Acid distributing pipe with eyelet structure

Abstract

The invention discloses an acid-distribution tube with pore structure, comprising a parent tube, a microslit sleeve and the pore structure. The parent tube is provided with the pore structure that comprises a base and a filter screen. The base is arranged on the parent tube and has the pore reserved inside. Both sides of the base are respectively provided with the double-layer filter screen. The base is made of stainless steel. The filter screen is a woven wire net made of the stainless steel. The inside of the filter screen is the diffusion screen with 20 eyes and the outside of the filter screen is the filter screen of 150 micrometer. The technical proposal provided by the invention has the beneficial effects that the acid-distribution tube with pore structure that can prevent blockage and rust solves the problem of homogeneous distribution when acid injection is carried out in an oil well, the working efficiency of acid injection of the oil field is improved, working cost is lowered and the oil production of the oil field is enlarged.

Description

technical field [0001] The invention relates to an oil production device, in particular to an acid distribution pipe with a small hole structure. Background technique [0002] When acidizing and unblocking horizontal wells, the acid liquid flows from the root end to the fingertips in the horizontal direction. Due to the top resistance of the fluid in the wellbore and the horizontal section is very long, usually 200-300 meters, the longest can reach 600 meters. In this way, most of the acid solution is consumed at the root end, and other parts have little or no acid solution and cannot be acidified. The existing acid injection operation method will lead to the following adverse effects: (1) The heterogeneity of the permeability of the horizontal section is intensified, the waterline is locally advanced rapidly, and the water content of the horizontal well rises rapidly. (2) The existing liquid in the wellbore has a certain top resistance to the acid liquid, and the acid liqu...

AI Technical Summary

Problems solved by technology

The existing acid injection operation method will lead to the following adverse effects: (1) The heterogeneity of the permeability of the horizontal section is intensified, the waterline is partially advanced rapidly, and the water content of the horizontal well rises rapidly

(2) The existing liquid in the wellbore has a certain top resistance to the acid liquid, and the acid liquid is not easy to inject for comprehensive acidizing operations, and the acid liquid will reduce its acidity if it is regurgitated along the way

(3) The effect of acidification to increase production is reduced

(4) The effective period of acidizing production stimulation is shortened, especially when the wells with screen tube completion are used for plugging removal, the effective period is particularly short

Images