Patent ID: 8192128
Filing Date: 2012-06-05
Classification: E21B,Y10S

Abstract:
1. A pipe handling device comprising: a frame; a boom pivotally connected to the frame, the boom movable between a first generally horizontal position and a second generally vertically position; an arm extending outwardly of the boom when the boom is in the second position, the arm having a gripper at an end thereof opposite the boom; a first line having a first end connected to the boom, and an opposite second end connected to a connector; a first lower cable offset from linear alignment with the first line, and having a first end connected to the frame, and an opposite second end connected to the connector; a second lower cable extending in angular relationship to the first lower cable, and having a first end connected to the frame, and an opposite second end connected to the connector; an actuator having a first end connected to the frame, and an opposite second end connected to at least one of the first line, first lower cable and the connector; the first line, first lower cable and actuator applying tension to the boom when the boom is in the second position; the first line and second lower cable applying tension to the boom when the boom is in the first position; and the actuator being controllable to alter an angular relationship between the first line and the first lower cable to increase or decrease the tension on the boom when the boom is in the first position.