Adjusting type high-temperature and high-pressure injection and production sealer

Abstract

The utility model relates to the technical field of oil extraction equipment, in particular to an adjusting type high-temperature and high-pressure injection and production sealer which comprises a four-way main body used for a polish rod to penetrate through, a connecting body is installed at the upper end of the four-way main body, and an upper adjusting assembly is arranged above the connecting body. At least part of the upper adjusting assembly and at least part of the lower adjusting assembly are provided with adjusting spaces for transverse adjustment and eccentric adjustment, the upper adjusting assembly and the lower adjusting assembly solve the problem that the polish rod and the sealer are synchronous, centered and coaxial, the adjusting range can reach 12 mm, the eccentric wear phenomenon is solved to the maximum extent, the service life is prolonged, and the service life is prolonged. Secondly, the first valve body and the second valve body solve the well control safety problem of the sealer under high temperature and high pressure, the automatic valve ball blowout preventer has the function of automatically and rapidly sealing a well mouth when a polished rod is broken and disengaged, the high temperature resistance of the sealer is greatly improved through the design of a sealing piece, and the service life of the sealer is prolonged. The method is suitable for oil well high-temperature steam huff and puff and oil well injection-production integrated processes.

Description

Technical Field

[0001] The utility model relates to the technical field of oil production equipment, in particular to an adjustable high-temperature and high-pressure injection and production sealer. Background Art

[0002] At present, various oil fields use a variety of sealers at the wellheads of oil production. The main purpose is to solve the problems of high temperature, high pressure, corrosion and eccentric wear during the reciprocating motion of the polished rod, while improving the life of related components, ensuring the safety and environmental protection of wellhead control, and reducing maintenance material costs and labor costs.

[0003] With the continuous research and improvement of wellhead sealers, each product can make progress in one aspect of these difficult problems. However, if the goals of well control safety, environmental protection, cost reduction and efficiency improvement are to be achieved, in-depth research and practical exploration are still needed.

[0004] Based on the analysis of the current oil field production status, the mechanism and use effect of diversified products, the practical technical problems, research directions and solutions related to sealers are summarized: The factors that affect the product and operation quality of wellhead sealers are as follows: In terms of high temperature resistance, the sealing pairs of sealers are mostly made of rubber non-metallic materials. Non-metallic seals age under long-term working conditions, and carbonization will occur under high temperatures, resulting in poor working stability and short service life.

[0005] At present, most sealers that solve eccentric wear adopt the principle of ball head swing, which cannot achieve the problem of free centering of the entire rod, such as a universal eccentric adjustment and anti-blowout rod sealer disclosed in Chinese patent announcement number "CN220203857U" and a multifunctional sucker rod sealer disclosed in Chinese patent announcement number "CN201943631 U".

[0006] However, the ball head structure or flange adjustment structure cannot fundamentally solve the eccentric wear phenomenon during actual use, resulting in the current sealer life still being able to be optimized. Based on this, we propose an adjustable high-temperature and high-pressure injection and production sealer to solve the problem of poor eccentric wear adaptability of conventional sealers. Utility Model Content

[0007] The utility model aims to solve the shortcomings of the prior art that the eccentric wear phenomenon cannot be fundamentally solved, resulting in the current sealer life still has room for optimization, and proposes an adjustable high-temperature and high-pressure injection and production sealer.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] An adjustable high-temperature and high-pressure injection and production sealer is designed, comprising a four-way main body for passing a polished rod, a connector is installed at the upper end of the four-way main body, and an upper adjustment component is arranged above the connector;

[0010] Wherein, a lower adjustment component is arranged below the cross-body, and at least part of the upper adjustment component and the lower adjustment component has an adjustment space for lateral and eccentric adjustment, and the adjustment space is used to adapt to the central axis position of the polished rod;

[0011] A first valve body and a second valve body are respectively arranged on both sides of the four-way body. The first valve body and the second valve body cooperate to hold and seal the polished rod to block the internal channel of the four-way body.

