CN1507531A - Method for pumping fluids - Google Patents
Method for pumping fluids Download PDFInfo
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- CN1507531A CN1507531A CNA02809753XA CN02809753A CN1507531A CN 1507531 A CN1507531 A CN 1507531A CN A02809753X A CNA02809753X A CN A02809753XA CN 02809753 A CN02809753 A CN 02809753A CN 1507531 A CN1507531 A CN 1507531A
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- 239000012530 fluid Substances 0.000 title claims abstract description 315
- 238000005086 pumping Methods 0.000 title claims abstract description 194
- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000004519 manufacturing process Methods 0.000 claims abstract description 84
- 238000005553 drilling Methods 0.000 claims description 56
- 239000007788 liquid Substances 0.000 claims description 48
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- 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
- E21B43/128—Adaptation of pump systems with down-hole electric drives
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- Life Sciences & Earth Sciences (AREA)
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- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The production rate, useful life and operating efficiency of electric submergible pumping systems (ESP) is improved by operating the system so that the motor (220, 320) is cooled by two passes of production. Production fluids remove waste heat from the motor (220, 320) by passing the fluid in contact with the exterior of the motor (220, 320). The improved cooling permits the motor to be operated at a lower temperature improving life and efficiency, and/or to be operated at higher power at a similar temperature. Additionally, oversized and excess equipment is not required, further improving performance and economics for the user. In another aspect, the invention is a method of pumping fluids using a motor having vortex generators (366) on its exterior surfaces or on the interior surfaces of a surrounding shroud.
Description
Technical field
The present invention relates to the method for pumping fluid, particularly, relate to the method for pumping fluid from drilling well.
Background technology
Water, oil and gas are produced from drilling well usually.Drilling well is to form by the degree of depth that is drilled into store fluid in the rock stratum.After the boring pit shaft is inserted in the hole.If natural gas is arranged in the well, because the natural buoyancy of natural gas is easy to its recovery, and in most cases water and oil must be pumped into ground.
Adopt various types of pumping systems from drilling well, to produce fluid.These systems comprise sucker rod system, plunger Hoisting System, continuous or intermittent gas lift system, hydraulic reciprocating pump, screw pump and electric submersible pump (ESP).The electricity submersible pump has and is used for driving the diving pump motor, and wherein fluid flows on the ground from storage under the effect of submersible pump.
The electricity submersible pump is usually operated at the very abominable very dark down-hole of ambient conditions, operates at a distance.Making a difficult problem of electricity consumption submersible pump is efficiently radiates heat.Winding resistance produces a large amount of used heat during motor work, and mechanical friction and fluid friction also produce a large amount of used heat.If used heat fully can not be removed, motor temperature can significantly rise.The rising of motor temperature will cause a lot of problems.Motor application life can be because temperature raises and shortening greatly.The insulation of motor winding, supporting, sealing and the lubricated adverse effect that also all can be subjected to high temperature.Therefore, have to often electric submersible pump be taken out from drilling well change or repairing electric motor.Especially in the field, oil market, this will cause very high maintenance cost and cause very large economic loss because of stopping production.Perhaps, keep in the reasonable scope in order to make motor temperature, the output of having to sometimes reduce, or use super large or extra equipment, thus reduced the efficient and the benefit of oil well.When using extra equipment such as gas separator or auxiliary seal, electrical efficiency is reduced because temperature rises and need soup.This will increase energy cost, because finish certain workload more electric power must be arranged.
Sometimes conditions down-hole that this problem also can Yin Teding and operating personnel's selection and become more serious.The high viscosity of the fluid of conditions down-hole such as high gas content, production, the formation of emulsion, low flow velocity, multiphase flow, steam spray volume, deflection and horizontal well, well depth increase etc. and other factors all can make motor temperature raise.Wherein there are some conditions to make operating personnel be difficult to suitably to select and operate down-hole electricity submersible pump.
The fluid of producing can be taken away some used heat usually and the control of temperature to a certain degree is provided.In traditional electric submersible pump unit, the fluid of the production of extraction or pumping is taken away some heats by motor.This effect has shown traditional electric submersible pump and so-called " being inverted electric submersible pump " pumping system respectively shown in Fig. 1 and the 1A among the figure.In Fig. 1, drilling well 1 has sleeve 2, and the fluid of production enters in the drilling well by the hole 7 of sleeve 2.The electricity submerged pump system comprises pump 3, motor 4 and hermetic unit 5.The fluid of producing is being lower than or is entering drilling well near the position of motor 4 bottoms, through motor 4, enters pump 3 at Pump Suction Nozzle 6 along the direction of arrow 8 then.Upwards flow in the fluid of producing leaves pump 3 under the effect of pump 3 top, the direction along arrow 9 flow on the ground then.Cable 10 provides electric power to motor 4 from the face of land.As shown in the figure, packer 16 can be used for this device.
In " being inverted electric submersible pump " system shown in Figure 1A, the relative position of pump and motor turns around.Drilling well 11 has sleeve 12 and hole 17 as before.The fluid of producing enters pump intake 22 along direction shown in the arrow 18.The fluid of producing leaves outlet 21 and upwards flows under the effect of pump 13, then along direction shown in the arrow 19 upwards flow through hermetic unit 15 and motor 14.As previously mentioned, cable 20 provides electric power from ground.Packer 16 is arranged in this device equally.
In the system shown in Fig. 1 and the 1A, when flowing through motor, the fluid of production takes away some heats.Yet, the heat of being taken away often deficiency so that optimize in motor performance and application life.Therefore, operating personnel attempt ining all sorts of ways improving motor performance and application life.A kind of method is to use special high temperature resistant winding in motor, so just withstand high temperatures better.Yet this method can not reduce the heat of bearing, sealing and lubricated aspect, but also can increase the motor cost greatly.In addition, operation at high temperature more gets rusty easily equipment and corrodes, thereby reduces electrical efficiency.Another kind method is to increase a shroud to increase fluid velocity around motor.Do not flow through in the device of motor casing except being arranged on fluid, otherwise shroud can significantly not change flow behavior (laminar flow or turbulent flow), its price is very high, and is difficult to maybe can not be installed in deviated well and the aperture well.
The another kind of method that makes the electricity consumption submersible pump improve output is introduced in the article of this magazine on the 28th February in 2000 " uses motor cooling bypath system to improve the exploitation time limit of gas well " in electric submersible pump at the 742nd page article in " J.of Petrol.Thechn. " July in 1997 " the electric submersible pump of operating below the hole " and Sison publication in publication.In these methods, electric submerged pump system be installed in drilling well the hole below.The fluid of producing enters drilling well and does not contact with the motor fluid with Pump Suction Nozzle.Owing to there is not convection current cooling, must from pump, extract and be circulated down into the part of the fluid produced the release of out motor bottom, to take away heat.This requires to use another circulation pump and special recirculation conduit usually, and is therefore very complicated, expensive, and efficient is lower.Also be difficult to make abundant fluid to carry out recycling effectively in addition so that enough thermolysiss to be provided.Another kind method is so-called Framco electricity submerged pump system, and it also relates to makes cooling fluid cycle through motor from well head.Done introduction in " Framco electricity submerged pump system: the new method of down-hole electricity diving pumping " literary composition that this is proposed by Jon A.Svaeren and Frank Mohn in the electricity submersible pump seminar of Houston, nineteen ninety Texas on the 2nd in April 30 to May.Equally, the complexity and the expenses of this system can not meet the requirements.
