CN102741498A - System and method for a direct drive pump - Google Patents
System and method for a direct drive pump Download PDFInfo
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- CN102741498A CN102741498A CN2010800341152A CN201080034115A CN102741498A CN 102741498 A CN102741498 A CN 102741498A CN 2010800341152 A CN2010800341152 A CN 2010800341152A CN 201080034115 A CN201080034115 A CN 201080034115A CN 102741498 A CN102741498 A CN 102741498A
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- driving tube
- drive rod
- well
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Images
Classifications
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- 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
- E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1071—Wear protectors; Centralising devices, e.g. stabilisers specially adapted for pump rods, e.g. sucker rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
- F04D13/10—Units comprising pumps and their driving means the pump being electrically driven for submerged use adapted for use in mining bore holes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
Abstract
A method and a system are provided for a direct drive pump for use in pumping fluids and/or quasi-fluids from one location to another. In the direct drive pump, bearings or bushings are optimally spaced, taking into account various operational considerations such as load, path, pressure, and tension. Further, bearings or bushings are coupled to the drive string, thus assisting in more efficient installation and de-installation. The bearings or bushings are not fixed to the production casing or drive tube. In embodiments, the drive tube can be vented, and the production fluid can be used as a lubricant for the system bearings.
Description
Invention field
The present invention relates to be used for a kind of a kind of system and method for direct-driven pump, this system and method is used to move various liquid and/or quasi-liquid.The invention still further relates to a kind of system and method that is used to install a direct-driven pump, this direct-driven pump is for example to be used for from deep-well high volume being promoted.
Background
The current system that is used for the deep-well pumping relates to electronic submersible pump (" ESP ") or gear centrifugal pump (" GSP ").Such pump is the main method that promotes as the manual work in the two-forty oil well at present, and one of them centrifugal multistage pump multiple centrifugal pump is positioned at the down-hole.For example, in a kind of ESP system, a down-hole motor directly drives pump, and its electrical power is supplied to motor through the cable that extends to the down well placement of motor from the surface.For example, in a kind of GSP system, pump is to drive through a rotation roofbolt (rod string) that extends to a speedup transmission system that is positioned at the down-hole from the surface.This speedup transmission system is used for the rotation that this roofbolt is slow relatively and increases to the needed much fast rotation of a kind of pump.In this instance, this roofbolt is to be driven by the prime mover in the surface.
In present system, it is some trouble that this artificial lift system is tended to.For example, in the installation of present artificial lift system, one 300 to 400 feet manual pumps is installed in a plurality of 10 feet sections with kit form.Equally, in the maintenance of a particular section of pipeline or pipeline, before can carrying out any maintenance, must once remove the pump of whole section.
Figure 1A and Figure 1B show exemplary bobbin pump.Figure 1A shows a kind of bobbin pump of the bearing with water lubrication.In Figure 1A, this driving shaft directly extends in producing pipeline or column jecket.Different with instance shown in Figure 1B, this pump does not use oil pipe.What substitute is, in Figure 1A, driving shaft by the bearing of a plurality of water lubrications be attached at the center that a plurality of bearing cages on the column jecket are positioned at this column jecket.Owing in water, use, this class bearing typically is to be processed by rubber.The thrust of this pump is supported by the thrust bearing that is positioned at the surface together with the weight of this driving shaft itself.
Figure 1B shows a kind of bobbin pump of the bearing with an oil pipe and a plurality of oil lubrications.In Figure 1B, the driving shaft of an oil lubrication rotates in this oil pipe or the oily tubular shell that is full of.This driving shaft is supported by the bearing that is attached at regularly on the oil pipe, for example bronze bushes.The expection rotating speed that depends on this driving shaft, these axle bushes on the yhr oil pipe and along this driving shaft spaced apart for example 5 feet to 10 feet.In this instance, the pump shaft of this steel has formed the axle journal of bronze bushes.The thrust of this pump supports together with the weight of this driving shaft thrust bearing by the surface itself.Therefore, this oil pipe can be through in this column jecket, being positioned at the center along the even isolated elastic body centralizer of its length, shown in Figure 1B.
In Figure 1A and Figure 1B, in order suitably to support the bearing interval that there is a requirement in this driving shaft.The configuration of the tubular member that such interval influence is used in installation.For example, in the system of the water lubrication shown in Figure 1A, if these driving shaft bearings are needed as per 10 feet one, then employed column jecket is into 10 feet section.These bearing cages are fixed on this column jecket in these column jecket junctions.For example, in the system of the oil lubrication shown in Figure 1B, if these driving shaft bearings are needed as per 10 feet one, then employed oil pipe is into 10 feet section.These axle bushes are fixed on this drive shaft shell in these housing junctions.In these two instances, these pumping systems can be installed in a similar fashion.For example, if this bearing is considered to 10 feet at interval, it is 10 feet section that all component that then comprises this column jecket, oil pipe and driving shaft is into length.Therefore, when this pump was lowered in the well, each in 10 feet sections of these driving shafts, bearing and column jecket or oil pipe all must be installed in a plurality of 10 feet sections.
Therefore, just existences need come not install more troublesomely, dismantles and keep in repair pumping system, be used for oily and the water lubrication system the two.
Brief Description Of Drawings
Figure 1A shows a kind of bobbin pump of the bearing with water lubrication.
Figure 1B shows a kind of bobbin pump of the bearing with oil lubrication.
Fig. 2 shows an exemplary of described a kind of direct-driven pump according to an embodiment of the invention.
Fig. 3 shows a described according to an embodiment of the invention a kind of exemplary that has the drive rod of driving tube.
Fig. 4 shows a described according to an embodiment of the invention a kind of exemplary that does not have the drive rod of driving tube.
Fig. 5 A shows and is used for the sectional view of a stabilizer embodiment of described direct-driven pump according to an embodiment of the invention.
