High-pressure relief valve for oil field

Abstract

The utility model relates to the technical field of pressure release valves, and discloses an oil field high-pressure pressure release valve which comprises an oil well connecting pipe, two connecting screw grooves are symmetrically formed in the upper end and the lower end of the oil well connecting pipe, an oil discharge pipe is arranged on the side edge of the oil well connecting pipe, and an oil well pressure release assembly is arranged at the top of the oil well connecting pipe. The oil well pressure relief assembly is arranged at the top of the oil well connecting pipe, a closed inserting cylinder in the oil well pressure relief assembly can move upwards under the pushing of high-pressure gas entering the oil well connecting pipe, a stable connecting ring is arranged at the top end of a sealing rubber ring sleeve, and the stable connecting ring can move upwards under the elastic abutting action of a connecting spring. The anti-skid rubber ring sleeve can always provide anti-skid collision force for the sealing rubber ring sleeve, it is guaranteed that the sealing rubber ring sleeve is always stabilized at the bottom of the pressure relief connecting cylinder, the outer side of the closed inserting cylinder is well sealed, the problem of crude oil leakage cannot be caused, and use is safer and more reliable.

Description

Technical Field

[0001] This utility model relates to the field of pressure relief valve technology, specifically a high-pressure pressure relief valve for oil fields. Background Technology

[0002] In the field of oil extraction, high-pressure relief valves play a crucial role. With the continuous development of oil exploration and extraction technologies, the oilfield extraction environment is becoming increasingly complex, and the requirements for the reliability and safety of equipment are also becoming higher and higher.

[0003] A search revealed that this utility model, authorized by Chinese Patent Publication No. CN 209084071 U, discloses a pressure relief valve for ultra-high pressure equipment, comprising: a pressure relief valve body, a power mechanism, a high-pressure pipe, a check nut, and a pressure cap. The pressure relief valve body contains a valve core and a valve seat; the power mechanism is located on top of the valve core and can drive the valve core to contact or separate from the valve seat; the high-pressure pipe is disposed within the pressure relief valve body; wherein, the high-pressure pipe and the valve seat are spirally connected by the check nut and the pressure cap. Therefore, the pressure relief valve for ultra-high pressure equipment of this utility model has a simple and reasonable structure, saves costs and maintenance time, and increases reliability and stability.

[0004] The pressure relief valve in the aforementioned patent still has certain shortcomings. Due to the long-term high pressure, the sealing rings used in the existing high-pressure relief valve are prone to wear and aging, which often leads to leakage. Crude oil leakage not only causes waste but also causes significant environmental pollution, greatly increasing the safety hazards for users. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an oilfield high-pressure relief valve, which solves the problem that the sealing rings used in existing high-pressure relief valves are prone to wear and aging under long-term high pressure, often leading to leakage. Crude oil leakage not only causes waste but also causes significant environmental pollution and greatly increases the safety hazards for users.

[0006] This utility model provides the following technical solution: a high-pressure relief valve for oil fields, including an oil well connecting pipe, two connecting screw grooves symmetrically opened at the upper and lower ends of the oil well connecting pipe, an oil discharge pipe provided on the side of the oil well connecting pipe, and an oil well pressure relief component provided on the top of the oil well connecting pipe;

[0007] The oil well pressure relief assembly includes a pressure relief connecting cylinder disposed at the top of the oil well connecting pipe. The bottom end of the pressure relief connecting cylinder is inserted into the connecting screw groove. A push-moving connecting plate is disposed inside the pressure relief connecting cylinder. A closed insert is fixed at the bottom end of the push-moving connecting plate. A pressure relief port is opened on the side of the closed insert. A limit connecting rod is vertically disposed at the top of the push-moving connecting plate. The top end of the limit connecting rod penetrates the top of the pressure relief connecting cylinder. An anti-collision spring is sleeved on the outside of the limit connecting rod. One end of the anti-collision spring is connected to the rod body of the limit connecting rod, and the other end of the anti-collision spring is connected to the inner wall of the pressure relief connecting cylinder.

