Pressure relief type petroleum wellhead

Abstract

The invention discloses a pressure relief type petroleum wellhead, which relates to the technical field of petroleum wells, and comprises a main body, a discharge assembly is arranged in an inner cavity of the main body, and pressure in the petroleum well is discharged through the discharge assembly; according to the pressure relief type petroleum wellhead, when the connecting block moves, the movable rod arranged at the end of the connecting block is synchronously driven to move, meanwhile, the sealing block arranged on the movable rod is matched to move, and therefore pressure in the through hole is discharged. The pressure in the petroleum well is conducted to the inner wall of the through hole through the connecting pipe, the pressure in the through hole is discharged through the sealing blocks moving in a reciprocating mode, the pressure in the petroleum well is detected again after a part of the pressure is discharged every time, and if the detected pressure is consistent, the two sealing blocks are located in the middle position, and then the connecting pipe is closed; and if the detected pressure is not consistent, the pressure is continuously discharged through the two sealing blocks until the qualified standard is reached.

Description

Technical Field

[0001] The invention relates to oil well technology, in particular to a pressure relief oil wellhead. Background Art

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

[0003] A Chinese invention patent with publication number CN115637947B discloses a pressure relief oil wellhead. The pressure relief oil wellhead of the present invention can insert two sealing plugs into two exhaust pipes respectively to seal the exhaust pipes when the pressure relief oil well does not need to release pressure, thereby achieving the purpose of sealing the pressure relief oil well. When the pressure relief oil well releases pressure, the gas discharged from the pressure relief oil well is filtered to prevent the gas from being mixed with petroleum impurities and entering the surrounding environment, thereby improving the environmental protection of the pressure relief oil wellhead. When the pressure in the pressure relief oil well cannot be more effectively released through the two exhaust pipes, the oil and pressure in the pressure relief oil well can be quickly transported to the pressure relief storage tank by opening the pressure relief oil pipe, thereby better controlling the pressure in the pressure relief oil well and improving the practicality and environmental protection of the pressure relief oil well.

[0004] When existing equipment is in use, if the pressure relief valve is opened excessively, the wellhead pressure may drop too low, thereby affecting the oil and gas production efficiency or causing wellhead control instability. If the pressure relief is incomplete, the wellhead pressure may still be too high, posing a risk of blowout. Therefore, a pressure relief oil wellhead has been developed. Summary of the invention

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

[0006] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: a pressure relief oil wellhead, comprising a main body, the inner cavity of the main body is provided with a discharge assembly, and the pressure in the oil well is discharged through the discharge assembly;

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

[0008] Wherein, 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 provided with two push rods through the rotation of the crankshaft, and the two push rods are adjacently arranged on the outer surface of the crankshaft;

[0009] A fixing block is arranged on the inner wall of the main body and on one side of the driving member, a guide groove is symmetrically provided on the upper end of the fixing block, a slider is slidably installed on the inner wall of the guide groove, and one end of the slider is connected to the end of the push rod;

[0010] A protective rod is disposed at one end opposite to the two sliders, and a driving rod is disposed at one end of the slider away from the push rod, and a connecting block is disposed 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 provided on the inner wall of the main body and on one side of the connecting block. Through holes are symmetrically provided on the inner wall of the positioning block. A sealing block is slidably installed on the inner wall of the through hole. A movable rod is provided at the end of the sealing block. One end of the movable rod away from the sealing block is connected to the end of the connecting block. At the same time, a connecting pipe is provided at the lower end of the positioning block, and the connecting pipe is connected to the through hole.

[0012] As a further optimization scheme of the present invention, the adjustment assembly includes a docking sleeve connected to the connecting pipe, the inner wall of the docking sleeve is provided with a base plate, the end of the base plate is provided with multiple groups of guide blocks, and the multiple groups of guide blocks are evenly distributed on the base plate.

[0013] As a further optimization solution of the present invention, a movable block is slidably mounted on the upper end of the guide block, and a limiting block is arranged on the upper end of the movable block.

[0014] As a further optimization scheme of the present invention, an adjusting rod is rotatably installed on the inner wall of the limiting block, and a limiting rod is rotatably installed on 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 optimization solution of the present invention, a rotating block is rotatably mounted on the lower end of the limiting rod, and the cross section of the rotating block is arc-shaped.

