CN101275571B

CN101275571B - Submersible pumping system

Info

Publication number: CN101275571B
Application number: CN200810009948.8A
Authority: CN
Inventors: 多尔尼亚克·厄贾兰
Original assignee: Prad Research and Development Ltd
Current assignee: Prad Research and Development Ltd
Priority date: 2007-02-17
Filing date: 2008-02-15
Publication date: 2013-07-17
Anticipated expiration: 2028-02-15
Also published as: CN101275571A

Abstract

A technique is provided for pumping fluids in a subterranean wellbore. A submersible pumping system can be deployed in a wellbore for moving desired fluids within the wellbore. The pumping system energizes the desired fluid movement by reciprocating a working fluid between expandable members.

Description

Submersible pumping system

The cross reference of related application

File of the present invention is the part continuation application of the U. S. application 11/308,623 of submission on April 13rd, 2006, and this U. S. application is based on the U.S. Provisional Application sequence number of submitting on May 27th, 2,005 60/595,012 and require its preference.

Technical field

The present invention relates to a kind of for the system and method at underground environment such as well pumping fluid.

Background technique

Completion is used for the relevant application of various wells, comprises for example production or the injection of fluid.Usually get out well, and by pipe-line system or other deployment mechanism completion system is transferred to well.Well can be drilled through the one or more fluid of needs such as stratum of hydrocarbon-based fluids contained.

In many these are used, pump fluid into the position that needs.For example, for various injections or other well treating process, can use pumping system to pump fluid into well and on every side in the reservoir.Yet pumping system also is used for from the artificial lifting fluid of underground position.For example, submersible pumping system can be positioned at well well fluid is produced the assembling position of needs, for example at the assembling position on the face of land.Yet according to the particular type of the conventional submersible pumping system of the application that is used to specify, these systems may be comprised lower system effectiveness, high capital cost and/or less than the hardship of various harmful characteristic of the reliability of needs.

Summary of the invention

In general, the invention provides a kind of for the system and method at underground environment such as well pumping fluid.Use the fluid that submersible pumping system moves to be needed, as the hydrocarbon-based fluids that originates from reservoir.Pumping system comprises the pump that utilizes the working fluid that holds to replace the fluid of needs with active.The movement of the working fluid that holds by the control system guiding with unique valve of settling, described valve is guiding flowing along repeated flow process automatically.

In one aspect, the invention provides a kind of in well the system of pumping fluid, described system comprises: have the pump casing of fluid input and fluid output, described pump casing has a pair of chamber; A pair of expandable members is wherein with in one in the described expandable members each chamber that is configured in described a pair of chamber; Working fluid; And hydraulic control system, it controls the to-and-fro motion of described working fluid from an expandable members to another expandable members, the pucker ﹠ bloat successively of the described expandable members that produces sucks well fluid in the chamber, from another chamber, discharge well fluid simultaneously, described to-and-fro motion is controlled by control valve, described control valve is by having guiding valve and having and the sensed system of the sequence valve that guiding valve is connected in series switches between flow locations, wherein said guiding valve also connects with the form that fluid between described sequence valve and described control valve is communicated with, and described guiding valve is to switch between flow locations according to the pressure in described a pair of expandable members.

In yet another aspect, the invention provides a kind of pump of mobile well fluid, described pump comprises: the pump casing with the outlet of well fluid entrance and well fluid; First Room that has first expandable members therein; Second Room that has second expandable members therein; Working fluid, described working fluid are isolated with to-and-fro motion between first expandable members and second expandable members; With the control system with control valve, described control valve is allowing described working fluid switching successively between the reciprocating position between first expandable members and second expandable members, the sequentially-operating of described control valve is to be controlled by the sensed system of the upstream that is positioned at described control valve, wherein said sensed system comprises the sequence valve that is communicated with described control valve fluid, and described sensed system also comprises the guiding valve of the form connection that is communicated with fluid between described sequence valve and described control valve, and described guiding valve is to switch between flow locations according to the pressure in first expandable members and second expandable members.

More on the one hand, the invention provides a kind of in underground position the method for pumping well fluid, described method comprises: a pair of expandable members is configured in a pair of pump chamber; The outlet of well fluid entrance and well fluid is positioned to each pump chamber of described a pair of pump chamber is communicated with; For each pump chamber, by making working fluid to-and-fro motion between described a pair of expandable members the suction of well fluid and the discharge of well fluid are replaced; The movement of control valve control working fluid between expandable members that use can switched between the flow locations; With the input signal based on the sensed system of the upstream side that is positioned at described control valve from relative working fluid mobile, described control valve is repeated to switch between flow locations, wherein said sensed system comprises the sequence valve that is communicated with described control valve fluid, and described sensed system also comprises the guiding valve of the form connection that is communicated with fluid between described sequence valve and described control valve, and described guiding valve is to switch between flow locations according to the pressure in first expandable members and second expandable members.

