Improved fluid loss control system
US4353804A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1981 |
| Grant date | Oct 12, 1982 |
| Priority date | — |
| Expiry date | Feb 27, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/903
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention is directed to a composition capable of imparting improved fluid loss control properties to aqueous systems. The composition is formed from a combination of: PA0 (a) a solid, particulate silicate or alumino-silicate material; PA0 (b) a reaction production formed from a polyvinyl alcohol and at least 1 percent of stoichiometry of an aldehyde containing or generating agent; wherein the amount of component (a) to component (b) is in the ratio of at least about 0.75:1. Further, the invention is directed to improved drilling fluids containing said composition and to the process of drilling bore holes using said improved drilling fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.