A propulsion unit for a wellbore tool includes a tool body and at least one wheel section disposed along the tool body. The wheel section comprises a tractor pad movably coupled to a tractor housing coupled to the tool body. The tractor pad is movable only in a lateral direction with respect to the tool body. A wheel rotatably is supported in the tractor pad so as to contact a wall of a wellbore when the tractor pad is moved away from the tractor housing. An hydraulic motor is rotationally coupled to the wheel. The hydraulic motor comprises a displacement changing element operable to change displacement of the hydraulic motor. The unit comprises means for moving the tractor pad between an extended position and a retracted position.


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    Titel :

    PROPULSION UNIT FOR WELLBORE TRACTOR TOOL


    Erscheinungsdatum :

    07.04.2021


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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