EP 0550569 B1 19970820 - VALVE CONTROL APPARATUS
Title (en)
VALVE CONTROL APPARATUS
Title (de)
VENTILKONTROLLGERÄT
Title (fr)
APPAREIL DE COMMANDE DE SOUPAPES
Publication
Application
Priority
- GB 9101679 W 19910930
- GB 9021488 A 19901003
Abstract (en)
[origin: CA2093331A1] 2093331 9206270 PCTABS00011 The present invention provides a novel valve arrangement that enables the opening and closing of the test string circulation valve, and - when the valve is closed - the opening and closing of the tubing isolating valve, as many times as desired. To attain this end a number of arrangement are employed: 1) the use of a J-slot indexer to control the operation of a tool, the slot being in the form of two closed loop tracks (one laying within the other, with a common part), the two tracks controlling two different tool mode operations; 2) the operation of a multimode tool by a succession of annulus pressure pulses, wherein an initial operation is effected by pressure changes of a first pulse, and the operation following the subsequent pressure change is effected slowly so that, if a second pulse occurs within a given time (from the preceding pulse), the mode of the tool is altered and a third pulse thereafter causes a different operation to be initiated; 3) the use of two separate J-slot indexers, each in the form of a closed loop track, to control tool operation, one J-slot indexer controlling the movement of a first operating member connected to and driving a second operating member the movement of which is controlled by the other J-slot indexer.
[origin: CA2093331A1] The present invention provides a novel valve arrangement that enables the opening and closing of the test string circulation valve, and - when the valve is closed - the opening and closing of the tubing isolating valve, as many times as desired. To attain this end a number of arrangement are em- ployed: 1) the use of a 3-slot indexer to control the operation of a tool, t he slot being in the form of two closed loop tracks (one laying within the othe r, with a common part), the two tracks controlling two different tool mode op- erations; 2) the operation of a multimode tool by a succession of annulus pressure pulses, wherein an initial operation is effected by pressure change s of a first pulse, and the operation following the subsequent pressure change is effected slowly so that, if a second pulse occurs within a given time (fr om the preceding pulse), the mode of the tool is altered and a third pulse thereof- ter causes a different operation to be initiated; 3) the use of two separate J- slot indexers, each in the form of a closed loop track, to control tool oper a- tion, one J-slot indexer controlling the movement of a first operating membe r connected to and driving a second operating member the movement of which is controlled by the other J-slot indexer.
IPC 1-7
IPC 8 full level
E21B 23/00 (2006.01); E21B 34/10 (2006.01)
CPC (source: EP)
E21B 23/006 (2013.01); E21B 34/108 (2013.01)
Designated contracting state (EPC)
DE FR NL
DOCDB simple family (publication)
WO 9206270 A2 19920416; WO 9206270 A3 19920806; CA 2093331 A1 19920404; CA 2093331 C 20010828; DE 69127370 D1 19970925; EP 0550569 A1 19930714; EP 0550569 B1 19970820; GB 2248465 A 19920408; GB 2248465 B 19941207; GB 9021488 D0 19901114; GB 9120751 D0 19911113; NO 306876 B1 20000103; NO 931274 D0 19930402; NO 931274 L 19930601
DOCDB simple family (application)
GB 9101679 W 19910930; CA 2093331 A 19910930; DE 69127370 T 19910930; EP 91917222 A 19910930; GB 9021488 A 19901003; GB 9120751 A 19910930; NO 931274 A 19930402