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Сaliper-profiler 4SKP


The tool has the following modifications by max operating temperature T max and upper value of borehole hydrostatic pressure Pmax :
  by temperature: 120, 150, 175, 200 °С,
  by pressure: 80, 100, 120, 140 МPа.
Designed for independent measurement of four radii in two perpendicular planes.

Used for logging of open and cased oil and gas wells; operates with a three-conductor carrying logging cable up to 7000 m long and log recorders that provide for command transfer and data receipt in “Manchester-2” code.

 borehole diameter measurement;
 keyseat detection;
 annular volume calculation;
 well technical condition control etc.

The measurements are held with the help of displacement resistive sensors, each sensor is mechanically connected with its arm.

 Measured parameters Range Error
Arms opening radii 50÷300 mm ±3 mm
Borehole diameter 100÷600 mm ±5 mm

 General specifications
Tool length, mm 4200 not more than
Tool diameter, mm 76 not more than
Tool weight, kg 82 not more than
Power supply:
supply voltage, V
supply frequency, Hz
Power consumption, V·A:
in measuring mode
in drive operation mode




not more than
not more than

Drive control multiple, at the command from the surface  
Arms opening (closing) time, min 2

not more than

Borehole diameter, mm 100÷600  
Logging speed, m/hr up to 2000  
Combinability feed-through  
Location in the borehole clamped