DEEP-WELL SUCKER-ROD PUMPING UNIT Russian patent published in 2003 - IPC

FIELD: oil producing industry. SUBSTANCE: proposed deep-well sucker-rod pumping unit contains power drive, reversible drive member, liquid lift balance lines including wire rope hangers, polished rods, sucker-rod strings and plungers of piston pumps arranged in tubings isolated from each other and lowered into well. Liquid lift balance lines contains, each at least one piston pump differing in type-size, and at least one pair of polished rods of balance line is connected to reversible drive member by means of crossmember and wire rope hanger. Reversible drive member is made in form of double-arm balancer with two balance heads, or in form of stepped unit-sheave. At least two tubings are interconnected by clamps arranged at maximum distance equal to length of wave of longitudinal bending of signal tubing under action of plunger pressure force. Reversible drive member is made in form of pumping unit with double-arm balancer. Balancer head of balancer is provided with flexible pulling member from side of connection of connecting rod to balancer. Pulling member is connected with second wire rope hanger by deflecting and guide rollers secured on bedframe of pumping unit. Reversible drive member is made in form of stepped unit- sheave with deflecting rollers providing relative orientation of wire rope hangers and polished rods of oil lifting balance lines. Unit for connecting wire rope hanger with at least two polished rods of each balance line is made in form of crossmember to which polished rods are connected. Wire rope hanger is connected with crossmember by means of rollers or ball joint providing possibility of changing ratio of arms between joint and places of fastening of polished rods. Invention makes it possible to decrease lifting force on drive member from 6 to 9 times. EFFECT: reduced engine power, mass and overall dimensions of surface part of plant. 8 cl, 8 dwg