CA640807A - Thermal rock piercing method and apparatus - Google Patents

Thermal rock piercing method and apparatus

Info

Publication number
CA640807A
CA640807A CA640807A CA640807DA CA640807A CA 640807 A CA640807 A CA 640807A CA 640807 A CA640807 A CA 640807A CA 640807D A CA640807D A CA 640807DA CA 640807 A CA640807 A CA 640807A
Authority
CA
Canada
Prior art keywords
piercing method
thermal rock
rock piercing
thermal
rock
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
CA640807A
Inventor
B. Aitchison Robert
H. Smith George
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.)
Union Carbide Corp
Original Assignee
Union Carbide and Carbon Corp
Publication date
Application granted granted Critical
Publication of CA640807A publication Critical patent/CA640807A/en
Expired legal-status Critical Current

Links

CA640807A Thermal rock piercing method and apparatus Expired CA640807A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA640807T

Publications (1)

Publication Number Publication Date
CA640807A true CA640807A (en) 1962-05-08

Family

ID=35919323

Family Applications (1)

Application Number Title Priority Date Filing Date
CA640807A Expired CA640807A (en) Thermal rock piercing method and apparatus

Country Status (1)

Country Link
CA (1) CA640807A (en)

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