Wellbore tool stroke indicator system and tubular patch
US5957195A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1997 |
| Grant date | Sep 28, 1999 |
| Priority date | — |
| Expiry date | Oct 7, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/095
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A stroke indicator has been invented for indicating that a movable inner member of an hydraulically activated wellbore tool or apparatus has moved, particularly that movement of such a member indicating that a stroke of the tool or apparatus has occurred. In one aspect such an indicator is used to indicate that the stroke of a wellbore tubular patch expander system has been completed. A tubular patch has been invented which includes two or more connected tubular patch members. A tubular patch system has been invented for patching operations which, in one aspect, is useful as a "through tubing" tubular patch system and has a body and a series of selectively expandable members which, once having passed through a tubular of a first diameter, are expandable in a tubular of a second diameter larger than the first diameter and then operable to expand a liner patch to seal a leak in the tubular of the second diameter. Such a system may be used in a tubular disposed within a wellbore or in a tubular on the earth surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.