Oil measuring joint conversion device for eccentric wellhead

Abstract

The invention relates to an oil measuring joint conversion device for an eccentric wellhead, and relates to the field of oil exploitation measuring technology, the oil measuring joint conversion device comprises a thermal insulation sleeve, a central pipe is coaxially arranged on the thermal insulation sleeve in a penetrating manner, a sealing assembly is arranged between the central pipe and the thermal insulation sleeve, and a first connecting assembly is arranged on the central pipe; a second connecting assembly is arranged on the outer side of the sealing assembly, and an emptying cock is further arranged on the outer side of the sealing assembly. The oil and gas measuring device solves the problem that oil and gas measuring work cannot be carried out normally due to the fact that an oil outlet pipeline of an existing oil pumping unit eccentric wellhead flow path and a multiphase flowmeter cannot be connected with a back pressure pipeline.

Description

Technical Field

[0001] This application relates to the field of oil extraction metering technology, and in particular to a metering connector conversion device for eccentric wellheads. Background Technology

[0002] Currently, multiphase flow metering has become an important auxiliary tool in nuclear production. A multiphase flow meter is an instrument used to measure the flow rate of multiphase fluids (such as mixtures of oil, gas, and water). In industries such as petroleum and natural gas, multiphase flow meters are widely used to meet the need for accurate measurement of the flow rate of mixtures such as oil, gas, and water. The principle of multiphase flow meters is based on various sensors and measurement technologies, including differential pressure, thermal, ultrasonic, and nuclear flow meters. Through these sensors and measurement technologies, multiphase flow meters can achieve precise measurement of the flow rate of each component in mixtures such as oil, gas, and water, thus providing important data support for the production process.

[0003] During oil and gas measurement, some wells were equipped with eccentric wellheads. After the oil outlet was connected to the inlet pipeline of the multiphase flow meter, the outlet pipeline of the multiphase flow meter could not be connected to the back pressure pipeline, which prevented the oil and gas measurement work from proceeding normally and became a bottleneck restricting the normal operation of the oil and gas measurement work. Summary of the Invention

[0004] To address the problem that the multiphase flowmeter's oil outlet pipeline cannot be connected to the back pressure pipeline in the existing eccentric wellhead process of oil pumping units, thus preventing the normal operation of oil and gas measurement, this application provides an oil measurement connector conversion device for eccentric wellheads.

[0005] This application provides a gauging connector conversion device for eccentric wellheads, which adopts the following technical solution:

[0006] A gauging connector conversion device for eccentric wellheads includes an insulation sleeve, a central tube coaxially passing through the insulation sleeve, a sealing assembly between the central tube and the insulation sleeve, a first connecting assembly on the central tube, a second connecting assembly on the outside of the sealing assembly, and a venting cock on the outside of the sealing assembly.

[0007] By adopting the above technical solution, during use, after removing the plug of the insulation sleeve on the wellhead process, the sealing component is inserted into the inside of the insulation sleeve and fixed. The central tube is passed through the inside of the sealing component and the bottom end of the central tube is inserted into the inside of the insulation sleeve. After reaching the specified position, the central tube and the short sealing section become one. The vent cock is closed to connect the oil measurement pipeline. Oil and gas can be measured according to the operating procedure. This solves the problem that the oil measurement and gas measurement work cannot be carried out normally in the existing eccentric wellhead process of the pumping unit and the inability of the multiphase flow meter oil outlet pipeline to connect to the back pressure pipeline.

[0008] Optionally, the sealing assembly includes a sealing section, which is coaxially arranged with the insulation sleeve, and the sealing section is sealed to the insulation sleeve, and the sealing section is sleeved on the outside of the central tube.

[0009] By adopting the above technical solution, the bottom end of the sealing short section is threadedly connected to the insulation sleeve, and the sealing short section wraps around the central tube, which improves the sealing effect of the central tube, has a high pressure bearing coefficient, and can effectively prevent the occurrence of leaks.

