| 摘要 |
<p>PIPE CAROUSEL FOR WELL-DRILLING RIG A drill pipe carousel comprises a circular pipe rack mounted for rotation about a vertical axis in a drilling mast, a rotational drive train and a push-pull mechanism for moving the rack to and from the drill string. The rack includes upper and lower support plates mounted on a hollow central support tube. The tube and plates are slotted on one side to provide an entry for the drill string into the center of the tube when the rack is moved toward the drill string. A pair of parallel flanges are mounted inside the tube in alignment with the entry for gripping the flattened gripping surfaces of the drill pipe. The rack rests on a large, slotted driven gear. The gear rotatably supported on a bearing plate connected to the push-pull mechanism. The tube is journaled in the bearing plate. A high torque, reversible hydraulic motor is mounted on the bearing plate. The motor is drivably connected to the driven gear through a train of drive gears arranged to bridge the slot as the rack is rotated. The rack has multiple storage slots arranged in either a radial or annular pattern around the central support tube.</p> |
