CN211201792U - Sucker rod coupling - Google Patents
Sucker rod coupling Download PDFInfo
- Publication number
- CN211201792U CN211201792U CN201921870751.3U CN201921870751U CN211201792U CN 211201792 U CN211201792 U CN 211201792U CN 201921870751 U CN201921870751 U CN 201921870751U CN 211201792 U CN211201792 U CN 211201792U
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- sealing ring
- ring groove
- bearing surface
- larger
- sucker rod
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Abstract
A sucker rod coupling comprises a main body, an internal thread of a sucker rod is arranged in the main body, an upper pushing bearing surface is arranged at the upper part of the main body, a lower pushing bearing surface is arranged at the lower part of the main body, a wrench is arranged on the outer wall of the main body, an upper sealing ring groove is arranged on the upper pushing bearing surface, the opening width of the upper sealing ring groove is larger than the width of the bottom surface, an upper sealing ring is arranged in the upper sealing ring groove, the diameter of the upper sealing ring is larger than the opening width of the upper sealing ring groove, the top of the upper sealing ring protrudes out of the upper pushing bearing surface, a lower sealing ring groove is arranged on the lower pushing bearing surface, the lower sealing ring groove is in a dovetail shape, the opening width of the lower sealing ring groove is larger than the width of the bottom surface, a lower sealing ring is arranged in the lower sealing ring groove, the diameter of the lower sealing ring is larger than the opening width of the lower sealing ring groove, and the top of the lower sealing ring protrudes out of the lower pushing, the thread can not be corroded, the connection of the oil pumping rod can not be out of work, and the oil pumping well can normally pump oil for production.
Description
Technical Field
The utility model discloses an oil field is pumped the downhole equipment of usefulness, is the joint of connecting the sucker rod usefulness, specifically is a sucker rod coupling.
Background
The length of the sucker rod is 8-9m, if the underground depth of the matched oil-well pump is 1500m, the number of the sucker rods is 100, and the sucker rods need to be connected by a sucker rod coupling and then are put into the well. The upper end surface and the lower end surface of the prior sucker rod coupling are contacted with the pushing surface of the head of the sucker rod, and the threads are locked by the friction force generated by the contact of the upper end surface and the lower end surface of the prior sucker rod coupling and the pushing surface of the head of the sucker rod, so that the connection between the sucker rods is prevented from being disengaged. Because the threads are connected on site and at the well-descending side, oil sludge exists on site, and the oil sludge easily enters between the upper end surface and the lower end surface of the coupling of the sucker rod and the thrust surface of the head of the sucker rod, well fluid enters into the connecting threads through the thrust surface after the oil well descends, so that the threads are corroded to cause connection failure, the connection of the sucker rod is released, the oil well does not produce oil, and great economic loss is generated.
Disclosure of Invention
The utility model aims at designing a sucker rod coupling, overcoming the problem that above-mentioned exists, in preventing that well fluid from getting into the connecting thread of sucker rod and coupling, avoid taking place the connecting thread inefficacy of sucker rod.
The purpose of the utility model is realized like this: the inner part of the main body is provided with an internal thread of a sucker rod, the upper part of the main body is provided with an upper thrust bearing surface, the lower part of the main body is provided with a lower thrust bearing surface, the outer wall of the main body is provided with a wrench, the upper thrust bearing surface is provided with an upper sealing ring groove, the opening width of the upper sealing ring groove is larger than the width of the bottom surface, an upper sealing ring is arranged in the upper sealing ring groove, the diameter of the upper sealing ring is larger than the opening width of the upper sealing ring groove, the top of the upper sealing ring protrudes out of the upper thrust bearing surface, the height difference between the top of the upper sealing ring and the upper thrust bearing surface is 0.1mm-0.5mm, the lower thrust bearing surface is provided with a lower sealing ring groove, the lower sealing ring is dovetail-shaped, the opening width of the lower sealing ring groove is larger than the width of the bottom surface, the lower sealing ring is arranged in the lower sealing ring groove, and the diameter of the lower sealing ring is larger than the opening width of the lower sealing ring groove, the bottom of the lower sealing ring protrudes out of the lower bearing surface, and the height difference between the bottom of the lower sealing ring and the lower bearing surface is 0.1-0.5 mm.
The utility model has the advantages that: after the oil pumping rod is connected into the well through the coupling, well fluid cannot enter the connecting thread, the thread cannot be corroded, the connection of the oil pumping rod cannot be failed, normal oil pumping production of the oil pumping well can be guaranteed, and the oil pumping rod has remarkable economic benefits.
Drawings
Fig. 1 is a half-sectional view of an embodiment of the present invention.
Detailed Description
The following describes an embodiment of the present invention with reference to fig. 1.
