Title (en)

PROCESS FOR INCREASING THE WATER DISCHARGE OF WATER DELIVERING DRILLED WELLS.

Title (de)

VERFAHREN ZUR ERHÖHUNG DER WASSERAUSBEUTE IN WASSERBOHRSCHÄCHTEN.

Title (fr)

PROCEDE D'AUGMENTATION DU REFOULEMENT D'EAU DE PUITS DE PRODUCTION D'EAU.

Publication

EP 0097149 A4 19850606 (DE)

Application

EP 82900127 A 19811223

Priority

HU 8100049 W 19811223

Abstract (en)

[origin: WO8302296A1] Process for increasing the water discharge of water delivering drilled wells, which can be characterized in that into the filter section of the well weak acids with a dissociation constant being less, than Kd = 10<-3> are introduced. Afer a dwelling period of longer duration, expediently 10 to 48 hours, as well as compressing, flushing is performed by means of a scavenging pump. Thereafter the solution of sodium bicarbonate and/or sodium hypochlorite is introduced into the filter section. After a longer dwelling period, expediently one to thirty-six hours, flushing is performed by means of the scavenging pump. As weak acids with a dissociation constant being less than Kd = 10<-3> acetic acid, tartaric acid, citric acid, metaboric and/or tetraboric acid is used.

IPC 1-7

E03B 3/15

IPC 8 full level

E03B 3/15 (2006.01); B01D 29/62 (2006.01); C09K 8/528 (2006.01); E03B 3/32 (2006.01)

CPC (source: EP US)

B01D 29/62 (2013.01 - EP US); C09K 8/528 (2013.01 - EP US)

Citation (search report)

• [A] US 3556221 A 19710119 - HAWS GERALD W, et al
• [A] US 3441085 A 19690429 - GIDLEY JOHN L
• [A] US 4325433 A 19820420 - YEN TEH FU, et al
• [A] US 3122503 A 19640225 - KATZER MELVIN F
• [A] US 2425415 A 19470812 - BOND DONALD C, et al

Designated contracting state (EPC)

AT DE FR GB LU NL

DOCDB simple family (publication)

WO 8302296 A1 19830707; BR 8109052 A 19831122; EP 0097149 A1 19840104; EP 0097149 A4 19850606; JP S59500323 A 19840301; US 4541488 A 19850917

DOCDB simple family (application)

HU 8100049 W 19811223; BR 8109052 A 19811223; EP 82900127 A 19811223; JP 50020982 A 19811223; US 55213583 A 19831014