EP3077677B1 - Pompe de prélèvement d'eaux souterraines - Google Patents

Pompe de prélèvement d'eaux souterraines Download PDF

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Publication number
EP3077677B1
EP3077677B1 EP14867021.9A EP14867021A EP3077677B1 EP 3077677 B1 EP3077677 B1 EP 3077677B1 EP 14867021 A EP14867021 A EP 14867021A EP 3077677 B1 EP3077677 B1 EP 3077677B1
Authority
EP
European Patent Office
Prior art keywords
pump
impeller
sampling pump
motor
assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP14867021.9A
Other languages
German (de)
English (en)
Other versions
EP3077677A1 (fr
EP3077677A4 (fr
Inventor
Douglas D. Colby
Thomas T. Reesbeck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
QED Environmental Systems Inc
Original Assignee
QED Environmental Systems Inc
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Filing date
Publication date
Application filed by QED Environmental Systems Inc filed Critical QED Environmental Systems Inc
Publication of EP3077677A1 publication Critical patent/EP3077677A1/fr
Publication of EP3077677A4 publication Critical patent/EP3077677A4/fr
Application granted granted Critical
Publication of EP3077677B1 publication Critical patent/EP3077677B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/10—Units comprising pumps and their driving means the pump being electrically driven for submerged use adapted for use in mining bore holes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
    • E21B49/084—Obtaining fluid samples or testing fluids, in boreholes or wells with means for conveying samples through pipe to surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/068—Battery powered
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0693—Details or arrangements of the wiring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D5/00—Pumps with circumferential or transverse flow
    • F04D5/002—Regenerative pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D5/00—Pumps with circumferential or transverse flow
    • F04D5/002—Regenerative pumps
    • F04D5/007—Details of the inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D5/00—Pumps with circumferential or transverse flow
    • F04D5/002—Regenerative pumps
    • F04D5/008—Details of the stator, e.g. channel shape

Definitions

  • the present disclosure relates to groundwater sampling pumps, used to collect water samples from groundwater fed wells.
  • Groundwater sample pump systems are known which use DC motors to pump effluent from a well upward to ground level where a sample is drawn for off-site analysis.
  • Known systems use a full speed pump and a throttle device at a discharge location to reduce discharge flow for collecting the sample.
  • a disadvantage of known systems is that the throttle device reduces volume flow rate, but locally increases the flow velocity, making collection of a small volume sample difficult.
  • power consumption of known groundwater sample pump systems can range from 20 up to 40 Amperes, and commonly requires a high current AC power source with an AC/DC converter to provide DC power for pump motor operation, which is both heavy and expensive.
  • An AC power source is often not available at remote well sites, therefore the operator must bring a separate source of AC power.
  • sampling systems use a centrifugal pump which at operating speed (12,000 to 15,000 rpm) results in cavitation at the impeller when the flow rate is reduced downstream by the sample throttle device
  • US 2007/0166178 A1 discloses a sampling pump configured for use in a wellbore for pumping liquids collecting in the wellbore, and comprising a regenerative impeller driven by an electric motor and controlled by a float switch.
  • a control box connected to a solar panel controls the pump operations.
  • the prior art pump fails to disclose the following features of the present invention: the semicircular discharge channel extending from a tapered minimum area channel end, in a semicircular path, to a maximum area channel end proximate the discharge opening ; the semicircular supply channel beginning at a tapered minimum area channel end and extending in a semicircular path to a maximum area channel end positioned proximate to an inlet bore; and the reel assembly having a reel rotatably supported from a frame, the reel configured to enable the flexible cable assembly to be wound thereon when the sampling pump is not in use, and unwound from the reel as the pump outer housing is lowered down into the wellbore.
  • Further prior art wellbore pumps are known from US 2006/0180302 A1 and US 2010/0211226 A1 .
  • Document US 2002/0071759 A1 discloses details of the casing of a prior art regenerative pump.
  • the present disclosure relates to a sampling pump configured for use in a wellbore for pumping liquids collecting in the wellbore.
  • the sampling pump according to the invention comprises the features of claim 1
  • the present disclosure relates to a sampling pump configured for use in a wellbore for pumping liquids collecting in the wellbore.
  • the sampling pump may comprising a pump component having an outer housing configured to be inserted into the well bore, an inlet and an outlet each being operably associated with the outer housing at opposite ends of the outer housing.
  • a pump element may be housed in the outer housing.
  • a direct current (DC) motor may be housed within the outer housing for driving the pump element.
  • the pump element may be in communication with the inlet and the outlet, and configured to draw liquids out from the wellbore into the outer housing and to the outlet when driven rotationally by the DC motor.
  • a flexible cable assembly may be in communication with the outlet for supplying DC power to the pump component when the pump component is positioned in the wellbore.
  • a reel assembly may be included which has a reel rotatably supported from a frame, the reel configured to enable the flexible cable assembly to be wound thereon when the pump component is not in use.
  • a DC electrical connector is supported on the frame for enabling DC power from an external DC power source to be coupled to the reel assembly for powering the DC motor.
  • a fluid level sensor is operably associated with the housing for detecting when the housing is positioned in fluid. The sensor may be configured to display a first optical signal when submerged in water and a second optical signal when not submerged in water.
  • a DC battery may be supported on the reel assembly for providing electrical power to the fluid level sensor while no power is being supplied to the DC motor.
  • a user engageable switch may be included for selectively applying and turning off power to the fluid level sensor while no power is being supplied to the DC motor.
