CA969170A - Drilling system - Google Patents

Drilling system

Info

Publication number
CA969170A
CA969170A CA209,869A CA209869A CA969170A CA 969170 A CA969170 A CA 969170A CA 209869 A CA209869 A CA 209869A CA 969170 A CA969170 A CA 969170A
Authority
CA
Canada
Prior art keywords
drilling system
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
CA209,869A
Inventor
William F. Bates
Andre M. Rossfelder
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.)
Tetra Tech Inc
Original Assignee
Tetra Tech Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CA119,429A external-priority patent/CA969169A/en
Application filed by Tetra Tech Inc filed Critical Tetra Tech Inc
Priority to CA209,869A priority Critical patent/CA969170A/en
Application granted granted Critical
Publication of CA969170A publication Critical patent/CA969170A/en
Expired legal-status Critical Current

Links

CA209,869A 1971-07-29 1974-09-24 Drilling system Expired CA969170A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA209,869A CA969170A (en) 1971-07-29 1974-09-24 Drilling system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA119,429A CA969169A (en) 1971-07-29 1971-07-29 Drilling system
CA209,869A CA969170A (en) 1971-07-29 1974-09-24 Drilling system

Publications (1)

Publication Number Publication Date
CA969170A true CA969170A (en) 1975-06-10

Family

ID=25666864

Family Applications (1)

Application Number Title Priority Date Filing Date
CA209,869A Expired CA969170A (en) 1971-07-29 1974-09-24 Drilling system

Country Status (1)

Country Link
CA (1) CA969170A (en)

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