Mechanized stand handling apparatus for drilling rigs
OwnerCharles F. Cowgill, Frank J. Di Bellainventors
Life of this patent
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Abstract
Apparatus for the handling of drill collar and pipe stands and comprised of a hydraulically mechanized "Derrickman" and "Derrick Floor Hand" and associated fingerboard lock bars and all of which are adapted to remote control in the placement of the stands in a derrick, both in alignment with the rotary table and fully placed within the fingers, the stand handling mechanism being characterized by articulated arms extensible by actuator means housed entirely within the confines thereof for compactness.
Claims27
A "gripper head" for moving pipe stands in a derrick and between selective positions, the gripper head having a vertically disposed substantially flat unobstructed front face, means selectively positioning the gripper head in a disposition with the unobstructed front face thereof to oppose the side of the pipe stand to be moved, at least one pair of laterally spaced and extensible claws carried by and retractile into the confines of the gripper head behind said front face thereof, and means to extend the said claws from the unobstructed front face and into embraced engagement with a pipe stand juxtaposed to the said front face and to retract the said claws through the unobstructed front face and into the confines of the gripper head to be totally housed therein after release of the pipe stands.
A "gripper head" for moving pipe stands in a derrick and between selective positions, the gripper head having a vertically disposed unobstructed front face, means selectively positioning the gripper head in a disposition with the unobstructed front face thereof to oppose the side of the pipe stand to be moved, a pair extensible claws carried by and retractile into the gripper head on laterally spaced axes, and means to axially extend the said claws along the said spaced axes and into embraced engagement with a pipe stand juxtaposed to said front face and alternately to axially retract the said claws along the said spaced axes and into the confines of the gripper head to be housed behind said front face thereof.
A "gripper head" for moving pipe stands in a derrick and between selective positions, the gripper head having a vertically disposed unobstructed front face, means selectively positioning the gripper head in a disposition with the unobstructed front face thereof to oppose the side of the pipe stand to be moved, a pair of horizontally extensible claws slideable in a pair of rockers shiftably carried to be retractile into and one at each side of the gripper head, and means to extend the said rockers horizontally from the front face and to extend the claws into embraced engagement with a pipe stand juxtaposed to said front face and alternately to retract the said claws and the said rockers into the confines of the gripper head to be housed behind said front face thereof.
Dependencies are inferred from the claim text.