E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 4/00 (2006.01) E21B 4/06 (2006.01) E21B 4/14 (2006.01)
Patent
CA 2715249
The present invention generally relates to methods and apparatus for impact drilling. A drilling tool with a housing and a piston is provided. The drilling tool may be configured to impact while simultaneously rotating a drill head, independent from the rotation of a drill string. The drilling tool may include a rolling key assembly disposed between the housing and the piston that includes a bearing adapted to roll during a first direction of the piston and slide during a second direction of the piston. The drilling tool may include a clutch mechanism configured to rotate the drill head as the piston is directed in the first direction.
La présente invention se rapporte de manière générale à des procédés et à un appareil de forage à percussion. Un outil de forage comportant un logement et un piston est fourni. Loutil de forage peut être conçu pour percuter tout en faisant tourner simultanément une tête de forage, indépendamment de la rotation dun train de tiges de forage. Loutil de forage peut comprendre un ensemble clavette pivotante disposé entre le logement et le piston et comprenant un roulement conçu pour rouler pendant une première direction du piston et coulisser pendant une seconde direction du piston. Loutil de forage peut comprendre un mécanisme dembrayage conçu pour faire tourner la tête de forage lorsque le piston se dirige dans la première direction.
Bui Huy D.
Javins Brooks Howard
Deeth Williams Wall Llp
Javins Corporation
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