Process for treating drilled cuttings
US4793423A · kind A · utility
36Cited by
13References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1987 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Jun 8, 2007 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/065
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Used drilling fluids, drilled cuttings and salt contaminated soil, etc., are processed for disposal or reuse by staged water-washing and solids separating procedures which are monitored for the salinity of the water contacting the particles and are repeated to the extent necessary to obtain selected low values, in order to produce saline wash water suitable for injecting into a disposal well and size-graded substantially salt-free materials suitable for construction operations or non-hazardous waste disposal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.