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Referenced by

Citing PatentFiling dateIssue dateOriginal AssigneeTitle
US39332091 Mar 197420 Jan 1976Tigre Tierra, Inc.Drilling apparatus and technique using down-hole motor
US39454441 Apr 197523 Mar 1976The Anaconda CompanySplit bit casing drill
US39905247 May 19759 Nov 1976Tigre Tierra, Inc.Down-the-hole motor for rotary drill rod and process for drilling using the same
US40022137 May 197511 Jan 1977Tigre Tierra, Inc.Down-the-hole motor for rotary drill rod and process for drilling using the same
US418341520 Nov 197815 Jan 1980Stenuick FranceDrilling apparatus
US419678311 Jul 19788 Apr 1980Lofs Verkstads ABDevice for boring
US42968217 Feb 198027 Oct 1981Drilling rig and conversion apparatus
US440866924 Apr 197811 Oct 1983Sandvik AktiebolagMeans for drilling
US441504724 Nov 198015 Nov 1983Downhole case driving apparatus for impact drills
US454544310 Jun 19838 Oct 1985Sandvik AktiebolagMeans for drilling
US485267215 Aug 19881 Aug 1989Drill apparatus having a primary drill and a pilot drill
US49798482 Nov 198925 Dec 1990Drilling device
US53559667 Jul 199318 Oct 1994Drilling method and an assembly for performing the method
US550322414 Feb 19952 Apr 1996Big Iron Drilling Ltd.Casing drive apparatus
US58395198 Nov 199624 Nov 1998Sandvik ABMethods and apparatus for attaching a casing to a drill bit in overburden drilling equipment
US610620012 May 199922 Aug 2000Techmo Entwicklungs-und Vertriebs GmbH
ALWAG" Tunnelausbau Gesellschaft m.b.H.
Process and device for simultaneously drilling and lining a hole
US66759198 Nov 200113 Jan 2004Frank's Casing Crew and Rental Tools, Inc.Tubular piling apparatus and method
US75203438 Feb 200521 Apr 2009Tesco CorporationRetrievable center bit