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Downhole gamma-densitometer-thickness gage, high-temperature high-pressure SGDT-6TB

СГДТ-6ТБ
DESIGNED FOR evaluation of annulus cementing quality and identification of casing wear zones in oil and gas wells.

USED FOR logging of cased holes filled with any mud; operates with a three-conductor logging cable not more than 7000 m long.

APPLICATIONS:
cement raising evaluation;
identification of intervals with different cement types (cement, gel-cement etc.);
casing string eccentricity determination;
dentification of collars, cementing cages, packers;
perforation intervals and casing wear identification.

The sonde consists of a gamma ray source Cs-137 (activity 0.3÷1.4 Cu), six gas-filled counters in differential channels of densitometer, one gas-filled counter in integral channel of thickness gage, and one scintillation detector in GK channel.

 MEASURED PARAMETERS Range Error
Cement density 1.0÷2.0 g/cm³ ±1.15 g/cm³
Casing string thickness 5.0÷12 mm ±0.5 mm

 GENERAL SPECIFICATIONS
Tool length, mm 3185 не более
Tool mаx diameter, mm 110 не более
Tool weight, kg 100 не более
Tool power supply:
Supply voltage, V
Supply frequency, Hz
220
50
10%
1%
Ambient operating temperature, °С 175  
Max operating pressure, MPa 120  
Borehole diameter, mm 120÷180  
Logging speed, m/hr 200÷300  
Records frequency, pollings per 1 m 5÷10  
Combinability bottom  
Location in the borehole must be centralized