Sand preventing device

Abstract

The invention relates to a sand preventing device and particularly relates to a sand preventing device for oil wells. The sand preventing device comprises a hollow cylindrical body, a connector is arranged on the upper portion of the body, and a bag pipe column is fixedly arranged on the lower portion of the body. The sand preventing device is characterized in that a plurality of filtering holes are arranged on the body. According to the sand preventing device, the body and the bag pipe column are arranged on the lower portion of an oil well pump, the length of the oil well pump is not relatively prolonged, time for dirt and sands to burry oil layers is delayed, the phenomenon that pump valves and pistons are snapped by sands is avoided, the dirt in shafts can be stored, abrasion of the sands on a pump valve seat and a pump bushing is lessened, pump efficiency is improved, the pump inspection period is prolonged, times of workover treatment are reduced, crude output is increased, and well workover expenses are reduced.

Description

technical field [0001] The invention relates to a sand control device for oil wells. Background technique [0002] During the production process of the oil well, while the liquid is discharged, the oil layer is also continuously damaged, resulting in sand production and cuttings. Debris is more serious. Although the production of sand and cuttings in oil layers is related to the original generation of oil layers, the more direct reason is the influence of fluid extraction intensity and production pressure difference. In order to increase the recovery rate and obtain high economic benefits, people are constantly increasing the production pressure difference of the oil layer, and at the same time, they are constantly carrying out technical transformation on the oil layer, so sand control has become one of the key technical issues. At present, technical measures such as lower sand control pipe, PS sand control, resin sand control, outer filling of wire-wrapped pipe, high-pre...

AI Technical Summary

Problems solved by technology

At present, technical measures such as lower sand control pipe, PS sand control, resin sand control, outer filling of wire-wrapped pipe, high-pressure filling composite sand control and other technical measures adopted by various oil fields for sand production in oil wells can only properly control the number of sand production in oil layers and reduce formation torsion. Sand discharge from oil wells, but there is always a small amount of sand production in oil wells. This makes it impossible for all sand control measures to be done once and for all.

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