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A 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: 2017-12-19
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) Weigh the raw materials according to the following parts by weight:

[0024]

[0025] 2) Add all the raw materials to the mixing equipment and mix them evenly to obtain the product.

[0026] The composite gel material is a mixture of 5 parts of silicone rubber, 10 parts of sulphoaluminate cement and 20 parts of polytetrafluoroethylene; the toughening agent is fiber cotton; the coagulant strengthening agent is 10 parts of salt gypsum, 10 parts of silica and 8 parts of sodium sulfate; curing agent is a mixture of 10 parts of melamine, 10 parts of talc and 10 parts of bentonite; dispersing agent is a mixture of 8 parts of sodium tripolyphosphate and 10 parts of sodium hexametaphosphate; said parts are parts by weight.

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

Embodiment 2

[0029] 1) Weigh the raw materials according to the following parts by weight:

[0030]

[0031] 2) Add all the raw materials to the mixing equipment and mix them evenly to obtain the product.

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

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

Embodiment 3

[0035] 1) Weigh the raw materials according to the following parts by weight:

[0036]

[0037] 2) Add all the raw materials to the mixing equipment and mix them 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 accelerator and reinforcing agent is 15 parts of salt gypsum, 8 parts of silicon dioxide and 6 parts of sodium sulfate; curing agent is a mixture of 15 parts of melamine, 8 parts of talc and 7 parts of bentonite; dispersing agent is a mixture of 11 parts of sodium tripolyphosphate and 8 parts of sodium hexametaphosphate; said parts are parts by weight.

[0039] The particle size of talc 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 composite plugging agent, which is made of the following raw materials in parts by weight: 55-75 parts of composite gel material, 2-8 parts of toughening agent, and 3-9 parts of coagulation accelerator 12-22 parts of curing agent, 7-15 parts of dispersant. The composite plugging agent of the present invention has both rigidity and flexibility, can play the roles of deformation and filling, bridging and deformation filling at the same time, greatly reduces the amount of plugging materials and reduces the cost.

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 problem that plagues oil and gas drilling. Once lost circulation occurs, it will not only consume a large amount of drilling fluid materials and plugging materials, but also extend the engineering time, increase the original development, and even cause 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 are mainly composed of cotton fiber, peanut shell, walnut shell and other plant fibers; some are mainly composed of asphalt-limestone mixture, potassium humate, and granular substances. Ingredients: inorganic particulate plugging agent, as ...

Claims

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Application Information

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Patent Type & Authority Patents(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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