EP 0605562 B1 19970122 - APPARATUS AND METHOD FOR REMOVING DRILLHOLE DEBRIS
Title (en)
APPARATUS AND METHOD FOR REMOVING DRILLHOLE DEBRIS
Title (de)
VORRICHTUNG UND VERFAHREN ZUM ENTFERNEN VON BOHRLOCHABFALL
Title (fr)
APPAREIL ET PROCEDE PERMETTANT DE RETIRER LES DEBRIS D'UN TROU DE FORAGE
Publication
Application
Priority
- US 9207821 W 19920916
- US 76686691 A 19910927
- US 76686791 A 19910927
Abstract (en)
[origin: WO9306334A1] A device (3) and method for removing debris from a drillhole (1), includes positioning a separator adjacent to a down-the-hole percussive drillhead, for removing water and other matter from the percussive fluid prior to the percussive fluid entering the drillhead. The water and other matter are ejected into the drillhole to remove the debris, and backflow of debris and water into the separator and drillhead is prevented, during periods when the percussive fluid flow ceases.
IPC 1-7
IPC 8 full level
E21B 4/14 (2006.01); E21B 21/00 (2006.01); E21B 21/10 (2006.01); E21B 21/14 (2006.01)
CPC (source: EP KR)
E21B 4/14 (2013.01 - EP); E21B 21/00 (2013.01 - KR); E21B 21/002 (2013.01 - EP); E21B 21/103 (2013.01 - EP); E21B 21/14 (2013.01 - EP)
Designated contracting state (EPC)
DE GB SE
DOCDB simple family (publication)
WO 9306334 A1 19930401; AU 2656492 A 19930427; AU 666500 B2 19960215; CA 2119249 A1 19930401; CN 1029700 C 19950906; CN 1072988 A 19930609; DE 69217072 D1 19970306; DE 69217072 T2 19970612; EP 0605562 A1 19940713; EP 0605562 B1 19970122; JP H07502086 A 19950302; KR 940702580 A 19940820
DOCDB simple family (application)
US 9207821 W 19920916; AU 2656492 A 19920916; CA 2119249 A 19920916; CN 92111084 A 19920826; DE 69217072 T 19920916; EP 92920320 A 19920916; JP 50618993 A 19920916; KR 19940700983 A 19940326