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Drilling fluid dynamic damage evaluation instrument

A drilling fluid and dynamic technology, applied in the field of drilling and exploration, can solve the problems of inability to evaluate the damage of drilling fluid, and achieve the effects of improving the accuracy of damage evaluation, the accuracy of acquisition, and the flexibility of selection.

Active Publication Date: 2021-02-19
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, a drilling fluid dynamic damage evaluation instrument provided by the present invention solves the problem that the existing evaluation instrument cannot accurately evaluate the drilling fluid damage

Method used

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Embodiment Construction

[0037] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0038] Such as figure 1 , figure 2 , image 3 and Figure 4 As shown, the drilling fluid dynamic damage evaluation instrument includes a controller 10 and a bracket 1, a kettle body 2 is arranged on the bracket 1, a well 4 for placing drilling fluid is arranged inside the kettle body 2, and a well cover is arranged on the upper end of the kettle body 2 6. The side of the kettle body 2 is provided with a core holding ass...

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Abstract

The invention discloses a drilling fluid dynamic damage evaluation instrument, belongs to the field of drilling exploration. The instrument comprises a controller and a bracket, wherein a kettle bodyis arranged on the bracket; a well for placing a drilling fluid is arranged in the kettle body; a well cover is arranged at the upper end of the kettle body; a rock core clamping assembly communicating with the well is arranged on the side surface of the kettle body; a metering assembly is movably arranged at the other end of the rock core clamping assembly; a stirrer for stirring the drilling fluid is arranged in the well, and a power part for driving the stirrer is arranged outside the kettle body; and the well cover is provided with a data detection hole used for installing a temperature and pressure sensor and a pressurizing hole used for installing a pressurizing device. According to the invention, the drilling fluid can be prevented from being retained in a flow guide chamber, and meanwhile, the drilling fluid in the glass core can also be counted, so the acquisition precision of the filter loss of the drilling fluid can be greatly improved, and then the damage evaluation precision of the drilling fluid is improved.

Description

technical field [0001] The invention relates to the field of drilling exploration, in particular to a drilling fluid dynamic damage evaluation instrument. Background technique [0002] Lost circulation is one of the most troublesome drilling problems. Some well control problems may also result from increased economic costs due to the loss of expensive drilling fluids into the formation. The incidence of lost circulation in the world accounts for about 20% to 25% of the total number of wells, so lost circulation has always been a concern at home and abroad. [0003] Filtration refers to the penetration of free water in the drilling fluid into the cracks or pores of the well wall rock under the action of pressure difference. During the filtration process, some solid particles in the drilling fluid will adhere to the well wall to form a mud cake. After the mud cake is formed on the well wall, it will prevent or slow down the further intrusion of water in the drilling fluid in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/04
CPCG01N13/04
Inventor 佘继平李阳倪建军韩凯张浩
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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