FIELD: mining.
SUBSTANCE: method for end rod disconnection from the drill string includes end rod rotation relative to the rest of the drill string in the release direction of the screw connection for partial disconnection of the end rod from the drill string and clamping assembly engagement with the partially detached end rod. The clamping assembly comprises a frame and a slide, suspended on the frame with a possibility of axial sliding relative to the frame. The slide includes rod grippers to grip and hold the end rod. The slide is displaced axially on the frame rail using at least one displacement element, to resist the axial displacement of the slide forward or backward relative to the frame. The end rod is additionally rotated in the release direction by means of rod grippers for additional disconnection of the end rod from the drill string and the relative axial position of the slide on the frame is controlled using at least one sensor to determine the release of the screw connection and rod separation from the drill string through slide and end rod axial displacement relative to the frame.
EFFECT: efficient and reliable disconnection of drill string rods.
14 cl, 8 dwg
