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Fault Diagnosis Method, Device and Application of Rotary Steerable Drilling Tool Measurement and Control System

A technology of rotary steerable drilling and measurement and control system, which is applied in directional drilling, drilling equipment and methods, drilling equipment, etc., and can solve problems such as poor reliability.

Active Publication Date: 2021-04-16
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the aforementioned problems such as the poor reliability of existing rotary steerable drilling tool measurement systems, and provides a fault diagnosis method, device and application of a highly reliable rotary steerable drilling tool measurement and control system, which can improve the accuracy of fault detection, and further Improve drilling efficiency and reduce drilling costs

Method used

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  • Fault Diagnosis Method, Device and Application of Rotary Steerable Drilling Tool Measurement and Control System
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  • Fault Diagnosis Method, Device and Application of Rotary Steerable Drilling Tool Measurement and Control System

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Embodiment 1

[0089] Embodiment 1: This embodiment provides a fault diagnosis method for the measurement and control system of a rotary steerable drilling tool, see figure 1 , the specific steps are:

[0090] S1. Judging whether the measurement and control system is faulty according to the collected motor current, motor speed, gyroscope measurement value and tool face angle. If there is no fault, continue to judge. If there is a fault, execute step S2.

[0091] Specifically, the specific steps for judging whether the measurement and control system is faulty are as follows:

[0092] The mathematical model of the measurement and control system is constructed according to the motor current, motor speed, gyroscope measurement value and tool face angle. The mathematical model of the measurement and control system is expressed as:

[0093]

[0094] In the formula, is the state quantity of the measurement and control system, u(t) is the control quantity of the measurement and control system,...

Embodiment 2

[0148] Example 2: see Image 6 , this embodiment provides a fault diagnosis device for implementing the fault diagnosis method of the rotary steerable drilling tool measurement and control system described in Embodiment 1, the fault diagnosis device includes:

[0149] A data interaction unit for collecting sensor measurement information;

[0150] The fault detection unit is connected with the data interaction unit, and detects whether the sensor is faulty according to the collected measurement information;

[0151] The working condition monitoring unit is connected with the fault detection unit, and judges the current working condition according to the measurement information;

[0152] The fault static verification unit is connected with the working condition monitoring unit, and when it is judged that the working condition is a drilling stop condition, static verification is performed on the gyroscope fault and the accelerometer fault;

[0153] The dynamic fault separation ...

Embodiment 3

[0157] Embodiment 3: see Figure 7 to Figure 10 , this embodiment provides a rotary steerable drilling tool measurement and control system, including:

[0158] Stable platform 12;

[0159] Drive unit, comprises the motor 8 that is connected with stable platform 12 and the stable platform motor driver board that is connected with motor 8;

[0160] Sensor unit, consisting of:

[0161] The gyroscope is installed in the gyroscope mounting groove 13 on the surface of the stable platform 12, and its sensitive axis coincides with the axis 1 of the stable platform;

[0162] The first accelerometer is installed on the stable platform 12, its x-axis coincides with the stable platform axis 1, the y-axis is parallel to the coordinate axis y-axis of the stable platform 12, and the z-axis is parallel to the coordinate axis z-axis of the stable platform 12;

[0163] The second accelerometer is installed on the stable platform 12, and its position is located at the installation position ob...

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Abstract

The invention relates to a fault diagnosis method, device and application of a rotary steerable drilling tool measurement and control system. The specific steps of the fault diagnosis method are: S1. Judging according to the collected motor current, motor speed, gyroscope measured value and tool face angle Whether the measurement and control system is faulty, if there is no fault, then continue to judge, if there is a fault, then execute step S2; S2, judge the current working condition, if it is a continuous drilling working condition, then perform dynamic separation of sensor faults, and locate the faulty sensor position; In the case of drilling stoppage, sensor failure verification is performed to locate the location of the faulty sensor; S3. Reconstruct the measurement information of the faulty sensor according to the location of the faulty sensor. The invention can perform autonomous fault diagnosis on the sensor of the rotary steerable drilling tool, automatically locate the faulty sensor and automatically switch to the corresponding reconstruction scheme, thereby improving the reliability of the measurement and control system and helping to improve the drilling efficiency.

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 fault diagnosis method, device and application of a rotary steerable drilling tool measurement and control system. Background technique [0002] In oil directional drilling technology, according to the different guiding methods, it can be divided into two types: pushing type and pointing type, and each guiding method can be divided into static type and dynamic type according to whether the drill collar rotates. Four types of rotary steerable drilling techniques are proposed. The dynamic pointing rotary steerable system realizes the closed-loop control of the tool face angle. The principle is: the rotary steerable drilling tool is designed with a motor-controlled stable platform inside. The angular position remains geostationary, thereby realizing tool face angle control. The measurement and control system for rota...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/06E21B47/00E21B47/022G06Q50/02
CPCE21B7/06E21B7/061E21B47/00E21B47/022G06Q50/02
Inventor 王伟亮耿艳峰程民彪盛立
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)