AU2012298577A1 - Dual motor pump for subsea application - Google Patents
Dual motor pump for subsea application Download PDFInfo
- Publication number
- AU2012298577A1 AU2012298577A1 AU2012298577A AU2012298577A AU2012298577A1 AU 2012298577 A1 AU2012298577 A1 AU 2012298577A1 AU 2012298577 A AU2012298577 A AU 2012298577A AU 2012298577 A AU2012298577 A AU 2012298577A AU 2012298577 A1 AU2012298577 A1 AU 2012298577A1
- Authority
- AU
- Australia
- Prior art keywords
- motor
- pump
- drive
- shaft
- motors
- 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.)
- Granted
Links
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
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/132—Submersible electric motors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Motor Or Generator Frames (AREA)
- Rotary Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
Abstract
Apparatus comprising: a pump (1) having a pump drive shaft (2) for operating the pump, a first motor (7) connected via a first flexible coupling (8) to drive one end of the shaft and a second motor (10) connected via a second flexible coupling (11) to drive the opposite end of the shaft; and a variable speed drive connecting each of the first and second motors electrically to drive the pump drive shaft.
Description
WO 2013/026775 PCT/EP2012/066043 DUAL MOTOR PUMP FOR SUBSEA APPLICATION Field of the Invention The present invention relates to a pump primarily for use 5 in subsea applications, particularly in the oil and gas industry. Background of the Invention Exploration for oil and gas reserves below the sea bed is 10 becoming more important as stocks of more accessible natural resources dwindle and it becomes necessary to explore deeper and more difficult areas. Extreme depths and longer distances require higher capacity pumping apparatus which must also be robust and able to withstand the high pressures prevalent under 15 the sea, and the difficult conditions encountered at significant depths of salt water. In recent years there has been a trend towards using larger pumps which require larger and stronger electrical motors but there is a limitation on how far this technology can be extended. In addition, any new 20 technology in this field must be extensively tested and must pass qualification regimes which are time consuming and thus result in delays in putting the technology into effect in the field. They also take up considerable personnel resources and are thus expensive. 25 Summary of the Invention According to the present invention there is provided apparatus comprising a pump having a pump drive shaft for operating the pump, a first motor connected via a first 30 flexible coupling to drive one end of the shaft and a second motor connected via a second flexible coupling to drive the opposite end of the shaft, and a variable speed drive connecting each of the first and second motors electrically to -1- WO 2013/026775 PCT/EP2012/066043 drive to the pump drive shaft. Preferably the variable speed drive is common to the first and the second motor. Electrical conductors for the motors can 5 be cited in an umbilical cord which can be common for both motors. The flexible couplings are preferably adapted to allow axial thermal expansion without affecting the operation of the 10 pump. The invention can provide a higher capacity pump unit using proven technology. This makes the pump more acceptable in the industry and more cost effective to implement because it 15 can be put into use without the delay and cost of undergoing complex regulatory qualification processes. In addition the reliability of the pump is likely to be higher compared to a revolutionary new pump because tried and tested components are used. It also has the advantage of that, if one motor should 20 fail, the other will still drive the pump albeit at reduced capacity. Brief Description of Drawing For a better understanding of the present invention, and 25 to show how the same may be carried into effect, reference will now be made to the accompanying drawing, in which: Figure 1 is a schematic cross section of a pump according to the present invention. 30 Detailed Description of Drawing A pump 1 comprises a pump shaft 2 which drives impellers 3. Fluid to be pumped enters the impeller section 3 via inlet -2- WO 2013/026775 PCT/EP2012/066043 17 and exits via outlet 18. The pump 1 is contained within a pump housing 4. The pump shaft 2 is mounted for axial rotation on bearing assemblies 5 and 6 located at opposed ends of the pump shaft 2. 