Method of creating a borehole in an earth formation

Details Method of creating a borehole in an earth formation Method of creating a borehole in an earth formation

E - Fixed Constructions

21

B

E21B 43/10 (2006.01) E21B 7/20 (2006.01) E21B 29/00 (2006.01)

Patent

CA 2523348

A method of creating a borehole in an earth formation is provided. The method comprises the steps of drilling a section of the borehole and lowering an expandable tubular element into the borehole whereby a lower portion of the tubular element extends into the drilled borehole section, radially expanding said lower portion of the tubular element so as to form a casing in the drilled borehole section, and separating an upper portion of the tubular element from said lower portion so as to allow the separated upper portion to be moved relative to said lower portion.

L'invention concerne un procédé pour réaliser un trou de forage dans une formation, ce procédé comprenant les opérations suivantes : forer une section du trou et y descendre un élément tubulaire extensible en faisant pénétrer une partie inférieure de cet élément tubulaire dans la section du trou forée, étendre radialement la partie inférieure de l'élément tubulaire de façon à former un cuvelage dans la section du trou forée, séparer une partie supérieure de l'élément tubulaire de ladite partie inférieure afin de permettre le déplacement de cette partie supérieure relativement à la partie inférieure.

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