Fig. 5 B shows and is used for the vertical view of a stabilizer embodiment of described direct-driven pump according to an embodiment of the invention shown in Fig. 5 A.
Fig. 5 C shows and is used for the elevation of a stabilizer embodiment of described direct-driven pump according to an embodiment of the invention shown in Fig. 5 A.
Fig. 6 A shows and is used for the sectional view of a stabilizer embodiment of described direct-driven pump according to an embodiment of the invention.
Fig. 6 B shows and is used for the vertical view of a stabilizer embodiment of described direct-driven pump according to an embodiment of the invention shown in Fig. 6 A.
Fig. 6 C shows and is used for the elevation of a stabilizer embodiment of described direct-driven pump according to an embodiment of the invention shown in Fig. 6 A.
Fig. 7 A shows and is used for the sectional view of a stabilizer embodiment of described direct-driven pump according to an embodiment of the invention.
Fig. 7 B shows and is used for the vertical view of a stabilizer embodiment of described direct-driven pump according to an embodiment of the invention shown in Fig. 7 A.
Fig. 7 C shows and is used for the elevation of a stabilizer embodiment of described direct-driven pump according to an embodiment of the invention shown in Fig. 7 A.
Fig. 8 A shows and is used for the sectional view of a stabilizer embodiment of described direct-driven pump according to an embodiment of the invention.
Fig. 8 B shows and is used for the vertical view of a stabilizer embodiment of described direct-driven pump according to an embodiment of the invention shown in Fig. 8 A.
Fig. 8 C shows and is used for the elevation of a stabilizer embodiment of described direct-driven pump according to an embodiment of the invention shown in Fig. 8 A.
Fig. 9 A shows and is used for the sectional view of a stabilizer embodiment of described direct-driven pump according to an embodiment of the invention.
Fig. 9 B shows and is used for the vertical view of a stabilizer embodiment of described direct-driven pump according to an embodiment of the invention shown in Fig. 9 A.
Fig. 9 C shows and is used for the elevation of a stabilizer embodiment of described direct-driven pump according to an embodiment of the invention shown in Fig. 9 A.
Figure 10 shows according to an a kind of embodiment that has the direct-driven pump bottom hole assembly of driving tube of the present invention.
Figure 11 shows according to an a kind of embodiment that does not have the direct-driven pump bottom hole assembly of driving tube of the present invention.
Figure 12 shows an embodiment according to the driving tube of a kind of top drilling of the present invention.
Figure 13 shows according to a kind of illustrative methods that is used to install direct-driven pump of the present invention.
Specify
Embodiment of the present invention provide a kind of artificial lift pump easier to mount and maintenance, that in oil and water pump system, use.Or rather, embodiment of the present invention can be used for the deep-well pumping of oil, water or other fluid/quasi-fluids.
Embodiment of the present invention provide a kind of deep well pump system, this system and current pumping system allowed compare and can use at bigger degree of depth place and/or with bigger rotating speed.For example, it is that diameter is bigger that well tends to, and for example 10 inches to greater than 16 inches.Therefore, the agriculture centrifugal pump that can be used in the well requires large diameter pump rotor, and this has caused the increase greatly of every stage pressure.That is, every stage pressure and root diameter square and rotating speed square be proportional.The given this big diameter and the typically shallow degree of depth of well, the well turbine pump typically moves with the speed between about 1200RPM and the 1800RPM.Comparatively speaking, oil well trends towards using the internal diameter of about 5.5 inches or 7 inches to be about 4.6 inches to 6 inches production casing.Therefore, obtainable centrifugal pump requires the pump rotor of minor diameter, thereby the little increase of every stage pressure is provided.The little increase of this every stage pressure causes this pump to move with high speed (for example about 3500RPM).Even under high like this speed, because this little increase of every stage pressure and the typically dark degree of depth of oil well, for the position of the fluid that produces being taken to surface or other hope possibly require nearly 250 or more level.If this type of is used for pump operation under the typical rate (for example being used for well) of agricultural pump that oil is produced; Then for the position of the fluid that produces being taken to surface or other hope possibly require about 1000 grades or more, this is expensive and in this system, very galling will be arranged with the unreachable ground of height.In a plurality of embodiments of the present invention, this type of limiting factor of agricultural pump and oil pump systems and expense are able to alleviate or reduce.
Embodiment of the present invention provide a kind of installation of pump, wherein with present comparing that pumping system allowed bigger section pump can be installed.For example, in agricultural pump and oil pump, stablize this driving shaft through the bearing that is fixed on tubular driving shat housing (being oil pipe) or the column jecket.Making in these sections each all is equal length, makes like this when being installed to pump in the well, can bearing be fixed on column jecket or the oil pipe in the connection place of these area under control sections.In a kind of bearing arrangement of oil lubrication, bronze bushes is attached on these oil pipes, and one of them firm matter driving shaft has formed axle journal.In a kind of bearing arrangement of water lubrication, rubber shaft bearing is remained on the column jecket center with bearing cage.This driving shaft extends through this rubber shaft bearing and a stainless steel sleeve pipe as axle journal is housed.In agricultural pump (for example water pump) and oil pump systems, bearing is separately fixed on column jecket or the oil pipe.Therefore, as discussed above, the installation requirement of this type of obtainable system is assembled a plurality of pumping system sections (each 10 feet).Embodiment of the present invention provide the installation to bigger pumping system section (for example 25 feet sections, 60 feet sections and more).
Embodiment of the present invention provide a kind of artificial lift system of high volume, and promptly direct-driven pump (" DDP ") wherein drives a multistage down-hole centrifugal pump through a roofbolt that extends to down-hole pump from the surface.This roofbolt is located to be driven by prime mover (for example motor) on surface (for example face of land height).For example, this electronic function drives this roofbolt with the pump work speed of 3500RPM.In embodiments of the invention, this speed can reduce or increase, and this depends on required situation.
