Wells – Above ground apparatus – With assembly or disassembly means
Reexamination Certificate
2009-03-16
2010-12-28
Thompson, Kenneth (Department: 3672)
Wells
Above ground apparatus
With assembly or disassembly means
C173S039000, C414S744300, C074S490010
Reexamination Certificate
active
07857044
ABSTRACT:
A manipulator apparatus carries tools for connecting drillpipes to the drillstring in a wellbore on a drilling platform. A telescopically extendable horizontal work arm is carried on a telescopically extendable vertical column, and the tools are to be mounted on a free end of the work arm. The column is manually rotatable about a vertical axis. The column and the work arm are each respectively formed of a fixed element and a telescopically extendable element. The fixed element is preferably formed of two U-profile members arranged back-to-back, and the extendable element includes an H-profile member with its web received between the webs of the two U-profile members. This forms a telescopic slide bearing of the H-profile member sliding along the two U-profile members. The hydraulic cylinders are received in the recessed spaces of the profile members.
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patent: 3780815 (1973-12-01), Barron et al.
patent: 3921820 (1975-11-01), Crockett
patent: 4005782 (1977-02-01), Crockett
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patent: 2001/0025727 (2001-10-01), Byrt et al.
patent: WO 87/04754 (1987-08-01), None
Grotherr Joern
Rueger Nils
Bible Sonya
Blohm + Voss Repair GmbH
Fasse W. F.
Fasse W. G.
Thompson Kenneth
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