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Advantages of double-wall drill pipe
Release time:
2019-11-04
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double wall drill pipeConducive to drilling through complex formations, The circulation of compressed air in a double-walled drill pipe is like a closed-circuit system., Even if you encounter an old hole or cave, Once the drill reaches the bottom of the hole, Normal circulation will be restored immediately., This is not possible in regular drilling methods.
In addition, The double-wall drill pipe is full-hole drilling tool, Small hole wall clearance, Therefore, there is no spatial condition for the collapse of the broken rock block., The double-wall drill pipe has a certain supporting effect on the hole wall. and the continuity of the drilling process, It avoids the damage to the borehole caused by the pressure excitation and suction caused by the frequent lifting of the drilling tool.
good drill quality.The double-wall drill pipe is full-hole drilling tool, Good rigidity, Therefore, hole inclination rarely occurs.; Double-wall drill pipe sizing specifications are consistent, Hole depth measurement error will not occur; Regardless of formation conditions, The sample taking rate is always at or near100%, There is no external pollution.
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