Oil well casing deflation valve

Abstract

The utility model discloses an oil well casing pipe deflation valve which comprises a protection box, a deflation unit is arranged on the inner side of the protection box, a PLC is fixedly connected to the front side of the protection box, an alarm is fixedly connected to the upper side of the protection box, the deflation unit comprises a first fixing cylinder, the first fixing cylinder is fixedly connected to the inner side of the protection box, and a second fixing cylinder is fixedly connected to the inner side of the protection box. The outer side of the first fixing cylinder is fixedly connected with a fixing pipe, the right end of the fixing pipe is fixedly connected with a control box, the lower side of the control box is fixedly connected with a connecting pipe, the lower end of the connecting pipe is fixedly connected with a second fixing cylinder, and the lower side of the first fixing cylinder is fixedly connected with an insertion pipe. By arranging the first fixing cylinder, the second fixing cylinder, the first spring, the second spring, the first valve ball, the second valve ball, the first deflation pipe, the second deflation pipe and the control box, the second valve ball in the second fixing cylinder can be conveniently switched to be used after the springs of the deflation valve are fatigued for a long time, the deflation valve can be normally used, and pressure unbalance in an oil well is avoided.

Description

Technical Field

[0001] This utility model relates to the field of venting valve technology, and in particular to an oil well casing venting valve. Background Technology

[0002] An oil well is a drilling project used to extract underground oil and natural gas, and it is one of the core facilities of the petroleum industry. The construction and operation of oil wells involve multiple stages, including geological exploration, drilling, well completion, oil production, and maintenance.

[0003] A search revealed Chinese patent application number "CN202322871228.5", which specifically describes a gas venting valve for oil well casing. In use, it connects to the wellhead device via the external connection of the connecting seat. Adjusting the adjusting nut and the spring seat adjusts the spring compression, applying force to the valve ball. When the pressure inside the oil well exceeds the spring force, the spring is compressed by the gas pressure, which pushes the valve ball away from the connecting seat. Gas with a certain pressure enters the valve body and is released through the vent pipe.

[0004] In existing technologies, when a venting valve is used, a spring and a valve ball work together to compress the spring when the pressure inside the oil well is high, allowing gas to be released and maintaining the pressure inside the oil well at a qualified value. However, when the pressure inside the oil well is unstable, the spring is in a state of repeated stretching. After prolonged use, the spring is prone to fatigue, causing the venting valve to be in a continuous venting state, which can easily lead to pressure imbalance inside the oil well and is not conducive to oil well exploitation. Utility Model Content

[0005] The purpose of this utility model is to provide an oil well casing venting valve, which solves the problem that the spring inside the venting valve is easily damaged after a period of use, causing pressure imbalance in the oil well.

[0006] To achieve the above objectives, an oil well casing venting valve is provided, comprising a protective box, an venting unit being provided inside the protective box, a PLC controller being fixedly connected to the front of the protective box, and an alarm being fixedly connected to the upper side of the protective box.

[0007] The venting unit includes a first fixed cylinder, which is fixedly connected to the inside of the protective box. A fixed pipe is fixedly connected to the outside of the first fixed cylinder. A control box is fixedly connected to the right end of the fixed pipe. A connecting pipe is fixedly connected to the lower side of the control box. A second fixed cylinder is fixedly connected to the lower end of the connecting pipe. An insertion pipe is fixedly connected to the lower side of the first fixed cylinder. A second venting pipe is fixedly connected to the outside of the second fixed cylinder. A first venting pipe is fixedly connected to the right side of the control box. A first spring is fixedly connected to the inside of the first fixed cylinder. A first valve ball is fixedly connected to the lower side of the first spring. A second spring is fixedly connected to the inside of the second fixed cylinder. A second valve ball is fixedly connected to the lower side of the second spring.

[0008] According to the aforementioned oil well casing venting valve, a cover plate one is provided at the bottom of the inner side of the control box, a fixing rod is fixedly connected to the upper side of the cover plate one, a cover plate two is fixedly connected to the upper end of the fixing rod, an L-shaped block is fixedly connected to the right side of the cover plate one, a rotating rod is rotatably connected to the inner side of the control box, the rotating rod is fixedly connected to the L-shaped block, the front end of the rotating rod passes through the front side of the control box and is fixedly connected to a turntable, a rotating plate is fixedly connected to the outer side of the turntable, an electric push rod is rotatably connected to the front side of the rotating plate, and the electric push rod is rotatably connected to the control box.

[0009] According to the aforementioned oil well casing venting valve, the electric push rod is configured with an inclined structure.

[0010] According to the aforementioned oil well casing venting valve, a pressure sensor is installed on the inner side of the venting pipe.

