CN222558480U - A corrosion-resistant oil casing coupling - Google Patents
A corrosion-resistant oil casing coupling Download PDFInfo
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- CN222558480U CN222558480U CN202421441425.1U CN202421441425U CN222558480U CN 222558480 U CN222558480 U CN 222558480U CN 202421441425 U CN202421441425 U CN 202421441425U CN 222558480 U CN222558480 U CN 222558480U
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- oil casing
- pipe body
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Abstract
The utility model relates to the technical field of oil casing pipe connectors, in particular to an anti-corrosion oil casing pipe connector which comprises a connector main body, wherein drill pipes and oil casings are respectively arranged at two ends of the connector main body, the connector main body consists of a connector pipe body, a first connecting column and a second connecting column, a first annular clamping groove and a second annular clamping groove are formed in the connector pipe body, a first external thread is arranged on the first connecting column, a second external thread is arranged on the second connecting column, a first sealing sleeve and a first annular block are arranged at one end of the drill pipes, which faces the first connecting column, a second sealing sleeve and a second annular block are arranged at one end of the oil casing, which faces the second connecting column, and an anti-corrosion coating is arranged in the inner wall of the connector pipe body. The slurry drilling fluid is prevented from penetrating into the connecting part of the oil sleeve and the drilling rod, the condition that the threaded connecting part is corroded is avoided, the anti-seepage corrosion resistance of the connecting part of the oil sleeve pipe is effectively improved, and the corrosion resistance of the inner wall surface of the oil sleeve pipe joint is improved.
Description
Technical Field
The utility model relates to the technical field of oil casing joints, in particular to an anti-corrosion oil casing coupling.
Background
An oil casing coupling is a steel pipe connecting piece used in oil and gas wells in the oil and gas industry, and is mainly used for connecting an oil casing and a drill pipe.
During drilling, the oil casing joint is capable of transmitting torque so that the drill rod can rotate and break the rock.
When in specific installation, one end of the oil sleeve joint pipe is provided with a connecting oil sleeve, the other end is provided with a connecting drill rod.
At present, when the existing oil casing joint is used for breaking rock drilling through a drill rod, slurry drilling fluid exists, the slurry drilling fluid is high-specific gravity liquid composed of water, clay, chemical additives and salt, and has certain corrosiveness, although the outer wall surface of the oil casing joint has an anti-corrosion effect, however, the slurry drilling fluid can infiltrate into the connecting part of the oil casing and the drill rod, and then corrode the threaded connecting part, so that the seepage resistance and corrosion resistance of the connecting part of the oil casing joint are greatly reduced.
In addition, the inner wall surface of the oil casing coupling is low in corrosion resistance, so that the service life of the oil casing coupling is greatly reduced.
The above problems are widespread and improvements are urgently needed.
Disclosure of utility model
The utility model aims to solve the defects in the prior art, and provides an anti-corrosion oil casing coupling.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
The utility model provides an anti-corrosion oil casing coupling, includes the coupling main part, the both ends of coupling main part are equipped with drilling rod and oil casing respectively, the coupling main part comprises connect hoop body, first spliced pole, second spliced pole, first annular draw-in groove and second annular draw-in groove have been seted up on the coupling body, be equipped with first external screw thread on the first spliced pole, be equipped with the second external screw thread on the second spliced pole, the one end of drilling rod orientation first spliced pole is provided with first seal cover and first annular piece, the one end of oil casing orientation second spliced pole is provided with second seal cover and second annular piece, be equipped with corrosion-resistant coating in the inner wall of coupling body.
Further, the inside of the hooping pipe body is a hollow cavity, the corrosion-resistant coating is uniformly coated along the inner wall surface of the hollow cavity of the hooping pipe body, the corrosion-resistant coating is a Teflon coating, and the thickness of the corrosion-resistant coating is fifty to sixty micrometers.
Further, the first connecting column is arranged at the left end of the hooping pipe body, the second connecting column is arranged at the right end of the hooping pipe body, the first connecting column is in threaded connection with the drill rod through a first external thread, and the second connecting column is in threaded connection with the oil sleeve through a second external thread.
Further, the first annular clamping groove and the first annular block are connected in an extrusion mode, and the second annular clamping groove and the second annular block are connected in an extrusion mode.
Further, the first annular block and the second annular block are made of high-elastic vulcanized rubber, the side sections of the first annular block and the second annular block are of annular structures, the first annular block is arranged on the inner side of the first sealing sleeve, and the second annular block is arranged on the inner side of the second sealing sleeve.
Further, the first sealing sleeve is in extrusion sleeve joint with the outer wall surface of the left end of the coupling pipe body, and the second sealing sleeve is in extrusion sleeve joint with the outer wall surface of the right end of the coupling pipe body.
Furthermore, the first sealing sleeve and the second sealing sleeve are made of FKM fluororubber.
