Abrégé

A bottom hole assembly (BHA) and method for drilling a bore with a pneumatic percussion hammer includes an expandable packer surrounding the stem rod connected to the hammer. The packer has an inner surface confronting the outer surface of the stem rod in an axially slideable, sealed relationship. The packer is expanded and fixed in the bore to separate a region of high hydraulic pressure above the packer from a region of lower hydraulic pressure below the packer. The method includes operating the pneumatic hammer and bit, while (i) the stem rod advances with a sliding seal against an inside surface of the expanded packer; (ii) pneumatic pressurization and exhaust for the hammer are guided within the stem rod; and (iii) the exhaust from the hammer is discharged into the lower clearance region surrounding the bit at the bottom of the bore.

Classes IPC  ?

• E21B 21/12 - Procédés ou appareils pour nettoyer les trous de forage par jet de fluide, p. ex. en utilisant l'air d'échappement du moteur utilisant des tubes de forage comprenant plusieurs passages pour les fluides, p. ex. systèmes en circuit fermé
• E21B 33/12 - PackersBouchons
• E21B 4/14 - Marteaux commandés par fluide
• E21B 17/18 - Tubes comprenant plusieurs passages pour les fluides
• E21B 17/20 - Tubes de forage flexibles ou articulés

Abrégé

A bottom hole assembly (BHA) and method for drilling a bore with a pneumatic percussion hammer includes an expandable packer surrounding the stem rod connected to the hammer. The packer has an inner surface confronting the outer surface of the stem rod in an axially slideable, sealed relationship. The packer is expanded and fixed in the bore to separate a region of high hydraulic pressure above the packer from a region of lower hydraulic pressure below the packer. The method includes operating the pneumatic hammer and bit, while (i) the stem rod advances with a sliding seal against an inside surface of the expanded packer; (ii) pneumatic pressurization and exhaust for the hammer are guided within the stem rod; and (iii) the exhaust from the hammer is discharged into the lower clearance region surrounding the bit at the bottom of the bore.

Classes IPC  ?

• E21B 4/14 - Marteaux commandés par fluide
• E21B 17/18 - Tubes comprenant plusieurs passages pour les fluides
• E21B 17/20 - Tubes de forage flexibles ou articulés
• E21B 21/12 - Procédés ou appareils pour nettoyer les trous de forage par jet de fluide, p. ex. en utilisant l'air d'échappement du moteur utilisant des tubes de forage comprenant plusieurs passages pour les fluides, p. ex. systèmes en circuit fermé
• E21B 33/12 - PackersBouchons

Abrégé

A bottom hole assembly (BHA) and method for drilling a bore with a pneumatic percussion hammer includes an expandable packer surrounding the stem rod connected to the hammer. The packer has an inner surface confronting the outer surface of the stem rod in an axially slideable, sealed relationship. The packer is expanded and fixed in the bore to separate a region of high hydraulic pressure above the packer from a region of lower hydraulic pressure below the packer. The method includes operating the pneumatic hammer and bit, while (i) the stem rod advances with a sliding seal against an inside surface of the expanded packer; (ii) pneumatic pressurization and exhaust for the hammer are guided within the stem rod; and (iii) the exhaust from the hammer is discharged into the lower clearance region surrounding the bit at the bottom of the bore.

Classes IPC  ?

• E21B 4/14 - Marteaux commandés par fluide
• E21B 21/12 - Procédés ou appareils pour nettoyer les trous de forage par jet de fluide, p. ex. en utilisant l'air d'échappement du moteur utilisant des tubes de forage comprenant plusieurs passages pour les fluides, p. ex. systèmes en circuit fermé
• E21B 33/128 - PackersBouchons avec un organe dilaté radialement par pression axiale
• E21B 33/129 - PackersBouchons à patins mécaniques pour accrochage dans le tubage
• E21B 21/10 - Aménagements des vannes dans les systèmes de circulation des fluides de forage
• E21B 17/18 - Tubes comprenant plusieurs passages pour les fluides
• E21B 33/12 - PackersBouchons
• E21B 10/38 - Trépans à percussion caractérisés par des canaux ou des buses pour les fluides de forage
• E21B 17/10 - Protecteurs contre l'usureDispositifs de centrage

Abrégé

A bit retention system for a hammer drill including a housing (41), a drive sub (44) connected to lower end of the housing, and a bit retainer (50) having an upper end suspendable from a shoulder of the drive sub and a lower end including a radially inwardly projecting bit retention rim (52). The upper end of a locking sleeve (70) has internal features (78) that are engageable with external features (76) at the lower end of the housing to prevent relative rotation, and a lower end sized (82) to overlap the upper end (90) of the retainer. The lower end of the locking sleeve is welded to the retainer, thus locking the threads on the drive sub from unscrewing from housing threads. The drive sub and retaining member are pinned together to stop separate rotation.

Classes IPC  ?

• E21B 10/36 - Trépans à percussion
• E21B 17/043 - AccouplementsJoints entre tige et trépan, ou entre tiges filetés avec moyens de verrouillage
• E21B 12/00 - Accessoires pour outils de forage
• E21B 4/06 - Moyens de percussion mis en œuvre au fond du trou, p. ex. marteaux

Produits et services

Pneumatic down hole hammers

Produits et services

Drill bits for pneumatic down hole hammers

Produits et services

VALVELESS PNEUMATIC DOWN HOLE HAMMERS

Produits et services

Down-Hole Water, Oil and Gas Drilling Equipment-Namely, Bits, Hammers, Rotary Drill Pipe, Adaptors, and Parts Thereof