Apparatus for obtaining uniform gas flow through an in situ oil shale retort
US3941421A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1974 |
| Grant date | Mar 2, 1976 |
| Priority date | — |
| Expiry date | Aug 13, 1994 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/243
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An in situ oil shale retort in which a cavity filled with broken particles of oil shale is formed within the subsurface oil shale formation and air is forced down through the cavity to sustain combustion of the top layer of oil shale particles. The products of combustion are withdrawn through a plurality of transverse exhaust pipes at the bottom of the cavity, the exhaust pipes each being provided with a series of holes along the length of the pipes within the cavity, the holes being graded in size to compensate for the pressure drop along the length of the pipe so as to provide substantially equal volume of gas flow through each of the openings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.