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Method for estimating tool face angle of rotary steering drilling tool system

A technology of rotary steerable drilling and tool face angle, which is applied in directional drilling, earthwork drilling, wellbore/well components, etc., can solve the problem of low estimation accuracy of tool face angle, reduce computational complexity, improve efficiency, improve Effect of Estimation Accuracy

Active Publication Date: 2021-09-07
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the problem of low estimation accuracy of the tool face angle existing in the existing rotary steerable drilling tool system, and provides a tool face angle estimation method of the rotary steerable drilling tool system, which can improve the estimation accuracy of the tool face angle, thereby improving the drilling efficiency, Lower Drilling Costs

Method used

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  • Method for estimating tool face angle of rotary steering drilling tool system
  • Method for estimating tool face angle of rotary steering drilling tool system
  • Method for estimating tool face angle of rotary steering drilling tool system

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Embodiment Construction

[0039] In the following, the present invention will be specifically described through exemplary embodiments. It should be understood, however, that elements, structures and characteristics of one embodiment may be beneficially incorporated in other embodiments without further recitation.

[0040] see figure 1 , an embodiment of the present invention provides a method for estimating a tool face angle of a rotary steerable drilling tool system, the specific steps of which are:

[0041] S1. Establish a mathematical model of the tool face angle control system; the specific steps are:

[0042]Combined with the mathematical model of the d-q coordinate system of the permanent magnet synchronous motor, the mathematical model of the tool face angle control system is constructed as follows:

[0043]

[0044] In the formula,

[0045]

[0046]

[0047] x is the state variable, y is the measurement output, is the first derivative of the state variable x, x 1 = i d ,x 2 = i...

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Abstract

The invention relates to a method for estimating a tool face angle of a rotary steering drilling tool system. The method comprises the following specific steps: S1, establishing a mathematical model of a tool face angle control system; S2, constructing a state observer, and obtaining an estimation error system; S3, solving parameters of the state observer to complete design of the state observer; and S4, receiving measurement data, and performing tool face angle estimation. The tool face angle of the rotary steerable drilling tool system can be effectively estimated in real time, the estimation precision is improved, the calculation complexity of an estimation algorithm is reduced, and the steerable drilling precision can be further improved.

Description

technical field [0001] The invention belongs to the technical field of oil field drilling, and relates to a drilling tool measurement technology, in particular to a method for estimating a tool face angle of a rotary steerable drilling tool system. Background technique [0002] Oil and gas are important resources for national strategic development, and drilling technology is a key technology for oil and gas exploration and development. As one of the most advanced directional drilling technologies in the world today, rotary steerable drilling technology has the advantages of high ROP, high accuracy of well trajectory control, good borehole purification effect, and strong displacement extension ability, which can greatly improve oil and gas recovery efficiency. During the development process in recent decades, four types of rotary steerable drilling tool systems, static pushing, dynamic pushing, static pointing, and dynamic pointing, have gradually been formed due to the diffe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20E21B47/024E21B7/04
CPCG06F30/20E21B7/04E21B47/024
Inventor 盛立牛艺春高明耿艳峰周东华
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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