Casing tube with casing shoe

Details Casing tube with casing shoe Casing tube with casing shoe

E - Fixed Constructions

21

B

E21B 17/14 (2006.01) E21B 7/20 (2006.01) E21B 17/00 (2006.01)

Patent

CA 2188291

Casing tube with casing shoe for use at drilling in earth layers or rock by means of impact drilling comprising a casing shoe (5) of metal and a casing tube (4) of plastic. The casing shoe is provided with threads (31), groove (33) or flanges which lock the casing shoe (5) to the casing tube to create a unit. The casing shoe is provided with a tube-formed extension (32) in order to protect the casing tube from damages from drill cuttings.

Tube de cuvelage doté d'un sabot de tubage destiné à être utilisé pour le forage à percussion dans des couches de terre ou de la roche. Ledit tube comporte un sabot de tubage (5) métallique et un tube de cuvelage (4) en plastique. Le sabot de tubage présente des filets (31), une rainure (33) ou des rebords qui bloquent ce dernier sur le tube de cuvelage de manière à former une unité. Le sabot de tubage est doté d'une extension tubulaire (32) destinée à empêcher que le tube de cuvelage ne soit endommagé par les copeaux de forage.

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