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Mudstone density measuring process

A technology for density determination and mudstone, which is used in material analysis by measuring buoyancy, special data processing applications, instruments, etc. It can solve the problems of complicated operation, large volume of instruments, and large amount of pure water, and achieve accurate measurement and large measurement container. Effect

Inactive Publication Date: 2007-10-03
SHANGHAI SHENKAI GASOLINEEUM TECH
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Problems solved by technology

Both require that the cross-sectional area of ​​the steel wire is much smaller than the internal cross-sectional area of ​​the cylindrical container, which makes the required amount of pure water large, and the volume of the entire instrument is too large, and the internal diameter of the cylindrical container reaches 100mm. The instrument uses visual observation to measure the linear displacement of the upper plate. There are large differences and errors in the naked eye observation itself, so it is difficult to achieve the accuracy index, and the operation is more cumbersome. It is difficult to guarantee the measurement accuracy by visual inspection.

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Embodiment

[0058] As shown in Figure 4, it is a structural schematic diagram of a mudstone density measuring instrument. The mudstone density measuring instrument is composed of an upper wall 1, a lower wall 2, a steel wire 3, a container 6, and a tension sensing device 7. The steel wire 3 is vertically connected up and down with each other. The upper wall 1 and the lower wall 2 are parallel, the upper wall 1 is arranged on the upper end of the container 6, exposed in the air, the lower wall 2 is immersed in the pure water in the container 6, and the top of the steel wire 3 is provided with a tension sensing device 7, The wall of the container 6 is provided with a self-overflow 8, and the container 6 is installed in the container 9. The container 6 has a self-overflow 8 in order to maintain the liquid level of pure water. Load cell, preamplifier, signal processing and tension display module. The main component is a high-precision tension sensor. The biggest feature of this sensor is that ...

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Abstract

The mudstone density measuring instrument includes a container holding pure water, an upper disc over the container and exposed in the air, a lower disc immersed in pure water, and a steel wire connecting the parallel upper disc and lower disc. It features the tensile force inducing unit set in the top of the steel wire and the container with overflow port in the wall. The present invention measures the tensile force of the steel wire with the tensile force inducing unit, outputs signal based on force balance and obtains mudstone density through signal processing and calculation. In addition, setting the measured article inside water and overflowing the excessive water can reduce the size of the measuring device.

Description

technical field [0001] The invention relates to a method for measuring the density of mudstone, which can be used for measuring the density of mudstone in the oil drilling process, and can also be used for measuring the density of small-volume water-insoluble substances in other fields, and belongs to the technical field of density measurement. Background technique [0002] In the process of oil drilling, abnormal formation pore pressure is extremely dangerous for oil wells, which may cause accidents such as well kick, blowout, lost circulation, well diameter shrinkage, stuck pipe, etc. Mudstone with abnormal formation pore pressure has reached the formation It is characterized by a decrease in mudstone density, which deviates from the normal trend line of mudstone density. Therefore, the method of measuring the mudstone density can be used to predict the abnormal pore pressure of the formation. By measuring the mudstone density in real time, the pressure change of the drill...

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Application Information

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IPC IPC(8): G01N9/08G06F19/00
Inventor 袁建新邱善乐
Owner SHANGHAI SHENKAI GASOLINEEUM TECH
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