HYDRAULIC DRIVE OF SUCKER-ROD PUMP Russian patent published in 2021 - IPC F04B47/04 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, namely to hydraulic drives of borehole deep-well pumps for oil and / or gas production. Drive includes a cylinder with a piston fixed on the wellhead, the rod of which is directed upwards and connected from above through a rod and a traverse to the polished rod of the rod string. It comprises tank with hydraulic fluid and pressure hydraulic pump communicated with tank inlet. Upper and lower cavities of the cylinder are equipped with supplying upper and lower nozzles, one of which is connected in series through the hydraulic distributor with the delivery pump and through the drain with the reservoir, and the other one – through the drain with the reservoir and the delivery pump. Cylinder is made with possibility of fixation on wellhead accessories. Thrust is made rigid, consisting of upper adapter and process extension, located above crossarm coaxially to polished rod and rigidly connected from above with adapter. Cylinder is equipped with at least one guide enveloping the elongator or the polished stock with possibility of longitudinal movement.

EFFECT: simplified design and increased reliability.

1 cl, 3 dwg