( 19 ) United States
`( 12 ) Patent Application Publication ( 10 ) Pub . No .: US 2020/0256429 A1
`Buckley
`Aug. 13 , 2020
`( 43 ) Pub . Date :
`
`US 20200256429A1
`
`IN
`
`( 54 ) ELECTRIC DRIVE PUMP FOR WELL
`STIMULATION
`( 71 ) Applicant : ST9 GAS AND OIL , LLC , THE
`WOODLANDS , TX ( US )
`Inventor : Chris Buckley , Magnolia , TX ( US )
`( 72 )
`( 21 ) Appl . No .:
`16 / 647,832
`Sep. 25 , 2018
`( 22 ) PCT Filed :
`( 86 ) PCT No .:
`PCT / US2018 / 052755
`$ 371 ( c ) ( 1 ) ,
`( 2 ) Date :
`Mar. 16 , 2020
`Related U.S. Application Data
`( 60 ) Provisional application No. 62 / 562,943 , filed on Sep.
`25 , 2017 , provisional application No. 62 / 658,139 ,
`filed on Apr. 16 , 2018 .
`
`Publication Classification
`
`( 51 ) Int . Ci .
`F16H 1/22
`F16H 577023
`( 52 ) U.S. CI .
`CPC
`
`( 2006.01 )
`( 2006.01 )
`F16H 1/22 ( 2013.01 ) ; E21B 43/26
`( 2013.01 ) ; F16H 57/023 ( 2013.01 )
`
`( 57 )
`ABS RACT
`An electric drive pump system includes a power end and a
`detachable transmission assembly . The transmission assem
`bly is mounted to the power end and is configured to provide
`rotational power to the power end through a plurality of
`electric motors . The plurality of electric motors use a
`gearbox to drive an output spline that engages the power
`end . A control module is used to regulate the performance
`characteristics of the plurality of electric motors . A tempera
`ture regulation assembly is configured to regulate the tem
`perature of the transmission assembly and the power end .
`
`101
`
`CW Motors
`111
`
`Control /
`Power Module
`107
`
`Temperature
`Assembly
`109
`
`CCW Motors
`111
`
`Gearbox
`113
`
`Power End
`103
`
`Gearbox
`113
`
`105
`
`105
`
`Fluid End
`
`LIBERTY EXHIBIT 1004, Page 1
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`

`

`Patent Application Publication
`
`Aug. 13 , 2020 Sheet 1 of 10
`
`US 2020/0256429 A1
`
`101
`
`CW Motors
`111
`
`Control /
`Power Module
`107
`
`Temperature
`Assembly
`109
`
`CCW Motors
`111
`
`Gearbox
`113
`
`Power End
`103
`
`Gearbox
`113
`
`105
`
`105
`
`Fluid End
`
`FIG . 1
`
`LIBERTY EXHIBIT 1004, Page 2
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`

`

`Patent Application Publication
`
`Aug. 13 , 2020 Sheet 2 of 10
`
`US 2020/0256429 A1
`
`101
`
`105
`
`117
`
`FIG . 2
`
`101
`
`105
`
`119
`
`109
`
`103
`
`0000
`
`105
`
`119
`
`103
`
`105
`
`117
`
`109
`
`121
`
`FIG . 3
`
`LIBERTY EXHIBIT 1004, Page 3
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`

`

`Patent Application Publication
`
`Aug. 13 , 2020 Sheet 3 of 10
`
`US 2020/0256429 A1
`
`119
`
`105
`
`109
`
`121
`
`101
`
`123
`
`103
`
`117
`
`FIG . 4
`
`101
`
`121
`
`0
`
`109
`
`119
`
`105
`
`105
`
`123
`
`ICO
`
`117
`
`FIG . 5
`
`123
`
`I
`
`LIBERTY EXHIBIT 1004, Page 4
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`

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`Patent Application Publication
`
`Aug. 13 , 2020 Sheet 4 of 10
`
`US 2020/0256429 A1
`
`105
`
`125
`
`127
`
`105
`
`129
`
`149
`
`FIG . 6
`
`105
`
`123
`
`131
`
`131
`
`FIG . 7
`
`115
`
`edores
`
`FIG . 8
`
`LIBERTY EXHIBIT 1004, Page 5
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`

