DRILLING RIG ROUND TRIP COMPLEX Russian patent published in 2000 - IPC

FIELD: mining industry. SUBSTANCE: invention covers drilling equipment intended for lowering, lifting and suspending of drilling and casing strings, and ensuring performance of required manipulation with them in well drilling. Installed on drilling site is derrick, drawworks, device for fastening of drilling rope dead line. Provided on derrick are gin pole, crownblock consisting of axle with a set of working pulleys. Pulleys of travelling block are connected by drilling line loops to crownblock pulleys. They are auxiliary winch and unit for fixing of drilling line loop. Additionally introduced into design of derrick crown are fixed and movable beams. Movable beam has spring-loaded roller bearings and connected with derrick-crown frame by means of air and hydraulic cylinders. Derrick-crown frame is provided with guides of spring-loaded roller bearings. Movable beam has retainers. EFFECT: simplification of design. 4 dwg