A609 Neutron Tool

Use of neutron logs is accepted as an indicator of moisture content and is used extensively in coal and engineering applications. In rock such as sandstone, the hydrogen content is a direct expression of water content.

The greater the hydrogen content of the surrounding materials in the borehole, the shorter the distance the neutrons travel before capture occurs. Many do not reach the vicinity of the detector. Low counting rates are indicative of high hydrogen content and hence high porosity. It is important to note that the neutron system sees all hydrogen including water in rock pores, bound water in clays and shale, and water of crystallization in minerals such as gypsum.
Normally provided with a 1 Curie (37 GBq) Americium 241 Beryllium source to give high resolution. Optional source strengths of 3 Curies (111 GBq) can be provided to meet individual company requirements.





Specifications

Detector Sensor CounterHelium 3 Proportional
Detector Size25mmx152mm
Detector Spacing320mm
CalibrationAdelaide Test Pits
Units of measureCPS
CommunicationDuplex Digital RS232 Type
Nominal Current60
Power at Sonde (VDC)30
Pressure Rating (KPg/PSI)34500/5000
Temp Rating (Degrees C)0-60
Diameter (mm)43 or 33
Length (mm)1330
Weight (Kg)4.5

Auslog