Description of drawings

Describe embodiments more of the present invention below with reference to accompanying drawing, wherein identical reference mark is represented components identical, and:

Fig. 1 is according to one embodiment of the invention, is configured in the front view of the pumping system in the well;

Fig. 2 is according to one embodiment of the invention, the cross-sectional view of the pump embodiment that can use with pumping system illustrated in fig. 1;

Fig. 3 be with Fig. 2 in similar, but show figure according to the pump of the different serviceability of being in of one embodiment of the invention;

Fig. 4 is according to one embodiment of the invention, at the enlarged view of the part of pump illustrated in fig. 3;

Fig. 5 be with Fig. 2 in similar, but show figure according to the pump of the different serviceability of being in of one embodiment of the invention;

Fig. 6 is the enlarged view in the part of pump illustrated in fig. 5 according to one embodiment of the invention;

Fig. 7 is schematically illustrating according to the pumping system of one embodiment of the invention;

Fig. 8 is schematically illustrating according to the pumping system of another embodiment of the invention;

Fig. 9 is schematically illustrating according to the pumping system of another embodiment of the invention;

Figure 10 is schematically illustrating according to the pump assembly layout of one embodiment of the invention;

Figure 11 is schematically illustrating according to the pump assembly layout of another embodiment of the invention;

Figure 12 is schematically illustrating according to the pump assembly layout of another embodiment of the invention;

Figure 13 is schematically illustrating according to the pump assembly layout of another embodiment of the invention;

Figure 14 is schematically illustrating according to the pumping system of another embodiment of the invention;

Figure 15 is schematically illustrating according to the pumping system of another embodiment of the invention;

Figure 16 is schematically illustrating according to the pumping system of another embodiment of the invention;

Figure 17 is the figure according to the pump with continuous chamber of septum of one embodiment of the invention;

Figure 18 is schematically illustrating according to the pumping system of another embodiment of the invention;

Figure 19 is schematically illustrating according to the pumping system of another embodiment of the invention;

Figure 20 is schematically illustrating according to the pumping system of another embodiment of the invention;

Figure 21 is schematically illustrating according to the pumping system of another embodiment of the invention;

Figure 22 is with respect to the chart of the pressure of time drafting, and the reciprocating order phenomenon that according to one embodiment of the invention sequence valve is activated to control the working fluid in the pumping system is described;

Figure 23 is according to one embodiment of the invention, has the figure of the pump of continuous chamber of septum and reference cell;

Figure 24 is schematically illustrating according to the pumping system of another embodiment of the invention;

Figure 25 is schematically illustrating according to the pumping system of another embodiment of the invention;

Figure 26 is according to one embodiment of the invention, uses the front view of the pump of overrun coupling;

Figure 27 is according to another embodiment of the invention, uses the schematically illustrating an of part of pumping system of the sequence valve of guiding operation;

Figure 28 is according to another embodiment of the invention, uses the schematically illustrating an of part of the pumping system of direct acting sequence valve;

Figure 29 is according to one embodiment of the invention, has the cross-sectional view of the control valve of guaranteeing the spring mechanism that fully switch of control valve between operating position;

Figure 30 is according to one embodiment of the invention, the right-angle view of the volute spring that the spring mechanism that can illustrate in Figure 29 uses;

Figure 31 is the chart of the volute spring elastic force relative displacement of a pair of volute spring, and described volute spring has the conventional design of the volute spring that illustrates in Figure 30;

Figure 32 is according to another embodiment of the invention, has the cross-sectional view of the control valve of guaranteeing the spring mechanism that fully switch of control valve between operating position;

Figure 33 is according to another embodiment of the invention, has the cross-sectional view of the control valve of guaranteeing the spring mechanism that fully switch of control valve between operating position;

Figure 34 is schematically illustrating according to the pumping system of another embodiment of the invention;

Figure 35 is schematically illustrating according to the pumping system of another embodiment of the invention; With

Figure 36 is schematically illustrating according to the pumping system of another embodiment of the invention.

Embodiment

In the following description, many details have been set forth so that understanding of the present invention to be provided.Yet it should be understood by one skilled in the art that not to have putting into practice the present invention under the situation of these details, and many variations of described embodiment or revise and can allow.

In this specification and appended claim book: use that term " is connected (connect) ", " connecting (connection) ", " (connected) of connection ", " with ... .. connects " and " being connected (connecting) " expression " with ... .. directly connects " or " by another element and ... connection ".As used in this, use in this manual term "up" and "down", " top " and " bottom ", " making progress " and " downwards ", " upstream " and " downstream ", " top " and " following " and be illustrated in the point of appointment or above the element or other same term of following relative position more clearly to describe embodiments more of the present invention.Yet when apparatus and method that the well that is used in deflection or level uses, these terms can refer to left-to-right, right-to-left or other relation that is fit to.And, in Shuo Ming all embodiments, can use " dynamic sealing " replacement " barrier film " (for example, as used in chamber and reference cell) here.

The present invention relates generally to pumping system, as use fluid to be moved to the pumping system of the position that needs in underground environment.Pumping system uses a plurality of expandable members, and described member expands successively and shrinks to discharge and suck the fluid that needs successively.For example, pumping system can be configured in the well to produce one or more specific reservoir fluids.Because expandable member is pucker ﹠ bloat successively, so well fluid is inhaled in the pumping system, discharge then, namely be pumped into the assembling position that needs from pumping system.

With reference to figure 1, the well system 50 that comprises pumping system 52 has been described generally, described pumping system 52 is in the completion form that is configured to use in the well 54 with well 56.Well 56 can be lined with the well bore casing 58 with perforation 60, and by described perforation 60, well fluid for example oil enters well 56 from stratum 62 on every side.Pumping system 52 is configured in the well 56 below the well head 64, and described well head 64 is arranged on surface location 66, as the face of land or ground, seabed.