  • a control panel may be supported from the frame of the reel assembly. The control panel may be in electrical communication with the fluid sensor and configured to enable a user to control on and off operation of the DC motor, as well as to connect DC power from an external DC power source to the control panel.
  • the present disclosure relates to a sampling pump assembly including a pump outer housing having an inlet end cap with multiple water inlet ports.
  • the inlet end cap is connected to the pump outer housing using bayonet pins extending through L-shaped slots in a first housing connector.
  • An outlet end cap is connected to the pump outer housing using bayonet pins and has a tubing connector for releasably connecting an effluent tube thereto.
  • a pump is included which has a regenerative impeller connected to a brushless DC motor.
  • the brushless DC motor is positioned within the pump outer housing and the regenerative impeller is positioned within the inlet end cap.
  • the brushless DC motor may operate at approximately 8,000 rpm providing a lift of at least up to about 45,72m (150 feet), and possibly higher.
  • a sensor extends beyond the outlet end cap and provides a sensing signal when the pump assembly becomes submerged below a water surface in a wellbore in which the pump outer housing is positioned.
  • a reel assembly is included which has a rotatable support reel for supporting a flexible cable assembly for supplying DC power to the brushless DC motor.
  • the flexible cable assembly is able to be wound onto the rotatable support reel.
  • At least one internal battery is carried by the reel assembly which provides electrical power for the sensor.
  • An LED is provided with the reel assembly and is configured to flash continuously as the sampling pump assembly is lowered into a wellbore and prior to the sensor contacting water. The LED changes to a continuously illuminated condition when the pump assembly extends below a water level surface in the wellbore. Multiple distance marks are created on the flexible cable assembly to enable a user to determine a depth that the pump outer housing is
  • a sampling pump assembly includes a pump outer housing having a housing inlet end releasably connected thereto.
  • the housing inlet end includes multiple water inlet ports and is connected to the pump outer housing using one or more bayonet pins radially extending through one or more L-shaped slots created in a first housing connector.
  • an inlet end cap which is similarly connected using one or more bayonet pins received in an L-shaped slot of a second housing connector.
  • the inlet end cap receives a tubing connector for releasably connecting an effluent tube.
  • a sensor extends beyond the inlet end cap and provides a sensing function for the period when sampling pump assembly is operated and submerged below a water volume surface.
  • the sampling pump assembly is readied to be lowered into a well, a first switch, located on a control panel of the reel, is switched from an "off" to an "on” position.
  • An internal battery provided within the reel provides sufficient electrical power for operation of the sensor as the sampling pump assembly is lowered.
  • An LED also present on the control panel flashes continuously as the sampling pump assembly is lowered into the well and prior to sensor contacting a water volume within the well.
  • the sampling pump assembly enters the water volume and extends below a water level surface, water contacts the sensor, which creates an electrical signal indicating that the entire sampling pump assembly is positioned below the water level surface.
  • the LED changes from a continuous flashing condition to a continuous energized "on” condition.
  • the “on” condition of the LED visually indicates to the operator that the sampling pump assembly is fully submerged within the water volume.
  • the sampling pump assembly is drawn upward until the LED changes back to the continuous flashing operation, at which time a plurality of distance marks provide a depth indicated in 1 foot incremental positions along the outer casing of a cable assembly identifying depth in feet of the position of the sampling pump assembly within the well.
  • the sampling pump assembly is lowered back into the well until the LED changes again to the continuous "on” condition.
  • An external source of 12 VDC electrical power is then connected to the reel and the operator switches a second switch from an "off” to an "on” position, which starts operation of the DC motor.
  • a sampling pump assembly 10 includes a pump outer housing 12 having a housing inlet end 14 releasably connected thereto.
  • the housing inlet end 14 includes multiple water inlet ports 16.
  • the housing inlet end 14 is connected to the pump outer housing 12 using one or more bayonet pins 18 radially extending through an L-shaped slot 20 created in a first housing connector 22.
  • the housing inlet end 14 is oriented such that the bayonet pin 18 is received in the L-shaped slot, and the housing inlet end 14 is axially rotated to releasably lock the housing inlet end 14 in position.
  • an outlet end cap 24 which is similarly connected using one or more bayonet pins 26 received in an L-shaped slot 28 of a second housing connector 30.
  • the outlet end cap 24 receives a tubing connector 32 for releasably connecting an effluent tube shown and described in greater detail in reference to FIG. 9 .
  • a sensor 34 extends beyond the outlet end cap 24 and provides a sensing function for the period when sampling pump assembly 10 is operated and submerged below a water volume surface, as described in greater detail in reference to FIG. 9 .
  • the sampling pump assembly components such as the pump outer housing 12, the housing inlet end 14, and the outlet end cap 24 can be constructed of a metal material, such as stainless steel. Other materials can also be used.
  • the tubing connector 32 communicates with a discharge chamber 36 where water pumped by the sampling pump assembly 10 is received for discharge.
  • a conduit connector 38 is also provided which provides the ability to both receive and seal conduits providing electric power as well as control signals to the operating components of sampling pump assembly 10.
  • a conduit 39 is shown in an exemplary position retained by the conduit connector 38.
  • the conduit 39 provides electrical power, as previously noted, for operating the components of sampling pump assembly 10.
  • the housing inlet end 14 provides an inlet chamber 40 proximate to a housing inlet end wall 14a.
