Method of using a heater with a fiber optic string in a wellbore
US6769805B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2002 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Dec 17, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/6884
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A heater cable is deployed in a well bore to elevate the temperature of the wellbore above the temperature of the surrounding fluid and the formation. One or more fiber optic strings are included in or carried by the heater cable which is placed along a desired length of the wellbore. At least one fiber optic string measures temperature of the heater cable at a plurality of spaced apart locations. Another string is utilized to determine the temperature of the wellbore. The heater cable is heated above the temperature of the well bore. The fluid flowing from the formation to the wellbore lowers the temperature of the cable at the inflow locations. The fiber optic string provides measurements of the temperature along the heater cable. The fluid flow is determined from the temperature profile of the heater cable provided by the fiber optic sensors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.