Wells – Expansible anchor or casing – Liner hanger
Reexamination Certificate
2005-07-12
2005-07-12
Tsay, Frank S. (Department: 3672)
Wells
Expansible anchor or casing
Liner hanger
C166S117700, C166S382000
Reexamination Certificate
active
06915846
ABSTRACT:
A production tubing joint is disclosed for a well comprising a barrel forming an upper tubing section and connected to the tubing hanger, a tubing connector within the barrel having a lower end connected to a lower tubing section of the production tubing string, a lower locking means having a first lower lock component secured to the barrel and a second lower lock component secured to the tubing connector and selectively engageable with the first lower lock component for suspending the tubing connector and the lower tubing section from the barrel, an adapter bar for connection to a rod string, and an upper locking means having a first upper lock component secured to the tubing connector and a second upper lock component secured to the adapter bar and selectively engageable with the first upper lock component. When the upper locking means are engaged, the adapter bar may be manipulated to disengage the lower locking means so as to separate the lower tubing section from the barrel and suspend the tubing connector and the lower tubing section from the adapter bar. This enables cleaning out sand from a well bore without unseating the tubing hanger, and the operation can be completed using flushby units rather than a service rig.
REFERENCES:
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patent: 6009941 (2000-01-01), Haynes
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patent: 6447021 (2002-09-01), Haynes
patent: 2296195 (2001-05-01), None
Aikins Patent Company
Thrift Murray E.
Tsay Frank S.
LandOfFree
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