[0010] Optionally, the sealing section includes a sealing part, and a connecting part is coaxially fixedly connected to the lower part of the sealing part. The sealing part abuts against the central tube, and a gap is left between the connecting part and the central tube to form a flow cavity. The interior of the flow cavity communicates with the interior of the insulation sleeve.

[0011] Optionally, the central tube includes a first portion at the top and a second portion below the first portion. The first portion and the second portion are fixedly connected. The outer diameter of the first portion is larger than the outer diameter of the second portion. The second portion is located inside the sealing short section, and the first portion is located outside the sealing short section. A first sealing ring is provided between the bottom end of the first portion and the sealing short section.

[0012] Optionally, the central tube is provided with a first sealing groove coaxially with respect to the sealing part, and a first sealing ring is provided inside the first sealing groove.

[0013] Optionally, the central tube is provided with a second sealing groove coaxially at the connection position with the connecting part, and a second sealing ring is provided inside the second sealing groove.

[0014] Optionally, the central tube is coaxially provided with a third sealing groove below the first sealing groove, and a third sealing ring is provided inside the third sealing groove.

[0015] Optionally, the first connecting component includes a first quick connector, and the central tube is provided with a first connecting portion relative to the position of the first quick connector, the first connecting portion being connected to the first quick connector.

[0016] Optionally, the second connecting assembly includes a second quick connector, and the sealing assembly has a second connecting portion positioned relative to the second connecting assembly, the second connecting portion being connected to the second quick connector.

[0017] Optionally, the first sealing ring, the second sealing ring, and the third sealing ring are made of fluororubber.

[0018] In summary, this application includes at least one of the following beneficial technical effects:

[0019] A gauging connector conversion device for eccentric wellheads is quick to install, easy to operate, has a reasonable sealing section design, good sealing effect, long service life, and high pressure bearing coefficient. It can effectively prevent leakage accidents and solve the problem of wellhead process modification. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a gauging connector conversion device for an eccentric wellhead, as described in an embodiment of this application.

[0021] Figure 2 This is a cross-sectional view of a gauging connector conversion device for an eccentric wellhead, as described in an embodiment of this application.

[0022] Explanation of reference numerals in the attached drawings: 1. Insulation sleeve; 11. First connecting end; 12. Second connecting end; 13. Center end; 2. Center tube; 21. First section; 22. Second section; 23. First sealing groove; 231. First sealing ring; 24. Third sealing groove; 241. Third sealing ring; 25. Second sealing groove; 251. Second sealing ring; 26. First connecting part; 261. First quick connector; 3. Sealing short section; 31. Sealing part; 32. Connecting part; 33. Second connecting part; 331. Second quick connector; 4. Flow chamber; 5. Sealing ring; 6. Venting cock. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0025] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0026] This application discloses a gauging connector conversion device for eccentric wellheads. (Refer to...) Figure 1 , Figure 2A gauging connector conversion device for eccentric wellheads includes an insulation sleeve 1 located at the wellhead. The insulation sleeve 1 is a wellhead implementation component. A central tube 2 is vertically arranged inside the insulation sleeve 1. The insulation sleeve 1 includes a first connecting end 11 located at the top, a second connecting end 12 located at the bottom, and a central end 13 located between the first connecting end 11 and the second connecting end 12. The first connecting end 11 is fixedly connected to the central end 13, and the second connecting end 12 is fixedly connected to the central end 13.

[0027] The inner wall diameter of the first connecting end 11 is larger than the inner wall diameter of the second connecting end 12, and the inner wall diameter of the first connecting end 11 is smaller than the inner wall diameter of the center end 13. The bottom end of the center tube 2 abuts against the inner wall of the second connecting end 12 and is threadedly connected. The center tube 2 and the first connecting end 11 are coaxially arranged, and the top end of the center tube 2 extends out from the position of the first connecting end 11.

[0028] The central tube 2 is a tubular structure, comprising a first portion 21 located at the top and a second portion 22 located below the first portion 21. The first portion 21 and the second portion 22 are fixedly connected and coaxially arranged relative to each other. The outer diameter of the first portion 21 is larger than the outer diameter of the second portion 22, forming a retaining plate between the first portion 21 and the second portion 22. The bottom end of the second portion 22 extends into the interior of the insulation sleeve 1 and is threadedly connected to the inner wall of the insulation sleeve 1.

