E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 19/02 (2006.01) E21B 15/00 (2006.01) E21B 19/16 (2006.01)
Patent
CA 2240659
An apparatus connected with a derrick, comprising two or more hydraulic piston/cylinder arrangements (10, 11) for raising and lowering a yoke (8) which travels on guide rails (7) in the derrick (1) itself. The yoke (8) comprises at least two sheaves (12) each running its own wire line (13). The sheaves (12) are rotatably attached to a rigid connection (20, 21, 24) between the sheaves (12), and the rigid connection (20, 21, 24) is rotatably connected to the upper end of each piston/cylinder arrangement (10, 11).
La présente invention concerne un équipement ayant trait à un derrick et comprenant deux, ou plus, ensembles hydrauliques piston-cylindre (10, 11) servant à hisser et à abaisser un joug (8) qui se déplace sur des rails de guidage (7) dans le derrick lui-même. Le joug (8) comprend au moins deux poulies (12), chacune agissant sur son propre câble (13). Les poulies (12) sont montées, de manière à pouvoir tourner, sur un organe de liaison rigide (20, 21, 24) situé entre elles et qui est relié, d'une manière permettant le pivotement, à l'extrémité supérieure de chaque ensemble piston-cylindre (10, 11).
Maritime Hydraulics As
Mccarthy Tetrault Llp
LandOfFree
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