SEMWD-2000
System Description of SEMWD-2000
The system is made up of downhole tools and surface equipment. The downhole tools connected in the drilling-string can measure directional parameters and GR parameters, then send them to the surface. The waves are caught by the Surface Receiver. After amplification, de-noising and digital data acquisition, the data can be recovered, displayed and recorded by the computer, the directional parameters are displayed on the driller's monitor.
Application Area of SEMWD-2000
- MWD of gas drilling and mixed medium drilling wells.
- Vertical drilling control.
- MWD of shallow formations and coal seam gas wells.
- Horizontal wells and directional wells that suitable for electromagnetic wave transferring.
Parameters Measured:
Well deviation, azimuth, tool face, temperature, GR, resistivity, annular pressure, etc.
Technical Specifications of SEMWD-2000
Measure range and accuracy:
Deviation: 0~180° ±0.2°
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OD: 48mm
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Azimuth: 0~360° ±1.5°
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Drill Collar OD: 4.75”, 6.5”, 7”
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Tool face: 0~360° ±1.5°
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Carrier wave: 2Hz~12.5Hz
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GR: 0~500API ±7%
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Baud rate: 0.5~6.25 bit/s
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Temperature: -25~125℃
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Formation resistivity: 2~1000Ω·m
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Pressure: 105MPa
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Continues working time: 200h
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