Pipe joints or couplings – Particular interface – Tapered
Reexamination Certificate
2007-01-09
2008-10-07
Hewitt, James M (Department: 3679)
Pipe joints or couplings
Particular interface
Tapered
C285S329000, C285S355000, C166S242100
Reexamination Certificate
active
07431348
ABSTRACT:
A drill string comprises a first drill string member having a male end; and a second drill string member having a female end configured to be joined to the male end of the first drill string member, the male end having a threaded portion including generally square threads, the male end having a non-threaded extension portion coaxial with the threaded portion, and the male end further having a bearing surface, the female end having a female threaded portion having corresponding female threads, the female end having a non-threaded extension portion coaxial with the female threaded portion, and the female end having a bearing surface. Installation methods, including methods of installing instrumented probes are also provided.
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Casper William L.
Clark Don T.
Grover Blair K.
Mathewson Rodney O.
Seymour Craig A.
Battelle Energy Alliance, LLC
Hewitt James M
Wells St. John P.S.
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