E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 7/20 (2006.01) E21B 3/02 (2006.01) E21B 19/00 (2006.01) E21B 19/08 (2006.01) E21B 19/084 (2006.01)
Patent
CA 2235165
The invention relates to an additional equipment for a drilling rig (10) in order to enable hauling-up and lowering, respectively, of a pipe in a borehole. On the derrick (16) of the drilling rig (10), a lower carriage (34) for a catcher means (36) of the hauling-up device is disposed. The carriage (34) is displaceable up and down along the derrick (16). An upper carriage (30) carrying a drilling machine (24) is also displaceable up and down along the derrick (16). The carriage (34) of the hauling-up device is permanently interconnected to a driven transmission mechanism (48) providing up and downward movements along the derrick (16). During the drilling operations, the two carriages (30, 34) are interconnected. During the hauling-up/lowering operations, the two carriages (30, 34) are uncoupled from each other, and, then, the carriage (30) of the drilling machine (24) is coupled to the derick (16). Thus, the same transmission mechanism (48) is used both during the drilling operations and during the hauling-up/lowering operations.
La présente invention concerne un équipement additionnel pour un appareil de forage (10), servant à remonter et à descendre un tuyau dans un trou foré. Sur le mât (16) de l'appareil de forage (10), il y a un support inférieur (34) pour un preneur (36) du dispositif de remontée. Ce support (34) peut être monté et descendu le long du mât (16). Un support supérieur (30), portant une machine de forage (24), peut aussi être monté et descendu. Le support (34) est relié en permanence à un mécanisme de transmission entraîné (48) qui assure des mouvements de montée et de descente le long du mât (16). Les deux supports (30, 34) sont reliés pendant les opérations de forage. Ils sont désaccouplés lors des opérations de montée et de descente et, alors, le support (30) de la machine de forage (24) est accouplé au mât (16). Ainsi, le même mécanisme de transmission (48) est utilisé pendant les opérations de forage et celles de remontée et de descente.
Ridout & Maybee Llp
Roynestad Tom Toralv
Underhaug Njal
LandOfFree
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