As shown in the figure, the inner part of a main body 1 is provided with sucker rod internal threads 1-3, the upper part of the main body 1 is provided with an upper push bearing surface 1-1, the lower part of the main body 1 is provided with a lower push bearing surface 1-6, the outer wall of the main body 1 is provided with a wrench square 1-4, the upper push bearing surface 1-1 is provided with an upper seal ring groove 1-2, the upper seal ring groove 1-2 is in a dovetail shape, the opening width of the upper seal ring groove 1-2 is larger than the width of the bottom surface, an upper seal ring 2 is arranged in the upper seal ring groove 1-2, the diameter of the upper seal ring 2 is larger than the opening width of the upper seal ring groove 1-2, the top of the upper seal ring 2 protrudes out of the upper push bearing surfaces 1-1, the height difference of the top of the upper seal ring 2 protruding out of the upper push bearing surfaces 1-1 is 0.1mm-0.5mm, the lower seal ring groove 1-5 is arranged on the lower push bearing surfaces 1, the lower seal ring groove 1-5 is dovetail-shaped, the opening width of the lower seal ring groove 1-5 is larger than the bottom surface width, the lower seal ring 3 is installed in the lower seal ring groove 1-5, the diameter of the lower seal ring 3 is larger than the opening width of the lower seal ring groove 1-5, the bottom of the lower seal ring 3 protrudes out of the lower bearing surface 1-6, and the height difference between the bottom of the lower seal ring 3 and the lower bearing surface 1-6 is 0.1mm-0.5 mm.
The technical requirements and the processing requirements of the upper thrust bearing surface 1-1 and the lower thrust bearing surface 1-6 are the same as those of two end surfaces of the existing sucker rod coupling.
The upper sealing ring groove 1-2 and the lower sealing ring groove 1-5 are annular grooves.
The upper sealing ring groove 1-2 is in a dovetail shape, the diameter of the upper sealing ring 2 is larger than the opening width of the upper sealing ring groove 1-2, and the upper sealing ring 2 cannot be separated from the upper sealing ring groove 1-2. The lower seal ring groove 1-5 is dovetail-shaped, the diameter of the lower seal ring 3 is larger than the opening width of the lower seal ring groove 1-5, and the lower seal ring 3 cannot be separated from the lower seal ring groove 1-5.
The cross-sectional shapes of the upper sealing ring 2 and the lower sealing ring 3 can be circular, triangular and trapezoidal.
The junction of the bottom surface and the side surface of the upper seal ring groove 1-2 is an arc angle, and the junction of the bottom surface and the side surface of the lower seal ring groove 1-5 is an arc angle.
Claims (1)
1. The utility model provides a sucker rod coupling, the inside of main part (1) has sucker rod internal thread (1-3), and there are push-up bearing surface (1-1) upper portion of main part (1), and there are lower bearing surface (1-6) lower part of main part (1), has spanner side (1-4), characterized by on the outer wall of main part (1): an upper sealing ring groove (1-2) is arranged on the upper thrust bearing surface (1-1), the upper sealing ring groove (1-2) is in a dovetail shape, the opening width of the upper sealing ring groove (1-2) is larger than the bottom surface width, an upper sealing ring (2) is arranged in the upper sealing ring groove (1-2), the diameter of the upper sealing ring (2) is larger than the opening width of the upper sealing ring groove (1-2), the top of the upper sealing ring (2) protrudes out of the upper thrust bearing surface (1-1), the height difference between the top of the upper sealing ring (2) and the upper thrust bearing surface (1-1) is 0.1mm-0.5mm, a lower sealing ring groove (1-5) is arranged on the lower thrust bearing surface (1-6), the lower sealing ring groove (1-5) is in a dovetail shape, the opening width of the lower sealing ring groove (1-5) is larger than the bottom surface width, a lower sealing ring (3) is arranged in the lower sealing ring groove (1-5), the diameter of the lower sealing ring (3) is larger than the opening width of the lower sealing ring groove (1-5), the bottom of the lower sealing ring (3) protrudes out of the lower bearing surface (1-6), and the height difference between the bottom of the lower sealing ring (3) and the lower bearing surface (1-6) is 0.1mm-0.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921870751.3U CN211201792U (en) | 2019-11-01 | 2019-11-01 | Sucker rod coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921870751.3U CN211201792U (en) | 2019-11-01 | 2019-11-01 | Sucker rod coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211201792U true CN211201792U (en) | 2020-08-07 |
Family
ID=71851393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921870751.3U Active CN211201792U (en) | 2019-11-01 | 2019-11-01 | Sucker rod coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211201792U (en) |
-
2019
- 2019-11-01 CN CN201921870751.3U patent/CN211201792U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |