Foot valve assembly for a down hole drill
作者： Jing James Yao , Timothy J. Plunkett , Paul Campbell , Dale R. Wolfer , H. Dell Ii William
DOI:
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摘要: A retaining assembly for a cylindrical member and support sleeve in the bore of component DTH. The may, example, be foot valve insertion into counter bit. has rigidity at least portion greater than rigidity. gap is provided between deforms gap, resulting being fixedly sandwiched bore.
lens.org 参考文章(24)
Joseph R. Ditzig, Down hole drill improvement ,(1988)
Leland H. Lyon, Ernest C. Hinck, Device for removing debris from a drillhole ,(1991)
Leland H. Lyon, Apparatus for positioning a split retaining ring in a down-hole percussive drill ,(1994)
Leland H. Lyon, Dale R. Wolfer, Self-lubricating, fluid-actuated, percussive down-the-hole drill ,(1995)
David Llewellyn Mallis, Double flex seal for tubular connection ,(2001)
Warren T. Lay, Leland H. Lyon, Reversible casing for a down-the-hole percussive apparatus. ,(1994)
Leland H. Lyon, Fluid distributor device for down-hole-drills ,(2002)
Leland H. Lyon, Dale R. Wolfer, Piston for a self-lubricating, fluid-actuated, percussive down-the-hole drill ,(1995)
Warren T. Lay, Backhead and check valve for down-hole drills ,(1999)
Hiroshi K.K. Somic Ishikawa Hamamatsu-Kojo Kato, Method of manufacturing ball joint and housing for the ball joint ,(2000)