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Arrangement of strain gauges and bridge connection method of a measurement-while-drilling device

A technology of measurement while drilling and layout method, which is applied in the direction of measuring device, electromagnetic measuring device, measurement, etc. It can solve the problems that bending moment parameters cannot be measured and affect the accuracy of measurement, etc., and achieve the effect of ensuring accuracy and simplifying the measurement circuit

Active Publication Date: 2022-06-24
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

In the pasting method of the strain gauges given in this patent, the overlapping of two strain gauges may affect the accuracy of the measurement, and the bending moment parameters cannot be measured

Method used

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  • Arrangement of strain gauges and bridge connection method of a measurement-while-drilling device
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  • Arrangement of strain gauges and bridge connection method of a measurement-while-drilling device

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] figure 1 Shown is the installation method of the measuring strain gage on the short drill collar. In order to make the strain gauge stick flat on the surface of the short drill collar, a circular plane needs to be milled on the surface of the short drill collar, and the strain gauge is pasted on this plane. A total of six planes are milled around the short drill collar, which are 0°, α, β°, 180°, α+180°, and β+180° in the circumferential direction (in this embodiment, α and β are respectively taken as values 60°, 120°). The specific pasting methods of strain gauges on these six planes are as follows: figure 2 shown. Among them, eight strain gauges are pasted on the two planes of 0° and 180°, each of which points to the center of the circular plane, and the interval between each strain gauge is 45 degrees. Among them, the four strain gauges parallel and per...

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Abstract

A method of arrangement of strain gauges and an electric bridge connection method of a measurement-while-drilling device. First, six circular measurement planes for installing strain gauges are milled out on the surface of a short drill collar along the circumferential direction. The positions of the six circular measurement planes are: 0°, α, β, 180°, α+180°, β+180°; 8 strain gauges are pasted in the same arrangement on the two measuring planes of 0° and 180°, and the distance between two adjacent pieces is 45 degrees, each piece points to the center of the circle, and the distance from the center of the circle is the same; use the same method on the remaining four measurement planes, paste 4 strain gauges around the center of the circle, and the interval between two adjacent pieces is 90 degrees; bridge: The general principle is to connect two strain gauges separated by 180 degrees on each measurement plane to the same bridge arm. The method of the invention can not only measure the pressure-on-bit torque but also the bending moment received by the short drill collar, and avoids the mutual overlapping and pasting of the strain gauges, thereby ensuring the accuracy of the measurement.

Description

technical field [0001] The invention belongs to the field of measurement while drilling, and in particular relates to a strain gauge arrangement method of a measurement while drilling device and an electric bridge bridging method. Background technique [0002] In the process of oil and gas drilling, the accuracy of the measurement-while-drilling measurement of engineering parameters such as weight on bit, torque and bending moment near the bit is very important for efficient and safe drilling. Drillers can analyze, process and compare the actual drilling process through real-time and accurate measurement of engineering parameters near the drill bit, and then guide the drilling process. And by summarizing the influence of each measurement parameter on the drilling process and efficiency, some drilling accidents can be detected and controlled in time, so as to achieve the purpose of safe and efficient drilling, and truly realize risk-free drilling. [0003] In the drilling pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/01G01B7/16G01L3/00
CPCE21B47/01G01B7/18G01L3/00
Inventor 梁海波陈宁立刘子熠许兰杨硕周芮
Owner SOUTHWEST PETROLEUM UNIV
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