The Diverter Basket Flowmeter Tool (DBT) is designed to provide accurate measurements of total flow rate in low multiphase flows in vertical or deviated wells at stations along the borehole.
Description
The DBT operates as part of an Ultrawire™ toolstring and has a motor-controlled, patented fabric basket to divert well bore flow through a modified in-line spinner, which allows for accurate measurement of the flow rate of all the fluids flowing along the well bore at the position of the skirt.
The basket effectively reduces the flow cross-sectional area, allowing measurements in very low fluid velocities. In multi-phase fluids, the tool minimises the segregation effects. For more accurate hold-up measurements, a shroud may be fitted to the exit of the in-line spinner housing to redirect flow through a radioactive Density tool.
The basket is opened and closed by a motor section at the lower end of the tool, powered by a high current lithium battery. The DBT is run in hole closed and opened at stationary positions after exiting the tubing; before repositioning or re-entering the tubing the basket must be closed.
Features
- Flow measurements whilst stationary and in low or medium flow rate wells.
- Multiphase (especially inclined) segregated flow.
- Used in vertical or deviated pipe up to 9 5/8in diameter. All deviations are subject to controllable up-thrust.
- An extender flow tube can be attached for use with an FDR.
- Can be run inverted in injection wells.
- Used in combination with a Memory Battery Holder (MBH018) for provision of power to the diverter motor and motor control circuitry.
- Simultaneous operation with other Ultrawire™ tools.
- Also available with outside diameter of 2 1/8in.
- Baskets for casing sizes 3in to 9 5/8in.
