CUTOFF VALVE Russian patent published in 2018 - IPC F16K17/04 E21B34/06 

FIELD: oil and gas industry.

SUBSTANCE: cut-off valve consists of detachable body, in axial channel of which there is a saddle with a center hole with an inner groove, and a number of longitudinal holes on the periphery. In the central hole of the saddle, there is a pusher with a crown that passes into the internal groove of an end valve. A cup is placed in the axial channel of the detachable body. On the outer surface of the cup, there are protrusions passing to the corresponding longitudinal grooves made in the detachable body. The protrusions extend beyond it and are covered by a clip with a nut connected to the detachable body by a thread. In the axial channel of the cup a deflector is freely installed, resting on the spring which in its turn rests on the adjusting nut in which the axial holes are made.

EFFECT: allows precise adjustment and setting of the technological mode of operation during operation without shutdown of the well and device dismantling.

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