UNIVERSAL JOINT OF HIGH LOAD FOR WELL ROTARY CONTROLLED DRILLING TOOL Russian patent published in 2014 - IPC E21B7/06 E21B17/05 

FIELD: mining.

SUBSTANCE: high load capacity is achieved by applying the methods using unique mechanisms of load transfer. For example, a higher load bearing capacity can be provided by using the principle of load distribution, according to which the torsional stresses are transferred together through the universal joint pins and the side faces of the universal joint crossbars. Higher load bearing capacity can also be achieved by transferring the load through the monolithic crossbar having pins constituting with it an integral whole, and a unit of dismountable connector/clamp. In another embodiment, a higher load bearing capacity is a result of using the universal joint pins inserted from the inner side of the universal joint and screwed outwardly until complete connection with the joint connectors. Each of the embodiments of the universal joint can also be designed with the ability of the pressurised passing of the drilling solution through the joint.

EFFECT: creation of compact well drilling system comprising a universal joint with high load bearing capacity.

19 cl, 14 dwg