In the present embodiment, pumping system 52 is positioned at the inside of well bore casing 58, and comprises configuration-system 68, as pipe-line system and a plurality of well completion assemblies 70.For example, pumping system 52 can comprise pumping installations 72 and one or more packets 74 so that well 56 is divided into different zones.This specific embodiments has illustrated that using pumping installations 72 to produce well fluid makes progress by pipe-line system 68 to for example bleeding point of surface location 66 that is positioned at that needs.

With reference to figure 2, an example of pumping installations 72 has been described according to one embodiment of the invention generally.Use and be pumped fluids such as oils or water supply energy in 72 pairs of wells 56 of pumping installations.Pumping installations 72 comprises to have and is selected so that the pump casing 74 of the diameter that disposes in well.Pump casing 74 has encapsulated a plurality of pump chambers that form therein, as pump chamber 76 and 78.With limit corresponding be used for holding the working fluid seed cell (sub-chamber) 84,86 of working fluid 88 and be pumped

fluid seed cell

90,92 mode is placed in a plurality of

expandable members

80,82 in the pump chamber 74,76.One type expandable members 80, the 82nd, the flexible partition that when being full of working fluid 88, expanding and when discharging working fluid 88, shrink.Should be noted that can be with pump chamber and/or expandable members to merge in this design than illustrated two bigger quantity.

Pump casing 74 also comprises at least one fluid input, and as

fluid input

94,96, described fluid input is used for being pumped fluid, and namely well fluid is directed to the

seed cell

90,92 that is pumped fluid from well 56.

Safety check

98 and 100 is used for guaranteeing that fluid unidirectionally flows to the seed cell that is pumped fluid from well.Pump casing 74 also comprises at least one fluid output, and as fluid output 102, the fluid that is pumped that will be provided with energy by described fluid output is directed to for example for delivery of the pipe-line system 68 to assembling position from being pumped fluid seed cell 90,92.By corresponding safety check, as safety check 104, the one or more outlets 102 of 106 protections, described safety check guarantees that fluid unidirectionally flows to suitable fluid delivery mechanism from being pumped the fluid seed cell, for example in the pipe-line system 68.

Pumping installations 72 also comprises working fluid hydraulic pressure net 108, and described working fluid hydraulic pressure net 108 holds the working fluid 88 of fixed volume, and is provided at the conduit that transports working fluid between working fluid seed cell 84 and 86.Working fluid 88 can comprise various types of fluids, comprises mineral oil, artificial oil, perfluorinate liquid, water base lubricant, oil lubricant, water-diol mixture will, organic oil and other fluid that is fit to.Control valve 110 is provided to control flowing of working fluid, and can activate between operating position.For example, control valve 110 can be arranged on primary importance, wherein with working fluid 88 84 guiding and entering the working fluid seed cell 86 so that expandable members 82 expands from the working fluid seed cell.When making working fluid 88 to-and-fro motion, control valve 110 is actuated to the second place, wherein with working fluid 88 86 guiding and entering the working fluid seed cell 84 so that expandable members 80 expands from the working fluid seed cell.Actuator (as being described in greater detail below) switching control valve 110 back and forth between first and second operating positions is provided.Use prime mover 112 to drive working fluid pump 114, working fluid pump 114 makes working fluid 88 move via hydraulic pressure net 108.Can in pump-unit shell 74, hold prime mover 112 and pump 114.In addition, can be with various forms, for example electric motor, oil hydraulic motor, mechanically actuated motor, air motor or other are used for energy is supplied to the mechanism that is fit to of working fluid pump 114, make up prime mover 112.Road as known to persons of ordinary skill in the art can be with power line such as electric wire or the hydraulic line of power by being fit to, and transports and be supplied to prime mover along configuration-system 68.Therefore, pumping system comprises working fluid net and the crew-served fluid network of holding that is pumped.

The operation of an embodiment of pumping system and pumping installations 72 can be described with reference to figure 3-6.As in Fig. 3, illustrating, operation prime mover 112 is with driven pump 114, described pump 114 is removing working fluid so that other expandable members from working fluid seed cell 86, when for example barrier film 82 shrinks, make working fluid move in the working fluid seed cell 84 so that for example barrier film 80 expansions of expandable members.This effect causes well fluid to be pumped in the fluid seed cell 92 along with expandable members 82 contractions are inhaled into by fluid input 96 (referring to Fig. 4).Simultaneously, the expansion of expandable members 80 is given any well fluid in being pumped fluid seed cell 90 with energy, and well fluid is provided with energy effectively or by exporting 102 well fluid pumping from be pumped fluid seed cell 90 is come out.

When making expandable members 80 be expanded to predetermined level, actuator is urged to the second place with the direction of switching via the working fluid 88 of hydraulic pressure net 108 pumpings with control valve 10, thereby makes working fluid to-and-fro motion effectively.In this second kind of situation, pump 114 is pumped to working fluid in the working fluid seed cell 86 so that expandable members 82 expands, and simultaneously working fluid is discharged from working fluid seed cell 84 so that expandable members 80 contractions.This to-and-fro motion of working fluid causes well fluid to be pumped in the fluid seed cell 90 along with expandable members 80 contractions are inhaled into by fluid input 94.Simultaneously, the expansion of expandable members 82 is given any well fluid in being pumped fluid seed cell 92 with energy, thereby by exporting 102 well fluid pumping from be pumped fluid seed cell 92 is come out.

In the embodiment of Fig. 7, the part of completion pumping system 52 has been described.The present embodiment is designed to utilize the pressure reduction that produces between the well fluid of working fluid 88 and production to change the state/position of control valve 110.

