VALVE FOR MAIN DRILL PIPE Russian patent published in 2019 - IPC E21B34/10 E21B21/10 F16K15/06 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry and can be applied to eliminate the filling of drilling mud on a working platform during drill-pipe connection. Valve includes a cylindrical body, with threaded connections of nipple and coupling version, placed in the internal cavity of the valve, with a rod, an elastic element placed in the annular cavity, seat, to interact with the valve. Shut-off valve body is made cone-shaped, with conical shoulders for landing on the supporting conical end of a cylindrical sleeve, which is combined in the lower part with a lantern, ensuring coaxial placement in the inner part of the body and the passage of flushing drilling fluid through the windows of the lantern, the rod is a continuation of the shut-off valve body, on which sealing cuffs are installed in its lower part, the rod is placed in a cylinder in the internal bore of which, in the upper part, sealing cuffs are installed, and in the lower part of the cylinder there are radial through holes, on the outside of the cylinder, coaxially with its radial holes, conical holes are made, to interact with the conical ends of the threaded inserts provided with longitudinal axial holes, the threaded inserts are screwed on the outside of the body, in which, in the plane of the radial holes in the cylinder, threaded radial holes are made, cylinder, in the lower part, through a cone-shaped lantern with windows is connected to a centering ring resting on a shoulder in the internal cavity of the valve body.

EFFECT: technical result consists in ensuring an increased valve life.

1 cl, 4 dwg