`

`Patent Application Publication
`
`Aug. 13 , 2020 Sheet 5 of 10
`
`US 2020/0256429 A1
`
`105
`
`111
`
`111
`
`105
`
`111
`
`131
`
`FIG . 9
`
`111
`
`145 bog
`
`123
`
`- 131
`
`111
`
`111
`
`FIG . 10
`
`LIBERTY EXHIBIT 1004, Page 6
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`

`

`Patent Application Publication
`
`Aug. 13 , 2020 Sheet 6 of 10
`
`US 2020/0256429 A1
`
`111
`
`123
`
`111
`
`137
`
`135
`
`133
`
`149
`
`115
`
`on BERR
`
`FIG . 11
`
`139
`
`115
`
`FIG . 12
`
`111
`
`135
`145
`
`111
`
`LIBERTY EXHIBIT 1004, Page 7
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`

`

`Patent Application Publication
`
`Aug. 13 , 2020 Sheet 7 of 10
`
`US 2020/0256429 A1
`
`111
`
`137
`
`?
`
`135
`
`E
`
`115
`
`2000.000
`
`CCM ACT
`
`3
`
`CSCE
`
`141
`
`TO AAAAAA
`
`133
`
`FIG . 13
`
`LIBERTY EXHIBIT 1004, Page 8
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`

`

`Patent Application Publication
`
`Aug. 13 , 2020 Sheet 8 of 10
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`US 2020/0256429 A1
`
`149
`
`115
`
`cm 147
`
`111
`
`137
`
`I
`
`141
`
`145
`
`143
`
`135
`
`133
`
`FIG . 14
`
`LIBERTY EXHIBIT 1004, Page 9
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`

`

`Patent Application Publication
`
`Aug. 13 , 2020 Sheet 9 of 10
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`US 2020/0256429 A1
`
`Example : Tick Over
`
`Example : 50 % Required
`
`Motor #
`
`Left Side
`
`Right Side
`
`1
`2
`3
`4 .
`5
`6
`7
`8
`9
`10
`11
`12
`13
`14
`
`On
`Off
`Off
`Off
`Off
`Off
`Off
`Off
`Off
`Off
`Off
`Off
`Off
`Off
`
`On
`Off
`Off
`Off
`Off
`Off
`Off
`Off
`Off
`Off
`Off
`Off
`Off
`Off
`
`FIG . 15
`
`Motor #
`
`Left Side
`
`Right Side
`
`1
`2
`3
`4
`5
`6
`7
`8
`9
`10
`11
`12
`13
`14
`
`Off
`On
`Off
`On
`Off
`On
`Off
`On
`Off
`On
`Off
`On
`Off
`On
`
`Off
`On
`Off
`On
`Off
`On
`Off
`On
`Off
`On
`Off
`On
`Off
`On
`
`FIG . 16
`
`LIBERTY EXHIBIT 1004, Page 10
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`

`

`Patent Application Publication
`
`Aug. 13 , 2020 Sheet 10 of 10 US 2020/0256429 A1
`
`Example : 100 % Required
`
`Example : 70 % Required
`
`Motor #
`
`Left Side
`
`Right Side
`
`1
`2
`3
`4
`5
`6
`7
`8
`9
`10
`11
`12
`13
`14
`
`On
`On
`On
`On
`On
`On
`On
`On
`On
`On
`On
`On
`On
`On
`
`On
`On
`On
`On
`On
`On
`On
`On
`On
`On
`On
`On
`On
`On
`
`FIG . 17
`
`Motor #
`
`Left Side
`
`Right Side
`
`1
`2
`3
`4
`5
`6
`7
`8
`9
`10
`11
`12
`13
`14
`
`Off
`On
`On
`On
`Off
`On
`On
`On
`Off
`On
`On
`On
`Off
`On
`
`Off
`On
`On
`On
`Off
`On
`On
`On
`Off
`On
`On
`On
`Off
`On
`
`FIG . 18
`
`LIBERTY EXHIBIT 1004, Page 11
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`

