Water-based drilling fluid lubricant composition and preparation method thereof

A lubricant composition, water-based drilling fluid technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problem of easy desorption, scratching, accelerated wear and corrosion, and adsorption of lubricating film layers on metal surfaces It can reduce the probability of differential pressure sticking, increase the adsorption, and enhance the strength of the filter cake.

Inactive Publication Date: 2014-10-22
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lubricating film layer formed in the prior art is not firmly adsorbed on the metal surface, and it is easy to desorb, scratch, and even accelerate wear and corrosion

Method used

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  • Water-based drilling fluid lubricant composition and preparation method thereof
  • Water-based drilling fluid lubricant composition and preparation method thereof
  • Water-based drilling fluid lubricant composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The water-based drilling fluid lubricant composition of the present invention is a stable emulsion system, the appearance is a milky white emulsion, the particle diameter is small, and the average particle diameter is between 10-70nm. The parts by mass of each component are as follows:

[0025]

[0026] The described water-based drilling fluid lubricant composition is prepared according to the following steps: first, the styrene monomer is sequentially rinsed with 8% NaOH solution and distilled water, and after being neutralized by pH test paper, the obtained product is dried with anhydrous sodium sulfate The purified product is then distilled under reduced pressure to obtain styrene monomer suitable for polymerization purity; secondly, the extracted mass parts are 10.0 to 50.0 parts of styrene monomer and 50.0 to 250.0 parts of deionized water, and are mixed with the initiator at room temperature The emulsifier is 0-10.0 parts of sodium dodecylbenzenesulfonate, and ...

Embodiment 2-6

[0028] The rheological property experiment of the prepared water-based drilling fluid lubricant composition according to embodiment 1 is as follows:

[0029] Preparation of the base slurry: add 5g of Na-montmorillonite to 100mL of water, stir at a high speed of 5300rpm on a high-speed mixer for 20min, and then airtightly age at room temperature for 24h to obtain a Na-montmorillonite base slurry with a soil content of 5%. .

[0030] Rheological properties test:

[0031] Add the pre-prepared water-based drilling fluid lubricant composition according to the mass fraction of 0, 0.2%, 0.5%, 0.8%, and 1.2% into the prepared drilling fluid base slurry, stir at high speed with a high-speed mixer for 5 minutes, and then pour In the measuring cup of the six-speed viscometer, make the liquid level equal to the scale line of the outer cylinder of the viscometer. Set the speed of the viscometer at 600, 300, 200, 100, 6 and 3rpm respectively, and wait for the dial to stabilize, then read ...

Embodiment 7-10

[0038] Preparation method is with embodiment 1, and difference is:

[0039] The prepared water-based drilling fluid lubricant composition selects octadecyltrimethylammonium bromide as an emulsifier, and the pre-prepared water-based drilling fluid lubricant composition is 0.2%, 0.5%, 0.8% according to the mass fraction , 1.2% was added in the prepared drilling fluid base slurry, and the rheological performance experiment of the prepared water-based drilling fluid lubricant composition was carried out in the same manner as in Examples 2-6, and the results are shown in Table 1.

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Abstract

The invention discloses a water-based drilling fluid lubricant composition and a preparation method thereof. The lubricant composition is composed of the following components in parts by weight: 10.0 to 50.0 parts of styrene monomer, 0 to 10.0 parts of initiator, 0 to 20.0 parts of emulsifier, 0 to 5.0 parts of crosslinking agent, 50.0 to 250.0 parts of water, and 80.0 to 99.0 parts of base oil. The preparation method comprises the following steps: sequentially mixing styrene monomers, an initiator, an emulsifier, a crosslinking agent, and water according to the formula mentioned above so as to form a reaction solution, placing the reaction solution in a chamber with a proper temperature for a proper period of time to carry out emulsion polymerization so as to obtain a milk-white emulsion composition, and adding the composition into industrial base oil so as to obtain the lubricant composition; wherein the average particle size of the emulsion composition is 10 to 70 nm. The lubricant composition has the characteristics of small particle size, easiness in dispersing in drilling fluid, good compatibility, low water loss rate, and good lubricating effect.

Description

technical field [0001] The invention relates to a drilling fluid lubricant composition and a preparation method thereof, in particular to a lubricant composition for water-based drilling fluid and a preparation method thereof. Background technique [0002] With the development of the international oil and gas industry and the increase in the global demand for oil and gas energy, the depth of drilling and exploitation of oil and gas wells and the complexity of underground formations have increased accordingly. In the drilling and exploitation of these complex oil and gas formations, the contact pressure, friction and friction between the drilling tools and tools used and the underground rock surface are greatly increased, resulting in excessive torque, fracture, Accidents such as pipe sticking occur frequently, and even lead to wellbore scrapping and engineering accidents in severe cases, resulting in huge economic losses and potential safety hazards. This is a long-standing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03
CPCC09K8/035C09K2208/34
Inventor 柯扬船杨丽燕
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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