EP0246943A1 - Process and installation to cause circulation of fluids by pumping - Google Patents
Process and installation to cause circulation of fluids by pumping Download PDFInfo
- Publication number
- EP0246943A1 EP0246943A1 EP87401004A EP87401004A EP0246943A1 EP 0246943 A1 EP0246943 A1 EP 0246943A1 EP 87401004 A EP87401004 A EP 87401004A EP 87401004 A EP87401004 A EP 87401004A EP 0246943 A1 EP0246943 A1 EP 0246943A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- turbine
- fluid
- inlet
- outlet
- 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
- 238000009434 installation Methods 0.000 title claims abstract description 8
- 239000012530 fluid Substances 0.000 title claims description 30
- 238000000034 method Methods 0.000 title claims description 10
- 238000005086 pumping Methods 0.000 title claims description 7
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 239000000203 mixture Substances 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000010779 crude oil Substances 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/129—Adaptations of down-hole pump systems powered by fluid supplied from outside the borehole
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- 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
- F04D13/04—Units comprising pumps and their driving means the pump being fluid driven
Definitions
- the present invention relates to methods and installations for circulating fluids by pumping. More particularly, the invention relates to methods and installations for pumping fluids of high viscosity, for example heavy crude oils which are viscous and the pumping of which is very difficult with centrifugal hydraulics.
- the process according to the invention consists in sending liquid, of lower viscosity than the fluid and miscible with it, under pressure, to the inlet of the turbine of a turbomachine comprising a pump, having an inlet and an outlet, and a turbine which has an inlet and an outlet separate from those of the pump and which is wedged on the same shaft as the pump, mixing with the fluid part of the expanded liquid which leaves the turbine, and sucking the mixture of the liquid and fluid through the inlet of the pump.
- the liquid thus serves as the supply fluid for the turbine of the tubomachine providing the energy necessary for the operation of the pump.
- the liquid also serves to reduce the viscosity of the fluid and thus make it acceptable so that the mixture of fluid and liquid can be pumped by centrifugal hydraulics.
- the method is particularly useful in the case of a borehole, where the liquid must be sent anyway to the bottom of the borehole where the turbomachine is located, it is immediately accessible there, without the need for a pipe. special to bring him there.
- the volume flow rate of the liquid sent to the inlet of the turbine represents from 0.5 to 3 times the volume flow rate of the fluid to be pumped. It is advantageous that the volume flow rate of the liquid mixed with the fluid to be pumped represents from 0.1 to 0.5 times the volume flow rate of the fluid to be pumped.
- the liquid should have a low viscosity, be miscible with the fluid by reducing the viscosity of the mixture, contain little gas and preferably does not react on the fluid.
- a liquid having a viscosity of 1 to 10 centistokes is used, by having a mixture whose viscosity is less than 30 centistokes.
- the method consists in separating the fluid which leaves the pump, in a first liquid stream and in the second stream, in compressing the first stream, in compressing the part of the expanded liquid which leaves the turbine and which does not is not mixed with the fluid and combine it with the first compressed current to send everything to the turbine inlet.
- the invention also relates to a pumping installation, comprising a liquid source and a turbomachine comprising a pump having an inlet and an outlet, and a turbine which is stalled on the same shaft as the pump and which has an inlet and an outlet, characterized in that the outlet of the turbine opens into a conduit putting the source in communication with the pump and the installation comprises apparatus for separating a fluid into a first stream less viscous and a second stream more viscous, the apparatus being provided with an inlet which communicates with the outlet of the pump, and two outlets one of which for the first stream communicates with the inlet of the turbine and there is provided a conduit communicating the outlet of the turbine and the outlet of the apparatus intended for the first stream, a compression pump being mounted on this conduit.
- Fluid of high viscosity leaves a source 1 through a conduit 2.