[0029] In some embodiments, the central tube 2 has a total length of 480 mm, a maximum outer diameter of 73 mm with a length of 100 mm, a minimum outer diameter of 46 mm with a length of 299 mm, and an inner diameter of 25 mm; the top snap type of the minimum outer diameter is G1*1 / 4. The snap type of the upper end face of the maximum outer diameter is M48*2. The overall material is ordinary 45# steel or 316L stainless steel.

[0030] A sealing short section 3 is sleeved on the outer side of the second section 22. The sealing short section 3 is a tubular structure and is coaxially arranged with the central tube 2. The top of the sealing short section 3 is located below the first section 21, and the lower outer wall of the sealing short section 3 is located on the inner wall of the first connecting end 11 of the insulation sleeve 1. The sealing short section 3 is threadedly connected to the first connecting end 11 of the insulation sleeve 1.

[0031] The sealing section 3 includes a sealing part 31 located above and a connecting part 32 located below the sealing part 31. The sealing part 31 and the connecting part 32 are coaxially arranged and fixedly connected. The inner wall diameter of the sealing part 31 is the same as the outer wall diameter of the second section 22 of the central tube 2, so that the inner wall diameter of the sealing part 31 abuts against the outer wall diameter of the second section 22 of the central tube 2. The inner wall diameter of the sealing part 31 is smaller than the inner wall diameter of the connecting part 32, so that a flow cavity 4 is formed between the inner wall diameter of the connecting part 32 and the outer wall diameter of the second section 22 of the central tube 2. The bottom end of the flow cavity 4 is in relative communication with the interior of the insulation sleeve 1.

[0032] In some embodiments, the sealing section has a total length of 190 mm, a diameter of 74 mm, and a bottom snap type of G2*7 / 8. The inner diameter of the threaded section 150 mm from the other end face is 67 mm, and the inner diameter of the 40 mm long sealing section is 47 mm.

[0033] A sealing ring 5 is provided between the sealing short section 3 and the first section 21 of the central tube 2. The top end of the sealing ring 5 abuts against the first section 21 of the central tube 2, and the bottom end of the sealing ring 5 abuts against the sealing short section 3.

[0034] A first sealing groove 23 is coaxially provided in the second section 22 of the central tube 2 at a distance of 5mm from the bottom of the first section 21. The first sealing groove 23 is an annular groove. A first sealing ring 231 is provided inside the first sealing groove 23. The outer side wall of the first sealing ring 231 abuts against the inner side wall of the sealing short section 3.

[0035] The second part 22 of the central tube 2 is coaxially provided with a third sealing groove 24 5 mm below the first sealing groove 23. The third sealing groove 24 is an annular groove. A third sealing ring 241 is provided inside the third sealing groove 24. The outer side wall of the third sealing ring 241 abuts against the inner side wall of the sealing short section 3.

[0036] The second part 22 of the central tube 2 is coaxially provided with a second sealing ring 251 above the second connection end 12 of the insulation sleeve 1. The second sealing groove 25 is an annular groove, and the second sealing ring 251 is provided inside the second sealing groove 25.

[0037] The first sealing ring 231, the second sealing ring 251 and the third sealing ring 241 are all made of fluororubber and have a pressure resistance rating of 35MPa.

[0038] The top end of the central tube 2 is provided with a first connecting part 26, and a first quick connector 261 is provided at the position of the first connecting part 26. The first quick connector 261 is coaxially arranged with the central tube 2 and is connected to the first connecting part 26. The interior of the first quick connector 261 is in communication with the interior of the central tube 2.

[0039] A second connecting portion 33 is provided on the side wall of the sealing section 3, and a second quick connector 331 is provided at the position of the second connecting portion 33. The interior of the second connecting portion 33 is in communication with the flow cavity 4. The second quick connector 331 is coaxially arranged with the second connecting portion 33 and is connected to the second connecting portion 33. The interior of the second quick connector 331 is in communication with the interior of the second connecting portion 33. In some embodiments, the first quick connector 261 and the second quick connector 331 are made of 316L stainless steel and are 1-inch semi-finished connectors.

