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Dimer acid-organic amine copolymer, preparation method and application thereof, water-in-oil emulsified drilling fluid shear strength improving agent and drilling fluid

A technology of emulsified drilling fluid and dimer acid, applied in the preparation of organic compounds, the preparation of carboxylic acid amides, and organic chemistry, etc. problem, to achieve good fluidity and temperature resistance, easy to use

Active Publication Date: 2015-09-09
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these cutting agents all have their own deficiencies. The main performance is that organic small molecule cutting agents rely too much on the organic soil environment, cannot play a role in drilling fluids without organic soil, and will affect the stability of water-in-oil emulsions. At the same time, ketones and esters have side effects on the environment; rubber-based cutting agents are not shear-resistant, difficult to dissolve, and difficult to use on site; amphiphilic molecules have poor cutting effects, which will greatly increase the plastic intrinsic viscosity, which is not conducive to improving water-in-oil Dynamic plastic ratio of emulsified drilling fluid

Method used

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  • Dimer acid-organic amine copolymer, preparation method and application thereof, water-in-oil emulsified drilling fluid shear strength improving agent and drilling fluid
  • Dimer acid-organic amine copolymer, preparation method and application thereof, water-in-oil emulsified drilling fluid shear strength improving agent and drilling fluid

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preparation example Construction

[0021] The invention provides a method for preparing a dimer acid-organic amine copolymer, the method comprising copolymerizing dimer acid, alkylamine and aromatic amine, wherein the dimer acid is oleic acid and linoleic acid acid dimer, the alkylamine is one or more of C10-C20 alkyl primary amines, and the aromatic amine is single-point substituted by C1-C3 alkyl on the aniline and benzene ring or One or more of multi-point substituted anilines.

[0022] According to the present invention, the dimer acid is a dimer fatty acid containing 2 carboxylic acid groups, which is oleic acid (CH 3 (CH 2 ) 7 CH=CH(CH 2 ) 7 COOH)) and linoleic acid (CH 3 (CH 2 ) 4 CH=CHCH 2 CH=CH(CH 2 ) 7 COOH) dimer. Such dimer acid can be obtained by the conventional method of the present invention, for example, the method recorded in the document "Zhang Shulin. Synthesis and application of dimer acid, "Fine Petrochemical Industry", 1995", also can be a commercially available product (prefer...

Embodiment 1

[0051] This example is used to illustrate the dimer acid-organic amine copolymer of the present invention and its preparation method and application.

[0052] (1) Dimer acid (Shanghai Hersbit Chemical Co., Ltd. brand Pripol 1013, hereinafter the same) with a molar ratio of 1:0.5:0.5, dodecyl primary amine and aniline are added to the reaction vessel, at 120 ± 2 Stirring at ℃ for 30min to obtain a homogeneously mixed monomer mixture;

[0053] (2) Add concentrated sulfuric acid (concentration is 98% by weight, and the addition amount is 0.5% by weight of the amount of monomer mixture) dropwise in the above-mentioned monomer mixture (adding about 2min), under the configuration with condensing drainage device, at 160 After reacting at ±5°C for 2 hours, the resulting reaction product is a dimer acid-organic amine copolymer with a weight average molecular weight of 6500g / mol and an absolute viscosity of 125000cp.

[0054] Add diluent tall oil (purchased from Jinan Jinquan Chemical ...

Embodiment 2

[0056] This example is used to illustrate the dimer acid-organic amine copolymer of the present invention and its preparation method and application.

[0057] (1) Add dimer acid, dodecyl primary amine and aniline with a molar ratio of 1:0.4:0.6 into the reaction vessel, and stir at 120±2°C for 30 minutes to obtain a homogeneously mixed monomer mixture;

[0058] (2) Add concentrated sulfuric acid (concentration is 98% by weight, and the addition amount is 0.7% by weight of the amount of monomer mixture) dropwise in the above-mentioned monomer mixture (adding about 2min), under the configuration of condensing drainage device, at 170 After reacting for 4 hours at ±5°C, the resulting reaction product is a dimer acid-organic amine copolymer with a weight average molecular weight of 5300 g / mol and an absolute viscosity of 110000 cp.

[0059] Add diluent tall oil fatty acid (purchased from Shanghai Demao Chemical Co., Ltd. brand HARTALL FA-1, the same below) to the dimer acid-organic...

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Abstract

The invention relates to a dimer acid-organic amine copolymer which comprises a structural unit from dimer acid, a structural unit from alkylamine and a structural unit from aromatic amine, wherein the dimer acid is an oleic acid-linoleic acid dimer; the alkylamine is one or more of C10-C20 alkyl primary amines, and the aromatic amine is aniline and one or more of anilines of which the benzene ring is subjected to single-point substitution or multipoint substitution by C1-C3 alkyl. The invention also relates to a preparation method of the dimer acid-organic amine copolymer, application of the dimer acid-organic amine copolymer as a shear strength improving agent, a water-in-oil emulsified drilling fluid shear strength improving agent, and a drilling fluid containing the shear strength improving agent. The shear strength improving agent provided by the invention can obviously enhance the dynamic shear force, dynamic plastic ratio and static shear force of the water-in-oil emulsified drilling fluid under the condition of lower consumption, and can be used in the water-in-oil emulsified drilling fluid which contains or does not contain organic soil.

Description

technical field [0001] The invention relates to a dimer acid-organic amine copolymer and its preparation method and application, a water-in-oil emulsified drilling fluid cutting agent containing the dimer acid-organic amine copolymer, and a water-in-oil emulsified drilling fluid containing Water-in-oil emulsified drilling fluid as cutting agent. Background technique [0002] Water-in-oil emulsified drilling fluid has always had problems such as low dynamic shear force, low dynamic-plastic ratio, and poor suspension performance. suspended. In the actual drilling process, the low shear force will cause the solid phase settlement of the water-in-oil emulsified drilling fluid during the circulation process, reduce the drilling speed of the drill bit, increase the solid phase concentration of the drilling fluid at the bottom of the hole, and cause complex downhole drilling such as mud pack bit. the occurrence of the situation. Water-in-oil emulsion drilling fluids generally us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/36C07C233/09C07C231/02
CPCC09K8/36C07C231/02C07C233/09
Inventor 蒋官澄贺垠博黄贤斌邓正强
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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