ROD PUMP WITH CATHODIC PROTECTION Russian patent published in 2024 - IPC F04B47/00 C23F13/00 E21B41/02 

FIELD: oil industry.

SUBSTANCE: invention is intended for pumping liquid from oil wells under conditions that cause intense corrosion of oilfield equipment. A deep-rod pump with cathodic protection includes a cylinder with a suction valve, a plunger with a discharge valve, and an electrode made of magnesium alloy. The cylinder is equipped with the lower and the upper couplings. At the same time, the rod pump is adapted for attaching to the column lift pipes. In this case, the cylinder is equipped with a hollow cylindrical casing, rigidly fixed in the upper part on the cylinder. Above the main suction valve, the hollow cylindrical casing is made with at least two inlet slotted filtration holes covered with a metal mesh. At the bottom, the hollow cylindrical casing is equipped with a plug. The electrode is made in the form of magnesium rings separated from each other by thrust bushings. Magnesium rings are located on the cylinder between the lower and the upper couplings, which limit the movement of the magnesium rings with thrust bushings. A pipe and a strainer are installed at the pump inlet.

EFFECT: improved reliability of the operation of a deep-rod pump with cathodic protection by ensuring protection of deep-well pumping equipment from corrosion through creating an electromotive force and protective potential in close proximity to the pump components, as well as reducing the negative abrasive effect of the lifted liquid by mechanical inclusions and corrosion products due to a change in the direction of fluid flow, after which the bulk of the deposits formed during the destruction of the cathode and other mechanical inclusions are deposited in the collection system.

1 cl, 1 dwg