Improved shoe

Details Improved shoe Improved shoe

E - Fixed Constructions

21

B

E21B 17/14 (2006.01)

Patent

CA 2557513

A tubing shoe (10) for use on work strings in well bores as are typically utilised in oil and gas production. The shoe comprises a cylindrical body (12) upon which is arranged a reaming portion (22) including pairs of teardrop shaped raised reaming members (26), each pair being mounted oppositely, in parallel and longitudinally along the body. Adjacent pairs of members provide a funnel (42) for collecting approaching debris and a channel for grinding the debris. A nose (14) may be mounted on the end of the shoe, the nose being eccentric or including cutting blades to assist the shoe in breaking through shale and clay stone bridges. A non-aggressive stabiliser (54) in the form of helically arranged blades may also be located on shoe.

L'invention concerne un sabot de tubage (10) à utiliser sur des colonnes de tubage de puits de forage typiquement utilisés pour produire du pétrole et du gaz. Ce sabot comprend un corps cylindrique (12) sur lequel est agencée une partie d'alésage (22) comprenant une paire d'éléments d'alésage en relief en forme de goutte (26), chaque paire étant montée de manière opposée, en parallèle, et longitudinalement le long du corps. Les paires d'éléments adjacentes constituent un entonnoir (42) pour recueillir des débris qui s'en approchent, et un canal pour broyer ces débris. Un nez (14) peut être monté sur l'extrémité du sabot, ce nez étant excentrique ou comprenant des aubes coupantes pour aider le sabot à casser des ponts de schiste argileux et d'argilite. Un stabilisateur non agressif (54) se présentant sous la forme d'aubes agencées en hélice peut également être placé dans le sabot.

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