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`US 2020/0256429 A1
`
`Aug. 13 , 2020
`
`ELECTRIC DRIVE PUMP FOR WELL
`STIMULATION
`
`TECHNICAL FIELD
`The present application relates generally to hydrau
`[ 0001 ]
`lic fracturing in oil and gas wells , and in particular to an
`electric drive pump used to drive a fluid end for the pumping
`of a fracturing fluid into a well .
`DESCRIPTION OF THE PRIOR ART
`[ 0002 ] It is difficult to economically produce hydrocar
`bons from low permeability reservoir rocks . Oil and gas
`production rates are often boosted by hydraulic fracturing , a
`technique that increases rock permeability by opening chan
`nels through which hydrocarbons can flow to recovery
`wells . Hydraulic fracturing has been used for decades to
`stimulate production from conventional oil and gas wells .
`The practice consists of pumping fluid into a wellbore at
`high pressure ( sometimes as high as 50,000 PSI ) . Inside the
`wellbore , large quantities of proppants are carried in sus
`pension by the fracture fluid into the fractures . When the
`fluid enters the formation , it fractures , or creates fissures , in
`the formation . Water , as well as other fluids , and some solid
`proppants , are then pumped into the fissures to stimulate the
`release of oil and gas from the formation . When the pressure
`is released , the fractures partially close on the proppants ,
`leaving channels for oil and gas to flow .
`[ 0003 ] Fracturing rock in a formation requires that the
`fracture fluid be pumped into the well bore at very high
`pressure . This pumping is typically performed by large
`diesel - powered pumps in communication with one or more
`fluid ends . These specialized pumps are used to power the
`operation of the fluid end to deliver fracture fluids at
`sufficiently high rates and pressures to complete a hydraulic
`fracturing procedure or “ frac job . ” Such pumps are able to
`pump fracturing fluid into a well bore at a high enough
`pressure to crack the formation , but they also have draw
`backs . For example , the diesel pumps are very heavy , and
`thus must be moved on heavy duty trailers , making transport
`of the pumps between oilfield sites expensive and inefficient .
`In addition , the diesel engines required to drive the pumps
`require a relatively high level of expensive maintenance .
`Furthermore , the cost of diesel fuel is much higher than in
`the past , meaning that the cost of running the pumps has
`increased .
`[ 0004 ] To avoid the disadvantages of diesel - powered
`pumps , some have moved to another option , such as elec
`trically powered pumps . The electric frac pump configura
`tions available now are largely comprised of existing
`mechanical units that are integrated into an electric system .
`This practice , however , can limit an operation's efficiency
`and performance .
`[ 0005 ] Operators have at least two alternatives to choose
`from when in pursuit of a clean , electric power end pump .
`The first option offers a dual - motor configuration coupled
`with up to two triplex pumps . This large , industrial - sized ,
`and air - cooled system can be capable of 3600-4500 hydrau
`lic horsepower ( HHP ) . The second option is a single - motor
`configuration . The centrally located motor is connected by
`two quintuplex pumps via a through - spindle design . This
`larger unit is also air - cooled , and is capable of 6000 HHP .
`Existing electric configurations experience inefficiencies in
`certain key areas . Contemporary offerings for electric frac
`
`configurations are composed of existing components from
`mechanical systems that are repurposed for electric appli
`cations . These components were not specifically built for
`electric systems . Consequently , effective horsepower is
`decreased due to design conflicts introducing hydraulic and
`mechanical resistance , as well as accelerated wear cycles as
`a result of violent harmonics and misalignments in provi
`sional electric systems .
`[ 0006 ] The inefficiencies do not end there : air - cooling
`solutions often leave something to be desired , as they are not
`capable of regulating the temperatures the motors generate ,
`especially in environments where heat is a special concern .
`This leads to motors running hotter , and therefore , far less
`efficiently , which reduces the effective hydraulic horsepower
`of the entire operation . The inability to regulate running
`temperatures can also lead to premature failure .
`[ 0007 ] There are other concerns regarding the integration
`of existing mechanical components and electrics , such as the
`optimization of the ratios used by power end reduction
`gears . Electric motors are often mistakenly considered to
`produce the same results at any RPM . Even though they
`have flatter and more consistent torque and power curves
`than internal combustion solutions , this is not entirely true .
`Electric motors do perform best within a certain RPM range ,
`and contemporary offerings have not taken full advantage of
`the optimization that understanding provides . Reduction
`gear ratios that were not chosen for use in
`a specific
`electrical application , expose motors that drive them to
`possible premature failure , whether it be from spinning
`outside of the optimal range , or introducing harmonic imbal
`ances and damaging the powertrain as a whole .
`[ 0008 ] Although great strides have been made with respect
`to the power end of a fracturing pump system , there clearly
`is room left for improvement in electric drive pump fracing
`systems .
`
`SUMMARY OF THE INVENTION
`It is an object of the present application to provide
`[ 0009 ]
`an electric drive pump system for use in well stimulation .
`The electric drive pump system is configured to provide a
`plurality of individual motors in selective configurations that
`work together to provide power to a power end . The motors
`are arranged around a gearbox which is used to convert the
`rotary motion of the electric motors into linear motion for
`operation of the plungers in the fluid ends . The system
`includes a transmission assembly that is composed of the
`gearbox and the plurality of motors . The transmission
`assembly is detachable from any power end , and is operable
`with legacy power ends .
`[ 0010 ]
`It is a further object of the present application to
`include a temperature regulation system that is configured to
`provide means of regulating the temperature of the compo
`nents within the system . The temperature regulation system
`can be configured to provide both a heating effect and a
`cooling effect depending on configurations .
`[ 0011 ] Another object is to provide a control module for
`the monitoring and regulation of the various components .
`The control module may use any number of sensors to
`monitor operations . The motors may be regulated in their
`performance as well as the temperature regulation system .
`Communication to and from the control module may occur
`through wireless and / or wired means . Any number of input /
`output interfaces may be included to input and receive
`parameters and instructions .
`
`LIBERTY EXHIBIT 1004, Page 12
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`

