E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/14.6
E21B 19/14 (2006.01) E21B 19/00 (2006.01)
Patent
CA 1055474
DEVICE FOR HANDLING AND RACKING RISER PIPES AND DRILL PIPES. Abstract of the Disclosure. Handling and racking of riser pipes in a drilling derrick on a platform by means of manipula- tors. The pipes are racked vertically on a set back platform and are displaced to and from a position above the rotary table by manipulators.
274564
Bolstad Arne M.
Mccleskey Robert W. (jr.)
Putnam Paul S.
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