Optimum oil-well casing heating
US6353706B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 26, 2000 |
| Grant date | Mar 5, 2002 |
| Priority date | — |
| Expiry date | Oct 26, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An electrical heating method and apparatus for minerals wells having a metallic fluid admission section located adjacent a hydrocarbonaceous reservoir of a heterogeneous reservoir that has at least two longitudinally spaced producing intervals having different thermal heat transfer characteristic. The method includes providing a downhole electrically energized heater having at least two independently controlled heating elements spaced longitudinally apart from each other. At least one of the heating elements is positioned near a first of the producing intervals adjacent the fluid admission section. The second of the heating elements is positioned near a second of the producing intervals adjacent the fluid admission section. Electrical energy is supplied to each of the heating elements to increase the temperature of the producing interval near each of the heating elements where the temperature is measured adjacent each of the heating elements and the quantity of electrical power supplied to each of the heating elements is controlled in accordance with the thermal transfer characteristic of each of the producing intervals to realize a specific temperature need near each of the heatin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.