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Pump apparatus comprising a base or chassis, a power unit and a reel assembly each operatively mounted to the base or chassis, a flexible conveyor conduit and flexible service line adapted to be payed out from the reel assembly and a work head including a pump operatively connected to the conveyor c

Pump apparatus comprising a base or chassis, a power unit and a reel assembly each operatively mounted to the base or chassis, a flexible conveyor conduit and flexible service line adapted to be payed out from the reel assembly and a work head including a pump operatively connected to the conveyor conduit. The work head comprises a pump having an outlet which is operatively connected to a conveying conduit, a support frame to which the pump is mounted and a powered traction drive assembly operatively mounted to the support frame. The reel assembly comprises a reel rotatably mounted to the base or chassis, a conveying conduit and a flexible service line, each being adapted to be wound thereon and payed out therefrom.

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1. A pump apparatus comprising a base or chassis, a power unit and a reel assembly each operatively mounted to the base or chassis, a flexible conveyor conduit and a flexible service line adapted to be payed out from the reel assembly and a work head, the work head suitable for use in the pump appar

1. A pump apparatus comprising a base or chassis, a power unit and a reel assembly each operatively mounted to the base or chassis, a flexible conveyor conduit and a flexible service line adapted to be payed out from the reel assembly and a work head, the work head suitable for use in the pump apparatus and being adapted to be payed out from the base or chassis for location at a work site, the work head comprising a submersible pump having an outlet which is operatively connected to the flexible conveyor conduit, a support frame, said pump being mounted within the support frame, and a powered traction drive assembly mounted to the support frame and configured to enable the work head to be maneuvered over a surface when in use, wherein the work head is operatively connected to the flexible conveyor conduit the traction drive assembly including two drive wheels each independently powered. 2. A pump apparatus according to claim 1, including a further flexible conveyor conduit adapted to be payed out from the reel assembly, and wherein the flexible conveyor conduits being a unitary body adapted to be wound on and payed out from the reel. 3. A pump apparatus according to claim 1, including one or more flexible lines adapted to be payed out from the reel assembly, and further comprising a guide device that includes spaced apart side wall members connected together to form a rigid frame structure, the frame structure having opposed open ends through which the flexible lines can pass, the side wall members flaring outwardly in the region of the openings. 4. The pump apparatus according to claim 3, further including a boom assembly, and wherein the guide device being operatively mounted to a free end of the boom assembly. 5. The pump apparatus according to claim 1, wherein each drive wheel has associated therewith a respective drive motor. 6. The pump apparatus according to claim 5, wherein said drive motors are hydraulic mounted to the support frame. 7. The pump apparatus according to claim 1, wherein the support frame is in the form of a cage structure for the pump being mounted within the cage structure. 8. The pump apparatus according to claim 7, wherein the cage structure is generally spherical in shape, the pump being mounted within the spherical shaped cage structure. 9. The pump apparatus according to claim 1, wherein said support frame comprises a front section, a rear section and opposed side sections arranged so as to provide an interior space, and wherein the pump being disposed within said interior space, at least one of the front or rear sections being substantially closed by a wall. 10. The pump apparatus according to claim 9, wherein both the front and rear sections of the support frame are substantially closed by the wall, the opposed side sections being substantially open. 11. The pump apparatus according to claim 1, further including a further flexible conveyor conduit, the flexible conveyor conduits being a unitary body adapted to be wound on and payed out from the reel, wherein the flexible service line comprises a plurality of hydraulic hoses disposed within the further flexible conveyor conduit. 12. The pump apparatus according to claim 11, wherein the flexible conveyor conduit and the further flexible conveyor conduit have a common side wall portion and are configured as a FIG. 8 when viewed in cross-section, and wherein the flexible conveyor conduit and further flexible conveyor conduit are arranged side-by-side when on the reel. 13. A pump apparatus comprising a base or chassis, a power unit and a reel assembly each operatively mounted to the base or chassis, a flexible conveyor conduit and a flexible service line adapted to be payed out from the reel assembly and a work head, the work head suitable for use in the pump apparatus and being adapted to be payed out from the base or chassis for location at a work site, the work head comprising a submersible pump having an outlet which is operatively connected to the flexible conveyor conduit, a support frame, said pump being mounted within the support frame, and a powered traction drive assembly mounted to the support frame and configured to enable the work head to be maneuvered over a surface when in use, wherein the work head is operatively connected to the flexible conveyor conduit, the pump apparatus further including a further flexible conveyor conduit, the flexible conveyor conduits being a unitary body adapted to be wound on and payed out from the reel, wherein the service line comprises a plurality of hydraulic hoses disposed within the further flexible conveyor conduit, the pump apparatus further including a guide device comprising spaced apart side wall members connected together to form a rigid frame structure, the frame structure having opposed open ends through which the flexible conveyor conduits can pass, the side wall members flaring outwardly in the region of the openings, and further including two sets of rollers configured so as to provide a travel path therebetween for the flexible lines between the open ends, one set of rollers being adapted to be driven, wherein each roller of the set of driven rollers is driven by a hydraulic motor, and wherein the two sets of rollers are configured so that the travel path is generally curved.