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Three-tube hybrid-type plastic fluid funnel viscosity on-line measuring device and method

A plastic fluid and measuring device technology, which is applied in the field of continuous automatic online measurement of drilling fluid funnel viscosity and on-line measuring device of drilling fluid funnel viscosity, can solve the problems of large errors, human factors, and long time consumption, etc., and achieve accurate measurement Fast, easy to compare and analyze, highly automated results

Active Publication Date: 2016-06-15
CHINA PETROCHEMICAL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since this parameter is obtained by manual measurement, there are still many problems when it is used to guide on-site construction: First, manual sampling of drilling fluid and manual measurement of funnel viscosity take a long time, which increases the labor intensity of on-site staff and increases the experimental The exposure time of personnel in a harmful environment is not conducive to the health of on-site personnel; secondly, manual measurement is easily affected by environmental and human factors, and the error of the result is large
However, the velocity of drilling fluid in the funnel varies with the height of the liquid level in the funnel, so the velocity gradient of the drilling fluid in the straight pipe of the funnel is different. For non-Newtonian fluids, the same fluid has different velocity gradients. Different apparent viscosity, that is to say, the apparent viscosity of the drilling fluid is a variable during the measurement process. If the apparent viscosity is used to calculate the funnel viscosity, the error is often large

Method used

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  • Three-tube hybrid-type plastic fluid funnel viscosity on-line measuring device and method
  • Three-tube hybrid-type plastic fluid funnel viscosity on-line measuring device and method
  • Three-tube hybrid-type plastic fluid funnel viscosity on-line measuring device and method

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specific Embodiment 1

[0017] A three-tube mixed-connection plastic fluid funnel viscosity online measuring device consists of a constant flow pump 1, a mass flow meter 2, a test tube group 3, four cylinder film pressure sensors (4, 5, 6, 7), and a data collector 8 It is composed of computer and data processing system 9. Among them, the test tube group 3 is composed of three glass straight tubes with a length of 80 cm, a radius of 5 cm, and a wall thickness of 2.75 mm. Different shear rates are generated in the pipeline and branch pipelines. The internal flow path of the tee joint is streamlined, and the cross-sectional areas of the joints are equal, so that the deformation of the fluid at a constant flow rate can be realized. Constant flow pump 1, mass flowmeter 2, and test tube group 3 are connected together through pipelines, pressure sensors (4, 5, 6, 7) and mass flowmeter 2 are connected to data collector 8 and computer and data through signal lines on the processing system 9 (also known as c...

specific Embodiment 2

[0029] combine figure 1 Connect the inlet pipe of the constant flow pump 1 with the drilling fluid container, connect the constant flow pump 1 with the mass flow meter 2 and the test tube group 3 in turn, connect the outlet with the drilling fluid container, digital acquisition and processor 8 flow meters and four The signal of each pressure sensor is collected in computer and data processing system 9.

[0030] The drilling fluid in the container is continuously circulated, and the flow and density measured by the mass flowmeter and the pressure recorded by the four pressure sensors are recorded in real time; the drilling fluid in the pipe is calculated according to the instantaneous value of the flow measured by the flowmeter and the geometric parameters of the pipeline The instantaneous value of the flow velocity gradient, and the instantaneous value of the shear stress in the pipe is calculated according to the pressure loss measured by the two pairs of pressure sensors on ...

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Abstract

The present invention relates to a three-tube hybrid-type plastic fluid funnel viscosity on-line measuring device and method, the three-tube hybrid-type plastic fluid funnel viscosity on-line measuring device includes a constant flow pump, a mass flow meter, a test tube group, a connecting pipe, pressure sensors, a data collector and a data processing system, wherein the test tube group is connected with other two parallel branch pipelines via a main pipeline by a three-way connector, and then is connected with the connecting pipe, the four pressure sensors are divided into two groups, and the two groups are respectively arranged on the main pipeline and the wall of one of the branch pipelines. The measuring method is as follows: shear rates and shear stress of different locations in a pipeline are recorded by the mass flow meter and the pressure sensors connected in the hybrid-type pipeline, resulting data is inputted via a data acquisition system, dynamic shear force and plastic viscosity instantaneous value can be obtained by calculation, and the fluid funnel viscosity can be further calculated according to energy conservation. The three-tube hybrid-type plastic fluid funnel viscosity on-line measuring device and method can be used for continuous automatic on-line measurement of drilling fluid funnel viscosity and monitoring of changes of the drilling fluid funnel viscosity in a construction site.

Description

technical field [0001] The invention belongs to the technical field of drilling fluid rheology measurement, and in particular relates to an on-line measurement device and method for drilling fluid funnel viscosity, which is suitable for continuous automatic on-line measurement of drilling fluid funnel viscosity on site. Background technique [0002] During the drilling process, the measurement of the viscosity of the drilling fluid is an important basis for preventing blowout and kick, adjusting the rheological properties of the drilling fluid, maintaining the stability of the borehole wall, and balancing the formation pressure. The funnel viscosity is an important parameter to characterize the comprehensive fluidity of the fluid. It plays a vital role in the preparation and maintenance of drilling fluid; in geological logging work, the change of drilling fluid viscosity will affect the efficiency of the degasser, and the measurement of drilling fluid viscosity can realize th...

Claims

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Application Information

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IPC IPC(8): G01N11/06
Inventor 史涛刘保双蔺琳马云谦张冬玲罗云凤
Owner CHINA PETROCHEMICAL CORP