Flexible connector for dual-layer continuous oil pipes

A technology of connectors and oil pipes, which is applied in the direction of drill pipes, casings, and drilling equipment. It can solve the problems of different elongation of two-layer coiled tubing and affect normal operations, and achieve a compact structure, reliable operation, and simple operation. Effect

Active Publication Date: 2015-02-04
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual operation, due to the different properties, pipe diameters and stress conditions of the inner and outer layers of coiled tubing, the elongation of the two layers of coiled tubing will be different, which will affect the normal operation

Method used

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  • Flexible connector for dual-layer continuous oil pipes
  • Flexible connector for dual-layer continuous oil pipes
  • Flexible connector for dual-layer continuous oil pipes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0023] see Figure 1-Figure 7 , shown in the double-layer coiled tubing telescopic connector slip compression sleeve 2, open slip 3, compression top sleeve and inner tube centering core sleeve 7, outer cylinder adjustment joint 9, outer cylinder adjustment sleeve 11 and telescopic cylinder Inner tube adjustment sleeve 15,

[0024] The slip compression sleeve 2, the open slip 3 and the copper ring 4 are sequentially set on the outer tube 1 of the double-layer coiled tubing, and a tapered space for accommodating the open slip 3 is formed in the slip compression sleeve 2 , the open slip 3 and the copper ring 4 are located in the slip compression sleeve 2 . The inner side of the slip compression sleeve 2 forms an inclined surface, the open slip 3 is a cylindrical structure, the inner wall of the slip is formed with serrated slip teeth, and the sli...

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Abstract

The invention discloses a flexible connector for dual-layer continuous oil pipes, which is mainly used for a connection between a tube body and a tool when a connecting tool for the dual-layer continuous oil pipes for an oil and gas field works, and compensative regulation of expansion amounts of inner and outer layers of the continuous oil pipes. A connector for the outer layer of continuous oil pipe is connected to the outer wall of the outer layer of the continuous oil pipe in a tight occlusion manner through slips, the inner layer of the continuous oil pipe slides on an inner pipe regulating sleeve of a telescopic cylinder to complete flexible compensation, an outer cylinder regulating sleeve and the inner pipe regulating sleeve of the telescopic cylinder are connected to an outer pipe slip connector, so that an inner pipe body and an outer pipe body are fixedly connected in a sealed manner; screw threads at the bottom ends of the outer cylinder regulating sleeve and the inner pipe regulating sleeve are respectively connected to related tools, so that the operational requirements of the dual-layer continuous oil pipes with the tools are met, and construction operations, such as negative pressure sand removal, drilling, grinding and testing, can be carried out. The flexible connector has the advantages of compact structure, reliable work and simplicity in operation.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to a double-layer coiled tubing telescopic connector. Background technique [0002] The coiled tubing connector connects the connected coiled tubing to one end of the corresponding tool or working string through a screw thread, and this connection can bear the corresponding tension, pressure and torque, so as to realize the retraction of the coiled tubing, and the tool or string The function of going down to the target well section to complete the corresponding target operation. [0003] When the double-layer coiled tubing is used for various operations with tools, it is necessary to connect the inner and outer coiled tubing with the bottom hole tool string at the same time. In actual operation, due to the different properties, pipe diameters and stress conditions of the inner and outer layers of coiled tubing, the elongation of the two layers of coiled tubing will...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/02
CPCE21B17/07
Inventor 徐昊洋张毅徐克彬张桂敏杨丽娟提云陈国梁杨小涛薛少春
Owner BC P INC CHINA NAT PETROLEUM CORP
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