  • a filter 42 such as a metal or plastic screen, is releasably connected to an inlet end wall 44 which defines a boundary wall for the inlet chamber 40 opposite to the housing inlet end wall 14a. Water flowing into the inlet chamber 40, via the water inlet ports 16, passes through the filter 42 and enters an impeller chamber 46.
  • the inlet end wall 44 defines a portion of housing inlet end 14 which is sealed against an inner perimeter wall of pump outer housing 12 at the time the bayonet pins 18 are engaged, using one or more seal members 48 such as O-rings.
  • a pump element in the form of a "regenerative" impeller 50 positioned within impeller chamber 46, is held in rotational position using an impeller retainer 52.
  • a connecting member 54 extends partially through and positively rotatably engages impeller 50.
  • the connecting member 54 extends through a motor shaft seal 55 to allow for fluid sealed rotation of impeller 50.
  • Impeller 50 is connected to and rotated by operation of a brushless DC motor 56 having a motor shaft 57 extending into and connected with the connecting member 54.
  • the motor shaft seal 55 prevents water within impeller chamber 46 from entering a sealed enclosure having DC motor 56 contained therein.
  • a circuit board 58, as well as DC motor 56, are positioned within a watertight cavity 60 provided by a pump inner housing 62 which is slidably received within the pump outer housing 12.
  • the components of the circuit board 58 may be potted to hermetically seal them.
  • a plurality of electrically conductive metal pins 61 may project from the circuit board 58 into the space between the motor 56 and the edge of the circuit board 58 to detect if water is present in this space.
  • the metal pins 61 sense the presence of water by detecting when a conductive path between them has been formed.
  • the brushless DC motor 56 using regenerative impeller 50 can operate at lower speed (approximately 8,000 rpm) than known pump systems. This provides the necessary lift while minimizing pump cavitation.
  • a flow passage 64 is circumferentially created between a tubular shaped outer perimeter wall of the pump inner housing 62 and an inner wall of the tubular shaped pump outer housing 12. Fluid discharged by operation of the impeller 50 passes through the flow passage 64 in a flow direction "A" to be subsequently discharged from the sampling pump assembly 10. As the impeller 50 is rotated by operation of DC motor 56, fluid drawn through the impeller 50 from the impeller chamber 46 is radially outwardly discharged into an impeller outlet region 66 which communicates with the flow passage 64.
  • the water flow After the water flows from the impeller outlet region 66 and through the flow passage 64, the water flow enters one or more collecting ports 68 and further flows through a discharge port 70 created in a pump top end member 72.
  • the pump top end member 72 is received within the outlet end cap 24 and is provided with a plurality of end member seals 74, such as O-rings, to provide a fluid seal between pump top end member 72 and an inner wall of the pump inner housing 62.
  • the end member seals 74 therefore prevent water within either the collecting ports 68 or discharge port 70 from entering the watertight cavity 60.
  • the pumped water After flowing through the discharge port 70, the pumped water enters the discharge chamber 36.
  • the tubing connector 32 is releasably coupled to the pump top end member 72 using connector threads 76 such that a discharge bore 78 of the tubing connector 32 is coaxially aligned with discharge chamber 36. All of the water pumped by rotation of impeller 50 therefore discharges from discharge chamber 36 via discharge bore 78.
  • the conduit connector 38 is threadably connected to the pump top end member 72 using conduit connector threads 80.
  • the quantity of bayonet pins can vary at the discretion of the manufacturer.
  • an impeller assembly 82 includes the impeller retainer 52 partially extending from an impeller housing 84.
  • the impeller housing 84 can be fixed about its circumference to the pump outer housing 12, for example by welding.
  • the impeller assembly 82 provides the impeller housing 84, which includes a housing flange 86 extending radially outward from the impeller housing 84 to provide a location for fixing the impeller housing 84 to the pump outer housing 12.
  • a housing cylinder wall 88 is cylindrical in shape and includes both a first counterbore 90 and a second counterbore 92 created therein.
  • the impeller 50 is rotatably positioned within the first counterbore 90, and the impeller retainer 52 is non-rotatably received in the second counterbore 92.
  • the first counterbore 90 has a smaller diameter than a diameter of the second counterbore 92 such that the impeller retainer 52 overlaps the impeller 50.
  • a clearance "B” is provided between an outer perimeter wall of the impeller 50 and the inner wall defined by the first counterbore 90. Clearance “B” allows for a water film to be continuously provided between the impeller 50 and the housing cylinder wall 88, thereby minimizing friction as the impeller 50 rotates.
  • a connecting member slot 94 is centrally created through the impeller 50 which receives and engages the connecting member 54 extending from the motor shaft 57, thereby providing positive engagement for rotation of impeller 50.
  • a seal ring slot 96 is provided proximate to the connecting member slot 94 to provide for a seal between the connecting member 54 and the impeller housing 84.
  • the impeller housing 84 is provided with a discharge opening 98 through which the water displaced by rotation of impeller 50 is received.
  • the discharge opening 98 is in communication with a semicircular shaped discharge channel 100 which is created as a recess on a housing inner face 101 of impeller housing 84.
  • the discharge channel 100 is in fluid communication with multiple impeller flow passages 102 extending through impeller 50.
  • the housing inner face 101 is spaced from an impeller discharge side 104 of impeller 50 also by a fluid layer, minimizing friction as the impeller 50 rotates.
  • On an opposite side of impeller 50 from the impeller discharge side 104 is an impeller supply side 106.
  • a semicircular shaped supply channel 107 is created as a recess in a retainer face 108 of the impeller retainer 52.
