cavity of the main body, and the pressure in the oil well is discharged through the discharge assembly;

[0007] An adjusting assembly, which is assembled at the lower end of the discharge assembly, and the adjusting assembly is connected to the pipeline of the oil wellhead, and the rate of pressure discharge in the oil well is controlled through the adjusting assembly;

[0008] Among them, the discharge assembly includes a driving member connected to the inner wall of the main body, and the output end of the driving member is rotatably installed with two push rods through a crankshaft. At the same time, the two push rods are adjacently arranged on the outer surface of the crankshaft;

[0009] A fixed block is arranged on the inner wall of the main body and on one side of the driving member. Guide grooves are symmetrically opened at the upper end of the fixed block, and sliders are slidably installed on the inner walls of the guide grooves. One end of the slider is connected to the end of the push rod;

[0010] Protective rods are arranged at the opposite ends of the two sliders. At the same time, a driving rod is arranged at the end of the slider away from the push rod, a connecting block is arranged at the end of the driving rod, and one side of the connecting block is connected to the end of the protective rod;

[0011] A positioning block is arranged on the inner wall of the main body and on one side of the connecting block. Through holes are symmetrically opened in the inner wall of the positioning block, and sealing blocks are slidably installed on the inner walls of the through holes. An active rod is arranged at the end of the sealing block, and the end of the active rod away from the sealing block is connected to the end of the connecting block. At the same time, a connecting pipe is arranged at the lower end of the positioning block, and the connecting pipe is communicated with the through hole.

[0012] As a further optimized solution of the present invention, the adjusting assembly includes a docking cylinder connected to the connecting pipe. A bottom plate is arranged on the inner wall of the docking cylinder, and multiple groups of guide blocks are arranged at the end of the bottom plate, and the multiple groups of guide blocks are evenly distributed on the bottom plate.

[0013] An active block is slidably installed at the upper end of the guide block. At the same time, a limiting block is arranged at the upper end of the active block.

[0014] As a further optimized solution of the present invention, an adjusting rod is rotatably installed in the inner wall of the limiting block. At the same time, a limiting rod is rotatably installed at the lower end of the inner wall of the limiting block, and the upper end of the limiting rod is rotatably connected to the end of the adjusting rod.

[0015] As a further optimized solution of the present invention, a rotating block is rotatably installed at the lower end of the limiting rod, and the cross section of the rotating block is arc-shaped.

[0016] As a further optimized solution of the present invention, a sphere is arranged in the inner cavity of the docking cylinder. An arc-shaped groove corresponding to the rotating block is opened on the outer surface of the sphere, and the inner wall of the arc-shaped groove is slidably connected to the outer surface of the rotating block.

[0017] As a further optimized solution of the present invention, a turntable is rotatably installed at the upper end of the bottom plate. Multiple groups of driving grooves are opened at the end of the turntable, and the multiple groups of driving grooves are evenly distributed on the turntable.

[0018] As a further optimized solution of the present invention, a fixing plate is rotatably installed at the upper end of the turntable, and the outer surface of the fixing plate is connected to the bottom plate.

[0019] As a further optimized solution of the present invention, an adjustment groove corresponding to the driving groove is provided at the end of the fixing plate, a sliding rod is slidably installed on the inner wall of the adjustment groove, and at the same time, the end of the sliding rod is connected to the outer surface of the movable block.

[0020] As a further optimized solution of the present invention, a driving block is slidably installed on the inner wall of the driving groove, and the end of the driving block is connected to the outer surface of the sliding rod.

[0021] Compared with the prior art, a pressure relief type oil wellhead provided by the present invention has the following beneficial effects: when the connecting block moves, the movable rod arranged at its end is synchronously driven to move, and at the same time, the sealing block arranged on the movable rod is cooperated to move, so as to discharge the pressure inside the through hole. Among them, the connecting pipe conducts the pressure in the oil well to the inner wall of the through hole, and the pressure in the through hole is discharged by the reciprocating sealing block. And after discharging a part each time, the pressure in the oil well is detected again. If the detected pressure meets the standard, the two sealing blocks are in the middle position, and then the connecting pipe is closed. If the detected pressure does not meet the standard, the two sealing blocks continuously discharge the pressure until the qualified standard is reached and then stop.

