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Tackifier for drilling fluid, and drilling fluid

A technology of drilling fluid and viscosifier, which is applied in the direction of drilling composition, chemical instruments and methods, etc., which can solve the problems of large dosage and performance to be further improved, so as to increase viscosity, improve filter cake quality and strengthen structure force effect

Inactive Publication Date: 2020-02-04
中石化石油工程技术服务有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned drilling fluid viscosifiers mainly have large dosage and performance needs to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A viscosifier for drilling fluid, comprising the following components by weight:

[0042] 80 parts by weight of sticky agent;

[0043] 20 parts by weight of dispersant;

[0044] Wherein, the viscosity raising agent is modified graphene oxide; the dispersant is sodium oleate.

Embodiment 2

[0046] A viscosifier for drilling fluid, comprising the following components by weight:

[0047] 90 parts by weight of sticky agent;

[0048] 10 parts by weight of dispersant;

[0049] Wherein, the viscosity raising agent is graphene oxide; the dispersant is sodium dodecylbenzenesulfonate.

Embodiment 3

[0051] In a kind of drilling fluid that contains the viscosifier for drilling fluid of embodiment 1 or 2, comprise the component of following parts by weight:

[0052] 70 parts by weight of biodiesel;

[0053] 3 parts by weight of organic montmorillonite;

[0054] 20 parts by weight of calcium chloride brine;

[0055] Span-80, 1 part by weight;

[0056] 1 part by weight of sulfonated pitch;

[0057] 0.5 parts by weight of dodecyltrimethylammonium bromide;

[0058] 0.05 parts by weight of viscosifier for drilling fluid.

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Abstract

The invention provides a tackifier for a drilling fluid. The tackifier is composed of a viscosity increasing agent and a dispersant, wherein the viscosity increasing agent is one or more of graphene-based substances, gum polymers, and nanoparticles; and the dispersant is one or more of coco glucoside, lauryl glucoside, sodium dodecylbenzenesulfonate, and sodium oleate. At the same time, the invention also provides the drilling fluid, and the drilling fluid comprises the following components in parts by weight: 64-70 parts of base oil; 1-3 parts of organic soil; 16-20 parts of calcium chloridebrine; 1-3 parts of an emulsifier; 1-3 parts of a filtrate reducer; 0.5-1.5 parts of a wetting agent; and 0.02-1.5 parts of the tackifier for the drilling fluid. Under the condition of a relatively small addition amount of the tackifier, a viscosity of the drilling fluid can be greatly increased, and the structural force of the drilling fluid is enhanced. At the same time, the drilling fluid in which the tackifier for the drilling fluid is added can improve the quality of a filter cake, a filtration loss amount of the drilling fluid is reduced, and the stability of a well wall is improved.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling chemical materials, in particular to a viscosifier for drilling fluid and drilling fluid. Background technique [0002] During the drilling process, in order to ensure that the drilling fluid has a high viscosity and good rheology under low solid phase, it is usually necessary to add a viscosifier to increase the viscosity of the drilling fluid. Drilling fluid viscosifiers are usually water-soluble polymers with very long molecular chains. The mechanism of viscosification: first, the network structure formed by the bridging of polymers can enhance the structural viscosity of drilling fluid; second, free polymer molecules Can increase the viscosity of the aqueous phase. Drilling fluid viscosifiers can not only play the role of viscosification, but also often serve as shale inhibitors (coating agents), fluid loss reducers and flow pattern improvers. Therefore, the use of viscosifiers is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/36C09K8/03
CPCC09K8/03C09K8/36
Inventor 张敬辉刘振东李公让周守菊明玉广李卉
Owner 中石化石油工程技术服务有限公司
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