Spectrum Gamma Logging Tool (SLT-0)

The SLT tool measures the total natural gamma ray and the amounts of potassium(K), uranium(U), and thorium(Th) according the energy level to clearly get the formation property.Software patch is added to the corresponding service table program to improve   the measurement accuracy ofK,U,Th.


Specification:

Make-up Length:2230mm/87.79inches

Shipping Length:2698m/106.2 inches

OD:92mm/3.62 inches

Max. Temperature:175°C,4h

Max. Pressure:140Mpa

Max.Deviation:45°

Min. applicable hole: 120.7mm/4.75inches

Max. borehole: Limited to Centralizer used Max. logging speed

G/R Spectrum:3m/min, G/R:9m/min


Measurement Range

GR:2500API K: 100%

U:250ppm Th: 700ppm

Measurement Accuracy:GR:±3%(value)K,U,Th:±4%(value)comparison between the standard value and the actual value

Working Voltage & Current:180VAC,6-10mA

Depth of Investigation: 304.8mm/12inches ； (estimated for a 200 mm/7.88 inchesin

water-filled borehole with nominal 20% porosity formation)

Vertical resolution: 381mm/15 inches, given proper formation contrasts above and below zone of interest

Gamma Energy Range:0.06—3.5Mev

Max.Tensile strength:78000lbs Max. Compressive strength:78000lbs


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