A self-sealing drag-reducing anti-seize oil well pump

Abstract

The invention relates to a self-sealing anti-drag and anti-jamming oil-well pump. The self-sealing anti-drag and anti-jamming oil-well pump consists of a self-lubricating assembly and a particle removing structure assembly, wherein the particle removing structure assembly is connected with the lower end of the self-lubricating assembly. The particle removing structure assembly comprises a fixed valve, a particle removing cylinder, flow guide blades and a particle settling cavity, wherein the fixed valve is installed on a neck-down section at the upper end of the particle removing cylinder, wedge-shaped particle outlets are formed in an inclined pipe section of the particle removing cylinder, the flow guide blades are welded on the inner wall of the body section of the particle removing cylinder, and a plurality of lateral liquid inlets are formed in the positions, at the lower ends of the flow guide blades, on the body section of the particle removing cylinder. The self-lubricating structure assembly comprises a pump cylinder, an upper traveling valve, a lower traveling valve and a plunger, wherein the upper traveling valve is connected with the upper end of the plunger, the lowertraveling valve is connected with the lower end of the plunger, an annular gap between the inner wall of the pump cylinder and the plunger forms a liquid storage cavity through an upper sealing ring and a lower sealing ring, a lubricating liquid inlet hole is drilled on an upper traveling valve cover, and the lubricating liquid inlet hole communicates with the liquid storage cavity through a lubricating liquid guide hole. According to the self-sealing anti-drag and anti-jamming oil-well pump, fine particles can be well prevented, and wear reduction between the plunger and the pump cylinder isensured.

Description

technical field [0001] The invention relates to the technical field of oilfield downhole equipment, in particular to a self-sealing, drag-reducing and anti-seize oil well pump. Background technique [0002] In the industry, the oil well pump is usually installed at the bottom of the downhole oil pipe. Rod pumping is one of the traditional oil production methods in the petroleum industry, and it is also a lifting method that is still widely used in oil production engineering. This pump mainly relies on the pump barrel. The plunger reciprocates inside, and the plunger is driven by the sucker rod extending to the ground transmission equipment, and the liquid is lifted to the ground through the oil pipe during the downstroke. In domestic and foreign oil field production wells, rod extraction technology accounts for more than 80%, and the crude oil output produced by rod mechanical oil recovery system accounts for about 75% of the total crude oil output. However, as the oilfield...

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Problems solved by technology

[0004] The object of the present invention is to provide a self-sealing drag-reducing and anti-seize oil well pump, which is used to solve the problems caused by particles such as sand, scale and wax in the well fluid in the prior art when the oil well pump is working. Pumps causing wear or stuck pumps

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