Pump chamber

76 and 78 has

corresponding reference cell

116 and 118, and described

reference cell

116 and 118 pressure (or pipe-line system pressure) with the well fluid that is pumped pass to corresponding sequence valve 120 and 122.When at working fluid pressure be pumped when sensing predetermined pressure difference between the well fluid pressure, sequence valve starts with switching control valve 110.In the present embodiment, control valve 110 can be in the form of guiding valve.When the working fluid in specific working

fluid seed cell

84 or 86 makes membrane becomes expanded to predetermined point, anyly make great efforts further to cause faster that pressure increases what this made membrane becomes expanded, namely during pressure peak (pressure spike), the pressure reduction generation.Respond to the quick increase of this pressure reduction by corresponding sequence valve, described sequence valve guiding control valve 110 switching operation states.Working fluid is directed away from the barrier film of expansion then, and for example barrier film 80, and the barrier film of guiding contraction, and for example barrier film 82.Should be noted that the pump 114 of giving an example is to drive by the launch device 112 that is fit to, even this launch device is not used for describing the present embodiment for example or other embodiment described here also is like this.

By via the actual switching that realizes control valve 110 at sequence valve 120 and the 122 selectivity applied pressures of two guiding ports 124 of control valve 110 and 126.In the present embodiment, by orifice 128 guiding

port

124 and 126 is linked together, and by corresponding safety check 130,132 pressure that alleviate at these ports, described safety check 130,132 will port separately be connected on separately the barrier film 80,82.In addition, working fluid underground 108 can also comprise the suitable valve with chokes function 134,136, and described valve 134,136 is designed to alleviate the accumulation of pressure that the leakage by sequence valve causes, thereby avoids the too early switching of control valve 110.Alternatively or in addition, control valve 110 can comprise and guarantees the spring assembly 138 that fully switch of control valve between operating position.As an example, spring assembly 138 can comprise the detent pin with suitable recess, and described recess is positioned to interact with spring loaded ball, and described ball remains on control valve 110 position that it needs when switching.

Working fluid underground 108 can also use further feature as described.For example, can stride across filter 140 is connected to working fluid pump 114 on the control valve 110.In addition, can stride across filter 140 and connect bypass resistance 142 the flowing with protection working fluid under the situation of plugged filter with safety check 144.Safety check 144 keeps initiatively cutting out in the operating process of rule, but when the accumulation of pressure that is caused by plugged filter, safety check 144 is opened the alternative flow process along bypass resistance 142.And, can stride across pump 114 and connect reduction valve 146 to prevent that under the situation of the fault that limits flow circuits or obstruction locking system suffers unsuitable accumulation of pressure.

Another embodiment of pumping system 52 has been described in Fig. 8.In the present embodiment, control valve 110 comprises rotary valve 148, and these rotary valve 148 to-and-fro motion namely alternately guide working fluid 88 flowing between the working fluid seed cell 86 of the working fluid seed cell 84 of expandable members 80 and expandable members 82.Rotary valve 148 comprise the guiding working fluid towards the working fluid seed cell the 84 one group of port one that flows 50 and guiding working fluid towards the working fluid seed cell 86 another group port ones 52 that flow.Although can use various rotary valves, example is by biting the valve of the motor drive shaft rotation of closing downwards, described motor drive shaft when valve rotates with specific one group of port, 150 or 152, align with working fluid hydraulic pressure net 108.The flow direction of the rotation switch operating fluid of valve.In the present embodiment, switching or the to-and-fro motion of flowing at the working fluid between the barrier film 80 and 82 for example are the functions of motor drive shaft rotation, and are not that sensor or sequence valve by near the differential pressure monitoring barrier film drives.For example, can design system make that in once complete valve rotary course, each barrier film is finished a circulation that is full of and shrinks.Yet sequence valve 154,156 can be arranged in working fluid hydraulic pressure net 108 to be used as the mechanism of decompressor of system under the situation that comprises the operational issue that intermittently starts.For example, if when pumping system begins, working fluid is directed in the expandable members 80, but expandable members 80 has been complete expansion or almost has been complete expansion, and when reaching predetermined pressure threshold, corresponding sequence valve 154 establishes bypass for expandable members effectively so.

With reference to figure 9, another embodiment of completion pumping system 52 has been described.In the present embodiment, pilot valve 158 is connected on the control valve 110.Pilot valve 158 is rotary valves, and control valve 110 is the guiding valves as the two condition control valve, and described two condition control valve is used for guiding working fluid flowing between the working fluid seed cell 86 of the working fluid seed cell 84 of expandable members 80 and expandable members 82.As described, pilot valve 158 can be activated to control and to be applied to the actuating of control valve on the control valve 110 by the guide pressure that pump 114 provides.Therefore, rotary valve 158 is as the mechanism of the switching of control main control valve 110.

As explanation among Figure 10-13, can realize the use of the rotary valve of actual submerged type pumping installations 72 with the form of various structures.For example, pumping installations assembly and the

barrier film

80,82 that is connected on the rotary valve 160 can be settled successively, described rotary valve 160 is connected on the gearbox 162.As in Figure 10, illustrating, gearbox 162 can be connected on the oil hydraulic pump 114, then be connected on prime mover 112 of motor form.In the present embodiment, motor 112 is provided with power for inner oil hydraulic pump 114 and rotary valve 160, yet, reduce the rotating speed that is applied on the rotary valve by gearbox 162.Rotary valve 160 is as the control valve that flows of periodic inversion working fluid, thereby makes

barrier film

80,82 expansion and shrink to-and-fro motion.

