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Drilling fluid additive, preparation method thereof and drilling fluid

A drilling fluid treatment agent and compound technology, which is applied in the field of drilling to achieve the effects of high yield, simple operation steps and mild reaction conditions

Active Publication Date: 2018-05-04
SINOPEC SSC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chitosan derivatives provided by the prior art are mainly used to treat drilling wastewater, but chitosan derivatives used in drilling fluid systems have not been reported yet

Method used

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  • Drilling fluid additive, preparation method thereof and drilling fluid
  • Drilling fluid additive, preparation method thereof and drilling fluid
  • Drilling fluid additive, preparation method thereof and drilling fluid

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preparation example Construction

[0039] The present invention provides a kind of preparation method of the drilling fluid treatment agent described in above-mentioned technical scheme, comprises the following steps:

[0040] (1) chitosan, basic compound and alcohol compound are reacted to obtain the first intermediate product; the basic compound is alkali metal carbonate or alkali metal hydroxide;

[0041] (2) reacting the first intermediate product with a chlorocarboxylic acid to obtain a second intermediate product; the number of carbon atoms of the chlorocarboxylic acid is 2 to 11;

[0042] (3) The second intermediate product is reacted with chlorinated monohydric alcohol compound, dibasic alcohol compound and chloroalkyl epoxide to obtain the third intermediate product; the number of carbon atoms of the chlorinated monohydric alcohol compound is 2 to 11; the number of carbon atoms of the dihydric alcohol compound is 2 to 17; the number of carbon atoms of the chloroalkyl epoxide is 3 to 12;

[0043] (4) r...

Embodiment 1

[0089] 16 parts by weight of chitosan (number average molecular weight is 200000), 150 parts of water, 20 parts of sodium hydroxide and 40 parts of methanol are stirred and mixed evenly, and carried out alkalization and gelatinization reaction for 0.5 hour at 50 ° C to obtain The first intermediate product; the first intermediate product and 24 parts of chloroacetic acid were stirred and reacted at 55°C for 2 hours to obtain the second intermediate product; 10 parts of chloroethanol, 10 parts of ethylene glycol and 6 parts were added to the second intermediate product Parts of epichlorohydrin were reacted at 95°C for 2 hours to obtain a third intermediate product; 8 parts of ethylenediamine were added to the third intermediate product, stirred and mixed evenly, and the temperature was raised to 60°C for 0.5 hours to obtain a dark red viscous It is a gel-like transparent solid, and the drilling fluid treatment agent can be obtained after drying and removing water, and the produc...

Embodiment 2

[0092] 17 parts by weight of chitosan (the number average molecular weight is 300000), 160 parts of water, 25 parts of sodium carbonate and 45 parts of ethanol are stirred and mixed uniformly, and carried out alkalization and gelatinization reaction for 1 hour at 55 ° C to obtain the first An intermediate product; the first intermediate product was stirred and reacted with 30 parts of chloropropionic acid at 65°C for 2.5 hours to obtain the second intermediate product; 11 parts of chloropropanol, 11 parts of polyethylene glycol were added to the second intermediate product Alcohol 400 and 7 parts of 1,2-epoxychlorobutane were reacted at 110°C for 3 hours to obtain the third intermediate product; 9 parts of diethylenetriamine were added to the third intermediate product, stirred and mixed evenly, and the temperature was raised to After reacting at 70°C for 1 hour, a dark red viscous gelatinous transparent solid was obtained. After drying and removing water, the drilling fluid tr...

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Abstract

The invention provides a drilling fluid additive. The drilling fluid additive comprises a structure shown as formula I, wherein in the formula I, a is 1200-3100, q is 1-10, p is 2-10, m is 1-16, n is1-5, o is 0-4, and M is an alkali metal element. The invention further provides a preparation method of the drilling fluid additive in the technical scheme. The preparation method comprises the following steps: (1) preparing a first intermediate product from chitosan, an alkali compound and an alcohol compound through a reaction; (2) preparing a second intermediate product from the first intermediate product and chlorocarboxylic acid through a reaction; (3) preparing a third intermediate product from the second intermediate product, a chloro monobasic alcohol compound, a chloro dibasic alcoholcompound and a chloroalkyl epoxide through a reaction; (4) preparing the drilling fluid additive from the third intermediate product and organic amine through a reaction. The drilling fluid additivehas good inhibition performance, shearing increasing performance and filter loss reducing performance.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to a drilling fluid treatment agent, a preparation method thereof and drilling fluid. Background technique [0002] Chitosan is a derivative produced after deacetylation of chitin. It is an alkaline polysaccharide containing amino groups. It is non-toxic, has good biocompatibility and biodegradability, and has been favored by researchers in different fields. extensive attention. Studies have shown that chitosan molecular chains contain a large number of active groups such as hydroxyl groups and amine groups. The existence of these active groups makes it easy to undergo derivatization and modification. Therefore, the biological function of chitosan and its derivatives Materials get attention. At present, the research on the modification of chitosan mainly focuses on introducing hydrophilic groups into chitosan molecules to increase its solubility. The 2-position amine group and 6-...

Claims

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Application Information

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IPC IPC(8): C08B37/08C08G65/26C08G65/28C09K8/035C09K8/20
CPCC08B37/003C08G65/2621C08G65/263C09K8/035C09K8/206
Inventor 司西强王中华樊好福雷祖猛吕跃滨谢俊
Owner SINOPEC SSC
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