GCT

GR/CCL/Temp ToolThe Gamma Ray/Collar Locator/Temperature Tool (GCT) can be run together with the FHT Telemetry tool providing the following signals:

  • Gamma Ray PMT (GR): measure the natural gamma ray levels within the wellbore.
  • Collar Locator (CCL): measure changes in metal mass, creating a better chance of detecting the small gap in flush joint pipe, or collars in heavily corrosion-encrusted casing.
  • Temperature Tool (RTD): The Platinum Resistance Thermometer Tool measures Downhole temperatures by measuring the resistance of a fast responding platinum resistance element. The probe is contained in a thin, pressure tight Inconel® needle, protruding into an open slot through which borehole fluid can flow.

Specifications

Gamma Ray  

Operating Voltage

+18VDC

Current draw

10mA

Depth Resolution 6' typical

High Voltage Power Supply

700VDC to 1,800VDC (controlled from surface)

Temperature Sensor

 

Operating Voltage

+18VDC

Current draw

10mA 

Resolution

0.15 deg C

Max. range

+50 deg C to 260 deg C

CCL

 

Operating voltage

+18VDC

Current draw

10mA

Sensitivity

1mV

Gain

Controlled from surface

Dimensions

 1-11/16” (43mm) O.D. by 46.63” (1,1184.4mm) Long

 

 

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