In Figure 11, an alternate embodiment has been described, wherein oil hydraulic motor 164 is between the oil hydraulic pump 114 of gearbox 162 and inside.Can use oil hydraulic motor 164 reverse to make rotary valve 160 rotations produce the mobile periodicity of working fluid by gearbox 162.In another embodiment, as in Figure 12, illustrating, can oil hydraulic pump 114 be arranged on the end opposite of motor 112 with respect to gearbox 162.In the present embodiment, motor 112 is given inner oil hydraulic pump 114 and is provided with power at the gearbox 162 of its end opposite.As describing with reference to figure 9 before, another kind of structure uses rotary valve 166 as the pilot valve that is connected to guiding valve 168.A physical implementation scheme of this structure has been described in Figure 13, and wherein guiding valve 168 is between internal hydraulic pressure pump 114 and barrier film 80,82.As described, motor 112 is positioned at the opposite side of oil hydraulic pump 114 and guiding valve 168, and the back is gearbox 162 and rotary valve 166.As pass through motor 112 driving rotary valves 166 via gearbox 162, drive oil hydraulic pumps 114 by motor 112.

With reference to Figure 14, another embodiment of pumping system 52 has been described generally.In the present embodiment, control valve 110 comprises solenoid-actuated control valve 170, and it alternately guides working fluid flowing between the working fluid seed cell 86 of the working fluid seed cell 84 of expandable members 80 and expandable members 82.When the working fluid with prearranging quatity is pumped into an expandable members, in the time of for example in the barrier film 80 or 82, working fluid mobile is to switch or reciprocating.Therefore, when each expandable members is full of, the volume of the working fluid that measurement or tracking (track) are pumped.According to a kind of method, inferred the volume of the working fluid in the expandable members that is pumped into appointment by the revolution of the motor 112 that drives internal pump 114.Can follow the tracks of the rotation of motors 112 by counter mechanism 172, the rotation counting that described counter mechanism 172 is used for motor, thus will drive the rotation counting of the motor drive shaft of internal hydraulic pressure pump 114.In case reach predetermined revolution, just by counter mechanism 172 electrical signal outputed in the solenoid-actuated control valve 170.Electrical signal is solenoid-actuated, and the position of switching control valve is with the flow direction of switch operating fluid between expandable members 80 and 82 correspondingly.

An example of counter mechanism 172 comprises power frequency timer 174.Power frequency timer 174 uses the frequency of electric power, and described electric power is provided at the rotating speed of determining motor 112, thereby is provided with power in the rotation of definite oil hydraulic pump 114 motor 112.When pump 114 is for example during positive-displacement pump, power frequency can be converted into the working fluid flow velocity.Use the known volume of expandable members, barrier film volume for example can determine to be full of time of expandable members.At the end of this time, send electrical signal to solenoid-actuated control valve 170.Electrical signal causes actuating and the switching of consequential working fluid flow direction from a barrier film to another of control valve.

Can also prevent that barrier film is by for example intermittently starting the overexpansion that causes with being designed in embodiment illustrated in fig. 14.

Sequence valve

154 and 156 can be to alleviate unsuitable pressure between aforesaid expandable members and control valve.Be higher than selected pressure threshold if expandable members is pressurized to, then corresponding sequence valve activates and the bypass of flowing of working fluid is provided.

With reference to Figure 15, another embodiment of pumping system completion 52 has been described generally.The present embodiment is very similar with the embodiment that Figure 14 is described, yet counter mechanism 172 comprises Hall effect transducer 176, and this Hall effect transducer 176 is positioned to the rotation that monitoring is connected to motor 112 on the axle 178 on the pump 114.Hall effect transducer 176 outputs to signal in the controller 180, and described controller 180 will drive the rotation counting of the axle of oil hydraulic pump 114.Can utilize described revolution to determine to be pumped into by pump 114 volume of the working fluid in the expandable members of appointment.For example, if pump 114 comprises positive-displacement pump, then determine easily the volume for the working fluid of each rotation institute pumping, the volume that therefore is full of the required working fluid of the expandable members of appointment can be interrelated with specific axle revolution.When reaching specific axle revolution, controller 180 is exported to solenoid-actuated control valve 170 so that control valve is activated with electrical signal, and the direction that flows of switch operating fluid.Should be noted that the sensor that can also use other type is with the shaft counter number.

In another embodiment illustrated in fig. 16, counter mechanism 172 comprises alternator 182 or other power generating device.In addition, counter mechanism 172 comprises power frequency counter 184.Alternator 182 is installed on the axle 178, and motor 112 drives oil hydraulic pump 114 by this axle 178.Can be interrelated with the speed of axle 178 by the power frequency that alternator 182 produces, and the rotation of axle 178 can be interrelated with the volume of the working fluid that passes through internal pump 114 pumpings.Therefore, can calculate and be full of each inflatable device 80, cycle of 82, and can utilize this cycle will be roughly regularly electrical signal offer solenoid-actuated control valve 170.As mentioned above, electrical signal activates control valve, and the flow direction of working fluid is switched to another expandable members from an expandable members.

