Abrégé

A device (1) for ensuring continuous circulation in well drilling includes a tubular body (2), having an axial channel (2) with a lateral opening (3) which is closed by a removable plug (5). A tubular support (9) is placed in the axial conduit and supports a shut-off member (6) which is held in position by a retainer (14). The device (1) has an adjustment ring nut (50) which exerts a pressing action between the retainer (14) and the tubular support (9) to force the tubular support (9) in an axial limit-stop position against respective positioning and centering elements (11), to allow recovery of clearances during placement of the tubular support (9) and the valve (6) supported the tubular support inside the tubular body (2).

Classes IPC  ?

• E21B 19/16 - Branchement ou débranchement des accouplements de tubes ou de joints
• E21B 21/10 - Aménagements des vannes dans les systèmes de circulation des fluides de forage
• E21B 34/00 - Aménagements des vannes pour les trous de forage ou pour les puits

Abrégé

A method for drilling a well in continuous circulation and a device for intercepting and redistributing fluids for this drilling method wherein said device comprises a main chamber (5) communicating with a first auxiliary chamber (6) and with a second auxiliary chamber (7), in which during the direct drilling flow (F1) mode, said auxiliary chambers (6,7) are placed in fluid communication with each other.

Classes IPC  ?

• E21B 21/10 - Aménagements des vannes dans les systèmes de circulation des fluides de forage

Abrégé

A device (1) for ensuring continuous circulation in well drilling comprises a tubular body (2), having an axial channel (2) therein, with a lateral opening (3) closed by a removable plug (5). A tubular support (9) is placed in the axial conduit, and supports a shut-off member (6) which is held in position by retainer means (14). Advantageously, the device (1) comprises an adjustment ring nut (50) which exerts a pressing action between said retainer means (14) and said tubular support (9) to force said tubular support (9) in an axial limit-stop position against respective positioning and centering means (1 1), to thereby allow recovery of clearances during placement of said tubular support (9) and the valve means (6) supported thereby inside the tubular body (2).

Classes IPC  ?

• E21B 21/10 - Aménagements des vannes dans les systèmes de circulation des fluides de forage

Abrégé

A device for ensuring continuous circulation in well drilling comprises a tubular body having an axial channel therein, with a lateral opening closed by a removable plug. A flapper valve is placed in the tubular conduit, whose shut-off member is movable between a transverse position, in which it closes the axial channel, and a longitudinal position, in which it closes in a pressure-tight manner the lateral opening. Advantageously, the device comprises magnetic mechanism to operate on the shut-off member in the longitudinal position and retain it in the longitudinal position with a preset load, and as the latter is exceeded the shut-off member may be moved to the transverse position.

Classes IPC  ?

• E21B 34/14 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits actionnés par le mouvement des outils, p. ex. obturateurs à manchons actionnés par des pistons ou par des outils à câble
• E21B 21/10 - Aménagements des vannes dans les systèmes de circulation des fluides de forage
• E21B 23/02 - Appareils pour déplacer, mettre en place, verrouiller, libérer ou retirer, les outils, les packers ou autres éléments dans les trous de forage pour verrouiller les outils ou autres éléments sur des supports ou dans des retraits entre sections adjacentes du tubage
• E21B 34/06 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits
• E21B 34/00 - Aménagements des vannes pour les trous de forage ou pour les puits

Abrégé

A method for drilling a well in continuous circulation and a device for intercepting and redistributing fluids for this drilling method, comprising a main chamber (5) communicating with a first auxiliary chamber (6) and with a second auxiliary chamber (7), in which during the direct drilling flow (F1) mode, said auxiliary chambers (6,7) are placed in fluid communication with each other. In relation to the prior art, the device and the method of the invention offer the advantage of significantly reducing localized wear on the system for intercepting and redistributing the drilling fluid, through exploitation of auxiliary chambers that are placed in fluid communication with one another and that thereby make it possible to sustain even the high flow rates required for wells of larger dimensions and/or that use bottom hole equipment to impart rotation to the drill bit (normally hydraulic motors or turbines).

Classes IPC  ?

• E21B 21/10 - Aménagements des vannes dans les systèmes de circulation des fluides de forage

Abrégé

A device (1) for ensuring continuous circulation in well drilling comprises a tubular body (2), having an axial channel (2) therein, with a lateral opening (3) closed by a removable plug (5). A flapper valve is placed in the tubular conduit, whose shut-off member is movable between a transverse position, in which it closes said axial channel, and a longitudinal position, in which it closes in a pressure-tight manner said lateral opening (3). Advantageously, said device (1) comprises magnetic means (22) to operate on said shut-off member (6) in said longitudinal position and retain it in said longitudinal position with a preset load, and as the latter is exceeded said shut-off member (6) may be moved to said transverse position.

Classes IPC  ?

• E21B 21/10 - Aménagements des vannes dans les systèmes de circulation des fluides de forage
• E21B 23/02 - Appareils pour déplacer, mettre en place, verrouiller, libérer ou retirer, les outils, les packers ou autres éléments dans les trous de forage pour verrouiller les outils ou autres éléments sur des supports ou dans des retraits entre sections adjacentes du tubage
• E21B 34/06 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits
• F16L 37/00 - Accouplements du type à action rapide
• F16L 45/00 - Ensembles de tuyauteries avec ouvertures et fermetures de nettoyage
• E21B 34/00 - Aménagements des vannes pour les trous de forage ou pour les puits

Abrégé

A device (1) for ensuring continuous circulation in well drilling comprises a tubular body (2), having an axial channel (2) therein, with a lateral opening (3) closed by a removable plug (5). A tubular support (9) is placed in the axial conduit, and supports a shut- off member (6) which is held in position by retainer means. Advantageously, these retainer means comprise a plurality of cylindrical retainer elements (14), which are placed in the tubular conduit in circumferentially offset arrangement, near an upper head end (9a) of the tubular support (9), such that a first portion thereof engages a corresponding inner seat provided in the inner wall of the tubular conduit.

Classes IPC  ?

• F16L 37/00 - Accouplements du type à action rapide
• F16L 45/00 - Ensembles de tuyauteries avec ouvertures et fermetures de nettoyage
• E21B 21/10 - Aménagements des vannes dans les systèmes de circulation des fluides de forage
• E21B 34/06 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits
• E21B 23/02 - Appareils pour déplacer, mettre en place, verrouiller, libérer ou retirer, les outils, les packers ou autres éléments dans les trous de forage pour verrouiller les outils ou autres éléments sur des supports ou dans des retraits entre sections adjacentes du tubage