A gripping device (1) adapted for handling equipment (10) with a drill string (5), wherein an annular actuator housing (2) includes a hydraulically activated, rotatable cam disc (4) which is arranged to displace a number of locking slides (3) from a first position, in which the locking slides (3) are retracted into the actuator housing (2), and a second position, in which the locking slides (3) are in engagement with the drill string (5) extending through a centre opening (2B) in the gripping device (1), by abutting against a shoulder of a tool joint (5A) in the drill string (5), and wherein the gripping device (1) is connected to a hydraulic supply and return for the actuation of the cam disc (4) via a hydraulic coupler (8A) in a connection port (7C) on the actuator housing (2), and wherein alternately pressurizing and ventilating two adjacent actuation volumes (4A, 4B) in the cam disc (4) brings about rotation of the cam disc (4) within a sector of the cam disc (4).


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    Title :

    Gripping device for handling equipment with a drill string


    Contributors:

    Publication date :

    2021-09-16


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    E21B EARTH OR ROCK DRILLING , Erd- oder Gesteinsbohren / B66C Krane , CRANES



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