[0008] A limiting contact ring is fixed in the middle of the pressure relief connecting cylinder, and several vent holes are evenly opened on the limiting contact ring. A pressure relief hole is opened on the side of the top of the pressure relief connecting cylinder. A sealing rubber ring is fitted on the outer side of the closed insert, and the sealing rubber ring is inserted between the outer wall of the closed insert and the inner wall of the bottom side of the pressure relief connecting cylinder. A stabilizing connecting ring is fixed at the top of the sealing rubber ring, and the stabilizing connecting ring is slidably inserted into the bottom of the pressure relief connecting cylinder. Several limiting posts are evenly fixed at the bottom of the pressure relief connecting cylinder, and the top of each limiting post passes through the stabilizing connecting ring. A connecting spring is fitted on each limiting post.

[0009] Preferred technical solution 1: One end of the connecting spring is connected to the limiting column, and the other end of the connecting spring abuts against the stabilizing connecting ring.

[0010] Preferred technical solution 2: The middle part of the oil well connecting pipe is hollow, and the bottom end of the closed insert extends to the middle part of the oil well connecting pipe.

[0011] Preferred technical solution three: The outer side of the bottom end of the pressure relief connecting cylinder is provided with a thread that matches the connecting screw groove.

[0012] This solution enables the pressure relief connecting cylinder to be threadedly connected to the top of the oil well connecting pipe.

[0013] Preferred technical solution four: A baffle is provided at the top of the limiting connecting rod.

[0014] Preferred technical solution five: The opening diameter in the middle of the limiting contact ring is smaller than the diameter of the pushing connecting plate.

[0015] This solution ensures that when the closed insert is subjected to pressure and moves upward, the upward movement of the push-moving connecting plate is limited by the resistance of the limiting contact ring.

[0016] Compared with the prior art, this utility model provides a high-pressure relief valve for oil fields, which has the following beneficial effects:

[0017] (1) This utility model has an oil well pressure relief assembly installed at the top of the oil well connecting pipe. The closed insert in the oil well pressure relief assembly can move upward under the push of the high pressure gas entering the oil well connecting pipe. The high pressure gas in the oil well connecting pipe is discharged into the pressure relief connecting cylinder through the pressure relief port and discharged through the pressure relief hole. The outer side of the closed insert is fitted with a sealing rubber ring. Compared with the traditional sealing gasket, the sealing rubber ring fits more tightly with the inner wall of the closed insert and the pressure relief connecting cylinder, and covers a wider area on the outer side of the closed insert, thus having a better wear resistance. The top of the sealing rubber ring is provided with a stabilizing connecting ring. Under the elastic resistance of the connecting spring, the stabilizing connecting ring can always provide anti-slip resistance to the sealing rubber ring, ensuring that the sealing rubber ring is always stable at the bottom of the pressure relief connecting cylinder, thus providing a good seal on the outer side of the closed insert and preventing the problem of crude oil leakage. It is safer and more reliable to use. Attached Figure Description

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

[0019] Figure 2 This is a schematic diagram of the internal cross-section of the structure of this utility model;

[0020] Figure 3 For the present utility model Figure 2 Enlarged view of the structure of the pressure relief port;

[0021] Figure 4 For the present utility model Figure 2 Enlarged view of the structure of the centrally stable connecting ring.

[0022] In the diagram: 1. Oil well connecting pipe; 2. Connecting threaded groove; 3. Oil drain pipe; 4. Oil well pressure relief assembly;

[0023] 401. Pressure relief connecting cylinder; 402. Push-moving connecting plate; 403. Closing insert; 404. Pressure relief port; 405. Limiting connecting rod; 406. Contact spring; 407. Limiting contact ring; 408. Vent hole; 409. Pressure relief hole; 410. Sealing rubber ring sleeve; 411. Stabilizing connecting ring; 412. Limiting column; 413. Connecting spring. Detailed Implementation

[0024] Please see Figure 1-4 ,

[0025] Example 1: A high-pressure relief valve for oil fields includes an oil well connecting pipe 1, two connecting screw grooves 2 symmetrically opened at the upper and lower ends of the oil well connecting pipe 1, an oil drain pipe 3 is provided on the side of the oil well connecting pipe 1, and an oil well pressure relief assembly 4 is provided on the top of the oil well connecting pipe 1.

