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Compound plugging agent

A plugging agent and composite gel technology, applied in the field of building materials, can solve the problems of limited plugging capacity, difficult to control the size, poor plugging effect, etc., and achieve a wide range of applicable temperatures, hourly strength and compression resistance High strength, high plugging strength effect

Active Publication Date: 2015-10-21
GUILIN HEXIN WATERPROOF DECORATION MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When directly using plant fibers such as cottonseed hulls for plugging, due to the inherent characteristics of these fibers: too light specific gravity, difficult to control size, easy to knot, poor fluidity and other factors, the plugging effect is poor during use and the pressure bearing capacity is weak; while particles or The plugging ability of powdery plugging agent for large cracks is limited; when using bridging plugging agent, there are phenomena of "door sealing" (the plugging agent cannot enter the leaky layer) and "regurgitation" (leakage after plugging)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Take the raw material by the following parts by weight:

[0024]

[0025] 2) All the raw materials are added into the mixing equipment and stirred evenly to obtain the product.

[0026] The composite gel material is a mixture of 5 parts of silicone rubber, 10 parts of sulfoaluminate cement and 20 parts of polytetrafluoroethylene; the toughening agent is fiber cotton; the coagulation accelerator is 10 parts of salt gypsum, 10 parts of silicon dioxide and 8 parts of sodium sulfate; the curing agent is a mixture of 10 parts of melamine, 10 parts of talcum powder and 10 parts of bentonite; the dispersant is a mixture of 8 parts of sodium tripolyphosphate and 10 parts of sodium hexametaphosphate; the parts are parts by weight.

[0027] The particle size of talc powder is 0.022mm; the particle size of polytetrafluoroethylene is 0.01mm.

Embodiment 2

[0029] 1) Take the raw material by the following parts by weight:

[0030]

[0031] 2) All the raw materials are added into the mixing equipment and stirred evenly to obtain the product.

[0032] The composite gel material is a mixture of 7 parts of silicone rubber, 13 parts of sulfoaluminate cement and 12 parts of polytetrafluoroethylene; the toughening agent is fiber cotton; the coagulation accelerator is 13 parts of salt gypsum, 9 parts of silicon dioxide and 7 parts of sodium sulfate; the curing agent is a mixture of 13 parts of melamine, 9 parts of talc and 9 parts of bentonite; the dispersant is a mixture of 9 parts of sodium tripolyphosphate and 9 parts of sodium hexametaphosphate; the parts are parts by weight.

[0033] The particle size of talc powder is 0.020mm; the particle size of polytetrafluoroethylene is 0.02mm.

Embodiment 3

[0035] 1) Take the raw material by the following parts by weight:

[0036]

[0037] 2) All the raw materials are added into the mixing equipment and stirred evenly to obtain the product.

[0038] The composite gel material is a mixture of 8 parts of silicone rubber, 15 parts of sulfoaluminate cement and 15 parts of polytetrafluoroethylene; the toughening agent is fiber cotton; the coagulation accelerator is 15 parts of salt gypsum, 8 parts of silicon dioxide and 6 parts of sodium sulfate; the curing agent is a mixture of 15 parts of melamine, 8 parts of talcum powder and 7 parts of bentonite; the dispersant is a mixture of 11 parts of sodium tripolyphosphate and 8 parts of sodium hexametaphosphate; the parts are parts by weight.

[0039] The particle size of talc powder is 0.017mm; the particle size of polytetrafluoroethylene is 0.03mm.

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Abstract

The invention relates to the technical field of building materials, in particular to a compound plugging agent, which is prepared from the following raw materials in parts by weight: 55 to 75 parts of composite gel material, 2 to 8 parts of flexibilizer, 3 to 9 parts of coagulating enhancer, 12 to 22 parts of curing agent and 7 to 5 parts of dispersant. The compound plugging agent provided by the invention has rigidness and flexibility, has the effects of transforming and filling, simultaneously, has the effects of bridging and transforming and filling, the use amount of plugging materials is greatly reduced and the cost is lowered.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a composite plugging agent. Background technique [0002] Lost circulation is one of the factors that have the greatest impact on drilling speed and drilling cost in various complex situations, and it is a difficult problem that plagues oil and gas drilling. Once lost circulation occurs, it not only needs to consume a large amount of drilling fluid materials and plugging materials, but also prolongs the engineering time, increases the cost of development, and even causes downhole accidents such as stuck drill, buried drill and scrapped the whole well. At present, there are many plugging agents with different characteristics in the domestic market, some of which are plant fiber plugging agents mainly composed of cotton fibers, peanut shells, walnut shells and other plant fibers; some are mainly composed of asphalt-limestone mixture, potassium humate, and granular substa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06
Inventor 黄志强王继发刘泓铭
Owner GUILIN HEXIN WATERPROOF DECORATION MATERIAL
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