DEVICE FOR LIFTING AND LOWERING OF DRILLING DERRICK AT INSTALLATION AND REMOVAL OF DRILLING UNIT Russian patent published in 2014 - IPC E21B15/00 B66F17/00 

FIELD: mining.

SUBSTANCE: device for lifting and lowering of a drilling derrick at installation and removal of a drilling unit includes a portal, a polyspast tackle system driven from a drill winch and movable supports receiving the drilling derrick at lifting and pushing off the drilling derrick at its lowering. Each movable support is provided with a spring-loaded pusher. A pusher is installed in the housing so that it can be moved axially from a screw with a drive. The housing is installed so that it can be moved in guides rigidly fixed on the portal. The device has a control panel. A lead screw drive is electromechanical. The device includes position sensors of the spring-loaded pusher. One of them is intended for fixation of a moment of contact of the pusher to the drilling derrick and supply of a signal to the control panel to stop derrick lifting and to brake a pulley of the drill winch. The other one is intended for fixation of complete spring compression and supply of a signal to actuate the drill winch to draw the drilling derrick to supporting devices at drilling derrick lifting, as well as supply of a signal for movement of the housing with the pusher towards the portal at the derrick lifting and for movement of the housing with the pusher in an opposite direction at lowering of the drilling derrick. Position sensors of the spring-loaded pushers are of an electrical type.

EFFECT: safe operations; lower labour costs; reducing time for installation and removal of a drilling derrick and reducing the number of service personnel.

5 cl, 4 dwg