Near-bit Measurement
BHA: MWD+LWD+NBM-Receiver+Motor+NBM-Transmitter+Bit
Features: Real-time GR image, near bit inclination offset=0.3m, GR&PWD offset=0.5m@top of Motor
| SIZE | HT-7”NBM-SYSTEM | HT-5%”NBM-SYSTEM |
| TOOL OD | 7”(178mm) | 5 1/4”(135mm) |
| HOLE SIZE | 8 3/8"-9 7/8" (214mm-251mm) |
6 1/2" (165mm) |
| LENGTH | 0.9m (RECEIVER) | |
| INC ACCURACY | +0.1° | |
| GR RANGE | 0-250cps | |
| BIT RPM | 30-300rpm | |
| CONNECTION | 4-1/2”REG | 3-1/2”REG |
| POWER | LITHIUM BATTERY | |
| MUD TYPE | OBM&WBM | |
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Data transmit by electomagnetic wave overlap mud motoer, max transmit distance 18cm
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Data transmit by electomagnetic wave overlap mud motoer, max transmit distance 18cm
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60° azimuth gamma scan sector, 6 nos of sector data recorded
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Smart drilling by self-identify&switch to slide or rotate drilling
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Max temperature: 150℃
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Application for well placement, geology indentification
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Run in both OBM and WBM
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Optional funcation of S&V, PWD for drilling optimization and well control
