Annulus access valve system
Patent
·
OSTI ID:6759397
This patent describes an annulus access apparatus for use in a drill string positioned in a well bore, the apparatus comprising: a valve adapted for fitting in the drill string and defining a longitudinal opening therethrough and a substantially transverse port therein for interconnecting the longitudinal opening with an annulus formed between the valve and the well bore. The valve includes annulus access means for placing the transverse port in communication with the longitudinal opening when in an open position and covering the transverse port when in a closed position; a retrievable actuator movable through a central opening of the drill string for moving the annulus means from the closed position to the open position and having selectable fluid flow control means for alternately preselecting one of a closed position thereof. Fluid pumped through the drill string will be totally diverted through the transverse port in the valve when the annulus access means is in the annulus access means open position, and a preset open position thereof. A portion of the fluid is diverted through the transverse port in the valve with a remaining portion of the fluid continuing downwardly through the central opening of the drill string below the valve; and return means for returning the annulus access means to the closed position when the actuator is retrieved from the valve.
- Assignee:
- NOV; NOV-87-050020; EDB-87-062321
- Patent Number(s):
- US 4645006
- OSTI ID:
- 6759397
- Country of Publication:
- United States
- Language:
- English
Similar Records
Gravel packing apparatus and method
Open hole pipe recovery circulation valve
Multiple sample annulus pressure responsive sampler
Patent
·
Tue Oct 20 00:00:00 EDT 1987
·
OSTI ID:5601946
Open hole pipe recovery circulation valve
Patent
·
Tue Aug 11 00:00:00 EDT 1987
·
OSTI ID:6069634
Multiple sample annulus pressure responsive sampler
Patent
·
Tue Aug 31 00:00:00 EDT 1993
·
OSTI ID:6180189