A new drilling method—Earthworm-like vibration drilling
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DOI: 10.1371/journal.pone.0194582
Abstract: The load transfer difficulty caused by borehole wall friction severely limits the penetration rate and extended-reach limit of complex structural wells. A new friction reduction technology termed “earthworm-like drilling” is proposed in this paper to… read more here.
Keywords: earthworm like; vibration drilling; load transfer;