Threaded pipe connection

Details Threaded pipe connection Threaded pipe connection

2005-05-17

2005-05-17

Bochna, David (Department: 3679)

Pipe joints or couplings

Particular interface

Tapered

C285S332400

Reexamination Certificate

active

06893057

ABSTRACT:
A coupled version of a threaded connection10includes first threads16, 38and second threads,20, 34on both elongate tubulars14, 30and a coupling45. An integral joint version50preferably includes a first and second tapered threads58, 60on each of the connected tubular bodies54, 56. The coupling preferably includes a dope entrapment cavity in one of the connected tubulars between the first and second threads. A tapered metal seal surface is provided preferably between the first and second threads. The second thread in a preferred embodiment is a hook thread with a negative rake angle. In another embodiment, the pin ends of a coupled connection may engage, with seals provided between the first and second threads on each tubular.

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