CONNECTOR FOR TRANSMISSION OF ROTATIONAL MOMENT, SYSTEMS, DEVICES AND METHODS Russian patent published in 2018 - IPC E21B17/02 E21B17/42 F16L15/00 

FIELD: drilling of soil or rock.

SUBSTANCE: group of inventions refers to the field of drilling, namely, to downhole pipe columns with connectors for the transmission of torque. Tubular string comprises a plurality of tubular members and a plurality of connectors subjected to the action of torque connecting the plurality of tubular members. At least one connector from said plurality of connectors includes a sleeve and a pin component connected by a thread to the clutch. Pin component comprises a first shoulder for transmitting rotational moment that is in contact with the first surface of the clutch to give the specified connector of the first bearing capacity over the rotational moment, second shoulder for transmitting a rotational moment that is in contact with the second clutch surface to give the specified connector of the second bearing capacity over the rotational moment, at that the first clutch surface and the second clutch surface are not parallel, and a third shoulder for transmitting a rotational moment that is in contact with the third clutch surface to give the specified connector of the third bearing capacity over the rotational moment. At least one connector further comprises a sacrificial material disposed between the second shoulder of the pin component and the second surface of the sleeve. In this case, the sacrificial material is compressed between the pin component and the clutch in a direction not parallel to the longitudinal axis of the connector.

EFFECT: increase in the ratio of the pipe connector of the bearing capacity over the rotational moment.

19 cl, 5 dwg