[0022] When the rotating block moves, the sphere is synchronously driven to move. The outer surface of the rotating block is slidably connected to the inner wall of the arc groove, and at the same time, the rotating block is clamped on the inner wall of the arc groove, so that the sphere moves synchronously with the rotating block. And a sealing component such as rubber is arranged on the outer surface of the sphere, and the inner wall of the connecting pipe is sealed by the sphere, so as to control the distance between the sphere and the connecting pipe, and further control the pressure flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0024] Figure 1 It is the overall structural schematic diagram provided by the embodiment of the present invention;

[0025] Figure 2 It is the overall internal structural sectional view provided by the embodiment of the present invention;

[0026] Figure 3 It is the first sectional view of the internal structure of the discharge assembly provided by the embodiment of the present invention;

[0027] Figure 4 The second cross-sectional view of the internal structure of the discharge component provided by the embodiment of the present invention;

[0028] Figure 5 The schematic structural diagram of the adjustment component provided by the embodiment of the present invention;

[0029] Figure 6 The first cross-sectional view of the internal structure of the adjustment component provided by the embodiment of the present invention;

[0030] Figure 7 The second cross-sectional view of the internal structure of the adjustment component provided by the embodiment of the present invention;

[0031] Figure 8 The third cross-sectional view of the internal structure of the adjustment component provided by the embodiment of the present invention.

[0032] Explanation of reference numerals:

[0033] 1. Main body; 2. Discharge component; 3. Adjustment component; 21. Driving member; 22. Push rod; 23. Fixed block; 231. Guide groove; 24. Slide block; 241. Protection rod; 242. Driving rod; 25. Connecting block; 26. Movable rod; 27. Positioning block; 271. Through hole; 272. Connecting pipe; 28. Sealing block; 31. Docking cylinder; 32. Bottom plate; 321. Guide block; 322. Movable block; 33. Limiting block; 331. Adjusting rod; 34. Limiting rod; 341. Rotating block; 35. Sphere; 351. Arc groove; 36. Turntable; 361. Driving groove; 362. Driving block; 37. Fixed plate; 371. Adjusting groove; 372. Slide rod. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention; the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Embodiment: Please refer to Figures 1-8 , a pressure-relieving type oil wellhead, including a main body 1. A discharge assembly 2 is arranged in the inner cavity of the main body 1, and the pressure in the oil well is discharged through the discharge assembly 2.

[0037] In this solution, the main body 1 is used to wrap the discharge assembly 2 so that the inside of the discharge assembly 2 will not be bumped, and cooperate with the discharge assembly 2 to evenly discharge the pressure in the oil well to avoid excessive pressure relief.

[0038] Further, among them, the discharge assembly 2 includes a driving member 21 connected to the inner wall of the main body 1, and the output end of the driving member 21 is rotatably installed with two push rods 22 through a crankshaft, and the two push rods 22 are arranged adjacent to each other on the outer surface of the crankshaft.

[0039] In this embodiment, the driving member 21 is a device with power output such as a motor and is connected to an external control device. When the driving member 21 is started, it synchronously drives the crankshaft arranged at its output end to rotate. At the same time, when the crankshaft rotates, it drives the two push rods 22 arranged on its outer surface to move reciprocally.

[0040] Further, a fixing block 23 is arranged on the inner wall of the main body 1 and on one side of the driving member 21. Guide grooves 231 are symmetrically opened at the upper end of the fixing block 23, and a slider 24 is slidably installed on the inner wall of the guide groove 231. One end of the slider 24 is connected to the end of the push rod 22.