[0012] Furthermore, the upper adjustment component comprises a deflection adjustment disc core sleeved on the outside of the polished rod, and a first sealing pair adapted to the polished rod is arranged in the deflection adjustment disc core;

[0013] It also includes an upper deflection adjusting shell, which is threadedly connected to the connecting body and limits the longitudinal displacement of the deflection adjusting disk core.

[0014] Furthermore, the first sealing pair includes a packing washer and a packing filled in the top opening of the deflection adjustment disk core, and the packing washer is arranged above the packing;

[0015] Wherein, an upper pressure cap is also threadedly connected to the top of the deflection adjustment disc core, and at least a part of the upper pressure cap is stopped above the packing gasket.

[0016] Furthermore, the adjustment space is constructed between the inner cavity of the upper deflection adjustment shell and the deflection adjustment disk core, and the deflection adjustment disk core moves laterally in the adjustment space.

[0017] Furthermore, the lower adjustment component includes a lower joint which is sleeved on the outside of the polished rod, a lower adjustment shell is sleeved on the outer side of the lower joint, and the lower adjustment shell is threadedly connected to the four-way body.

[0018] Furthermore, the adjustment space is constructed between the inner cavity of the lower adjustment shell and the lower joint, and the lower joint moves laterally in the adjustment space.

[0019] Furthermore, the connector is threadedly connected to the cross body;

[0020] A blowout prevention valve seat is placed in the top opening of the connector and is threadedly connected with a valve seat joint, the valve seat joint is stopped above the blowout prevention valve seat, and a valve ball blowout prevention device is detachably connected to the side of the connector.

[0021] Furthermore, a spiral cone seal and a wear-resistant gasket are installed in the top opening of the four-way body. The wear-resistant gasket is stopped above the spiral cone seal and is limited by the lower end surface of the connector. A second sealing pair is formed between the spiral cone seal and the wear-resistant gasket and the bare rod.

[0022] Further, the first valve body includes a wing protective cap A threadedly connected to the outside of a branch pipe of the four-way body, a valve stem A is rotatably connected inside the wing protective cap A, a bearing pair A and a sealing member A are provided between the valve stem A and the wing protective cap A, wherein a sealing valve seat A sleeved with the valve stem A is also installed in the branch pipe of the four-way body;

[0023] The end of the valve stem A is threadedly connected with a valve gate A, and the valve gate A slides in the four-way body.

[0024] Further, the second valve body includes a wing cap B threadedly connected to the outside of a branch pipe of the four-way body, a valve stem B is rotatably connected inside the wing cap B, a bearing pair B and a sealing member B are provided between the valve stem B and the wing cap B, wherein a sealing valve seat B sleeved with the valve stem B is also installed in the branch pipe of the four-way body;

[0025] The end of the valve stem B is threadedly connected with a valve gate B, and the valve gate B slides in the four-way body.

[0026] The utility model proposes an adjustable high-temperature and high-pressure injection and production sealer, which has the following beneficial effects: the upper adjustment component and the lower adjustment component of the utility model solve the problem of synchronous centering and coaxiality of the light rod and the sealer, and the adjustment range can reach 12mm, which solves the eccentric wear phenomenon to the greatest extent and improves the service life. Secondly, the first valve body and the second valve body solve the well control safety problem of the sealer under high temperature and high pressure. The automatic valve ball blowout prevention device has the function of automatically and quickly sealing the wellhead when the light rod is broken. The design of the seal greatly improves the high temperature resistance of the sealer, which is suitable for high-temperature steam throughput of oil wells and integrated injection and production processes of oil wells. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the utility model.

[0028] In the figure: 1. upper pressure cap; 2. packing ring; 3. packing; 4. upper adjustment shell; 5. adjustment disk core; 6. blowout prevention valve seat; 7. valve seat joint; 8. connector; 9. valve ball blowout prevention device; 10. wear-resistant gasket; 11. valve gate A; 12. spiral cone seal; 13. sealing valve seat A; 14. sealing valve seat B; 15. wing cap A; 16. wing cap B; 17. valve stem A; 18. valve stem B; 19. seal A; 20. seal B; 21. bearing pair B; 22. bearing pair A; 23. lower joint; 24. lower adjustment shell; 25. valve gate B; 26. four-way body; 27. bare rod. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] Reference Figure 1 An embodiment of the utility model discloses an adjustable high-temperature and high-pressure injection and production sealer. Specifically, the sealer comprises a four-way body 26 for passing a polished rod 27, a connector 8 is installed at the upper end of the four-way body 26, and an upper adjustment component is arranged above the connector 8;