[0026] The oil well pressure relief assembly 4 includes a pressure relief connecting cylinder 401 disposed at the top of the oil well connecting pipe 1. The bottom end of the pressure relief connecting cylinder 401 is inserted into the connecting screw groove 2. A push-moving connecting plate 402 is disposed inside the pressure relief connecting cylinder 401. A closing insert 403 is fixed at the bottom end of the push-moving connecting plate 402. A pressure relief port 404 is opened on the side of the closing insert 403. A limiting connecting rod 405 is vertically disposed at the top of the push-moving connecting plate 402. The top end of the limiting connecting rod 405 penetrates the top of the pressure relief connecting cylinder 401. An abutment spring 406 is sleeved on the outside of the limiting connecting rod 405. One end of the abutment spring 406 is connected to the rod body of the limiting connecting rod 405, and the other end of the abutment spring 406 is connected to the inner wall of the pressure relief connecting cylinder 401.

[0027] A limiting contact ring 407 is fixed in the middle of the pressure relief connecting cylinder 401. Several vent holes 408 are evenly opened on the limiting contact ring 407. A pressure relief hole 409 is opened on the side of the top of the pressure relief connecting cylinder 401. A sealing rubber ring 410 is sleeved on the outside of the closed insert 403. The sealing rubber ring 410 is inserted between the outer wall of the closed insert 403 and the inner wall of the bottom side of the pressure relief connecting cylinder 401. A stabilizing connecting ring 411 is fixed at the top of the sealing rubber ring 410. The stabilizing connecting ring 411 is slidably inserted at the bottom of the pressure relief connecting cylinder 401. Several limiting posts 412 are evenly fixed at the bottom of the pressure relief connecting cylinder 401. The top of each limiting post 412 passes through the stabilizing connecting ring 411. A connecting spring 413 is sleeved on the limiting post 412. One end of the connecting spring 413 is connected to the limiting post 412, and the other end of the connecting spring 413 abuts against the stabilizing connecting ring 411.

[0028] The middle part of the oil well connecting pipe 1 is hollow, and the bottom end of the closed insert 403 extends to the middle part of the oil well connecting pipe 1.

[0029] Example 2: The difference between this example and Example 1 is that the outer side of the bottom end of the pressure relief connecting cylinder 401 is provided with a thread that matches the connecting screw groove 2.

[0030] This allows the pressure relief connecting cylinder 401 to be threadedly connected to the top end of the oil well connecting pipe 1.

[0031] Example 3: The difference between this example and Example 1 is that a baffle is provided at the top of the limiting connecting rod 405.

[0032] Example 4: The difference between this example and Example 1 is that the opening diameter of the middle part of the limiting contact ring 407 is smaller than the diameter of the push connecting plate 402.

[0033] When the push connecting plate 402 moves upward under pressure from the closed insert 403, the upward movement of the push connecting plate 402 will be limited by the resistance of the limiting contact ring 407.

[0034] In this embodiment, due to the long-term high pressure, the sealing rings used in the existing high pressure relief valve are prone to wear and aging, which often leads to leakage. The leakage of crude oil not only causes waste but also causes significant environmental pollution, greatly increasing the safety hazards for users.

[0035] In summary, during implementation, when high-pressure gas from the oil well enters the middle of the oil well connecting pipe 1, and the pipeline connected to the oil drain pipe 3 is closed by a valve, the high-pressure gas will contact the closed insert 403 in the oil well pressure relief assembly 4 installed at the top of the oil well connecting pipe 1. This causes the closed insert 403, which is inserted at the bottom of the pressure relief connecting cylinder 401 and extends to the middle of the oil well connecting pipe 1, to move upward. When the pressure relief port 404 opened on the side of the closed insert 403 gradually moves upward and disengages from the sealing rubber ring 410 and the bottom wall of the pressure relief connecting cylinder 401, the high-pressure gas entering the closed insert 403 is discharged into the pressure relief connecting cylinder 401 through the pressure relief port 404.

[0036] Furthermore, since a limiting contact ring 407 is provided inside the pressure relief connecting cylinder 401, the limiting contact ring 407 will limit the distance that the closed insert 403 drives the pushing connecting plate 402 to move upward, preventing the closed insert 403 from moving upward and dislodging from the bottom of the pressure relief connecting cylinder 401 and making it difficult to reset and reconnect. The depressurized gas is discharged through the exhaust hole 408 and the pressure relief hole 409, thereby achieving the purpose of effective pressure relief. The limiting connecting rod 405 is fitted with a contact spring 406 on the outside. When the gas pressure in the oil well decreases less than the rebound force of the contact spring 406, the rebound force of the contact spring 406 will push the pushing connecting plate 402, thereby causing the closed insert 403 to be re-inserted into the sealing rubber ring 410, so that the end of the pressure relief port 404 is closed again.

