Core drill assembly with adjustable total flow area and...

Details Core drill assembly with adjustable total flow area and... Core drill assembly with adjustable total flow area and...

E - Fixed Constructions

21

B

E21B 10/02 (2006.01) E21B 10/60 (2006.01) E21B 25/00 (2006.01)

Patent

CA 2652563

A core drill assembly with replaceable cutting fluid nozzles permitting effective total flow area adjustment (TFA), substantial optimization of hydraulic force at the cutting face to improve rate of penetration (ROP) and core quality. At least one seal assembly to restrict drilling fluid flow while permitting mutual rotation between the core head ID and the lower shoe is disposed in an annulus defined therebetween.

Ensemble carottier à duses de fluide de coupe remplaçables permettant un réglage efficace de la surface d'écoulement totale (TFA) et une optimisation de la force hydraulique exercée au niveau de la face de coupe dans le but d'améliorer le taux de pénétration (ROP) et la qualité des carottes. Au moins un ensemble d'étanchéité servant à limiter l'écoulement du fluide de coupe tout en permettant la rotation mutuelle de la tête de carottage ID et du sabot inférieur est disposé dans un espace annulaire formé entre eux.

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