`US 2020/0256429 A1
`
`2
`
`Aug. 13 , 2020
`
`[ 0012 ] Ultimately the invention may take many embodi
`ments beyond the exact depiction provided herein . This
`system overcomes the disadvantages inherent in the prior
`art .
`[ 0013 ] The more important features of the system have
`thus been outlined in order that the more detailed description
`that follows may be better understood and to ensure that the
`present contribution to the art is appreciated . Additional
`features of the system will be described hereinafter and will
`form the subject matter of the claims that follow .
`[ 0014 ] Many objects of the present system will appear
`from the following description and appended claims , refer
`ence being made to the accompanying drawings forming a
`part of this specification wherein like reference characters
`designate corresponding parts in the several views .
`[ 0015 ] Before explaining at least one embodiment of the
`system in detail , it is to be understood that the system is not
`limited in its application to the details of construction and
`the arrangements of the components set forth in the follow
`ing description or illustrated in the drawings . The system is
`capable of other embodiments and of being practiced and
`carried out in various ways . Also it is to be understood that
`the phraseology and terminology employed herein are for
`the purpose of description and should not be regarded as
`limiting .
`[ 0016 ] As such , those skilled in the art will appreciate that
`the conception , upon which this disclosure is based , may
`readily be utilized as a basis for the designing of other
`structures , methods and systems for carrying out the various
`purposes of the present system . It is important , therefore ,
`that the claims be regarded as including such equivalent
`constructions insofar as they do not depart from the spirit
`and scope of the present system .
`BRIEF DESCRIPTION OF THE DRAWINGS
`[ 0017 ] The novel features believed characteristic of the
`invention are set forth in the appended claims . However , the
`invention itself , as well as a preferred mode of use , and
`further objectives and advantages thereof , will best be
`understood by reference to the following detailed descrip
`tion when read in conjunction with the accompanying draw
`ings , wherein :
`[ 0018 ] FIG . 1 is a schematic of an electric drive pump
`system according to an embodiment of the present applica
`tion .
`[ 0019 ] FIG . 2 is a front perspective view of an electric
`drive pump in the electric drive pump system of FIG . 1 .
`[ 0020 ]
`FIG . 3 is a rear perspective view of the electric
`drive pump of FIG . 2 .
`[ 0021 ] FIG . 4 is a side view of the electric drive pump
`of
`FIG . 2 .
`[ 0022 ] FIG . 5 is a rear view of the electric drive pump of
`FIG . 2 .
`[ 0023 ] FIG . 6 is a front perspective view of a transmission
`assembly in the electric drive pump of FIG . 2 .
`[ 0024 ] FIG . 7 is a side view of the transmission assembly
`of FIG . 6 .
`[ 0025 ] FIG . 8 is a rear perspective view of the transmis
`sion assembly of FIG . 6 .
`[ 0026 ]
`FIG . 9 is an alternate front perspective view of the
`transmission assembly of FIG . 6 .
`[ 0027 ] FIG . 10 is a front view of the transmission assem
`bly of FIG . 9 .
`
`FIG . 11 is an interior side view of the transmission
`[ 0028 ]
`assembly of FIG . 9 .
`[ 0029 ] FIG . 12 is a rear perspective view of the transmis
`sion assembly of FIG . 11 .
`[ 0030 ] FIG . 13 is a side section view of the transmission
`assembly of FIG . 12 .
`[ 0031 ] FIG . 14 is a rear perspective view of the transmis
`sion assembly of FIG . 13 .
`[ 0032 ] FIGS . 15-18 are charts of the operative functioning
`of the electric motors in various different power demand
`conditions .
`[ 0033 ] While the application is susceptible to various
`modifications and alternative forms , specific embodiments
`thereof have been shown by way of example in the drawings
`and are herein described in detail . It should be understood ,
`however , that the description herein of specific embodiments
`is not intended to limit the application to the particular forms
`disclosed , but on the contrary , the intention is to cover all
`modifications , equivalents , and alternatives falling within
`the spirit and scope of the application as described herein .
`DESCRIPTION OF THE PREFERRED
`EMBODIMENT
`Illustrative embodiments of the preferred embodi
`[ 0034 ]
`ment are described below . In the interest of clarity , not all
`features of an actual implementation are described in this
`specification . It will of course be appreciated that in the
`development of any such actual embodiment , numerous
`implementation - specific decisions must be made to achieve
`the developer's specific goals , such as compliance with
