An oil field downhole wax prevention tool

Abstract

The invention discloses a downhole wax prevention tool for crude oil exploitation, which is composed of an outer casing and an internal active body, wherein: the outer casing has a diameter of about 60mm and a length of 600mm, and its lower end is closed, and the outer casing wall is axially from the lower end surface There are evenly distributed transparent grooves with a length of 300mm and a width of 5mm; the internal active body is a three-section cylinder with a length of 190mm, and empty grooves are evenly distributed radially around it, and the total cross-sectional area of ​​the empty grooves is controlled on the outer casing wall For 90% of the total area of ​​the tank, every two sections of the cylindrical active body are separated by a copper ring of Φ50×10×5mm. Effectively prevent and delay the condensation of wax on the pipe wall and sucker rod, thereby prolonging the well flushing cycle of the oil well. The application of this anti-wax tool can improve the production efficiency of crude oil and avoid the damage caused by conventional thermal / chemical flushing. Pollution, including underground crude oil extraction and surface crude oil transportation.

Description

technical field [0001] The invention relates to a tool for crude oil exploitation, and provides a wax-proof tool with a wax-proof function. Background technique [0002] The crude oil in many oilfields contains wax. When the crude oil is pumped from the ground to the surface, due to the continuous decrease in temperature, the wax dissolved in the crude oil will precipitate into a solid state after the temperature drops to the wax precipitation point (generally around 40°C). The wax condenses on the sucker rod and the wall of the oil well pipe, leading to blockage of the oil pumping pipeline. It is necessary to "wash the well" to remove the condensed wax before continuing the oil pumping operation. The wax removal period of most oil wells is one month or more. The most commonly used methods for well cleaning are thermal washing or chemical wax removal. The above methods are effective, but the oil production operation must be stopped and drained for several days (usually 5 day...

AI Technical Summary

Problems solved by technology

The wax removal period of most oil wells is one month or more. The most commonly used methods for well cleaning are thermal washing or chemical wax removal. The above methods are effective, but the oil production operation must be stopped and drained for several days (usually 5 days) After a period of time, the normal oil production operation can be resumed, which seriously reduces the efficiency of crude oil production, and at the same time, a large amount of chemical substances are discharged, polluting the environment

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