Methods and apparatus for wireline drilling on coiled tubing

E - Fixed Constructions – 21 – B

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Details

E21B 21/10 (2006.01) E21B 4/04 (2006.01) E21B 4/18 (2006.01) E21B 17/20 (2006.01)

Patent

CA 2655245

Apparatus for drilling an underground borehole, comprising: - a tubular conveyance system (18) including an electric cable and a supply of drilling fluid, the supply of drilling fluid being arranged in use to pump fluid from the surface down the inside of the tubular conveyance (18) so as to return to the surface via the annulus between the outside of the tubular conveyance (18) and the borehole; - a drilling system (20) comprising an electrically powered pump (28) and a drilling motor (22), the pump (28) being arranged in use to pump fluid from the borehole outside the drilling system (20) up through the inside of the drilling system (20); - a connector (30) connecting the drilling system (20) to the tubular conveyance system (18), through which the pump (28) and motor (22) are connected to the electric cable, and - a flow diverter at which flow down the inside of the tubular conveyance system (18) is diverted into the annulus, and flow up the inside of the drilling system (20) is diverted into the annulus.

Appareil pour forer un trou souterrain, comprenant: - un système de transport tubulaire (18) comprenant un câble électrique et une alimentation de fluide de forage, l'alimentation de fluide de forage étant conçue pour, une fois en service, pomper un fluide à partir de la surface jusqu'à l'intérieur du transport tubulaire (18) de manière à retourner à la surface par l'intermédiaire de l'espace annulaire formé entre l'extérieur du transport tubulaire (18) et le trou; - un système de forage (20) comprenant une pompe électrique (28) et un moteur de forage (22), la pompe (28) étant conçue pour, une fois en service, pomper un fluide à partir de le trou à l'extérieur du système de forage (20) jusqu'à l'intérieur du système de forage (20); - un connecteur (30) pour relier le système de forage (20) au système de transport tubulaire (18), par l'intermédiaire duquel la pompe (28) et le moteur (22) sont connectés au câble électrique, et - un déviateur d'écoulement auquel l'écoulement descendant en provenance de l'intérieur du système de transport tubulaire (18) est dévié dans l'espace annulaire, et où l'écoulement ascendant jusqu'à l'intérieur du système de forage (20) est dévié dans l'espace annulaire.

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