In the U.S. Patent No. 5,951,262 and 6,000,915 of authorizing Hartman, introduced another kind of method.Hartmann's patent has been introduced the pump motor that has hollow rotor shafts, can drive independent pumping unit.Pumping unit and hollow rotor shafts fluid communication make the hollow rotor shafts pumping of the fluid of production by motor, thereby motor interior are played cooling effect and motor can be worked more effectively.
Therefore, press for a kind of improved electric submerged pump system, especially can be defined as away the heat of motor more, and can not increase the electric submerged pump system of the expense or the unnecessary performance of additional element.
Another problem that many drilling wells relate to is the separation of liquids and gases.This problem usually occurs in the drilling well of producing natural gas and oil.If before liquid enters Pump Suction Nozzle, can successfully gas and liquid be separated, just can avoid the inefficiency problem that causes because of pump gas/liquid mixture.Therefore, requiring provides a kind of like this method, make gas-liquid attitude fluid can be before fluid liquid enters pumping system smoothly with separate economically.
Summary of the invention
According to a first aspect of the invention, the diving pumping systems pumps that provides a kind of usefulness to comprise pump and motor is sent the method for fluid, wherein, described motor has hollow rotor shafts, but the described fluid of described pumping system pumping at least a portion is by described hollow rotor shafts, and have at least a part of described fluid to pass through the motor outside, take away heat from motor with the fluid way of contact.
According to a second aspect of the invention, the diving pumping systems pumps that provides a kind of usefulness to comprise pump and motor is sent the method for fluid, wherein:
(a) described motor has hollow rotor shafts, and described pumping system can by described hollow rotor shafts pumping fluid and
(b) in the latent fluid down of pumping system, the feasible fluid that enters the production of pumping system was taken away heat with the fluid way of contact by the motor outside before entering fluid intake, the fluid of following described production passes the hollow rotor shafts pumping of motor, takes away more heat from motor.
According to a third aspect of the invention we, provide a kind of method of drilling well pumping fluid from the band sleeve, the fluid of production enters drilling well by the hole of sleeve, and this method may further comprise the steps:
(a) the electricity diving pumping system that will comprise motor is placed in the sleeve, make motor be positioned at least some places, holes or below and
(b) the pumping system fluid that pumping is produced from drilling well, wherein,
(i) pumping system comprises pump, has the motor of hollow rotor shafts and is positioned at the following fluid intake of motor, the fluid of the hollow rotor shafts pumping production that described pumping system can be by described motor,
(ii) at least some holes by pit shaft enter drilling well fluid liquid before entering fluid intake with the fluid way of contact by the outside of motor take away heat and
(iii) the fluid liquid of the Sheng Chaning axial well head of sleeve rotor that passes motor moves, thereby takes away more motor heat.
According to a forth aspect of the invention, the diving pumping systems pumps that provides a kind of usefulness to comprise pump and motor is sent the method for fluid, wherein,
(a) motor has hollow rotor shafts, and pumping system has below motor and the fluid intake that communicates with described hollow rotor shafts liquid;
(b) pumping system has and is positioned at described motor place or at least one following outlet, and described outlet communicates with fluid intake liquid;
(c) pumping system is dived and is with down in the drilling well of pit shaft;
(d) cross section of motor can make motor can be installed in the pit shaft and between pit shaft and motor external surface and form the space; With
Described pumping system is when work, the a part of fluid that enters fluid intake is by the hollow rotor shafts pumping, and another part fluid that enters fluid intake pumps via described outlet, and upwards with the outside of the fluid way of contact by the motor in the space between pit shaft and motor external surface.
According to a fifth aspect of the invention, provide the method for diving pumping system that a kind of usefulness comprises pump and the motor drilling well pumping fluid from having well head and pit shaft, this method may further comprise the steps:
(I) pumping system is placed in the drilling well, makes pump between motor and well head; Wherein,
(a) motor has the hollow rotor shafts that communicates with pump liquid;
(b) cross section of motor can make motor be installed in the pit shaft, and forms the space between pit shaft and motor;
(c) pumping system has the first fluid intake that communicates with described hollow rotor shafts liquid;
(d) pumping system has second fluid intake more than motor, the space liquid that forms between this second fluid intake and pit shaft and the motor communicates, have at least an outlet to be positioned at motor place or following, described outlet communicates with fluid intake liquid; With
(II) described pumping system is being worked like this under the condition, the first of fluid enters described first fluid intake and passes through the hollow rotor shafts pumping of motor, and the space pumping of the second portion of fluid by forming between pit shaft and the motor, and outside and enter second fluid intake with the mode of the fluid contact motor of flowing through, described first and second parts with fluid are pumped into well head then.
The method of these aspects of the present invention has some significant advantages.Production fluid with laminar flow or Turbulence Flow can provide radiating effect with the fluid way of contact by the motor outside.In gas-producing well, owing to work below the hole flow rate that increases of electric submersible pump can form turbulent flow and significantly improves heat conduction efficiency in the annular space between motor casing and the pit shaft.When passing hollow rotor shafts, the fluid of producing to provide extra cooling effect.Therefore, the fluid of Sheng Chaning is used for heat radiation for twice in the present invention, once is that another time is when passing hollow rotor shafts by the motor when outside.This comprehensive cooling effect help to make motor to remain on best or desired temperature range in.This can prolong the application life of motor and reduce maintenance cost and other expense that breaks down too early and cause because of motor.Make operating personnel under the situation of the temperature that do not raise, to improve output by the power that increases existing equipment.If pump and/or hollow rotor shafts are designed to form turbulent flow when the fluid of producing passes hollow rotor shafts, can further improve cooling effect.FIH provides as prolonging motor application life, improve power density and/or increasing advantage the electrical efficiency by the motor outside and the comprehensive cooling effect that passes the motor hollow rotor shafts.And provide the advantage of combination usually.
Surprisingly, though the fluid of producing is forced through the zone that diameter reduces when passing the hollow rotor shafts of motor, still can realize these advantages.Because so do more energy must be arranged, in general can improve cost of production and temperature is additionally risen.Unexpectedly, have been found that by taking away more heat and can significantly eliminate this shortcoming that taking away more heat is to realize with the hollow rotor shafts of passing motor by motor is outside with the fluid way of contact by the fluid that makes production.
