Casing running and drilling system

Details Casing running and drilling system Casing running and drilling system

E - Fixed Constructions

21

B

E21B 19/07 (2006.01)

Patent

CA 2677247

A method and apparatus for holding and turning a tubular and string of tubulars, such as casing (18), for make-up and drilling with the tubulars are disclosed. The apparatus generally includes a spear (14) and a clamping head (16), both of which are mounted to a top drive (12). 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 (154, 158) positioned on slips (48) 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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