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churn drill |
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churn drill [′chərn ‚dril] (mechanical engineering) Portable drilling equipment, with drilling performed by a heavy string of tools tipped with a blunt-edge chisel bit suspended from a flexible cable, to which a reciprocating motion is imparted by its suspension from an oscillating beam or sheave, causing the bit to be raised and dropped. Also known as American system drill; cable-system drill. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Phase 1 is a Banka or Churn drill program to delineate the extent and nature of the gravels at an estimated cost of US$350,000. A total of twelve (12) large diameter churn drill holes, aggregating up to 500 meters total length have been recommended. A total of twelve (12) large diameter churn drill holes, aggregating up to 500 meters total length have been recommended. |
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