Automatic quantitative dosing device under oil well

Abstract

The invention relates to an automatic quantitative dosing device under an oil well. In the device, the upper part of a charging pipe is connected with a communicating joint, and the lower part of the charging pipe is connected with a pump body joint of a dosing pump; a piston rod of the dosing pump is connected with a cam, a connecting rod and a motor in sequence; the motor is connected with a control circuit and a battery; a singlechip IC2 of the control circuit is connected with a dial switch S1; a triode Q2 is connected with a triode Q1; the Q1 is connected with the motor; and a power supply is connected with the triode Q1 through a voltage regulating chip IC1. The motor starting time interval and every dosing amount can be set according to the total dosing amount of the oil well, the piston rod of the dosing pump reciprocates to spray a liquid medicine into the annular space of an oil sleeve during dosing, and the dosing pump stops working and waits for the next dosing time when a designed medicine amount is reached so that automatic timing and quantitative continuous dosing are realized. The automatic quantitative dosing device has a high automatic degree, a good dosing effect, low construction cost and high long-term working reliability, and is easy to operate; and underground dosing can be realized without detaching an instrument or performing pipe column operation.

Description

technical field [0001] The invention relates to an automatic quantitative dosing device for downhole oil wells. Background technique [0002] Domestically, the downhole dosing of oil wells started relatively late, and currently only a few units have carried out related research. In terms of downhole dosing of oil wells, there is "Downhole Dosing Device" (Chinese Patent No. 200520086399.6), and its central tube is installed sequentially. A leather cup, a support ring, an inner and outer double body and a lower stop ring are arranged, and a seal is installed on the central tube and the lower stop ring. "A Continuous Dosing Device for Downhole Liquid in Oil Well" (Chinese Patent No. 200820033639.X), consists of a medicine tube, a dosing device and a separation tube with through holes on the pipe wall. The dosing device includes a screw in the middle. A shell with a hole and two ends with threaded fasteners, a filter, a double-headed short connection pipe, a slender tube and a ...

AI Technical Summary

Problems solved by technology

It can continuously and stably add the chemical agent in the agent pipe to the production liquid at a given speed, but it has the following defects: the device is a drip type, and the agent is released to the downhole by gravity, and the device is always in the process of going into the well. Chemical leakage is not conducive to the effective dosing of oil wells

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