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US20130078114A1 - Phase shift controller for a reciprocating pump system - Google Patents

Phase shift controller for a reciprocating pump system Download PDF

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Publication number
US20130078114A1
US20130078114A1 US13/639,929 US201113639929A US2013078114A1 US 20130078114 A1 US20130078114 A1 US 20130078114A1 US 201113639929 A US201113639929 A US 201113639929A US 2013078114 A1 US2013078114 A1 US 2013078114A1
Authority
US
United States
Prior art keywords
pump
phase shift
phase
control device
shift control
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.)
Abandoned
Application number
US13/639,929
Other languages
English (en)
Inventor
Rudolfus Johannes Adeleida Van Rijswick
Felix Johannes Jacobus Van Osch
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.)
Weir Minerals Netherlands BV
Original Assignee
Weir Minerals Netherlands BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from NL2004979A external-priority patent/NL2004979C2/en
Application filed by Weir Minerals Netherlands BV filed Critical Weir Minerals Netherlands BV
Priority to US13/639,929 priority Critical patent/US20130078114A1/en
Assigned to WEIR MINERALS NETHERLANDS B.V. reassignment WEIR MINERALS NETHERLANDS B.V. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VAN RIJSWICK, RUDOLFUS JOHANNES ADELEIDA, VAN OSCH, FELIX JOHANNES JACOBUS
Publication of US20130078114A1 publication Critical patent/US20130078114A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/005—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons
    • F04B11/0075—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons connected in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/06—Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/007—Installations or systems with two or more pumps or pump cylinders, wherein the flow-path through the stages can be changed, e.g. from series to parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed

