Downhole tool and method
US6405798B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1998 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Aug 19, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B23/001
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole tool and apparatus is described for logging and/or remedial operations in a wellbore in a hydrocarbon reservoir. The tool comprises an autonomous unit (1) for measuring downhole conditions, preferably flow conditions. The autonomous unit comprises locomotion means (12) for providing a motion along said wellbore; means (14) for detecting said downhole conditions; and logic means (113) for controlling said unit, said logic means being capable of making decisions based on at least two input parameters. It can be separately attached to a wireline unit (22) connected to the surface or launched from the surface. The connection system (31, 32) between both units can be repeatedly operated under down hole conditions and preferably includes an active component for closing and/or breaking the connection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.