According to a sixth aspect of the invention, the diving pumping systems pumps that provides a kind of usefulness to comprise pump and motor is sent the method for fluid, wherein, in the latent described fluid down of pumping system, make the production fluid that enters pumping system before entering fluid intake, take away heat by the motor outside with the fluid way of contact, motor outside or around the inside of shroud have vortex generator, can make the vortex that produces downbeam with the fluid way of contact by the production fluid of motor outside.This respect of the present invention provides the very economical method that can greatly improve the motor radiating efficiency.Of the present invention this can be incorporated into first and second aspects of the present invention on the one hand.
According to a seventh aspect of the invention, provide a kind of motive mechanism that provides, this mechanism comprises:
(I) power unit comprises:
(a) have the housing of outer wall;
(b) have the hollow rotor shafts at longitudinal axis and two ends, this hollow rotor shafts is installed in rotation in the described housing and can rotates with respect to housing around its longitudinal axis; With
(c) be installed in the drive system of described housing, this drive system links to each other with hollow rotor shafts hollow rotor shafts is rotated with respect to housing, wherein, this drive system comprises that several are installed in housing and are positioned at the axial magnet of sleeve rotor, and these magnet produce the magnetic force that hollow rotor shafts is rotated with respect to housing; With
(II) be positioned at the following pumping unit of power unit, wherein,
(i) this pumping unit comprises and vertical hollow drive shaft of the hollow rotor shafts fluid communication of power unit, and when hollow rotor shafts was rotated, hollow drive shaft rotated around its longitudinal axis;
(ii) hollow drive shaft has the axle inlet near its bottom, makes fluid can pump in the hollow drive shaft;
(iii) the external surface of hollow drive shaft is equipped with at least one impeller, makes when hollow drive shaft rotates, and is installed in the downward pumping fluid of impeller on the hollow drive shaft to the inlet of hollow drive shaft; With
(iv) pumping unit has the fluid intake near its top, and fluid enters in the pumping unit by fluid intake; Fluid intake, hollow drive shaft, rotating shaft inlet and impeller are arranged to, when hollow drive shaft when its longitudinal axis rotates, fluid enters pumping unit by described fluid intake, in pumping unit, be moved down into the axle inlet of hollow drive shaft, the hollow rotor shafts of passing the hollow drive shaft and the power unit of pumping unit then.
According to an eighth aspect of the invention, provide a kind of method of taking out gas-liquid attitude fluid mixture from well, described gas-liquid attitude fluid mixture enters drilling well at least one position, and this method may further comprise the steps:
(I) pumping system is placed in the well, makes pumping system be positioned at the top that gas-liquid attitude fluid mixture enters the drilling well position, wherein,
(a) this pumping system comprises at least one power unit, at least one pumping unit and at least one intake, and fluid pumps in the pumping system by described intake;
(b) power unit comprises the motor that has hollow rotor shafts, hollow rotor shafts and described intake fluid communication, and pumping system can will enter the hollow rotor shafts pumping of the fluid of intake by power unit;
(c) diameter of power unit and pumping unit is less than the diameter of drilling well;
(d) intake is positioned at below at least a portion of pumping system, and the diameter of intake is at least less than the diameter of the pumping system part above it;
(e) intake be arranged to by the fluid liquid of pumping system pumping can flow through downwards intake a part and enter pumping system; With
(II) operation pumping system, (i) gaseous fluid is separated in the position near intake with fluid liquid, this position be in a pumping system part above the intake below, (ii) gaseous fluid is walked around the surface that pumping system rises to drilling well, (iii) fluid liquid upwards is pumped to intake, then flow through the downwards part of intake is left drilling well by the hollow rotor shafts of motor then.
Description of drawings
Fig. 1 is the schematic diagram of two kinds of traditional electrical submerged pump systems;
Fig. 2 and 2A are the sectional views of the embodiment of the invention;
Fig. 3 and 3A show schematic diagram and the detail drawing that the present invention preferably has the motor embodiment of vortex generator;
Fig. 4 to 6 is the sectional views of the embodiment of each side according to the present invention.
The specific embodiment
In the present invention, use the diving pumping system to come pumping fluid.This system comprises pump and motor.Motor has hollow rotor shafts, and described pumping system is by the described fluid of described hollow rotor shafts pumping.The fluid of producing also can provide external refrigeration.In certain embodiments, in the latent fluid down of pumping system, the feasible fluid that enters the production of pumping system was taken away heat with the fluid way of contact by the motor outside before entering the fluid intake of production, the fluid of following described production passes the hollow rotor shafts pumping of motor, takes away more heat from motor.The flow regime of fluid produces turbulent flow when preferably making fluid by the motor outside and has the vortex of downbeam, and forms turbulent flow when passing hollow rotor shafts.In other embodiments, the fluid of production is separated when pumping, and some are by the hollow rotor shafts pumping, and remainder is by the external surface pumping of motor.
Usually, pumping system is installed in the well, perhaps also has to be used for guiding fluid with the mechanical device of the fluid way of contact by the motor outside.The example of this mechanical device is the local shroud that covers pumping system, and shroud has the opening that communicates with pumping fluid at the other end of pumping system, and the fluid intake of production is positioned at the other end.This shroud makes fluid can enter the fluid intake of production with the fluid way of contact by the outside of motor.Space between shroud and the motor outside preferably makes fluid can produce turbulent flow by motor when outside with the fluid way of contact, and can not damage the device in the drilling well or cause serious loss in head.Available vortex generator substitutes shroud or vortex generator is set in addition, and when the fluid of producing was flowed through space between shroud and the motor outside, vortex generator made the fluid of production produce the eddy current of downbeam.
In a preferred embodiment of the invention, pumping system is installed in the well.Drilling well can be vertical, level or so-called " turning to " type.Drilling well has sleeve, and the fluid of production enters drilling well by the hole of sleeve.Pumping system comprises the motor that has hollow rotor shafts.Pumping system has the fluid intake of production, and the fluid of production enters pumping system by the fluid intake of producing.The fluid intake of these productions is positioned at following (for horizontal well, relative with well head) of described motor.Pumping system can come the fluid of the described production of pumping to arrive well head by the hollow rotor shafts of motor.
" fluid of production " is meant any fluid of extracting out from drilling well.The example of this fluid comprises water, oil, natural gas and similar substance, wherein liquid especially oil have special importance.
