FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil industry and can be used for operation of wells with deviation angle from vertical from 43 to 110 degrees, equipped with installations of borehole sucker-rod pumps. Downhole sucker-rod pump includes cylinder, self-adjusting suction valve, plunger, self-adjusting pressure valve. Cylinder is equipped with a casing forming an annular cavity with it and installed with a stop in the upper and lower clutches of the cylinder. Casing is made of several parts, between which there are centralizers movably installed on the cylinder. Upper part of casing is connected by means of thread with upper centralizer.
EFFECT: improving operating reliability of the downhole sucker-rod pump due to exclusion of cylinder bending deformation during lowering and raising operations and during operation of the pump in the well and, as a result, exclusion of plunger jamming in the pump cylinder.
4 cl, 1 dwg
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