Model id: Robertson Geologging Impeller Flowmeter with natural gamma
Purpose: fluid flow along along the borehole
Description: The probe is equipped with lightweight helical impellers mounted on double sapphire bearings for maximum sensitivity. The impellers contain magnets which actuate low-drag Hall-effect switches within the probe to detect impeller rotation. Separate log channels record the time of rotation according to fast and slow timebases for improved resolution at high and low flow rates. Uphole and downhole rotations are distinguished within the sonde. The impeller flowmeter gives a direct log measurement of cable speed to aid this procedure. Our probe has been fitted with temperature and pressure sensor.
Characteristics: Impeller Rotation Rate; Time per Impeller revolution; Cable Velocity; Natural Gamma; Temperature
|Maximum pressure:||20.0 MPa|
liquidThe borehole has to be filled with some sort of liquid.
|Type of datatransfer:|
cableData are transferred in real time via a cable.
|Required type of logging cable:|
4 conductorA logging cable with 4 conductors.
GO4Connector according to GO 4 standard (4 conductors).
Implement search on winches with this cable head.
|Type of signal:|
digitalDigital signal transmission.
|Maximum diameter:||0.070 m|
|Belongs to toolstring:|
standaloneA stand alone tool that cannot be integrated in a tool string.
|Usage conditons:||Commercial usage allowed/welcome.|
|Additional usage conditions:||Logging as service by Lund University|
Operator and contact:
|Operator:||Lund University, Engineering Geology|
|Contact person:||Per-Gunnar Alm|
John Ericssons väg 1|
|223 63 Lund, Sweden|