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Calibration method of underground bit pressure and torque measuring nipple

A technology for measuring pup joints and calibration methods, which is applied in the calibration/testing of force/torque/power measuring instruments, measuring devices, instruments, etc., and can solve problems such as heavy workload of weights, affecting calibration accuracy, and low calibration efficiency. Achieve the effects of improving efficiency, improving calibration accuracy, and improving accuracy

Active Publication Date: 2022-02-15
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] The weight-on-bit and torque calibration method disclosed in this patent document has a large mass of weights when calibrating a large-range measuring pup joint, and the beam is easily deformed, which affects the calibration accuracy, and the workload of repeated weight handling is large, and the calibration efficiency is low.

Method used

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  • Calibration method of underground bit pressure and torque measuring nipple
  • Calibration method of underground bit pressure and torque measuring nipple
  • Calibration method of underground bit pressure and torque measuring nipple

Examples

Experimental program
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Effect test

Embodiment 1

[0076] see Figure 1-Figure 4 , a method for calibrating a downhole weight-on-bit torque measuring sub, comprising the following steps:

[0077] a. According to the working conditions that need to be calibrated, install and connect the drilling pressure torque calibration device;

[0078] b. Use weights to load the measuring sub-joint 5 with the drilling pressure torque;

[0079] c. Draw weight weight, dial 18 value and the weight-on-bit torque curve in the software to calibrate the weight-on-bit torque of the measuring sub-section 5;

[0080] d. Load the measuring sub-joint 5 through the motor 24 or the hydraulic device, and perform the calibration of the measuring sub-joint 5 .

[0081] This embodiment is the most basic implementation. Not only can the measuring sub-joint 5 be directly calibrated by the weight, but also the weight on the bit torque calibration device can be calibrated first, and then the measuring sub-joint 5 can be calibrated by the bit pressure torque ca...

Embodiment 2

[0083] see Figure 1-Figure 4 , a method for calibrating a downhole weight-on-bit torque measuring sub, comprising the following steps:

[0084] a. According to the working conditions that need to be calibrated, install and connect the drilling pressure torque calibration device;

[0085] b. Use weights to load the measuring sub-joint 5 with the drilling pressure torque;

[0086] c. Draw weight weight, dial 18 value and the weight-on-bit torque curve in the software to calibrate the weight-on-bit torque of the measuring sub-section 5;

[0087] d. Load the measuring sub-joint 5 through the motor 24 or the hydraulic device, and perform the calibration of the measuring sub-joint 5 .

[0088] In the step a, the drilling weight torque calibration device includes a base 1, and the base 1 is fixedly connected with a short joint fixed support 3, a short joint righting support 6, a screw support 11, a worm gear support 14, and a worm support 21 And the motor support 22, the short jo...

Embodiment 3

[0092] see Figure 1-Figure 4 , a method for calibrating a downhole weight-on-bit torque measuring sub, comprising the following steps:

[0093] a. According to the working conditions that need to be calibrated, install and connect the drilling pressure torque calibration device;

[0094]b. Use weights to load the measuring sub-joint 5 with the drilling pressure torque;

[0095] c. Draw weight weight, dial 18 value and the weight-on-bit torque curve in the software to calibrate the weight-on-bit torque of the measuring sub-section 5;

[0096] d. Load the measuring sub-joint 5 through the motor 24 or the hydraulic device, and perform the calibration of the measuring sub-joint 5 .

[0097] In the step a, the drilling weight torque calibration device includes a base 1, and the base 1 is fixedly connected with a short joint fixed support 3, a short joint righting support 6, a screw support 11, a worm gear support 14, and a worm support 21 And the motor support 22, the short joi...

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Abstract

The invention discloses a calibration method for an underground bit pressure and torque measuring nipple, which belongs to the technical field of underground engineering while drilling. The method is characterized by comprising the following steps of: a mounting and connecting a bit pressure and torque calibration device according to a working condition required to be calibrated; b carrying out bit pressure and torque loading on the measuring nipple by adopting a weight; c drawing a curve graph of the weight, the dial value and the bit pressure and torque value in software, and calibrating the bit pressure and torque of the measuring nipple; and d loading the measuring nipple through a motor or a hydraulic device, and calibrating the measuring nipple. The calibration efficiency can be improved while the weight of the weight is reduced and the calibration precision is improved, and the method has the characteristics of high calibration precision of a wide-range measuring nipple and convenience in operation.

Description

technical field [0001] The invention relates to the technical field of downhole engineering while drilling, in particular to a calibration method for downhole drilling pressure torque measurement nipples. Background technique [0002] The downhole multi-parameter measurement-while-drilling system can measure downhole drilling pressure, torque, temperature, pressure and other engineering parameters in real time, accurately grasp the downhole working conditions, and realize timely detection and correct processing of the precursors of complex downhole conditions. The measuring sub of the downhole multi-parameter measurement while drilling system generally measures downhole WOB and torque through the strain principle. After a certain period of use, the measured electrical signal and real force will drift, resulting in inaccurate measurement of WOB torque. Therefore, the calibration of WOB and torque becomes very important. At present, the drilling weight torque calibration usua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L25/00
CPCG01L25/003
Inventor 黄崇君李雷张继川白璟邓虎贾利春李枝林万夫磊陈科旭范黎明周杨
Owner BC P INC CHINA NAT PETROLEUM CORP
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