- a conduit 2 opens a conduit 3 coming from the outlet 4 of a turbine 5 of a turbomachine
- This machine essentially comprises the turbine having the outlet 4 and a inlet 6 and a pump 7 having an inlet 8 and an outlet 9 and wedged on the same shaft 10 as the turbine 5.
- a detailed description of this turbomachine can be found in French patent 7823250.
- the mixture of viscous fluid and less viscous liquid is sent under a pressure of between 10 and 150 bar, via a conduit 11 at the inlet of the pump 7.
- the latter discharges it through the outlet 9 and through a conduit 12 into a separation apparatus 13 where the mixture, optionally after settling or centrifugation of the solid materials, is separated into a first stream going through the conduit 14, with compression in a pump 16 at a pressure between 20 and 300 bar, at the inlet 6 of the turbine 5 and in a second stream discharged through a pipe 15.
- the additional liquid which leaves the turbine and which is not sent to the inlet of the pump is returned by a pipe 17, passing through a pump 18 which puts it under a pressure of between 20 and 300 bar, to a conduit 19 which joins the conduit leaving the pump 16 and going at the turbine inlet.
Abstract
L'installation comprend une source (1) de liquide et une turbomachine, comprenant une pompe (7) ayant une entrée (8) et une sortie (9) et une turbine (5) qui est calée sur le même arbre que la pompe (7) et qui a une entrée (6) et une sortie (4). La sortie (4) de la turbine (5) débouche dans un conduit mettant la source (1) en communication avec la pompe (7). Industrie pétrolière.The installation comprises a source (1) of liquid and a turbomachine, comprising a pump (7) having an inlet (8) and an outlet (9) and a turbine (5) which is wedged on the same shaft as the pump ( 7) and which has an inlet (6) and an outlet (4). The outlet (4) of the turbine (5) opens into a conduit putting the source (1) in communication with the pump (7). Oil industry.
Description
La présente invention se rapporte aux procédés et aux installations pour faire circuler des fluides par pompage. Plus particulièrement, l'invention vise des procédés et installations pour pomper des fluides de forte viscosité, par exemple des bruts pétroliers lourds qui sont visqueux et dont le pompage est très difficile avec des hydrauliques centrifuges.The present invention relates to methods and installations for circulating fluids by pumping. More particularly, the invention relates to methods and installations for pumping fluids of high viscosity, for example heavy crude oils which are viscous and the pumping of which is very difficult with centrifugal hydraulics.
Le procédé suivant l'invention consiste à envoyer du liquide, de moindre viscosité que le fluide et miscible à celui-ci, sous pression, à l'entrée de la turbine d'une turbomachine comprenant une pompe, ayant une entrée et une sortie, et une turbine que a une entrée et une sortie distinctes de celles de la pompe et qui est calée sur le même arbre que la pompe, à mélanger au fluide une partie du liquide détendu qui sort de la turbine, et à aspirer le mélange du liquide détendu et du fluide par l'entrée de la pompe.The process according to the invention consists in sending liquid, of lower viscosity than the fluid and miscible with it, under pressure, to the inlet of the turbine of a turbomachine comprising a pump, having an inlet and an outlet, and a turbine which has an inlet and an outlet separate from those of the pump and which is wedged on the same shaft as the pump, mixing with the fluid part of the expanded liquid which leaves the turbine, and sucking the mixture of the liquid and fluid through the inlet of the pump.
Le liquide sert ainsi de fluide d'alimentation de la turbine de la tubomachine fournissant l'énergie nécessaire au fonctionnement de la pompe. Le liquide sert aussi à diminuer la viscosité du fluide et à la rendre ainsi acceptable pour que le mélange de fluide et de liquide puisse être pompé par une hydraulique centrifuge. Le procédé est particulièrement utile dans le cas d'un forage,où le liquide devant être envoyé de toute façon au fond du forage où se trouve le turbomachine, il est immédiatement accessible en cet endroit, sans qu'il soit besoin d'une canalisation spéciale pour l'y amener.The liquid thus serves as the supply fluid for the turbine of the tubomachine providing the energy necessary for the operation of the pump. The liquid also serves to reduce the viscosity of the fluid and thus make it acceptable so that the mixture of fluid and liquid can be pumped by centrifugal hydraulics. The method is particularly useful in the case of a borehole, where the liquid must be sent anyway to the bottom of the borehole where the turbomachine is located, it is immediately accessible there, without the need for a pipe. special to bring him there.
