DE194764C - - Google Patents

Info

Publication number
DE194764C
DE194764C DENDAT194764D DE194764DA DE194764C DE 194764 C DE194764 C DE 194764C DE NDAT194764 D DENDAT194764 D DE NDAT194764D DE 194764D A DE194764D A DE 194764DA DE 194764 C DE194764 C DE 194764C
Authority
DE
Grant status
Grant
Patent type
Application number
DENDAT194764D

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/26Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/32Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
DENDAT194764D DE194764C (en)

Publications (1)

Publication Number Publication Date
DE194764C true DE194764C (en)

Family

ID=457873

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT194764D DE194764C (en)

Country Status (1)

Country Link
DE (1) DE194764C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126065A (en) * 1964-03-24 Chadderdon
US5791409A (en) * 1996-09-09 1998-08-11 Baker Hughes Incorporated Hydro-mechanical multi-string cutter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126065A (en) * 1964-03-24 Chadderdon
US5791409A (en) * 1996-09-09 1998-08-11 Baker Hughes Incorporated Hydro-mechanical multi-string cutter