CA521333A - Combined shut-in and back circulation tool - Google Patents

Combined shut-in and back circulation tool

Info

Publication number
CA521333A
CA521333A CA521333A CA521333DA CA521333A CA 521333 A CA521333 A CA 521333A CA 521333 A CA521333 A CA 521333A CA 521333D A CA521333D A CA 521333DA CA 521333 A CA521333 A CA 521333A
Authority
CA
Canada
Prior art keywords
circulation tool
back circulation
combined shut
shut
combined
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
CA521333A
Other languages
French (fr)
Inventor
O. Johnston Mordica
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.)
Johnston Testers Inc
Original Assignee
Johnston Testers Inc
Publication date
Application granted granted Critical
Publication of CA521333A publication Critical patent/CA521333A/en
Expired legal-status Critical Current

Links

CA521333A Combined shut-in and back circulation tool Expired CA521333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA521333T

Publications (1)

Publication Number Publication Date
CA521333A true CA521333A (en) 1956-01-31

Family

ID=35674554

Family Applications (1)

Application Number Title Priority Date Filing Date
CA521333A Expired CA521333A (en) Combined shut-in and back circulation tool

Country Status (1)

Country Link
CA (1) CA521333A (en)

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