Well test apparatus and methods
US4583592A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1984 |
| Grant date | Apr 22, 1986 |
| Priority date | — |
| Expiry date | Apr 27, 2004 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/087
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A well test tool for closing a well at a downhole location below the well packer and near the formation to be tested, the apparatus being openable and closable from the surface by tensioning and relaxing the cable or wire line on which it is lowered into the well, the test tool having a lock mechanism which locks automatically upon entering its landing receptacle in the well and is further provided with a releasing mechanism for unlocking the test tool automatically after a present number of open/close cycles have been performed. A bypass landing receptacle is provided which permits high rates of flow during testing. A modified bypass landing receptacle is provided to permit use of the apparatus above the well packer, as in wells having an existing packer therein. Methods of testing wells are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.