  • the semicircular supply channel 107 is created in a retainer first portion 110 which as previously noted is received within the second counterbore 92 of housing cylinder wall 88.
  • a threaded bore 112 is created in a retainer second portion 114 which can have a smaller diameter than the retainer first portion 110. The threaded bore 112 allows for a threaded tool (not shown) to be used to remove the impeller retainer 52 and thereby to remove the impeller 50 for service.
  • the semicircular discharge channel 100 extends from a tapered minimum area channel end 116, in a semicircular path, to a maximum area channel end 118, positioned proximate to the discharge opening 98. All of the water entering semicircular discharge channel 100 is thereby discharged out through discharge opening 98.
  • the semicircular supply channel 107 created in the retainer face 108 of impeller retainer 52, begins at a tapered minimum area channel end 120 and extends in a semicircular path to a maximum area channel end 122 positioned proximate to an inlet bore 124 extending axially through the retainer first portion 110 of impeller retainer 52. All water entering inlet bore 124 therefore passes through the semicircular supply channel 107 to be drawn through the impeller vanes 109 of impeller 50 and discharged into the semicircular discharge channel 100.
  • the sampling pump assembly 10 forms a portion of a groundwater sampling pump system 126.
  • the groundwater sampling pump system 126 further includes a reel assembly 125 having an A-shaped frame 128 that can be made, for example, from metal tubing.
  • the A-shaped frame 128 includes each of a first arm 130 and an oppositely positioned second arm 132 supported therebetween by a handle portion 134.
  • the handle portion 134 is provided to allow manual carrying of the groundwater sample pump system 126.
  • a first leg 136 extends at a substantially transverse orientation with respect to a distal end of first arm 130.
  • a second leg 138 similarly extends from the second arm 132.
  • the first and second legs 136, 138 allow the groundwater sampling pump system 126 to be either supported from a ground surface or from a well pipe which will be better described in reference to FIG. 9 .
  • a bracket 140 is fixed between each of the first and second arms 130, 132 and rotatably supports a reel 142 on the A-shaped frame 128.
  • An electrical cable assembly 144 is wound onto reel 142 and is electrically connected to the sampling pump assembly 10.
  • a control panel 146 supported at a central portion of the reel 142 provides local operator control and operation of groundwater sampling pump system 126, as will be better described in reference to FIGS. 9 and 10 .
  • a hollow tube 148 is fixed to each of the first and second arms 130, 132 proximate to a juncture with the first and second legs 136, 138.
  • the hollow tube 148 also acts as a storage tube where the sampling pump assembly 10 can be internally stored when not in use.
  • the sampling pump assembly 10 is retained within the storage or hollow tube 148 using a releasable pin 150 installed or withdrawn using a pin loop 152 connected to the releasable pin 150.
  • a U-shaped brace 154 is connected to a post 156 which is fixed to the storage or hollow tube 148.
  • the U-shaped brace 154 assists with mounting the groundwater sampling pump system 126 to a well pipe, which is shown and better described in reference to FIG. 9 .
  • a rigid support rod 158 having an eyelet 160, can be releasably fixed to the pump top end member 72 of sampling pump assembly 10.
  • a lift cable 162, such as a braided steel wire, can be connected to the eyelet 160 and extended into the well along with sampling pump assembly 10 if it is desired to use additional lift capability for removal of sampling pump assembly 10 from the well.
  • the groundwater sampling pump system 126 can be temporarily attached to a well 164 normally configured as a well pipe partially extending above a ground level 166 and predominantly extending below the ground level 166.
  • the sampling pump assembly 10 is inserted downwardly into an interior bore 168 of the well 164 to draw water samples from the well 164 by unreeling the cable assembly from reel 142.
  • the U-shaped brace 154 is positioned within the interior bore 168 of well 164 and makes direct contact with a well inner wall surface 170, while the second leg 138 is positioned in direct contact with a well upper surface 172, and the first leg 136 is positioned in direct contact with a well outer wall surface 174 of well 164.
  • groundwater sample pump system 126 positions the post 156 proximate to an opening of well 164.
  • the post 156 provides a bearing surface for sliding motion of cable assembly 144 as the sampling pump assembly 10 is inserted and/or withdrawn into or out of the well 164.
  • an effluent tube 176 Prior to insertion of the sampling pump assembly 10, an effluent tube 176, such as a clear plastic tube, is connected to the tubing connector 32 of sampling pump assembly 10.
  • both the cable assembly 144 and the effluent tube 176 are lowered at approximately the same rate to prevent bends from forming in either of these items within the well. If the lift cable 162 is also used, the lift cable 162, the cable assembly 144 and the effluent tube 176 are all lowered at approximately the same rate to prevent bends from forming in any of these items within the well.
  • a first switch 178c located on the control panel 146 is switched from an "off" to an "on” position.
  • An internal battery provided (component 210 discussed in connection with FIG. 13 ) on the reel 142 provides sufficient electrical power for operation of the sensor 34 as the sampling pump assembly 10 is lowered.
  • An LED 180 also present on the control panel 146, flashes continuously as the sampling pump assembly 10 is lowered into the well and prior to sensor 34 contacting a water volume 182 within the well.
  • the water volume 182 is normally located above a well lower end 184 in a normal condition of well 164 such that the water inlet ports 16 are positioned above the well bottom.