[0031] A lower adjustment component is disposed below the cross-body 26, and at least part of the upper adjustment component and the lower adjustment component has an adjustment space for lateral and eccentric adjustment, and the adjustment space is used to adapt to the central axis position of the polished rod 27;

[0032] A first valve body and a second valve body are respectively provided on both sides of the cross-way body 26 . The first valve body and the second valve body cooperate to hold and seal the polished rod 27 to block the internal passage of the cross-way body 26 .

[0033] That is to say, in the embodiment of the utility model, by providing an upper adjustment component and a lower adjustment component that can be laterally displaced, it is possible to maintain the same axis as the polished rod 27, thereby minimizing eccentric wear.

[0034] In some embodiments, the upper adjustment assembly of the present invention includes a deflection adjustment disc core 5 which is sleeved on the outside of the polished rod 27, and a first sealing pair adapted to the polished rod 27 is arranged in the deflection adjustment disc core 5;

[0035] It also includes an upper deflection adjusting shell 4 , which is threadedly connected to the connecting body 8 and limits the longitudinal displacement of the deflection adjusting disk core 5 .

[0036] Furthermore, in this embodiment, the first sealing pair includes a packing washer 2 and a packing 3 filled in the top opening of the deflection adjustment disk core 5. Specifically, in this embodiment, the packing 3 is configured as a modified high-temperature packing, and the packing washer 2 is configured above the packing 3.

[0037] The top of the deflection adjustment disc core 5 is also threadedly connected with an upper pressure cap 1 , and at least a portion of the upper pressure cap 1 is stopped above the packing washer 2 .

[0038] In addition, based on the above embodiments, in the present invention, an adjustment space is constructed between the inner cavity of the upper deflection adjustment shell 4 and the deflection adjustment disk core 5, and the deflection adjustment disk core 5 moves laterally in the adjustment space.

[0039] During specific assembly, the packing 3 and the packing gasket 2 are sequentially installed in the deflection adjustment disk core 5 to form a sliding seal pair with the polished rod 27 to withstand the high temperature and high pressure at the wellhead. The upper pressure cap 1 is connected to the deflection adjustment disk core 5 through threads to compress the packing. The deflection adjustment disk core 5 can achieve synchronous displacement according to the movement trajectory and the central position of the polished rod 27. In this embodiment, the adjustment displacement range is 12mm. The high-temperature packing 3, the packing gasket 2, the upper pressure cap 1 and the polished rod 27 are adjusted on the same axis by adjusting the deflection adjustment disk core 5 to minimize eccentric wear.

[0040] In some embodiments, the lower adjustment assembly in the utility model includes a lower joint 23 that is ring-circled on the outside of the light rod 27, and a lower adjustment shell 24 is sleeved on the outer side of the lower joint 23. The lower adjustment shell 24 is threadedly connected to the four-way body 26, and the four-way body 26 is a forged four-way body.

[0041] On the basis of the above embodiments, in this embodiment, the adjustment space is constructed between the inner cavity of the lower adjusting shell 24 and the lower joint 23, and the lower joint 23 moves laterally in the adjustment space. After the lower end of the lower joint 23 is inserted into the lower adjusting shell 24, the internal thread on the lower adjusting shell 24 is connected to the external thread at the lower end of the four-way body 26 and manually tightened, and the free center position of the joint sealer can be adjusted according to the movement trajectory of the light rod to minimize eccentric wear.

