Lignin-derived environmentally-friendly viscosity reducer for drilling fluid, and preparation method thereof
A lignin and drilling fluid technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as increased soaking expansion and collapse, decreased drilling fluid density, and increased fluid loss
Active Publication Date: 2020-01-24
XI'AN PETROLEUM UNIVERSITY
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Abstract
The invention relates to a lignin-derived environmentally-friendly viscosity reducer for a drilling fluid, and a preparation method thereof. The method comprises the following steps: mixing a lignin material with water in a reaction vessel at normal temperature; adding a metal salt into the reaction container according to a mass ratio of the metal salt to the lignin material is 1:(2-10); adding afoam inhibitor into the above mixed solution in the reaction container, and adding formaldehyde accounting for 0.1-3% of the mass of the lignin material into the mixed solution; and evaporating away the solvent of the mixture, and crushing the evaporated mixture to 40 meshes or below to obtain the product. The obtained product has a strong viscosity reduction effect, and the foaming effect of theproduct is eliminated, so that the product is suitable for field application.
Application Domain
Drilling composition
Technology Topic
Process engineeringDrilling fluid +6
Examples
- Experimental program(6)
Example Embodiment
Example Embodiment
Example Embodiment
PUM
Property | Measurement | Unit |
Glass transition temperature | 163.6 | °C |
Glass transition temperature | 163.3 | °C |
Glass transition temperature | 164.5 | °C |
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