311 SPR/Gamma Tool

The 310 GR + SP/SPR is a probe which can record  single point resistance (SPR), spontaneous potential (SP) and gamma ray logs in single run.  

The gamma ray logs record the naturally occurring gamma emissions of the formation surrounding the borehole. SPR and SP values are recorded on the main electrode at the bottom of the probe.  As measurement reference point bridle electrode is used. SP can be measured in passive mode, with tool  powered off, using surface reference electrode.

TECHNICAL DESCRIPTION:

General:

• Tool Diameter: 36mm
• Tool Lenght: 180 cm
• Weight: 6 kg
• Max. pressure: 20 MPa
• Temperature range: up to 125 °C
• Output signal: digital
• Power consumption: 90Vdc/70mA
• Cable: Designed for single conductor cable
• Borehole type: Open hole

Natural Gamma Ray:

• Detector position: 0.3 m from bottom
• Detector type: NaI scintillation detector

SPR-SP:

• Measurement range:
• SP:      -2.5V to 2.5V
• SPR:    1 - 10.000 Ohm
• Measurement electrode position: Bottom of probe

Optional:

• Extended working temperature: up to 175 °C
• Custom output signal
• Custom tool head and diameter
• Additional fluid temperature measurement