Anti-pollution thermal washing and paraffin removal unit with dosage channel

Abstract

The invention discloses an anti-pollution thermal washing and paraffin removal unit with a dosage channel. The anti-pollution thermal washing and paraffin removal unit mainly comprises a central tube, an eccentric member, a pressure spring, an upper plug, a lower plug, a guide tube, a push rod, and a conical plug. The eccentric member is disposed on one side of the central tube and is provided with an inner cavity which is communicated with upper and lower ends of the eccentric member. The wall of the central tube is provided with a duct. The upper plug and the lower plug are arranged at upper and lower openings of the cavity. The lower plug is provided with a conical hole. The upper end of the guide tube is fixedly connected with the upper plug. The upper end of the push rod is inserted into the guide tube. The conical plug is disposed at the lower end of the push rod. The conical hole is plugged by the conical plug under the action of elastic pressure. The side wall of the central tube is provided with the dosage channel communicated with the central tube. A one-way valve is arranged on the dosage channel which is disposed between the central tube and the eccentric member. After thermal washing, paraffin control agent is injected into an oil tube from the one-way valve and a filler through a dosage pipeline, paraffin precipitation cycle of an oil well is prolonged, times of well washing are reduced, and the cost is lower.

Description

technical field [0001] The invention relates to a downhole tool for heat washing and wax removal in oil exploitation, in particular to an anti-pollution heat wash and wax removal device. Background technique [0002] In the process of oil exploitation, the wax deposition in the oil well seriously affects the normal production of the oil well, and even shuts down the oil well. It is necessary to regularly remove the wax deposited on the pipe wall to ensure the normal production of the oil well. Hot washing wax removal is the most widely used wax removal technology, which can completely remove the paraffin deposited on the pipe wall. Most of the offshore oilfields are electric pump wells, which can only be used for wax removal by circulating hot washing fluid in the oil casing annulus. The pump discharges the hot washing fluid together with the well fluid from the oil pipe, which can completely remove the paraffin deposited on the pipe wall, but the heat washing efficiency is...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide an anti-pollution thermal wax removal device with a drug injection channel that can realize short-circuit cycle thermal cleaning, so as to realize the ability to uniformly inject chemical agents for wax prevention need

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