[0040] A venting cock 6 is also fixedly connected to the side wall of the sealing section 3. In some embodiments, the venting cock 6 is a DN15 type prefabricated cock.

[0041] When using it, first remove the plug of the insulation sleeve 1 on the wellhead process, then screw the sealing section short section into the plug of the insulation sleeve 1 and tighten it. Then screw the center tube 2 into the inner hole of the sealing section short section. After reaching the specified position, the center tube 2 and the sealing section short section become one. Close the vent cock 6 connection to the oil measurement line, and follow the operating procedure to measure oil and gas.

[0042] In this application, the term "multiple" refers to at least two or more, unless otherwise expressly defined. The terms "installed," "connected," "linked," and "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "linked" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A gauging connector conversion device for eccentric wellheads, comprising an insulation sleeve (1), characterized in that: A central tube (2) is coaxially inserted on the insulation sleeve (1). A sealing assembly is provided between the central tube (2) and the insulation sleeve (1). A first connecting assembly is provided on the central tube (2). A second connecting assembly is provided on the outside of the sealing assembly. A venting cock (6) is also provided on the outside of the sealing assembly.

2. The gauging connector conversion device for eccentric wellheads according to claim 1, characterized in that: The sealing assembly includes a sealing section (3), which is coaxially arranged with the insulation sleeve (1), and the sealing section (3) is sealed to the insulation sleeve (1), and the sealing section (3) is sleeved on the outside of the central tube (2).

3. The gauging connector conversion device for eccentric wellheads according to claim 2, characterized in that: The sealing section (3) includes a sealing part (31), and a connecting part (32) is coaxially fixedly connected to the lower part of the sealing part (31). The sealing part (31) abuts against the central tube (2), and a gap is left between the connecting part (32) and the central tube (2) to form a flow cavity (4). The interior of the flow cavity (4) is connected to the interior of the insulation sleeve (1).

4. The gauging connector conversion device for eccentric wellheads according to claim 3, characterized in that: The central tube (2) includes a first portion (21) at the top and a second portion (22) below the first portion (21). The first portion (21) and the second portion (22) are fixedly connected. The outer diameter of the outer wall of the first portion (21) is larger than the outer diameter of the outer wall of the second portion (22). The second portion (22) is located inside the sealing short section (3). The first portion (21) is located outside the sealing short section (3). A first sealing ring (231) is provided between the bottom end of the first portion (21) and the sealing short section (3).

5. The gauging connector conversion device for eccentric wellheads according to claim 3, characterized in that: The central tube (2) is coaxially provided with a first sealing groove (23) relative to the sealing part (31), and a first sealing ring (231) is provided inside the first sealing groove (23).

6. The gauging connector conversion device for eccentric wellheads according to claim 3, characterized in that: The central tube (2) is provided with a second sealing groove (25) coaxially at the connection position with the connecting part (32), and a second sealing ring (251) is provided inside the second sealing groove (25).

7. The gauging connector conversion device for eccentric wellheads according to claim 5, characterized in that: The central tube (2) is coaxially provided with a third sealing groove (24) below the first sealing groove (23), and a third sealing ring (241) is provided inside the third sealing groove (24).

8. The gauging connector conversion device for eccentric wellheads according to claim 1, characterized in that: The first connecting assembly includes a first quick connector (261), and the central tube (2) is provided with a first connecting part (26) at a position relative to the first quick connector (261), and the first connecting part (26) is connected to the first quick connector (261).

9. The gauging connector conversion device for eccentric wellheads according to claim 1, characterized in that: The second connecting assembly includes a second quick connector (331), and the sealing assembly is provided with a second connecting portion (33) relative to the position of the second connecting assembly, the second connecting portion (33) being connected to the second quick connector (331).

10. A gauging connector conversion device for eccentric wellheads according to any one of claims 5-7, characterized in that: The first sealing ring (231), the second sealing ring (251), and the third sealing ring (241) are made of fluororubber.

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