GB2215408A - Method and system for controlling the gas-liquid ratio in a pump - Google Patents
Method and system for controlling the gas-liquid ratio in a pump Download PDFInfo
- Publication number
- GB2215408A GB2215408A GB8804729A GB8804729A GB2215408A GB 2215408 A GB2215408 A GB 2215408A GB 8804729 A GB8804729 A GB 8804729A GB 8804729 A GB8804729 A GB 8804729A GB 2215408 A GB2215408 A GB 2215408A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pump
- gas
- liquid
- extractor
- controlling
- 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
- 239000007788 liquid Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims description 14
- 239000012530 fluid Substances 0.000 claims abstract description 40
- 230000001105 regulatory effect Effects 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 11
- 230000001276 controlling effect Effects 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 36
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000003921 oil Substances 0.000 description 4
- 238000000605 extraction Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- -1 condensates Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- F04D31/00—Pumping liquids and elastic fluids at the same time
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/40—Separation associated with re-injection of separated materials
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/005—Pipe-line systems for a two-phase gas-liquid flow
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/36—Underwater separating arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Jet Pumps And Other Pumps (AREA)
- Reciprocating Pumps (AREA)
- Nozzles (AREA)
Abstract
The gas-liquid ratio of a multiphase fluid in a pump is controlled by extracting liquid from the fluid stream exhausted by the pump (1) and reclrculating through a conduit (9) the extracted liquid back to the pump inlet (5) if the gas content of the pumped fluid exceeds a certain value. Detection means (12) controls a flow regulating device (10) in the conduit (9) and when an unacceptably high gas content is detected device (10) is opened to admit liquid to the inlet (5). <IMAGE>
Description
METHOD AND SYSTEM FOR CONTROLLING
THE GAS-LIQUID RATIO IN A PUMP
The invention relates to a method and system for controlling the gas-liquid ratio in a pump for pumping multiphase fluid mixtures.
Boosting the pressure of an unstabilised fluid with a varying liquid and gas content is still a significant problem, in particular during the production of hydrocarbon fluids from an oil and/or gas field. The well effluents of an oil and/or gas production well may contain crude oil, natural gas, condensates, water and some solids like sand and salt. In particular the varying gas-liquid ratio of the effluents, which may suddenly rise from 0% tolO0%,make pumping difficult. In general, usage of an oil and gas separation train to facilitate separate monophase pumping of the gaseous and liquid phases is not feasible because it is very costly, in particular for seabed production systems.
Numerous attempts have been made to accomplish pumping of multiphase fluids. For instance, US patent 3,936,214 discloses a centrifugal pump having a rotatable case which impels fluid to one collection point if it is liquid and to another collection point if it is gas whereby the liquid and gas are discharged via separate outlet parts within the pump housing. Drawbacks of the known multiphase pump design are its complex configuration and operation.
Accordingly it is an object of the present invention to provide a method and a system for controlling the gas-liquid ratio in a multiphase pump which do not require a complex design or a complex control system to prevent the occurrence of gas locks in the pump.
The method according to the invention thereto comprises the following steps: - extracting a selected amount of liquid from a flowline located
downstream of the pump, - detecting the gas content of the fluid mixture at the inlet of
said pump, and
feeding the extracted liquid back to the pump inlet via a
feedback conduit if the detected gas content exceeds a
predetermined value.
The apparatus according to the invention comprises: - a liquid extractor connected to a flowline located downstream
of the pump, - means for detecting the gas content of the fluid mixture at
the inlet of the pump, and - a feedback conduit located between said extractor and pump for
feeding liquid from the extractor back to the pump inlet if
the gas content detected by the detection means exceeds a
predetermined value.
The method according to the invention enables extraction of only a selected amount of liquid from the flowline at a location downstream of the pump whilst the remaining liquid and gas of the multiphase fluid stream flows unhampered away through the flowline.
