Device capable of improving extending limit of coiled tubing

A limit and tubing technology, applied in the field of oil and gas resource exploration, can solve the problems of limited extension length of coiled tubing drilling, unable to reach the expected depth, increasing friction, etc., and achieve the effect of preventing complex downhole, simple structure and reducing friction.

Inactive Publication Date: 2016-08-17
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a device that can increase the extension limit of coiled tubing, aiming to solve the problem of continuous increase of friction between coiled tubing and well wall in coiled tubing drilling technology, difficulty in drill pressure transmission, and limit extension length of coiled tubing drilling. Problems that are limited and cannot reach the expected depth

Method used

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  • Device capable of improving extending limit of coiled tubing
  • Device capable of improving extending limit of coiled tubing
  • Device capable of improving extending limit of coiled tubing

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0027] In order to reduce the frictional resistance between the coiled tubing and the wellbore, the present invention proposes a tool that can increase the extension limit of the coiled tubing, solves the problems existing in the coiled tubing drilling, and achieves the improvement of the ROP on the basis of ensuring the quality of the wellbore. The purpose of increasing the extension limit of coiled tubing.

[0028] The structure of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0029] like Figure 1-Figure 4 As shown, the device that can increase the extension li...

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Abstract

The invention discloses a device capable of increasing the extension limit of a coiled tubing, which is provided with a vibration nipple and a modulating nipple; Drill assembly connection. The axial vibration energy of the tool of the present invention can convert the static friction between the coiled tubing and the well wall into sliding friction, reduce the friction between the coiled tubing and the well wall, and can improve the extension limit of the coiled tubing; the axial vibration of the tool can promote The movement of cuttings prevents the formation of cuttings beds, smooths the wellbore, and prevents downhole complexity; the impeller with through holes ensures that there is always fluid passing through the tool, which will not affect the use of downhole power drilling tools and measuring tools, while preventing The destructive effect of water hammer is eliminated; the present invention has simple structure, few components, and ensures the reliability of the tool.

Description

technical field [0001] The invention belongs to the technical field of oil and gas resource exploration, in particular to a device capable of increasing the extension limit of a coiled tubing. Background technique [0002] With the deepening of exploration and development of oil and gas resources, many oil fields have entered the middle and late stages of development, and the type of oil and gas resources has gradually changed from conventional to unconventional. The field of oil and gas exploration and development has gradually expanded to include low porosity, low permeability, complex small Oil reservoirs, local remaining oil reservoirs, and unconventional oil reservoirs such as coalbed methane, shale gas, and tight sandstone gas. Coiled tubing has the characteristics of no joint, no variable diameter, large bending, continuous lifting, dynamic sealing, high strength, high pressure bearing and small volume. Less land, less pollution, less workers required. Therefore, co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/20
CPCE21B17/20
Inventor 王国华秦大伟熊继有谭军邓丽
Owner SOUTHWEST PETROLEUM UNIV
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