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Can cause crushing or necking down of the drill pipe tube. the drill pipe can also be damaged by allowing the slips to ride the pipe on trips out of the hole. good rig practices will help eliminate time consuming trips in the future, looking for washouts or fishing for drill pipe lost in the hole. for more information refer to the iadc drilling ...

Dth drilling rod we have mines, water wells, ground source heat pumps, down-the-hole drill pipes and casing for city foundation pit anchorage, etc. our drilling …

> drill rod and other drilling tools about us we have our own r&d team and more than 30 years experience in drilling industry. high quality raw material and advanced productive technology, rigorous testing method to make sure of high performance and quality products.

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