초록 ▼

A tool for use downhole has an elongate body, arms movably mounted on the body and means for controlling movement of the arms between an operational position and a retracted position. Movement of the arms is controlled by a motor and a transmission, according to one aspect of the invention the arms

A tool for use downhole has an elongate body, arms movably mounted on the body and means for controlling movement of the arms between an operational position and a retracted position. Movement of the arms is controlled by a motor and a transmission, according to one aspect of the invention the arms being suspended independently of one another and in a second aspect of the invention, movement of the arms being controllable remotely from the tool.

대표청구항 ▼

A tool for use downhole comprising an elongate body, a plurality of arm means movably mounted on the body, and means for controlling movement of the arm means between an operational position in which the arm means extend outwardly with respect to the body and a retracted position, the arm means move

A tool for use downhole comprising an elongate body, a plurality of arm means movably mounted on the body, and means for controlling movement of the arm means between an operational position in which the arm means extend outwardly with respect to the body and a retracted position, the arm means movement controlling means comprising a motor, presser means movable rectilinearly in response to operation of the motor and independent resilient means located between said presser means and each of said arm means for permitting independent movement of said arm means in response to force exerted on said arm means by surrounding material.