  • the operator can manually withdraw the sampling pump assembly 10 upward until the LED 180 changes back to the continuous flashing operation, at which time the operator can visually use a plurality of distance marks 188 which provide a depth indicated in 1 foot incremental positions along the outer casing of the electrical cable assembly 144 upward from zero at the sampling pump assembly 10.
  • the distance marks 188 provide a measurable depth in feet of the position of sampling pump assembly 10 within well 164 for recordation and pump operational purposes.
  • the operator then re-lowers the sampling pump assembly 10 back into the well 164 until the LED 180 changes again to the continuous "on” condition.
  • the operator changes the position of first switch 178 back to the "off" position and connects an external source of 12 VDC electrical power to the reel 142.
  • the operator switches a second switch 190 from an "off" to an "on” position, which starts operation of the DC motor 56 provided within sampling pump assembly 10.
  • a water flow exits from the effluent tube 176. Stagnant water is then pumped out from the well for some period of time until fresh water is drawn into the well 164. After an additional period of time to purge the remaining stagnant water from the effluent tube 176, a fresh water sample is then collected in a sample container 192.
  • the operator connects external power to the reel 142 by manually making a plug-in connection between a power coupling 194 and an electrical connector 196 provided on control panel 146.
  • Power coupling 194 is connected via a power cable 198 to a 12 VDC power source 200, such as a 12-volt DC battery of an automotive vehicle.
  • Hand operated clamps (not shown), such as commonly provided with automotive jumper cable sets, may also be connected at ends of the power cable 198 to facilitate releasable connection of the groundwater sample pump system 126 to the power source 200.
  • the sensor is powered by the 12-volt DC battery.
  • the sensor 34 provides an additional on-off feature such that the DC motor 56 is automatically de-energized when the sensor 34 detects that the sampling pump assembly 10 is above the water level surface 186 of the well water volume 182.
  • control panel 146 the components provided on control panel 146 include: (1) the first switch 178, which can be a toggle "on/off” switch or any type of single pole switch; (2) the second switch 190, which can also be a toggle "on/off” switch or any type of single pole switch; (3) the LED 180, which according to several aspects can provide a green-colored indication light; and (4) the connector 196, to which the operator connects the power coupling 194.
  • a pump speed selector 202 which according to several aspects is an axially rotatable potentiometer which is rotated by the operator to control an operating speed of the DC motor 56 between a zero operating speed and a maximum operating speed.
  • a maximum speed, and therefore maximum pumping rate, of DC motor 56 is dependent on the depth that the sampling pump assembly 10 is positioned within well 164 and therefore is based on a height "C" (shown in reference to FIG. 9 ) that the total column or height of lift is required of the DC motor 56.
  • the operator can rotate the pump speed selector 202 to its maximum rotated "on" position, allowing maximum flow rate to discharge from effluent tube 176 for a period of time determined by the operator. After this period of operation, the operator can then rotate the pump speed selector 202 counterclockwise to select a slow rate of discharge flow from effluent tube 176 which suits a desired fill rate of the sample container 192.
  • a standard 12 VDC battery such as the battery of an automotive vehicle can provide operative electrical power for operation of brushless DC motor 56.
  • Power consumption for DC motor 56 ranges between approximately 50 to 150 watts, at a current of 1 to 8 Amperes.
  • the power consumption of known centrifugal pump groundwater sampling pump systems can range from 20 up to 40 Amperes, and commonly require a high current AC power source with conversion to DC power, therefore power consumption of the groundwater sample pump system 126 is reduced by up to approximately 80% compared to known systems.
  • 1 1 identifies a range of flow rates for groundwater sample pump system 126 of approximately 1 .25 gpm at the well surface or ground level 166 reducing to a flow rate of zero at approximately 44,2 to 45,7m (145 to 150 feet) maximum well depth "C".
  • a voltage booster (shown and described in reference to FIG. 12 ) can be provided, which boosts the 12 VDC voltage up to 18 VDC.
  • the range of flow rates for groundwater sample pump system 126 shown as graph 2 of FIG. 1 1 can be increased from approximately 1 .6 gpm at the well surface or ground level 166 and reducing to a flow rate of approximately 0.7 gpm at 45,7m (150 feet) well depth "C". It is anticipated that using the voltage booster can provide a maximum pump operating depth of approximately 54,9m (180 feet) while still using the same 12 VDC power source 200.
  • a circuit diagram provides components and data input and output ports for operation of groundwater sample pump system 126.
  • Electronic Speed Control (ESC) for the DC pump is provided at ESC 202 which is connected to a first microcontroller 204.
  • An output of the sensor 34 is also connected to first microcontroller 204, which is also provided with a programming port 206 to enter system operating variables and control set points.
  • a power input and regulator section 208 is provided to control power to operate the brushless DC motor 56, which can include a voltage booster increasing the voltage output from 12 VDC to approximately 18 VDC for increasing an operating depth of the sampling pump assembly 10.
  • the microcontroller 204 can also be used to form an hour meter to track the total time that the DC motor 56 operates.
  • the total time may be displayed to the user by controlling a blinking action (i.e., on/off action) of the LED 180.
  • a blinking action i.e., on/off action
  • the LED 180 may be blinked once when the assembly 10 is first powered on if the total run time is between 0-100 hours.
  • the LED 180 may be blinked twice if the total run time is between 100- 200 hours, three times if the total run time is between 200-300 hours, etc.
  • the blinking action may be repeated, for example three times, with a short off interval between each on/off sequence. After that the LED 180 may be used in connection with its water sensing operation to indicate when the pump outer housing 12 is submerged in water.
