BlackStar EM-MWD
Downhole Tool 2005 Specifications
Sensor Specifications
| Parameter | Range | Resolution | Accuracy |
|---|---|---|---|
| Inclination | 0 - 180° | 0.05° | +/- 0.2° |
| Azimuth | 0 - 360° | 0.18° | +/- 1.0° |
| Tool Face | 0 - 360° | 0.18° | +/- 1.5° |
| Dip Angle | 0 - +/-90° | 0.1° | +/- 0.2° |
| Mag Field | 0 – 70,000 gamma | 100 | +/- 200> |
| Gamma Ray | 2000 cps | 1 cps | +/- 1 |
| Annular Pressure | 0 - 15,000 psi | 1 to 8 psi depending upon Selected full-scale range (6.89 to 55.15 kPa) | 1% Selected FSR |
| Temperature | -20 - 150°C (-4 - 302°F) | 0.07°C (1°F) | +/- 1.0° |
| Total Vibration | 0 – 50 g rms | 0.01 g rms | +/- 0.5 g rms |
General Tool Specifications
| Length | 26.75 ft. (8.1534 meters) |
|---|---|
| Size | 1.875" OD (0.5715 meters) |
| Pressure rating | 20,000 psi (137,895 kPa) |
| Power | Lithium Battery; 80 to 130 operating hours depending upon borehole conditions and transmitter power selection |
| Operating Temperature | Low Temp Battery Assy: -20°C to +85°C |
| High Temp Battery Assy: -20°C to +150°C | |
| Downhole Data Storage | Up to 144 hours of Gamma, Annular Pressure, Total Vibration, and Temperature stored at 1-minute intervals. |
Operating Specifications and Limits
| Data Transmission | |
|---|---|
| Type | Low frequency electromagnetic waves |
| Operating Frequency | Field Programmable, 2 Hz to 12 Hz |
| Data Rates | 1, 1.5, 2, 2.4, 4, 4.8, and 6 Bits per Second |
| Transmitted Parameters | Field Programmable |
| Data Update Rates | 18 sec @ 1 baud: 3 sec @ 6 baud |
| Formation Parameters | |
|---|---|
| Formation Resistivity | 3 ohm/meters to 1000 ohm/meters depending upon Formation Strata, and Borehole Conditions |
| EM Signal Modeling | EM signal modeling program available for pre-job planning |
| Environmental - All Tools | |
|---|---|
| Shock | Operating - 1000 g, .05 msec, ½ sine |
| Survival - 2000 g, .05 msec, ½ sine | |
| Vibration | Operating: |
| Sine Vibration – 15 g peak, 50 to 800 Hz | |
| Random Vibration – 10 grms maximum | |
| Vibration Survival: | |
| Sine Vibration – 30 g peak, 50 to 800 Hz | |
| Random Vibration – 20 grms maximum | |
| System Size | Pressure Drop @ Max.Flow Rate with 8 lb mud |
|---|---|
| 3.75” (95mm) OD X 2.3125” (58.7 mm) ID | 180psi (1241kPa) @ 160 gpm (0.60m3/min) |
| 4.75” (121mm) OD X 2.6875” (68.3 mm) ID | 76psi (524kPa) @ 370 gpm (1.40m3/min) |
| 6.50” (165mm) OD X 3.250” (82.6 mm) ID | 39psi (269kPa) @ 700 gpm (2.65m3/min) |
| 8.00” (203mm) OD X 4.00 “ (101.6 mm) ID | 21psi (145kPa) @ 1200 gpm (4.54m3/min) |
| System Size | Hole Size | Max Dog Leg - Degree/100 ft (Degree/ 30m) | |
|---|---|---|---|
| Sliding | Rotating | ||
| 3.75” OD (95mm) | 4.750" to 5.875” ID (121 to 149mm) | 60 | 20 |
| 4.75” OD (121mm) | 5.875” to 7.875" ID (149 to 200mm) | 28 | 12 |
| 6.50” OD (165mm) | 7.500” to 9.875” ID (191 to 251mm) | 20 | 10 |
| 8.00” OD (203mm) | 9.875” to 12.50” ID (251 to 311mm) | 12 | 7 |
| Mud or Fluid Parameters | |
|---|---|
| Conventional Drilling | Mud Flow Rate: Maximum dependent on NMDC ID, Fluid velocity flowing past tool not to exceed 40 ft/sec (12 m/sec) Mud Sand Content: Maximum 0.5% for continuous operation at maximum flow rate/higher content tolerable at low flow rates |
| Underbalanced/Air Drilling | Minimum fluid injection rates: 30 gpm (114 l/min) |
| Computer Requirements: | |
|---|---|
Windows NT, 2000 or XP |
Serial port (DB9 connection) |