Embodiment of the present invention provide closely isolated bearing that the rotational stabilization of this drive post (drive string) is provided.In one embodiment, these independent bearings are attached on this drive post and are not fixed on production casing or the driving tube.
Fig. 2 shows the embodiment that a kind of direct-driven pump according to the present invention send system 220.In Fig. 2, shown that a motor 200 is connected on the residue element of this pump through a plurality of boll-weevil hangers and at least one thrust bearing 201.In one embodiment, motor 200 is motor that drive this roofbolt with whole pump speed.Alternatively, motor 200 is the direct drive motor of rotating with for example 3500RPM.Alternatively, this motor 200 has low output RPM,, is lower than 3500RPM that is, but has the gear drive of speedup ability.In this embodiment, by at pump and be connected to the pressure that pressure regulator 202 between the flowline 203 of pump is monitored this pumping system.This pressure regulator 202 is opened when the pressure reduction between this driving tube and this production pipeline surpasses a predetermined set value.Well head 204 is connected to the top of this pumping system with casing, and this pumping system comprises motor 200 and flowline 203.In protectiveness casing 205 inside, a production pipeline or pipeline 207 are arranged and held a drive rod 206.The bottom of this pumping system comprises a receiving element and one or more thrust bearing 208.In one embodiment, the thrust bearing 208 that has supported the weight of these drive rods is arranged in this surface drive head (drive head).Because high rotating speed, roofbolt 206 is equipped with along the closely isolated a plurality of stabilizers of the whole length of roofbolt or bearing to guarantee stable rotation.Show some example embodiment of this type of stabilizer at this.Perforation 209 in the well housing in oil-producing formation 212 zones (that is the place at water or oil and other liquid/quasi-liquid place) allows to be used for carrying out the position of pumping until surface or other hope through the pump 210 with a pump intake 211 in this liquid or the quasi-liquid entering casing.
Fig. 3 shows a described according to an embodiment of the invention a kind of embodiment with drive rod 304 of driving tube 301.For example, in larger sized production pipeline, drive rod 304 and stabilizer 305 rotate in the tubular shell of a minor diameter that is called as driving tube 301.Driving tube 301 is being produced pipeline 302 inner extensions.In order to stablize this driving tube 301, driving tube stabilizer 303 is spaced apart out between production pipeline 302 and driving tube 301.Within driving tube 301 itself, drive rod 304 is supported on the driving tube 301 by a plurality of drive rod stabilizers 305.
Fig. 4 shows a drive rod 402 and is directly wrapped in an embodiment of producing in the pipeline 401.Under these circumstances, drive rod 402 is supported to by a plurality of drive rod stabilizers 403 and produces on the pipeline 401.Such embodiment can be used under the situation than the production pipeline of minor diameter, wherein is not enough to and/or does not need a driving tube.
Fig. 5, Fig. 6 and Fig. 7 show and are used for according to the bearing assembly of a kind of direct-driven pump embodiment of not using driving tube of the present invention or a plurality of embodiments of stabilizer.Among each embodiment in these embodiments; Bearing assembly comprises and is attached at an axle bush on the body of rod; One of them bearing is installed in the housing (for example, the housing of a kind of plastics or other types), and the internal diameter of this housing and this production pipeline closely cooperates.Therefore this housing, also have this bearing, still fix with respect to this pipeline, wherein this roofbolt rotates in this bearing.Fig. 5 shows the example embodiment of a kind of pottery-polymer alloy bearing.In Fig. 5 A, polymeric shells and bearing 500 are positioned near the ceramic axle bush 501, and this pottery axle bush 501 is positioned on this drive rod 502.In Fig. 5 B, show this polymeric shells and bearing 500 around this pottery axle bush 501.Can obtain the flow region of a generation in polymeric shells 500 outsides.In Fig. 5 C, show an elevation of this assembly, wherein producing pipeline 503 inside, used a clamping band 504 to keep this around this housing 500 of a part of drive rod 502.
Fig. 6 shows a kind of example embodiment of non-aggressive bearing.In Fig. 6 A, polymeric shells and bearing 600 are positioned near the molded stop member 601 (for example molded plastics stop member), and this molded stop member 601 is positioned on this drive rod 602.In Fig. 6 B, show this polymeric shells and bearing 600 around this this drive rod 602.Can obtain the flow region of a generation in polymeric shells 600 outsides.In Fig. 6 C, show an elevation of this assembly, wherein producing pipeline 603 inside, used a clamping band 604 to keep this around this housing 600 of a part of drive rod 602.
A
Fig. 7 shows a kind of example embodiment of ceramic bearing.In Fig. 7 A, plastic casing and bearing 700 are positioned near the ceramic axle bush 701, and this pottery axle bush 701 is positioned on this drive rod 702.In Fig. 7 B, show this plastic casing and bearing 700 around this ceramic axle bush 701.Can obtain the flow region of a generation in plastic casing 700 outsides.In Fig. 7 C, show an elevation of this assembly, wherein producing pipeline 703 inside, used a clamping band 704 to keep this around this housing 700 of a part of drive rod 702.
In a plurality of embodiments of the present invention, the bearing material that use depends on the wearing and tearing and the lateral load of place, the position of bearings expection in well.For example, expecting the place that has high lateral load owing to the wellhole deviation, can use pottery or even the bearing of carbide.Perhaps for example, have the place of little side load, can use more simply and more cheap polymer alloy bearing in expection.This bear box material can be plastics, nylon, polymer alloy, or some other powerful, chemically inert materials.
