STEPPER PULSER
Modulate the flow of drilling fluid with the Compass Stepper Pulser. This power efficient system provides more than 420 downhole hours and offers the widest flow range in the industry for any MWD Pulser (35gpm – 1100 gpm).
Ideal for high-gpm whipstock fluctuations without any damage to the pulser. Pulse real-time M/LWD data without any delay to enhance reservoir understanding, target well placement and maximize production
Compass Stepper Pulser is comprised of 3 main sections: Pulser Driver, Oil Fill, and Helix End
Compass Stepper Pulser allows mud-flow to be restricted creating a positive pulse pressure differential in standpipe pressure. It features strong signal amplitude and advanced noise cancellation processing, allowing clear detection at greater depths without interference
STEPPER PULSER SPECIFICATIONS
| Min Flow Rate | 35 gpm (2.2 L/sec) in water |
| Max Flow Rate | 1,100 gpm (69 L/sec) in water |
| Max Operating Temperature | 175° C (350° F) |
| Max Hydrostatic Pressure | 20,000 psi (137.9 MPa)F) |
| Operating Voltage | 20–29V |
| Nominal Current | 4mA |
| Shock | 1,000 g / 0.5 millisecond |
| Vibration |
25g RMS 30-500 Hz random 30g 50-300 Hz Sine |
| Mud Sand Content | <1% recommended |
| Poppet Push Force | 60-280 lbs |
STEPPER DRIVER SPECIFICATIONS
| Inputs |
Power: 18-30VDC Pulse: 0–5VDC |
|
| Outputs | Flow Switch: 0-5VDC | |
| Pulse Mode Limit | 2A | |
| Non-Pulsing Mode (quiescent) | 4mA | |
| Power Consumption |
300-350 hours of continuous pulsing per 29V Lithium Battery Stick |
|
| Poppet Closing Force | 60–280 lbs | |
|
Length and Weight w/o Signal Shaft |
64.5 in (1,638 mm) / 34 lbs (15.4 kg) | |
|
Length and Weight w/ Signal Shaft |
86.25 in (2,190 mm) / 44 lbs (19.9 kg) | |
| Housing Diameter | 1.875" is standard, but can be built in 1.75" | |
| Housing Material | BeCu | |
| Temperature Rating | -40 to 175°C Functional; 185°C Survivable | |
| Pressure Rating | 20,000 psi | |