  • a small capacity second battery 210 such as a 9-volt battery, is located on the reel 142 and provides operating power for LED 180 and sensor 34 during initial installation of the sampling pump assembly 10 into the well 164, as well as powering microcontroller 204 and a second microcontroller 212 when the main 12VDC power source is not connected. Second battery 210 provides sufficient power to test operation of brushless DC motor 56 prior to insertion into the well. Second battery 210 is connected to the second microcontroller 212, which in turn is in communication with and regulates operation of both the LED 180 and the pump speed selector 202.
  • a wireless frequency transceiver for example a Bluetooth® protocol wireless transceiver 214, can also be optionally used which communicates with the second microcontroller 212 via a communication path 216.
  • the Bluetooth® protocol transceiver 214 provides for remote wireless communication between the groundwater sampling pump system 126 and a portable electronic device 218, such as a smart phone, via a wireless signal path 220.
  • the portable electronic device 218 can also communicate data between the sampling pump system 126 and one or more cloud-based subsystems 222 using a wireless transmission path 224.
  • an additional larger capacity rechargeable battery 226 can also be provided with reel 142.
  • Battery 226 is sized to provide limited operating time for DC motor 56 to provide sample flow from well 164 when the power source 200 is not available.
  • Battery 226 may be releasably mounted via any suitable mounting bracket or fixture (not shown) to the A-shaped frame 128 for convenience.
  • the groundwater sampling pump system 126 can be controlled, operated and have data uploaded or downloaded using the portable electronic device 218, such as a smartphone, tablet, laptop, or virtually any other form of personal electronic device. This allows motor speed control, water level status indication, time of operation of the motor 56, battery state, troubleshooting, historical data such as past motor operating run times and speed settings and other data to be collected and remotely accessed for individual wells. The operator can therefore access other well site data in addition to previous data from well 164 to determine potential settings for operation of groundwater sample pump system 126 at the specific well such as well 164.
  • the groundwater sampling pump system 126 offers several advantages. These include: (1) the provision of a pump system having a 12-volt brushless DC motor with circuitry provided in the pump assembly housing and with communication lines for control of the system grouped together with power cables extending from the circuitry of the pump assembly housing to a reel positioned at a ground level position, such that the DC motor operating speed and current are reduced from known sample pump systems thereby improving operating efficiency; (2) the use of a regenerative impeller with the 12-volt brushless DC motor permits the operating speed of the DC motor to be reduced from approximately 12,000 to 15,000 rpm of known sample pump systems having centrifugal impellers down to approximately 8,000 rpm, which significantly reduces cavitation at the impeller, improving pump assembly and impeller life and reducing impact on water samples withdrawn from the well; (3) the reel used to retain the pump assembly power and control cabling includes a built-in controller providing local control of the pump assembly; (4) a water sensor is provided with the pump assembly that is remotely connected to an LED on a panel of the reel providing visual indication
  • a sampling pump assembly 300 can be seen in accordance with another embodiment of the present disclosure.
  • the pump assembly 300 is substantially identical in construction and operation to the sampling pump assembly 10 discussed above, with the exceptions noted below.
  • the sampling pump assembly 300 includes a housing 302 having a curving J-shaped 306 slot at a first end 304, and a similar curving J-shaped slot 310 in a housing connector 308 associated with a housing inlet end component 312.
  • FIG. 15A illustrates the J-shaped slot 310 in greater detail. Since the construction of the J-shaped slots 306 and 310 are identical in this example, only the detailed construction of J-shaped slot 310 will be provided.
  • a pair of J-shaped slots 306 spaced about 180 degrees apart from one another are included on the housing 302, and likewise a pair of the J-shaped slots 310 are included on housing connector 308 and spaced apart about 180 degrees from one another, although only one of each of the J-shaped slots 306 and 310 is visible in FIG. 14 .
  • J-shaped slot 310 includes a gradually curving section 314 and a slightly enlarged end portion 316. End portion 316 helps to define a point 318 which provides a positive retention feature when bayonet pin 320 ( FIG. 15 ) is urged into the gradually curving section 314 of the J-shaped slot 310 and then urged over point 318.
  • At least one interior gasket 322 ( FIG. 16 ) will begin to be compressed by a distal edge 324 of impeller chamber 326 as the bayonet pin 320 reaches, and moves past, point 318.
  • Point 318 helps to effect a positive "snapping” or “clicking” action/feel as the bayonet pin 320 is urged over the point 318 into full engagement within enlarged end portion 316. Creation of the snapping/clicking action is assisted by the slight compressibility of the internal gasket mentioned above.
  • a positive retention of the bayonet pin 320 and locking action within the enlarged end portion 316 occurs because the enlarged end portion 316 defines a distance D1 which slightly less than a Distance D2.
  • the bayonet pin 320 is urged over the point 318 and fully engages in the end portion 316, the user feels a definite snapping or clicking action (i.e., tactile feedback), which indicates the bayonet pin is fully seated in the enlarged end portion 316.
  • point 318 helps to prevent the bayonet pin 320 from being urged back into the curving portion 314 without some definite counter rotational force applied by the user.
  • This retention, and an excellent fluid tight seal between components 302 and 312 is thus accomplished without the need for any separate sleeves or locking rings, as otherwise required with some previously developed bayonet locking designs.
  • FIG. 17 illustrates an easily accessible and replaceable annular motor shaft seal 350 integrated into the pump assembly 300.
