DOWNHOLE VALVE Russian patent published in 2021 - IPC E21B34/14 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry, in particular to the design of a downhole valve, which can be used to operate gas, gas condensate, oil cased wells and wells to maintain reservoir pressure. The downhole valve contains a cylindrical body with circulation holes and an annular groove made on its inner surface, a removable insert. The body of the removable insert is designed to be gripped by a fishing tool. On the body of the removable insert, a collet is installed with an external protrusion made with the possibility of fixing it in the annular groove of the cylindrical body. The body of the removable insert consists of an upper and a lower part. An upper collet with an external shoulder is installed on the upper part, a lower collet with an external protrusion is attached to the lower part. On the outer surface of the lower collet, a code protrusion is additionally made, on the inner surface of the cylindrical body - a code groove. When passing through the cylindrical body, the removable insert is fixed inside it only when the coded protrusion of the lower collet coincides with the coded groove of the cylindrical body. In the initial position, the upper collet abuts against the lower collet and has the ability to axially move together with the upper part of the removable insert body relative to the lower collet after installing the code protrusion of the lower collet into the code slot of the cylindrical body. On the outer surface of the upper part of the housing of the removable insert there is a protrusion that presses and fixes the lower collet after installing its code protrusion into the code slot of the cylindrical body.

EFFECT: reducing the cost of running trips when installing several downhole valves with various removable inserts in the well by providing the ability to replace removable inserts without lifting the assembly of equipment with downhole valve bodies from the well, as well as preventing premature landing of the removable insert when it is run into the well, and ensuring reliable fixation of the insert in the corresponding body of the downhole valve.

1 cl, 3 dwg