NO162578C - REMOVABLE INTERNAL DRILL SAFETY VALVE DEVICE. - Google Patents

REMOVABLE INTERNAL DRILL SAFETY VALVE DEVICE.

Info

Publication number
NO162578C
NO162578C NO842319A NO842319A NO162578C NO 162578 C NO162578 C NO 162578C NO 842319 A NO842319 A NO 842319A NO 842319 A NO842319 A NO 842319A NO 162578 C NO162578 C NO 162578C
Authority
NO
Norway
Prior art keywords
valve device
safety valve
removable internal
internal drill
drill safety
Prior art date
Application number
NO842319A
Other languages
Norwegian (no)
Other versions
NO162578B (en
NO842319L (en
Inventor
Joseph Puntar
B J Parham
Original Assignee
Hydril Co
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 US06/433,862 external-priority patent/US4478279A/en
Application filed by Hydril Co filed Critical Hydril Co
Publication of NO842319L publication Critical patent/NO842319L/en
Publication of NO162578B publication Critical patent/NO162578B/en
Publication of NO162578C publication Critical patent/NO162578C/en

Links

NO842319A 1982-10-12 1984-06-08 REMOVABLE INTERNAL DRILL SAFETY VALVE DEVICE. NO162578C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/433,862 US4478279A (en) 1982-10-12 1982-10-12 Retrievable inside blowout preventer valve apparatus
PCT/US1983/001581 WO1984001600A1 (en) 1982-10-12 1983-10-12 Retrievable inside blowout preventer valve apparatus

Publications (3)

Publication Number Publication Date
NO842319L NO842319L (en) 1984-06-08
NO162578B NO162578B (en) 1989-10-09
NO162578C true NO162578C (en) 1990-01-17

Family

ID=26768646

Family Applications (1)

Application Number Title Priority Date Filing Date
NO842319A NO162578C (en) 1982-10-12 1984-06-08 REMOVABLE INTERNAL DRILL SAFETY VALVE DEVICE.

Country Status (2)

Country Link
BR (1) BR8307568A (en)
NO (1) NO162578C (en)

Also Published As

Publication number Publication date
BR8307568A (en) 1984-08-28
NO162578B (en) 1989-10-09
NO842319L (en) 1984-06-08

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