[0041] Specifically, when the push rod 22 moves, it synchronously drives the slider 24 arranged at its end to move. At the same time, the slider 24 is limited by the guide groove 231, so as to ensure that the slider 24 will not fall off during movement.

[0042] Further, protective rods 241 are provided at opposite ends of the two sliders 24. At the same time, drive rods 242 are provided at the ends of the sliders 24 away from the push rod 22. A connection block 25 is provided at the end of the drive rod 242, and one side of the connection block 25 is connected to the end of the protective rod 241.

[0043] Specifically, the protective rod 241 is a telescopic rod or other component with a telescopic function, so as to ensure the stability of the connection block 25 when the two sliders 24 move alternately, and when the slider 24 moves, it cooperates with the drive rod 242 to drive the connection block 25 to move.

[0044] Further, a positioning block 27 is provided on the inner wall of the main body 1 and on one side of the connection block 25. Through holes 271 are symmetrically opened on the inner wall of the positioning block 27. A sealing block 28 is slidably installed on the inner wall of the through hole 271, and a movable rod 26 is provided at the end of the sealing block 28. The end of the movable rod 26 away from the sealing block 28 is connected to the end of the connection block 25. At the same time, a connecting pipe 272 is provided at the lower end of the positioning block 27, and the connecting pipe 272 is communicated with the through hole 271.

[0045] Specifically, when the connection block 25 moves, it synchronously drives the movable rod 26 provided at its end to move, and at the same time cooperates with the sealing block 28 provided on the movable rod 26 to move, so as to discharge the pressure inside the through hole 271.

[0046] The connecting pipe 272 conducts the pressure in the oil well to the inner wall of the through hole 271. The pressure in the through hole 271 is discharged by the reciprocating sealing block 28. After discharging a part each time, the pressure in the oil well is detected again. If the detected pressure meets the standard, the two sealing blocks 28 are in the middle position, and then the connecting pipe 272 is closed. If the detected pressure does not meet the standard, the pressure is continuously discharged by the two sealing blocks 28 until the qualified standard is reached and then stopped.

[0047] Further, an adjusting assembly 3 is assembled at the lower end of the discharging assembly 2, and the adjusting assembly 3 is connected to the pipeline of the oil well head. The adjusting assembly 3 controls the discharging rate of the pressure in the oil well; the adjusting assembly 3 includes a docking cylinder 31 connected to the connecting pipe 272. A bottom plate 32 is provided on the inner wall of the docking cylinder 31. A plurality of guide blocks 321 are provided at the end of the bottom plate 32, and the plurality of guide blocks 321 are evenly distributed on the bottom plate 32. A movable block 322 is slidably installed on the upper end of the guide block 321, and a limiting block 33 is provided at the upper end of the movable block 322.

[0048] In this embodiment, the guide block 321 is used to limit the movable block 322, so that the movable block 322 will not fall off from the set track when moving.

[0049] The docking cylinder 31 is communicated with the connecting pipe 272, and fixing components such as a clamp are arranged on the outer surface of the docking cylinder 31, so that the whole is kept stable when the docking cylinder 31 is communicated with the connecting pipe 272.

[0050] Multiple groups of holes are arranged at the end of the bottom plate 32, and the two ends of the bottom plate 32 are communicated through the holes.

[0051] Further, an adjusting rod 331 is rotatably installed on the inner wall of the limiting block 33. At the same time, a limiting rod 34 is rotatably installed at the lower end of the inner wall of the limiting block 33, and the upper end of the limiting rod 34 is rotatably connected to the end of the adjusting rod 331.

[0052] Specifically, the adjusting rod 331 is a device with a telescopic function such as a screw rod. By adjusting the position of the adjusting rod 331, the limiting rod 34 arranged at its end is synchronously driven to rotate until the limiting rod 34 stops at a suitable position.

