Efficient downhole dosing device

Abstract

The invention discloses an efficient downhole dosing device. The efficient downhole dosing device comprises an agent storage cylinder, a control cylinder and a photovoltaic panel. A batching plug is arranged in the top end of the agent storage cylinder through a sealing ring, and a bottom plate of the bottom end of the agent storage cylinder is in contact with a top plate of the top end of the control cylinder. The bottom plate and the top plate are connected with a liquid discharging pipe located in the control cylinder, and a fixed frame at the lower end of the top plate is internally provided with a battery pack, a control board and a motor. The lower liquid pipe is provided with a pulse valve connected with the control board, and a rotating shaft of the motor is connected with a grinding wheel type regulating valve with an adjusting brush. A plurality of liquid holes are formed in a liquid leakage plate at the bottom end of the control cylinder, and a charger is arranged between the fixed frame and the inner wall of the control cylinder. The charger is connected with the photovoltaic panel through a wire and a current stabilizer, and a transducer and an ultrasonic generator arearranged on the liquid leakage plate. The efficient downhole dosing device is simple in structure, good in treatment effect, high in work efficiency, convenient to operate and long in service time, and can automatically add a certain amount of chemical agent at a fixed time, the amount of the added chemical agent is constant, and adding time intervals are the same.

Description

technical field [0001] The invention relates to the technical field of oil recovery in oil fields, in particular to an efficient downhole dosing device. Background technique [0002] In oil field development, with the large-scale development of ultra-low permeability reservoirs, the use of small casings for well completion and production has become a major technology. However, with the prolongation of production time, the compatibility of formation water and the physical properties of crude oil , there are many shortcomings, such as the conventional manual dosing methods on the ground are all concentrated dosing, the traditional mechanical downhole drip dosing device can not control the dosing flow rate, it is difficult to achieve regular and quantitative dosing, often three months of dosing The addition is completed in less than a week; due to the small amount of artificial dosing at the wellhead, most of them are attached to the tubing and casing walls due to the influence...

AI Technical Summary

Problems solved by technology

[0002] In oil field development, with the large-scale development of ultra-low permeability reservoirs, the use of small casings for well completion and production has become a major technology. However, with the prolongation of production time, the compatibility of formation water and the physical properties of crude oil , there are many shortcomings, such as the conventional manual dosing methods on the ground are all concentrated dosing, the traditional mechanical downhole drip dosing device can not control the dosing flow rate, it is difficult to achieve regular and quantitative dosing, often three months of dosing The addition is completed in less than a week; due to the small amount of artificial dosing at the wellhead, most of them are attached to the tubing and casing walls due to the influence of the wellbore trajectory of the directional well, and the performance of the chemical is difficult to be effectively exerted. It is greatly affected by the well temperature, and the concentration is difficult to be effectively controlled; the traditional dosing device has a short practical time, and the battery needs to be replaced regularly to ensure the normal operation of the dosing device, resulting in short use time and troublesome operation of the dosing device

Images