Acid soluble weighting agent for well drilling, workover and completion fluids
US4337160A · kind A · utility
6Cited by
4References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 23, 1980 |
| Grant date | Jun 29, 1982 |
| Priority date | — |
| Expiry date | May 23, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/925
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A new weighting material for use in controlling the specific gravity of fluids employed in the drilling, completion, perforation and workover of oil and gas wells is disclosed. The material siderite (FeCO.sub.3), has the unique property of being removable from the bottom of well boreholes and producing formation zones by virtue of almost complete solubility in both mineral and organic acids. This weighting material is compatible in both oil and water muds and has a density of 3.8 g/cc which allows formulation of fluid weights up to 19 lbs./gal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.