GEAR TO RECEIVE AND FEED PIPES Russian patent published in 2003 - IPC

FIELD: round trip operations in process of hole drilling. SUBSTANCE: invention can be realized in equipment designed for manipulation with bars, casings, rising pipes outside of borehole. Gear has rack, device feeding pipes to hole and back, device transferring pipes from rack to feeding device. Device transferring pipes includes frame with guides for movement of gripper. Body of first hydraulic cylinder is made fast to frame and its rod is hinged to gripper. Guides are mounted for axial reciprocating movement. Gripper is rigidly connected to upper ends of guides. Rack and frame can turn around their horizontal axes parallel to longitudinal axes of pipes in rack. Body and rod of second hydraulic cylinder are hinged to rack and frame correspondingly. As result gripper can show axial reciprocating movement and movement in vertical plane. EFFECT: raised operational safety and convenient handling of gear. 3 cl, 4 dwg