E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
20/111
E21B 15/00 (2006.01) B66F 11/04 (2006.01) E04H 12/10 (2006.01) E04H 12/18 (2006.01) E21B 19/14 (2006.01)
Patent
CA 1207122
DELAYED DEPLOYMENT PLATFORM Abstract of the Disclosure Disclosed is a delayed deployment platform or racking board for use on oil well derricks or the like. The automatic system for delayed deployment allows the derrick rack to be utilized with very tall pump jacks or the like. The delayed deployment system does not lower the racking board until the derrick has extended sufficiently for the board to clear tall pump jacks and the like.
442084
Fletcher Ansel T.
Hunt Harlley L.
Iri International Corporation
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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