- 9074

The 9074, 8074, 7074 and 6074 Three Arm Caliper logging tools, are a three-arm caliper configuration used to measure the diameter of the borehole. They can be used in both open and cased holes. Natural Gamma and the casing collar locator are optionally available. However, when configured with both the natural gamma and casing collar locator the tool is slightly longer.


Fully downhole digital
Quick automatic setup, unique tool identification
Designed for one-man operation
Can be customized to your specific needs

Properties Measured:

  1. Natural Gamma: (optional)
    2.2 x 10.16 cm (0.875 x 4.0 in.)
    NaI Scintillation
    Offset: 14.6 cm (5.76 in.)

  2. Casing Collar Locator: (optional)
    Dual magnet and coil assembly Offset: 14.6 cm (5.76 in.)

  3. Three Arm Caliper:
    Short- or Long- arm configuration, motor operated
    Sensor Offset:
    Short-arm: 220.4 cm (86.8 in.)
    Long-arm: 241.0 cm (94.9 in.)


Tool Length:

With Short-arms: 226 cm (89 in.)

With Long-arms: 264 cm (104 in.)

Temperature: 85 C (185 F)

Diameter: 50.8 mm (2.0 in.)

Pressure: 281 kg/cm2 (4000 PSI)


Short-arm: 18.5 kg (48 lbs.)

Long-arm 20.8 kg (54 lbs.)

Logging Speed: 9 m/min. (30 ft./min.)

Tool Voltage Required: 56 VDC


Tool #:9074

Part #:298000A


9074 Product Description

© 2019 by Century Geophysical, L.L.C.