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Preparation method of sheet type high-temperature-resistant self-suspension plugging agent

A high-temperature-resistant, self-suspension technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of difficult adjustment and control of thickness, poor suspension dispersion, insufficient temperature resistance, etc., to achieve excellent heat resistance, durability Good thermal performance and wide application range

Active Publication Date: 2020-07-24
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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  • Preparation method of sheet type high-temperature-resistant self-suspension plugging agent
  • Preparation method of sheet type high-temperature-resistant self-suspension plugging agent
  • Preparation method of sheet type high-temperature-resistant self-suspension plugging agent

Examples

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Effect test

Embodiment 1

[0033] (1) Preparation of high temperature resistant thermosetting resin sheet: After 140g of amino silicone oil and 162g of formaldehyde aqueous solution (37%) are dispersed with 200ml of dioxane respectively, they are put into a reactor and stirred and mixed. The temperature of the reactor is controlled below 10°C, and slowly add 228g of bisphenol A; after mixing evenly, heat up and reflux for 3 hours; then stop the reaction, evaporate and remove the solvent to obtain a viscous prepolymer liquid, add 1% hydrochloric acid to the obtained prepolymer liquid, mix evenly and load Put it into the mold, raise the temperature to 220°C, and react for 6 hours to obtain a high-temperature-resistant thermosetting resin sheet;

[0034] (2) Surface grafting 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, dispersed in the aqueous solut...

Embodiment 2

[0036] (1) Preparation of high temperature resistant thermosetting resin sheet: After 154g of amino silicone oil and 180g of formaldehyde aqueous solution (37%) are dispersed with 220ml of dioxane respectively, they are put into a reactor and stirred and mixed. The temperature of the reactor is controlled below 10°C, and slowly add 240g Bisphenol A. After mixing evenly, the temperature was raised, and the reaction was refluxed for 4 hours. The reaction was then stopped and the solvent was removed by evaporation to obtain a viscous prepolymer liquid. Add 1.5% hydrochloric acid to the obtained prepolymer liquid, mix evenly, put it into a mold, heat up to 250°C, and react for 5 hours to obtain the high temperature resistant thermosetting resin sheet of the present invention;

[0037] (2) Surface grafting 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 a...

Embodiment 3

[0039] (1) Preparation of high temperature resistant thermosetting resin sheet: After 168g of amino silicone oil and 190g of formaldehyde aqueous solution (37%) are dispersed with 250ml of dioxane respectively, they are put into a reactor and stirred and mixed. The temperature of the reactor is controlled below 10°C, and slowly add 273g of bisphenol A; after mixing evenly, heat up and reflux for 5 hours and then stop the reaction, evaporate and remove the solvent to obtain a viscous prepolymer liquid, add 2% hydrochloric acid to the obtained prepolymer liquid, mix evenly and load In the mold, heat up to 250°C and react for 4 hours to obtain the high temperature resistant thermosetting resin sheet of the present invention;

[0040](2) Surface grafting 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, dispersed in the aqueous ...

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Abstract

The invention discloses a sheet type high-temperature-resistant self-suspension plugging agent and a preparation method thereof, and belongs to the technical field of oil field engineering drilling plugging. The preparation method comprises the following steps: taking bisphenol A, amino silicon oil and formaldehyde as main raw materials, carrying out prepolymerization, and carrying out mould pressing and curing in a mould to form a three-dimensional cross-linked thermosetting sheet; and then carrying out graft modification on the surface of the resin sheet by utilizing hydroxyl-terminated polyethylene glycol to obtain a final product. The thermosetting resin prepared by the preparation method adopts a compression molding process, the thickness size is adjustable and controllable, and the thermosetting resin is good in high-temperature resistance due to the fact that a large number of aromatic structural units and polysiloxane structural components which are crosslinked with one anotherexist in molecules, and a good leaking stoppage and leakage prevention effect can be achieved in an environment of 150 DEG C or above; besides, flexible polyethylene glycol molecular chains exist onthe surfaces of the resin sheets so that the resin sheets can be uniformly and stably suspended and dispersed in the drilling fluid, and the problem that a conventional plugging agent is difficult toapply or poor in using effect due to sedimentation in the drilling fluid is avoided or relieved.

Description

technical field [0001] The invention belongs to the technical field of oil field engineering drilling plugging, and in particular relates to a preparation method of a sheet-type high-temperature-resistant self-suspension plugging agent. Background technique [0002] Lost circulation is the phenomenon that drilling fluid leaks into the bottom layer under the action of pressure difference during drilling, cementing, workover and other downhole operations. In downhole operations, lost circulation is a phenomenon that often occurs. Once it happens, it will not only delay the drilling progress, lose the drilling fluid, increase the drilling cost, but also damage the oil and gas layers and interfere with the geological logging work. When the leakage is serious, it is easy to cause adverse conditions such as pipe sticking, blowout, and well collapse, and even lead to the scrapping of the wellbore, resulting in huge economic losses. [0003] Aiming at the oil and gas engineering p...

Claims

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Application Information

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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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