Lifting-lowering mechanically operated test tools, catalog page 44
Multi-Flow Test Valve
Downhole shut-in valve operated by picking up and slacking off the string
Description
The multi-flow test valve is a downhole shut-in tool without a full bore, operated by lifting and lowering the string. It is used for testing and completion in open holes and cased holes.
Features
- Up-and-down string movement controls opening and closing of the test valve — simple and reliable
- Remains shut in while running in
- When the valve opens, the string drops freely about 1 in, giving a clear indication at surface
- A fluid sample at formation pressure can be obtained after the flow period
Operation
To open, slack off string weight; after a delay the string drops freely about 1 in, the test valve opens and formation fluid starts to flow. To close, pick up the string above the free point and then slack off weight. To reopen, pick up above the free point and slack off again; after a while the string drops about 1 in freely and the well opens again.