" hole " only is meant the hole of pit shaft, and the fluid of production enters in the drilling well by the hole.The concrete structure in these holes or formation method are not very important for the present invention.Pumping system be positioned at sleeve at least some holes below.Therefore, under the effect of gravity and/or pumping system, the production fluid that enters above those holes of pumping system enters fluid intake with the fluid way of contact by the motor outside.Usually, pumping system should be below enough porous, make have enough production fluids by the motor outside so that cooling effect to be provided.The best production fluid of half outside by motor before entering fluid intake at least.Preferablely be, pumping system be positioned at nearly all hole below, thereby the fluid of nearly all production is with the outside of the fluid way of contact by motor.Can reach needed maximum cooling effect like this.The following gas-liquid attitude fluid that also helps that makes pumping system be positioned at nearly all hole separated before fluid liquid enters pumping system.When producing gas and liquid mixture in the well, this will boost productivity.Make gas walk around pump and can avoid various relevant problems, such as because of gas-entrained gas lock that causes or low pumping efficiency problem.Because gas has the heat capacity lower than liquid, institute can further improve conduction of heat and motor cooling effect so that gas is walked around motor by this way.In addition, because this pumping unit does not need normally used hole above large equipment or the gas separator of being installed in the legacy system, so the consumption that can significantly not increase electric power.
This pumping system comprises motor and by electric motor driven submersible pump.Motor and pump can have overall structure (being a shared shell), but separate unit preferably usually, and these separate units couple together in being installed in drilling well the time directly or indirectly.
Two embodiment of the inventive method have been shown among Fig. 2.In Fig. 2, pit shaft 210 extends along the periphery of well 201, and the hole had been bored productivity subterranean strata 440 and pierced unproductive subterranean strata 441.Producing zone 440 contains the production fluid that will be pumped into the drilling well top.Sleeve 210 has hole 211, and the fluid of production enters drilling well and is pumped into ground by hole 211.
What be arranged in sleeve 210 is the pumping system that comprises motor 220 and pump 230.Motor 220 and pump 230 all are positioned at below the hole 211.Be fixed on the production pipeline 250 with the motor shown in the section 220.If necessary, produce the form that pipeline 250 can be taked coil pipe.Motor 220 shown in section demonstrates hollow rotor shafts 221, and hollow rotor shafts 221 is rotated and provided power to pump 230 when motor 220 work.The fluid of producing flows to well head by hollow rotor shafts and production pipeline 250.Certain mechanical means of hollow rotor shafts 221 usefulness is connected on the pump 230 directly or indirectly, and when hollow rotor shafts 221 was rotated, pump 230 was in running order.As shown in the figure, the driving shaft of pump 230 directly links to each other with hollow rotor shafts 221, does not have middle device.Yet, may need to comprise various types of middle devices, such as the hermetic unit between motor 220 and pump 230.It is not critical that motor 220 is fixed on production pipeline 250 and the pump 230 by which kind of mode; Can use various securing members, interlock and similar means.Electric power offers motor by cable or kindred organization's (not shown) from well head.
Because motor 220 is below hole 211, so contact with its fluid when entering the fluid of the production of drilling well 201 and before entering intake 260, flowing through motor 220 surfaces.This can be by the combination of the pump action of single action of gravity, pump 230 or these effects and causes.Arrow 290 has been pointed out the flow direction of the fluid of production.Because the fluid of producing must flow through between pit shaft 210 and motor 220 when intake moves, thus the diameter of motor slightly less than the diameter of pit shaft 210, thereby form the annulus that the fluid that can make production passes through.When the fluid of producing with the fluid way of contact by outside the motor 220 during matrix section, can eliminate used heat and play cooling effect.
Because the fluid of producing and be pumped out via the hollow rotor shafts 221 of motor 220 provides extra cooling effect so can eliminate more used heat.Embodiment among Fig. 2 is so-called " inversion " pumping system, and wherein motor is above pump.Though motor be preferably in pump above, this is not critical for the present invention, motor has been shown in the pump the following examples among Fig. 2 A.In Fig. 2 A, drilling well 201A has sleeve 210A.Pumping system comprises produces pipeline 250A, pump 230A, motor 220A and intake 260A.Motor 220A comprises the hollow rotor shafts 221A that the fluid of production passes through.As previously mentioned, hollow rotor shafts 221A is connected on the pump 230A with mechanical means, therefore when motor 220A work, hollow rotor shafts 221A can make pump 230A work and the fluid of producing pumped among the production pipeline 250A by hollow rotor shafts 221A also upwards arrive well head.In the embodiment shown in Fig. 2 A, the fluid of production enters drilling well by hole 211A, flows through the external surface of motor 220A, enters intake 260A, upwards flows and enters in the pump 230A by hollow rotor shafts 221A, arrives well head by producing pipeline 250A then.The fluid that motor 220A is produced has cooled off twice; Once when the fluid of producing passes through the external surface of motor 220A with the fluid way of contact, when one more passes the hollow rotor shafts 221A of motor 220A at the fluid of producing.
In Fig. 4, comprise that the pumping system of motor 402 and pump 411 is arranged in the well that has sleeve 401 and hole 415.Fluid intake 420 be positioned at motor 402 and packer 414 below.In the embodiment shown, fluid intake 420 directly leads to the pump 411 that is positioned at below the motor 402.But, in this diving pumping system, can adopt a plurality of pumps and a plurality of motor, if intake be positioned at least one motor that has hollow rotor shafts below.
Shown in the preferred embodiment, when motor 402 work, the hollow rotor shafts 403 of motor 402 is rotated around its longitudinal axis.This can realize easily by magnet 404 being fixed on the hollow rotor shafts 403 and stator 405 being installed on the shell 410 of motor 402.Hollow rotor shafts 403 is connected on the driving shaft 412 of pump 411 directly or indirectly, and therefore when hollow rotor shafts 403 was rotated, driving shaft 412 rotated, thereby sends mechanical energy to pump 411.Impeller 413 is fixed on the driving shaft 412, therefore can provide power to impeller 413 when driving shaft 412 rotates.
Embodiment shown in Fig. 4 comprises as the thrust bearing of optional feature and sealing ring 416 and packer 414.Thrust bearing and sealing ring 416 couple together motor 402 and pump 411, and form the sealing that can prevent the fluid leaks produced.Packer 414 helps to support the weight of pumping system and can prevent that the band hydraulic fluid of pump the inside from flowing down to Pump Suction Nozzle.These parts are being known in the art.
The inner cooling of the fluid that embodiment shown in Fig. 4 makes motor to be produced (promptly, when fluid passes hollow rotor shafts) and external refrigeration (, when fluid passes through between motor external surface and pit shaft), and needn't use shroud, make fluid carry out recycling or pumping system is arranged on the down-hole the hole below.This avoided well must being got into the hole below, this embodiment promptly of the present invention does not need " deep hole (rathole) " and realizes advantage of the present invention.This embodiment can also avoid pumping system is exposed to below the hole in ever-present many sand structure.
In Fig. 5, pumping system comprises motor 502 and pump 511, is arranged in the well that has sleeve 501 and hole 515.As shown in the figure, hole 515 preferably is positioned at the top of Pump Suction Nozzle 517, but the hole also can with Pump Suction Nozzle 517 with high or be positioned at Pump Suction Nozzle 517 below.Motor 502 has hollow rotor shafts 503.Shown in the preferred embodiment, motor 502 comprises a drive system, this drive system constitutes by being positioned at magnet 504 around the hollow rotor shafts 503 and the stator 505 that is positioned on shell 510 inner faces.When work, hollow rotor shafts 503 is rotated around its longitudinal axis.
