EP 1058768 A1 20001213 - SAFETY SEAL FOR WELLS
Title (en)
SAFETY SEAL FOR WELLS
Title (de)
SICHERHEITSDICHTUNG FÜR BOHRLÖCHER
Title (fr)
JOINT DE SECURITE DESTINE A DES PUITS
Publication
Application
Priority
- SE 9900207 W 19990217
- SE 9800628 A 19980227
Abstract (en)
[origin: WO9943922A1] The invention relates to a safety seal for wells. In accordance with the invention the safety seal comprises, in combination, a lid (7) having a face turned towards the well hole wall, and a string (20) of a material that swells upon its contact with a liquid, which string is inserted in the gap between said wall and said lid face.
IPC 1-7
IPC 8 full level
E21B 33/03 (2006.01); F24J 3/08 (2006.01); E21B 33/00 (2006.01)
CPC (source: EP US)
E21B 33/03 (2013.01 - EP US); F24T 10/00 (2018.04 - EP US); F24T 10/10 (2018.04 - EP US); E21B 2200/01 (2020.05 - EP); F24T 10/30 (2018.04 - EP US); Y02E 10/10 (2013.01 - EP)
Citation (search report)
See references of WO 9943922A1
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB IT LI NL SE
DOCDB simple family (publication)
WO 9943922 A1 19990902; AU 2751899 A 19990915; EP 1058768 A1 20001213; NO 20004285 D0 20000825; NO 20004285 L 20000825; PL 342488 A1 20010604; SE 511806 C2 19991129; SE 9800628 D0 19980227; SE 9800628 L 19990828
DOCDB simple family (application)
SE 9900207 W 19990217; AU 2751899 A 19990217; EP 99907993 A 19990217; NO 20004285 A 20000825; PL 34248899 A 19990217; SE 9800628 A 19980227