5 A first electric motor 7 drives a first motor shaft 27 which is connected to one end of the pump shaft 2 via a first subsea motor coupling 8. The coupling is flexible and protected by a seal 9. A second electric motor 10 drives a 10 second motor shaft 28 which is connected to the other end of the pump shaft 2 by a second flexible coupling 11 protected by a seal 12. The flexible couplings 8, 11 transfer torque from the respective shafts to the pump shaft 2 but allow longitudinal movement to allow for thermal expansion. Suitable 15 flexible couplings may be achieved in many known ways. One example is to use an outer collar connected to one shaft by lock rings and to the other shaft by gear teeth which allow an axial sliding movement. 20 The motors 7 and 10 each comprise a stator 31 and a rotor 32 attached to the respective shaft 27 and 28. The electric motors 7 and 10 may be induction motors or permanent magnet motors. They are preferably liquid cooled by 25 a barrier fluid moving in either a single circuit or a double circuit (canned). The a barrier fluid protects the motors both from the pumped process fluid and the hostile surrounding environment which will typically be high pressure sea water. The barrier fluid isolates the motors preventing intrusion of 30 sea water and preventing contamination from the pumping fluid. It also provides lubrication for the motors and provides cooling by transporting heat away from the moving motor parts, e.g. the bearings. To achieve this the barrier fluid -3- WO 2013/026775 PCT/EP2012/066043 circulates in a closed circuit around the moving parts of the motor and the bearings and then the barrier fluid itself is cooled as it passes through pipes 30 around which sea water can circulate. The barrier fluid then passes back around the 5 moving motor parts again. The circulation of the barrier fluid is achieved using an internal circulation (impeller) pump. The barrier fluid also helps seal the dynamic seals in the motors and pump. These dynamic seals have one stationary part and one rotating part and the barrier fluid is kept at a pressure 10 slightly higher than the pressure of the process fluid being pumped so that a small amount of leakage of barrier fluid occurs into the process fluid. This prevents damage to the motors or pump by ingression of process fluid. It requires a constant supply of barrier fluid to the pump which is usually 15 supplied via an umbilical from the surface. The barrier fluid may be circulated in a double circuit if the motor contains a stator canning. Although not shown, this is a mechanical sleeve between the stator and the rotor which 20 allows a separate stator fluid to be used and isolates the stator from the barrier fluid. The magnetic flux passes through the stator canning but the stator fluid will not pass through. A typical double circuit solution is described in WO 2008/127119. It allows the motor-pump arrangement to be more 25 environmentally friendly since it allows more flexibility in the choice of barrier fluid and a specific stator fluid can be chosen to provide more dielectric properties for the stator, i.e. provide insulation for the stator. The stator fluid will also be cooled in a separate cooling circuit. A separate 30 stator fluid circuit also isolates the motor better since it prevents any contamination through the umbilical. The shaft 27 of the first motor 7 rotates in the opposite -4- WO 2013/026775 PCT/EP2012/066043 direction to the shaft 28 of the second motor 10. Power is supplied to the first motor 7 by power conductor line 13 via electrical connector 14, and to the second motor 10 5 by power conductor line 15 via electrical connector 16. A common power supply (not shown) may be used to supply power to both motors 7 and 10 and the power cables are preferably contained in an umbilical. 10 A variable speed drive may be used to control and change the frequency of the power supply so as to manage the speed of the pump, i.e. the number of revolutions of the pump shaft per minute. The variable speed drive may be situated topside or subsea and may be separate for each motor or common. 15 The first and second motor couplings 8 and 11 transfer torque from the respective motors to the pump shaft 2. Their flexibility is such as to allow axial expansion and contraction due to thermal changes and to accommodate different running 20 characteristics of the two motors. -5-
Claims (11)
1. Apparatus comprising: a pump having a pump drive shaft for operating the pump, a 5 first motor connected via a first flexible coupling to drive one end of the shaft and a second motor connected via a second flexible coupling to drive the opposite end of the shaft; and a variable speed drive connecting each of the first and second motors electrically to drive the pump drive shaft. 10
2. Apparatus according to claim 1 wherein the variable speed drive is common to the first and the second motor.
3. Apparatus according to claim 1 or 2 wherein at least the 15 first motor comprises an induction motor.
4. Apparatus according to any one of the preceding claims wherein the first and the second motors comprise induction motors. 20