During work, the fluid of production enters in the well by hole 515, and the external surface that is downward through motor casing 510 then enters in the intake 517.Then fluid is flowing downward in pump 511 under the effect of impeller 513, and enter rotating shaft inlet 522 and also upwards flow by the hollow drive shaft 512 of pump 511, the hollow rotor shafts 503 of passing motor 502, whole process is along the direction of arrow 506 expressions.
Embodiment shown in Fig. 5 comprises thrust bearing and the sealing ring 516 that can preferentially select for use.In the present invention, fluid flowed downward by pump 511 before entering axle inlet 522 and can reduce the downward pressure that pump 511 produces.This can alleviate the thrust of pump of being born by thrust bearing and sealing ring 516 conversely, thereby prolongs its application life and the needs of minimizing to keeping in repair.And this respect of the present invention makes the outside of motor and the cooling of fluid that the inside can both be produced.
In Fig. 6, comprise that the pumping system of pump 611 and motor 602 is arranged in the well that has sleeve 601 and hole 615, the fluid of production enters drilling well by hole 615.Hole 615 be positioned at pumping system below.The fluid of producing is the mixture of at least a liquid and at least a gas.In the present embodiment, intake 620 be positioned at the pumping system remainder below, but one or more pump or motor also can be positioned at intake below.The diameter D of intake 620 is less than near the diameter D ' of the motor above it 602 (and as shown in the figure, also less than the diameter of pump 611).
During work, the mixture of gas-liquid attitude fluid enters in the well by hole 615.These fluids are moved upwards up in the vortex of numeral 622 expressions among Fig. 6 along arrow 606 directions.The generation of vortex 622 part since the diameter of intake 620 less than the diameter of motor 602.In vortex 622, liquids and gases separate effectively.Gas moves up between the shell 609 of the shell 610 of sleeve 602 and motor 602 and pump 611 along arrow 608 directions.Liquid enters intake 620, and the part of the intake 620 of flowing through downwards then enters hollow rotor shafts 603, upwards is pumped into well head then.Arrow 607 among Fig. 6 has been pointed out the flow direction of liquid.
Of the present invention this is easy to combine as the 5th aspect with others of the present invention on the one hand, to obtain the advantage of both combinations.
In any one embodiment of the present invention, pumping system can comprise in any concrete application the essential or annex that requires.Such as, for the deep hole well, usually in pumping system, be provided with annular seal space.As Brookbank in April, 2000 26-28 day Houston electricity submersible pump Conference Papers " be inverted the pumping system design and use " introduce, this hermetic unit can also bearing pump thrust and is realized additional function.As described in Brookbank, if necessary, the function that the annular seal space part can be realized is assigned on several devices.In the present invention, annular seal space part or be used for other of bearing pump thrust and install the preferably part of pumping system.In so-called " inversion " embodiment, be used for some devices of bearing pump thrust to preferably include in pump or motor, or as a self-contained unit be positioned at the top of pump or below.If necessary, hermetic unit can be positioned at pumping system above, perhaps between motor and pump.Any device between motor and pump must be able to make power be delivered on the pump from motor by this device, and the therefore fluid of the producing hollow rotor shafts that can pass motor is as top the introduction.
Similarly, can be combined in the pumping system or as sand apron (sand skirts), packer, various types of connector and similar device and use with pumping system.Pumping system can have the anti-cavitation device, as the priming pump, produces air pocket to prevent the fluid in hollow rotor shafts or the pump.These devices are particularly useful for the frame mode of pump above motor.
When exploitation deep hole well, the pumping system that common way is to use short individual components to constitute.This method also can be used for the present invention.Motor, pump, intake, hermetic unit and other device can form two or more independent sectors, and these parts are joined together to form whole pumping system.
The design of various motor all can be used in the pumping system of the present invention, as long as this motor has hollow rotor shafts, the fluid of production flows through hollow rotor shafts so that cooling effect to be provided; And/or vortex generator, it is arranged on the annular space between motor and pit shaft or the shroud.Induction conductivity and brushless direct current motor are wherein optimal.In the U.S. Patent No. 5,951,262 and 6,000,915 of Hartman, introduced the type of these suitable motor, in its content of this incorporated by reference.Except following condition, do not need motor is carried out particular design: (1) motor is a submerged type; (2) have above-mentioned hollow rotor shafts; (3) size and dimension of motor is fit to be assemblied in the pit shaft and makes the fluid of production can be with the external surface of the fluid way of contact by motor.Conventional motors also can be used as the motor that is generally used for the pumped downhole system, can make pumping produce the hollow rotor shafts that fluid passes through as long as be provided with.Under the simplest situation, motor can be any submersible electric motor that has vertical armature spindle, and wherein armature spindle has vertical hole.The conventional motors that has vertical armature spindle need only be transformed into hollow rotor shafts by boring in armature spindle in some cases and just can be used for the present invention.
Motor can be single-piece or cascaded structure.Can use a plurality of motor, if necessary, pump can be arranged in the top of motor and below.Hermetic unit and other parts can be installed between motor and the pump.
Because motor will slip in the fluid of production, so should make it be suitable for being operated under this condition.Preferably containing in the motor to provide the motor of lubrication fluid, but motor fluid more important role is to stop the fluid of producing to enter motor.The motor fluid can also contain various drilling wells handles material as anti-agent, emulsifier, non-emulsifier, surfactant, water and the similar material embroidered.Various types of seals can be set in the motor to stop the fluid of producing to infiltrate motor, and as mentioned above, annular seal space partly can be used to adjust the thermal expansion of motor fluid and help motor interior and the outside between pressure balance.
In a kind of preferred motor, the hollow rotor shafts of the relative motor of motor fluid is in barotropic state and has the seepage seal, so the motor fluid leaks into the fluid of production lentamente from motor.Reservoir that can be from pumping system or carry new motor fluid from well head by pipe or capillary system.By the motor fluid is remained under the barotropic state, can reduce or avoid the motor fluid to be produced fluid displacement, thereby can prolong the application life of motor.Pressure-independent flow regulating and controlling valve such as SkoFlo
TMOr SubSea
TMValve is fit to be used for keeping suitable malleation and making new lubricating fluid inflow motor.
A kind of external surface of more preferred motor has vortex generator, or fences up with shroud, and vortex generator is set on inner surface.When the fluid of producing passed through the motor external surface, vortex generator made the fluid of production produce the eddy current of downbeam.Vortex generator is fastening devices preferably, and its shape and size can make the fluid of production produce vortex when flowing through vortex generator.The eddy current of downbeam can improve the conduction of heat from the motor external surface to the production fluid greatly, thereby has further improved superiority of the present invention.