`system - related and business - related constraints , which will
`vary from one implementation to another . Moreover , it will
`be appreciated that such a development effort might be
`complex and time - consuming but would nevertheless be a
`routine undertaking for those of ordinary skill in the art
`having the benefit of this disclosure .
`[ 0035 ]
`In the specification , reference may be made to the
`spatial relationships between various components and to the
`spatial orientation of various aspects of components as the
`devices are depicted in the attached drawings . However , as
`will be recognized by those skilled in the art after a complete
`reading of the present application , the devices , members ,
`apparatuses , etc. described herein may be positioned in any
`desired orientation . Thus , the use of terms to describe a
`spatial relationship between various components or to
`describe the spatial orientation of aspects of such compo
`nents should be understood to describe a relative relation
`ship between the components or a spatial orientation of
`aspects of such components , respectively , as the assembly
`described herein may be oriented in any desired direction .
`[ 0036 ] The system in accordance with the present appli
`cation overcomes one or more problems commonly associ
`ated with conventional pumps used to stimulate a well . The
`electric drive pump system of the present application is
`configured to incorporate a plurality of electric motors to the
`power end or pump portion of a pump system . The motors
`are configured to operate either collectively or indepen
`dently to vary the power supplied to the power end . The
`electric motors may operate in any combined manner and
`may operate in any sequential order . By including smaller
`motors , the motors are more easily obtained in the market ,
`precise power requirements may be met smoothly , and
`overall power consumption may be minimized . Addition
`ally , the electric drive pump system of the present applica
`
`LIBERTY EXHIBIT 1004, Page 13
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`US 2020/0256429 A1
`
`3
`
`Aug. 13 , 2020
`
`tion allows end - users to almost entirely eliminate hydrocar
`bon emissions by using clean - burning well gas turbines or
`local industrial power sources to fuel their operations . Noise
`pollution is also reduced by the removal of some of the
`loudest equipment on the pad , and electric configurations
`allow for cooling solutions that can be controlled to reduce
`or redirect most auditory nuisances . The electric drive pump
`system also has a smaller footprint on - pad than conventional
`pump systems . Maintenance is simplified to a considerable
`degree , since heavy , cumbersome mechanical power units
`are replaced with smaller , less complex electrical power
`units . These and other unique features of the device are
`discussed below and illustrated in the accompanying draw
`ings .
`[ 0037 ] The system will be understood , both as to its
`structure and operation , from the accompanying drawings ,
`taken in conjunction with the accompanying description .
`Several embodiments of the assembly may be presented
`herein . It should be understood that various components ,
`parts , and features of the different embodiments may be
`combined together and / or interchanged with one another , all
`of which are within the scope of the present application ,
`even though not all variations and particular embodiments
`are shown in the drawings . It should also be understood that
`the mixing and matching of features , elements , and / or
`functions between various embodiments is expressly con
`templated herein so that one of ordinary skill in the art would
`appreciate from this disclosure that the features , elements ,
`and / or functions of one embodiment may be incorporated
`into another embodiment as appropriate , unless otherwise
`described .
`[ 0038 ] The system of the present application is illustrated
`in the associated drawings . The assembly includes a portable
`base member that can roll along the ground . The base
`member defines an interior volume used for storage of
`various members and portions of the assembly . It also
`includes an elevating platform in communication with the
`base member . The elevating platform operates between a
`lowered position and an elevated position . The assembly is
`stabilized by one or more jacks and a hitch attachment
`assembly configured to secure the base member to the
`neighboring vehicle . Additional features and functions of the
`device are illustrated and discussed below .
`[ 0039 ] Referring now to the Figures wherein like refer
`ence characters identify corresponding or similar elements
`in form and function throughout the several views . The
`following Figures describe the assembly of the present
