Coiled tubing drilling system

Details Coiled tubing drilling system Coiled tubing drilling system

E - Fixed Constructions

21

B

E21B 7/04 (2006.01) E21B 7/08 (2006.01)

Patent

CA 2614679

A drilling rig for drilling an underground borehole (5) into a seam (4) uses coiled metal tubing (8) fed by a tractor unit (11) from a drum (7) to provide a thrust force to a drilling head. The drilling head has a bent-sub assembly giving an angle of deviation which is controlled by rotating the coiled metal tubing in the borehole by way of rotation of the drum (7) in the frame (12) about the axis of the tube in the borehole (5).

La présente invention concerne une installation de forage pour forer un trou de mine souterrain (5) dans une couche (4) utilisant des tubes métalliques spiralés (8) alimentés par une unité de traction (11) depuis un tambour (7) pour impartir une force de poussée à une tête de forage. La tête de forage présente un ensemble patin d~usure produisant un angle de déviation qui est contrôlé par rotation des tubes métalliques spiralés dans le trou de mine à l~aide de la rotation du tambour (7) dans le cadre (12) autour de l~axe du tube dans le trou de mine (5).

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