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Calibration method and system used for torque measuring

A technology of torque measurement and calibration method, applied in the field of drilling, can solve the problems of poor engineering parameter accuracy, difficult to calculate accurately, complicated interaction process between drill string and wellbore, etc., and achieve the effect of improving measurement accuracy

Active Publication Date: 2018-09-28
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the well-known drilling monitoring technologies use surface torque meters and weight gauges to measure torque and WOB. Due to the complex interaction process between the drill string and the well wall during drilling, the accuracy of engineering parameters near the drill bit can be calculated from the ground measurement data. poor
And the drill collar is subjected to buoyancy and friction in the drilling fluid, the impact force and elastic force of the drill collar, the friction force of the irregular wellbore wall on the drill collar, the centrifugal force of the helical bending and rotation of the drill collar, and the drill collar in the downhole. Factors such as longitudinal vibration and lateral vibration are not easy to calculate accurately. Even if there are many factors considered in the calculation model, the accuracy and reliability of the calculation results are very low.

Method used

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  • Calibration method and system used for torque measuring
  • Calibration method and system used for torque measuring
  • Calibration method and system used for torque measuring

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Experimental program
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Effect test

Embodiment

[0075] 1. Drill collar device structure

[0076] 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.

[0077] 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 calibration method and system, and belongs to the technical field of drilling, and particularly relates to the calibration method and system used for torque measuring. According to the method and the system, different torques are generated by using a large torque calibration device to be loaded on a drilling collar body of a drilling well lower torque measuring device, calibration is conducted by using measured electric signals and corresponding pressure, and the influence of temperature is taken into account when calibration is conducted to improve the measuring precision.

Description

technical field [0001] The invention relates to a calibration method system, which belongs to the technical field of drilling, in particular to a calibration method system 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 near the drill bit ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L25/00
CPCG01L25/003
Inventor 高文凯李中李明印钟尤刚黄熠罗鸣陈浩东顾纯巍李炎军贾衡天张磊范锦辉
Owner BC P INC CHINA NAT PETROLEUM CORP
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