OREANDA-NEWS. TatNIPIneft of JSC TATNEFT obtained a new patent for the downhole pump drive.

The technical device invented by the scientists of TATNEFT is used for oil production with application of downhole sucker rod pumps.

There is a tension mechanism incorporated in the new downhole sucker rod pump  (such as a chain drive) in the form of a hydraulic piston or plunger-type pump communicating with the pusher cylinder through the pressure valve for controlling the tension of the continuous flexible link.

The tension mechanism is mounted on the longitudinal slide of the drive housing and is connected with the pusher. The experts have fabricated the pusher of the tension mechanism in the form of a hydraulic cylinder-piston pair, the movable part of which backs the top pulley housing. It communicates with the feed vessel, which in turn is connected to the pump via a suction valve.

The movable part of the pump is equipped with the weight, matched to move the moveable part of   the pusher.

The proposed technical solution allows automatic, without personnel interference and stopping the drive, maintaining the continuous flexible drive link converter mechanism in optimum condition - without sagging and necking, therefore reducing the process labor intensity, as well as the cost of servicing the drive.

Application of the device proposed is expected to increase the life of the flexible link and the drive as a whole, as well as reduce dynamic loads on the downhole equipment.