[0042] In some embodiments, the connector 8 of the present invention is threadedly connected to the cross body 26;

[0043] A blowout preventer seat 6 is placed in the top opening of the connector 8 and is threadedly connected with a valve seat joint 7, and the valve seat joint 7 is stopped above the blowout preventer seat 6. A valve ball blowout preventer 9 is detachably connected to the side of the connector 8, and the valve ball blowout preventer 9 is a prior art, which includes components such as a spring and a ball. When the light rod 27 is detached, the ball rolls outward to seal the blowout preventer seat 6 to prevent oil from spraying outward. The specific structure is a conventional method used by technicians in the field and will not be elaborated here.

[0044] During the specific connection, the blowout preventer seat 6 is installed in the inner cavity of the connector 8, the valve seat joint 7 is connected to the upper end of the connector 8 through a thread, and the blowout preventer seat 6 is pressed tightly, and is used with the valve ball blowout preventer 9. Once the light rod 27 is disconnected, the valve ball in the valve ball blowout preventer 9 automatically enters the inner cavity of the connector 8 under the action of the spring to form a seal with the valve ball blowout preventer 9, which plays a role in rapid and automatic blowout prevention at the wellhead, and wins time for taking the next step of wellhead control measures.

[0045] In some embodiments, in the embodiments of the utility model, a spiral cone seal 12 and a wear-resistant gasket 10 are installed in the top opening of the four-way body 26, and the wear-resistant gasket 10 is stopped above the spiral cone seal 12 and is limited by the lower end surface of the connector 8, and a second sealing pair is formed between the spiral cone seal 12 and the wear-resistant gasket 10 and the light rod 27.

[0046] Specifically, after the spiral cone seal 12 is installed into the inner cavity at the upper end of the four-way body 26, the wear-resistant gasket 10 is installed on the spiral cone seal 12, and the rotating connector 8 can compress the spiral cone seal 12 as the secondary dynamic seal pair of the light rod. The spiral cone seal 12 is an integrated high-temperature resistant spiral seal. The material is added with lubricating components, which can reduce wear, extend service life, and is quick and convenient to replace.

[0047] In some embodiments, the first valve body in the utility model includes a wing cap A15 threadedly connected to the outside of a branch pipe of the four-way body 26, a valve stem A17 is rotatably connected inside the wing cap A15, a bearing pair A22 and a seal A19 are provided between the valve stem A17 and the wing cap A15, wherein a sealing valve seat A13 sleeved with the valve stem A17 is also installed in the branch pipe of the four-way body 26;

[0048] The end of the valve stem A17 is threadedly connected with a valve gate A11 , and the valve gate A11 slides in the four-way body 26 .

[0049] Install a plane bearing and a radial ball bearing in the bearing pair A22 on the left end shaft of the valve stem A17, and then put the sealing valve seat A13 on the outside of the bearing pair A22. The valve gate A11 is connected to the left end of the valve stem A17 through a thread. A plane bearing in the bearing pair A22 is installed on the right end shaft of the valve stem A17. Then install the modified high-temperature seal A19 on the right end shaft of the valve stem A17 in turn, and insert the above components into the side wing cap A15, and install them along the raised track in the right end hole of the four-way body 26. The valve stem A17 is connected to the right end of the four-way body 26 through the internal thread on the side cap A15. The valve gate A11 is driven to reciprocate along the track of the four-way body 26 through the rotation of the valve stem A17. The leftward movement seals the polished rod 27 and the upper sealing component can be safely replaced. The rightward movement can form a valve line seal with the sealing valve seat A13 to ensure that high-temperature and high-pressure oil and gas do not leak. The valve gate A11 and the sealing valve seat A13 are both made of alloy materials and have excellent properties of high temperature resistance, corrosion resistance and high pressure resistance.

[0050] Furthermore, in this embodiment, the second valve body includes a wing cap B16 threadedly connected to the outside of a branch pipe of the four-way body 26, a valve stem B18 is rotatably connected inside the wing cap B16, a bearing pair B21 and a seal B20 are provided between the valve stem B18 and the wing cap B16, wherein a sealing valve seat B14 sleeved with the valve stem B18 is also installed in the branch pipe of the four-way body 26;

[0051] The end of the valve stem B18 is threadedly connected with a valve gate B25 , and the valve gate B25 slides in the four-way body 26 .

