Inclined shaft sand prevention oil well pump

Abstract

The invention discloses an inclined shaft sand prevention oil well pump. The inclined shaft sand prevention oil well pump comprises a plunger assembly and a pump cylinder assembly, a pump cylinder comprises a gap bridge pipe, a middle coupling and a two-way connector, a pump cylinder lengthening cylinder is arranged in the pump cylinder assembly, a sand setting annulus is formed between the pump cylinder lengthening cylinder and the gap bridge pipe, a short pump cylinder is arranged at the upper end of the pump cylinder lengthening cylinder, the short pump cylinder and a long plunger are in sliding seal, an oil inlet valve cover is arranged in the middle coupling, the oil inlet valve cover and the two-way connector form a sand falling annulus, a check block is arranged above the oil inletvalve cover, the outer circumferential ring of the check block is a conical surface structure, when sand grains in the pump cavity are deposited downwards, the sand can slide into a sand falling annulus space on the outer side of the oil inlet valve cover along the outer conical surface of the stop block, when sand grains in an oil pipe on the upper portion of the oil well pump fall onto the upperoil outlet valve cover, the sand grains can slide into the annular sand setting annulus space on the two sides along the upper conical surface of the upper oil outlet valve cover and cannot directlyfall into the upper oil outlet valve cover or the matching surface between the pump cylinder and the long plunger, so that the phenomenon that the sand grains enter the pump to cause sand blocking ordeposit on the valve cover to cause sand burying is reduced.

Description

technical field [0001] The invention relates to the field of oil well pumps, in particular to a sand control oil well pump for inclined wells. Background technique [0002] At present, many pumping wells in domestic oilfields are highly deviated wells and horizontal wells with large sand content. When the inclined well pump is used for mining, sand particles often enter the pump and cause sand stuck and sand buried. Even in the lower part of the pump After hanging sand control tools such as sand control screens, more sand particles still enter the pump, resulting in reduced pump efficiency and shortened pump inspection cycle; while sand control oil well pumps can solve problems such as sand jams and sand burials, but cannot adapt In inclined wells, the seat of the ball valve is not correct, the closing lag, and side leakage often occur, which leads to low pump efficiency and even no oil output. Therefore, it is necessary to adopt an inclined well sand control pump with a mo...

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Problems solved by technology

[0005] The main purpose of the present invention is to provide an inclined well sand control oil well pump to solve the problem that when the inclined well pumping cannot prevent sand burial and the well deviation angle exceeds 60°, the valve ball will be affected by gravity and the valve ball will still fail to sit on the center On the seat, causing problems with ball valve closing lag, side leakage, etc.

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