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)

Similar Documents

Publication Publication Date Title
CA712921A (en) Dual-tube drill string for sample drilling
AU277526B2 (en) Dual-tube drill string for sample drilling
AU4761464A (en) Dual-tube drill string for sample drilling
CA936521A (en) Drill bit for explosive drilling
AU410508B1 (en) Drill rig
AU284823B2 (en) Drill rig
CA722509A (en) Drill bit
CA703853A (en) Borehole drilling
AU5722965A (en) Drill rig
AU294817B2 (en) Rock drill rods
AU289600B2 (en) Drive coupling for drill string
CA719595A (en) Rock drill
AU743766A (en) Drill rod for long hole drilling inthe ground
AU400640B2 (en) Method for drilling wells and similar boreholes
CA714951A (en) Percussion drill bit
CA773952A (en) Percussive drill bits
CA715416A (en) Rotary earth boring drill
CA709737A (en) Rock drilling device
AU1417866A (en) Earth drilling percussive units
AU6575869A (en) Lifting device for percussion drilling cuttings
CA703075A (en) Rock drilling apparatus
CA703074A (en) Rock drilling apparatus
CA812552A (en) Percussive unit for earth drilling
CA824444A (en) Percussive unit for earth drilling
AU6419765A (en) Rock drill rods