Flow controlling apparatus
US4540047A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1983 |
| Grant date | Sep 10, 1985 |
| Priority date | — |
| Expiry date | Jul 14, 2003 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
This application discloses apparatus in which a body means having a bore therethrough connected as part of a tubing string is packed off within a well bore, and means including a passageway in the body means by-passes the packer to connect the annulus about the tubing string above and below the packer. The packer is expanded into engagement with the well bore upon release of a means for locking it in an inoperative position, and a means for so releasing the locking means includes a piston in the passageway which in responsive to control fluid supplied through a control line in the annulus which connects with the passageway. Upon release and setting of the packer, the piston is removed from the passageway and circulation of well fluid through the connecting means between the annulus above and below the packer is controlled by a safety valve which normally closes the passageway, but which is responsive to control fluid supplied thereto through the same control line. Each of the means for connecting the control line with the passageway in order to release the packer, and alternatively establishing safety valve controlled circulation of well fluid through the connecting means comprise …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.