Pressure relief device for producing well

Abstract

The utility model relates to the technical field of oil well pressure relief devices, and discloses an oil production well pressure relief device which comprises an oil production well pipe, a well pipe closing cover is arranged at the top end of the oil production well pipe, one side of the well pipe closing cover is communicated with an oil production pipe, and a first valve is arranged on the oil production pipe. The oil well safety pressure relief assembly is arranged on the side edge of the oil production well pipe, the oil production pipe is used for being normally connected with the oil production pipe after pressure relief, and then gas is exhausted through the pressure relief exhaust holes evenly formed in the bottom side of the pressure relief exhaust pipe. A proper amount of sodium hydroxide solution can be injected into the pressure relief purification box in advance, so that hydrogen sulfide exhausted into the solution through the pressure relief exhaust hole is effectively absorbed, hydrogen sulfide gas contained in pressure relief gas can be absorbed while pressure relief of the oil well is carried out, and the situation that the hydrogen sulfide gas is exhausted into air to pollute the environment is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of oil well pressure relief devices, specifically an oil well pressure relief device. Background Technology

[0002] An oil well is a hole drilled using drilling methods. Generally, after drilling to the oil layer, an oil layer casing is run in, and oil well cement is injected into the annular space between the casing and the well wall to maintain the well wall and seal the oil, gas, and water layers. Then, according to the requirements of oilfield development, the oil layer is perforated with a perforating gun.

[0003] A search revealed that this utility model, authorized by Chinese Patent Publication No. CN 221503256 U, belongs to the technical field of oil well drilling, specifically relating to an oil well pressure relief device. It is installed at the wellhead of an oil well, which contains an oil production pipe and an oil outlet pipe. The device includes: a blowout prevention pipe, a drain pipe, a mounting shell, a control plug, an annular seat, and a venting assembly. The inlet of the blowout prevention pipe is connected to the outlet of the oil production pipe; the drain pipe is located on the blowout prevention pipe; the mounting shell is symmetrically arranged on the outside of the blowout prevention pipe, and a telescopic rod is installed inside the mounting shell, with a buffer spring sleeved on the outer wall of the telescopic rod; the control plug is located at the extended end of the telescopic rod; the annular seat is located on the inner wall of the blowout prevention pipe, and the inner wall of the annular seat is slidably connected to the control plug; the venting assembly is located inside the blowout prevention pipe and above the control plug. This device solves the problem of high internal pressure in oil wells, which may lead to blowouts or oil outlet pipe rupture.

[0004] The pressure relief device in the aforementioned patent still has certain shortcomings. In actual use, existing oil well pressure relief devices not only accumulate a large amount of pressure in oil wells that have been shut down for a long time, but also produce hydrogen sulfide gas. However, traditional pressure relief methods are difficult to deal with hydrogen sulfide gas, and rashly releasing it will cause environmental pollution. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an oil well pressure relief device. This device solves the problem that existing oil well pressure relief devices, when used in actual applications, not only accumulate significant pressure in oil wells that have been shut down for a long time, but also generate hydrogen sulfide gas. However, traditional pressure relief methods are inadequate for treating hydrogen sulfide gas, and its unauthorized release would cause environmental pollution.

[0006] This utility model provides the following technical solution: an oil well pressure relief device, including an oil well pipe, a well pipe closing cover is provided at the top of the oil well pipe, an oil well pipe is connected to one side of the well pipe closing cover, a first valve is provided on the oil well pipe, and an oil well safety pressure relief component is provided on the other side of the well pipe closing cover.

[0007] The oil well safety pressure relief assembly includes a pressure relief pipe connected to the well casing closure cover, a second valve installed on the pressure relief pipe, a pressure relief purification box installed on the side of the oil well casing, casters evenly distributed around the bottom of the pressure relief purification box, a top closure cover rotatably installed on the top of the pressure relief purification box, an installation port opened in the middle of the side of the top closure cover, an output hose connected to the end of the pressure relief pipe, a box wall connecting frame installed inside the pressure relief purification box, an air inlet buffer pipe installed at the top of the box wall connecting frame, several pressure relief and exhaust pipes evenly connected to the bottom of the air inlet buffer pipe, several pressure relief and exhaust holes evenly distributed on both sides of the bottom of the pressure relief and exhaust pipe, a conveying connecting pipe connected to the top of the middle of the air inlet buffer pipe, and the top of the conveying connecting pipe penetrating the middle of the box wall connecting frame.

[0008] Preferred technical solution 1: A hydrogen sulfide detector is provided at the top of the conveying connection pipe, and the end of the output hose is connected to the hydrogen sulfide detector.

[0009] Preferred technical solution 2: The bottom end of the side of the pressure relief purification box is connected to a drain pipe, and a closing valve is installed on the drain pipe.

[0010] Preferred technical solution three: The pressure relief purification box is a rectangular cylinder with an open top.

[0011] This solution allows users to better add sodium hydroxide solution to the pressure relief and purification chamber, so that the introduced hydrogen sulfide gas can be better absorbed.