Definitions

  • Disclosed embodiments relate generally to pumps and more particularly to multiple reciprocating positive displacement pumps for handling mineral slurries.
  • Reciprocating positive displacement pumps are used for pumping fluid against relatively high pressure, when compared to single stage centrifugal pumps, for example. Further characteristics of such positive displacement pumps include high efficiency and an accurate flow output, but a relatively low flow capacity when compared to centrifugal pumps.
  • more positive displacement pumps can be arranged in parallel such that their suction and/or discharge connections are connected into a single suction and/or discharge line. This means that the sum flow of the individual pumps can meet the total flow requirements of the application.
  • the combination of the individual pumps and the interconnecting suction and discharge lines forms a pump system.
  • a displacement element such as a piston or plunger makes a reciprocating motion inside a cylinder liner enabling the positive displacement the fluid to be pumped.
  • the reciprocating motion of the displacement element is generated by a mechanism which transfers the rotating motion of the pump drive into a reciprocating motion of the displacement element.
  • this mechanism may include crankshaft, eccentric shaft, camshaft or cam disc mechanisms.
  • Disclosed embodiments provide a solution for the described shortcomings of the phase shift control systems of the prior art crankshaft-driven positive displacement pumps.
  • a real pump is used as a master in a master/slave control scheme for controlling the phase shift between the master and slave pump.
  • the drawbacks included the complex master/slave scheduling procedures, the reduced reliability of the pump system as it depends on the reliability of a single master pump, and the reduced performance of the entire pump system in case of an unstable master pump operation.
  • a pump system using multiple-reciprocating, positive displacement pumps which phase shift is controlled by a phase shift controller.
  • the phase shift controller uses a virtual master pump inside the phase shift controller which is used as a phase reference against which the phase shifts of the individual pumps is calculated.
  • the phase shift controller adjusts the speed reference set-point for the variable speed drives of the individual pumps such that a desired phase shift is obtained and maintained.
  • the operation of multiple reciprocating pumps using phase shift control can significantly reduce the pressure pulsation levels in the pump system.
  • the use of a virtual master pump eliminates master slave scheduling and increases system reliability and availability as is the operating of the phase control is not depending on the reliability of a real master pump as is the case in prior art phase shift controllers.
  • the virtual master pump creates a phase reference signal within the phase shift controller based on a single pump system reference speed set-point just as a real master pump would do. All the real pumps in the pump system act as slaves in the phase shift controller. The phase of each individual pump is compared to the phase of the virtual master pump inside the controller which is then used as an input for the phase shift control.
  • FIG. 4 a control flow diagram for the virtual master phase shift controller is shown.
  • a virtual master pump can provide some operational improvements over the known prior art crankshaft-driven, positive displacement phase shift control systems.
  • the slave pumps are always referenced against the same virtual master pump, hence no scheduling is required.
  • the virtual master pump is considered to be available at all times as it does not require maintenance and has a much higher reliability than a real mechanical pump.
  • the speed of the master pump is stable at all times since it is not influenced by the performance of a single master pump, which is especially useful when a positive displacement pump is used for pumping abrasive slurries in the mining and mineral processing industry.
  • the disclosure is not limited to triplex single acting positive displacement pumps but applies to all single or multi cylinder single and double acting positive displacement pumps.
  • FIG. 1 illustrates a schematic cross section of a prior art triplex single acting positive displacement pump, also showing a disclosed embodiment using an intermediate fluid and an additional flexible displacement element;
  • FIG. 2 illustrates a triplex single acting positive displacement pump flow pulsation of the prior art
  • FIG. 3 illustrates a prior art control flow diagram of reciprocating pump phase control with a master-slave control scheme using a real pump as master
  • FIG. 4 illustrates a control flow diagram of reciprocating pump phase control with a master-slave control scheme using a virtual master, in accordance with disclosed embodiments.
