Steerable soil penetration system

Details Steerable soil penetration system Steerable soil penetration system

E - Fixed Constructions

21

B

E21B 7/26 (2006.01) E21B 7/06 (2006.01) E21B 7/20 (2006.01) E21B 7/30 (2006.01) E21B 17/20 (2006.01)

Patent

CA 2478442

A steerable soil penetration system comprises a steerable penetration head (1), which compacts and does not cut away the surrounding soil and which is connected to an elongate flexible tubing (2) such that the orientation of the penetration head can be varied relative to the tubing. The elongate tubing and/or a downhole hammer or tractor pushes the penetration head through the subsurface formation. Preferably the tubing is surrounded by a narrow annulus so that buckling of the tubing is inhibited and the tubing protects the pierced hole against caving in optionally the tubing is circumferentially expanded after completion of the piercing process thereby increasing the width of the pierced hole and providing a permanent hole lining.

L'invention porte sur un système orientable de pénétration du sol comportant une tête orientable de pénétration qui compacte le sol environnant sans le découper, et qui est reliée à un tube flexible allongé de manière à pouvoir en faire varier l'orientation par rapport au tube. La tête de pénétration progresse dans la formation de subsurface poussée par le tube et/ou par un marteau ou un tracteur de fond de puits. Le tube est de préférence entouré d'un annulus étroit en empêchant le flambage, tandis que le tube empêche le trou percé de s'effondrer. On peut facultativement dilater le tube après la pénétration pour qu'il constitue un gainage permanent du trou.

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