The step of extracting liquid from a multiphase fluid provides a major difference between the present method and known fluid recirculation systems for preventing vapour locks at the entry of a pump, such as disclosed in US Patent 4,492,516, since in the known systems no extraction of liquid from a multiphase fluid takes place and there is neither recirculation of liquid in response to an unacceptably high gas content of the pumped fluid.
Another advantage of the system according to the invention is that it allows liquids in the conduit downstream of the extractor to flow back into the pump inlet. This feature is particularly attractive when the pump is fed with pure gas after an insufficient differential pressure.
The invention will now be explained in more detail with reference to the accompanying drawings in which: - Fig. 1 shows a preferred embodiment of the apparatus according to the invention, and - Fig. 2 shows the apparatus in a pump station which is powered by well injection gas.
Referring to Fig. 1, there is shown schematically a pump 1 powered by an electrical motor 2. Electrical power is supplied to the motor 2 by an electrical power source (not shown) through an electrical cable 3.
The inlet of the pump 1 is connected to a fluid feed pipe 5 whereas the outlet of the pump is connected to an elongated fluid exhaust flowline 6. A liquid extractor 8 is arranged in the flowline 6 at a location near the pump outlet. The extractor 8 consists of a vessel in which small amounts of liquids are extracted and which is at a location near the bottom thereof connected to a liquid feedback conduit 9. Said feedback conduit 9 is at the other end thereof connected to the fluid feed conduit 5.
A flow regulating device 10 consisting of a choke or valve is arranged in the feedback conduit 9 for controlling the flow of fluid through said conduit 9 in response to detection by detector means 12 of an unacceptably high gas content in the fluid feed pipe 5.
During operation of the system a multiphase fluid mixture is pumped by the pump from the fluid feed pipe 5 into the fluid exhaust flowline 6. Some of the liquids exhausted by the pump 1 are extracted from the multiphase flow in the fluid exhaust flowline 6 in the extractor 8. If the detector means 12 detects an unacceptably high gas content in the fluid feed pipe 5 the flow regulating device 10 is opened and liquid flows from the extractor 10 via the feedback conduit 9 to the fluid feed pipe 5 thereby increasing the liquid content of the multiphase fluid at the inlet of the pump 1.
If there are no liquids in the fluids exhausted by the pump 1 which may occur when the upper part of the well tubing is full of gas,for instance during pump start-up, then the exhaust pressure of the pump may be lower in some cases than the pressure in the exhaust line 6 created by the hydrostatic head of the liquid in the flowline 6.
In that case, the fluids in the line 6 will flow back in the extractor 8. Some liquids will then be extracted and fed back to the pump inlet allowing a better pump differential pressure. Once the differential pressure across the pump is sufficient to reach the -required pressure in the line 6 to transfer fluids, then the back flow will stop and normal operation will take place. In view of the above it will be understood that the liquid feed back system has the advantage of being self-regulating.
It will be understood that if the volume the liquid extractor 8 is large in comparison to the volume of the fluid recirculation circuit formed by the feedback conduit 9, the pump 1 and adjacent sections of the feed pipe 5 and exhaust flowline 6, a continuous recirculation of liquid via the pump 1 and fluid circulation circuit might take place whilst 100% gas is fed to the feed pipe 5 and 100% gas is exhausted from the extractor 8 into the exhaust flowline 6.
Thus with the aid of a liquid feedback system according to the invention it is possible to pump 100% gas through a flowline using a multiphase pump which can only pump a multiphase fluid containing at least some liquid. It will be understood that the liquid extractor 8 may consist of a vessel which may be coupled either directly to the flowline 6 at a location near the upper end thereof and which may possibly include some storage, as shown in the drawing, or be coupled to the flowline via a T-joint.
It will further be understood that the pump 1 may be any tpe of pump such as a rotary pump, a turbine or a positive displacement pump. The motor may be any type of motor, such as an electrical motor, an hydraulic motor or a gas-driven turbine.