[0052] Install a plane bearing and a radial ball bearing in the bearing pair B21 on the right end shaft of the valve stem B18, then put the sealing valve seat B14 on the outside of the bearing pair B21, and the valve gate B25 is connected to the left end thread of the valve stem B18 through a thread. A plane bearing in the bearing pair B21 is installed on the left end shaft of the valve stem B18, and then install the modified high-temperature seal B20 on the left end shaft of the valve stem B18 in turn, and insert the above components into the side wing cap B16, and then install them along the raised track in the left end hole of the forged four-way body 26, and connect them with the external thread on the left end of the four-way body 26 through the internal thread on the side wing cap B16.

[0053] The rotational movement of the valve stem A17 and the valve stem B18 drives the valve gate A11 and the valve gate B25 to make linear reciprocating motion along the track of the four-way body 26. If they move toward the center of the four-way body 26, they will hold the sealing rod 27 tightly to cut off the overflow pressure channel of the wellhead, so that the upper sealing component can be safely replaced or well control measures can be taken. If they move to the left and right sides respectively, they can form a valve line seal with the sealing valve seat A13 and the sealing valve seat B14 to ensure that high-temperature and high-pressure oil and gas do not leak. The valve gate and the sealing valve seat are made of alloy materials and have excellent properties of high temperature resistance, corrosion resistance and high pressure resistance.

[0054] During assembly, the internal thread at the lower end of the connector 8 is connected to the external thread at the upper end of the cross body 26 to complete the assembly of the upper and lower sealers. After the assembled adjustable injection and production sealer is sleeved on the polished rod 27, the valve ball blowout preventer 9 is connected to the internal thread on the connector 8 through the thread, and each component is adjusted and pressed in turn.

[0055] After the spiral cone seal 12 is installed into the inner cavity at the upper end of the four-way body 26, the wear-resistant gasket 10 is installed on the spiral cone seal 12. The rotating connector 8 can compress the spiral cone seal 12 as a secondary dynamic seal pair of the light rod 27. The spiral cone seal 12 is an integrated spiral seal. The material is added with lubricating ingredients, which can reduce wear and extend the service life. It is quick and convenient to replace.

[0056] The internal thread at the lower end of the connector 8 is connected to the external thread at the upper end of the cross body 26 to complete the assembly of the upper and lower sealers. After the assembled adjustable injection and production sealer is put on the polished rod 27, the valve ball blowout preventer 9 is connected to the internal thread on the connector 8 through the thread, and each component is adjusted and tightened in turn.

[0057] After the pressure test manifold is connected to the external thread of the lower joint 23, a pressure test is carried out. After the pressure test, the adjustable injection and production sealer can be put into field production, and can seal the wellhead during process measures such as injecting steam at high temperature and high pressure, opening the downhole bridge plug, and squeezing the viscosity reducer. By adjusting the various structures of the adjustable injection and production sealer, the eccentric wear and corrosion of the light sensor can be solved to the greatest extent, and energy-saving and consumption-reducing, safe and environmentally friendly production of oil and gas wells can be achieved.

[0058] In summary, the upper adjustment component and the lower adjustment component of the utility model solve the problem of synchronous centering and coaxiality of the light rod 27 and the sealer, and the adjustment range can reach 12mm, which solves the eccentric wear phenomenon to the greatest extent and improves the service life. Secondly, the first valve body and the second valve body solve the well control safety problem of the sealer under high temperature and high pressure. The automatic valve ball blowout preventer 9 has the function of automatically and quickly sealing the wellhead when the light rod 27 is broken. The design of the seal greatly improves the high temperature resistance of the sealer, which is suitable for high-temperature steam throughput of oil wells and integrated injection and production processes of oil wells.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An adjustable high temperature and high pressure injection and production sealer, It is characterized in that It comprises a four-way main body (26) for passing a polished rod (27), a connecting body (8) is installed on the upper end of the four-way main body (26), and an upper adjustment component is arranged above the connecting body (8); A lower adjustment component is provided below the cross-connect body (26), and at least a portion of the upper adjustment component and the lower adjustment component has an adjustment space for lateral and eccentric adjustment, and the adjustment space is used to adapt to the central axis position of the polished rod (27); A first valve body and a second valve body are respectively arranged on both sides of the four-way body (26), and the first valve body and the second valve body cooperate to hold and seal the polished rod (27) to block the internal passage of the four-way body (26).

