E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 4/02 (2006.01) E21B 3/00 (2006.01) E21B 7/00 (2006.01) E21B 15/00 (2006.01) E21B 17/00 (2006.01) E21B 19/00 (2006.01)
Patent
CA 2237309
A method and apparatus for controlling reactive torque on a drill string while drilling. The apparatus includes a housing and a tubular mandrel. The housing has a flow passage extending therethrough. The tubular mandrel is rotatably mounted to the housing coaxially with an outlet of the fluid flow passage. Fluids exiting through the outlet of the fluid flow passage pass through the tubular mandrel. A ratchet mechanism is used for controlling rotation of the tubular mandrel so that the tubular mandrel rotates freely in a clockwise direction and does not rotate in a counterclockwise direction. In accordance with the method, the apparatus is suspended from a service rig with a drill string coupled to the tubular mandrel. When positioned, as described, the apparatus resists reactive torque acting upon the drill string.
Brown Garry
Honan Hugh Michael
Laird William
Mcgillivray Miles
Brown Garry
Honan Hugh Michael
Laird William
Mcgillivray Miles
Tartan Controls Inc.
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