WELL HEAD SEALING DEVICE Russian patent published in 2006 - IPC E21B33/03 

FIELD: oil production industry, particularly for well head sealing.

SUBSTANCE: device includes body with through conical central orifice comprising upper and lower flanges with annular grooves to receive sealing gaskets and releasable plugging means with grief stem sealer. The plugging means is made as stator fixed inside the body and rotor rotationally arranged in through stator boring. Unit for stator fixing inside the body is made as sliding rests with screw drive cooperating with outer stator surface. The sliding rests with screw drive are arranged in radial orifices formed in upper flange and are provided with sealing members. The rotor has through central channel for grief stem passage through the sealer secured to the rotor. The stator is provided with elastic sealing member, which seals cavity between the stator and conical groove made in the body. The stator is made as a single whole and is provided with additional sealing member made of elastic material and adapted for rotor sealing. The sealing member is made as a ring with round cross-section arranged in groove, which is made in the conical stator groove.

EFFECT: increased operational efficiency, extended range of operational functionality and simplified device structure.

3 dwg