  • the motor shaft 57 can be seen engaged with the connecting member 54.
  • annular seal 350 Surrounding the connecting member 54 is an annular seal 350, The seal 350 may be preferably be a PTFE FlexiSeal sealing element commercially available from the Parker Hannifin Corporation, or any suitable equivalent form of seal.
  • Surrounding the seal 350 may be a sealing retainer 352 having a body portion 354 and a pair of O-rings 356 and 358 seated in upper and lower annular recesses 360 and 362 respectively. Both the seal 350 and the sealing retainer 352 rest on a precision dimensioned spacer 364, which in turn rests on an end face 366 of the motor shaft 57.
  • outer diameter of the spacer 364 is just slightly greater, for example by about 0,38mm (0.015 inch), than the outer diameter of the body portion 354, but preferably about 0.13 mm (0.005 inch) smaller than the internal diameter of a recess 363 of a removable bearing retainer component 368. This tight tolerance allows the seal 350 to sit centered to the connecting member 54 throughout the entire assembly shown in FIG. 17 without being moved off center.
  • the removable bearing retainer component 368 has a pair of bores 370 which receive a pair of threaded fasteners 372. Threaded fasteners 372 engage within threaded blind holes in the end face 366 of the motor shaft 57. Threaded fasteners 372 enable the bearing retainer component 368 to be quickly and easily removed in the field by an individual using only a conventional hand tool such as an Allen wrench, screwdriver, etc. Disassembly and reassembly can be performed in the field without complex procedures. When disassembled, the PTFE FlexiSeal sealing element 350 and/or the sealing retainer 352 can thus be easily replaced without the need for special tools.
  • FIGS. 18-20 various views of an impeller retainer 380 in accordance with another embodiment of the present disclosure may be seen.
  • FIGS. 21 -24 illustrate various views of another embodiment of an impeller housing 382 that may be used with the impeller retainer 380.
  • Impeller retainer 380 forms a pump inlet with a ramped surface 384 ( FIG.
  • volute portions 384a and 386a communicate with each other.
  • the impeller housing 382 includes a ramped portion 388 that even more efficiently helps to direct the flow out from volute portion 390.
  • the flow enters the volute portion 390 at point 390a and leaves at portion 390b of the volute portion 390. As the flow leaves portion 390a in enters the ramped portion 388 in FIG. 21 . Accordingly, the ramped portions 384 and 388 enable even more efficiently directing flow into and out from the volute formed by volute portions 386 and 390.
  • Example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope to those who are skilled in the art. Numerous specific details are set forth such as examples of specific components, devices, and methods, to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.
  • first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as “first,” “second,” and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
  • spatially relative terms such as “inner,” “outer,” “beneath,” “below,” “lower,” “above,” “upper,” and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures.
  • Spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “above” the other elements or features.
  • the example term “below” can encompass both an orientation of above and below.
  • the device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Health & Medical Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Sampling And Sample Adjustment (AREA)

Claims (13)

  1. Pompe de prélèvement configurée pour une utilisation dans un puits de forage afin de pomper des liquides s'accumulant dans le puits de forage, la pompe de prélèvement comprenant :
    un ensemble de pompe de prélèvement (10) ayant un boîtier extérieur de pompe (12) configuré pour être inséré dans le puits de forage, le boîtier extérieur de pompe (12) ayant une entrée et une sortie ;
    un élément de pompe régénératif formé par une roue (50) ayant une pluralité d'aubes de roue (109) ;
    un ensemble de roue (82) comprenant :
    un boîtier de roue (84) fixé autour de sa circonférence extérieure au boîtier extérieur de pompe (12) ayant un canal de décharge de forme semi-circulaire (100) sur une face intérieure (101) du boîtier de roue (84), le canal de décharge de forme semi-circulaire (100) étant en communication avec des passages d'écoulement de roue (102) s'étendant à travers la roue (50) et avec une ouverture de décharge (98), et le canal de décharge semi-circulaire (100) s'étendant d'une extrémité de canal à zone minimale en pointe (116), dans une trajectoire semi-circulaire, jusqu'à une extrémité de canal à zone maximale (118) à proximité de l'ouverture de décharge ;
    un dispositif de retenue de roue (52) ayant un canal d'alimentation semi-circulaire (107) commençant au niveau d'une extrémité de canal à zone minimale en pointe (120) et s'étendant dans une trajectoire semi-circulaire jusqu'à une extrémité de canal à zone maximale (122) positionnée à proximité d'un alésage d'entrée (124) ;
    un moteur à courant continu (CC) et une carte de circuit imprimé (58) logés dans une cavité étanche (60) fournie par un boîtier intérieur de pompe (62), qui est reçu de manière coulissante dans le boîtier extérieur de pompe (12), le moteur à courant continu permettant d'entraîner la roue (50), la roue (50) étant en communication avec l'entrée et la sortie, et configurée pour extraire des liquides du puits de forage dans le boîtier extérieur de pompe (12) et jusqu'à la sortie lorsqu'elle est entraînée en rotation par le moteur CC ;
    un ensemble de câble flexible (144) en communication avec l'ensemble de pompe de prélèvement (10) alimentant le moteur CC en courant continu ;
    un ensemble de bobine (125) ayant une bobine supportée en rotation à partir d'un châssis (128), la bobine étant configurée pour permettre à l'ensemble de câble flexible (144) d'être enroulé sur celle-ci lorsque la pompe de prélèvement n'est pas utilisée, et déroulé de la bobine lorsque le boîtier extérieur de pompe (12) est abaissé dans le puits de forage ;
    un connecteur CC supporté sur le châssis pour permettre à une source de courant continu externe d'être couplée à l'ensemble de bobine (125) afin d'alimenter le moteur CC;
    un capteur de niveau de fluide associé de manière fonctionnelle au boîtier extérieur de pompe (12) pour détecter le moment où le boîtier extérieur de pompe (12) est positionné dans le fluide ; et
    un panneau de commande (146) supporté à partir du châssis de l'ensemble de bobine (125), le panneau de commande (146) étant en communication électrique avec le capteur de fluide et configuré pour permettre à un utilisateur de :
    commander la mise en marche et l'arrêt du moteur CC ; et
    connecter une source de courant continu externe au panneau de commande (146) afin d'alimenter la roue (50).
