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A method of core cutting and apparatus operable on a seven conductor wireline logging cable for drilling a hole in the sidewall of a drill hole which comprises an elongted housing with a hydraulically operated backup shoe mounted within the housing for wedging the housing at a selected location in t

A method of core cutting and apparatus operable on a seven conductor wireline logging cable for drilling a hole in the sidewall of a drill hole which comprises an elongted housing with a hydraulically operated backup shoe mounted within the housing for wedging the housing at a selected location in the drill hole and a hydraulic motor with a drilling bit connected thereto for rotation by the hydraulic motor. Hydraulic means are mounted within the housing and are connected to the hydraulic motor for moving the bit into drilling engagement with the sidewall of the drill hole. In one embodiment, a core cutting bit is connected to the motor for obtaining a sample of a subterranean formation at the selected location.

대표청구항 ▼

An apparatus for drilling into the sidewall of a drill hole which comprises: a support member, a shoe means mounted to said support member for movement toward and away from the sidewall of a drill hole, a hydraulic motor means mounted to said support member for movement along track means toward and

An apparatus for drilling into the sidewall of a drill hole which comprises: a support member, a shoe means mounted to said support member for movement toward and away from the sidewall of a drill hole, a hydraulic motor means mounted to said support member for movement along track means toward and away from the sidewall of a drill hole, wherein said motor means comprises a rotor, a downhole hydraulic power source remotely actuatable for radially driving said rotor, downhole power means independent of said hydraulic motor means for moving said motor means along said track means, and a drilling bit means connected to said rotor for drilling a hole.