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Whipstock in direct connection with casing

An inclined guide and casing technology, which is applied to drilling equipment, drilling equipment and methods, and earth-moving drilling and mining, etc., can solve the problems of easy falling off of connecting parts and poor durability, so as to save the time of oblique up-and-down drilling, The effect of improving the build-up efficiency

Pending Publication Date: 2017-08-29
贵州地质工程勘察设计研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing deflection guide usually needs a special connecting piece to connect with the deflecting bit when used, and the connecting piece is easy to fall off, and the durability is not good

Method used

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  • Whipstock in direct connection with casing
  • Whipstock in direct connection with casing

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Embodiment Construction

[0016] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments, which are only used to explain the present invention and do not limit the protection scope of the present invention.

[0017] like figure 1 As shown, a deflector directly connected to the casing includes a cylindrical tubular body 1, a casing connecting portion 11 disposed at one end of the cylindrical tubular body 1 and a closed end portion 12 disposed at the other end, wherein The casing connection part 11 is connected to the casing collar 2, and the cylindrical tubular body 1 is located in the middle of the casing connection part 11 and the closed end part 12, and a window 3 is provided; the window 3 provides a channel for the deflection bit, and the opening From the end close to the casing collar 2, the window 3 includes a vertical downcut section 31, a flat section 32, and an oblique upwa...

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Abstract

The invention discloses a whipstock in direct connection with a casing. The whipstock comprises a cylindrical pipe, a casing connection portion and a closed end portion, wherein two ends of the cylindrical pipe are provided with the casing connection portion and the closed end portion respectively. The casing connection portion is connected with a casing coupling, and the portion, between the casing connection portion and the closed end portion, of the cylindrical pipe is provided with an open window which provides a passage for a whipstocking drill. One end, close to the casing coupling, of the open window extends downwards vertically by a certain depth, then horizontally extends by a distance towards the closed end portion along a direction parallel to the axis and extends upwards obliquely, a horizontal cut distance guarantees that the cylindrical pipe can be moved out from the open window by the drill, and an inclination angle is a preset whipstocking angle. A whipstocking plate is fixedly connected in the open window and extends downwards along the inclination portion of the open window to the bottom of the cylindrical pipe. The whipstock in direct connection with the casing is capable of bypassing an accident section and high in whipstocking efficiency.

Description

technical field [0001] The invention relates to the technical field of skew guides, in particular to a skew guide directly connected to a bushing. Background technique [0002] After drilling for a long time, due to serious downhole casing damage that cannot be repaired, or complex accidents downhole that cannot be dealt with, it is necessary to sidetrack the wellbore at a suitable depth above the damaged well section. Run in and secure the ramp deflector. Positioning guide technology has gone through the development process of cement consolidation loading inclined plane, forging mill, mechanical seat seal guide, hydraulic slip positioning guide, etc. At present, hydraulic slip positioning guide is used more. However, positioning deflector tools such as hydraulic slips do not have a sealing design. Due to casing corrosion and water well scaling, the slips of the positioning deflector are not firmly anchored and the deflector is displaced, resulting in the failure of sidetra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/08
CPCE21B7/061
Inventor 王剑王虎李勇陈怡苏宁陈登齐巴特尔李奇龙秦世夕吴文
Owner 贵州地质工程勘察设计研究院有限公司
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