Lifted cutting agent and preparation method and oil-based drilling fluid

A technology of shear lifting agent and hydroxyl group, applied in the field of shear lifting agent and its preparation, oil-based drilling fluid, can solve the problems of limiting the wide application of shear lifting agent, low shear lifting force of shear lifting agent, etc., and achieve dynamic carrying and static suspension ability. Strong, high cutting force, improve the effect of cutting force

Active Publication Date: 2018-03-16
中石化石油工程技术服务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The prior art discloses a variety of cutting agents, but the cutting force of these cutting agents is low, which limits the wide application of cutting agents

Method used

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  • Lifted cutting agent and preparation method and oil-based drilling fluid
  • Lifted cutting agent and preparation method and oil-based drilling fluid
  • Lifted cutting agent and preparation method and oil-based drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The invention provides a preparation method of a cutting agent, comprising:

[0025] The styrene vinyl carboxylic acid copolymer, diamine and hydroxyl-containing fatty acid are reacted to obtain the cutting agent.

[0026] In the present invention, the reaction temperature is preferably 150-180°C, more preferably 160-170°C. In the present invention, the reaction time is preferably 6-10 hours, more preferably 8 hours.

[0027] In the present invention, the preparation method of the cutting agent is preferably:

[0028] Reacting styrene vinyl carboxylic acid copolymer with diamine; reacting the obtained reaction product with hydroxyl-containing fatty acid to obtain the cutting agent.

[0029] In the present invention, the reaction temperature of the styrene vinyl carboxylic acid copolymer and diamine is preferably 150-180°C, more preferably 160-170°C. In the present invention, the reaction time between the styrene vinyl carboxylic acid copolymer and the diamine is pref...

Embodiment 1

[0045] Copolymerize 1.0 mol of styrene acrylic acid copolymer and 1.0 mol of hexamethylenediamine at 150°C for 3 hours, then add 1.0 mol of hydroxyl-containing dodecanoic acid for 3 hours at 150°C, after natural cooling Obtain viscous cutting agent.

[0046] The styrene acrylic acid copolymer is the 303 type product provided by Shanghai Xianglan Chemical Co., Ltd.; the source of the hydroxyl-containing dodecanoic acid is the 2-hydroxydodecanoic acid product provided by Hubei Jusheng Technology Co., Ltd.

[0047] Carry out infrared spectrum detection to the cutting agent prepared in Example 1 of the present invention, and the detection result is as follows: figure 1 shown by figure 1 It can be seen that the cutting agent prepared in Example 1 of the present invention has the structure of formula 1:

[0048]

[0049] According to the method described in the above technical solution, the cutting effect of adding the cutting agent prepared in Example 1 of the present inventio...

Embodiment 2

[0061] Copolymerize 1.0 mol of styrene-itaconic acid copolymer and 1.0 mol of decanediamine at 160°C for 4 hours, then add 1.0 mol of hydroxyl-containing tetradecanoic acid, and conduct copolymerization at 160°C for 4 hours, naturally After cooling, viscous cutting agent is obtained.

[0062] The source of the styrene-itaconic acid copolymer is the product provided by the Pudong Branch of Shanghai Highland Barley Industry Co., Ltd.; the 3-hydroxy myristic acid product provided by the source of the hydroxyl-containing myristic acid Guangxi Jinle Chemical Co., Ltd. .

[0063] Infrared spectrum detection was carried out on the cutting agent prepared in Example 2 of the present invention, and the detection result showed that the cutting agent prepared in Example 1 of the present invention had the structure of formula 2:

[0064]

[0065] According to the method described in the above technical solution, the cutting effect of adding the cutting agent prepared in Example 2 of th...

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Abstract

The invention provides a preparation method of a lifted cutting agent. The preparation method comprises the following steps: a styrene vinyl carboxylic acid copolymer, diamine and hydroxyl aliphatic acid are subjected to a reaction to obtain the lifted cutting agent. The lifted cutting agent takes the styrene vinyl carboxylic acid copolymer, diamine and hydroxyl aliphatic acid as raw materials, the lifted cutting agent has an alternative structure, can increase the structural force of drilling fluid, and has higher lifted cutting rate, the oil-based drilling fluid using the lifted cutting agent has high lifted cutting force and strong dynamic carrying and static suspension capability, and requirement of on-site construction can be better satisfied. The lifted cutting agent prepared by theabove technical scheme has a structure shown in a formula I. The invention also provides the oil-based drilling fluid of the lifted cutting agent.

Description

technical field [0001] The invention relates to the technical field of drilling fluids, in particular to a cutting agent, a preparation method thereof and an oil-based drilling fluid. Background technique [0002] Compared with water-based drilling fluid, oil-based drilling fluid has incomparable advantages over water-based drilling fluid, which has been verified in the development of shale gas horizontal wells. The properties of oil-based drilling fluids widely used at present basically meet the requirements of drilling engineering and geological logging for drilling fluids, but for extended-reach wells, the wellbore cleaning ability is not enough, which is specifically manifested in the low static shear force of drilling fluids, generally only 2 ~4Pa, resulting in poor suspending ability of the drilling fluid at the bottom of the well, which affects the dynamic sand-carrying and static debris-carrying ability of the drilling fluid to a certain extent. In the field applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/00C08F8/32C08F212/08C09K8/035C09K8/32
CPCC08F8/00C09K8/035C09K8/32C08F8/32C08F212/08
Inventor 刘明华胡小燕黄桂春张滨李文博彭波
Owner 中石化石油工程技术服务有限公司
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