The anti-corrosion oil casing coupling provided by the utility model has the beneficial effects that:
1. according to the utility model, the first annular clamping groove and the second annular clamping groove structure are arranged on the coupling pipe body, the matched first sealing sleeve and the matched first annular block structure are arranged on the drill rod, and the matched second sealing sleeve and the matched second annular block structure are arranged on the oil sleeve, so that after the coupling pipe body is integrally connected and installed through threads, the inner annular extrusion sealing is realized, and meanwhile, the outer wall surface of the coupling pipe body is integrally extruded and sleeved and sealed, so that slurry drilling fluid is prevented from penetrating into the connecting part of the oil sleeve and the drill rod, the condition that the threaded connecting part is corroded is avoided, and the seepage resistance and corrosion resistance of the connecting part of the oil sleeve coupling are effectively improved.
2. According to the utility model, the corrosion-resistant coating structure is arranged on the inner wall surface of the coupling pipe body, so that the corrosion resistance of the inner wall surface of the oil casing coupling is improved, and the service life of the oil casing coupling is greatly prolonged.
Drawings
FIG. 1 is an exploded view of a first perspective of the overall structure of the present utility model;
FIG. 2 is an exploded view of a second perspective of the overall structure of the present utility model;
FIG. 3 is a schematic perspective view of the coupling body of FIG. 1 according to the present utility model;
FIG. 4 is a perspective view showing the condition of the drill pipe and the oil casing of FIG. 1 in which they are installed in connection with each other according to the present utility model;
FIG. 5 is a front cross-sectional view of the unitary structure of FIG. 4 in accordance with the present utility model;
Fig. 6 is an enlarged view of a portion of fig. 5 at Z in accordance with the present utility model.
In the figure, a coupling main body 1, a coupling pipe body 2, a first annular clamping groove 21, a second annular clamping groove 22, a first connecting column 3, a first external thread 31, a second connecting column 4, a second external thread 41, a drill rod 5, a first sealing sleeve 51, a first annular block 52, an oil sleeve 6, a second sealing sleeve 61, a second annular block 62 and a corrosion-resistant coating 7.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
Referring to fig. 1-6, an anti-corrosion oil casing coupling comprises a coupling main body 1, two ends of the coupling main body 1 are respectively provided with a drill rod 5 and an oil casing 6, the coupling main body 1 is composed of a coupling pipe body 2, a first connecting column 3 and a second connecting column 4, a first annular clamping groove 21 and a second annular clamping groove 22 are formed in the coupling pipe body 2, a first external thread 31 is formed in the first connecting column 3, a second external thread 41 is formed in the second connecting column 4, one end, facing the first connecting column 3, of the drill rod 5 is provided with a first sealing sleeve 51 and a first annular block 52, one end, facing the second connecting column 4, of the oil casing 6 is provided with a second sealing sleeve 61 and a second annular block 62, a corrosion-resistant coating 7 is arranged in the inner wall of the coupling pipe body 2, the coupling main body 1 is an oil casing, the coupling is a prior art, meanwhile, the drill rod 5 and the oil casing 6 are also a prior art, and some prior structures are not required to be drawn.
In detail, the inside of the coupling pipe body 2 is a hollow cavity, the corrosion-resistant coating 7 is uniformly coated along the inner wall surface of the hollow cavity of the coupling pipe body 2, the corrosion-resistant coating 7 is a Teflon coating, the thickness of the corrosion-resistant coating 7 is fifty to sixty micrometers, and the Teflon coating has excellent corrosion resistance and is wear-resistant and durable in body.
Further, the first connecting column 3 is disposed at the left end of the hooping pipe body 2, the second connecting column 4 is disposed at the right end of the hooping pipe body 2, the first connecting column 3 is in threaded connection with the drill pipe 5 through the first external thread 31, and the second connecting column 4 is in threaded connection with the oil casing 6 through the second external thread 41.
Still further, the first annular clamping groove 21 and the first annular block 52 are in extrusion connection, the second annular clamping groove 22 and the second annular block 62 are in extrusion connection, so that the two ends of the butt joint hoop pipe body 2 are subjected to inner side annular extrusion sealing, and the inner side one-layer anti-corrosion effect is realized.
In more detail, the first annular block 52 and the second annular block 62 are made of high-elastic vulcanized rubber, the side sections of the first annular block 52 are in an annular structure, the first annular block 52 is arranged on the inner side of the first sealing sleeve 51, the second annular block 62 is arranged on the inner side of the second sealing sleeve 61, when the first annular block 52 and the second annular block 62 are respectively extruded and inserted into the first annular clamping groove 21 and the second annular clamping groove 22 which are matched, the first annular block 52 and the second annular block 62 can be extruded and deformed to generate transverse resilience force, and the transverse resilience force can improve the anti-loosening effect of the first external threads 31 and the second external threads 41.
The high-elastic vulcanized rubber material has high elastic sealing property, excellent corrosion resistance and durability.
