CABLE GUIDE FOR POWER SWIVEL OF MOBILE DRILLING UNIT Russian patent published in 2017 - IPC E21B19/84 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the field of drilling equipment, namely, to devices used in the composition of power swivels installed on mobile drilling units (MBU) and intended for the repair and overhaul of oil and gas wells. The cable guide for a power swivel of a mobile drilling unit comprises the guide linked with the swivel, the upper and lower mounting assemblies of the guide, fixed to the mast, the cable tension adjustment assembly, and is configured in the form of two cables, symmetrically arranged relative to the the mast axis and laid parallel to the borehole axis. The cables pass through the brackets mounted on the ends of the levers mounted on the housing of the power swivel mounted with the possibility of reciprocating movement along the cables. The upper ends of the cables are configured in the form of loops, in which thimbles fixed by clamps are embedded. Through said loops the bursiform brackets are threaded, by means of which the cables are suspended on the upper assemblies of mounting to the mast. The lower ends of the cables are passed through the roller assemblies which are mounted in the levers attached to the mast working platform and, via the coulters, to the ground. The upper ends of the cables are configured in the form of loops, in which thimbles fixed by clamps are embedded. The loops are threaded into the turnbuckles forks and fixed by fingers, and the other turnbuckles forks are joined by connecting links with the chains, on the other ends of which the connecting links are made, through which the chains are attached to the levers.

EFFECT: invention provides increased angular torsional stiffness of the cable guide, reducing the restrictions on the transfer torque, minimum labour input of assembling-disassembling of the power swivel to the mobile drilling unit.

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