Double-layer screen pipe and connection method thereof
A technology of pipe connection and double-layer screen, which is applied in the direction of drilling pipe, casing, earthwork drilling, etc., and can solve the problem that the double-layer screen pipes cannot be connected to each other
Active Publication Date: 2019-09-20
ZHANJIANG BRANCH OF CHINA NATIONAL OFFSHORE OIL CORP
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Problems solved by technology
[0005] The purpose of the present invention is to provide a double-layer screen and its connection method to alleviate the technical problem that the double-layer screen cannot be connected to each other in the prior art
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[0044] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0045] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings , is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific...
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The invention provides a double-layer screen pipe and a connection method thereof, and relates to the technical field of well completion. The double-layer screen pipe includes 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 mounted on the base pipe in a sleeving mode, and the first connecting piece and the second connecting piece are arranged in the axial direction of the base pipe at intervals. One end of the outer casing is connected with the first connecting piece, the other end of the outer casing is connected with the second connecting piece, and a first annulus space is formed between the outer casing and the base pipe; after the connection of two double-layer screen pipes, a first connecting piece on the first double-layer screen pipe is connected with a second connecting piece on the second double-layer screen layer to form a first barrel body, and a base pipe on the first double-layer screen pipe is connected with a base pipe on the second double-layer screen pipe in a sealing mode to form a second barrel body, and a second annulus space is formed between the first barrel body and the second barrel body; and the first connecting piece and the second connecting piece are correspondingly provided with through holes used for being in communication with the first annulus space and the second annulus space. The technical effect of good communication of the double-layer screen pipe is achieved.
Description
technical field [0001] The invention relates to the technical field of well completion, in particular to a double-layer screen pipe and a connection method thereof. Background technique [0002] In the gravel packing sand control of deep water oil and gas wells or long horizontal wells and other open holes, due to the influence of environmental conditions, local wellbore irregularities, formation subsidence or early sand bridges are prone to occur during the high-speed filling process, forming barriers and causing some Incompletely packed well sections are more prone to damage and shorten completion life. [0003] In the prior art, the connection method of the sand control screens is to connect the base pipes or nipples of the upper and lower screens through couplings, or the base pipes of the upper and lower screens are provided with tubing buckles or nipples, and then through Coupling connection. However, while realizing the separate connection of the inner and outer dou...
Claims
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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