`application and its associated features . With reference now
`to the Figures , an embodiment of the electric drive pump
`system is herein described . It should be noted that the
`articles “ a ” , “ an ” , and “ the ” , as used in this specification ,
`include plural referents unless the content clearly dictates
`otherwise .
`[ 0040 ] Referring to FIG . 1 in the drawings , a schematic of
`an electric drive pump system for well stimulation through
`a power end is provided . The electric drive pump system 101
`includes a power end 103 , a transmission assembly 105 , a
`control module 107 and a temperature regulation assembly
`109. Power end 103 is configured to convert the rotational /
`rotary motion generated through transmission assembly 105
`into a linear motion for operation of plungers within one or
`more fluid ends . Power end 103 may have operate with any
`number of fluid ends and may be constructed from a casting
`or fabricated from one or more materials .
`
`Transmission assembly 105 is releasably mounted
`[ 0041 ]
`to power end 103 , and includes a plurality of electric motors
`111 and a gearbox 113 in communication with the plurality
`of electric motors . The gearbox 113 includes a plurality of
`gears for transferring rotational energy from the electric
`motors to the power end . Transmission assembly 105 also
`includes an output spline 115 in communication with gear
`box 113. Output spline 115 is configured to transfer rota
`tional energy from gearbox 113 to power end 103. In
`general , transmission assembly 105 is configured to hold the
`drive system ( motors 111 and gearing ) along with cooling
`components and sensors .
`[ 0042 ] System 101 also includes control module 107 con
`figured to regulate performance of the plurality of electric
`motors 111. Electrical power is provided to motors 111
`which in turn are used to induce a torque of selected power
`to rotate gears within gearbox 113. Control module 107 is
`used to monitor each motor's performance and control
`selected functions , such as power output , speed , on / off , unit
`temperature , and so forth . It is understood that these are
`exemplary in nature and do not form an exhaustive listing of
`performance characteristics or functions that module 107
`may regulate with respect to motors 111 or system 101 .
`Through control module 107 , operation of motors 111 can be
`done simultaneously as a group at a selected power level
`and / or independently wherein each motor 111 is independent
`of the operation of other motors 111 with respect to at least
`power output and runtime . Use of a plurality of motors 111
`allows for simplification of maintenance as one or more
`motors 111 may be turned off for maintenance while others
`remain on to maintain operation of power end 103 .
`[ 0043 ]
`It is understood that many different types of motors
`111 exist and are possible . For example , motors 111 may be
`AC or DC , single or multiple wound , brushed or brushless ,
`direct drive , servo or stepper motors . Another option is that
`motors 111 are rare earth magnet motors which have
`increased power density . Motors 111 may be powered via
`battery stacks or direct feed from a main power grid .
`Additionally , motors 111 may be powered off of waste gas
`from the sites . Ideally a DC power system is preferred .
`[ 0044 ] As seen in FIG . 1 , a plurality of transmission
`assemblies may be coupled to drive power end 103. Motors
`111 can be configured to operate in a clock - wise ( CW )
`direction or a counter clock - wise ( CCW ) direction so as to
`collectively rotate in the same direction relative to power
`end 103. Also seen in FIG . 1 , motors may be arranged in any
`manner within transmission assembly 105. One or more
`motor 111 may be in direct communication with gearing in
`gearbox 113. Subsequent or additional motors 111 used may
`be stacked behind an adjacent motor 111. In stacked con
`figurations , the stacked motors 111 work together in a
`prescribed fashion according to control module 107 to apply
`power to gearbox 113 at a single location .
`[ 0045 ] Temperature regulation assembly 109 is configured
`to regulate the temperature levels of various components and
`members of system 101. For example , temperature regula
`tion assembly 109 is configured to regulate the temperature
`of power end 103 and / or transmission assembly 105. Mod
`ule 107 is configured to operatively regulate performance of
`assembly 109. One or more sensors are located throughout
`system 101 and communicate temperature readings back to
`module 107 and / or assembly 109. Assembly 109 includes a
`radiator and a cooling fan and uses any type of working
`medium ( i.e. fluid ) to facilitate temperature regulation .
`
`LIBERTY EXHIBIT 1004, Page 14
`
`