An example of the motor that vortex generator is housed has been shown among Fig. 3.Well 300 has sleeve 310 and hole 311.The internal diameter of well 300 is D.Each diameter all is that motor 320 and the pump 330 of d is arranged in the well.Motor 320 is fixed on the production pipeline 350 that extends to well head.Hollow rotor shafts 321 usefulness are connected motor 320 and pump 330 with Fig. 2 same way as.Pump 330 has intake 360, and the fluid of production enters pumping system by intake 360.In the embodiment shown, 311 places enter drilling well to the fluid of production in the hole, flow through the external surface of motor 320, enter in the intake 360, pass pump 330, pass the hollow rotor shafts 321 of motor 320, upwards arrive well head then, shown in arrow 390 by producing pipeline 350.
In the embodiment shown in fig. 3, the external surface of motor 320 has vortex generator.Another selectable mode is that motor 320 is arranged in the shroud that has vortex generator on the inner surface.In the embodiment of Fig. 3 and 3A, vortex generator is adopted the form with several fins 366.Fin 366 is with respect to the flow direction slightly deflect of the fluid of producing, and adjacent fins 366 deflection round about.Therefore, each constitutes the passage that streamwise narrows down to fin 366.The size of fin 366 and angle of deviation are enough to when the fluid of producing flows through fin, make the eddy current that produces downbeam in the fluid of production.
Suitable angle of deviation is usually located in the scope that departs from production fluid flow direction ± 10-30 degree, and is preferably in the scope of 10-20 degree.The appropriate size of fin 366 is shown in Fig. 3 A.In Fig. 3 A, the gap between motor 320 and the pit shaft 310 determined by (D-d)/2, and wherein D and d are as top introduction.Suitable fin 366 is about 1/3-3/4 of gap width between motor and the pit shaft from the stretch out distance of (or from extending internally around the shroud of motor) of motor 320 external surfaces, perhaps, when using shroud, extended distance is about 1/3-3/4 of gap width between motor and the shroud inner surface.The size 1/2 that in Fig. 3 A, has shown the gap width that is more preferably.In Fig. 3 A, numeral 325 is represented the external surface of motor or is centered on the shroud inner surface of motor.As shown in Figure 3A, fin 366 is preferably with the oblique angle that the width streamwise increases, and the oblique angle width reaches maximum at downward 1/3-3/4 finned length place.But, if necessary, fin leading edge 399 can be taked other shape, is included among Fig. 3 A with those shapes shown in the outline line.The total length of fin is about 1 to 4 times of described gap width as far as possible, is preferably about 1.5 to 3 times.In Fig. 3 A, finned length equates with gap width.
In the embodiment shown in fig. 3, use two row's fins 366.Also can use a row or multi-row fin.When the many rows of use fin, the distance between each row is preferably about 10-30 times of fin clearance distance.But, can adjust this distance with coordination pressure loss and conduction of heat.
Also can use other suitable vortex generator structure, as Paulie and Eaton report in August, 1988
#Those vortex generators that MD51 is introduced in " embedding the hydrodynamics and the heat transfer effect of the following current vortex of turbulent boundary layer ".
Pump itself there is not special designing requirement, except requiring to come the fluid of pumping production by the hollow rotor shafts of motor.Usually, select the pump design characteristic to meet concrete application.Pump communicates with the hollow rotor shafts liquid of motor, this can realize by pump and motor are made a unit or pump is attached to motor, as U.S. Patent No. 5,951, introduced in 262 and 6,000,915, pump is designed to closely cooperate with the hollow rotor shafts of motor, or pump is attached in the motor with other.By the design to connecting between pump discharge (or inlet) and the motor, the various pumps that are used for electric submersible pump traditionally also are to be suitable for fully, and can be used for the present invention at an easy rate.Can preferentially select screw pump for use.Pump can be single-piece or be connected in series.Can use a plurality of pumps.If necessary, pump independently can be located at the top of motor and below.
Method of the present invention can be used for various wells, comprises well, oil well and the natural gas well.This pumping method is especially favourable for the well that uses the traditional electrical submersible pump, and in these drilling wells, the fluid of any production of annular space between motor casing and the pit shaft of flowing through all is a laminar flow.The conditions down-hole of such well can comprise the high viscosity production fluid, forms emulsion, hang down the well in flow rate, multiphase flow, deflection and horizontal well, high capacity motor and/or major diameter wellhole, the especially oil industry.The well operating personnel can utilize the motor cooling effect of the conduction of heat and the raising of enhancing by many modes.Using under the situation of same power, cool motors more effectively, thus make operating temperature lower.Operating personnel can select to utilize this lower operating temperature to prolong the application life of motor.Lower temperature can also reduce resistance, thereby cuts down the consumption of energy.In contrast, operating personnel also can select to strengthen the electric power that is transported to motor, make motor be operated in the similar high temperature of prior art under.In this case, operating personnel have selected to replace long motor application life with high production rate, and this high production rate is owing to having used extra electric power to reach.
Cooling effectiveness when flowing through the motor hollow rotor shafts for the fluid that improves production preferably can produce turbulent flow in hollow rotor shafts.Preferablely be, not only in the coreless motor axle, turbulent flow arranged, and the eddy current of turbulent flow or downbeam is arranged in the annulus between motor casing and pit shaft, contact with the motor external surface when wherein the fluid of Sheng Chaning is flowed through described annulus.Turbulent flow can represent that Reynolds number is the function of fluid average flow velocity, kinematic viscosity and sleeve rotor shaft diameter with Reynolds number (dimensionless group).In general, Reynolds number about 2300 or higher expression have turbulent flow.The Reynolds number of the fluid of the production by the motor hollow rotor shafts preferably is at least about 3000.Reynolds number surpasses 5000 to 10000 just better.
Nusselt number is that another measures heat conducting dimensionless group.Nusselt number is the function of Reynolds number, Prandtl number (Pr and big fluid and wall place fluid absolute viscosity.For turbulent flow, high nusselt number (surpassing 10) expression is for having high thermal conductivity to fixed difference difference.Turbulent flow is strong more, and Reynolds number and nusselt number are high more.For laminar flow, low nusselt number (being lower than 5) expression convection heat transfer' heat-transfer by convection is relatively poor.When nusselt number is at least 10, preferably be at least 50 o'clock, the fluid of motor and production can have conduction of heat preferably, and method of the present invention is preferably under the condition that can reach this nusselt number and works.
Selected condition of work preferably can also make Brinkmann number (another dimensionless group) less than 2, preferably less than 0.5.Brinkmann number is represented heat conducting direction in the viscous fluid, is the function of the temperature difference between fluid average speed, fluid absolute viscosity, thermal conductivity and fluid and the hollow rotor shafts inwall.When Brinkmann number less than 2 the time, heat will be transferred to the colder production fluid from the motor of heat, and fluid friction can not increase extra heat to motor.When Brinkmann number less than 0.5 the time, the viscous dissipation effect can be ignored.
