Perforation and reservoir protection integrated device

Abstract

The invention discloses a perforation and reservoir protection integrated device. The perforation and reservoir protection integrated device comprises a rupture disk body, an upper joint, a valve, a T-shaped packing body, a valve seat, a valve plug and a lower joint, wherein the left end of the upper joint is connected with the rupture disk body; the diameter of a cylinder in the middle of the valve is larger than that of a cylinder at the left end, and the right end of the valve is provided with a smooth conical surface; the T-shaped packing body is connected with the right end of the valve;the left end face of the valve seat is a smooth surface and cooperates with the conical surface of the right end of the valve to form a metal seal; the valve plug is connected with the right end of the valve seat, so that the right end of the valve seat forms a seal structure; and the left end of the lower joint is connected with the right end of the valve seat, and the right end of the lower joint is connected with a perforation gun. During normal production operation, measures such as well killing, well washing, descaling, paraffin removal and pump inspection can be normally carried out without causing the phenomenon that wellboard liquid enters strata, causing pollution and affecting the oil well output.

Description

technical field [0001] The present application relates to the field of oil drilling, in particular to an integrated device for perforation storage and maintenance. Background technique [0002] Petroleum resources are a kind of non-renewable resources, so in the process of exploitation of petroleum resources, we should also do a good job of protecting the oil layers of petroleum reservoirs, so as to achieve the purpose of sustainable development of petroleum resources. In my country's petroleum resources, low-permeability sandstone reservoirs account for a large proportion and have very rich oil reserves. However, because they are mainly distributed in subsidence areas and steep slope areas, the structural layers of oil reserves are very complicated. Therefore, It highlights the characteristics of poor reservoir physical properties and small pore throats. [0003] Low-permeability sandstones are mostly located in middle-deep layers, and the reservoir rocks have poor physical...

AI Technical Summary

Problems solved by technology

[0008] The disadvantage of the existing technology is that it cannot meet the operation time after perforation and other operations when the oil well is put into production at the same time.

It is easy to cause formation pollution during operations such as well killing, well cleaning, and pump inspection. At present, similar tools cannot meet the requirements of avoiding oil layer pollution after perforation and during production.

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