In Figure 17 and 18, another embodiment of pumping system 52 has been described.In the present embodiment, by in working

fluid seed cell

84,86 and compensation discharge the pressure reduction that produces between the chamber 186 control valve 110 activated.Utilize pressure reduction control working fluid flowing back and forth between the working fluid seed cell 86 of the working fluid seed cell 84 of expandable members 80 and expandable members 82.With reference to Figure 17, an example of the arrangement of components of the present embodiment has been described, wherein prime mover 112, and the electric motor that for example connects (surfaceconnection) reception electric power from the face of land is provided with power for oil hydraulic pump 114.Oil hydraulic pump 114 flows hydraulic pressure and waterpower and offers

barrier film

80 and 82, and Hydraulic Conirol Unit 188 comprises for the control working fluid and flows into

barrier film

80 and 82 and the underground of outflow therefrom.In first half pumping circulation roughly, barrier film 80 is full of, and barrier film 82 emptyings, and in second half pumping circulation roughly, barrier film 82 is full of, and barrier film 80 emptyings.

As illustrating in Figure 18, design work fluid is again pressed net 108 to make and by filter 140 oil hydraulic pump 114 is connected on the control valve 110.In the present embodiment, control valve 110 comprises guiding valve.In addition, can stride across internal pump 114 and connect reduction valve 146 with protective system under the situation of the fault that limits flow circuits or obstruction.In addition, can stride across that filter cell 140 connects safety check 144 in case locking system suffers the unsuitable accumulation of pressure that caused by for example obstruction of filter 140.

By guiding valve 110 switch operating fluid 88 between barrier film 80 and 82.In this example, guiding valve 110 all has stable equilibrium position so that the minimizing possibility of uncontrolled actuating on each flow direction.As use the embodiment illustrated in fig. 7, by the position of guiding

port

124 and 126 control slide valve type control valves 110, and pass through the pressure that

sequence valve

120 and 122 is controlled guiding ports.In addition, by orifice 128 guiding

port

124 and 126 is linked together.Can alleviate pressure at guiding port by being connected respectively to safety check 130,132 on the

expandable members

80,82.

Similar with previous embodiments, by

safety check

98 and 100

expandable members

80,82 is exposed in the well fluid in the well on every side 56.In the contraction process of expandable members, suck fluid, and in the inflation process of expandable members, by corresponding safety check 104,106 it is pumped in the pipe-line system 68.Safety check 104,106 also is used for stoping any reverse flow that is pumped fluid.

Yet, in the present embodiment, utilize the differential pressure that acts on the sequence valve 120,122 that control valve 110 is activated.Sequence valve 120,122 each comprise import 188, order mouthfuls 190 and exhaust port 192.When the import 188 of named order valve and the pressure reduction between the exhaust port 192 surpass predefined force value, allow the connection between import 188 and order mouthfuls 190.In the embodiment of explanation, sequence valve 120,122 import 188 are connected on their

expandable members

80,82 separately.By orifice or choke elements 194 exhaust port 192 is connected to and discharges on the chamber 186, described discharge chamber 186 has and is adjusted to the discharge chamber pressure that approaches with pump discharge head.Orifice or choke elements 194 can be connected on the either side of filter 140.And, by spring slide-back device 196 with the inlet pressure of the pressure compensation in discharging chamber 186 to pump 114.Compensator 196 is as the storage of the fluid of discharging from the named order valve in the operating process of specific sequence valve.

The alternative embodiment of using compensation apparatus has been described in Figure 19-21.For example, as illustrating among Figure 19, replace using the discharge chamber 186 with spring slide-back device 196 to allow the discharge currents from sequence valve, can use to have pipe-line system pressure compensator 200, for example the compensation of compensator piston discharge chamber 198 holds discharge currents.Make pipe-line system pressure compensator 200 be exposed to the pressure that is pumped well fluid in pipe-line system 68.As illustrating in Figure 20, this system can also utilize the compensation with annular pressure compensator 204 to discharge chamber 202.Make annular pressure compensator 204 be exposed to sleeve ring around pipe-line system 68 in the pressure of well fluid under.Such annular pressure compensator can also comprise spring element as spring slide-back device.As illustrating in Figure 21, another embodiment uses the compensation of the compensator 208 with sealing to discharge chamber 206.In the present embodiment, by the compensator 208 of sealing, for example piston compensates the working fluid pressure in chamber 206 is discharged in compensation to charging into gas (gas charge), for example charges into nitrogen (nitrogen charge).In the chamber 210 by compensator 208 sealings, hold and charge into gas.

Discharge in the operation of pumping system embodiment of chamber at using compensation, during the beginning pumping circulation, discharge chamber pressure and follow expandable members pressure tightly, for example barrier film pressure.Determine barrier film pressure and discharge being communicated with of chamber by choke 194.As in Figure 22, illustrating, when membrane becomes expanded and with on every side element as around locular wall produce when contact, barrier film pressure is with bigger speed increase.Yet orifice or choke elements 194 are sizeable, make as by mark 212 explanations on the chart of Figure 22, under the situation that does not have significant pressure drop or hysteresis, advance the speed to follow this bigger pressure towards the insufficient flow of orifice.Therefore, between barrier film pressure and discharge chamber pressure, produce pressure reduction.When this pressure reduction increased enough amounts, corresponding sequence valve 120 or 122 was switched, and control valve 110 is braked effectively to its another kind of serviceability.Certainly, this makes the flow direction of working fluid reverse, makes to begin to be full of another barrier film.Being full of in the process of a back barrier film, discharge chamber pressure and can equate basically with the inner septum pressure of the barrier film that is filled again, make and can repeat this process to another sequence valve.The use that the chamber is discharged in compensation effectively utilizes the restriction that working fluid is flowed and is created in the direction that working fluid is flowed and switches to the time-dependent model pressure reduction that uses another expandable members from an expandable members.