De préférence, le débit en volume du liquide envoyé à l'entrée de la turbine représente de 0,5 à 3 fois le débit en volume du fluide à pomper. Il est avantageux que le débit en volume du liquide mélangé au fluide à pomper représente de 0,1 à 0,5 fois le débit en volume du fluide à pomper.Preferably, the volume flow rate of the liquid sent to the inlet of the turbine represents from 0.5 to 3 times the volume flow rate of the fluid to be pumped. It is advantageous that the volume flow rate of the liquid mixed with the fluid to be pumped represents from 0.1 to 0.5 times the volume flow rate of the fluid to be pumped.
Il convient que le liquide ait une faible viscosité, soit miscible avec le fluide en diminuant la viscosité du mélange,contienne peu de gaz et de préférence ne réagisse pas sur le fluide. A titre d'exemple, pour pomper un fluide ayant une viscosité de 100 à 1000 centistokes on utilise un liquide ayant une viscosité de 1 à 10 centistokes, en ayant un mélange dont la viscosité est inférieure à 30 centistokes.The liquid should have a low viscosity, be miscible with the fluid by reducing the viscosity of the mixture, contain little gas and preferably does not react on the fluid. By way of example, to pump a fluid having a viscosity of 100 to 1000 centistokes, a liquid having a viscosity of 1 to 10 centistokes is used, by having a mixture whose viscosity is less than 30 centistokes.
Suivant un perfectionnement avantageux, le procédé consiste à séparer le fluide qui sort de la pompe, en un premier courant liquide et en second courant,à comprimer le premier courant, à comprimer la partie du liquide détendu qui sort de la turbine et qui n'est pas mélangée au fluide et à la réunir au premier courant comprimé pour envoyer le tout à l'entrée de la turbine.According to an advantageous improvement, the method consists in separating the fluid which leaves the pump, in a first liquid stream and in the second stream, in compressing the first stream, in compressing the part of the expanded liquid which leaves the turbine and which does not is not mixed with the fluid and combine it with the first compressed current to send everything to the turbine inlet.
L'invention vise également une installation de pompage, comprenant une source de liquide et une turbomachine comprenant une pompe ayant une entrée et une sortie, et une turbine qui est calée sur le même arbre que la pompe et qui a une entrée et une sortie, caractérisée en ce que la sortie de la turbine débouche dans un conduit mettant la source en communication avec la pompe et l'installation comprend un appareillage de séparation d'un fluide en un premier courant moins visqueux et en un second courant plus visqueux, l'appareillage étant muni d'une entrée qui communique avec la sortie de la pompe, et de deux sorties dont l'une pour le premier courant communique avec l'entrée de la turbine et il est prévu un conduit mettant en communication la sortie de la turbine et la sortie de l'appareillage destinée au premier courant,une pompe de compression étant montée sur ce conduit.The invention also relates to a pumping installation, comprising a liquid source and a turbomachine comprising a pump having an inlet and an outlet, and a turbine which is stalled on the same shaft as the pump and which has an inlet and an outlet, characterized in that the outlet of the turbine opens into a conduit putting the source in communication with the pump and the installation comprises apparatus for separating a fluid into a first stream less viscous and a second stream more viscous, the apparatus being provided with an inlet which communicates with the outlet of the pump, and two outlets one of which for the first stream communicates with the inlet of the turbine and there is provided a conduit communicating the outlet of the turbine and the outlet of the apparatus intended for the first stream, a compression pump being mounted on this conduit.