In general, the first sealing sleeve 51 is in extrusion sleeving connection with the outer wall surface of the left end of the coupling pipe body 2, the second sealing sleeve 61 is in extrusion sleeving connection with the outer wall surface of the right end of the coupling pipe body 2, the whole extrusion sleeving sealing is carried out on the outer wall surfaces of the left side and the right side of the coupling pipe body 2, the condition that the slurry drilling fluid can infiltrate into the connecting part of the oil sleeve and the drilling rod to corrode the threaded connecting part is avoided, and the anti-corrosion effect of the outer side layer is realized.
Finally, the first sealing sleeve 51 and the second sealing sleeve 61 are made of FKM fluororubber, the FKM fluororubber has excellent corrosion resistance, and the body has high elastic sealing performance, so that corrosion resistance is improved.
The working mode is that after the drill rod 5 is in threaded connection with the first external threads 31 on the first connecting column 3 through preset internal threads, the first annular clamping groove 21 is in extrusion socket joint with the first annular block 52, meanwhile, the first sealing sleeve 51 is used for integrally extrusion socket joint sealing of the left end outer wall surface of the connecting hoop pipe body 2, then after the oil sleeve 6 is in threaded connection with the second external threads 41 on the second connecting column 4 through preset internal threads, at the moment, the second annular clamping groove 22 is in extrusion socket joint with the second annular block 62, meanwhile, the second sealing sleeve 61 is used for integrally extrusion socket joint sealing of the right end outer wall surface of the connecting hoop pipe body 2, inner annular extrusion socket joint sealing is achieved, meanwhile, slurry drilling fluid is prevented from penetrating into the oil sleeve and the connecting part of the drill rod, and further, the condition that the threaded connecting part is corroded is avoided, and the seepage resistance and the corrosion resistance of the oil sleeve joint connecting part are effectively improved.
In addition, through set up corrosion-resistant coating 7 structure on the internal face of coupling body 2, improved the anticorrosive of the internal face of oil casing coupling itself, and then very big improvement the self life of oil casing coupling.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (7)
1. The anti-corrosion oil casing coupling comprises a coupling main body (1) and is characterized in that two ends of the coupling main body (1) are respectively provided with a drill rod (5) and an oil casing (6), the coupling main body (1) is composed of a coupling pipe body (2), a first connecting column (3) and a second connecting column (4), a first annular clamping groove (21) and a second annular clamping groove (22) are formed in the coupling pipe body (2), a first external thread (31) is arranged on the first connecting column (3), a second external thread (41) is arranged on the second connecting column (4), a first sealing sleeve (51) and a first annular block (52) are arranged at one end, facing the first connecting column (3), of the drill rod (5) and a second sealing sleeve (61) and a second annular block (62) are arranged at one end, facing the second connecting column (4), of the oil casing (6), and an anti-corrosion coating (7) is arranged in the inner wall of the coupling pipe body (2).
2. The anti-corrosion oil casing coupling according to claim 1, wherein the interior of the coupling pipe body (2) is a hollow cavity, the corrosion-resistant coating (7) is uniformly coated along the inner wall surface of the hollow cavity of the coupling pipe body (2), the corrosion-resistant coating (7) is a Teflon coating, and the thickness of the corrosion-resistant coating (7) is fifty to sixty micrometers.
3. The anti-corrosion oil casing coupling according to claim 1, wherein the first connecting column (3) is arranged at the left end of the coupling pipe body (2), the second connecting column (4) is arranged at the right end of the coupling pipe body (2), the first connecting column (3) is in threaded connection with the drill rod (5) through a first external thread (31), and the second connecting column (4) is in threaded connection with the oil casing (6) through a second external thread (41).
4. A corrosion resistant oil casing collar according to claim 1, wherein said first annular groove (21) and first annular block (52) are press fit and said second annular groove (22) and second annular block (62) are press fit.
5. The anti-corrosion oil casing coupling according to claim 1, wherein the first annular block (52) and the second annular block (62) are made of high-elastic vulcanized rubber and have annular side sections, the first annular block (52) is arranged on the inner side of the first sealing sleeve (51), and the second annular block (62) is arranged on the inner side of the second sealing sleeve (61).
6. The anti-corrosion oil casing coupling according to claim 1, wherein the first sealing sleeve (51) is in extrusion sleeve joint with the outer wall surface of the left end of the coupling pipe body (2), and the second sealing sleeve (61) is in extrusion sleeve joint with the outer wall surface of the right end of the coupling pipe body (2).
7. A corrosion resistant oil casing coupling according to claim 1, wherein the first sealing sleeve (51) and the second sealing sleeve (61) are made of FKM fluororubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421441425.1U CN222558480U (en) | 2024-06-22 | 2024-06-22 | A corrosion-resistant oil casing coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421441425.1U CN222558480U (en) | 2024-06-22 | 2024-06-22 | A corrosion-resistant oil casing coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222558480U true CN222558480U (en) | 2025-03-04 |
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ID=94761414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421441425.1U Active CN222558480U (en) | 2024-06-22 | 2024-06-22 | A corrosion-resistant oil casing coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222558480U (en) |
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2024
- 2024-06-22 CN CN202421441425.1U patent/CN222558480U/en active Active
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