Whether you have a tough or sensitive working environment, we have the ability to get in, provide the energy, and move out with minimal impact (no pun intended!)…

Weight Drop Products

Accelerated weight drop products at their best!

Click the model numbers below to view the spec sheet
A100 A200 AF450 AF750

The Accelerated Weight Drop System is the cornerstone of United Service Alliance’s commitment to giving the customer what they want and need. Designed with the field crew in mind, all models are easy to use, easy to maneuver and easy to service.

We have recently successfully completed the design, manufacture, and testing of a new family of AWD’s, which produce higher energy output in a smaller, safer, and more robust package!

Electronics are supplied by Seismic Source Co.


  • Patented Nitrogen Spring Technology (Patent 7284636, other US and International patents pending)
  • Mechanically Reliable — Significant Reduction in Down Time
  • State-of-the-Art Design and Manufacturing — Science teamed with expert Craftsmanship
  • Unparalleled Power — Highest cocking forces in the industry!
  • Versatile — Mounts on Trucks, Trailers, Buggies or Rubber Track Crawlers
  • Systems for Every Application

United Service Alliance manufactures a proprietary line of accelerated weight drop energy sources for oil and gas exploration for use in any environment or those that are prohibitive using conventional sources, bridging the gap between dynamite and Vibroseis™ in an environmentally sensitive nature.