Rotary power slips

Details Rotary power slips Rotary power slips

E - Fixed Constructions

21

B

255/14.2

E21B 19/10 (2006.01)

Patent

CA 1140528

ABSTRACT OF THE DISCLOSURE Improved rotary power slips having a housing for mounting in a rotary table of an earth drilling rig. Air is transferred from a stationary fluid source on the drilling rig to pneumatic cylinders carried by the housing when said housing is static to operate said slips. Transfer is accomplished by expansion of a perforated annular bladder thereby forming an expansive fluid duct between a stationary seal ring connected to the stationary fluid source and an air transfer plate which is rotatable with the housing.

371567

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