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Downhole coiled tubing

A technology of tubing and inner core tube, which is applied in the field of downhole coiled tubing, can solve the problems of poor tensile and compressive performance and short service life, and achieve the effect of improving compressive and tensile performance

Inactive Publication Date: 2016-10-12
河北恒安泰油管有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Coiled tubing currently on the market has poor tensile and compressive properties and short service life

Method used

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Embodiment Construction

[0022] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Please refer to figure 1 and figure 2 , figure 1 A cross-sectional schematic diagram of the downhole coiled tubing provided by the embodiment of the invention; figure 2 It is a schematic diagram of the longitudinal section of the downhole coiled tubing provided by the embodiment of the invention.

[0024] The downhole coiled tubing provided by the embodiment of the present invention includes an inner core pipe 1, a compression layer 2, a fixed layer 3, a compression layer 6 and an outer sheath layer 8 that are fixedly connected sequentially from the inside to the outside, wherein , the compression layer 2 is an interlocking steel tape armored skeleton, the fixed layer 3 is a thermoplastic resin fixed layer, the compressi...

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Abstract

The invention discloses downhole coiled tubing. The downhole coiled tubing comprises an inner core tube, a compression-resistance layer, a fixing layer, a compression-resistance and tensile-resistance layer and an outer sheath layer which are sequentially arranged in a sleeved mode and fixedly connected from inside to outside, wherein the compression-resistance layer is an interlocked steel-tape armoring framework, the fixing layer is a thermoplastic resin fixing layer, the compression-resistance and tensile-resistance layer is formed by winding a fiber body, and downhole power transmission cables and a downhole monitoring optical fiber are arranged in the compression-resistance and tensile-resistance layer. The downhole coiled tubing can improve the compression-resistance and tensile-resistance performance.

Description

technical field [0001] The invention relates to the technical field of downhole oil pipes, in particular to a downhole coiled oil pipe. Background technique [0002] Coiled tubing is a kind of pipe with good flexibility, also known as flexible tubing. A roll of coiled tubing is several kilometers long. It can replace conventional tubing for many operations. The coiled tubing operation equipment has the characteristics of pressure operation and continuous lifting. The equipment is small in size, fast in operation cycle and low in cost. [0003] Coiled tubing currently on the market has poor tensile and compressive properties and short service life. [0004] Therefore, how to provide a downhole coiled tubing to improve the compressive and tensile properties is a technical problem that those skilled in the art need to solve. Contents of the invention [0005] The purpose of the present invention is to provide a downhole coiled tubing to improve the compressive and tensile p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/20
CPCE21B17/20
Inventor 孟庆义王守虎申晓莉崔晓轩
Owner 河北恒安泰油管有限公司
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