In a plurality of embodiments of the present invention, can use dissimilar bearings.Can confirm to use which kind of bearing type according to the load of expection, the degree of depth of pump, use and other Considerations of driving tube.In Fig. 5 to 9, these bearings provide around the bear box fluid inequality aspect flowing.For example, when not using driving tube, these bearings are exposed to be produced in the fluid stream, therefore should the zone of opening for the speech that flows between bear box and the production insides of pipes be maximized so that reduce the pressure loss when fluid is flowed through these bearings.For example see Fig. 5 to Fig. 7.Perhaps for example, when having used driving tube, the fluid in this pipe is almost motionless, and these bear boxes only need carry out cutting sufficiently so that allow to run through the low rate circulation of this drive post.For example see Fig. 8 and Fig. 9.
Fig. 8 and 9 shows and is used for according to a plurality of bearing assemblies of a kind of direct-driven pump embodiment with driving tube of the present invention or the embodiment of stabilizer.Among each embodiment in these embodiments; Bearing assembly comprises and is attached at an axle bush on the body of rod; One of them bearing is installed in the housing (for example, the housing of a kind of plastics or other types), and the internal diameter of this housing and this driving tube housing closely cooperates.Therefore this housing, also have this bearing, still be in respect to this driving tube housing and fix, wherein this roofbolt rotates in this bearing.
Fig. 8 shows the example embodiment of a kind of pottery-polymer alloy bearing.In Fig. 8 A, polymeric shells and bearing 800 are positioned near the ceramic axle bush 801, and this pottery axle bush 801 is positioned on this drive rod 802.A driving tube 805 is around this assembly.In Fig. 8 B, produce pipeline 803 around driving tube 805, this driving tube is around this bearing assembly.In Fig. 8 C, show an elevation of this assembly, wherein in driving tube 805, used a clamping band 804 to keep this around this housing 800 of a part of drive rod 802.
Fig. 9 shows a kind of example embodiment of ceramic bearing.In Fig. 9 A, plastic casing and bearing 900 are positioned near the ceramic axle bush 901, and this pottery axle bush or bearing 901 are positioned on this drive rod 902.A driving tube 905 is around this bearing assembly.In Fig. 9 B, show this production pipeline 903 around driving tube 905, this driving tube is around this bearing assembly.In Fig. 9 C, show an elevation of this assembly, wherein in driving tube 905 inside, used a clamping band 904 to keep this around this housing 900 of a part of drive rod 902.
In a plurality of embodiments of the present invention, this bearing assembly or configuration provide these tubular member and this drive post to move individually and sequentially, rather than side by side carry out as in the pumping system that can get at present.In a plurality of embodiments of the present invention, this bearing assembly allows the pipe of independent section and drive post longer far away, because these bearings are not attached on the connector of these tubular member.Therefore, these connectors can be spaced apart greatly widelyer, and needn't place and adjust for before necessary bearing.Therefore, this has allowed the easier relatively service and repair to pumping system.For example, when this pump required service, these drive rods and/or tubular member can disposablely pull out from well and return in the well subsequently with big length (for example several feet, 100 feet length etc.).Further, in one embodiment, these pipe jointers are threaded, rather than have the flange attachment, for example shown in image pattern 1A and the 1B, have therefore improved sealing integrity and installation rate greatly.
In one embodiment of the invention, this type of bearing assembly is installed on the drive rod allows these bearings according to the desired location best of the condition in the well.For example, such condition possibly comprise the tension force of bar and the possible side load in the well, for example, because the wellhole deviation.In an example, the rotational stabilization of a drive post is with the bar tension variation.That is, tension force is high more, and the rotation of bar is stable more.Yet near the pump place, this bar possibly have little tension force in the shaft bottom.Therefore, in pump this position in well, distance between bearings needs spatially more near so that guarantee stable rotation.Likewise, when upwards advancing towards the surface along the hole, the tension force of bar increases along with the increase of the weight of the bar that effectively is suspended in the below.Therefore, the spacing of these bearings can increase in this scope.That is, at bar tension force maximum, can be the wideest and remain enough effective along the relative distance between bearings of drive rod.In one embodiment of the invention, a kind of drive rod of optimization has the next isolated bearing of the requirement that is determined according to bar tension force.
Under actual conditions, oil well or well usually neither straight fully neither be vertical.Therefore, the drive rod that in having the pipeline of minor diameter, rotates possibly be forced to the side owing to the deviation of well direction, thus be positioned at this deviation range and/or near bearing on cause lateral load.These drive rod bearings mainly are designed to keep roofbolt stably to rotate and expect that normally they only are exposed in the little lateral load.Yet, if expection side load because wellhole deviation and unusual high, can be installed the specific bearing that is designed to side load resistance in expection has those zones of high side load, like Fig. 5 ceramic bearing shown in Figure 9 extremely.
In a plurality of embodiments of the present invention, owing to the structure of pumping system needs easier to safeguard.In one embodiment, needn't remove miscellaneous part and just can remove these one or more drive rods.Allow easier " tuning " like this or adjust this pumping system to be used for the operating condition that changes/ changed or to be used for conventional maintenance.For example, if changed a kind of operating condition such as pump speed, then can replace this or these drive rod with other one or more drive rods with more useful bearing type, configuration and/or distribution.For example, increase liquid yield if increase pump speed, then can with have disalignment hold distribution, come easily to replace these drive rods to the higher drive rod that rotating speed designed.Equally, if in one or more drive rods, occur losing efficacy, thereby the drive rod that then can promptly move one or more replacements in the down-hole minimizes downtime.
A plurality of embodiment of the present invention provides the pumping at bigger degree of depth place.Present obtainable bobbin pumping system typically has less than 1500 feet pressure head capacity and therefore extends to the degree of depth less than 1000 feet.The pipeline of shorter length and driving shaft cause a kind of a spot of stretching, extension of these parts, for example owing to water column weight and/or thrust of pump in the operating process.Such stretching, extension allows the support thrust bearing of driving shaft is positioned at the surface.For example see Figure 1A and Figure 1B, like above description.This allows the relative length of these parts is carried out little manual adjustment, makes impeller of pump (not only reverse ground but also axially fixedly be attached on the driving shaft) freely rotate like this.Yet; In a plurality of embodiments of the present invention; The bigger degree of depth of the permission of given these parts and therefore bigger hydrostatic educational level; Then between the production pipeline of attached pump and these drive rods and/or driving tube, there be bigger relatively moving far away, thereby allow manual adjustment scope more flexibly.
