Flowmeters - Cased-Hole Log Analysis and Reservoir Performance Monitoring - page 65

Full-Bore Flowmeters
The full-bore flowmeter is a variation of the continuous flowmeter. In the collapsed
mode, the tool will fit inside the tubing. Once past the end of the tubing and into the
casing, the tool may be opened and spinner blades will be extended to cover a large
portion of the area available for wellbore fluids. This mechanical marvel thus
extends the usefulness of continuous flowmeters to cover low-flow rates and can
record flows of as little as 200 B/D in 5½-in. pipe. Figure 5.6 shows the full-bore
flowmeter in the closed and opened modes.
Fig. 5.6 Full-bore flowmeter.
( a ) Tool closed, ( b ) Tool
open. Courtesy Schlumberger
Combination Tools
It should be noted that flowmetering tools are frequently run in combination with
other sensors such as temperature, fluid density, fluid pressure, etc. Examples of
these combined tools include the PCT (production combination tool) illustrated in
Fig. 5.7 .