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A signal processing system and method for torque measurement

A technology for torque measurement and signal processing, applied in the field of drilling, can solve the problems of poor signal-to-noise ratio, effective torque response signal, weak voltage signal change, etc., to improve the measurement accuracy.

Active Publication Date: 2022-02-01
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Claims
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AI Technical Summary

Problems solved by technology

However, when the drill collar bears a small torque, the voltage signal change of the torque measuring device due to the influence of the torque is very weak, and the signal-to-noise ratio is poor. At this time, it is difficult to accurately measure the response by simply increasing the magnification Valid signal for torque

Method used

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  • A signal processing system and method for torque measurement
  • A signal processing system and method for torque measurement
  • A signal processing system and method for torque measurement

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Embodiment

[0040] 1. Drill collar device structure

[0041] see Picture 1-1 , The downhole torque measurement device while drilling provided by the implementation of the present invention includes: a downhole torque measurement and measurement drill collar installation body capable of bearing oil drilling pressure, a round hole for installing a torque measurement sensor array, a battery compartment, a pressure measurement circuit compartment, and an MWD interface Protocol circuit cabin.

[0042] The torque measurement sensor is arranged in an equidistant circular array in the axial direction of the drill collar body. It is composed of a torque measurement ring embedded with a torque and strain measurement body. The ring array can measure the short circuit of dynamic parameters during coiled tubing drilling. The measured torque signal is sent to the measurement signal conditioning circuit for corresponding signal processing, and converted into a digital torque value through AD sampling, ...

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Abstract

The invention relates to a signal processing system and method, belonging to the technical field of drilling, in particular to a signal processing system and method for torque measurement. Including: a controller connected in series, a waveform generator, an AC excitation amplifying circuit, a torque-strain measurement bridge, a pre-amplifier, a band-pass filter, a rear-stage amplifier, and a lock-in amplifier; wherein, the torque-strain measurement bridge The bridge arm is composed of torque and strain measuring bodies arranged in series on the outer wall of the drill collar and forming the same angle with the axis of the drill collar. Therefore, the present invention has the following advantages: 1. By adopting the measurement while drilling method, the torque on the drilling tool can be obtained in real time, thereby providing support for quickly adjusting the parameters of the drilling tool; 2. Using a plurality of measuring bodies on the ring structure of the torque measurement sensor To monitor the torque change, improve the measurement accuracy.

Description

technical field [0001] The invention relates to a signal processing system and method, belonging to the technical field of drilling, in particular to a signal processing system and method for torque measurement. Background technique [0002] MWD (Measurement While Drilling) means that the drilling rig continuously detects information about the drill hole or the drill bit while drilling. [0003] During the drilling process, the accurate measurement of drilling engineering parameters such as the drilling pressure and torque near the drill bit is very important for safe and efficient drilling. With the increase of drilling depth, especially in the development of various branch wells and horizontal wells, various drilling accidents such as stuck pipe, cone loss, and drill tool breakage occur from time to time, which brings great impact to the safety and efficiency of drilling production. Real-time measurement of changes in drilling engineering parameters such as WOB torque nea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/12
CPCE21B47/12
Inventor 贾衡天艾维平高文凯王家进毛为民洪迪峰盛利民窦修荣李明印
Owner BC P INC CHINA NAT PETROLEUM CORP
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