[0053] Further, a rotating block 341 is rotatably installed at the lower end of the limiting rod 34, and the cross section of the rotating block 341 is arc-shaped. A sphere 35 is arranged in the inner cavity of the docking cylinder 31. An arc-shaped groove 351 corresponding to the rotating block 341 is formed on the outer surface of the sphere 35, and the inner wall of the arc-shaped groove 351 is slidably connected to the outer surface of the rotating block 341.

[0054] Specifically, when the rotating block 341 moves, the sphere 35 is synchronously driven to move. The outer surface of the rotating block 341 is slidably connected to the inner wall of the arc-shaped groove 351, and at the same time, the rotating block 341 is clamped on the inner wall of the arc-shaped groove 351. Thus, the sphere 35 moves synchronously with the rotating block 341. A sealing component such as rubber is arranged on the outer surface of the sphere 35. The inner wall of the connecting pipe 272 is sealed by the sphere 35, so that the distance between the sphere 35 and the connecting pipe 272 is controlled, and further the pressure flow rate is controlled.

[0055] Further, a turntable 36 is rotatably installed at the upper end of the bottom plate 32. Multiple groups of driving grooves 361 are formed at the end of the turntable 36, and the multiple groups of driving grooves 361 are uniformly distributed on the turntable 36. A fixing plate 37 is rotatably installed at the upper end of the turntable 36, and the outer surface of the fixing plate 37 is connected to the bottom plate 32.

[0056] Specifically, a device with power output such as a motor is arranged at the end of the bottom plate 32 and is connected to an external control device. When the motor is started, the turntable 36 arranged at its output end is synchronously driven to rotate. At the same time, when the turntable 36 rotates, the driving grooves 361 are driven to rotate, so that the driving blocks 362 arranged on the inner walls of the driving grooves 361 move.

[0057] Furthermore, an adjustment groove 371 corresponding to the driving groove 361 is formed at the end of the fixing plate 37. A sliding rod 372 is slidably mounted on the inner wall of the adjustment groove 371. At the same time, the end of the sliding rod 372 is connected to the outer surface of the movable block 322. A driving block 362 is slidably mounted on the inner wall of the driving groove 361, and the end of the driving block 362 is connected to the outer surface of the sliding rod 372.

[0058] Specifically, since the end of the driving block 362 is connected to the outer surface of the sliding rod 372, and the outer surface of the sliding rod 372 is slidably connected to the inner wall of the adjustment groove 371, when the driving block 362 moves, it synchronously drives the sliding rod 372 to move on the inner wall of the adjustment groove 371, so that the sliding rod 372 expands outward or contracts toward the middle until it stops after reaching the specified position.

[0059] The control device can select a single-chip microcomputer as the control terminal. In this embodiment, the single-chip microcomputer is a typical embedded microcontroller (Micro controller Unit), which is composed of an arithmetic unit, a controller, a memory, input and output devices, etc., and is equivalent to a miniature computer. Compared with the general-purpose microprocessor used in personal computers, it emphasizes more on self-supply (without external hardware) and cost savings. Its greatest advantage is its small size, which can be placed inside the instrument, but its storage capacity is small, the input and output interfaces are simple, and the function consumption is low.

[0060] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the claims of the present invention.

