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Leak protection plugging agent used during drilling for remarkably enhancing plugging effect

A significant technology for plugging while drilling, applied in the field of plugging while drilling, it can solve the problems of poor pressure bearing capacity, reduced plugging efficiency, poor shape matching, etc. The effect of high blocking rate

Inactive Publication Date: 2011-06-15
武侯区巅峰机电科技研发中心
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  • Summary
  • Abstract
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Problems solved by technology

However, these methods have not solved the fundamental problem of lost circulation, mainly due to poor pressure bearing capacity
The reason is that the particle size distribution of the conventional plugging agent is unreasonable, the shape of the particles does not match well with the shape of the plugged fractures and channels, and the lack of force extending into the well wall greatly reduces the plugging efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0026] The invention relates to a plugging agent while drilling which significantly improves the plugging effect, which comprises sodium 2-acrylamido-2-methylpropanesulfonate, acrylic acid, acrylamide, an initiator and a crosslinking agent, calculated by weight percentage , 2-methyl-2-acrylamidopropanesulfonic acid, acrylic acid and acrylamide account for 16.0% to 17.0%, water accounts for 80.0% to 82.0%, and the balance is initiator and crosslinking agent; by weight, 2 The ratio of methyl-2-acrylamidopropanesulfonic acid:acrylic acid:acrylamide is 1:2:7, and the ratio of initiator:crosslinking agent is 5:1.

[0027] In order to obtain the best mass percentage of 2-methyl-2-acrylamidopropanesulfonic acid, acrylic acid and acrylamide, the present invention has carried out experiments. This experiment is carried out under the situation of 10%, 11.1%, 12.5%, 14.3%, 16.7%, 20%, 25% in the mass percent of 2-methyl-2-acrylamidopropanesulfonic acid, acrylic acid, acrylamide, The per...

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PUM

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Abstract

The invention discloses a leak protection plugging agent used during drilling for remarkably enhancing plugging effect. The plugging agent comprises the following components in percentage by weight: 16.0 to 17.0 percent of 2-methyl-2-acrylamidopropanesulfonic acid, acrylic acid and acrylamide, 80.0 to 82.0 percent of water and the balance of initiator and cross linking agent. The effect of plugging along with drilling and leakage can be achieved, the plugging agent has high plugging rate and high loading capacity, and the plugging effect of well drilling is remarkably enhanced.

Description

technical field [0001] The invention relates to a leakage-while-drilling plugging agent which significantly improves the plugging effect. Background technique [0002] In order to improve drilling efficiency, reduce operating time and loss of working fluids such as mud, and reduce damage to reservoirs to obtain maximum economic benefits, the emergence of plugging while drilling provides a way to solve this problem. It is in It is a plugging technology of plugging while drilling in drilling engineering. [0003] Lost circulation agent while drilling is a new type of lost circulation agent developed at home and abroad in recent years with good application effect. At present, there is 801 plugging agent while drilling, which is made of wood shavings (a kind of wood containing vegetable glue after crushing, which contains cellulose, lignin, polypentose, etc.), humate, carboxymethyl It is a powder product made of cellulose and other polymer compounds compounded by scientific me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C09K8/42
Inventor 黄友华
Owner 武侯区巅峰机电科技研发中心
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