Heater well method and apparatus
US6079499A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1997 |
| Grant date | Jun 27, 2000 |
| Priority date | — |
| Expiry date | Oct 15, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B36/025
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and apparatus is disclosed for heating of formations using fired heaters. The method includes the steps of: providing a wellbore within the formation to be heated, the wellbore comprising a casing within the formation to be heated, a tubular defining, in the inside of the tubular, a flowpath for hot gases from the surface to a point in the wellbore near the bottom of the formation to be heated, and a volume between the tubular and the casing providing a flowpath for hot gases from near the bottom of the formation to be heated to the top of the formation to be heated, wherein the flowpaths are in communication with each other near the bottom of the formation to be heated and the volume between the casing and the tubular at the top of the formation to be heated is in communication with a point above the surface, and insulation for a portion of the length of the wellbore within the formation to be heated between the flowpath for hot gases from the surface to the point in the wellbore near the bottom of the formation to be heated and the flowpath for hot gases from near the bottom of the formation to be heated to the surface; and supplying a flow of hot gases to the flowpath f…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.