EP 1205629 A2 20020515 - Method and device for securing an oil well in the event of a defect in the hydraulic control line of its downhole safety valve
Title (en)
Method and device for securing an oil well in the event of a defect in the hydraulic control line of its downhole safety valve
Title (de)
Verfahren und Vorrichtung zur Wiederherstellung der Sicherheit einer Ölbohrung im Falle eines Defekts der hydraulischen Steuerleitung des Im-Loch-Sicherheitsventils
Title (fr)
Moyens pour la remise en securite d'un puits petrolier en cas de defaut de la ligne de commande hydraulique de sa vanne de securite de fond
Publication
Application
Priority
- EP 96916205 A 19960515
- FR 9506628 A 19950530
Abstract (en)
Safety process for an oil well of the type comprises a production pipe (1), a bottom safety valve called the origin valve (6) which is mounted in a sleeve (5) in the production pipe, and a hydraulic control line outside the production pipe, called the origin control line (4), supplying fluid under pressure to the valve and a fluid inlet through the sleeve to open at the valve. This process is to ensure the safety of the well if the origin control line fails. The origin valve is replaced by a special bottom valve containing hydraulic connectors along its axis on its top part, means of isolating or sealing closed the origin control line at its periphery and a movable blocking device at the bottom part closed by a fluid under pressure arriving axially via a hydraulic connection. A new hydraulic control line, called the concentric control line, is installed inside the production pipe and along its axis, and this line is connected to the special valve. Also the equipment (special valve, airlock, control line, tools) to operate this process.
Abstract (fr)
L'invention concerne des moyens pour la remise en sécurité d'un puits pétrolier en cas de défaut de la ligne de commande hydraulique (4) de sa vanne de sécurité de fond. Selon l'invention, on remplace la vanne d'origine par une vanne de fond spéciale (15) de remise en sécurité, on installe à l'intérieur du tube de production (1) une nouvelle ligne de commande hydraulique (16) et on raccorde hydrauliquement ladite ligne à la vanne spéciale de remise en sécurité. La nouvelle vanne de sécurité est donc commandée par une ligne de commande interne au tube de production (1), la ligne d'origine (4) étant désaffectée. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 34/10 (2006.01)
CPC (source: EP)
E21B 34/10 (2013.01); E21B 34/105 (2013.01)
Designated contracting state (EPC)
FR GB IT NL
DOCDB simple family (publication)
WO 9638651 A2 19961205; WO 9638651 A3 19970123; AU 5904296 A 19961218; EP 0854967 A2 19980729; EP 0854967 B1 20020814; EP 1205629 A2 20020515; EP 1205629 A3 20030129; FR 2734863 A1 19961206; FR 2734863 B1 19970829; OA 10544 A 20020529
DOCDB simple family (application)
FR 9600733 W 19960515; AU 5904296 A 19960515; EP 02075433 A 19960515; EP 96916205 A 19960515; FR 9506628 A 19950530; OA 70144 A 19971128