Because hollow rotor shafts is the power transmission shaft of motor, so can further describe condition of work according to Rossby number (another dimensionless group).It is that eddy flow or axial flow play a leading role that Rossby number is illustrated in the hollow rotor shafts.It is about 0.5 that selected condition of work should make Rossby number be at least, and preferably is at least about 1.0.Rossby number is the function of average flow velocity, fluid angular velocity and hollow rotor shafts internal diameter.
Another advantage of the present invention be the production fluid of gaseous state before entering pumping system can with fluid separation applications.Because the natural buoyancy of gas, the gas that enters drilling well by the hole above the pumping system can directly be moved upwards up to well head and the pumping system of can not flowing through.Liquid will flow downward and enter pumping system to be transported to well head, not have gas-entrained in a large number in the liquid.Therefore, be easy to make the gas of production and the fluid separation applications of production.Because the handled gas of pumping system is less, so can alleviate pumping gas-liquid mixture related pumping problem and low efficiency problem greatly.And, owing to do not need to be installed in main equipment or the gas separator that the above conventional system in hole uses, so can not bring other fault or power attenuation.
Claims (20)
1. method of sending fluid with the diving pumping systems pumps that comprises pump and motor, wherein, described motor has hollow rotor shafts, described pumping system can be by described hollow rotor shafts pumping at least a portion fluid, at least a portion fluid is taken away the heat of motor with the outside of the fluid way of contact by described motor when work.
2. method according to claim 1, it is characterized in that, in the latent fluid down of described pumping system, make the fluid of production take away heat with the fluid way of contact by the outside of described motor before entering described pumping system, then the fluid liquid of the producing described hollow rotor shafts of passing described motor when pumping is taken away more heats from described motor.
3. method of producing fluid from the drilling well that has sleeve, the fluid of production enters described drilling well by the hole of described sleeve, said method comprising the steps of:
(a) the electricity diving pumping system that will comprise motor is placed in the described sleeve, make described motor be positioned at least some places, described holes or below and
(b) with the described pumping system fluid that pumping is produced from described drilling well, wherein,
(1) described pumping system comprises pump, has the motor of hollow rotor shafts and is positioned at the following fluid intake of described motor, and described pumping system is by the fluid of the described production of described hollow rotor shafts pumping of described motor,
(2) the production fluid that enters described drilling well by at least some described holes before entering described fluid intake with the fluid way of contact by the outside of described motor take away heat and
When (3) fluid of the Sheng Chaning axial well head of described sleeve rotor that passes described motor moves, take away more heat from described motor.
4. method according to claim 3 is characterized in that, the fluid of described production passes the described hollow rotor shafts of described motor under the situation of turbulent flow.
5. method according to claim 4 is characterized in that, described motor is between described well head and described pump.
6. method according to claim 5, it is characterized in that, the production fluid that described hole by described sleeve enters described drilling well arrives intake with the outside that the fluid way of contact is downward through described motor, and the make progress fluid liquid of the described production of pumping of the described hollow rotor shafts of then passing described motor arrives described well head.
7. method according to claim 6 is characterized in that, the Reynolds number of the production fluid of the described hollow rotor shafts of flowing through is at least 2300.
8. method according to claim 7 is characterized in that, described motor contains the motor fluid that described relatively motor outside is in barotropic state, and has the seal that permission motor fluid infiltrates the fluid of described production.
9. method according to claim 7 is characterized in that, alternative condition make from described hollow rotor shafts and described motor external surface wherein at least one nusselt number that is transmitted to the heat of described production fluid be at least 10.
10. method according to claim 7 is characterized in that alternative condition makes Brinkmann number less than 2.
11. method according to claim 7 is characterized in that, alternative condition makes Rossby number greater than 0.5.
12. method according to claim 4 is characterized in that, described pump is between described well head and described motor.
13. method according to claim 4 is characterized in that, described electricity diving pumping system comprises two pumps, and one is positioned at more than the described motor, and another is positioned at below the described motor.
14. method according to claim 1 is characterized in that,
(a) described motor has hollow rotor shafts, and described pumping system has below described motor and the fluid intake that communicates with described hollow rotor shafts liquid;
(b) described pumping system has and is positioned at described motor place or at least one following outlet, and described outlet communicates with described fluid intake liquid;
(c) described pumping system is dived and is had in the drilling well of pit shaft down;
(d) cross section of described motor can be installed in the described pit shaft and between described pit shaft and described motor described motor and forms the space; With
When (e) described pumping system is worked, enter of the described hollow rotor shafts pumping of a part of fluid of described fluid intake by described motor, and another part fluid that enters described fluid intake pumps via described outlet, and upwards passes through the outside of described motor in the mode of fluid contact.
15. the method for a pumping fluid may further comprise the steps:
(I) pumping system is placed in the drilling well, makes described pump between described motor and described well head; Wherein,
(a) described motor has the hollow rotor shafts that communicates with described pump liquid;
(b) cross section of described motor can be installed in the described pit shaft and between described pit shaft and described motor described motor and forms the space;
(c) described pumping system has the first fluid intake that communicates with described hollow rotor shafts liquid;
(d) described pumping system has second fluid intake more than described motor, the described space liquid that forms between described second fluid intake and described pit shaft and the described motor communicates, have at least an outlet to be positioned at described motor place or following, described outlet communicates with described fluid intake liquid; With
(II) described pumping system is being worked like this under the condition, the first of described fluid enters described first fluid intake and the described hollow rotor shafts pumping by described motor, and the described space pumping of the second portion of described fluid by forming between described pit shaft and the described motor, and with the mode of fluid contact flow through described motor the outside and enter described second fluid intake, described first and second parts with described fluid are pumped into described well head then.
16. one kind provides motive mechanism, described mechanism comprises:
(I) power unit comprises:
(a) have the housing of outer wall;
(b) have the hollow rotor shafts at longitudinal axis and two ends, described hollow rotor shafts is installed in rotation in the described housing, can rotate with respect to described housing around its longitudinal axis; With
(c) be installed in drive system in the described housing, described drive system links to each other with described hollow rotor shafts, and described hollow rotor shafts is rotated with respect to described housing, wherein, described drive system comprises that several are installed in described housing and are positioned at the axial magnet of described sleeve rotor, and described magnet produces the magnetic force that described hollow rotor shafts is rotated with respect to described housing; With
(II) be positioned at the following pumping unit of described power unit, wherein,
(i) described pumping unit comprises and vertical hollow drive shaft of the described hollow rotor shafts fluid communication of described power unit, and when the described hollow rotor shafts of described power unit was rotated, described hollow drive shaft rotated around its longitudinal axis;
(ii) the described hollow drive shaft of described pumping unit has the axle inlet near its bottom, and fluid can be pumped in the described hollow drive shaft;
(iii) on the external surface of described hollow drive shaft at least one impeller is installed, makes that when described hollow drive shaft rotated, the downward pumping fluid of described impeller was to the described inlet of described hollow drive shaft; With
(iv) described pumping unit has the fluid intake near its top, and fluid pumps in the described pumping unit by described fluid intake; Described fluid intake, hollow drive shaft, axle inlet and impeller are arranged to, when described hollow drive shaft when its longitudinal axis rotates, fluid pumps into described pumping unit by described fluid intake, in described pumping unit, be moved down into described rotating shaft inlet, the described hollow rotor shafts of passing the described hollow drive shaft and the described power unit of described pumping unit then.
