E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/14.4
E21B 19/14 (2006.01) E21B 19/15 (2006.01)
Patent
CA 1151144
ABSTRACT OF THE DISCLOSURE There is described a method and apparatus for trans- porting lengths of pipe between a pipe storage area and a drilling derrick. A cable support is suspended from a point substantially above the floor of the derrick. A track formed of two horizontally spaced parallel cables is suspended above the storage area, the cable track extending between the cable support and a winch which is actuatable to change the length of the cable track. Pipe grapples are suspended from the cable track to be movable therealong, the grapples being adapted to releasably grip a length of pipe. A second cable or cables are arranged to control the movement of the grapples along the cable track, these cables being attached at one end thereof to the grapples and are thereafter arranged to extend to and pass around a pulley suspended above the floor of the derrick and thereafter to extend to a second winch located adjacent the first winch connected to the cable track. The elements of the apparatus are arranged so that the length of pipe may be supported in a substantially vertical position by the grapples to thereby facilitate the connection or release of the pipe to or from a downhole length of similar pipe.
396591
G. Ronald Bell & Associates
Layton Kenneth
LandOfFree
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