[0012] Preferred technical solution four: The end of the mounting socket is in a semi-circular arc shape.

[0013] This solution allows the delivery connection pipe to pass through the installation socket more effectively.

[0014] Preferred technical solution five: The inner diameter of the intake buffer pipe is larger than the inner diameter of the pressure relief exhaust pipe.

[0015] This design allows the high pressure entering the intake buffer pipe to be buffered and then enter the pressure relief exhaust pipe.

[0016] Compared with the prior art, this utility model provides an oil well pressure relief device, which has the following beneficial effects:

[0017] (1) This utility model provides an oil well safety pressure relief component on the side of the oil well pipe, while the oil well pipe is used for normal connection after pressure relief. Before oil production, the second valve on the pressure relief pipe in the oil well safety pressure relief component is opened and the first valve is closed, so that the high pressure gas containing hydrogen sulfide in the oil well pipe is transported to the air intake buffer pipe through the pressure relief pipe, and then discharged through several pressure relief and exhaust holes evenly opened on the bottom side of the pressure relief and exhaust pipe. In addition, an appropriate sodium hydroxide solution is injected into the pressure relief and purification box in advance, so that the hydrogen sulfide discharged into the solution through the pressure relief and exhaust holes is effectively absorbed. While the oil well is depressurized, the hydrogen sulfide gas contained in the depressurized gas can be absorbed and treated, avoiding the emission into the air and polluting the environment. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is a side view of the structure of this utility model;

[0020] Figure 3 For the present utility model Figure 2 Enlarged view of the structure of the mounting socket;

[0021] Figure 4 For the present utility model Figure 2 A schematic diagram of the structure of the connecting frame of the middle box wall.

[0022] In the diagram: 1. Well casing; 2. Well casing cap; 3. Production tubing; 4. First valve; 5. Well safety relief assembly;

[0023] 501. Pressure relief pipe; 502. Second valve; 503. Pressure relief purification box; 504. Casters; 505. Top closing cover; 506. Mounting socket; 507. Output hose; 508. Box wall connection frame; 509. Air inlet buffer pipe; 510. Pressure relief exhaust pipe; 511. Pressure relief exhaust port; 512. Conveying connection pipe; 513. Hydrogen sulfide detector; 514. Drain pipe; 515. Closing valve. Detailed Implementation

[0024] Please see Figure 1-4 ,

[0025] Example 1: An oil well pressure relief device includes an oil well pipe 1, a well pipe closure cover 2 is provided at the top of the oil well pipe 1, an oil well pipe 3 is connected to one side of the well pipe closure cover 2, a first valve 4 is provided on the oil well pipe 3, and an oil well safety pressure relief component 5 is provided on the other side of the well pipe closure cover 2.

[0026] The oil well safety pressure relief assembly 5 includes a pressure relief pipe 501 connected to the well casing closure cover 2, a second valve 502 installed on the pressure relief pipe 501, a pressure relief purification box 503 installed on the side of the oil well casing 1, movable wheels 504 evenly arranged around the bottom of the pressure relief purification box 503, a top closure cover 505 rotatably installed on the top of the pressure relief purification box 503, an installation socket 506 opened in the middle of the side of the top closure cover 505, an output hose 507 connected to the end of the pressure relief pipe 501, a box wall connecting frame 508 installed inside the pressure relief purification box 503, and an air inlet buffer pipe 509 installed at the top of the box wall connecting frame 508.

[0027] The bottom end of the air intake buffer pipe 509 is evenly connected to several pressure relief exhaust pipes 510. Several pressure relief exhaust holes 511 are evenly opened on both sides of the bottom end of the pressure relief exhaust pipes 510. The top end of the middle part of the air intake buffer pipe 509 is connected to a conveying connection pipe 512. The top end of the conveying connection pipe 512 passes through the middle part of the box wall connecting frame 508. A hydrogen sulfide detector 513 is installed at the top end of the conveying connection pipe 512. The end of the output hose 507 is connected to the hydrogen sulfide detector 513. The bottom end of the side of the pressure relief purification box 503 is connected to a drain pipe 514. A closing valve 515 is installed on the drain pipe 514.

[0028] Example 2: The difference between this example and Example 1 is that the pressure relief purification box 503 is a rectangular cylinder with an opening at the top.

[0029] This allows users to better add sodium hydroxide solution to the pressure relief and purification box 503, so that the introduced hydrogen sulfide gas can be better absorbed.

[0030] Example 3: The difference between this example and Example 1 is that the end of the mounting socket 506 is in the shape of a semi-circular arc.

[0031] This allows the delivery connection pipe 512 to pass through the mounting socket 506 more easily.

[0032] Example 4: The difference between this example and Example 1 is that the inner diameter of the intake buffer pipe 509 is larger than the inner diameter of the pressure relief exhaust pipe 510.

[0033] This allows the high pressure entering the intake buffer pipe 509 to be buffered and then enter the pressure relief exhaust pipe 510.

[0034] In this embodiment, when existing oil well pressure relief devices are actually used, oil wells that have been shut down for a long time not only accumulate a large amount of pressure inside, but also produce hydrogen sulfide gas. However, traditional pressure relief methods are difficult to deal with hydrogen sulfide gas, and rashly releasing it will cause environmental pollution.

