Device for evaluating filtration performance of drilling fluid on line

A drilling fluid and fluid loss technology, applied in measuring devices, liquid/fluid solids measurement, instruments, etc., can solve the problems of many operation steps, large sample volume, long time consumption, etc.

Inactive Publication Date: 2020-09-29
中石化石油工程技术服务有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the above process that this conventional method requires a large sample volume (about 300 cm3 to fill the sample cup), takes a long time (at least 30 minutes for the experimental process), and has many operating steps

Method used

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  • Device for evaluating filtration performance of drilling fluid on line
  • Device for evaluating filtration performance of drilling fluid on line
  • Device for evaluating filtration performance of drilling fluid on line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: The fluid loss body is made of stainless steel with a pressure resistance of 1.5 MPa. A displacement sensor is installed on the top, the stroke of the piston is 50mm, the ultrasonic generator is installed in the piston, and there is a filter medium at the bottom to filter impurities, and the filtered liquid flows out through the bottom port. On both sides of the main body, there are interfaces for connecting the clean water pump, mud pump and venting. The filter loss medium uses a repeatable 316L laser hole plate instead of filter paper and cooperates with an ultrasonic washing device to realize the repeated application of the filter loss medium; the holes on the filter loss medium are circular and evenly distributed, and the thickness of the medium is 1mm. The compression spring presses the filtered fluid loss medium and guides the liquid through the radiation groove at the bottom.

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PUM

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Abstract

The invention relates to a device for evaluating filtration performance of a drilling fluid on line. An online monitoring problem of a filter loss of the drilling fluid is solved, the filter loss of the drilling fluid can be continuously, regularly and accurately measured, and filtrate quality is obtained so that a filtrate density can be obtained, and a favorable technical support is provided forautomatic drilling. According to the technical scheme, a balance is used for recording weight change of filtrate along with time and transmitting the weight change into a database, the database collects filtrate weight and filtrate volume data for processing to obtain the density of the drilling fluid filtrate, and the density change of the filtrate is analyzed so that the filter loss performanceof the drilling fluid can be evaluated from multiple aspects.

Description

technical field [0001] The invention relates to the field of fluid loss measurement of related liquids in the petroleum development process, in particular to an automatic measurement device for drilling fluid fluid loss. Background technique [0002] At present, in our conventional drilling operations, the method of fluid loss measurement is mainly to use a fluid loss meter to conduct low-temperature and low-pressure experiments to obtain API fluid loss. This method should ensure that the components of the drilling fluid cup, especially the filter screen, are clean and dry, and that the sealing gasket is not deformed or damaged. During the test, inject the drilling fluid into the drilling fluid cup so that the liquid level is at least 13mm from the top (to reduce the pollution of the filtrate by carbon dioxide), then put the filter paper and install the instrument. Place a dry graduated cylinder under the drain to receive the filtrate. Close the pressure reducing valve and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F22/00
CPCG01F22/00
Inventor 罗云凤刘保双王忠杰慈国良张志财季一冰张冬玲马云谦
Owner 中石化石油工程技术服务有限公司
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