WELL MOUTH PRESSURIZER Russian patent published in 2005 - IPC

FIELD: oil and gas industry.

SUBSTANCE: device has hollow cylindrical body with conical aperture for letting through geophysical device with cable, replaceable pressurizing insert, mounted in aperture of body, fixed and containing upper circular segments. Two moveable compacting collars are made with possible radial displacement relatively to cable axis in the moment of cable pressurization. Moveable compacting collars are supported by lower circular segments, each of which is rigidly connected to rod, having threaded end, directed outwards and connected to pressing nut, providing for transfer of compacting collars into compressed state in case of well mouth pressurization. Also present is circular disk with longitudinal groove for inserting cable and outer surface, being in contact to surface of aperture of hollow cylindrical body. Threaded ends of rods are outputted outwards through circular disk. Aperture of hollow cylindrical body is made conical. In assembled form in moment of well mouth pressurization circular disk, moveable compacting collars and circular segments form a conical surface on the outside, matching conical aperture of hollow cylindrical body and are in contact with it. The insert is held by cylindrical stops.

EFFECT: simplified construction, higher reliability.

11 dwg