[0035] In summary, in specific implementation, when the user needs to depressurize the pressurized gas containing hydrogen sulfide generated in the oil well pipe 1 before oil production, the user first injects an appropriate amount of sodium hydroxide solution into the pressure relief and purification tank 503 in the oil well safety pressure relief component 5, and then opens the second valve 502 set on the pressure relief pipe 501, so that the high-pressure gas in the oil well pipe 1 is transported to the output hose 507 through the pressure relief pipe 501. The top of the transmission connection pipe 512 is equipped with a hydrogen sulfide detector 513, which is connected to the output hose 507.

[0036] This allows the high-pressure hydrogen sulfide-containing gas passing through the hydrogen sulfide detector 513 to be detected by the hydrogen sulfide detector 513. When the hydrogen sulfide gas enters the hydrogen sulfide detector 513, and the hydrogen sulfide detector 513 is the existing QRAE3 PGM-2500 model, an electrochemical reaction occurs, generating a current signal proportional to the hydrogen sulfide concentration. The hydrogen sulfide detector 513 converts this signal into a digital display, allowing for real-time reading of the hydrogen sulfide concentration value, thus enabling continuous detection of the hydrogen sulfide concentration in the gas.

[0037] The high-pressure gas passing through the hydrogen sulfide detector 513 continues to enter the intake buffer pipe 509 through the delivery connection pipe 512. Several pressure relief and exhaust pipes 510 are evenly arranged at the bottom end of the intake buffer pipe 509. Several pressure relief and exhaust holes 511 are evenly opened on both sides of the bottom end of the pressure relief and exhaust pipes 510. The sodium hydroxide solution injected into the pressure relief and purification box 503 will submerge the pressure relief and exhaust holes 511.

[0038] This allows the hydrogen sulfide in the pressure relief gas containing hydrogen sulfide introduced into the sodium hydroxide solution through the pressure relief vent 511 to be absorbed by the solution, while the remaining high-pressure gas is discharged into the air through the installation port 506. This achieves the purpose of relieving the high-pressure gas containing hydrogen sulfide in the oil well pipe 1, and at the same time, it can absorb and treat the hydrogen sulfide contained in the high-pressure gas, making the discharge into the air safer and cleaner, avoiding environmental pollution, and making it more convenient for users.

[0039] Furthermore, since the pressure relief purification box 503 is equipped with casters 504 at the bottom, it is more convenient to move and use the pressure relief purification box 503. The drain pipe 514 can quickly and easily discharge the solution that has absorbed hydrogen sulfide in the pressure relief purification box 503, making it more convenient to use.

Claims

1. An oil well pressure relief device, comprising an oil well pipe (1), characterized in that: The top of the oil well pipe (1) is provided with a well pipe closing cover (2), one side of the well pipe closing cover (2) is connected to the oil pipe (3), the oil pipe (3) is provided with a first valve (4), and the other side of the well pipe closing cover (2) is provided with an oil well safety pressure relief component (5). The oil well safety pressure relief assembly (5) includes a pressure relief pipe (501) connected to the well casing closure cover (2), a second valve (502) installed on the pressure relief pipe (501), a pressure relief purification box (503) installed on the side of the oil well casing (1), casters (504) evenly arranged around the bottom of the pressure relief purification box (503), a top closure cover (505) rotatably installed on the top of the pressure relief purification box (503), an installation socket (506) opened in the middle of the side of the top closure cover (505), and a transmission line connected to the end of the pressure relief pipe (501). The pressure relief purification box (503) is equipped with a box wall connecting frame (508), and an air inlet buffer pipe (509) is provided at the top of the box wall connecting frame (508). Several pressure relief exhaust pipes (510) are evenly connected to the bottom end of the air inlet buffer pipe (509). Several pressure relief exhaust holes (511) are evenly opened on both sides of the bottom end of the pressure relief exhaust pipe (510). A conveying connecting pipe (512) is connected to the top end of the middle part of the air inlet buffer pipe (509). The top end of the conveying connecting pipe (512) passes through the middle part of the box wall connecting frame (508).

2. The oil well pressure relief device according to claim 1, characterized in that: The top end of the delivery connecting pipe (512) is equipped with a hydrogen sulfide detector (513), and the end of the output hose (507) is connected to the hydrogen sulfide detector (513).

3. The oil well pressure relief device according to claim 2, characterized in that: The bottom end of the side of the pressure relief purification box (503) is connected to a drain pipe (514), and a closing valve (515) is installed on the drain pipe (514).

4. The oil well pressure relief device according to claim 3, characterized in that: The pressure relief purification box (503) is a rectangular cylinder with an open top.

5. The oil well pressure relief device according to claim 4, characterized in that: The end of the mounting socket (506) is semi-circular.

6. The oil well pressure relief device according to claim 5, characterized in that: The inner diameter of the intake buffer pipe (509) is larger than the inner diameter of the pressure relief exhaust pipe (510).

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