technical specs
TARGET DHS GYRO
Performance accuracy 3D probe location (vs. start point) 5 to 10 ft./1000 ft. 1)
Inclination : 0.1°
Azimuth : 0.5°,
0.5°
Roll/Gyro : tool face 0.5°
Position : <0,15 % distance travelled (2s)
Temperature range
Operating : -20 °C to +125 °C (without heat shield)
Storage : -34 °C to +125 °C
Surface calibration and alignment
Run-up time : = 15 sec
Alignment time : = 5 min
Calibration time : Max. 60 min (offside Borehole)
Down hole travel
Angular rate : = 120°/s
Velocity : = 600 ft/min
Cable length : Max. 30,000 ft. (10 km)
Cable resistance : Max. 600 O
Continuous operation : = 10 hours
Physical characteristics
Physical size INS : 1.75 inches (75 mm) diameter x 7 ft. (1,8 m) without
centralizers
Physical size surface
module :
19” sub module, L × W × H: 6.7” (17 cm) × 21 TE × 3 HE
Pressure rating : 15,000 PSI (1034 bar)
INS shock, non-operating : 500 g, halfsine, 5 msec, each axis
INS vibration, operating : 20 g rms random, 5 to 500 Hz
INS geodetic latitude,
operating :
-70° (southern hemisphere) to +70° (northern hemisphere)
Cable Head plug : “GO” type single conductor receptical
Centralizer : Roller wheel expanding type. Upper-feed thru with “GO"
receptical. Lower- to accept 1 1/4 -8 shock absorber or mule
shoe orienting alignment shock absorber
Swivel Head : Feed thru type swivel with “GO" receptical swivel torque 5 to 7
inches/lb.
Inertial Sensor
Length : 68.33 inches
Outside : diameter 1¾ inches
Volume : 214.6 cu inches
Weight : 41 lb
Power and power consumption
Input voltage : 90 V AC to 240 V AC, 50 to 60 Hz
Output voltage : 300 VAC ± 10 %, short circuit proof, to IMU probe thru up to
30,000 ft. of single conductor 5/16” diameter, double armor
cable
INS Power : 20 to 37 W
Communication capabilty
RS232 format, up to 9600 baud rate to send and receive data over 30,000 ft. max. of
single- or multiconductor armor cable
Sub-surface computer
Analizes and computes all subsurface electronics, including temperature compensation and
calibration of inertial grade sensors
Output Data :
– Operating mode, status, quality and accuracy parameters
– Attitude angles
– Cable length
– Horizontal and vertical position co-ordinates
– Body-fixed accelerations and angular rates |
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Target DHS Gyro
