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Preparation method of drilling fluid tackifier

A technology of viscosifier and drilling fluid, which is applied in the field of preparation of drilling fluid viscosifier, which can solve the problems of disappearance and rapid decline of viscosifying effect of viscosifier, and achieve the effect of good temperature resistance

Inactive Publication Date: 2019-12-31
淮安正天新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing drilling fluid viscosifiers, such as 80A-51, cannot well meet the needs of high-temperature construction. Most of the viscosifiers decrease rapidly or even disappear completely when the temperature is higher than 150°C.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A preparation method of drilling fluid viscosifier, comprising the following steps:

[0019] Step 1, stirring and mixing 10 parts of polyisobutylene, 3 parts of hypromellose, 5 parts of dioctyl phthalate, 4 parts of ethyl cyanoacrylate and 3 parts of polyacrylate in parts by weight, The stirring speed of stirring and mixing is 160 rpm, and the stirring time is 40 minutes to obtain mixture 1;

[0020] Step 2, add 2 parts of methanesulfonic acid, 1 part of polyethylene glycol 200, 2 parts of polyvinyl acetate and 1 part of dimethyl diallyl ammonium chloride in the mixture, and the vacuum degree is 0.01MPa heated to 70°C under the same conditions and stirred for 20 minutes to obtain mixture 2;

[0021] Step 3: Add 1 part of talcum powder and 1 part of dicyclohexylamine to mixture 2, stir and mix at a stirring speed of 100 rpm for 20 minutes to obtain a drilling fluid viscosity enhancer.

Embodiment 2

[0023] A preparation method of drilling fluid viscosifier, comprising the following steps:

[0024] Step 1, stirring and mixing 12 parts of polyisobutylene, 5 parts of hypromellose, 6 parts of dioctyl phthalate, 5 parts of ethyl cyanoacrylate and 4 parts of polyacrylate in parts by weight, The stirring speed of stirring and mixing is 168 rpm, and the stirring time is 45 minutes to obtain mixture 1;

[0025] Step 2, add 3 parts of methanesulfonic acid, 2 parts of polyethylene glycol 200, 2 parts of polyvinyl acetate and 2 parts of dimethyl diallyl ammonium chloride in the mixture, in the vacuum degree of vacuum is 0.02MPa Heated to 73°C under the same conditions and stirred for 25 minutes to obtain mixture 2;

[0026] Step 3: Add 1 part of talcum powder and 2 parts of dicyclohexylamine to mixture 2, stir and mix at a stirring speed of 105 rpm for 26 minutes to obtain a drilling fluid viscosity enhancer.

Embodiment 3

[0028] A preparation method of drilling fluid viscosifier, comprising the following steps:

[0029] Step 1, stirring and mixing 14 parts of polyisobutylene, 7 parts of hypromellose, 8 parts of dioctyl phthalate, 6 parts of ethyl 2-cyanoacrylate and 7 parts of polyacrylate in parts by weight, The stirring speed of stirring and mixing was 170 rpm, and the stirring time was 46 minutes to obtain mixture 1;

[0030] Step 2, add 4 parts of methanesulfonic acid, 3 parts of polyethylene glycol 200, 3 parts of polyvinyl acetate and 2 parts of dimethyl diallyl ammonium chloride in the mixture, in the vacuum degree of vacuum is 0.03MPa heated to 78°C under the same conditions and stirred for 26 minutes to obtain mixture 2;

[0031] Step 3: Add 2 parts of talcum powder and 3 parts of dicyclohexylamine to mixture 2, stir and mix at a stirring speed of 110 rpm for 28 minutes to obtain a drilling fluid viscosity enhancer.

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PUM

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Abstract

The invention discloses a preparation method of a drilling fluid tackifier. The method comprises the following steps: stirring and mixing polyisobutene, hydroxypropyl methylcellulose, dioctyl phthalate, ethyl 2-cyanoacrylate and polyacrylate to obtain a first mixture; adding methanesulfonic acid, polyethylene glycol, polyvinyl acetate and dimethyldiallylammonium chloride into the first mixture, and performing heating and stirring under a vacuum condition to obtain a second mixture; and adding a lubricant and dicyclohexylamine into the second mixture, and performing stirring and mixing to obtain the drilling fluid tackifier. The tackifier prepared by the method has a good tackifying stability and a good temperature resistance.

Description

technical field [0001] The invention belongs to the field of viscosifier preparation and in particular relates to a preparation method of a drilling fluid viscosifier. Background technique [0002] With the continuous expansion of demand for oil and natural gas, oil and gas exploitation has gradually entered the development stage of complex geological conditions such as deep wells and ultra-deep wells. The higher and higher bottom-hole construction temperature and circulation temperature put forward the actual demand of high temperature resistance for related additives in the petroleum industry. Drilling fluid is the first fluid that comes into contact with oil and gas reservoirs. Its performance plays a vital role in ensuring wellbore stability and improving well completion quality. Therefore, improving the high temperature resistance of drilling fluid is an urgent problem to be solved at present. . [0003] In the prior art, the high temperature resistance of drilling fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03
CPCC09K8/03
Inventor 李铜玲
Owner 淮安正天新材料科技有限公司
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