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UNDERWATER
VIBROCORING
 
SELECTING A VIBROCORER
 
CORETUBES,
LINERS, & CORE
RETENSION
 
BUOYANT-FRAME
vs RIGID FRAME
 
SPECIFICATIONS
 
OPERATIONS
FURTHER NOTES
 
 

BUOYANT FRAME AND RIGID FRAME

All our vibrocorers can operate in shallow water, less than 20 meters, without the Buoyant-Frame system as long as the vessel remains stationary. Our patented well-received Buoyant-Frame mode arrangement is a very efficient and easy way to deploy the vibrocorers in deeper water where the vessel is free-anchored allowing the vibrocore to penetrate the sediment with a vertical coretube.

In some cases the vibrocorer's have been deployed in a custom built Rigid Frame system, however these rigid frames have proven to be problematic, very large and heavy so we no longer provide such systems. We can, however, provide advice for the design and discuss the problematic issues that must be overcome if customers decide to fabricate such a system for themselves.

With the Buoyant-Frame, the Vibrocorer is maintained in proper vertical position by two guidelines held taut between a Float Package and a Weightstand. The larger Weightstand is provided with ballast boxes so the easy-to-find ballasting material such as lead bags or scrap metal can be used in the field. For deployment, the Vibrocorer is lowered with the Weightstand hanging on its guidelines form the Vibrohead. The Float Package is hooked-up to the guidelines when the Vibrohead reaches the deck level. After coring and pull-out, the system is retrieved in the reverse way. In case of limited deck space or overhead clearance, or to further accelerated the procedure at sea, the Weightstand can be left in as overboard cradle.
TAINTED SAMPLES FORM IRON RUST, LUBRICANTS. GREASES, OR CUTTING FLUIDS?
Because our vibrocorers are 100% electrical with no external moving parts, they do not require any lubricants. The system is completely constructed from high grade aluminum and then anodized so there is no iron or lead associated with the system. Vibrocoring does not produce any waste cuttings requiring disposal. In fact, the boring hole usually collapses when the coretube is extracted.
 
PO Box 1030,
Poway CA 92074-1030
Phone: 858-679-7361