Tool face angle estimation method for rotary steerable drilling tool system

A rotary steerable drilling and tool face angle technology, applied in directional drilling, earthmoving, wellbore/well components, etc., can solve the problem of low tool face angle estimation accuracy, reduce computational complexity, improve estimation accuracy, The effect of improving efficiency

Active Publication Date: 2022-08-02
CHINA UNIV OF PETROLEUM (EAST CHINA)
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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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  • Tool face angle estimation method for rotary steerable drilling tool system
  • Tool face angle estimation method for rotary steerable drilling tool system
  • Tool face angle estimation method for rotary steerable drilling tool system

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Embodiment Construction

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

[0040] see figure 1 , the embodiment of the present invention provides a tool face angle estimation method for 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 q ,x 3 =ω m , x ...

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Abstract

The invention relates to a tool face angle estimation method for a rotary steerable drilling tool system. The specific steps are: S1, establishing a mathematical model of a tool face angle control system; S2, constructing a state observer to obtain an estimation error system; S3, solving the state observation The design of the state observer is completed according to the parameters of the state observer; S4, the measurement data is received, and the tool face angle is estimated. The invention can effectively estimate the tool face angle of the rotary steerable drilling tool system in real time, improves the estimation accuracy, reduces the computational complexity of the estimation algorithm, and can further improve the steerable drilling accuracy.

Description

technical field [0001] The invention belongs to the technical field of oilfield drilling, and relates to drilling tool measurement technology, in particular to a tool face angle estimation method for a rotary steerable drilling tool system. Background technique [0002] Oil and gas are important resources for national strategic development, and drilling technology is the key technology for oil and gas exploration and development. As one of the most advanced directional drilling technologies in the world, rotary steerable drilling technology has the advantages of high ROP, high wellbore trajectory control accuracy, good wellbore purification effect, and strong displacement extension ability, which can greatly improve oil and gas recovery efficiency. In the development process in recent decades, four types of rotary steerable drilling tool systems have been gradually formed due to the different steering methods and the rotation of the drill collar. [0003] The dynamic pointi...

Claims

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Application Information

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Patent Type & Authority Patents(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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