Downhole sucker rod pumps FOR OIL AND GAS

摘要

The invention relates to the petroleum industry and may be used for the operation of producing wells, including high gas factor, with the bypass and / or highly viscous products. The downhole rod pump for oil and gas, comprising mounted on the lower end of the pipe string cylinder with a suction valve and disposed in the cylinder with reciprocating movement and connected to rods with wellhead driven hollow plunger with a pressure valve, equipped with a channel communicating with the cavity of the pipe string to release from the cylinder to the hollow plunger approach to its upper operative position. The discharge valve is placed on top of the plunger which is made a length greater length of the maximum working stroke of wellhead actuator. The cylinder is fitted with the bottom sealed chamber of larger diameter with a suction valve, wherein the valves are made with a throughput of not less than the throughput capacity of the plunger. The channel is in the form of at least one lateral opening plunger disposed below the discharge valve. This design downhole sucker rod pump for oil and gas extraction can work effectively in the marginal wells with maximum efficiency, including the production of complex products, by-pass oil and / and products with a high content of gas because of the minimal resistance to the flow of liquid and gas. 1 NP 1 yl.