MEASUREMENT WHILE DRILLING SYSTEM
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China [CN] LUHAI MWD system is equipped with international brand of directional sensor and gamma sensor, use US patented well depth measurement technique and exclusive rotary joint design which make our system outstanding in oil and gas drilling industry. It has the unique structure of dropping prevent system allow the down hole parts can be fishing during sticking.
Measurement Parameters：
● Inclination
● Azimuth
● Gravity Tool Face
● Magnetic Tool Face
● Gravity Sum
● Magnetic Field Sum
● Temperature
● Natural Gamma
● Directional Gamma
MWD System Specification & Features:
1.Work Environment Parameters：
Pulser: positive pulse, key type
Size of non-magnetic drill collar: 89mm ～ 229mm(3.5”～9”)
Mud displacement: 10---55L/S
Mud density:1g/cm³ ～ 2.1g/cm³(7.5ppg～18ppg)
Sand content : <2%
Working temperature of instrument under the shaft:-30℃～ +150℃
Diameter of instrument:Φ48mm andΦ38mm
Pressure resistance of instrument under the shaft: max 135MPa(20000PSI)
2.Measurement Accuracy and Range of Directional Probe:
Measurement accuracy of inclination: ±0.1° range: 0-180
Measurement accuracy of azimuth: ±1° range: 0-360
Measurement accuracy of gravity tool face: ±1° range: 0-360
Measurement accuracy of magnetic tool face: ±1° range: 0-360
3.Measurement Accuracy and Range of Gamma Probe:
Measurement range: 0-1000API
Sensitivity: 2/API
Measurement accuracy: ±2%
Resolution ratio: 173mm (6.8”) (thin well, 8”hole, 50%)
Vibration (3 axles):30g, 50-300Hz
Compact: 500g, 0.5mS axle Z
1000g, 0.5mS axle X and Y
4.Measurement Accuracy and Range of Directional Gamma:
Measurement range: 0-1500API
Sensitivity: 0.65CPS per API
Measurement accuracy: ±2%
Resolution ratio of thin layer: 8.8” (thin well, 8”hole, 50%)
Vibration (3 axles): 20g, 50-1500Hz
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