Should be noted that in some embodiments, select by design or the material of expandable members, can cause pressure peak and consequential differential pressure.For example, can use harder material to form barrier film.Finally, the operation of such system is based on produce advancing the speed of pressure increase in expandable members.Because for example by contacting with on every side assembly, the speed that pressure increases is before expandable members reaches its limit and different greatly afterwards, so system can accurately respond to being full of of expandable members.

In another embodiment of pumping system 52, as explanation in Figure 23 and 24, by working

fluid seed cell

84,86 and reference cell between the pressure reduction that produces control valve 110 is activated.With reference to Figure 23, an example of the arrangement of components of the present embodiment has been described, wherein prime mover 112 is provided with power for oil hydraulic pump 114.Oil hydraulic pump 114 flows hydraulic pressure and waterpower and offers

barrier film

80 and 82 and the underground of outflow therefrom.In addition, with respect to oil hydraulic pump 114, reference cell 214 is configured in

barrier film

80,82 end opposite.In the present embodiment, Hydraulic Conirol Unit 188 comprises the underground that changes for by reference cell 214 induction pipe system pressures, and described reference cell 214 is exposed to being pumped in the fluid in production pipe-line system 68.

Figure 24 has illustrated an example of underground, by means of described underground, by working

fluid seed cell

84,86 and reference cell 214 between produce pressure reduction, control valve 110 is activated.Design work fluid is in addition pressed net 108 to make and by filter 140 oil hydraulic pump 114 is connected on the control valve 110.And, can stride across internal pump 114 and connect reduction valve 146 with protective system under the situation of the fault that limits flow circuits or obstruction.And, can stride across that filter cell 140 connects safety check 144 in case locking system suffers the unsuitable accumulation of pressure that caused by for example obstruction of filter 140.

By control valve 110, guiding valve for example, the switch operating fluid flows between expandable members 80 and 82.In this example, control valve 110 all has stable equilibrium position so that the minimizing possibility of uncontrolled actuating on each flow direction.As using the embodiment illustrated in fig. 7, by the position of guiding

port

124 and 126 control slide valve type control valves 110, and the pressure by

sequence valve

120 and 122 control guiding ports.In addition, by orifice 128 guiding

port

124 and 126 is linked together.Can by respectively operatively (operatively) be connected to safety check 130,132 on the

expandable members

80,82 and alleviate pressure at guiding port.

Similar with previous embodiments, by

safety check

98 and 100

expandable members

Yet, in the present embodiment, sequence valve 120,122 import 188 are connected on their the corresponding expandable members 80,82.Exhaust port 192 is connected on the sub-barrier film (sub-diaphragm) 216 in the reference cell 214.Reference cell 214 is subdivided into the working fluid seed cell 218 in sub-barrier film 216 and is pumped fluid chamber 220, and the described fluid chamber 220 that is pumped is in the outside of sub-barrier film 216, and is exposed to being pumped in the fluid from pipe-line system 68.By being connected orifice or the choke elements 222 between sub-barrier film 216 and the pump 114, the reference cell pressure in sub-barrier film 216 is adjusted near pump discharge head.Because in the operation cycle process, pump discharge head is near pipe-line system pressure, i.e. pressure in pipe-line system 68 is so in the operating process of rule, the pressure reduction that produces in reference cell 214 is minimum.In addition, orifice or choke elements 222 can be connected on the either side of filter cell 140.

When

expandable members

80,82 reached their full state, the internal pressure in the expandable members that is full of increased sharply, and surpassed the pipe-line system pressure that acts on the sub-barrier film 216.Therefore, produce the pressure reduction that strides across corresponding

sequence valve

120 or 122, and the transfer sequence valve.The switching of sequence valve causes the corresponding actuating of control valve 110, thereby control valve is switched to another kind of serviceability so that the flow inversion of working fluid, and makes the filling to-and-fro motion of expandable members.

Some embodiments of pumping system 52 comprise the reversal protection system.These protective systems are designed to prevent that hydraulic system from suffering casual flow inversion.Usually, the mobile of hydraulic work fluid is in one direction.If flow direction is inadvertently reverse, then the hydraulic pressure logic may be unsuitable in some embodiments.Casual when reverse when taking place, a barrier film may be full of fully, and transmits signal with switching control valve.Yet, because flow inversion is inadvertently reverse, attempt control valve is switched to its current state so send the switching signal of the guiding port of control valve to, rather than opposite state.Continue then working fluid is supplied to same barrier film.Working fluid produces infringement potentially to the lasting supply of the barrier film that is full of, and comprises that barrier film or diaphragm casing break, motor case or thrust-bearing infringement, internal pump infringement, motor overburdening and/or other mechanical failure.Because for example incorrect or inadvertently put upside down possibility as the phase relationship of the three-phase motor of launch device, there is the possibility that " oppositely " of hydraulic pressure net operate.When changing phase relationship, can make the flow direction of internal pump, thereby cause described counter current state.