As illustrated in Fig. 2 the liquid feedback system according to the invention is particularly attractive for pumping of well effluents from a well in which a gas lifting technique is applied to bring the well effluents from the reservoir 20 to the wellhead 21. The injection gas which is injected via an injection line 22 is used to drive a pump motor 23 consisting of a gas-driven turbine. In the well tubing 24 the gas is mixed up with the well effluents and causes a continuous presence of gas in high quantities in the well effluents passing through the pump 25. To alleviate any problems due to the pumping of a multiphase gas-liquid mixture the pump 25 is equipped with a liquid extractor 26 and liquid feed back loop 27.In use the liquid extractor 26 extracts some liquid from the flowline 28 and if too much gas is detected in the effluents produced from the well a valve 29 is opened in the liquid feed back loop 27 so as to increase the liquid content of the pumped effluents to such a value that an optimum performance of the pump 25 is accomplished. In the embodiment shown the pump 25 and pump motor 23 have a common shaft 30 and they are together with the extractor 26, mounted in a cylindrical housing schematically represented by dash-dot line 31, which is inserted in a cup-shaped base 37 so as to enable easy retrieval thereof for maintenance or repair. The effluents produced via the flowline 28 and riser 32 are separated in a gas-liquid separator tank 33.The separated gas may be split into a gas stream 34 for sale or other purposes and another gas stream 35 which is pumped by a gaslift compressor station 36 into the gas injection line 22. It will be understood that the embodiment shown in Fig. 2 is particularly attractive if a gaslift technique is used in a subsea well at a remote location. In that case the pump motor 23. is driven by the injection gas so that no additional power transfer line is needed to feed the motor. The liquid feed back loop 27 ensures a proper operation of the pump 25 whereas the gas-liquid separator tank 33, and the gas compressor station 36 may be located on an offshore platform or onshore. In this manner a very efficient, cost effective and reliable oil production system is created.
Finally, it will be understood that the liquid feedback system according to the invention is particularly attractive for use in a system for pumping unstabilised well effluents comprising a varying gas content which may occasionally exceed the maximum gas liquid ratio the pump can tolerate.
Claims (12)
1. A method for controlling the gas-liquid ratio in a pump for
pumping multiphase fluid mixtures, the method comprising the
steps of:
- extracting a selected amount of liquid from a flowline
located downstream of the pump,
- detecting the gas content of the fluid mixture at the
inlet of said pump, and
- feeding the extracted liquid back to the pump inlet via a
feedback conduit if the detected gas content exceeds a
predetermined value.
2. The method of claim 1 wherein the pumped fluid mixture
consists of well effluents flowing from an oil production
well.
3. The method of claim 2, wherein the pump is a rotary pump
driven by a motor consisting of a gas turbine which is powered
by a gas injected into a well for gas lifting of well
effluents.
4. A system for controlling the gas-liquid ratio in a pump for
pumping multiphase fluid mixtures, the system comprising:
- a liquid extractor connected to a flowline located
downstream of the pump,
- means for detecting the gas content of the fluid mixture
at the inlet of the pump, and
- a feedback conduit located between said extractor and
pump for feeding liquid from the extractor back to the
pump inlet if the gas content detected by the detection
means exceeds a predetermined value.
5. The system of claim 4 wherein said gas detection means
controls a flow regulating device in the feedback conduit.
6. The system of claim 5 wherein the flow regulating device
consists of a valve.
7. The system of claim 5 wherein the flow regulating device
consists of a choke.
8. The system of claim 4 wherein the liquid extractor consists of
a vessel for storing a selected amount of liquid.
9. The system of claim 8 wherein the feedback conduit is
connected to the vessel at a location near the bottom thereof.
10. The system of claim 8 wherein the flowline is connected to the
vessel at a location near the top thereof.
11. A method for controlling the gas-liquid ratio in a pump for
pumping multiphase fluid mixtures, substantially as described
with reference to the accompanying drawing.
