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Azimuthal Gamma (Collar-based)

Introduction
Azimuthal Gamma Collar-based can realize the detection of formation lithology while drilling, especially maintain borehole trajectory within the target reservoir in horizontal-drilling. It can provide for interpretation of the shale reservoir's organic richness and clay content, identify the top or bottom boundary in CBM. Azimuthal Gamma Probe-based is particularly valuable in unconventional reservoir well placement and evaluation as well as CBM drilling applications.
Features
● Lithology identification
● Qualitative evaluation of shale content and radioactive mineral
● Dynamic rotary geosteering (upper gamma and lower gamma) during drilling
● Eliminate the interference of clay composition to sandstone and sand determination
● Data can be sent to MWD through wireless transmission technology, and then upload to surface.     The signal is strong
● The sensor is installed on the shell, the measurement sensitivity is higher than that of the probe-      based azimuth gamma
● Communicate directly with LHE series MWD through communication sub
Application
● Development of oil sheet and CBM
● Measure natural gamma in specific direction
● Determine the interface position and dip angle of different formation
Technical Parameters
OD
172mm
Length
1100mm
ID
71.4mm
Collar type
4A10/4A11
Operating temperature
Up to 150°C / 302°F
Pressure
120MPa
Rotation speed
0 to 255rpm
Gamma range
0 to 512API
Memory
64Mbit
Working time
≥200 hours
Vibration
 
Sine vibration:10g 50 to 200Hz
                       20g 30 to 200Hz
Random vibration:10grms,50 to 200Hz

 

Shock
 
Random vibration:10grms,50 to 200Hz
1000g,0.5ms

 

 

 

 

 

 

 

 

 

 

 


sinusoidal vibration Sine vibration:Random vibration: