Adjustable slicing mining valve

Abstract

The invention provides an adjustable slicing mining valve. The valve comprises an outer cover pipe and a check valve which unilaterally connects from the bottom to the top and is arranged in the outer cover pipe, an axial channel is formed between the outer cover pipe and the check valve, the upper end of the check valve is an open end and the lower end of the check valve is a closed end, at least one radial conduit is connected between the outer side wall of the check valve and the inner wall of the outer cover pipe, the outer end of the radial conduit is spliced with the mounting hole formed on the side wall of the outer cover pipe, the inner end of the radial conduit is communicated with the inner cavity of the check valve near to the lower end, and a radial channel is formed and not communicated with the axial channel. The adjustable slicing mining valve effectively solves the interlayer interference problem, the controllable slicing mining can be achieved, and the mobilization degree of the low-mobilization oil reservoir is increased.

Description

technical field [0001] The invention belongs to the field of oil exploitation, and in particular aims at the problems of large physical property differences between oil layers and mutual influence and interference in the production process, and proposes an adjustable separate recovery valve. Background technique [0002] With the continuous deepening of oilfield development, affected by factors such as reservoir heterogeneity, there are differences in physical properties between layers, and the contradiction between high and low permeability layers is prominent, interacting and interfering with each other. The high-permeability layer has low pressure and relatively high water content. The pressure difference of each oil layer is large, and the interlayer interference is serious, which inhibits the production of medium and low-permeability layers and restricts the production capacity of oil wells. [0003] At present, to solve this problem, various oil fields adopt the method...

AI Technical Summary

Problems solved by technology

[0002] With the continuous deepening of oilfield development, affected by factors such as reservoir heterogeneity, there are differences in physical properties between layers, and the contradiction between high and low permeability layers is prominent, interacting and interfering with each other. High-permeability layers have low pressure and relatively high water content, and the pressure differences between oil layers are large, and inter-layer interference is serious, which inhibits the production of medium and low-permeability layers and restricts the production capacity of oil wells

[0003] At present, to solve this problem, various oil fields adopt the method of layered oil recovery, but the layered oil recovery technology mostly controls the production of the upper and lower oil layers through different pump diameters. Although the oil layers are effectively separated by using packers, the contradiction between layers is alleviated, but When the pressure of a certain layer is low and the liquid supply capacity is insufficient, empty pumping will occur, which will cause energy waste of the pumping unit and affect the effect of layered oil recovery

At the same time, in the production process of the traditional layered oil recovery technology, the upper and lower pumps of the separate production pump work out of synchronization and interfere with each other, resulting in the failure of normal pumping in separate production

In addition, the stress on the existing split-production string is unreasonable, and the pump is always under stress, resulting in a short validity period and frequent pump inspections.

There are still some limitations in the existing layered oil recovery technology

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