[0016] As a further optimization scheme of the present invention, the inner cavity of the docking tube is provided with a sphere, the outer surface of the sphere is provided with an arc groove corresponding to the rotating block, and the inner wall of the arc groove is slidably connected to the outer surface of the rotating block.

[0017] As a further optimization solution of the present invention, a turntable is rotatably mounted on the upper end of the base plate, and a plurality of drive slots are provided at the end of the turntable, and the plurality of drive slots are evenly distributed on the turntable.

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

[0019] As a further optimization scheme of the present invention, an adjustment groove corresponding to the driving groove is opened at the end of the fixed plate, a sliding rod is slidably installed on the inner wall of the adjustment groove, and the end of the sliding rod is connected to the outer surface of the movable block.

[0020] As a further optimization solution of the present invention, a driving block is slidably mounted 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, the pressure relief oil wellhead provided by the present invention has the following beneficial effects: when the connecting block moves, it synchronously drives the movable rod arranged at its end to move, and cooperates with the sealing block arranged on the movable rod to move, so as to discharge the pressure inside the through hole. 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 through the reciprocating sealing block, and after each discharge of a part, the pressure in the oil well is re-tested. If the detected pressure meets the requirements, the two sealing blocks are in the middle position, and then the connecting pipe is closed. If the detected pressure does not meet the requirements, the pressure is continuously discharged through the two sealing blocks until it reaches the qualified standard and stops.

[0022] When the rotating block moves, the sphere is driven to move synchronously, wherein the outer surface of the rotating block is slidably connected to the inner wall of the arc groove, and the rotating block is clamped on the inner wall of the arc groove, so that the sphere moves synchronously with the rotating block, and the outer surface of the sphere is provided with rubber and other sealing components, and the inner wall of the connecting pipe is sealed by the sphere, so that the distance between the sphere and the connecting pipe is controlled, thereby controlling the pressure flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0024] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0025] Figure 2 A cross-sectional view of the overall internal structure provided by an embodiment of the present invention;

[0026] Figure 3 A first cross-sectional view of the internal structure of a discharge assembly provided by an embodiment of the present invention;

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

[0028] Figure 5 A schematic diagram of the structure of an adjustment component provided in an embodiment of the present invention;

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

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

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

[0032] Description of reference numerals:

[0033] 1. Main body; 2. Discharge assembly; 3. Adjustment assembly; 21. Driving member; 22. Push rod; 23. Fixed block; 231. Guide groove; 24. Sliding block; 241. Protective rod; 242. Driving rod; 25. Connecting block; 26. Movable rod; 27. Positioning block; 271. Through hole; 272. Connecting pipe; 28. Sealing block; 31. Docking tube; 32. Bottom plate; 321. Guide block; 322. Movable block; 33. Limiting block; 331. Adjustment rod; 34. Limiting rod; 341. Rotating block; 35. Ball; 351. Arc groove; 36. Turntable; 361. Driving groove; 362. Driving block; 37. Fixed plate; 371. Adjustment groove; 372. Sliding rod. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection 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", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and 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 cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "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, or it can be the internal communication of 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] Example: See Figure 1-Figure 8 A pressure relief oil wellhead comprises a main body 1, an 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.

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

[0038] Furthermore, 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 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.

[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 back and forth.

[0040] Furthermore, a fixing block 23 is provided on the inner wall of the main body 1 and 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 slider 24 is slidably installed on the inner wall of the guide groove 231 , and one end of the slider 24 is connected to the end of the push rod 22 .

[0041] Specifically, when the push rod 22 moves, the slider 24 disposed at the end thereof is synchronously driven to move, and the slider 24 is limited by the guide groove 231, thereby ensuring that the slider 24 does not fall off when moving.

[0042] Furthermore, a protective rod 241 is provided at the opposite end of the two sliders 24, and a driving rod 242 is provided at the 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.

[0043] Specifically, the protection rod 241 is a component with a telescopic function such as a telescopic rod, so as to ensure the stability of the connection block 25 when the two sliders 24 move alternately, and cooperate with the driving rod 242 to drive the connection block 25 to move when the slider 24 moves.

[0044] Furthermore, 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, and a through hole 271 is 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 connecting 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 connected to the through hole 271.

[0045] Specifically, when the connecting block 25 moves, the movable rod 26 disposed at its end is synchronously driven to move, and the sealing block 28 disposed on the movable rod 26 is coordinated 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, and the pressure in the through hole 271 is discharged through the reciprocating sealing block 28. After each part of the pressure is discharged, the pressure in the oil well is re-tested. If the detected pressure meets the requirements, the two sealing blocks 28 are in the center position, and the connecting pipe 272 is closed. If the detected pressure does not meet the requirements, the pressure is continuously discharged through the two sealing blocks 28 until it reaches the qualified standard and stops.