  2. Pompe de prélèvement selon la revendication 1, dans laquelle l'ensemble de câble flexible (144) comprend des marques sur celui-ci indiquant une unité de mesure de longueur.
  3. Pompe de prélèvement selon la revendication 1, dans laquelle le moteur CC comprend un moteur CC sans balai.
  4. Pompe de prélèvement selon la revendication 1, comprenant en outre :
    une batterie CC portée sur le châssis et couplée de manière électrique au capteur (34) pour alimenter le capteur ;
    un premier interrupteur (178) associé au panneau de commande (146) pour allumer et éteindre le courant continu jusqu'au capteur (34) ; et
    un indicateur en communication avec le capteur (34) pour indiquer le moment où le boîtier extérieur de pompe (12) est présent dans le fluide dans le puits de forage.
  5. Pompe de prélèvement selon la revendication 4, comprenant en outre un second interrupteur (190) sur le panneau de commande (146) pour permettre à un utilisateur de mettre en marche et d'arrêter le moteur CC.
  6. Pompe de prélèvement selon la revendication 4, dans laquelle l'indicateur comprend un dispositif optique qui fournit un signal afin d'indiquer à un utilisateur le moment où le capteur (34) a été immergé dans le fluide.
  7. Pompe de prélèvement selon la revendication 6, dans laquelle l'indicateur comprend un élément optique qui, lorsqu'il est allumé, clignote par intermittence avant d'entrer en contact avec le fluide, puis reste dans un état éclairé de manière constante tandis qu'il est immergé dans le fluide.
  8. Pompe de prélèvement selon la revendication 1, dans laquelle le châssis comprend une structure afin de recevoir l'ensemble de pompe de prélèvement et stocker l'ensemble de pompe de prélèvement lorsque l'ensemble de pompe de prélèvement n'est pas utilisé.
  9. Pompe de prélèvement selon la revendication 1, comprenant en outre une commande de vitesse réglable par un utilisateur associée de manière fonctionnelle au panneau de commande (146) pour permettre à un utilisateur de régler une vitesse du moteur CC, et ainsi un débit produit par la roue (50).
  10. Pompe de prélèvement selon la revendication 1, dans laquelle le capteur (34) est configuré pour éteindre automatiquement le moteur CC lorsque le capteur (34) détecte qu'il n'est plus immergé dans le fluide.
  11. Pompe de prélèvement selon la revendication 1, dans laquelle le panneau de commande (146) est configuré pour enregistrer un temps de fonctionnement total de la roue (50) et pour afficher le temps de fonctionnement total à un utilisateur.
  12. Pompe de prélèvement selon la revendication 1, comprenant en outre un émetteur-récepteur sans fil à courte portée (214) pour permettre au panneau de commande (146) de communiquer sans fil avec un dispositif électronique personnel distant d'un utilisateur.
  13. Pompe de prélèvement selon la revendication 1, comprenant en outre un tube adapté pour être fixé à la sortie du boîtier extérieur de pompe (12) afin d'acheminer le fluide pompé par la roue (50) à l'extérieur du puits de forage.
EP14867021.9A 2013-12-03 2014-12-03 Pompe de prélèvement d'eaux souterraines Not-in-force EP3077677B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361911273P 2013-12-03 2013-12-03
PCT/US2014/068371 WO2015084957A1 (fr) 2013-12-03 2014-12-03 Pompe de prélèvement d'eaux souterraines

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EP3077677A1 EP3077677A1 (fr) 2016-10-12
EP3077677A4 EP3077677A4 (fr) 2017-08-16
EP3077677B1 true EP3077677B1 (fr) 2019-11-13

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US (2) US20160298632A1 (fr)
EP (1) EP3077677B1 (fr)
CN (1) CN105849415B (fr)
AU (1) AU2014360502B2 (fr)
BR (1) BR112016011939A2 (fr)
CA (1) CA2931990A1 (fr)
ES (1) ES2762574T3 (fr)
WO (1) WO2015084957A1 (fr)

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Also Published As

Publication number Publication date
EP3077677A1 (fr) 2016-10-12
US20200256342A1 (en) 2020-08-13
CN105849415A (zh) 2016-08-10
AU2014360502A1 (en) 2016-06-02
BR112016011939A2 (pt) 2017-08-08
EP3077677A4 (fr) 2017-08-16
WO2015084957A1 (fr) 2015-06-11
US20160298632A1 (en) 2016-10-13
CA2931990A1 (fr) 2015-06-11
ES2762574T3 (es) 2020-05-25
AU2014360502B2 (en) 2018-06-28
CN105849415B (zh) 2019-05-31

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