La figure unique du dessin annexé est une vue schématique en coupe et avec arrachement partiel qui illustre l'invention.The single figure of the accompanying drawing is a schematic sectional view with partial cutaway which illustrates the invention.
Du fluide de forte viscosité sort d'une source 1 par une conduit 2. Dans le conduit 2 débouche un conduit 3 provenant de la sortie 4 d'une turbine 5 d'une turbomachine Cette machine comporte essentiellement la turbine ayant la sortie 4 et une entrée 6 et une pompe 7 ayant une entrée 8 et une sortie 9 et calée sur le même arbre 10 que la turbine 5. On trouvera une description détaillée de cette turbomachine au brevet français 7823250.Fluid of high viscosity leaves a
Le mélange de fluide visqueux et de liquide moins visqueux est envoyé sous une pression comprise entre 10 et 150 bar, par un conduit 11 à l'entrée de la pompe 7. Celle-ci le refoule par la sortie 9 et par un conduit 12 dans un appareillage de séparation 13 où le mélange, éventuellement après décantation ou centrifugation des matières solides, est séparé en un premier courant allant par le conduit 14, avec compression dans une pompe 16 sous une pression comprise entre 20 et 300 bar, à l'entrée 6 de la turbine 5 et en un second courant évacué par un conduit 15.Le complément de liquide qui sort de la turbine et qui n'est pas envoyé à l'entrée de la pompe, est retourné par un conduit 17, en passant par une pompe 18 qui le met sous une pression comprise entre 20 et 300 bar, à un conduit 19 qui rejoint le conduit sortant de la pompe 16 et allant à l'entrée de la turbine.The mixture of viscous fluid and less viscous liquid is sent under a pressure of between 10 and 150 bar, via a
L'exemple suivant illustre l'invention.The following example illustrates the invention.
On envoit dans la turbine 55 m³/h d'un liquide pétrolier léger peu visqueux (5 centistokes), sous une pression de 150 bar. La turbomachine tourne à 7500 t/min. La hauteur manométrique de détente dans la turbine est de 1200 mètres.55 m³ / h is sent in a light viscous petroleum liquid (5 centistokes), at a pressure of 150 bar. The turbomachine rotates at 7,500 rpm. The pressure relief height in the turbine is 1200 meters.
On mélange de 10 à 20 parties en volume du liquide détendu sortant de la turbine à 35 m³/h d'un brut ayant une forte viscosité (700 centistokes). La hauteur manométrique de la pompe est de 600 mètres.10 to 20 parts by volume of the expanded liquid leaving the turbine are mixed at 35 m³ / h of crude oil having a high viscosity (700 centistokes). The head of the pump is 600 meters.
Grâce au mélange et à la diminution de la viscosité, on peut ainsi pomper le brut sans difficulté.Thanks to the mixing and the reduction in viscosity, it is thus possible to pump the crude oil without difficulty.
