Cobble Presents Unusual Complications For Drilling

By Jeff Griffin, Senior Editor | December 2010 Vol. 65 No. 12

Vermeer offers several variations of reamers that are effective in cobble, from fluted cast-bodied reamers with oversized carbide tooling to gradual tapered reamers with less aggressive tooling. Vermeer also customizes reamers to the specific ground conditions, including cobble, to match machine, product and bore path. For larger-sized product, we suggest adding a long pipe extension welded to the reamer to bridge the gap from product to reamer. Cobble will tend to fall in between and create higher pulling forces, potentially locking swivel and product.

Ranger Field Services,(337) 837-5447,
Ditch Witch, (800) 654-6481,
Melfred Borzall, (800) 558-7500,
Vermeer Corp., (888) 837-6337,