[0011] According to the aforementioned oil well casing venting valve, a one-way valve is provided on the outer side of the venting pipe two.

[0012] According to the aforementioned oil well casing venting valve, the right ends of both venting pipe one and venting pipe two pass through the right side of the protective box.

[0013] According to the aforementioned oil well casing venting valve, the lower side of the insertion pipe passes through the lower side of the protective box.

[0014] According to the aforementioned oil well casing venting valve, valve ball one is slidably connected to fixed cylinder one, and valve ball two is slidably connected to fixed cylinder two.

[0015] The above-mentioned solution has the following beneficial effects:

[0016] By incorporating a fixed cylinder 1, a fixed cylinder 2, a spring 1, a spring 2, a valve ball 1, a valve ball 2, a vent pipe 1, a vent pipe 2, and a control box, it is convenient to switch to valve ball 2 in fixed cylinder 2 after the vent valve has been fatigued for a long time, so that the vent valve can be used normally and pressure imbalance in the oil well can be avoided.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0019] Figure 1 This is a three-dimensional structural diagram of an oil well casing venting valve according to the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of the internal structure of an oil well casing venting valve according to the present invention;

[0021] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a three-dimensional cross-sectional view of an oil well casing venting valve according to the present invention.

[0023] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0024] Legend:

[0025] 1. Protective box; 2. PLC controller; 3. Alarm; 4. Venting unit; 401. Fixed cylinder one; 402. Insert tube; 403. Fixed tube; 404. Control box; 405. Venting pipe one; 406. Pressure sensor; 407. Fixed cylinder two; 408. Venting pipe two; 409. One-way valve; 410. Rotating rod; 411. Turntable; 412. Rotating plate; 413. Electric push rod; 414. Connecting pipe; 415. Spring one; 416. Valve ball one; 417. Spring two; 418. Valve ball two; 419. Cover plate one; 420. Fixed rod; 421. Cover plate two; 422. L-shaped block. Detailed Implementation

[0026] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0027] Reference Figure 1 - Figure 5 This utility model provides an oil well casing venting valve, including a protective box 1. A venting unit 4 is provided inside the protective box 1. A PLC controller 2 is fixedly connected to the front of the protective box 1, and an alarm 3 is fixedly connected to the upper side of the protective box 1. The alarm 3, the air pressure sensor 406, and the electric push rod 413 are controlled by the PLC controller 2. When the air pressure sensor 406 detects an abnormal air pressure, the alarm 3 is activated, and the electric push rod 413 is controlled to facilitate normal venting. The air pressure sensor 406 is a BMP280.

[0028] The venting unit 4 includes a first fixed cylinder 401, which is fixedly connected to the inside of the protective box 1. A fixed pipe 403 is fixedly connected to the outside of the first fixed cylinder 401. A control box 404 is fixedly connected to the right end of the fixed pipe 403. A connecting pipe 414 is fixedly connected to the lower side of the control box 404. A second fixed cylinder 407 is fixedly connected to the lower end of the connecting pipe 414. An insertion pipe 402 is fixedly connected to the lower side of the first fixed cylinder 401. The outside of the second fixed cylinder 407 is fixedly connected to... A second vent pipe 408 is connected to the control box 404. A first vent pipe 405 is fixedly connected to the right side of the control box 404. A first spring 415 is fixedly connected to the inside of the first fixed cylinder 401. A first valve ball 416 is fixedly connected to the lower side of the first spring 415. A second spring 417 is fixedly connected to the inside of the second fixed cylinder 407. A second valve ball 418 is fixedly connected to the lower side of the second spring 417. The first valve ball 416 is slidably connected to the first fixed cylinder 401, and the second valve ball 418 is slidably connected to the second fixed cylinder 407.

