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Gravel pre-filling sand prevention pipe

A sand control pipe and pre-filling technology, which is applied in the direction of production fluid, wellbore/well parts, earthwork drilling and production, etc., can solve the problems of complex gravel packing construction technology in horizontal wells, unstable production capacity of open hole completion, etc., and avoid sand control pipes Clogging, prevention of casing clogging, effect of preventing clogging

Active Publication Date: 2012-11-21
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the prior art, and design a new type of sand control pipe for pre-packed gravel, which overcomes the shortcoming of unstable production capacity of open hole completion and avoids the complicated construction process of gravel packing in horizontal wells. question

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  • Gravel pre-filling sand prevention pipe
  • Gravel pre-filling sand prevention pipe
  • Gravel pre-filling sand prevention pipe

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Embodiment Construction

[0019] The specific implementation manners of the present invention will be further described below in conjunction with the drawings and examples. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0020] as attached Figures 1 to 3 Shown, the concrete implementation technical scheme of the present invention is:

[0021] A sand control pipe pre-filled with gravel comprises a base pipe 6, a sand control pipe shell 1 set outside the base pipe 6, and a gravel layer 2 is filled between the base pipe 6 and the sand control pipe shell 1, Several diversion holes 3 are provided on the pipe wall of the base pipe 6 and the pipe wall of the sand control pipe shell 6 .

[0022] In the present invention, the sand control pipe casing 1 is arranged between the sealing base 4 and the sealing cover 5 .

[0023] In the present invention, the sealing base 4 is fixedl...

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Abstract

The invention relates to a petroleum extraction device, and particularly relates to a gravel-prepacked sand control pipe specially used for petroleum extraction, which comprises a base pipe and a sand control pipe shell sheathed outside the base pipe; a gravel layer is filled between the base pipe and the sand control pipe shell, and a plurality of deflector holes are arranged on the pipe wall ofthe base pipe and the pipe wall of the sand control pipe shell. Due to the existence of the gravel layer in the pebble prepacked sand control pipe, the extraction device has good sand controlling effect. A vertical shell can change the flow form and direction of the fluid, thus preventing the blockage of the shell. The base pipe with high flow conductivity can ensure that all the fine sand passing through the gravel layer can output through the base pipe without generating the blockage of the base pipe.

Description

technical field [0001] The invention relates to an oil extraction device, in particular to a special sand control pipe for oil extraction. Background technique [0002] The problem of sand production in unconsolidated sandstone reservoirs has become a key issue affecting the productivity of oil wells. At this stage, more and more new sand control pipes have been put into the market and have been applied in the field. Due to the ever-changing characteristics of reservoirs, different types and structures of sand control pipes have different application ranges, but no matter what kind of sand control pipe, the ultimate goal is to maximize the production capacity of oil wells while controlling sand production. Therefore, the design of the sand control pipe takes these two aspects as the goal to optimize the structure and parameters. At present, the commonly used well completion methods in oil mining sites are mostly open hole screen completion or gravel packing completion. From...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/08
Inventor 邓金根姜伟董星亮何宝生曾祥林王利华
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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