In-situ retorting system
US4185871A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | May 23, 1978 |
| Grant date | Jan 29, 1980 |
| Priority date | — |
| Expiry date | May 23, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/247
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A carbonaceous deposit is retorted in an array of in-situ retorts comprising rectangular retorts arranged in rows. Adjacent rows of retorts are separated by an unbroken pillar extending the length of the rows. The bottoms of the in-situ retorts slope downwardly from a first side to the opposite side. An exhaust tunnel for the deliver of products from the retort located below the bottom of the retort extends longitudinally of the row with its outer wall approximately in alignment with, but not extending laterally beyond, the pillar to maintain the integrity of the pillar. The system is especially advantageous in the retorting of oil shale and is described in detail for that application.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.