Method for preparing modified sulfomethal phenolaldehy resin for drilling liquid

A technology of sulfonated phenolic resin and drilling fluid, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as poor salt resistance, achieve good salt resistance, increase adsorption capacity, and inhibit formation expansion. Effect

Active Publication Date: 2011-11-16
河南金马石油科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the above-mentioned modified phenolic resin is used as a fluid loss reducer for drilling fluid, its temperature resistance is better, but its salt resistance is still poor

Method used

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  • Method for preparing modified sulfomethal phenolaldehy resin for drilling liquid

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[0025] The invention provides a method for preparing a modified sulfonated phenolic resin for drilling fluid, comprising the following steps:

[0026] a) mixing sodium hydroxide solution, molten phenol, epichlorohydrin and trimethylamine, and reacting to obtain a cationic intermediate;

[0027] b) mixing the cationic intermediate with the sulfonated phenolic resin, and reacting to obtain the modified sulfonated phenolic resin for drilling fluid.

[0028] The present invention uses sodium hydroxide solution, molten phenol, epichlorohydrin and trimethylamine as raw materials to prepare a quaternary ammonium salt cationic intermediate, and then uses the quaternary ammonium salt cationic intermediate as a modifier to modify the sulfonated phenolic resin, A modified sulfonated phenolic resin for drilling fluid is obtained.

[0029] The present invention first uses sodium hydroxide solution, molten phenol, epichlorohydrin and trimethylamine as raw materials to synthesize cationic i...

Embodiment 1

[0051] Adding 30kg of mass concentration to the reactor is 30% sodium hydroxide solution, then slowly adding 63kg of molten phenol, and reacting for 0.5h; continue to slowly add 62kg of epichlorohydrin to the reactor, and the temperature of the reactor during the addition process is not constant. If the temperature exceeds 40°C, after adding the epichlorohydrin, raise the temperature to 60°C and react for 1 hour; cool down to 45°C, and slowly add 120kg of trimethylamine into the reaction kettle. After completion, react at 60°C for 30 minutes to obtain a cationic intermediate;

[0052] Add 175kg of formaldehyde and 30kg of water into the reactor, then add 100kg of molten phenol, and stir evenly; slowly add 38kg of sodium pyrosulfite solid to the reactor, and react for 15 minutes after sodium pyrosulfite dissolves; slowly add 63kg of sodium pyrosulfite into the reactor Sodium sulfate water, stirred and reacted at 60°C for 30min; then heated to 100°C for 3h, added 60kg of the cat...

Embodiment 2

[0054] Add 60g sodium bentonite and 5.0g anhydrous sodium carbonate in 1000mL water and be mixed with base slurry, add the modified sulfonated phenolic resin of 50g embodiment 1 preparation, 50g sulfonated lignite (SMC) and 150gNaCl in described base slurry, obtain Drilling fluid, according to the method specified in "SY / T5094-2008 Drilling Fluid Sulfomethyl Phenolic Resin", the performance test of the drilling fluid is carried out, the results are shown in Table 1, and Table 1 is the drilling provided by the embodiments of the present invention and comparative examples Liquid performance test results.

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Abstract

The invention provides a method for preparing modified sulfomethal phenolaldehy resin for drilling liquid, comprising the following steps of: a) mixing a sodium hydroxide solution, molten phenol, epoxy chloropropane and trimethyl amine, and reacting to obtain a cationic intermediate; and b) mixing the cationic intermediate with sulfomethal phenolaldehy resin, and reacting to obtain the modified sulfomethal phenolaldehy resin for the drilling liquid. In the modified sulfomethal phenolaldehy resin for the drilling liquid, provided by the invention, a quaternary ammonium salt cationic group is added and is capable of improving the adsorption capacity of the sulfomethal phenolaldehy resin and clay, thus, the adsorption amount of the resin on the clay is increased greatly so that the sulfomethal phenolaldehy resin has a better filtration loss reduction effect and better salt resistance. Results from embodiments of the invention indicate that the drilling liquid consisting of basic slurry, 5% of the modified sulfomethal phenolaldehy resin prepared according to the method provided by the invention, 5% of sulfonated lignite and 35% of NaCl has the high-temperature / pressure filtration loss of 31.8mL.

Description

technical field [0001] The invention belongs to the technical field of sulfonated phenolic resins, and in particular relates to a preparation method of a modified sulfonated phenolic resin for drilling fluid. Background technique [0002] In oil drilling, drilling fluid fluid loss reducer is the most used type of drilling fluid treatment agent, which can maintain the stability of drilling fluid performance and realize safe and efficient drilling. The prior art discloses a variety of fluid loss additives for drilling fluids, such as natural materials such as cellulose, starch, humic acid, and xanthan gum, and their modified products, or synthetic resins such as phenolic resins, or copolymers of acrylic acid and acrylamide. Among them, synthetic resin drilling fluid fluid loss additives have been extensively researched and applied due to their advantages of good heat resistance, stability, and fluid loss control. [0003] Sulfonated phenolic resin (SMP) is the most commonly u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/28C09K8/24
Inventor 马礼俊姚杰关红伟赵善波王忠交
Owner 河南金马石油科技有限责任公司
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