Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Reexamination Certificate
2004-10-11
2010-02-02
Bagnell, David J (Department: 3672)
Wells
Conduit wall or specific conduit end structure
Downhole coupling or connector
C166S380000, C166S381000, C285S390000
Reexamination Certificate
active
07654316
ABSTRACT:
A releasable connector (10) for joining tubular members in a well bore. The connector (10) is a mating screwthread (38, 58) which is terminated on each member by abutting projections (24, 64), operating as a ratchet. This ensures torque is transmitted between the members in a uni-directionally manner so that make-up torque is never applied to the screwheads when torque is applied to the members. A running tool (12) and a method of setting a liner in a well bore is also described which incorporate the connector (10) so that the liner may be part of a drill string and is left cemented in place in the well, after drilling is complete.
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patent: 392878 (1924-03-01), None
patent: WO 00/57020 (2000-09-01), None
Andrish Sean D
Bagnell David J
Osha • Liang LLP
Specialised Petroleum Services Group Limited
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