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Tackifier for oil-based drilling fluid and preparation method thereof

A technology of oil-based drilling fluid and viscosity raising agent, applied in chemical instruments and methods, drilling compositions, inorganic chemistry, etc., can solve the problem of increasing organic soil, oil-based drilling fluid fluid loss control polymer and other materials Increased amount, water-based drilling fluid viscosifier is not suitable for oil-based drilling fluid, oil-based drilling fluid environmental protection needs to be improved, etc., to improve the colloidal stability of the dispersion system, strong chemical activity and physical adsorption performance, strong chemical activity and physical adsorption sexual effect

Active Publication Date: 2019-12-13
重庆威能钻井助剂有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the technical field of oil-based drilling fluid viscosifiers, the current research mainly has the following technical problems: First, water-based drilling fluid viscosifiers are not suitable for oil-based drilling fluids
The viscosification of oil-based drilling fluids is currently mainly achieved by the incidental viscosification of materials such as organic soil and oil-based drilling fluid fluid loss control polymers. There is a lack of effective oil-based drilling fluid viscosifiers, and sometimes it is not enough to meet the requirements. Drilling fluid viscosity and shear force will increase the amount of organic soil, oil-based drilling fluid fluid loss control polymer and other materials, resulting in an increase in the cost of oil-based drilling fluid preparation
Third, the environmental protection of oil-based drilling fluid needs to be improved

Method used

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  • Tackifier for oil-based drilling fluid and preparation method thereof
  • Tackifier for oil-based drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Preparation of modified organic soil

[0028] The organic clay used in the present invention may be bentonite, montmorillonite, attapulgite, etc. Among them, bentonite has good swelling, adsorption, cation exchange and large internal and external specific surface area, and can carry out interlayer compounding or insertion reaction with many guest substances, so it is widely used in chemical industry, petroleum, food, transportation , Medicine, papermaking, energy, military, environmental protection and other industries are called "universal materials". The activation modification method is to activate the bentonite. The commonly used methods include acidification, roasting, salt activation, microwave activation, reduction, and oxidation. In the present invention, the acidification method is adopted to modify the bentonite, and at the same time, the dispersibility of the modified bentonite can be improved, which specifically includes the following steps:

[0029]...

Embodiment 2

[0032] Example 2: Preparation of modified vegetable gum

[0033] Guar gum (GUM) comes from the endosperm of the herb guar. It is a natural green product with special physical and chemical properties. It can be used as a thickener, stabilizer, emulsifier, dispersing and suspending agent, water-retaining agent and Gel agent, its application involves oil field, papermaking, medicine, daily necessities, food, textile, water treatment, mining explosives and other fields. Guar gum is a linear galactomannan, which is a non-ionic polymer. Although guar gum has good water solubility and thickening properties, the raw powder still has the following shortcomings: it cannot quickly swell and hydrate, the dissolution rate is slow, and the content of water-insoluble matter is high. These shortcomings greatly limit the application of guar gum, so it needs to be chemically modified. In the present invention, the hydroxypropyl modification method is used to modify the guar gum, specifically:

[...

Embodiment 3

[0037] Example 3: Preparation of viscosity-lifting agent for oil-based drilling fluid

[0038] 1. Raw material preparation

[0039] Modified organic clay: activated modified bentonite, montmorillonite, attapulgite, etc. can be used. In the present invention, bentonite modified by acidification and improved dispersion is preferred (Example 1);

[0040] Modified vegetable gum: hydroxypropyl guar gum prepared in preferred embodiment 2 of the present invention;

[0041] Thermoplastic elastic resin: can be from polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), polyamide (PA), polyoxymethylene (POM), polycarbonate (PC) , Polyphenylene ether, polysulfone, rubber, etc.;

[0042] acrylic acid;

[0043] Hydroxymethyl cellulose;

[0044] Quaternary ammonium salt: The quaternary ammonium salt in the present invention is preferably methacryloxyethyl trimethylammonium chloride.

[0045] Emulsifier: The emulsifier in the present invention is preferably a water-in-oil W / O...

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Abstract

The invention discloses a tackifier for an oil-based drilling fluid and a preparation method of the tackifier. The tackifier comprises the following components in parts by mass: 2-5 parts of modifiedorganic soil, 2-4 parts of modified vegetable gum, 1-3 parts of thermoplastic elastic resin, 5-10 parts of acrylic acid, 3-5 parts of hydroxymethyl cellulose, 1-3 parts of a quaternary ammonium salt,0.5-1.5 parts of an emulsifier, 3-6 parts of base oil and 0.05-0.15 part of an initiator, wherein the modified organic soil is preferably activated and modified bentonite, the modified vegetable gum is preferably hydroxypropyl guar gum, and the initiator is a mixture of ammonium sulfate and sodium sulfite in a mass ratio of 1: (2-4). The tackifier for the oil-based drilling fluid can overcome thedefect that a water-based drilling fluid tackifier is not applicable to the oil-based drilling fluid, is beneficial for reducing the preparation cost of an oil-based drilling fluid system and improving the overall environmental protection performance of the oil-based drilling fluid, and plays an important role in improving the performance of the oil-based drilling fluid and application of the oil-based drilling fluid.

Description

Technical field [0001] The invention belongs to the technical field of drilling aids, and specifically relates to a viscosity-lifting agent for oil-based drilling fluids and a preparation method thereof. Background technique [0002] Oil-based drilling fluid is a drilling fluid that uses oil as the continuous phase. It is divided into two types: water-in-oil oil-based drilling fluid and all-oil-based drilling fluid. It is mainly composed of base oil, organic soil, emulsifier, and wetting It is composed of additives, tackifiers and weighting agents. Oil-based drilling fluid has good inhibition, temperature resistance and stability, and can better meet the needs of complex formation drilling, coring operations, underbalanced drilling, large-length horizontal wells and other special situations, and can be a safe and efficient oil and gas field. Development provides reliable technical support. [0003] Oil-based drilling fluid viscosity enhancer is an important component of oil-based...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/32C01B33/40
CPCC01B33/40C09K8/32
Inventor 钱帆陈智万伟袁翊罗宇峰胡宗建李万强吴义张斌
Owner 重庆威能钻井助剂有限公司
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