  • crankshaft driven positive displacement pump a schematic cross section of a 3-cylinder or triplex single acting crankshaft driven positive displacement pump is shown.
  • the displacement element can directly displace the pumped fluid or displace an intermediate fluid which displaces a flexible displacement element which displaces the pumped fluid, such as an abrasive slurry.
  • the disclosure applies to an embodiment of a positive displacement pump, but as the improvement is of particular interest to positive slurry pumps as described below, the embodiment using an intermediate fluid and flexible displacement as specifically shown in FIG. 1 .
  • crankshaft-driven positive displacement pump A typical characteristic of the crankshaft-driven positive displacement pump is the non-constant reciprocating velocity of the displacement element. Crankshaft-driven positive displacement pumps therefore inherently generate a non-constant flow or flow pulsation each crankshaft revolution.
  • FIG. 2 a typical flow pulsation generated during one crankshaft revolution or pump cycle of a triplex single-acting positive displacement pump is shown.
  • these flow pulsations can result in pressure pulsations in the pumped fluid which can result in vibration of the piping and its support structure through which the fluid is flowing, and the pressure pulsations can create an unbalanced load in the piping system.
  • crankshaft-driven positive displacement pump When more than one crankshaft-driven positive displacement pump is connected to a single suction and/or discharge inlet or outlet, an interaction between the flow pulsations generated by the individual pumps can occur. This interaction can cancel out or increase the total level of flow and pressure pulsations in the pump system, again depending on the hydraulic response of the connected system. Also, hydraulic resonances present in the pump system can be excited by the flow pulsations generated by each individual pump.
  • An important parameter which determines the total flow and pressure pulsation in a given pump system is the phase shift between the crankshafts of the individual pumps. Controlling this phase shift can therefore help in controlling the flow and pressure pulsation in a given pump system using crankshaft-driven positive displacement pumps.
  • phase shift control also referred to as pump synchronization
  • the phase shift control requires pumps equipped with variable speed drives (VSD) which can be used to adjust and maintain the phase shift between the pumps by speed adjustments of the individual drives.
  • VSD variable speed drives
  • the individual pump and/or their drives are equipped with a phase sensor which indicates the position of the pump cycle of the individual pump, further referred to as phase of the individual pump.
  • phase information is then used by the phase shift calculator to calculate the phase shifts between the individual pumps, which then is used by the phase shift controller to adjust the speed of the individual pumps such that the phase shift is adjusted towards or maintained at the desired phase shift.
  • one pump in the pump system is assigned as the master pump.
  • This master pump follows the pump system speed reference set-point without any adjustments for phase shift control.
  • the other pumps are assigned as slaves who have to follow the master pump.
  • the phase shift controller calculates the phase difference between the master and each slave pump and generates a speed set-point for each individual slave pump which is based on the phase shift between the master and the individual slave pump, such that a the constant and desired phase shift between the master and slave pump is obtained and maintained.
  • Embodiments known and used in prior art are normally limited to three or four pumps per pump system, and for which the master/slave scheduling procedures are relatively easy. Furthermore the total flow rate of prior art pump systems with phase shift control are limited so that the system can still operate reliably because unbalanced loads generated by the pressure pulsations are relatively low and can still be acceptable in some applications.
  • the present disclosure includes several embodiments for the individual parts of the phase shift controller. For completeness, a listing of some embodiments is given:
  • variable speed drive is not limited to a particular embodiment of the used variable speed drive, however the following embodiments are mentioned in particular:
  • phase shift controller is not limited to a particular embodiment of the phase shift controller, however, the following embodiments are mentioned in particular:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Transmission Device (AREA)
US13/639,929 2010-04-07 2011-04-05 Phase shift controller for a reciprocating pump system Abandoned US20130078114A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/639,929 US20130078114A1 (en) 2010-04-07 2011-04-05 Phase shift controller for a reciprocating pump system

