EP 0457879 B1 19940824 - DEVICE AND METHOD FOR CLEANING AN UNDERGROUND WELL.
Title (en)
DEVICE AND METHOD FOR CLEANING AN UNDERGROUND WELL.
Title (de)
VORRICHTUNG UND VERFAHREN ZUR REINIGUNG EINES UNTERIRDISCHEN BOHRLOCHES.
Title (fr)
DISPOSITIF ET PROCEDE DE NETTOYAGE D'UN PUITS SOUTERRAIN.
Publication
Application
Priority
- FR 8916346 A 19891211
- FR 9000895 W 19901210
Abstract (en)
[origin: WO9109205A1] Method for cleaning a vertical, deviated or horizontal underground well. A maintenance pipe (1-7) is lowered through the production column (10), which maintenance pipe has at its end a cleaning head (7) for suction of sediments to be extracted; at a certain level (L) above the region of the well to be cleaned, a hydraulic separation of the ring comprised between the maintenance pipe (1-7) and the production column (10) is effected, and a motor fluid is injected in the ring in order to operate a hydroinjector (3) which causes the suction through the maintenance pipe (1-7) of sediments to be extracted, the hydraulic separation isolating the overpressure ring (LH) from the bottom of the well in depression. Application to the oil industry and well drillings.
IPC 1-7
IPC 8 full level
E21B 37/00 (2006.01)
CPC (source: EP US)
E21B 37/00 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
FR 2655684 A1 19910614; FR 2655684 B1 19950922; AT E110438 T1 19940915; DE 69011850 D1 19940929; DK 0457879 T3 19941219; EP 0457879 A1 19911127; EP 0457879 B1 19940824; NO 301728 B1 19971201; NO 913111 D0 19910809; NO 913111 L 19911010; OA 09390 A 19920915; US 5158140 A 19921027; WO 9109205 A1 19910627
DOCDB simple family (application)
FR 8916346 A 19891211; AT 91900837 T 19901210; DE 69011850 T 19901210; DK 91900837 T 19901210; EP 91900837 A 19901210; FR 9000895 W 19901210; NO 913111 A 19910809; OA 60061 A 19910809; US 76843591 A 19910926