Gas diversion tool
US5893415A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1997 |
| Grant date | Apr 13, 1999 |
| Priority date | — |
| Expiry date | Feb 20, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A gas diverter tool is disclosed for use in improving the operation of an oil and gas well that has cracks, holes or leaks in the casing. The tool includes a thick walled tubular body for in-line threaded connection within a tubing string below a packer carried by the tubing string. The thick wall of the tubular body includes four circumferentially spaced passageways extending longitudinally therethrough to provide gas inlet openings. The upper ends of the passageways are removably closed, and the lower ends are diametrically reduced to provide valve seats. Spherical check valves are loosely received within the passageways above to seat downwardly against the valve seats. Elongated wiper rods are loosely slidable in the passageways and downwardly abut against the ball valves to hold the check valves closes. Intermediate the length of the interior of the body, an undercut portion is provided which opens into the adjacent sides of the passageways to provide a passageway for gas from the exterior of the tool to the interior of the tool and thence to the interior of the tubing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.