A kind of preparation method of sheet type high temperature resistant self-suspension plugging agent

A high-temperature-resistant, self-suspending technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of insufficient temperature resistance, difficult adjustment and control of thickness, poor suspension dispersion, etc., and achieves excellent heat resistance, suitable for Wide range, good heat resistance effect

Active Publication Date: 2022-05-03
江苏鼎峰石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a sheet-type high-temperature-resistant self-suspension plugging agent and its preparation method, which solves the difficulty of adjusting and controlling the thickness of the traditional sheet-shaped plugging agent, and the suspension and dispersion in the plugging liquid. Improve the convenience of use and plugging effect of the sheet-shaped plugging agent

Method used

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  • A kind of preparation method of sheet type high temperature resistant self-suspension plugging agent
  • A kind of preparation method of sheet type high temperature resistant self-suspension plugging agent
  • A kind of preparation method of sheet type high temperature resistant self-suspension plugging agent

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Effect test

Embodiment 1

[0033] (1) Preparation of high temperature resistant thermosetting resin sheet: after 140g amino silicone oil and 162g formaldehyde aqueous solution (37%) were dispersed with 200ml dioxane respectively, put into the reaction kettle and stir and mix, and the temperature of the reaction kettle was controlled below 10°C, slowly adding 228g of bisphenol A; after mixing evenly, heat up and reflux for 3 hours; then stop the reaction, evaporate the solvent to obtain a viscous prepolymer liquid, add 1% hydrochloric acid to the obtained prepolymer liquid, mix well, and then pack Put it into a mold, heat it up to 220°C, and react for 6 hours to obtain a high temperature resistant thermosetting resin sheet;

[0034] (2) Surface graft modification of the high temperature resistant thermosetting resin sheet: after the surface of the high temperature resistant thermosetting resin sheet obtained in step (1) is activated with sulfuric acid, it is dispersed in an aqueous solution, and 10% of th...

Embodiment 2

[0036] (1) preparation of high temperature resistant thermosetting resin sheet: after 154g amino silicone oil and 180g formaldehyde aqueous solution (37%) were dispersed with 220ml dioxane respectively, put into the reaction kettle and stir and mix, and the temperature of the reaction kettle was controlled below 10 ° C, slowly adding 240g Bisphenol A. After mixing uniformly, the temperature was raised, and the reaction was refluxed for 4 hours. The reaction was then stopped and the solvent was evaporated to give a viscous prepolymer liquid. 1.5% hydrochloric acid was added to the obtained prepolymer liquid, mixed evenly, and then loaded into a mold, heated to 250° C., and reacted for 5 hours to obtain the high-temperature-resistant thermosetting resin sheet of the present invention;

[0037] (2) Surface graft modification of high temperature resistant thermosetting resin sheet: after the surface of the high temperature resistant thermosetting resin sheet obtained in step (1) ...

Embodiment 3

[0039] (1) Preparation of high temperature resistant thermosetting resin sheet: after 168g amino silicone oil and 190g formaldehyde aqueous solution (37%) were dispersed with 250ml dioxane respectively, put into the reaction kettle and stir and mix, and the temperature of the reaction kettle was controlled below 10 ° C, slowly adding 273g of bisphenol A; after mixing uniformly, the temperature was raised and refluxed for 5 hours and then the reaction was stopped, and the solvent was evaporated to obtain a viscous prepolymer liquid, 2% hydrochloric acid was added to the obtained prepolymer liquid, and the mixture was uniformly mixed. In the mold, the temperature is raised to 250°C, and the reaction is performed for 4 hours to obtain the high temperature resistant thermosetting resin sheet of the present invention;

[0040](2) Surface graft modification of the high temperature resistant thermosetting resin sheet: after the surface of the high temperature resistant thermosetting r...

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Abstract

The invention discloses a sheet-type high-temperature-resistant self-suspension plugging agent and a preparation method thereof, belonging to the technical field of oil field engineering drilling plugging. The present invention uses bisphenol A, amino silicone oil and formaldehyde as main raw materials, and after prepolymerization, molding and curing in a mold to form a three-dimensional cross-linked thermosetting sheet; then use hydroxyl-terminated polyethylene glycol to graft the surface of the resin sheet modified to obtain the final product; the thermosetting resin prepared by the present invention adopts a compression molding process, and the thickness and size are adjustable and controllable. It has good high temperature resistance and can play a good plugging and anti-leakage effect in an environment above 150 °C; in addition, the flexible polyethylene glycol molecular chains on the surface of the resin sheet enable it to be uniformly and stably suspended and dispersed in the drilling fluid , to avoid or alleviate the problem of difficult application or poor use effect of conventional lost circulation plugging agents caused by sedimentation in drilling fluid.

Description

technical field [0001] The invention belongs to the technical field of oilfield engineering drilling and plugging, and in particular relates to a preparation method of a thin-film type high-temperature-resistant self-suspending plugging agent. Background technique [0002] Work loss is the phenomenon that drilling fluid leaks into the bottom layer under the action of pressure difference during downhole operations such as drilling, cementing, and workover. Loss of circulation is a common phenomenon in downhole operations. Once it occurs, it will not only delay drilling progress, lose drilling fluid, increase drilling cost, but also damage oil and gas layers and interfere with geological logging work. When the leakage situation is serious, it is easy to cause bad conditions such as drilling sticking, blowout, well collapse, etc., and even lead to the scrapping of the wellbore, resulting in huge economic losses. [0003] In response to the oil and gas engineering problem of d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/12C08J5/18C08G14/073C09K8/035C09K8/24C09K8/44C08L61/34
CPCC08J7/12C08J5/18C08G14/06C09K8/035C09K8/24C09K8/44C08J2471/02C08J2361/34
Inventor 唐华胡杰陈亮于培志
Owner 江苏鼎峰石油科技有限公司
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