Completion device for oil and gas wells

Abstract

A well completion device for oil and gas wells, which is composed of steel brackets, plugs and grids, is connected to the end of the casing or liner in the oil layer through a hanger, and then penetrates into the oil and gas layer. The internal cross-section of the steel bracket runs through the cylindrical mold plug with built-in grid mesh. Using the sublimation characteristics of the mold plug pouring material, when the cement is poured into the ring-shaped area between the oil layer casing or tailpipe and the wellbore of the oil and gas well and After solidification, the mold plug is heated to make the temperature higher than the sublimation temperature of the mold plug casting material, thereby forming a channel with the same effect as the perforation operation, and realizing the effective communication between the oil and gas layer and the wellbore of the oil and gas well. While retaining the advantages of the tunnel, the device avoids problems such as perforating fluid pollution, perforating pressure out of control, and perforating construction safety. Moreover, the built-in grid mesh has the function of sand control and filtering, and has good engineering application and promotion prospects.

Description

technical field [0001] The invention relates to a well completion device for oil and gas wells, that is, a well completion device that extends into the oil and gas layer, hangs on the end of the oil layer casing or tailpipe, and utilizes the principle of sublimation of regional materials to inject cement into the oil and gas well to cement the well. A device for generating channels belongs to the technical field of petroleum storage equipment. Background technique [0002] Completion in a narrow sense refers to the completion method of oil and gas wells, that is, according to the geological characteristics of oil and gas layers and the technical requirements of development and production, the process of establishing a reasonable communication channel or connection mode between oil and gas layers and oil and gas well bores at the bottom of the well is also a process that people usually use. The so-called drilling completion. Well completion is the last important part of dril...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the complexity and safety of perforating operations, the present invention provides a well completion device for oil and gas wells, which does not require perforating operations and does not require the use of perforating fluid, but has the same effect as perforating to avoid injury Oil layer, polluted formation, to prevent production accidents

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