Wells – Processes – Assembling well part
Reexamination Certificate
2007-03-20
2007-03-20
Thompson, Kenneth (Department: 3672)
Wells
Processes
Assembling well part
C166S071000, C166S077300, C166S085100, C175S113000, C175S171000, C175S423000, C294S086120
Reexamination Certificate
active
10794795
ABSTRACT:
A method and apparatus for holding and turning a tubular and string of tubulars, such as casing, for make-up and drilling with the tubulars are disclosed. The apparatus generally includes a spear and a clamping head, both of which are mounted to a top drive. The spear and the clamping head can be engaged to transmit torque therebetween from the top drive. In addition, an aspect of the invention provides variable height wickers positioned on slips to enable use of the slips with variable inner diameter (ID) and weight casing without deformation or rupture of the casing. Still further, a casing collar is also provided to provide reinforcement to the casing in the area of slip contact with the casing ID.
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Bailey Thomas F.
Pietras Bernd-Georg
Vuyk, Jr. Adrian
Wilson Carl J.
Patterson & Sheridan LLP
Thompson Kenneth
Weatherford / Lamb, Inc.
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