ROTARY TABLE FOR PIPE STRING Russian patent published in 2015 - IPC E21B3/04 E21B19/16 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to rotary drilling, namely to a pipe string suspension facility. The rotary table is fitted with the pipe string suspension facility and contains the rotary ring installed with a possibility of rotation around the central axis of the rotary table, meanwhile the rotary table is supported by the contact surface located perpendicular to the rotary table central axis. The rotary ring is formed by two or more sections of the ring, each of which is connected with the system containing the bearing housing section implemented with a possibility of rotation with reference to the base section. On the base contact surface of the bearing housing section the bearing housing groove is made. The corresponding base groove is made on the opposite surface of the bearing housing in the base section. The named grooves form curvilinear guide for a rolling body and have the centre of curvature coinciding with the central axis of the rotary table, the rolling diameter of the rolling body exceeds the total depth of the named grooves. In section of the bearing housing the channel is made which connects the ends of the groove of the bearing housing which contains transitional parts, each of which is fitted with a guiding part fitting into a base groove.

EFFECT: improvement of reliability of the device operation is provided.

1 cl, 5 dwg