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US32160110P 2010-04-07 2010-04-07
NL2004979 2010-06-28
NL2004979A NL2004979C2 (en) 2010-04-07 2010-06-28 Phase shift controller for a reciprocating pump system.
PCT/NL2011/050230 WO2011126367A2 (en) 2010-04-07 2011-04-05 Phase shift controller for a reciprocating pump system.
US13/639,929 US20130078114A1 (en) 2010-04-07 2011-04-05 Phase shift controller for a reciprocating pump system

Publications (1)

Publication Number Publication Date
US20130078114A1 true US20130078114A1 (en) 2013-03-28

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US13/639,929 Abandoned US20130078114A1 (en) 2010-04-07 2011-04-05 Phase shift controller for a reciprocating pump system

Country Status (11)

Country Link
US (1) US20130078114A1 (zh)
CN (1) CN102893028B (zh)
AR (1) AR080839A1 (zh)
AU (1) AU2011239051B2 (zh)
CA (1) CA2795538C (zh)
DE (1) DE112011101269B4 (zh)
MX (1) MX2012011512A (zh)
PE (1) PE20130791A1 (zh)
RU (1) RU2012147256A (zh)
TW (1) TW201207236A (zh)
WO (1) WO2011126367A2 (zh)

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US20190195020A1 (en) * 2016-09-16 2019-06-27 Robert Bosch Gmbh Rotary Electrohydraulic Actuator
US10705554B2 (en) 2017-04-28 2020-07-07 Graco Minnesota Inc. Solenoid valve for a portable hydraulic power unit
US11149725B2 (en) 2016-01-20 2021-10-19 Weir Minerals Netherlands B.V. Hydraulic pump system for handling a slurry medium
US11306707B2 (en) * 2018-09-13 2022-04-19 Nuovo Pignone Tecnologie—S.R.L. Method for reducing the pulsation level in a multi-compressor plant employing reciprocating compressors
US11434737B2 (en) 2017-12-05 2022-09-06 U.S. Well Services, LLC High horsepower pumping configuration for an electric hydraulic fracturing system
US11451016B2 (en) 2012-11-16 2022-09-20 U.S. Well Services, LLC Switchgear load sharing for oil field equipment
US11449018B2 (en) 2012-11-16 2022-09-20 U.S. Well Services, LLC System and method for parallel power and blackout protection for electric powered hydraulic fracturing
US11454170B2 (en) 2012-11-16 2022-09-27 U.S. Well Services, LLC Turbine chilling for oil field power generation
US11454079B2 (en) 2018-09-14 2022-09-27 U.S. Well Services Llc Riser assist for wellsites
US11459863B2 (en) 2019-10-03 2022-10-04 U.S. Well Services, LLC Electric powered hydraulic fracturing pump system with single electric powered multi-plunger fracturing pump
US11476781B2 (en) 2012-11-16 2022-10-18 U.S. Well Services, LLC Wireline power supply during electric powered fracturing operations
US11506126B2 (en) 2019-06-10 2022-11-22 U.S. Well Services, LLC Integrated fuel gas heater for mobile fuel conditioning equipment
USD977426S1 (en) 2019-12-13 2023-02-07 Graco Minnesota Inc. Hydraulic power pack
US11578577B2 (en) 2019-03-20 2023-02-14 U.S. Well Services, LLC Oversized switchgear trailer for electric hydraulic fracturing
US11674352B2 (en) 2012-11-16 2023-06-13 U.S. Well Services, LLC Slide out pump stand for hydraulic fracturing equipment
US11713661B2 (en) 2012-11-16 2023-08-01 U.S. Well Services, LLC Electric powered pump down
US11728709B2 (en) 2019-05-13 2023-08-15 U.S. Well Services, LLC Encoderless vector control for VFD in hydraulic fracturing applications
US11850563B2 (en) 2012-11-16 2023-12-26 U.S. Well Services, LLC Independent control of auger and hopper assembly in electric blender system
US11959533B2 (en) 2017-12-05 2024-04-16 U.S. Well Services Holdings, Llc Multi-plunger pumps and associated drive systems
US12078110B2 (en) 2015-11-20 2024-09-03 Us Well Services, Llc System for gas compression on electric hydraulic fracturing fleets
US12092095B2 (en) 2016-12-02 2024-09-17 Us Well Services, Llc Constant voltage power distribution system for use with an electric hydraulic fracturing system
US12116875B2 (en) 2018-10-09 2024-10-15 U.S. Well Services, LLC Electric powered hydraulic fracturing pump system with single electric powered multi-plunger pump fracturing trailers, filtration units, and slide out platform
US12142928B2 (en) 2018-06-15 2024-11-12 U.S. Well Services, LLC Integrated mobile power unit for hydraulic fracturing
US12152711B2 (en) 2019-12-27 2024-11-26 U.S. Well Services, LLC System and method for integrated flow supply line
US12221872B2 (en) 2014-10-14 2025-02-11 U.S. Well Services, LLC System and method for parallel power and blackout protection for electric powered hydraulic fracturing
US12241353B2 (en) 2019-12-31 2025-03-04 U.S. Well Services, LLC Self-regulating frac pump suction stabilizer/dampener
US12359548B2 (en) 2019-12-30 2025-07-15 U.S. Well Services, LLC Electric motor driven transportation mechanisms for fracturing blenders
US12509974B2 (en) 2019-12-27 2025-12-30 U.S. Well Services, LLC Systems and methods for fluid end health monitoring

