Fluid loss control system
US4474667A · kind A · utility
29Cited by
5References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 6, 1982 |
| Grant date | Oct 2, 1984 |
| Priority date | — |
| Expiry date | Dec 6, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/903
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A composition capable of imparting fluid loss control properties to aqueous systems. The composition is an admixture of: PA0 (a) a solid particulate material having a particle size distribution wherein at least about 90% of said material is capable of passing through a No. 20 U.S. Standard (Fine Series) Sieve; and PA0 (b) a cross-linked hydroxyalkyl cellulose; wherein the amount of component (a) to component (b) is in the weight ratio of at least about 0.5. 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.