In Figure 10, show an embodiment that has the direct-driven pump bottom hole assembly of driving tube according to of the present invention.In such embodiment, can with this pump driving shaft thrust bearing directly place this pump directly over or the below.This pump driving shaft is connected through a spline by this or these drive rod 1000 with a plurality of rotors or spline rod connector 1005 drives, this connector allow to produce between pipeline and this or these drive rod 1000 significantly relative to vertically to move and allow this pump driving shaft and a plurality of rotor simultaneously be axially to fix with respect to the pump body still.In one embodiment, there is an other thrust bearing that is positioned at the surface to deal with the weight of this drive post.For example see Fig. 2.In Figure 10, produce pipeline 1003 around driving tube 1001, this driving tube is around drive rod 1000.A plurality of stabilizers 1002 are positioned on the drive rod 1000 and are spaced apart to support it.A bottom driving tube discharge orifice 1004 is arranged within driving tube 1001 itself.Figure 10 further shows a closed hole driving tube and connects 1006, thrusts formula receiving element 1007, thrusts relation and relative position between formula receiving element floss hole 1008, thrust bearing 1009, pump 1010 and the pump intake 1011.
Figure 11 shows according to one of the present invention and is similar to embodiment shown in Figure 10, except not having driving tube 1001.In this embodiment, still adopt a spline to connect 1105.Further, show and use a thrust bearing 1101, polycrystalline diamond (PCD) thrust bearing for example, it is positioned at the pump below and above pump intake.
Figure 12 shows an embodiment that has the driving tube of top drilling according to of the present invention.Figure 12 shows the just section of an amplification below well head 1201 of this pumping system.A casing 1208 is around production pipeline 1200, and this produces pipeline 1200 around driving tube 1203.This driving tube 1203 is shown in has a plurality of floss holes 1202 so that allow fluid to flow in its upper area.Move at running owing to be arranged in the drive rod 1204 of driving tube 1203, these drive rod stabilizers 1205 are positioned on this bar and support this bar.In the operating process of this embodiment, fluid is mobile and move up towards the surface from driving tube 1203 in producing pipeline 1200, driving tube 1203 in.
In a plurality of embodiments of the present invention, can use different sliding agents to these bearings.For example, in embodiment, can use one to have more that the driving tube of minor diameter comes this drive rod of clad with a big production housing or pipeline.Can this driving tube be centered in this production pipeline and be used for substantive this drive rod of protecting and avoid the corrosion and the dirt deposition that possibly take place in the fluid stream therein of generation.In such embodiment, must be to the lubricated miscellaneous part of selecting to make it can not influence this system of bearing, for example sealing between the parts or the like negatively.For example, in some systems, use oil as sliding agent.In such system, a kind of oil lubricant possibly be useful at more shallow degree of depth place.Yet, use between fluid that oil lubricant possibly produce in producing pipeline and the oil in the driving tube at relatively bigger degree of depth place and to cause sealing problem.Such problem possibly be that the density contrast between (for example, typically water) produces because the well fluids of this lubrication oil and generation.For example, locate, have the lubrication oil cylinder of 0.9 proportion and the pressure differential that has between the water of 1.0 proportion is almost 260psi at 6000 feet degree of depth place in the dark degree of depth (for example 6000 feet).And in a pumping system, if the fluid that produces and this lubrication oil are kept separating, this 260psi pressure differential when then these seals in the driving tube bottom that oil is filled must resist 3500RPM and sealing.This pressure condition possibly propose potential operating difficulties.Alternatively, can the oil column of surface be pressurized to 260psi, make that like this this oil column is that equate or almost equal with the bottom pressure of the fluid column of generation, thereby it be poor on these seals, to ease off the pressure.This replacement scheme has also proposed operating difficulties.For example, if in surface production pressure and in well shutting in and start-up course, there is any variation, then need changes the surface pressing that comes in the driving tube and adjust to the expection in the bottom-hole producing pressure (PBHP).In another replacement scheme, can use a kind of oil lubricant that similar density is arranged with glassware for drinking water, make that like this fluid pressure in these two posts is approximately to equate in the shaft bottom.This has also proposed difficulty, and promptly such oil is that synthesize and therefore high expensive unreachablely.In a plurality of embodiments of the present invention, these difficulties are overcome.For example, the driving shaft of a water lubrication provides the benefit of the system of oil lubrication in one embodiment of the invention, and does not have operating difficulties, sliding agent cost and/or pressure balanced problem.The system of this water lubrication is included in the driving shaft that rotates in the driving tube of minor diameter, and is equipped with closely isolated bearing so that rotational stabilization to be provided, as in this discussion.In one embodiment, this driving tube is not isolated with the fluid-tight that produces.The fluid filled that produces this driving tube and as bearing lubricant.Make in the embodiment of water as sliding agent at such one, can use the bearing that designs to water lubrication.This class bearing can use the design of pottery, carbide or be designed to the polymer alloy bearing, this depends on load and wearing and tearing requirement, as in this discussion.As shown in Figure 12, driving tube is controlled the flow rate that makes progress along driving tube so that discharge the oil in this pipe, collected or gas and permission in surface perforate to production flowline.In one embodiment, the driving tube perforate is got in the production pipeline of well head below, thereby the fluid that allows to produce upwards flows along driving tube continuously.This can improve the cooling of lubricating and/or improving these bearings.In one embodiment, filling driving tube with the fluid that produces may be provided in originally and two benefits of reliability.In this embodiment, these driving shaft seals at pump assembly place are unwanted.But, use an axle bush (for example carbide) that this axle is centered in the bottom of driving tube.This driving tube is moved freely in this driving tube of entering with the fluid that allows to produce by perforate in the bottom, thereby guarantees that these driving shaft bearings are immersed in the fluid always.In one embodiment; If the fluid that produces is corrosive or is easy to incrustation; Then can use the selection of production flow line perforate, thereby be motionless basically because can control the fluid that makes in the driving tube closely to the flow rate that makes progress along driving tube.Therefore, having significantly reduced on drive post and/or bearing any of corrosion or incrustation maybe.In such embodiment, when lacking continuous moving, any remaining dirt and corrosive component will have minimum effect in the motionless water column that generates.
