Global Patent Index - EP 1058768 A1

EP 1058768 A1 2000-12-13 - 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

EP 1058768 A1 (EN)

Application

EP 99907993 A

Priority

  • SE 9900207 W
  • SE 9800628 A

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 (main, further and additional classification)

E21B 33/03

IPC 8 full level (invention and additional information)

E21B 33/03 (2006.01); F24J 3/08 (2006.01); E21B 33/00 (2006.01)

CPC (invention and additional information)

E21B 33/03 (2013.01); F24J 3/08 (2013.01); E21B 2033/005 (2013.01); Y02E 10/10 (2013.01)

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

EPO simple patent family

WO 9943922 A1 19990902; AU 2751899 A 19990915; EP 1058768 A1 20001213; NO 20004285 A 20000825; NO 20004285 D0 20000825; PL 342488 A1 20010604; SE 511806 C2 19991129; SE 9800628 D0 19980227; SE 9800628 L 19990828

INPADOC legal status


2002-03-20 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20010901

2000-12-13 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000816

2000-12-13 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH DE DK ES FI FR GB IT LI NL SE