GRT-20 | 2-3/4” Gamma Ray Pulse Tool

The DSS 2 3/4” Gamma Ray pulse Tool (GRT) measures the gamma radiation level of the formation derived from natural isotopes. It can be used as a depth correlation device between cased and open holes. This tool is comprised of a Sodium Iodide scintillation crystal and photomultiplier tube which demonstrate high sensitivity and resolution. The GRT-01 outputs 25 µs pulses in response to gamma radiation within the well.

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Applications

Gamma radiation measurements
Depth correlation
Reservoir delineation

Features

Rated for high-temperature and high-pressure environments
Scintillation crystal combined with a photomultiplier
Compatible with most surface systems
Runs on all standard wirelines
Power and telemetry are connected from the top to bottom of the tool
Can be run by itself, or combined with most analog tools
Electronic design verified for 1 hour operation at 415°F to ensure reliability
Easy to service and maintain

Specifications

Tool Operating Voltage 90-150 VDC Tool Length (make-up) 66.68 cm (26.25 in)
Tool Operating Current 20-25 mA Tool Length (Shipping) 74.93 cm (29.5 in)
Output Pulses Amplitude Negative 7.5 VDC Tool Weight 11.6 Kg (28 Lb)
Output Pulses Width 25 µS Measurement Point from Top of Tool 43.35 cm (17.07 in)
Max. Pressure 172.4 Mpa (25,000 PSI) Borehole Fluids Oil – Fresh Water – Brine
Max. Temperature 204°C (400°F) Top End Connector Contact Socket Go Female
Tool Diameter – OD 69.85 mm(2-3/4 in) Bottom End Connector Contact Pin Go Male

 

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