Mud-pulse MWD was designed to meet various needs of hole diameters, flow rates and other drilling requirements. The positive pulse system with minimum moving parts extends downhole life, simplifies maintenance and offers low resistance to flow ranges from 10 to 55L/s. The downhole assembly is modular, which ensures easy handling and maintenance. The probe power requirement is low, providing better operating economy and longer battery life. Its outer diameter is 48mm and suitable for all hole diameters.
The system consists of a downhole equipment and a surface equipment. The downhole equipment, which gathers and transmits data, composes Directional Probe, Pulser, Gamma Detector Probe and Battery Housing. Surface equipment is composes Power Supply Box, Remote Data Processor, Pressure Transducer, and Computer that perform data reception, processing, display and so on.

Specifications:
Inclination accuracy: ± 0.1°
Azimuth accuracy: ± 1.0°
Toolface accuracy: ± 1.0°
Max operating temperature: 150 deg C
Max pressure: 100MPa
Pressure barrel outer diameter: Φ 48mm
Natural Gamma:
Sensor: Scintillating crystal + Photoelectric multiplier
Recommended minimum sample period: 10 seconds
Measurement range: 0~500API
Measurement accuracy: ± 3API (0~150API)
± 10API (150~500API)
Max data storage capacity: 110, 000 groups
Sensitivity: Better than 1.6 CPS/API
Vertical resolution: Better than 130mm
Recommended measurement speed: ≤ 30 m/h
Total length of the system: 6.8m (without Gamma)
8.8m (with Gamma