Claims

1. A pressure relief oil wellhead, characterized in that: It comprises a main body (1), wherein the inner cavity of the main body (1) is provided with a discharge component (2), and the pressure in the oil well is discharged through the discharge component (2); A regulating component (3) is assembled at the lower end of the discharge component (2), and the regulating component (3) is connected to a pipeline at the oil wellhead, and the rate of pressure discharge in the oil well is controlled by the regulating component (3); The discharge assembly (2) comprises a driving member (21) connected to the inner wall of the main body (1), and the output end of the driving member (21) is provided with two push rods (22) through the rotation of the crankshaft, and the two push rods (22) are adjacently arranged on the outer surface of the crankshaft; A fixing block (23) is provided on the inner wall of the main body (1) and located on one side of the driving member (21); a guide groove (231) is symmetrically provided on the upper end of the fixing block (23); a sliding block (24) is slidably mounted on the inner wall of the guiding groove (231); one end of the sliding block (24) is connected to the end of the push rod (22); A protective rod (241) is provided at one opposite end of the two sliders (24), and a driving rod (242) is provided at one end of the slider (24) away from the push rod (22), a connecting block (25) is provided at the end of the driving rod (242), and one side of the connecting block (25) is connected to the end of the protective rod (241); A positioning block (27) is provided on the inner wall of the main body (1) and located on one side of the connecting block (25); a through hole (271) is symmetrically provided on the inner wall of the positioning block (27); a sealing block (28) is slidably mounted on the inner wall of the through hole (271); a movable rod (26) is provided at the end of the sealing block (28); an end of the movable rod (26) away from the sealing block (28) is connected to the end of the connecting block (25); and a connecting pipe (272) is provided at the lower end of the positioning block (27); the connecting pipe (272) is communicated with the through hole (271); The protection rod (241) is a component of the telescopic rod having a telescopic function. The protection rod (241) realizes the movement of the connection block (25) through its telescopic function, and the slider (24) realizes the continuous discharge of the two sealing blocks (28) by alternating movement. The two sealing blocks (28) are in a central position to close the connecting pipe (272) and discharge the pressure in the through hole (271) when moving.

2. A pressure relief oil wellhead according to claim 1, characterized in that: The adjustment assembly (3) comprises a docking sleeve (31) connected to the connecting pipe (272), the inner wall of the docking sleeve (31) being provided with a bottom plate (32), the end of the bottom plate (32) being provided with a plurality of groups of guide blocks (321), and the plurality of groups of guide blocks (321) being evenly distributed on the bottom plate (32).

3. A pressure relief oil wellhead according to claim 2, characterized in that: A movable block (322) is slidably mounted on the upper end of the guide block (321), and a limiting block (33) is provided on the upper end of the movable block (322).

4. A pressure relief oil wellhead according to claim 3, characterized in that: An adjusting rod (331) is rotatably mounted on the inner wall of the limiting block (33), and a limiting rod (34) is rotatably mounted on the lower end of the inner wall of the limiting block (33), and the upper end of the limiting rod (34) is rotatably connected to the end of the adjusting rod (331).

5. A pressure relief oil wellhead according to claim 4, characterized in that: A rotating block (341) is rotatably mounted on the lower end of the limiting rod (34), and the cross section of the rotating block (341) is arc-shaped.

6. A pressure relief oil wellhead according to claim 5, characterized in that: The inner cavity of the docking tube (31) is provided with a spherical body (35), the outer surface of the spherical body (35) is provided with an arc-shaped groove (351) corresponding to the rotating block (341), and the inner wall of the arc-shaped groove (351) is slidably connected to the outer surface of the rotating block (341).

7. A pressure relief oil wellhead according to claim 6, characterized in that: A turntable (36) is rotatably mounted on the upper end of the bottom plate (32), and a plurality of groups of driving grooves (361) are provided at the end of the turntable (36), and the plurality of groups of driving grooves (361) are evenly distributed on the turntable (36).

8. A pressure relief oil wellhead according to claim 7, characterized in that: A fixing plate (37) is rotatably mounted on the upper end of the rotating disk (36), and the outer surface of the fixing plate (37) is connected to the bottom plate (32).

9. A pressure relief oil wellhead according to claim 8, characterized in that: An adjustment groove (371) corresponding to the driving groove (361) is formed at the end of the fixing plate (37), a sliding rod (372) is slidably mounted on the inner wall of the adjustment groove (371), and an end of the sliding rod (372) is connected to the outer surface of the movable block (322).

10. A pressure relief oil wellhead according to claim 9, characterized in that: A driving block (362) is slidably mounted on the inner wall of the driving groove (361), and an end of the driving block (362) is connected to the outer surface of the sliding rod (372).

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