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Flow pattern regulator for water-based drilling fluid and preparation method of flow pattern regulator

A technology of water-based drilling fluid and flow regulator, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of unusability and insufficient temperature resistance, and achieve the effect of adjusting rheological properties

Pending Publication Date: 2022-07-29
CHINA OILFIELD SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flow regulators currently researched and developed have insufficient temperature resistance and cannot be used in brine systems above 200°C

Method used

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  • Flow pattern regulator for water-based drilling fluid and preparation method of flow pattern regulator
  • Flow pattern regulator for water-based drilling fluid and preparation method of flow pattern regulator
  • Flow pattern regulator for water-based drilling fluid and preparation method of flow pattern regulator

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preparation example Construction

[0045] The present invention also provides a method for preparing a flow-pattern regulator for water-based drilling fluid, such as figure 2 As shown, the preparation method includes:

[0046] (1) Add deionized water into the reaction vessel, add the first monomer and the second monomer in sequence, adjust the pH value to 7-8, and then add the third monomer and the fourth monomer in sequence to obtain a reaction system.

[0047] First, prepare the first monomer, the second monomer, the third monomer and the fourth monomer in proportion. Add the first monomer and deionized water to the reaction vessel, stir to dissolve the first monomer, then add the second monomer to the reaction vessel, and adjust the pH value of the solution to neutral (that is, the pH value is 7 to 8). Then add the third monomer and the fourth monomer in sequence, and stir until dissolved. Supplement deionized water to the reaction vessel, so that the sum of the first monomer, the second monomer, the thi...

Embodiment 1

[0056] First, take a three-necked flask, dissolve the monomer acrylamide AM (10.5 g) in 162 g of distilled water, add acrylic acid AA (25 g), and stir and mix for later use. Weigh 8.1g of sodium hydroxide and dissolve it in 30g of water, add the alkali solution to the above-mentioned acrylamide and acrylic acid solution, adjust the pH of the solution to 7-8, and continue to add N-vinylpyrrolidone (14.2g) to the solution, 11 After sodium carbenoate (1.6 g) was stirred for 5 min, the solution was heated to 40° C. and nitrogen gas was introduced to remove dissolved oxygen in the solution. Keep the nitrogen flow for 30min, dissolve azobisisobutylimidazoline hydrochloride in distilled water to make a solution with a mass concentration of 5%, after the nitrogen flow time reaches 30min, add the above 5% azobisisobutylimidazoline 2 g of the hydrochloride solution was kept at 40° C. for 6 hours, and then the obtained colloid was dried to obtain a temperature-resistant and salt-resistan...

Embodiment 2

[0058] First, take a three-necked flask and dissolve the monomer acrylamide AM (2.5g) in 100g of distilled water, add 2-acrylamido-2-methylpropanesulfonate sodium AMPS-Na (13.5g), stir and mix for later use, adjust The pH of the solution is 7 to 8. Continue to add N-vinylpyrrolidone (3.5 g) to the solution. After stirring for 5 min with undecylenamide (0.5 g), the solution is heated to 40° C. and nitrogen is introduced to remove the solution. dissolved oxygen. Keep the nitrogen flow for 30min, dissolve azobisisobutylimidazoline hydrochloride in distilled water to make a 5% solution, after the nitrogen flow time reaches 30min, add the above 5% azobisisobutylimidazoline hydrochloride The solution was 0.7 g, and the temperature was kept at 40° C. for 10 h, and then the obtained colloid was dried to obtain a temperature-resistant and salt-resistant polymer.

[0059] image 3 It is the infrared spectrum of the temperature-resistant and salt-resistant polymer prepared in this exam...

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Abstract

The invention provides a flow pattern regulator for a water-based drilling fluid. The flow pattern regulator is prepared by carrying out polymerization reaction on the following raw materials: 10-40% of a first monomer, 40-70% of a second monomer, 10-40% of a third monomer and 0.5-3% of a fourth monomer, wherein the first monomer is acrylamide, the second monomer is acrylic acid or sodium 2-acrylamido-2-methylpropanesulfonate, the third monomer is N-vinyl pyrrolidone, and the fourth monomer is sodium undecylenate, 1-undecylenamide, octadecyl dimethyl allyl ammonium chloride, 2-acrylamido hexadecyl sulfonic acid or divinyl benzene. The invention also provides a preparation method of the flow pattern regulator for the water-based drilling fluid. The preparation method comprises the following steps: preparing a reaction system, carrying out polymerization reaction, drying and crushing. The flow pattern regulator for the water-based drilling fluid has the advantages of temperature resistance and salt tolerance.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a flow-pattern regulator for water-based drilling fluid and a preparation method thereof. Background technique [0002] With the deepening of oil and gas exploration and development, the drilling business will face more and more drilling operations in high-temperature, high-salt reservoirs and complex conditions. The solid-free water-based drilling fluid is a system applied under the drilling conditions of the reservoir section. When the temperature is higher than 200 °C, the stability of these organic treatment agents will be greatly reduced, or even invalid, which will make the rheological instability of the system, which will have a serious impact on the safety and efficiency of drilling fluid operations. In order to deal with such problems, scholars at home and abroad have carried out some researches. However, the current research and development of the flow ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/56C08F226/10C08F220/58C08F220/64C08F220/70C08F226/02C08F212/36C09K8/035C09K8/12
CPCC08F220/06C08F220/585C09K8/035C09K8/12C08F220/56C08F226/10C08F220/64C08F220/70C08F226/02C08F212/36
Inventor 王超群陈缘博夏小春李自立胡悦悦王志永张宇飞张鹏陈强向雄
Owner CHINA OILFIELD SERVICES
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