Claims (5)
- à envoyer du liquide de moindre viscosité que le fluide et miscible à celui-ci, sous pression, à l'entrée de la turbine d'une turbomachine comprenant une pompe, ayant une entrée et une sortie, et une turbine qui a une entrée et une sortie distinctes de celles de la pompe et qui est calée sur le même arbre que la pompe,
- à mélanger au fluide, une partie du liquide détendu qui sort de la turbine, et
- à aspirer le mélange du liquide détendu et du fluide par l'entrée de la pompe.1. Method for pumping high viscosity fluid, characterized in that it consists
- to send liquid of lower viscosity than the fluid and miscible with it, under pressure, at the inlet of the turbine of a turbomachine comprising a pump, having an inlet and an outlet, and a turbine which has an inlet and an outlet separate from those of the pump and which is wedged on the same shaft as the pump,
- mixing with the fluid, part of the expanded liquid which leaves the turbine, and
- sucking the mixture of expanded liquid and fluid through the pump inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT87401004T ATE54718T1 (en) | 1986-05-21 | 1987-04-30 | METHOD AND EQUIPMENT TO ENCOURAGE THE CIRCULATION OF LIQUIDS BY PUMPS. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8607204A FR2599091B1 (en) | 1986-05-21 | 1986-05-21 | METHOD AND INSTALLATION FOR CIRCULATING FLUIDS BY PUMPING |
| FR8607204 | 1986-05-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0246943A1 true EP0246943A1 (en) | 1987-11-25 |
| EP0246943B1 EP0246943B1 (en) | 1990-07-18 |
Family
ID=9335425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87401004A Expired - Lifetime EP0246943B1 (en) | 1986-05-21 | 1987-04-30 | Process and installation to cause circulation of fluids by pumping |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US4721436A (en) |
| EP (1) | EP0246943B1 (en) |
| JP (1) | JPS62279296A (en) |
| AT (1) | ATE54718T1 (en) |
| CA (1) | CA1274418A (en) |
| DE (1) | DE3763746D1 (en) |
| ES (1) | ES2016372B3 (en) |
| FR (1) | FR2599091B1 (en) |
| GR (1) | GR3000651T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994010449A1 (en) * | 1992-11-03 | 1994-05-11 | Ksb Aktiengesellschaft | Sludger |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5417281A (en) * | 1994-02-14 | 1995-05-23 | Steven M. Wood | Reverse Moineau motor and pump assembly for producing fluids from a well |
| US5611397A (en) * | 1994-02-14 | 1997-03-18 | Wood; Steven M. | Reverse Moineau motor and centrifugal pump assembly for producing fluids from a well |
| JPH0674707B2 (en) * | 1988-09-09 | 1994-09-21 | インテベップ，エス．エイ． | Oil removing device and method |
| FR2656035B1 (en) * | 1989-12-15 | 1996-01-12 | Inst Francais Du Petrole | DEVICE FOR PUMPING A LIQUID AND IN PARTICULAR A HIGH VISCOSITY LIQUID. |
| FR2680983B1 (en) * | 1991-09-10 | 1993-10-29 | Institut Francais Petrole | CONTINUOUS MIXER DEVICE, METHOD AND USE IN A PUMP INSTALLATION OF A HIGH VISCOSITY FLUID. |
| DE4243132C1 (en) * | 1992-12-19 | 1994-07-07 | Klein Schanzlin & Becker Ag | Turbo pump for conveying highly viscous substances |
| US5558502A (en) * | 1993-12-24 | 1996-09-24 | Pacific Machinery & Engineering Co., Ltd. | Turbo pump and supply system with the pump |
| GB0128262D0 (en) * | 2001-11-24 | 2002-01-16 | Rotech Holdings Ltd | Artificial lift pump |
| US6854517B2 (en) | 2002-02-20 | 2005-02-15 | Baker Hughes Incorporated | Electric submersible pump with specialized geometry for pumping viscous crude oil |
| ITCO20120015A1 (en) * | 2012-04-12 | 2013-10-13 | Nuovo Pignone Srl | METHOD FOR THE PREVENTION OF CORROSION AND COMPONENT OBTAINED THROUGH THIS METHOD |
