Digital display type drill rod and drill core tribometer

A technique for measuring friction and measuring instruments, which is applied in the direction of instruments, measuring devices, and mechanical devices, etc. It can solve problems such as large errors and unstable measurement values, achieve high accuracy, eliminate unstable effects, and have a wide range of applications

Inactive Publication Date: 2010-12-15
CENT SOUTH UNIV
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  • Description
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AI Technical Summary

Problems solved by technology

The disadvantage of this instrument is that the spring is used as the measuring medium, the error is large, and the measured value is unstable; the simple nozzle is used as the drilling fluid application device, which is only suitable for measuring clear water or low-concentration non-solid-phase lubricating drilling fluid, but for mud or other high Concentration drilling fluid is not applicable

Method used

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  • Digital display type drill rod and drill core tribometer
  • Digital display type drill rod and drill core tribometer
  • Digital display type drill rod and drill core tribometer

Examples

Experimental program
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Effect test

Embodiment 1

[0020] The digital display drill pipe and core friction tester is mainly composed of the following six parts (see Figure 1~3 ): motor 1, balance frame (i.e. support) 4, rock core clamping and pressurizing device 13 (see attached image 3 ), drilling fluid tank 7, simulated drill pipe 6 and sensor 10 (model: Hunan Aerospace GZB-2A).

[0021] The power of the motor is 75-100 watts, the linear speed of the outer edge of the simulated drill pipe is 1.61-3.06 m / s, and the measuring range of the sensor is 0-15N.

[0022] After the pressurization and clamping device are counterweighted, the guide rod 8 is connected to the sensor 10, and the sensor is leveled until the sensor shows zero. Note that the central axis of the sensor must be kept on a horizontal line with the contact surface between the core 12 and the simulated drill pipe 6. This reduces measurement errors and improves the accuracy of the device. After the preparatory work is completed, start the motor to drive the simu...

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Abstract

The invention provides a digital display type drill rod and drill core tribometer. A drill core is fixed at the lower end of a pressurizing and holding device, the pressurizing and holding device is arranged on a support, and the upper end of the pressurizing and holding device is provided with a pressurizing cake. A simulation drill rod is connected with a shaft of a motor and rotates along with the shaft, the drill core is pressed on the simulation drill rod, and a guide rod for transmitting the friction force between the drill core and the rotating simulation drill rod is connected with a sensor after penetrating through the pressurizing cake. The digital display type drill rod and the drill core tribometer has convenient detection, small and exquisite structure and stable and accurate reading.

Description

technical field [0001] The technology of the invention relates to a digital display type drill pipe and rock core friction measuring instrument. technical background [0002] At present, the instruments for measuring the coefficient of friction are generally in the field of measuring the friction force (coefficient) of metal-metal friction pairs. In the field of drilling technology, the measurement of the friction between the drill pipe and the hole wall is a hot research issue, that is, the friction between the metal-rock friction pair. Therefore, it is urgent to develop a measuring device capable of measuring the wet friction of the metal-rock friction pair. In 1985, Lu Fan of Central South Institute of Mining and Metallurgy (now Central South University) developed a direct-reading friction coefficient tester (patent number: CN85200204U). Hooke's Law uses the compression of a spring as a direct measure of friction. The disadvantage of this instrument is that the spring ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/02
Inventor 隆威任慧莉何智敏
Owner CENT SOUTH UNIV
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