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Double screen

A double-layer screen and screen tube technology, which is applied in the direction of drill pipe, casing, wellbore/well components, etc., can solve the problem that the double-layer screen tubes cannot communicate with each other

Active Publication Date: 2021-09-28
ZHANJIANG BRANCH OF CHINA NATIONAL OFFSHORE OIL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a double-layer screen to alleviate the technical problem that the double-layer screen cannot communicate with each other in the prior art

Method used

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Embodiment Construction

[0039] The technical solutions of the present invention will be described below in conjunction with the drawings, as will be described, as described herein is an embodiment of the invention, not all of the embodiments. Based on the embodiments of the present invention, there are all other embodiments obtained without making creative labor without making creative labor premises.

[0040] In the description of the invention, it is to be understood that the orientation or positional relationship of the instructions indicated by the term "center", "upper", "lower", "inside", etc. are based on the orientation or positional relationship shown in the drawings. It is merely to facilitate the description of the present invention and simplified description, rather than indicating or implying that the device or element must have a particular orientation, and is not understood to limit the limitation of the invention.

[0041] Moreover, the term "first", "second" is used only for the purpose ...

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Abstract

The invention provides a double-layer screen, which relates to the technical field of well completion, including a base pipe, a first connecting piece, a second connecting piece and an outer casing; the first connecting piece and the second connecting piece are fixedly sleeved on the base pipe, and The first connecting piece and the second connecting piece are arranged at intervals along the axial direction of the base pipe. One end of the outer casing is connected to the first connecting piece, and the other end is connected to the second connecting piece, and the first annular space is formed between the outer casing and the base pipe; after the two double-layer screen pipes are connected, the first double-layer screen The first connecting piece on the pipe is connected with the second connecting piece on the second double-layer screen to form the first cylinder, and the base pipe on the first double-layer screen is connected to the second connecting piece on the second double-layer screen The base pipe is sealed and connected to form a second cylinder body, and a second annular space is formed between the first cylinder body and the second cylinder body; the first connecting piece and the second connecting piece are provided with holes for communicating the first annular space with the second A through hole in the second annulus. The technical effect of good connection connectivity of double-layer screen tubes is achieved.

Description

Technical field [0001] The present invention relates to the field of completion techniques, and in particular, there is a bilateral screening. Background technique [0002] In the gravel of the bare eye wells such as deep water and long-horizontal wells, it is easy to have local wellbore irregularities, formation collapse or early sandpass, forming barriers due to environmental conditions, forming a barrier, resulting in a barrier The well filling is not complete, more prone to damage, shortening the life life. [0003] The connection method of the sand-absorbing screen in the prior art is through the coupling, connecting the base tube or short section portion of the upper and lower sieves, or a tube buckle or a short section of the upper and lower screen tubes, and then passed Capaci connection. However, while implementing the internal and external bilateral screens, it is also necessary to ensure connectivity and sealing of the cyan-air channel between the double screen tubes. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/08E21B17/02
CPCE21B17/02E21B43/08
Inventor 李中郭永宾孟文波王尔钧刘和兴刁欢王应好张崇董钊任冠龙张健蒋东雷唐咸弟
Owner ZHANJIANG BRANCH OF CHINA NATIONAL OFFSHORE OIL CORP