Drilling apparatus

Details Drilling apparatus Drilling apparatus

E - Fixed Constructions

21

B

E21B 10/40 (2006.01) E21B 4/14 (2006.01) E21B 6/04 (2006.01) E21B 10/26 (2006.01)

Patent

CA 2458796

Drilling apparatus comprises a cutting structure defined by a percussive action cutte (42) and at least one other cutter. The percussive action cutter is adapted to be urged in a drilling direct ion by hydraulic pressure force, while the other cutter (43) is urged in a drilling direction by mechanical force.

L'invention concerne un appareil de forage comprenant une structure de coupe définie par une lame à percussion (42) et au moins une autre lame. La lame à percussion est conçue pour être poussée dans une direction de forage par une force de pression hydraulique, alors que l'autre lame (43) est poussée dans une direction de forage par une force mécanique.

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