Viscosifier and fluid loss control system
US4428845A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1981 |
| Grant date | Jan 31, 1984 |
| Priority date | — |
| Expiry date | Dec 2, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/22
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A composition capable of imparting pseudoplasticity and fluid loss control properties to aqueous systems. The composition is formed from a combination of: PA1 (a) a hydroxy containing aluminum component and PA1 (b) a reaction product of a polyaldehyde and a polyvinyl alcohol, said polyaldehyde present in from 0.01 to 0.1 percent of stoichiometry; wherein the amount of component (a) to component (b) is in the weight ratio capable of directly forming, when mixed with sufficient water, an aqueous system having from about 0.5 to 10 weight percent of component (a) and from about 0.3 to 5 weight percent of component (b) based on the weight of the water of the system. The invention is further directed to improved drilling fluids containing said composition and to the process of drilling bore holes using said improved fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.