17. a method that obtains gas-liquid attitude fluid mixture from drilling well, described gas-liquid attitude fluid mixture enters described drilling well at least one position, said method comprising the steps of:
(I) pumping system is placed in the described drilling well, makes described pumping system be positioned at described gas-liquid attitude fluid mixture and enter more than the position of described drilling well, wherein,
(a) described pumping system comprises at least one power unit, at least one pumping unit and at least one intake, and fluid pumps in the described pumping system by described intake;
(b) described power unit has the hollow rotor shafts with described intake fluid communication, and described pumping system can will enter the described hollow rotor shafts pumping of the fluid of described intake by described motor;
(c) diameter of described power unit and pumping unit is less than the diameter of described drilling well;
(d) described intake is positioned at below at least a portion of described pumping system, and the diameter of described intake is at least less than the diameter of the described pumping system part above it;
(e) described intake be arranged to make by the fluid liquid of described pumping system pumping can flow through downwards described intake a part and enter in the described pumping system; With
(II) operate described pumping system, (i) described gaseous fluid is separated in the position near described intake with described fluid liquid, described position be positioned at a described pumping system part above the described intake below, (ii) described gaseous fluid is walked around the surface that described pumping system rises to described drilling well, (iii) described fluid liquid upwards is pumped to described intake, then flow through the downwards part of described intake is left described drilling well by the described hollow rotor shafts of described motor then.
18. method of sending fluid with the diving pumping systems pumps that comprises pump and motor, wherein, described pumping system is dived in the fluid of producing down, make when described fluid passes through described motor outside with the fluid way of contact, the described fluid vortex generator of flowing through makes the fluid of production produce the vortex of downbeam.
19. method according to claim 18 is characterized in that, described vortex generator is installed in the outside of described motor.
20. method according to claim 18 is characterized in that, described vortex generator is installed in the inner surface of motor shroud.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US27567701P | 2001-03-12 | 2001-03-12 | |
| US60/275,677 | 2001-03-12 | ||
| US09/838,744 US20020153141A1 (en) | 2001-04-19 | 2001-04-19 | Method for pumping fluids |
| US09/838,744 | 2001-04-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1507531A true CN1507531A (en) | 2004-06-23 |
| CN1281847C CN1281847C (en) | 2006-10-25 |
Family
ID=26957536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02809753.XA Expired - Fee Related CN1281847C (en) | 2001-03-12 | 2002-03-11 | Method for pumping fluids |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1379756A4 (en) |
| CN (1) | CN1281847C (en) |
| WO (1) | WO2002072998A1 (en) |
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| FR2725238B1 (en) * | 1994-09-30 | 1996-11-22 | Elf Aquitaine | INSTALLATION FOR OIL WELLS PROVIDED WITH A DOWNHOLE ELECTRIC PUMP |
-
2002
- 2002-03-11 EP EP02709817A patent/EP1379756A4/en not_active Withdrawn
- 2002-03-11 CN CN02809753.XA patent/CN1281847C/en not_active Expired - Fee Related
- 2002-03-11 WO PCT/US2002/007348 patent/WO2002072998A1/en not_active Application Discontinuation
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| CN102459809B (en) * | 2009-06-19 | 2015-03-25 | 哈里埃技术有限公司 | Improved down hole delivery system |
| CN102459809A (en) * | 2009-06-19 | 2012-05-16 | 哈里埃技术有限公司 | Improved down hole delivery system |
| CN103732854B (en) * | 2011-11-11 | 2017-08-22 | 哈里伯顿能源服务公司 | For guiding flow of fluid in fluid control systems, the autonomous fluid control components with the movable current divider according to density-driven |
| CN103732854A (en) * | 2011-11-11 | 2014-04-16 | 哈里伯顿能源服务公司 | Autonomous fluid control assembly having a movable, density-driven diverter for directing fluid flow in a fluid control system |
| CN103967871A (en) * | 2013-01-31 | 2014-08-06 | 通用汽车环球科技运作有限责任公司 | Method and apparatus for controlling an electric motor employed to power a fluidic pump |
| CN103967871B (en) * | 2013-01-31 | 2016-08-17 | 通用汽车环球科技运作有限责任公司 | For the method and apparatus controlling to be used for the electro-motor for fluid pump energy supply |
| CN105408581B (en) * | 2013-06-24 | 2018-07-24 | 沙特***石油公司 | In the combined pump and compressor and method of underground and surface production multiphase well fluids |
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| CN105408581A (en) * | 2013-06-24 | 2016-03-16 | 沙特***石油公司 | Integrated pump and compressor and method of producing multiphase well fluid downhole and at surface |
| US10677031B2 (en) | 2013-06-24 | 2020-06-09 | Saudi Arabian Oil Company | Integrated pump and compressor and method of producing multiphase well fluid downhole and at surface |
| US11162340B2 (en) | 2013-06-24 | 2021-11-02 | Saudi Arabian Oil Company | Integrated pump and compressor and method of producing multiphase well fluid downhole and at surface |
| CN111102209A (en) * | 2019-12-26 | 2020-05-05 | 东北石油大学 | Electric submersible pump backflow lifting device and backflow lifting method applied to low-yield well |
| US11371326B2 (en) | 2020-06-01 | 2022-06-28 | Saudi Arabian Oil Company | Downhole pump with switched reluctance motor |
| US11499563B2 (en) | 2020-08-24 | 2022-11-15 | Saudi Arabian Oil Company | Self-balancing thrust disk |
| US11920469B2 (en) | 2020-09-08 | 2024-03-05 | Saudi Arabian Oil Company | Determining fluid parameters |
| US11644351B2 (en) | 2021-03-19 | 2023-05-09 | Saudi Arabian Oil Company | Multiphase flow and salinity meter with dual opposite handed helical resonators |
| US11591899B2 (en) | 2021-04-05 | 2023-02-28 | Saudi Arabian Oil Company | Wellbore density meter using a rotor and diffuser |
| US11913464B2 (en) | 2021-04-15 | 2024-02-27 | Saudi Arabian Oil Company | Lubricating an electric submersible pump |
| US11994016B2 (en) | 2021-12-09 | 2024-05-28 | Saudi Arabian Oil Company | Downhole phase separation in deviated wells |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2002072998A1 (en) | 2002-09-19 |
| EP1379756A4 (en) | 2005-09-14 |
| CN1281847C (en) | 2006-10-25 |
| EP1379756A1 (en) | 2004-01-14 |
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