Sand-washing blockage-removing steam injection tool

Abstract

The invention discloses a sand-washing blockage-removing steam injection tool. The sand-washing blockage-removing steam injection tool is sequentially provided with a matched oil well pump, a steam injection outer pipe, a bridge type sand-washing check valve, a sand-washing core pipe, a rotational flow sand-washing pipe, a thermal expansion telescopic pipe and an anti-falling inclined tip from topto bottom. The sand-washing blockage-removing steam injection tool has the advantages that the hidden danger of sand blockage is eliminated, the operation is simple, the replacement or maintenance isconvenient, the service life of an oil pipe is prolonged, and the well repair cost is reduced.

Description

technical field [0001] The invention relates to an oil exploitation equipment, in particular to a steam injection tool for sand flushing and blocking removal, which belongs to the field of oil exploitation equipment. Background technique [0002] The heavy oil reserves in the oil field are abundant, and the pumps used for heavy oil are mainly feedback pumps and injection-production pumps, which have not been updated in the past 20 years, and they also have certain defects: 1. The probability of steam injection fouling is 5-10%, resulting in failure to switch pumps in time, Reduce steam injection effect. The downstroke is lost, and the pump efficiency is 5-10% lower than that of the tube pump. When checking the pump, it is necessary to lift the oil pipe, and the operation period is long and the cost is high. Before steam injection, if the downhole sand particles are not cleaned, the permeability of the oil layer will be reduced, and even the steam injection channel will be ...

AI Technical Summary

Problems solved by technology

[0002] The heavy oil reserves in the oil field are abundant, and the pumps used for heavy oil are mainly feedback pumps and injection-production pumps, which have not been updated in the past 20 years, and they also have certain defects: 1. The probability of steam injection fouling is 5-10%, resulting in failure to switch pumps in time, Reduce steam injection effect

Oil pumps are prone to sand jams during production in sand-bearing wells, resulting in short service life of the oil well pumps. In workover to replace the oil well pumps, the pipe string needs to be lifted up to the wellhead, and then the pipe string should be lifted out. On the sand exploration surface, high-pressure water is input from the oil pipe, and the sandy liquid is discharged from the annular space between the oil pipe and the casing

Long workover time for sand flushing, frequent disassembly of the tubing thread, wear of the tubing thread, shortened tubing life, long workover time and high costs

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