EP 0429512 A4 19920624 - SAFETY SWITCH FOR EXPLOSIVE WELL TOOLS
Title (en)
SAFETY SWITCH FOR EXPLOSIVE WELL TOOLS
Publication
Application
Priority
US 23134288 A 19880812
Abstract (en)
[origin: WO9001610A1] In accordance with illustrative embodiments of the present invention as disclosed herein, a safety switch (13) for preventing accidental firing of an explosive well tool includes a tubular metal body (22) connected between the cable head (14) and the well tool, a conductor wire (48) extending through such body for carrying current from the cable to the well tool, and a contact plug (36) mounted in a side opening (33) in the body and arranged to be selectively advanced into shorting contact with the conductor wire.
IPC 1-7
IPC 8 full level
E21B 43/1185 (2006.01); F42D 1/045 (2006.01)
CPC (source: EP)
E21B 43/1185 (2013.01); F42D 1/045 (2013.01)
Citation (search report)
- [Y] US 4291623 A 19810929 - ROBINSON RALPH L, et al
- [YD] US 4523650 A 19850618 - SEHNERT STEVEN D [US], et al
- [A] US 3183972 A 19650518 - FREDD JOHN V
- [A] US 4561356 A 19851231 - BORDON ERNESTO E [US]
- [A] US 4011815 A 19770315 - GARCIA JOSE B
- See references of WO 9001610A1
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
WO 9001610 A1 19900222; AU 4070889 A 19900305; CA 1323896 C 19931102; EP 0429512 A1 19910605; EP 0429512 A4 19920624
DOCDB simple family (application)
US 8903414 W 19890808; AU 4070889 A 19890808; CA 608081 A 19890811; EP 89909501 A 19890808