Therefore in one embodiment, this driving tube is open into pump discharge, and when it is full of by liquid fully, the pressure of surface will equal pump discharge pressure and deduct the fluid pressure that the static liquid scapus is applied in the pipe.To equal pump discharge pressure and deduct the fluid pressure that the static liquid scapus applied and deduct producing pressure that pipe outlet is in the surface owing to produce the friction pressure drop that fluid flows and causes in the pipeline.Therefore, flow as long as in pipeline, exist, the pressure at this place, driving tube top just will be greater than the surface production pipeline pressure, and its difference is the pressure drop that flowage friction causes.This difference can be used for removing the gas that will be accumulated in place, driving tube top naturally.Because this driving tube is open for the production fluid of well, so some gases and/or oil can be along the upwards migrations of this driving tube in process of production.At last, these oil and/or gas will have been replaced the water in the driving tube fully.Even if gas has been filled the part of this pipe, this situation is more serious, the shortage fluid lubricant because the bearing on top possibly become, thus cause final bearing failure.
In one embodiment, a driving tube can be equipped with and lead to the discharge pipe line of producing pipe outlet, and this pipeline can be equipped with a pressure regulator, and this pressure regulator is at driving tube and produce and open when pressure differential between the pipeline surpasses setting value.Possibly be accumulated under the situation in the driving tube at oil and/gas, the pressure set points of this pressure regulator possibly set after the friction loss pressure drop of considering to be higher than this expection, makes this valve only after the such accumulation of generation, open like this.Therefore; Along with oil and gas are accumulated at the driving tube top; Can be set to periodically open so that from pipe, discharge some oil and gas by this valve of regulating that is stressed, thereby keep the water of the constant basis in the driving tube, make that like this these bearings are lubricated always.
In an embodiment not paying special attention to corrosion or incrustation, then can use the embodiment of this driving tube discharging.In this embodiment, this driving tube is in bottom opening, but exists one just below well head, to get into and produce ducted other driving tube floss hole (like Figure 12).In the production operation process,, possibly there is significant friction pressure drop in the production pipeline between shaft bottom and surface owing to produce ducted high flow rate.Therefore, the fluid pressure of the driving tube of surface inside is ducted bigger than adjacent production.This difference can be used for forcing low velocity fluid upwards to flow and from the top discharge mouth, flow out along driving tube, thereby the lasting circulation that the fluid that causes producing makes progress along driving tube is lubricated and cool off these bearings.Any oil and/or the gas that get into this driving tube also will pass the top discharge hole, cause the gas buildup chance that lacks enough sliding agents thereby eliminated, as discussed above.
In these embodiments, the constant flow through water provides effective cooling of stabilizer bearing and lubricated.For example see Figure 12.Such cooling and to lubricate possibly be crucial under the situation of well devious is because these stabilizer bearings are owing to heavier side load is experienced in the bending of this drive post.In one embodiment, the continuous-flow that makes progress along driving tube of this production flow line discharging fluid that generation also can be provided is so that together cooling is positioned at the bearing in this zone.Further; The discharging of this production flow line can provide, through only opening liquid that a control valve allows desired amount along make progress continuous-flow and getting in the production flowline so that remove any oil and/or the gas of in driving tube, accumulating continuously of driving tube.
A plurality of embodiment of the present invention helps more easily installing a well pump.Figure 13 shows a kind of exemplary method that direct-driven pump is installed, and this direct-driven pump has a driving tube and drive rod of embodiment shown in Fig. 2 and Fig. 7.Generally, in oilfield operations, use well service equipment that a pump assembly is installed in the well.This well service equipment have a brandreth tower, a plurality of winch and allow auxiliary equipment that tubular member stretches into and pull out with and other equipment of in well, using.This bottom hole assembly (comprising multistage pump, thrust bearing and a drive rod and driving tube receiving element) was attached on the production pipeline 1301 of a length through a kind of connection the (for example being threaded).The production pipeline of this length typically comprises the 2-section pipe road, and each length is 30 feet, and links together through for example a kind of being threaded, and forms one section about 60 feet long pipeline thus.This pump assembly and single section pipeline transferred through this well service equipment enter into well 1302 about 60 feet, and this pipeline is fastened in the well head 1303.The pipeline of 60 feet of another sections attached 1304 is attached on this bottom hole assembly to this section pipeline that is fastened in the well head and with it through for example a kind of being threaded.Whole assembly is transferred 1305 other 60 feet and another section be attached on this production pipeline.This process continuation is arranged in well 1306 desirable degree of depth places and should produces pipeline until this bottom hole assembly and is fastened on well head.Next; To constitute by a plurality of 60 feet intercept (two 30 feet the joint that connects through being threaded), have more the driving tube of minor diameter and be inserted into and produce in the pipeline 1307 and will extend to the bottom, its mode with will produce the extension of pipeline and bottom hole assembly and be fixed on similar in the well head 1308.This driving column jecket is equipped with a plurality of centralizers to make it to be positioned at concentrically in this production pipeline, for example referring to Fig. 2 and Fig. 3.This drive post also is equipped with a convex that closely cooperates to thrust the formula member in the bottom, this member is put in the driving tube closed hole receiving element in this bottom hole assembly.This closed hole assembly with this driving tube orientate as make it in this bottom hole assembly around this drive rod receiving element placed in the middle (for example referring to Figure 10), also allow simultaneously between this driving tube and the bottom hole assembly relative to vertically move.The a plurality of drive rods that have a plurality of stabilizers that make into 50 to 70 feet intercept then extend in this driving tube inside, and its mode is similar with the mode 1309 of extending driving tube.These drive rods typically are 25 feet or 30 feet long, and are attached to one another through a plurality of threaded connectors.This drive rod is extended the bottom and drive rod that the spline rod connector is thrust in the bottom hole assembly thrusts in the formula receiving element.For example see Figure 10.This spline connect allow this bar to drive this centrifugal pump rotatably but provide between these drive rods and this bottom hole assembly relative to vertical moving.Do not use the direct drive pump of driving tube to install in the same way.Difference is in direct drive pump, not install driving tube.But,, bottom hole assembly and production pipeline post directly this drive rod is stretched into after being extended proper depth and be fastened in the well head.The installing drive head makes this drive rod can be rotated (for example seeing Fig. 2) by motor then, drives the centrifugal multistage pump multiple centrifugal pump in the bottom hole assembly 1310 thus.This Surface runoff pipeline is attached on the well head 1311 and pump is ready to for operation.Can use this Surface runoff pipeline that the well fluids that this pump promoted is delivered to the position of any hope then, near reservoir vessel for example or the like.
