METHOD TO PRODUCE OIL USING ROD-TYPE DOWNHOLE PUMP AND JACK TO THIS END (VERSIONS) Russian patent published in 2010 - IPC F04B47/02 

FIELD: engines and pumps.

SUBSTANCE: invention relates to oil production and can be used in reciprocation rod-type downhole pump (RDHP) using jacks as drives. In compliance with proposed method, crank rpm and rod reciprocation speed matched therewith are varied by sine law in smoothly accelerating operating stroke, whereat rod up travel reaches maximum speed with con rod in vertical position and crank at lower point. Idling is proportionally decelerated, whereat rod down travel reaches minimum speed with con rod in vertical position and crank at lower point. Con rod speed at operating stroke start and idling end is decreased by magnitude smaller than mean rod reciprocation speed. Proposed jack has cranks arranged on rims running in rolling supports (or roller bearings) fitted along perimetres of openings. The latter are arranged in vertical frames fastened on opposite side of support frame. Reduction gear and motor are arranged on frame-platform mounted on support frame to move along rocker beam direction. Reduction gear output shaft extensions support hubs in the plane of rims revolution, hubs OD being smaller than rim ID. Drive rods are attached to said hubs. Every said hub has through radial or inclined groove to accommodate roller fitted on pin pressed on the end face of appropriate rim with 90°-advance along the direction of rotation, as well as with smaller or greater advance with respect to the point of attachment to crank rim.

EFFECT: higher efficiency of oil production with no deterioration in process dynamics.

8 cl, 39 dwg