12. A system for controlling the gas-liquid ratio in a pump for
pumping multiphase fluid mixtures, substantially as described
with reference to the accompanying drawing.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8804729A GB2215408B (en) | 1988-02-29 | 1988-02-29 | Method and system for controlling the gas-liquid ratio in a pump |
| NO890828A NO171871C (en) | 1988-02-29 | 1989-02-27 | PROCEDURE AND SYSTEM FOR GAS / FLUID CONTROL IN A PUMP |
| NZ228139A NZ228139A (en) | 1988-02-29 | 1989-02-27 | Controlling gas-liquid ratio in multi-phase fluid pump by recirculation of liquid content |
| AU30768/89A AU609582B2 (en) | 1988-02-29 | 1989-02-27 | Method and system for controlling the gas-liquid ratio in a pump |
| BR898900892A BR8900892A (en) | 1988-02-29 | 1989-02-27 | PROCESS AND SYSTEM FOR CONTROL OF THE PROPORTION OF GAS-LIQUID IN A PUMP |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8804729A GB2215408B (en) | 1988-02-29 | 1988-02-29 | Method and system for controlling the gas-liquid ratio in a pump |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8804729D0 GB8804729D0 (en) | 1988-03-30 |
| GB2215408A true GB2215408A (en) | 1989-09-20 |
| GB2215408B GB2215408B (en) | 1991-12-11 |
Family
ID=10632566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8804729A Expired - Fee Related GB2215408B (en) | 1988-02-29 | 1988-02-29 | Method and system for controlling the gas-liquid ratio in a pump |
Country Status (5)
| Country | Link |
|---|---|
| AU (1) | AU609582B2 (en) |
| BR (1) | BR8900892A (en) |
| GB (1) | GB2215408B (en) |
| NO (1) | NO171871C (en) |
| NZ (1) | NZ228139A (en) |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0437070A1 (en) * | 1990-01-09 | 1991-07-17 | Conoco Inc. | Gas separator for submersible pumps |
| EP0549439A1 (en) * | 1991-12-27 | 1993-06-30 | Institut Français du Pétrole | Method and apparatus for optimising the transport of multiphase flows by pumping |
| FR2694785A1 (en) * | 1992-08-11 | 1994-02-18 | Inst Francais Du Petrole | Prodn optimisation of small underwater oil field - by reinjection of fluid esp gas sepd from product |
| FR2724200A1 (en) * | 1994-09-02 | 1996-03-08 | Technicatome | Deep underwater oil pumping station |
| FR2724424A1 (en) * | 1994-09-14 | 1996-03-15 | Inst Francais Du Petrole | POLYPHASIC PUMP SYSTEM WITH REGULATION BUCKLE |
| FR2730767A1 (en) * | 1995-02-21 | 1996-08-23 | Inst Francais Du Petrole | METHOD AND DEVICE FOR REGULATING A POLYPHASE PUMPING ASSEMBLY |
| WO2003033870A1 (en) * | 2001-10-12 | 2003-04-24 | Alpha Thames Ltd | Multiphase fluid conveyance system |
| WO2004003341A1 (en) * | 2002-06-28 | 2004-01-08 | Alpha Thames Ltd | A method and system for combating the formation of emulsions |
| WO2004005670A1 (en) * | 2002-07-10 | 2004-01-15 | Weatherford/Lamb, Inc. | Closed loop multiphase underbalanced drilling process |
| US6773235B2 (en) | 1999-12-31 | 2004-08-10 | Shell Oil Company | Rotodynamic multi-phase flow booster pump |
| WO2009047521A3 (en) * | 2007-10-10 | 2009-06-25 | Petroleo Brasileiro Sa | Pumping module and system |
| EP2093429A1 (en) * | 2008-02-25 | 2009-08-26 | Siemens Aktiengesellschaft | Compressor unit |
| WO2013110979A3 (en) * | 2012-01-23 | 2014-02-13 | Obs Technology As | Intermediate storage |
| WO2015011369A1 (en) * | 2013-07-24 | 2015-01-29 | Total Sa | Multiphase pumping device |
