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AssigneeNETZSCH Pumpen & Systeme GmbH
InventorsKlaus Heizinger, Lorenz Lessmann, Eudes Borchardt, Leoncio Del Pozo
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A pump system and a method for pumping viscous or partially viscous media out of a borehole. The pump system includes a well pipe which is installed in the borehole and a motor which is coupled to an eccentric screw pump, the eccentric screw pump including one or more stators and one or more rotors which are received in the stator(s) so as to rotate eccentrically. One or more connection mechanisms are also provided, by means of which the eccentric screw pump is fixed in the well pipe in a force-fitting and/or formfitting manner. For the purpose of removing the eccentric screw pump from the borehole, the eccentric screw pump is held by means of the one or more connection mechanisms with an axial freedom of movement.
A pump system for delivering viscous or partially viscous media from a borehole, comprising a well pipe installed in the borehole, a riser and a motor, which is coupled with an eccentric screw pump, wherein the eccentric screw pump comprises one or more stators and one or more rotors accommodated rotating eccentrically in the stator or stators, as well as one or more connecting means, by means of which the eccentric screw pump is fixed in the well pipe in a friction-locked and/or form-fit manner, characterised in that the eccentric screw pump is held with an axial freedom of movement by one or more connecting means for the purpose of its removal from the borehole.
A method for removing an eccentric screw pump out of a well pipe installed in a borehole, which eccentric screw pump comprises one or more stators and one or more rotors accommodated rotating eccentrically in the stator or stators, and is fixed in the well pipe by means of one or more connecting means, characterised in that the one or more connecting means continuously permit an axial movement of the eccentric screw pump in the direction of a borehole opening and the eccentric screw pump is lifted out of the borehole by a pulling motion orientated in the direction of the borehole opening.
Dependencies are inferred from the claim text.