Be understood that to have very clearly the present invention and other variants of different aspect and the embodiment of modification, and the present invention does not receive the restriction in the specific embodiments of this explanation like those of ordinary skills.More than characteristic and the embodiment of explanation can or mutual combination not.The consideration of making hereby is any and whole modifications, variant, combination or the equivalent that has covered within the scope of the basic cardinal principle that falls within this disclosure and propose claim.
Claims (17)
1. direct-driven pump system comprises:
A casing, this casing are the housings of this direct-driven pump system;
A pump, this pump have a pump intake of a lower end that is positioned at this casing;
A production pipeline;
One drives mast, and this driving mast is positioned at this production pipeline;
In stabilizer and the bearing at least one, at least one is disposed in this in stabilizer and the bearing on this driving mast and to this driving mast and plays a supportive role so that guarantee the stable rotation in this pump operation process;
Wherein, thus this pump that is arranged in this casing in the down-hole drive this drivings mast rotate impel pressurization well fluids from this pump towards the surface to aboveground mobile for production.
2. pumping system as claimed in claim 1, wherein, this in stabilizer and the bearing at least one along the whole length of this driving mast by closely spaced apart so that guarantee the stable rotation in this driving mast running.
3. pumping system as claimed in claim 2; Wherein, this in stabilizer and the bearing at least one be bearing assembly, axle bush, be installed in bearing in the housing, be installed at least one in bearing, ceramics polymer alloy bearing, ceramic axle bush, non-aggressive bearing and the ceramic bearing in the plastic casing.
4. pumping system as claimed in claim 2, wherein, this fluid passes through around an external surface of this production pipeline is mobile.
5. pumping system as claimed in claim 2 comprises:
A driving tube, this driving tube are positioned at this production pipeline; And
At least one centralizer;
Wherein, this at least one centralizer is associated with this driving tube and supports this driving tube, makes that this driving tube keeps being positioned at this production pipeline center well, and this driving mast and its stabilizer are positioned at this driving tube.
6. pumping system as claimed in claim 2, wherein, this fluid passes through around an external surface of this driving tube is mobile.
7. pumping system as claimed in claim 1 further comprises a pressure regulator between a well pump and production flowline,
Wherein, this pressure regulator is opened when the pressure reduction between this driving tube and this production pipeline surpasses a predetermined set value.
8. pump as claimed in claim 1; Drive this driving mast thereby further comprise a motor so that drive this pump; Wherein, This motor is a motor that drives this roofbolt with one of following speed effectively, has a low RPM operating rate of speedup ability gear drive that is:, and the pump work speed of about 3500RPM.
9. pump as claimed in claim 1, wherein, this pump provides of well fluids high volume artificial lift system.
10. method that is used for direct-driven pump is installed in well comprises:
A bottom hole assembly is connected on the production pipeline of one first length;
The production pipeline of this bottom hole assembly and this first length is transferred in the well;
Should produce pipeline is fastened in the well head;
The production pipeline of an extra length is connected on the production pipeline of this first length;
The production pipeline of this extra length is transferred in this well of entering;
The driving tube of one first length is transferred to these produce duct length inside;
The driving tube of this first length is fastened on this well head;
The driving tube of an extra length is connected on the driving tube of this first length;
The driving tube of this extra length is transferred to these produce duct length inside;
It is inner that at least one drive rod of one first length is transferred to this driving tube, and this at least one drive rod has at least one stabilizer that is used for supporting at the driving tube of this correspondence length this drive rod;
At least one drive rod of an extra length is connected at least one drive rod of this first length;
It is inner that at least one drive rod of this extra length is transferred to this driving tube; And
A driving head is attached to makes the drive rod of these length to rotate so that in this bottom hole assembly, drive this pump on this production pipeline, driving tube and the drive rod by a motor.
11. method as claimed in claim 10; Wherein, The production pipeline of multiple-length more being attached in order on the production pipeline of this extra length the production pipeline that in this well, reaches a desirable degree of depth and these length up to this bottom hole assembly is secured on this well head
The driving tube of multiple-length more is attached in order on the driving tube of this extra length and is fixed on this well head up to the driving tube that in this well, reaches a desirable degree of depth and these length, and
At least one drive rod of multiple-length more is attached in order at least one drive rod of this extra length and is supported in this driving tube by a plurality of stabilizers up to this at least one drive rod that in this well, reaches a desirable degree of depth and these length.