2. According to claim 1, an adjustable high-temperature and high-pressure injection and production sealer, Features: The upper adjustment component comprises a deflection adjustment disc core (5) sleeved on the outside of the polished rod (27), wherein a first sealing pair matched with the polished rod (27) is arranged in the deflection adjustment disc core (5); It also comprises an upper deflection adjusting shell (4), which is threadedly connected to the connecting body (8) and limits the longitudinal displacement of the deflection adjusting disc core (5).

3. The adjustable high temperature and high pressure injection and production sealer according to claim 2, Features: The first sealing pair comprises a packing washer (2) and a packing (3) filled in the top opening of the deflection adjustment disk core (5), wherein the packing washer (2) is arranged above the packing (3); An upper pressure cap (1) is also threadedly connected to the top of the deflection adjustment disc core (5), and at least a portion of the upper pressure cap (1) is stopped above the packing gasket (2).

4. The adjustable high temperature and high pressure injection and production sealer according to claim 3, Features: The adjustment space is constructed between the inner cavity of the upper deflection adjustment shell (4) and the deflection adjustment disc core (5), and the deflection adjustment disc core (5) moves laterally in the adjustment space.

5. The adjustable high temperature and high pressure injection and production sealer according to claim 1, Features: The lower adjustment assembly comprises a lower joint (23) sleeved on the outside of the polished rod (27), a lower adjustment shell (24) sleeved on the outer side of the lower joint (23), and the lower adjustment shell (24) is threadedly connected to the four-way body (26).

6. The adjustable high temperature and high pressure injection and production sealer according to claim 5, Features: The adjustment space is constructed between the inner cavity of the lower adjustment shell (24) and the lower joint (23), and the lower joint (23) moves laterally in the adjustment space.

7. The adjustable high temperature and high pressure injection and production sealer according to claim 1, Features: The connecting body (8) is threadedly connected to the cross body (26); A blowout prevention valve seat (6) is placed in the top opening of the connecting body (8) and is threadedly connected to a valve seat joint (7), wherein the valve seat joint (7) stops above the blowout prevention valve seat (6), and a valve ball blowout prevention device (9) is detachably connected to the side of the connecting body (8).

8. The adjustable high temperature and high pressure injection and production sealer according to claim 1, Features: A spiral cone seal (12) and a wear-resistant gasket (10) are installed in the top opening of the four-way body (26); the wear-resistant gasket (10) is stopped above the spiral cone seal (12) and is limited by the lower end surface of the connector (8); a second sealing pair is formed between the spiral cone seal (12) and the wear-resistant gasket (10) and the bare rod (27).

9. The adjustable high temperature and high pressure injection and production sealer according to claim 1, Features: The first valve body comprises a wing protective cap A (15) threadedly connected to the outside of a branch pipe of the four-way body (26), a valve stem A (17) is rotatably connected inside the wing protective cap A (15), a bearing pair A (22) and a sealing member A (19) are arranged between the valve stem A (17) and the wing protective cap A (15), wherein a sealing valve seat A (13) sleeved with the valve stem A (17) is also installed in the branch pipe of the four-way body (26); The end of the valve stem A (17) is threadedly connected to a valve gate A (11), and the valve gate A (11) slides in the four-way body (26).

10. The adjustable high temperature and high pressure injection and production sealer according to claim 1, Features: The second valve body comprises a wing protective cap B (16) threadedly connected to the outside of a branch pipe of the four-way body (26), a valve stem B (18) is rotatably connected inside the wing protective cap B (16), a bearing pair B (21) and a sealing member B (20) are arranged between the valve stem B (18) and the wing protective cap B (16), wherein a sealing valve seat B (14) sleeved with the valve stem B (18) is also installed in the branch pipe of the four-way body (26); The end of the valve stem B (18) is threadedly connected with a valve gate B (25), and the valve gate B (25) slides in the four-way body (26).

Images