Melfred-Borzall, Inc.

Jeff Griffin, Senior Editor

Cobble -- usually rounded pieces of rock that can range in size from a marble to a basketball -- is considered one of the most difficult and challenging soil conditions for making a directional drilling installation.

“Cobble is not fun,” said Boyd Simon, P.E., field services division manager for Ranger Directional Drilling.

The Ogre stacked plate reamer performs in hard soil conditions including shale, sandstone, caliches and cobbles.

The new 4 ¼-inch Eagle Claw is designed for hard, rocky soil conditions.
A unique, balanced cutting design improves cutting efficiency.

The Ogre stacked plate reamer is made for hard soil conditions including shale, sandstone, caliches and cobbles.

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