12. method as claimed in claim 11, wherein, this bottom hole assembly comprises a multistage pump, a thrust bearing, a drive rod and a driving tube receiving element.
13. method as claimed in claim 12, wherein, at least one in the production pipeline of the driving tube of at least two length, at least two length and the drive rod of at least two length cooperates through a kind of being threaded.
14. method as claimed in claim 13, wherein, each corresponding length is two 30 feet section, and these two sections are joined together and are lowered in this well as a single length.
15. method as claimed in claim 14; Wherein, The drive rod of this length at one end comprises a spline rod connector and comprises that at the other end thrusts a formula receiving element, when this of drive rod that makes this spline rod connector when the drive rod of this first length run into this extra length like this thrusts the formula receiving element.
16. method as claimed in claim 15 wherein, is attached to a Surface runoff pipeline on this well head.
17. a method that is used for direct-driven pump is installed in well comprises:
A bottom hole assembly is connected on the production pipeline of one first length;
The production pipeline of this bottom hole assembly and this first length is transferred in the well;
Should produce pipeline is fastened in the well head;
The production pipeline of an extra length is connected on the production pipeline of this first length;
The production pipeline of this extra length transferred enter into this well;
At least one drive rod of one first length is transferred to this production pipe interior, and this at least one drive rod has at least one stabilizer that is used for supporting at the production pipeline of this correspondence length this drive rod;
At least one drive rod of an extra length is connected at least one drive rod of this first length;
At least one drive rod of this extra length is transferred to this production pipe interior; And
A driving head is attached to makes the drive rod of these length to rotate so that in this bottom hole assembly, drive this pump on this production pipeline and the drive rod by a motor.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US23348809P | 2009-08-12 | 2009-08-12 | |
| US61/233,488 | 2009-08-12 | ||
| US23382609P | 2009-08-13 | 2009-08-13 | |
| US61/233,826 | 2009-08-13 | ||
| US12/552,806 US8336632B2 (en) | 2009-09-02 | 2009-09-02 | System and method for direct drive pump |
| US12/552,806 | 2009-09-02 | ||
| PCT/US2010/045377 WO2011019958A2 (en) | 2009-08-12 | 2010-08-12 | System and method for a direct drive pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102741498A true CN102741498A (en) | 2012-10-17 |
| CN102741498B CN102741498B (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080034115.2A Expired - Fee Related CN102741498B (en) | 2009-08-12 | 2010-08-12 | For a kind of system and method for direct-driven pump |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP2464820B1 (en) |
| CN (1) | CN102741498B (en) |
| AR (1) | AR079097A1 (en) |
| AU (1) | AU2010282441B2 (en) |
| BR (1) | BR112012003240A2 (en) |
| CA (1) | CA2770853C (en) |
| MX (1) | MX2012001735A (en) |
| PE (1) | PE20110174A1 (en) |
| RU (1) | RU2554380C2 (en) |
| WO (1) | WO2011019958A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111601971A (en) * | 2018-02-22 | 2020-08-28 | 尼得科Gpm有限公司 | Coolant pump with optimized bearing arrangement and improved thermal efficiency |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10151341B2 (en) * | 2015-08-27 | 2018-12-11 | General Electric Company | Load-limiting thrust bearing system and an associated method thereof |
| CN112940866B (en) * | 2021-02-19 | 2023-06-16 | 广州三井化妆品有限公司 | Oil-water separation device for extracting plant essential oil |
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- 2010-08-12 CA CA2770853A patent/CA2770853C/en not_active Expired - Fee Related
- 2010-08-12 CN CN201080034115.2A patent/CN102741498B/en not_active Expired - Fee Related
- 2010-08-12 PE PE2010000514A patent/PE20110174A1/en active IP Right Grant
- 2010-08-12 AU AU2010282441A patent/AU2010282441B2/en not_active Ceased
- 2010-08-12 MX MX2012001735A patent/MX2012001735A/en active IP Right Grant
- 2010-08-12 AR ARP100102959A patent/AR079097A1/en active IP Right Grant
- 2010-08-12 EP EP10808786.7A patent/EP2464820B1/en not_active Not-in-force
- 2010-08-12 RU RU2012106458/06A patent/RU2554380C2/en active
- 2010-08-12 WO PCT/US2010/045377 patent/WO2011019958A2/en active Application Filing
- 2010-08-12 BR BR112012003240A patent/BR112012003240A2/en not_active Application Discontinuation
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| US2171171A (en) * | 1938-06-09 | 1939-08-29 | Brauer Walter | Well pump |
| US5309998A (en) * | 1992-11-19 | 1994-05-10 | Intevep, S.A. | Pumping system including flow directing shoe |
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Also Published As
| Publication number | Publication date |
|---|---|
| AU2010282441A1 (en) | 2012-02-09 |
| AR079097A1 (en) | 2011-12-28 |
| CA2770853C (en) | 2017-12-12 |
| EP2464820A4 (en) | 2015-11-04 |
| CA2770853A1 (en) | 2011-02-17 |
| EP2464820A2 (en) | 2012-06-20 |
| MX2012001735A (en) | 2012-03-29 |
| EP2464820B1 (en) | 2017-09-27 |
| WO2011019958A2 (en) | 2011-02-17 |
| PE20110174A1 (en) | 2011-04-15 |
| RU2554380C2 (en) | 2015-06-27 |
| RU2012106458A (en) | 2013-08-27 |
| BR112012003240A2 (en) | 2017-03-21 |
| WO2011019958A3 (en) | 2012-03-01 |
| CN102741498B (en) | 2016-05-04 |
| AU2010282441B2 (en) | 2016-06-02 |
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