Sleeved drill string coupling, especially for traversing a...

E - Fixed Constructions – 21 – B

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E21B 17/18 (2006.01) E21B 17/10 (2006.01) E21B 21/00 (2006.01) E21B 41/00 (2006.01)

Patent

CA 1241944

ABREGE DESCRIPTIF RACCORD DE GARNITURE DE FORAGE, NOTAMMENT POUR LA TRAVERSEE D'UNE ZONE A PERTE DE CIRCULATION Invention de: André DORLEANS Georges FERMAUD Société Anonyme dite: COMPAGNIE FRANCAISE DES PETROLES -0000000000- Raccord de garniture de forage, comprenant un corps alésé (1) muni d'un renflement central cylindrique (4) au sommet duquel on a pratiqué au moins trois évidements (12) pour y insérer des pièces rapportées amovibles (15, 17) munies d'un passage interne (21) dirigé de bas en haut et reliant l'alésage (5) à une duse (23) interchangeable montée dans ce passage et située sur un diamètre compris entre le diamètre extérieur du renflement central (4) et celui de la portion supérieure (2) du corps. Ce raccord convient notamment à la traversée d'une zone à perte de circulation. (Fig. 1)

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