Downhole tool and method of using the same
US4508174A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1983 |
| Grant date | Apr 2, 1985 |
| Priority date | — |
| Expiry date | Mar 31, 2003 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole tool includes a pipe string portion which is disposed in a pipe string of a well and a probe portion which can be lowered by wireline or other suitable means into the well for engagement with the pipe string portion. The pipe string portion includes a sliding sleeve valve which is biased in a closed, or unactuated position, by a spring contained within the pipe string portion. The probe portion includes a connector mechanism which engages lugs of the pipe string portion for imparting an opposing force to the sliding sleeve valve which overcomes the biasing force of the spring so that the valve can be opened to permit reservoir pressure to enter a cavity of the probe portion containing a sensor mechanism. The coupling and decoupling of the connector mechanism with the lugs is effected through two downward and two upward movements of the probe portion. The probe portion also includes a jarring mechanism for applying either an upward or a downward force impulse to the probe portion to facilitate its movement should it become stuck, for example.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.