CA712921A - Dual-tube drill string for sample drilling - Google Patents

Dual-tube drill string for sample drilling

Info

Publication number
CA712921A
CA712921A CA712921A CA712921DA CA712921A CA 712921 A CA712921 A CA 712921A CA 712921 A CA712921 A CA 712921A CA 712921D A CA712921D A CA 712921DA CA 712921 A CA712921 A CA 712921A
Authority
CA
Canada
Prior art keywords
dual
drill string
sample drilling
tube drill
tube
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
CA712921A
Inventor
G. Hunt Lawrence
A. Wilmeth Howard
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.)
Kennecott Corp
Original Assignee
Kennecott Copper Corp
Publication date
Application granted granted Critical
Publication of CA712921A publication Critical patent/CA712921A/en
Expired legal-status Critical Current

Links

CA712921A Dual-tube drill string for sample drilling Expired CA712921A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA712921T

Publications (1)

Publication Number Publication Date
CA712921A true CA712921A (en) 1965-07-06

Family

ID=36042209

Family Applications (1)

Application Number Title Priority Date Filing Date
CA712921A Expired CA712921A (en) Dual-tube drill string for sample drilling

Country Status (1)

Country Link
CA (1) CA712921A (en)

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