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AU2016229643B2 (en) * 2015-03-09 2020-10-01 Weir Minerals Netherlands B.V. Hydraulic pump system for handling a slurry medium
NL2019357B1 (en) 2017-07-27 2019-02-18 Weir Minerals Netherlands Bv Pump system for handling a slurry medium
CN112727752B (zh) * 2020-12-28 2022-10-14 广东拓斯达科技股份有限公司 一种多泵合流的流量脉动消除方法和装置

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US11713661B2 (en) 2012-11-16 2023-08-01 U.S. Well Services, LLC Electric powered pump down
US11449018B2 (en) 2012-11-16 2022-09-20 U.S. Well Services, LLC System and method for parallel power and blackout protection for electric powered hydraulic fracturing
US11850563B2 (en) 2012-11-16 2023-12-26 U.S. Well Services, LLC Independent control of auger and hopper assembly in electric blender system
US11674352B2 (en) 2012-11-16 2023-06-13 U.S. Well Services, LLC Slide out pump stand for hydraulic fracturing equipment
US11476781B2 (en) 2012-11-16 2022-10-18 U.S. Well Services, LLC Wireline power supply during electric powered fracturing operations
US12438480B2 (en) 2012-11-16 2025-10-07 U.S. Well Services, LLC Wireline power supply during electric powered fracturing operations
US11454170B2 (en) 2012-11-16 2022-09-27 U.S. Well Services, LLC Turbine chilling for oil field power generation
US11451016B2 (en) 2012-11-16 2022-09-20 U.S. Well Services, LLC Switchgear load sharing for oil field equipment
US12221872B2 (en) 2014-10-14 2025-02-11 U.S. Well Services, LLC System and method for parallel power and blackout protection for electric powered hydraulic fracturing
US12085017B2 (en) 2015-11-20 2024-09-10 Us Well Services, Llc System for gas compression on electric hydraulic fracturing fleets
US12078110B2 (en) 2015-11-20 2024-09-03 Us Well Services, Llc System for gas compression on electric hydraulic fracturing fleets
US11149725B2 (en) 2016-01-20 2021-10-19 Weir Minerals Netherlands B.V. Hydraulic pump system for handling a slurry medium
US20190195020A1 (en) * 2016-09-16 2019-06-27 Robert Bosch Gmbh Rotary Electrohydraulic Actuator
US10982743B2 (en) * 2016-09-16 2021-04-20 Bosch Rexroth Corporation Rotary electrohydraulic actuator
US12092095B2 (en) 2016-12-02 2024-09-17 Us Well Services, Llc Constant voltage power distribution system for use with an electric hydraulic fracturing system
US11441551B2 (en) 2017-04-28 2022-09-13 Graco Minnesota Inc. Portable hydraulic power unit
US11162482B2 (en) 2017-04-28 2021-11-02 Graco Minnesota Inc. Portable hydraulic power unit having a pump fixed to an exterior side of a fluid supply tank
US10705554B2 (en) 2017-04-28 2020-07-07 Graco Minnesota Inc. Solenoid valve for a portable hydraulic power unit
US11434737B2 (en) 2017-12-05 2022-09-06 U.S. Well Services, LLC High horsepower pumping configuration for an electric hydraulic fracturing system
US12448877B2 (en) 2017-12-05 2025-10-21 U.S. Well Services, LLC High horsepower pumping configuration for an electric hydraulic fracturing system
US11959533B2 (en) 2017-12-05 2024-04-16 U.S. Well Services Holdings, Llc Multi-plunger pumps and associated drive systems
US12142928B2 (en) 2018-06-15 2024-11-12 U.S. Well Services, LLC Integrated mobile power unit for hydraulic fracturing
US11306707B2 (en) * 2018-09-13 2022-04-19 Nuovo Pignone Tecnologie—S.R.L. Method for reducing the pulsation level in a multi-compressor plant employing reciprocating compressors
US11454079B2 (en) 2018-09-14 2022-09-27 U.S. Well Services Llc Riser assist for wellsites
US12116875B2 (en) 2018-10-09 2024-10-15 U.S. Well Services, LLC Electric powered hydraulic fracturing pump system with single electric powered multi-plunger pump fracturing trailers, filtration units, and slide out platform
US12428942B2 (en) 2019-03-20 2025-09-30 U.S. Well Services, LLC Oversized switchgear trailer for electric hydraulic fracturing
US11578577B2 (en) 2019-03-20 2023-02-14 U.S. Well Services, LLC Oversized switchgear trailer for electric hydraulic fracturing
US12494695B2 (en) 2019-05-13 2025-12-09 U.S. Well Services, LLC Encoderless vector control for VFD in hydraulic fracturing applications
US11728709B2 (en) 2019-05-13 2023-08-15 U.S. Well Services, LLC Encoderless vector control for VFD in hydraulic fracturing applications
US11506126B2 (en) 2019-06-10 2022-11-22 U.S. Well Services, LLC Integrated fuel gas heater for mobile fuel conditioning equipment
US11459863B2 (en) 2019-10-03 2022-10-04 U.S. Well Services, LLC Electric powered hydraulic fracturing pump system with single electric powered multi-plunger fracturing pump
US11905806B2 (en) 2019-10-03 2024-02-20 U.S. Well Services, LLC Electric powered hydraulic fracturing pump system with single electric powered multi-plunger fracturing pump
US12084952B2 (en) 2019-10-03 2024-09-10 U.S. Well Services, LLC Electric powered hydraulic fracturing pump system with single electric powered multi-plunger fracturing pump
US12516591B2 (en) 2019-10-03 2026-01-06 U.S. Well Services, LLC Electric powered hydraulic fracturing pump system with single electric powered multi-plunger fracturing pump
USD977426S1 (en) 2019-12-13 2023-02-07 Graco Minnesota Inc. Hydraulic power pack
US12152711B2 (en) 2019-12-27 2024-11-26 U.S. Well Services, LLC System and method for integrated flow supply line
US12509974B2 (en) 2019-12-27 2025-12-30 U.S. Well Services, LLC Systems and methods for fluid end health monitoring
US12359548B2 (en) 2019-12-30 2025-07-15 U.S. Well Services, LLC Electric motor driven transportation mechanisms for fracturing blenders
US12241353B2 (en) 2019-12-31 2025-03-04 U.S. Well Services, LLC Self-regulating frac pump suction stabilizer/dampener

Also Published As

Publication number Publication date
MX2012011512A (es) 2012-11-29
CA2795538C (en) 2018-02-20
WO2011126367A2 (en) 2011-10-13
DE112011101269B4 (de) 2021-05-06
DE112011101269T5 (de) 2013-05-02
CN102893028A (zh) 2013-01-23
AU2011239051B2 (en) 2015-12-24
AU2011239051A1 (en) 2012-11-01
RU2012147256A (ru) 2014-05-27
WO2011126367A3 (en) 2015-07-02
CA2795538A1 (en) 2011-10-13
PE20130791A1 (es) 2013-07-25
TW201207236A (en) 2012-02-16
CN102893028B (zh) 2016-09-28
AR080839A1 (es) 2012-05-09

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