Mechanically actuated subsurface injection tool
US4722400A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 12, 1986 |
| Grant date | Feb 2, 1988 |
| Priority date | — |
| Expiry date | May 12, 2006 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An injection tool for use in injecting fluids into perforations of a production formation of an oil or gas well is mechanically set in the bore of the casing traversing the production formation, and mechanically releasable therefrom so that chemical treatment fluid can be injected between upper and lower packing elements into a single or a selected vertical group of perforations. The injection tool is connected to the tubing string by a circulation valve operable by rotational movement of the tubing string. Injection of the chemical fluid treatment is accomplished with the circulation valve in the closed position, while the circulation valve is opened to equalize tubing and annulus pressure whenever required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.