`

`US 2020/0256429 Al
`
`4
`
`Aug. 13 , 2020
`
`Assembly 109 may use an oil based fluid or a water based
`fluid as the working medium .
`[ 0046 ] Additionally , assembly 109 is configured to pro
`vide both a cooling effect and a heating effect . For example ,
`to optimize the performance of system 101 , assembly 109
`can be used to heat critical components within system 101
`to a stable operating temperature before actuation of the
`system as a whole . Assembly 109 then may switch to a
`cooling mode to cool various components while in operation
`so as to keep the working medium temperature optimized .
`[ 0047 ] FIGS . 2-14 are provided to show an exemplary
`embodiment of system 101. This embodiment is not limited
`to the physical characteristics so depicted but can extend to
`other embodiments that are considered within the same
`functional scope and spirit of the present system .
`[ 0048 ] Referring now also to FIGS . 2-5 in the drawings ,
`views of electric drive pump system 101 is illustrated .
`System 101 is shown in a front perspective view in FIG . 2
`and a rear perspective view in FIG . 3. Power end 103 is
`situated between two transmission assemblies 103. Tem
`perature regulation assembly 109 is shown adjacent power
`end 103. Power end 103 and temperature regulation assem
`bly 109 are resting on a platform 117. Platform 117 is
`configured to elevate system 101 off the ground and provide
`for the overall stability of system
`101. Platform 117 is
`configured to enable mobility of system 101. System 101
`may be lifted by engaging platform 117 in one method .
`Other methods may involve pushing , pulling , or sliding for
`example . Platform 117 may be a skid , trailer , operate off of
`wheels , or consist of any mobile type of device . As seen in
`the Figures , a plurality of fasteners are used to couple
`transmission assembly 105 to power end 103. Assembly 105
`is detachable and interchangeable . During servicing , a single
`assembly 105 may be removed and replaced in a simple
`manner to avoid down time of the system .
`[ 0049 ] Temperature regulation assembly 109 is shown in
`more detail from the side view of FIG . 4 and the rear view
`of FIG . 5. Assembly 109 includes a radiator 119 and a fan
`121. Radiator 119 may include one or more cores with each
`core having the ability to cool a working medium to produce
`a cooling effect . This effect can be provided to motors 111 ,
`transmission assembly 105 , and power end 103. Any type of
`working medium may be used to pass within the core of
`radiator 119. It is understood that multiple cores may be
`used . They may be stacked together in any manner . Each of
`the plurality of cores may be either independent from one
`another or in fluid communication with each other . Inde
`pendent cores permit for the use of different working medi
`ums . Use of different mediums may assist in providing both
`heating and cooling via the same radiator . Fan 121 is
`configured to pass air onto radiator 119 so as to create an
`exchange of heat .
`[ 0050 ]
`It is worth noting as well that in FIGS . 4 and 5 the
`use of a circulation fan 123 is also seen in communication
`with transmission assembly 105. Fan 123 is configured to
`selectively pass air over motors 111 by having outside air
