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Wellbore Stabilizer

A wellbore stabilizer and stabilizer technology, applied in drilling compositions, chemical instruments and methods, etc., can solve problems such as loss of enterprises and countries, difficulty in running casing, environmental pollution, etc., to reduce drilling costs and shorten the The drilling cycle and market prospects are promising

Inactive Publication Date: 2011-12-07
董殿武
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the collapse of the borehole wall causes pipe sticking, difficulty in drilling, difficulty in logging, and difficulty in running casing, and even causes major accidents such as drilling tools being buried and wellbore scrapped, causing huge losses to the enterprise and the country
Especially in recent years, the drilling industry has mostly used wireless logging while drilling (LWD). Once the drilling tool is buried and the neutron source falls into the well, it will cause a major environmental pollution accident

Method used

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Experimental program
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Embodiment Construction

[0016] The present invention will be further described below in conjunction with embodiment.

[0017] The optimal weight percentage of each component of well wall stabilizer is:

[0018] Sodium bentonite 30%-50%

[0019] Hydrolyzed polyacrylonitrile ammonium salt 20%-40%

[0020] Activated graphite fine powder 20%-40%.

[0021] The bentonite is selected to comply with SY5490-93 sodium bentonite for drilling fluid.

[0022] The quality inspection standard of sodium bentonite:

[0023] 1. Sensory properties: This product is a white or pink powder substance.

[0024] 2. Moisture: the moisture content shall not exceed 12.0%.

[0025] 3. Main ingredients: Bentonite contains 85-90% montmorillonite, 50-75% silicon oxide, 15-25% lead oxide, and a specific gravity of 2.4-2.8. In addition, it also contains P, KNa, Ca, Mg, Fe, Cu, Mn, Cr, Si, Ni, Ti, V and other constant and trace elements.

[0026] 4. The particle size is 100-120 mesh.

[0027] Hydrolyzed polyacrylonitrile ammon...

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Abstract

The invention relates to a well wall stabilizer which protects the well wall during oil drilling. The stabilizer consists of the following components by weight percentage: 30%-50% of sodium bentonite; 20% of hydrolyzed polyacrylonitrile ammonium salt -40%; activated graphite fine powder 20% -40%. It is prepared by mixing the above components by weight percentage using dry powder mixing equipment. The beneficial effects of the invention are: in the oil drilling process, the use of the invention can reduce and avoid drilling accidents easily caused by well wall instability. At the same time, due to smooth tripping and tripping, smooth electrical logging and casing running, it can significantly reduce the time of tripping and tripping, well logging and drilling time, thereby shortening the drilling cycle and reducing drilling costs. Widely used new mud treatment agent.

Description

technical field [0001] The invention relates to a mud treatment agent used in oil drilling, in particular to a well wall stabilizer (code name WBS, abbreviation of Well Bore Stablizer) which protects the well wall during the oil drilling process. Background technique [0002] Oil drilling is a high-risk and high-investment industry. The key to the success of drilling engineering and data acquisition lies in the protection of the well wall and the stability of the wellbore. At present, there are many drilling accidents caused by mud dehydration and well wall instability in drilling engineering. For example, the collapse of the borehole wall causes pipe sticking, difficulty in drilling, difficulty in logging, and difficulty in running casing, and even causes major accidents such as drilling tools being buried and wellbore scrapped, causing huge losses to the enterprise and the country. Especially in recent years, the drilling industry has mostly used wireless logging while dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/46
Inventor 董殿武
Owner 董殿武
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