FIELD: oil industry.
SUBSTANCE: connection comprises coupling with conical thread and recess made in its end face and flexible bushing mounted inside the coupling. The recess is shaped into a cone, and flexible bushing has appropriate conical surface. The inner side of the flexible bushing has entering chamfering, and the opposite side of the bushing is conical. The flexible bushing is mounted so that it occupies the ring space between the pipe surface and the conical surface of the recess and spaces between the hollows and crests of the threaded joint at the thread exit.
EFFECT: enhanced reliability.
3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| CONNECTION OF CASING PIPES OR TUBING STRINGS WITH TAPER THREAD ON ENDS IN OIL AND GAS WELLS | 2008 |
|
RU2406004C2 |
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|
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|
RU2173764C2 |
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|
RU2402672C1 |
| DEVICE FOR PROTECTION OF POWER CABLE IN A WELL | 2002 |
|
RU2249667C2 |
