Method of removing a downhole casing

A method and apparatus for removing a downhole casing from a well using a downhole tool assembly 30a having a spear tool 40a, cutting device 36a, and a pull tool 42a having through-rotation capability. The through-rotation capability of the pull tool allows the cutting device to be operated by rotat...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Steffen Evertsen, Steffen Hansen, Eirik Enerstvedt, Arnstein Wathne, Frode Sunde, Edwin Rooyakkers
Format: Patent
Sprache:eng
Schlagworte:
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Beschreibung
Zusammenfassung:A method and apparatus for removing a downhole casing from a well using a downhole tool assembly 30a having a spear tool 40a, cutting device 36a, and a pull tool 42a having through-rotation capability. The through-rotation capability of the pull tool allows the cutting device to be operated by rotating an inner body of the pull tool. The through-rotation may result from the pull tool having an outer body 52 and an inner body or mandrel 54, and a rotational mechanism 50. The pull tool may have a piston member. Also disclosed is an apparatus wherein a downhole motor is used to operate the cutter.