5. Apparatus according to claim 1 or 2 wherein at least the first motor comprises a permanent magnet motor.
6. Apparatus according to claim 5 wherein both the first and 25 second motors comprise a permanent magnet motor.
7. Apparatus according to any one of the preceding claims wherein at least the first motor is liquid cooled. 30
8. Apparatus according to claim 7 wherein the motor is liquid cooled by a barrier fluid moving in a single circuit. -6- WO 2013/026775 PCT/EP2012/066043
9. Apparatus according to claim 7 wherein the motor comprises a stator canning comprising a mechanical sleeve and a stator barrier fluid. 5
10. Apparatus according to claim 9 wherein the motor barrier fluid moves in a double circuit.
11. Apparatus according to any one of the preceding claims wherein the flexible couplings are adapted to allow axial 10 expansion. -7-
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1114594.3A GB2493938B (en) | 2011-08-23 | 2011-08-23 | Double motor pump with variable speed drive |
GB1114594.3 | 2011-08-23 | ||
PCT/EP2012/066043 WO2013026775A1 (en) | 2011-08-23 | 2012-08-16 | Dual motor pump for subsea application |
Publications (2)
Publication Number | Publication Date |
---|---|
AU2012298577A1 true AU2012298577A1 (en) | 2014-03-13 |
AU2012298577B2 AU2012298577B2 (en) | 2017-02-23 |
Family
ID=44800796
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2012298577A Expired - Fee Related AU2012298577B2 (en) | 2011-08-23 | 2012-08-16 | Dual motor pump for subsea application |
Country Status (7)
Country | Link |
---|---|
US (1) | US20140205475A1 (en) |
AU (1) | AU2012298577B2 (en) |
BR (1) | BR112014004152A2 (en) |
GB (1) | GB2493938B (en) |
NO (1) | NO340425B1 (en) |
SG (1) | SG11201400121XA (en) |
WO (1) | WO2013026775A1 (en) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11255173B2 (en) | 2011-04-07 | 2022-02-22 | Typhon Technology Solutions, Llc | Mobile, modular, electrically powered system for use in fracturing underground formations using liquid petroleum gas |
US11708752B2 (en) | 2011-04-07 | 2023-07-25 | Typhon Technology Solutions (U.S.), Llc | Multiple generator mobile electric powered fracturing system |
US9140110B2 (en) | 2012-10-05 | 2015-09-22 | Evolution Well Services, Llc | Mobile, modular, electrically powered system for use in fracturing underground formations using liquid petroleum gas |
US10020711B2 (en) | 2012-11-16 | 2018-07-10 | U.S. Well Services, LLC | System for fueling electric powered hydraulic fracturing equipment with multiple fuel sources |
US10119381B2 (en) | 2012-11-16 | 2018-11-06 | U.S. Well Services, LLC | System for reducing vibrations in a pressure pumping fleet |
US10378335B2 (en) * | 2013-03-13 | 2019-08-13 | Schlumberger Technology Corporation | Pressure testing of well servicing systems |
US10087938B2 (en) * | 2013-10-18 | 2018-10-02 | Regal Beloit America, Inc. | Pump, associated electric machine and associated method |
US11085450B2 (en) | 2013-10-18 | 2021-08-10 | Regal Beloit America, Inc. | Pump having a housing with internal and external planar surfaces defining a cavity with an axial flux motor driven impeller secured therein |
NO337348B1 (en) * | 2014-08-18 | 2016-03-21 | Aker Subsea As | VARIETY SPEED OPERATING VARIABLE SPEED FOR LARGE PUMPS AND COMPRESSORS. |
US9995119B2 (en) | 2015-11-16 | 2018-06-12 | Ge Oil & Gas Esp, Inc. | Electric submersible pumping system with permanent magnet motor |
