Wells – Above ground apparatus – Moving tubing or cable into an existing well
Reexamination Certificate
2011-07-26
2011-07-26
Gay, Jennifer H (Department: 3676)
Wells
Above ground apparatus
Moving tubing or cable into an existing well
C166S077510, C166S075110, C166S085100, C166S085400, C166S075140
Reexamination Certificate
active
07984757
ABSTRACT:
A drilling rig with a top drive for engagement with a travelling block with a hook comprising an airlift thread compensator with an airlift box connected to a bail. The airlift box can have an airbag disposed therein. A bail pin can be engaged through the airlift box, and can be connected to the airbag. The airbag can support the top drive. Upper links can be connected to the airlift box and to a bearing housing. The bearing housing can support a stem connected to a motor, and a bearing can be disposed about the stem. Lower links can be connected to the bearing housing and to an elevator for moving tubulars. An inside blow out preventer can be connected to the stem and to a saver sub. A torque wrench can be connected to the bearing housing for gripping tubulars.
REFERENCES:
patent: 3838613 (1974-10-01), Wilms
patent: 4421179 (1983-12-01), Boyadjieff
Keast Larry G.
Shem Alan
Strickland James
Buskop Wendy
Buskop Law Group PC
Gay Jennifer H
Gottlieb Elizabeth C
Keast Larry G.
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