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Asphalt resin anti-sloughing agent for drilling fluid, and preparation method of asphalt resin anti-sloughing agent

A technology of asphalt resin and anti-slump agent, which is applied in the field of asphalt resin anti-slump agent for drilling fluid and its preparation, can solve problems such as easy well collapse, increase well wall stability, enhance flexibility and heat resistance, good flexibility

Active Publication Date: 2020-06-19
北京宏勤石油助剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although the sulfonation of bitumen has been widely used in various oil fields, it will form a thin and tough mud cake in the drilling fluid. As the drilling depth increases, the pressure and temperature of the bottom layer will also increase. Under the condition of high temperature and high pressure, due to rheological characteristics, sulfonated asphalt will produce certain plastic flow deformation under load, which will easily cause well collapse

Method used

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  • Asphalt resin anti-sloughing agent for drilling fluid, and preparation method of asphalt resin anti-sloughing agent
  • Asphalt resin anti-sloughing agent for drilling fluid, and preparation method of asphalt resin anti-sloughing agent
  • Asphalt resin anti-sloughing agent for drilling fluid, and preparation method of asphalt resin anti-sloughing agent

Examples

Experimental program
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Effect test

preparation example 1-3

[0038] In Preparation Example 1-3, the chlorinated palm oil methyl ester is selected from the model RY-118 chlorinated palm oil methyl ester sold by Dongguan Ruiyun Environmental Protection Technology Co., Ltd., and the precipitated silica is selected from Shijiazhuang Datai Chemical Technology Co., Ltd. Precipitated silica for sale with type A130

preparation example 1

[0039] Preparation example 1: (1) Disperse 2kg of graphite oxide in 40kg of water, and disperse for 1h under 400w ultrasonic conditions to obtain an aqueous solution of graphene oxide; mix 8kg of sodium hydroxide, 3kg of urea and 80kg of water to prepare a solution, and prepare a solution at -10 Freeze at ℃ for 8 hours, add 5kg of starch, stir at 0℃ for 4 hours, slowly warm up to room temperature, add 3kg of chloropalm oil methyl ester and 2kg of precipitated silica, and mix well to obtain a starch solution, the particle size of precipitated silica 400 mesh;

[0040] (2) Mix the starch solution and the graphene oxide solution at a mass ratio of 10:2.5, sonicate for 30 minutes, filter with a polytetrafluoroethylene membrane, wash with deionized water until neutral, vacuum-dry at 60°C, and grind for 200 Mesh sieve.

preparation example 2

[0041] Preparation example 2: (1) Disperse 3kg of graphite oxide in 60kg of water, and disperse it under 450w ultrasonic conditions for 0.8h to obtain an aqueous solution of graphene oxide; mix 10kg of sodium hydroxide, 5kg of urea and 83kg of water to prepare a solution, and put it in - Freeze at 10°C for 9 hours, add 8kg of starch, stir at 0°C for 5h, slowly warm up to room temperature, add 4kg of chlorinated palm oil methyl ester and 4g of precipitated silica, and mix well to obtain a starch solution and precipitated silica particles The diameter is 400 mesh;

[0042] (2) Mix the starch solution and the graphene oxide solution at a mass ratio of 10:2.7, sonicate for 40 minutes, filter with a polytetrafluoroethylene membrane, wash with deionized water until neutral, dry in vacuum at 70°C, and grind for 200 Mesh sieve.

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Abstract

The invention discloses an asphalt resin anti-sloughing agent for a drilling fluid, and a preparation method of the asphalt resin anti-sloughing agent. The asphalt resin anti-sloughing agent for the drilling fluid comprises the following components in parts by weight: 40-60 parts of sulfonated asphalt, 10-20 parts of castor oil triglycidyl ether, 15-30 parts of a filtrate reducer, 5-15 parts of aseparant, 15-25 parts of a modifier, 3-7 parts of a compatibilizer, 1-3 parts of 1,4-butanediol, 1-3 parts of a coupling agent and 0.5-1.5 parts of an organic tin catalyst, wherein the modifier comprises trifunctional polyurethane acrylate, a urea formaldehyde resin and a trifunctional epoxy resin in a mass ratio of 1:(0.3-0.5):(0.5-0.7). The asphalt resin anti-sloughing agent for the drilling fluid has the advantages of high-temperature resistance, high-pressure resistance, high rigidity, good adsorbability, strong stabilizing effect on a well wall, salt resistance and calcium resistance.

Description

technical field [0001] The invention relates to the technical field of additives for drilling fluids, in particular to an asphalt resin anti-slump agent for drilling fluids and a preparation method thereof. Background technique [0002] Borehole wall instability is one of the three major technical problems that restrict the smooth progress of drilling projects. It is related to safety, cost and time issues. The main reason is the mechanical instability and hydration expansion of the formation. The anti-slump agent for drilling fluid, also known as shale inhibitor, can effectively inhibit the hydration expansion and dispersion of shale, fill the cracks in the borehole wall, and stabilize the borehole wall. [0003] At present, asphalt materials have always occupied a dominant position in anti-slump agents, but asphalt products will have bonding problems under certain temperature and pressure, resulting in restrictions on transportation, processing and use. Therefore, experts ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C09K8/56
CPCC09K8/035C09K8/56
Inventor 卢新玉曹红巧曹何山卢长征沈勤长
Owner 北京宏勤石油助剂有限公司
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