US10859084B2 (en) * | 2016-04-26 | 2020-12-08 | Onesubsea Ip Uk Limited | Subsea process lubricated water injection pump |
WO2018089173A1 (en) * | 2016-11-14 | 2018-05-17 | Chevron U.S.A. Inc. | Subsea variable frequency drive and motor assembly |
US11162497B2 (en) * | 2017-11-13 | 2021-11-02 | Onesubsea Ip Uk Limited | System for moving fluid with opposed axial forces |
US10914155B2 (en) | 2018-10-09 | 2021-02-09 | 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 |
WO2020231483A1 (en) | 2019-05-13 | 2020-11-19 | U.S. Well Services, LLC | Encoderless vector control for vfd in hydraulic fracturing applications |
US11542786B2 (en) | 2019-08-01 | 2023-01-03 | U.S. Well Services, LLC | High capacity power storage system for electric hydraulic fracturing |
US20220252071A1 (en) * | 2021-02-09 | 2022-08-11 | Onesubsea Ip Uk Limited | Subsea electric fluid processing machine |
WO2024012454A1 (en) * | 2022-07-12 | 2024-01-18 | 青岛三利智能动力有限公司 | Intelligent dual drive pump and water supply system |
US11955782B1 (en) | 2022-11-01 | 2024-04-09 | Typhon Technology Solutions (U.S.), Llc | System and method for fracturing of underground formations using electric grid power |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3274795A (en) * | 1964-04-30 | 1966-09-27 | Little Inc A | Fluid operating apparatus |
DE4318707A1 (en) * | 1993-06-04 | 1994-12-08 | Sihi Gmbh & Co Kg | Displacement machine with electronic motor synchronization |
DE59603933D1 (en) * | 1995-08-24 | 2000-01-20 | Sulzer Electronics Ag Winterth | ELECTRIC MOTOR |
ES2172437B1 (en) * | 2000-11-03 | 2003-12-01 | Bogemar Sl | SUBMERSIBLE MULTICELLULAR PUMP. |
JP2005171825A (en) * | 2003-12-09 | 2005-06-30 | Ebara Corp | Fluid conveyance machine |
US7164242B2 (en) * | 2004-02-27 | 2007-01-16 | York International Corp. | Variable speed drive for multiple loads |
US20070110595A1 (en) * | 2004-12-06 | 2007-05-17 | Ebara Corporation | Fluid conveying machine |
NO330192B1 (en) | 2007-04-12 | 2011-03-07 | Framo Eng As | Fluid Pump System. |
US8777596B2 (en) * | 2008-05-06 | 2014-07-15 | Fmc Technologies, Inc. | Flushing system |
DE102008022618A1 (en) * | 2008-05-07 | 2009-12-31 | Siemens Aktiengesellschaft | Power supply means |
US8299646B2 (en) * | 2009-07-27 | 2012-10-30 | Rocky Research | HVAC/R system with variable frequency drive (VFD) power supply for multiple motors |
EP2633197A4 (en) * | 2010-10-27 | 2016-08-03 | Dresser Rand Co | Multiple motor drivers for a hermetically-sealed motor-compressor system |
-
2011
- 2011-08-23 GB GB1114594.3A patent/GB2493938B/en not_active Expired - Fee Related
-
2012
- 2012-08-16 WO PCT/EP2012/066043 patent/WO2013026775A1/en active Application Filing
- 2012-08-16 AU AU2012298577A patent/AU2012298577B2/en not_active Expired - Fee Related
- 2012-08-16 SG SG11201400121XA patent/SG11201400121XA/en unknown
- 2012-08-16 BR BR112014004152A patent/BR112014004152A2/en not_active IP Right Cessation
- 2012-08-16 US US14/239,989 patent/US20140205475A1/en not_active Abandoned
-
2014
- 2014-03-04 NO NO20140275A patent/NO340425B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
SG11201400121XA (en) | 2014-03-28 |
GB201114594D0 (en) | 2011-10-05 |
WO2013026775A1 (en) | 2013-02-28 |
BR112014004152A2 (en) | 2017-02-21 |
AU2012298577B2 (en) | 2017-02-23 |
NO20140275A1 (en) | 2014-03-24 |
NO340425B1 (en) | 2017-04-18 |
GB2493938A (en) | 2013-02-27 |
GB2493938B (en) | 2014-08-13 |
US20140205475A1 (en) | 2014-07-24 |
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