`( outside of transmission assembly 105 ) enter and mix within
`assembly 105. Fan 123 may work independent of assembly
`109 or in conjunction therewith . Module 107 may be used to
`regulate fan 123 .
`[ 0051 ] Referring now also to FIGS . 6-8 in the drawings ,
`assorted views of transmission assembly 105 are illustrated .
`AS noted previously , assembly 105 is detachable from
`power end 103. Transmission assembly 105 is depicted
`
`herein separated therefrom as a whole unit . Transmission
`assembly 105 is composed of a plurality of various compo
`nents and assemblies working together to provide the trans
`fer of rotational energy to power end 103. As seen in the side
`view of FIG . 7 , transmission assembly 105 includes a motor
`portion 125 , a gear reduction assembly 127 , and a planetary
`assembly 129. These general assemblies 125 and 127 are
`defined in their relative location in FIG . 7 and constitute
`gearbox 113. In the case of motor portion 125 , transmission
`housing 131 is a cover that surrounds motors 111. In FIG . 8 ,
`output spline 115 is shown . As motors 111 rotate gearing in
`gearbox 113 , output spline 115 rotates and drives power end
`103 .
`[ 0052 ] Referring now also to FIGS . 9 and 10 in the
`drawings , an alternate front perspective view and front view
`of transmission assembly 109 is illustrated . In these Figures ,
`a portion of housing 131 is removed for clarity and to permit
`a view of motors 111. Motors 111 are arranged in a radial
`manner about output spline 115. Fan 123 has been main
`tained for visual purposes .
`[ 0053 ] Referring now also to FIGS . 11-14 in the drawings ,
`assorted views of the gearing in transmission assembly 105
`is illustrated . FIG . 11 is an interior side view of transmission
`assembly 105 without housing 131 and covers associated
`with gearbox 113 so as to show the gearing being used .
`Planetary system 133 ( i.e. gears ) are illustrated adjacent
`output spline 115. A bull gear 135 is shown as being located
`between planetary system 133 and a spur gear arrangement
`137. Power from motors 111 pass to the spur gear 137 , to the
`bull gear , and then to the planetary system before being
`output through the output spline 115. A rear perspective view
`is shown in FIG . 12 and is provided for perspective . The gear
`reduction 139 is shown in more clarity .
`[ 0054 ]
`In particular with FIG . 13 in the drawings , a side
`section view of transmission assembly 105 , from FIG . 11 , is
`provided . In this view , each of the prior gearing is shown
`from the side and serves to enhance clarity in the gearing
`options . Planetary system 133 is understood to be suitable
`for any number of configurations . Output spline 115 con
`nects transmission assembly 105 to a crank shaft in power
`end 103. It is understood that this could also be facilitated
`through a key drive or flexible coupling arrangement .
`Motors 111 are shown in section view as well . A drive shaft
`141 is shown passing through the central part of motors 111 .
`Each motor engages shaft 141. Shaft 141 engages and
`contacts the spur gear 137. Also of note is the stacking
`capability of motors 111. As shown , three motors are stacked
`to one shaft 141 .
`[ 0055 ]
`In particular with FIG . 14 in the drawings , a rear
`persp