EP 0403538 A4 19910522 - PROCESS FOR TREATMENT OF DRILLING MUD
Title (en)
PROCESS FOR TREATMENT OF DRILLING MUD
Publication
Application
Priority
US 16532488 A 19880308
Abstract (en)
[origin: GB2215364A] Used drilling muds containing substantial quantities or organic liquids and water-soluble salts are treated to render them environmentally acceptable for disposal purposes, by drying the muds to evaporate all liquids, aqueous and non-aqueous, preferably in a drying section (14) comprising drying tubes (20, 21, 22, 23) through which they are conveyed and held in suspension by screw conveyors (27, 28, 20, 30), and preferably with the vapors thus generated flowing in a direction counter-current to the mud. Water-soluble salts are removed from the dried mud components by dissolving with water, and the vapors are condensed and phase separated for further purification and re-use if desired.
IPC 1-7
IPC 8 full level
B01D 3/10 (2006.01); E21B 21/06 (2006.01); F26B 17/20 (2006.01); F26B 25/00 (2006.01)
CPC (source: EP)
B01D 3/10 (2013.01); E21B 21/063 (2013.01); F26B 17/205 (2013.01); F26B 25/006 (2013.01)
Citation (search report)
- [A] US 2259210 A 19411014 - ANDRE MODAVE
- [A] DE 68313 C 18930429
- [A] GB 192165 A 19230129 - ALFRED DANGERFIELD, et al
- [A] DE 23591 C 18830903
- [A] US 3909958 A 19751007 - CASTANOLI ALDER F
- See references of WO 8908487A1
Designated contracting state (EPC)
BE CH DE FR LI NL SE
DOCDB simple family (publication)
GB 2215364 A 19890920; GB 2215364 B 19920401; GB 8824924 D0 19881130; DK 215190 A 19901107; DK 215190 D0 19900907; EP 0403538 A1 19901227; EP 0403538 A4 19910522; FI 904431 A0 19900907; WO 8908487 A1 19890921
DOCDB simple family (application)
GB 8824924 A 19881025; DK 215190 A 19900907; EP 89903612 A 19890301; FI 904431 A 19900907; US 8900819 W 19890301