Reaming and stabilisation tool for use in a borehole

Details Reaming and stabilisation tool for use in a borehole Reaming and stabilisation tool for use in a borehole

E - Fixed Constructions

21

B

E21B 10/32 (2006.01)

Patent

CA 2568909

The inventive enlarging and stabilising tool for a borehole comprises a tubular body (1) provided with an axial cavity (2), circumferentially arranged receptacles provided with an outward opening, a knife element (4) disposed in each receptacle and comprising at least two cutting arms (5, 6) which are displaceable between the retracted and extended positions, a drive means (15) mounted inside the tubular body in an axially offset manner with respect to the knife elements and transmission means for transmitting the drive means motion to the pivotable cutting arms, wherein said cutting arms form a space (14) outwardly closed in the extended position thereof therebetween and the tool tubular body.

Outil d'élargissement et de stabilisation à mettre en oeuvre dans un trou de forage, comprenant un corps tubulaire (1) présentant une cavité axiale (2) et, périphériquement, des logements pourvus d'une ouverture vers l'extérieur, un élément de couteau (4) logé dans chaque logement susdit, comportant au moins deux bras de coupe (5, 6) déplaçables entre une position de retrait et une position d'extension, un moyen moteur (15) agencé à l'intérieur du corps tubulaire de manière axialement décalée par rapport aux éléments de couteau et des moyens de transmission capables de transmettre le mouvement du moyen moteur aux bras de coupe articulés, ces bras de coupe formant entre eux et le corps tubulaire de l'outil un espace fermé (14) vis-à-vis de l'extérieur en position d'extension des bras de coupe.

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