CA766641A - Raise drilling method and mechanism - Google Patents

Raise drilling method and mechanism

Info

Publication number
CA766641A
CA766641A CA766641A CA766641DA CA766641A CA 766641 A CA766641 A CA 766641A CA 766641 A CA766641 A CA 766641A CA 766641D A CA766641D A CA 766641DA CA 766641 A CA766641 A CA 766641A
Authority
CA
Canada
Prior art keywords
drilling method
raise drilling
raise
drilling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA766641A
Inventor
J. Robbins Richard
K. Mccurdy Dean
E. Cannon Robert
F. Winberg Douglas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JAMES S ROBBINS AND ASSOCIATES
Original Assignee
JAMES S ROBBINS AND ASSOCIATES
Publication date
Application granted granted Critical
Publication of CA766641A publication Critical patent/CA766641A/en
Expired legal-status Critical Current

Links

CA766641A Raise drilling method and mechanism Expired CA766641A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA766641T

Publications (1)

Publication Number Publication Date
CA766641A true CA766641A (en) 1967-09-05

Family

ID=36210053

Family Applications (1)

Application Number Title Priority Date Filing Date
CA766641A Expired CA766641A (en) Raise drilling method and mechanism

Country Status (1)

Country Link
CA (1) CA766641A (en)

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