| EP3037668A1 (en) * | 2014-12-18 | 2016-06-29 | Sulzer Management AG | Operating method for a pump, in particular a multi phase pump as well as a pump |
| US9512700B2 (en) | 2014-11-13 | 2016-12-06 | General Electric Company | Subsea fluid processing system and an associated method thereof |
| NO20150922A1 (en) * | 2015-07-15 | 2017-01-16 | Jb Services As | Apparatus for stimulating a petroleum well and method for stimulating the well |
| NO20150921A1 (en) * | 2015-07-15 | 2017-01-16 | Jb Services As | Apparatus for increasing the flow rate of a multiphase fluid and method for increasing the flow rate |
| WO2018212661A1 (en) | 2017-05-15 | 2018-11-22 | Aker Solutions As | System and method for fluid processing |
| US10463990B2 (en) | 2015-12-14 | 2019-11-05 | General Electric Company | Multiphase pumping system with recuperative cooling |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4492516A (en) * | 1982-09-30 | 1985-01-08 | Tenneco, Inc. | Method and apparatus for controlling recirculation in a centrifugal pump |
-
1988
- 1988-02-29 GB GB8804729A patent/GB2215408B/en not_active Expired - Fee Related
-
1989
- 1989-02-27 BR BR898900892A patent/BR8900892A/en not_active IP Right Cessation
- 1989-02-27 NO NO890828A patent/NO171871C/en not_active IP Right Cessation
- 1989-02-27 AU AU30768/89A patent/AU609582B2/en not_active Expired
- 1989-02-27 NZ NZ228139A patent/NZ228139A/en unknown
Cited By (39)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0437070A1 (en) * | 1990-01-09 | 1991-07-17 | Conoco Inc. | Gas separator for submersible pumps |
| EP0549439A1 (en) * | 1991-12-27 | 1993-06-30 | Institut Français du Pétrole | Method and apparatus for optimising the transport of multiphase flows by pumping |
| FR2685738A1 (en) * | 1991-12-27 | 1993-07-02 | Inst Francais Du Petrole | METHOD AND DEVICE FOR OPTIMIZING PUMP TRANSFER OF POLYPHASIC EFFLUENTS |
| FR2694785A1 (en) * | 1992-08-11 | 1994-02-18 | Inst Francais Du Petrole | Prodn optimisation of small underwater oil field - by reinjection of fluid esp gas sepd from product |
| US5390743A (en) * | 1992-08-11 | 1995-02-21 | Institut Francais Du Petrole | Installation and method for the offshore exploitation of small fields |
| FR2724200A1 (en) * | 1994-09-02 | 1996-03-08 | Technicatome | Deep underwater oil pumping station |
| FR2724424A1 (en) * | 1994-09-14 | 1996-03-15 | Inst Francais Du Petrole | POLYPHASIC PUMP SYSTEM WITH REGULATION BUCKLE |
| EP0702156A1 (en) * | 1994-09-14 | 1996-03-20 | Institut Français du Pétrole | Multiphase pumping system with control loop |
| FR2730767A1 (en) * | 1995-02-21 | 1996-08-23 | Inst Francais Du Petrole | METHOD AND DEVICE FOR REGULATING A POLYPHASE PUMPING ASSEMBLY |
| US5775879A (en) * | 1995-02-21 | 1998-07-07 | Institut Francais Du Petrole | Process and device for regulating a multiphase pumping assembly |
| US6773235B2 (en) | 1999-12-31 | 2004-08-10 | Shell Oil Company | Rotodynamic multi-phase flow booster pump |
| WO2003033870A1 (en) * | 2001-10-12 | 2003-04-24 | Alpha Thames Ltd | Multiphase fluid conveyance system |
| WO2004003341A1 (en) * | 2002-06-28 | 2004-01-08 | Alpha Thames Ltd | A method and system for combating the formation of emulsions |
| WO2004005670A1 (en) * | 2002-07-10 | 2004-01-15 | Weatherford/Lamb, Inc. | Closed loop multiphase underbalanced drilling process |