[0047] Further, the regulating assembly 3 is assembled at the lower end of the discharge assembly 2, and the regulating assembly 3 is connected to the pipeline of the oil wellhead, and the rate of pressure discharge in the oil well is controlled by the regulating assembly 3; the regulating assembly 3 includes a docking tube 31 connected to the connecting pipe 272, and the inner wall of the docking tube 31 is provided with a bottom plate 32, and the end of the bottom plate 32 is provided with multiple groups of guide blocks 321, and the multiple groups of guide blocks 321 are evenly distributed on the bottom plate 32. The upper end of the guide block 321 is slidably mounted with a movable block 322, and the upper end of the movable block 322 is provided with a limiting block 33.

[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 the set track when moving.

[0049] The docking sleeve 31 is connected to the connecting pipe 272 , and a fixing component such as a clamp is provided on the outer surface of the docking sleeve 31 , so that when the docking sleeve 31 is connected to the connecting pipe 272 , the whole remains stable.

[0050] A plurality of groups of holes are disposed at the end of the bottom plate 32 , and the two ends of the bottom plate 32 are connected through the holes.

[0051] Furthermore, 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 .

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

[0053] Furthermore, a rotating block 341 is rotatably mounted 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 disposed in the inner cavity of the docking tube 31, and an arc 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 groove 351 is slidably connected to the outer surface of the rotating block 341.

[0054] Specifically, when the rotating block 341 moves, the ball 35 is synchronously driven to move, wherein the outer surface of the rotating block 341 is slidingly connected to the inner wall of the arc groove 351, and the rotating block 341 is clamped on the inner wall of the arc groove 351, so that the ball 35 moves synchronously with the rotating block 341, and the outer surface of the ball 35 is provided with rubber or other sealing components, and the inner wall of the connecting tube 272 is sealed by the ball 35, so that the distance between the ball 35 and the connecting tube 272 is controlled, thereby controlling the pressure flow rate.

[0055] Furthermore, a turntable 36 is rotatably mounted on the upper end of the bottom plate 32, and a plurality of drive slots 361 are formed at the end of the turntable 36, and the plurality of drive slots 361 are evenly distributed on the turntable 36. A fixing plate 37 is rotatably mounted on 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 provided at the end of the base plate 32 and is connected to an external control device. When the motor is started, the turntable 36 provided at its output end is synchronously driven to rotate. At the same time, when the turntable 36 rotates, the driving slot 361 is driven to rotate, so that the driving block 362 provided on the inner wall of the driving slot 361 moves.

[0057] Furthermore, an adjustment slot 371 corresponding to the driving slot 361 is formed at the end of the fixing plate 37, a slide bar 372 is slidably mounted on the inner wall of the adjustment slot 371, and the end of the slide bar 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 slot 361, and the end of the driving block 362 is connected to the outer surface of the slide bar 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 adjusting groove 371, when the driving block 362 moves, it simultaneously drives the sliding rod 372 to move on the inner wall of the adjusting groove 371, thereby causing the sliding rod 372 to expand outward or contract toward the middle until it reaches the specified position and stops.

[0059] The control device can select a single-chip microcomputer as the control end. 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, an input and output device, etc., which is equivalent to a microcomputer. Compared with the general-purpose microprocessor used in personal computers, it emphasizes self-supply (no external hardware) and cost saving. Its biggest advantage is that it is small in size and can be placed inside the instrument, but it has a small storage capacity, a simple input and output interface, and low functional consumption.

[0060] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A pressure relief oil wellhead, characterized in that: It comprises a main body (1), 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 assembly (3) is mounted on the lower end of the discharge assembly (2), and the regulating assembly (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 assembly (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) which are rotatably mounted on a 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), and 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); and a movable rod (26) is provided at the end of the sealing block (28); one 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); and the connecting pipe (272) is communicated with the through hole (271).

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) is provided with a bottom plate (32); the end of the bottom plate (32) is provided with a plurality of guide blocks (321), and the plurality of guide blocks (321) are 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 arranged 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 sphere (35), the outer surface of the sphere (35) is provided with an arc groove (351) corresponding to the rotating block (341), and the inner wall of the arc 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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