[0037] Because the sealing rubber ring 410 is annularly fitted on the outside of the closed insert 403, and a stabilizing connecting ring 411 is provided at the top of the sealing rubber ring 410, which is in contact with the connecting spring 413 fitted on the limiting column 412, the sealing rubber ring 410 will not detach even under the up-and-down friction of the closed insert 403. Furthermore, the sealing rubber ring 410 has a relatively large wall thickness, which can withstand wear for a longer period of time, and has a longer resistance to wear and aging, thereby improving the overall pressure relief service life of the device. Compared with traditional sealing gaskets, it has a better sealing effect, will not cause crude oil leakage, and is safer and more reliable to use.

Claims

1. An oilfield high pressure relief valve comprising an oil well connection pipe (1), characterized in that: The upper and lower ends of the oil well connecting pipe (1) are symmetrically provided with two connecting screw grooves (2), the side of the oil well connecting pipe (1) is provided with an oil discharge pipe (3), and the top of the oil well connecting pipe (1) is provided with an oil well pressure relief assembly (4). The oil well pressure relief assembly (4) comprises a pressure relief connecting cylinder (401) arranged at the top end of the oil well connecting pipe (1), the bottom end of the pressure relief connecting cylinder (401) is inserted into the connecting screw groove (2), a push connecting plate (402) is arranged in the pressure relief connecting cylinder (401), the bottom end of the push connecting plate (402) is fixedly provided with a closing insertion cylinder (403), a pressure relief opening (404) is formed in the side of the closing insertion cylinder (403), a limiting connecting rod (405) is vertically arranged at the top end of the push connecting plate (402), the top end of the limiting connecting rod (405) penetrates the top of the pressure relief connecting cylinder (401), a resisting spring (406) is arranged on the outer side of the limiting connecting rod (405), one end of the resisting spring (406) is connected with the rod body of the limiting connecting rod (405), and the other end of the resisting spring (406) is connected with the inner wall of the pressure relief connecting cylinder (401). A limiting resisting ring (407) is fixedly arranged at the middle part of the pressure relief connecting cylinder (401), a plurality of exhaust holes (408) are uniformly formed in the limiting resisting ring (407), a pressure relief hole (409) is formed in the side of the top end of the pressure relief connecting cylinder (401), a sealing rubber ring (410) is arranged on the outer side of the closing insertion cylinder (403), the sealing rubber ring (410) is inserted between the outer wall of the closing insertion cylinder (403) and the inner wall of the bottom side of the pressure relief connecting cylinder (401), a stable connecting ring (411) is fixedly arranged at the top end of the sealing rubber ring (410), the stable connecting ring (411) is slidingly inserted into the bottom of the pressure relief connecting cylinder (401), a plurality of limiting stand columns (412) are fixedly arranged at the bottom end of the pressure relief connecting cylinder (401), the top ends of the limiting stand columns (412) penetrate the stable connecting ring (411), and a connecting spring (413) is arranged on the limiting stand column (412).

2. A high pressure relief valve for oilfield use as defined in claim 1, characterized in that: One end of the connecting spring (413) is connected with the limiting stand column (412), and the other end of the connecting spring (413) abuts against the stable connecting ring (411).

3. A high pressure relief valve for use in an oilfield as defined in claim 2, wherein: The middle part of the oil well connecting pipe (1) is hollow, and the bottom end of the closing insertion cylinder (403) extends to the middle part of the oil well connecting pipe (1).

4. A high pressure relief valve for use in an oilfield as defined in claim 3, wherein: The outer side of the bottom end of the pressure relief connecting cylinder (401) is provided with threads matched with the connecting screw grooves (2).

5. A high pressure relief valve for use in an oilfield as defined in claim 4, wherein: The top end of the limiting connecting rod (405) is provided with a baffle.

6. A high pressure relief valve for use in an oilfield as defined in claim 5, wherein: The opening diameter of the middle part of the limiting resisting ring (407) is smaller than the diameter of the push connecting plate (402). The top end of the limiting connecting rod (405) is provided with a baffle.

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