| US7178592B2 (en) | 2002-07-10 | 2007-02-20 | Weatherford/Lamb, Inc. | Closed loop multiphase underbalanced drilling process |
| WO2009047521A3 (en) * | 2007-10-10 | 2009-06-25 | Petroleo Brasileiro Sa | Pumping module and system |
| US8607877B2 (en) | 2007-10-10 | 2013-12-17 | Petroleo Brasileiro S.A.-Petrobras | Pumping module and system |
| US8511386B2 (en) | 2007-10-10 | 2013-08-20 | Petroleo Brasileiro S.A.—Petrobras | Pumping module and system |
| US20100322785A1 (en) * | 2008-02-25 | 2010-12-23 | Marcel Buse | Compressor Unit |
| US8186968B2 (en) * | 2008-02-25 | 2012-05-29 | Siemens Aktiengesellchaft | Compressor unit including a detection device to identify non-gaseous fluid in the suction line |
| WO2009106465A1 (en) * | 2008-02-25 | 2009-09-03 | Siemens Aktiengesellschaft | Compressor unit |
| CN101960152B (en) * | 2008-02-25 | 2013-11-06 | 西门子公司 | Compressor unit and method for operating compressor unit |
| EP2093429A1 (en) * | 2008-02-25 | 2009-08-26 | Siemens Aktiengesellschaft | Compressor unit |
| WO2013110979A3 (en) * | 2012-01-23 | 2014-02-13 | Obs Technology As | Intermediate storage |
| AU2012367825B2 (en) * | 2012-01-23 | 2016-03-17 | Obs Technology As | Intermediate storage |
| US9657553B2 (en) | 2012-01-23 | 2017-05-23 | Obs Technology As | Intermediate storage |
| WO2015011369A1 (en) * | 2013-07-24 | 2015-01-29 | Total Sa | Multiphase pumping device |
| FR3009036A1 (en) * | 2013-07-24 | 2015-01-30 | Total Sa | POLYPHASE PUMPING DEVICE |
| US10040002B2 (en) | 2013-07-24 | 2018-08-07 | Total Sa | Multiphase pumping device |
| US9512700B2 (en) | 2014-11-13 | 2016-12-06 | General Electric Company | Subsea fluid processing system and an associated method thereof |
| CN105715562A (en) * | 2014-12-18 | 2016-06-29 | 苏尔寿管理有限公司 | Operating method for a pump, in particular for a multiphase pump, and pump |
| EP3037668A1 (en) * | 2014-12-18 | 2016-06-29 | Sulzer Management AG | Operating method for a pump, in particular a multi phase pump as well as a pump |
| US10330122B2 (en) | 2014-12-18 | 2019-06-25 | Sulzer Management Ag | Operating method for a pump, in particular for a multiphase pump, and pump |
| CN105715562B (en) * | 2014-12-18 | 2019-07-26 | 苏尔寿管理有限公司 | For pumping, the especially operating method of multiphase pump, and pump |
| NO20150922A1 (en) * | 2015-07-15 | 2017-01-16 | Jb Services As | Apparatus for stimulating a petroleum well and method for stimulating the well |
| NO20150921A1 (en) * | 2015-07-15 | 2017-01-16 | Jb Services As | Apparatus for increasing the flow rate of a multiphase fluid and method for increasing the flow rate |
| US10463990B2 (en) | 2015-12-14 | 2019-11-05 | General Electric Company | Multiphase pumping system with recuperative cooling |
| WO2018212661A1 (en) | 2017-05-15 | 2018-11-22 | Aker Solutions As | System and method for fluid processing |
| US11071930B2 (en) | 2017-05-15 | 2021-07-27 | Aker Solutions As | System and method for fluid processing |
Also Published As
| Publication number | Publication date |
|---|---|
| NO171871B (en) | 1993-02-01 |
| NO171871C (en) | 1993-05-12 |
| BR8900892A (en) | 1989-10-17 |
| GB8804729D0 (en) | 1988-03-30 |
| NO890828L (en) | 1989-08-30 |
| NO890828D0 (en) | 1989-02-27 |
| GB2215408B (en) | 1991-12-11 |
| NZ228139A (en) | 1990-08-28 |
| AU609582B2 (en) | 1991-05-02 |
| AU3076889A (en) | 1989-08-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20070228 |