| CN104989616A (en) * | 2015-05-28 | 2015-10-21 | 中国石油天然气股份有限公司 | Turbocharger of oil well pump |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR993641A (en) * | 1949-04-28 | 1951-11-05 | Pumping devices for deep wells | |
| FR2285532A1 (en) * | 1974-09-20 | 1976-04-16 | Kobe Inc | Oil well turbine pump - with bottom pump inlet and axial thrust balancing piston between pump and turbine |
| US4035023A (en) * | 1975-07-15 | 1977-07-12 | Freeport Minerals Company | Apparatus and process for hydraulic mining |
| US4086030A (en) * | 1975-02-10 | 1978-04-25 | Emc Energies, Inc. | Free fluid-operated well turbopump |
| US4233154A (en) * | 1978-12-29 | 1980-11-11 | Kobe, Inc. | Method for treating petroleum well pumping power fluid |
| GB2053324A (en) * | 1979-06-21 | 1981-02-04 | Kobe Inc | Well pumping system |
| GB2057058A (en) * | 1979-08-20 | 1981-03-25 | Kobe Inc | Turbine-driven pumps |
| US4285401A (en) * | 1980-06-09 | 1981-08-25 | Kobe, Inc. | Electric and hydraulic powered thermal stimulation and recovery system and method for subterranean wells |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US975526A (en) * | 1910-09-15 | 1910-11-15 | Ernest K Hood | Propeller turbine-pump. |
| US1842960A (en) * | 1925-08-21 | 1932-01-26 | Anna M C Wechsberg | Pumping device |
| US3194026A (en) * | 1963-10-24 | 1965-07-13 | Fleur Corp | Power-refrigeration system |
| US3420434A (en) * | 1966-12-30 | 1969-01-07 | Judson S Swearingen | Rotary compressors and systems employing same using compressor gas as seal gas |
-
1986
- 1986-05-21 FR FR8607204A patent/FR2599091B1/en not_active Expired - Fee Related
-
1987
- 1987-04-30 ES ES87401004T patent/ES2016372B3/en not_active Expired - Lifetime
- 1987-04-30 EP EP87401004A patent/EP0246943B1/en not_active Expired - Lifetime
- 1987-04-30 DE DE8787401004T patent/DE3763746D1/en not_active Expired - Fee Related
- 1987-04-30 AT AT87401004T patent/ATE54718T1/en not_active IP Right Cessation
- 1987-05-07 US US07/047,628 patent/US4721436A/en not_active Expired - Lifetime
- 1987-05-19 CA CA000537419A patent/CA1274418A/en not_active Expired - Fee Related
- 1987-05-21 JP JP62122693A patent/JPS62279296A/en active Pending
-
1990
- 1990-07-19 GR GR89400325T patent/GR3000651T3/en unknown
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR993641A (en) * | 1949-04-28 | 1951-11-05 | Pumping devices for deep wells | |
| FR2285532A1 (en) * | 1974-09-20 | 1976-04-16 | Kobe Inc | Oil well turbine pump - with bottom pump inlet and axial thrust balancing piston between pump and turbine |
| US4086030A (en) * | 1975-02-10 | 1978-04-25 | Emc Energies, Inc. | Free fluid-operated well turbopump |
| US4035023A (en) * | 1975-07-15 | 1977-07-12 | Freeport Minerals Company | Apparatus and process for hydraulic mining |
| US4233154A (en) * | 1978-12-29 | 1980-11-11 | Kobe, Inc. | Method for treating petroleum well pumping power fluid |
| GB2053324A (en) * | 1979-06-21 | 1981-02-04 | Kobe Inc | Well pumping system |
| GB2057058A (en) * | 1979-08-20 | 1981-03-25 | Kobe Inc | Turbine-driven pumps |
| US4285401A (en) * | 1980-06-09 | 1981-08-25 | Kobe, Inc. | Electric and hydraulic powered thermal stimulation and recovery system and method for subterranean wells |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994010449A1 (en) * | 1992-11-03 | 1994-05-11 | Ksb Aktiengesellschaft | Sludger |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0246943B1 (en) | 1990-07-18 |
| DE3763746D1 (en) | 1990-08-23 |
| FR2599091B1 (en) | 1990-10-26 |
| FR2599091A1 (en) | 1987-11-27 |
| US4721436A (en) | 1988-01-26 |
| ATE54718T1 (en) | 1990-08-15 |
| ES2016372B3 (en) | 1990-11-01 |
| JPS62279296A (en) | 1987-12-04 |
| GR3000651T3 (en) | 1991-09-27 |
| CA1274418A (en) | 1990-09-25 |
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