[0029] A cover plate 419 is provided at the bottom of the inner side of the control box 404. A fixing rod 420 is fixedly connected to the upper side of the cover plate 419. A cover plate 421 is fixedly connected to the upper end of the fixing rod 420. An L-shaped block 422 is fixedly connected to the right side of the cover plate 419. A rotating rod 410 is rotatably connected to the inner side of the control box 404. The rotating rod 410 is fixedly connected to the L-shaped block 422. The front end of the rotating rod 410 passes through the front side of the control box 404 and is fixedly connected to a turntable 411. A rotating plate 412 is fixedly connected to the outer side of the turntable 411. An electric push rod 413 is rotatably connected to the front side of plate 412. The electric push rod 413 is rotatably connected to control box 404. The electric push rod 413 is set with an inclined structure. A pressure sensor 406 is set inside the first vent pipe 405. A one-way valve 409 is set outside the second vent pipe 408. The right ends of the first vent pipe 405 and the second vent pipe 408 both pass through the right side of the protective box 1. The lower side of the insertion pipe 402 passes through the lower side of the protective box 1. The insertion pipe 402 is connected to the wellhead. During normal venting, the wellhead discharges gas into the fixed... In cylinder 401, gas pushes valve ball 416 to move. When valve ball 416 moves to the fixed pipe 403, gas enters control box 404 and is discharged through vent pipe 405. After prolonged use, spring 415 is damaged, and gas continues to be discharged. Pressure sensor 406 detects stable pressure and controls electric push rod 413 to extend and retract via PLC controller 2. Electric push rod 413 drives rotating plate 412 to rotate, rotating plate 412 drives rotating disk 411 to rotate, and rotating disk 411 drives rotating rod. Rotating rod 410 drives L-shaped block 422 to rotate, L-shaped block 422 drives cover plate 419 to rotate, and cover plate 419 drives cover plate 421 on fixed rod 420 to rotate, so that cover plate 421 blocks vent pipe 405. At this time, gas enters fixed cylinder 407, and under the action of spring 417, valve ball 418 can easily maintain the gas pressure balance in the well. When the gas pressure increases, it pushes valve ball 418 to move, so that vent pipe 408 can discharge gas, and the vent valve can be used normally.

[0030] Working principle: During use, the insertion tube 402 is inserted into the wellhead, and the gas from the wellhead is introduced into the fixed cylinder 401. Through the spring 415 and the valve ball 416, the gas is easily discharged through the vent pipe 405. After a period of use, the spring 415 is damaged, and the electric push rod 413 drives the turntable 411 to rotate, so that the cover plate 421 blocks the vent pipe 405. The gas is introduced into the fixed cylinder 407, and through the spring 417 and the valve ball 418, the gas is easily discharged through the vent pipe 408, avoiding pressure imbalance.

[0031] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A gas venting valve for oil well casing, comprising a protective housing (1), characterized in that, The protective box (1) is provided with an air release unit (4) on the inside, a PLC controller (2) is fixedly connected to the front of the protective box (1), and an alarm (3) is fixedly connected to the top of the protective box (1). The venting unit (4) includes a fixed cylinder one (401), which is fixedly connected to the inner side of the protective box (1). A fixed pipe (403) is fixedly connected to the outer side of the fixed cylinder one (401). A control box (404) is fixedly connected to the right end of the fixed pipe (403). A connecting pipe (414) is fixedly connected to the lower side of the control box (404). A fixed cylinder two (407) is fixedly connected to the lower end of the connecting pipe (414). The lower side of the fixed cylinder one (401) is fixedly connected to... There is an insertion tube (402), and an air release pipe (408) is fixedly connected to the outer side of the second fixed cylinder (407). An air release pipe (405) is fixedly connected to the right side of the control box (404). A spring (415) is fixedly connected to the inner side of the first fixed cylinder (401). A valve ball (416) is fixedly connected to the lower side of the first spring (415). A spring (417) is fixedly connected to the inner side of the second fixed cylinder (407). A valve ball (418) is fixedly connected to the lower side of the second spring (417).

2. The oil well casing venting valve according to claim 1, characterized in that, The bottom of the inner side of the control box (404) is provided with a cover plate 1 (419). A fixing rod (420) is fixedly connected to the upper side of the cover plate 1 (419). A cover plate 2 (421) is fixedly connected to the upper end of the fixing rod (420). An L-shaped block (422) is fixedly connected to the right side of the cover plate 1 (419). A rotating rod (410) is rotatably connected to the inner side of the control box (404). The rotating rod (410) is fixedly connected to the L-shaped block (422). The front end of the rotating rod (410) passes through the front side of the control box (404) and is fixedly connected to a turntable (411). A rotating plate (412) is fixedly connected to the outer side of the turntable (411). An electric push rod (413) is rotatably connected to the front side of the rotating plate (412). The electric push rod (413) is rotatably connected to the control box (404).

3. The oil well casing venting valve according to claim 2, characterized in that, The electric push rod (413) is designed with an inclined structure.

4. The oil well casing venting valve according to claim 1, characterized in that, A pressure sensor (406) is provided on the inner side of the vent pipe (405).

5. The oil well casing venting valve according to claim 1, characterized in that, A one-way valve (409) is provided on the outside of the second vent pipe (408).

6. The oil well casing venting valve according to claim 1, characterized in that, The right ends of the first vent pipe (405) and the second vent pipe (408) both pass through the right side of the protective box (1).

7. The oil well casing venting valve according to claim 1, characterized in that, The lower side of the cannula (402) passes through the lower side of the protective box (1).

8. The oil well casing venting valve according to claim 1, characterized in that, The first valve ball (416) is slidably connected to the first fixed cylinder (401), and the second valve ball (418) is slidably connected to the second fixed cylinder (407).

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