An embodiment of reverse flow protective system 224 has been described in Figure 25.Reverse flow protective system 224 comprises gravity flow (free-flowing) safety check 226 that flows, and described safety check 226 hydraulic types are connected between the discharge side 230 of the suction side 228 of positive-displacement pump 114 and pump 114.Free-flow safety check 226 can be connected in the working fluid hydraulic pressure net 108 in filter 140 1 sides opposite with discharging side 230 and flow through filter with the working fluid that allows recycled back.Alternatively, safety check 226 can be connected on the discharge side 30 of internal pump 114, described pump 114 establishes the position of bypass for system filtration device 140.

When the stream of working fluid moved (for example, at the three-phase motor 112 of " forward " direction operation driving internal pump 114) in " forward " direction, safety check 226 remained on the position of cutting out.Yet, when the stream of working fluid exists " on the contrary " direction mobile (for example, at the three-phase motor 112 of " on the contrary " direction operation driving internal pump 114), force safety check 226 to the free-flow of opening (free-flow) position.This position produces the suction side 228 of pump 114 internally to the free flow process of discharging side 230, thus the barrier film of anti-locking system and/or the over-pressurization of other assembly.Reverse flow protective system 224 can be operated pumping system considerable time under the situation that does not produce infringement in the opposite direction.

The operator can easily determine the generation of reverse operating by various indexs.For example, in the reverse operating process, because working fluid is by safety check 226 and be not full of pumping

barrier film

80,82, so non-productive well runoff yield body.Another index can be to draw (draw) by the low current of the three-phase motor 112 of driven pump 114.When pump 114 comprises positive-displacement pump, proportional with the differential pressure that produces by pump 114 by the electric current that motor is drawn.In reverse operating, there is the minimum limit by free-flow safety check 226, therefore the differential pressure that produces by pump 114 is low.The result draws with the electric current in normal operating process forward to compare, and the electric current when being in the reverse operating in system is drawn lower.In addition, because system does not have " constructing pressure head (build head) ", otherwise this will be constant relatively so electric current is drawn owing to the static pressure that increases when upwards producing fluid by pipe-line system 68 takes place.Because do not produce current peak, otherwise this will produce owing to the switching of directional control valve, also keeps constant so electric current is drawn.

Another embodiment of reverse flow protective system 224 has been described in Figure 26.In the present embodiment, settle " overrun coupling " or the axle of clutch 232 replacements between motor 112 and pump 114.As an example, motor 112 can comprise three-phase motor, and pump 114 can comprise positive-displacement pump.Overrun coupling 232 is delivered to pump 114 with whole torques from motor 112 on forward direction, and transmits minimum torque in the opposite direction.In other words, when operating motor 112 in the opposite direction, overrun coupling " (slip) slides ".The torque that passes to pump 114 by motor 112 should be enough low in the opposite direction, makes pump 114 can not make

barrier film

80,82 or other system component over-pressurization.Such reverse flow protective system also allows system is operated considerable time in the opposite direction, and does not damage system.During this period, the operator can be by observing the state of determining reverse operating as mentioned above.

Many embodiments described here comprise that sequence valve is to offer input signal directional control valve 110.In Figure 27, used mark 120 marks and guided an example of the sequence valve of operation, and be illustrated.As described, import 188 is communicated with expandable members such as barrier film 80 fluids.Order mouthfuls 190 is communicated with selectivity actuator control valve with directional control valve 110 fluids, and exhaust port 192 and the reference pressure source that is arranged in reference cell such as sub-barrier film or control room barrier film 216 fluids are communicated with.In the present embodiment, the sequence valve 120 of guiding operation comprises shell 236, has the dynamic seal (packing) piston of installing slidably 238 in the shell 236.Dynamic seal (packing) piston 238 has orifice 240, and by spring component 242 bias voltages with obstruction order mouth 190.In addition, the fluid that is blocked between orifice 240 and the barrier film 216 by the spring bias ball 244 with respect to corresponding base 246 bias voltages flows.

When the pressure in barrier film 80 rose to the pressure that is higher than in the control room barrier film 216, ball 244 departed from base 246, and caused flowing to the control room barrier film.When increasing sharply along with the pressure in barrier film 80, ball and base valve are opened, and further allow other the flowing by the orifice 240 of dynamic base 238.At last, as by the valve constitution of opening as shown in the frame of broken lines of Figure 27 explanation, the pressure drop that produces by the restrictions of flowing via orifice 240 has overcome the power of spring 242, thereby causes dynamic seal (packing) piston 238 to slide at flow direction.This mobile opening sequence mouth 190, and allow the fluid of supercharging to flow in the guiding port that is fit on the directional control valve 110, thus switching control valve.

Sequence valve 120, alternative embodiment of 122 have been described in Figure 28.This improved embodiment of sequence valve allows from pumping system dismounting control room barrier film, and can be called as direct acting sequence valve.When using direct acting sequence valve to replace the sequence valve of guiding stream activation, by the dynamic sealing in each direct acting sequence valve well fluid and hydraulic work fluid are isolated mutually.Because dynamically base is isolated well fluid and working fluid, so need not the control room barrier film.This can reduce the complexity of design, eliminates and makes the risk of control room membrane ruptures, and response faster is provided potentially, thereby be reduced in the pressure peak that produces when

expandable members

80,82 reaches its expansion limit.

An example of direct acting sequence valve 120 has been described in Figure 28.As described, import 188 is communicated with expandable members such as barrier film 80 fluids.Order mouthfuls 190 is communicated with consequently brake control valve with directional control valve 110 fluids, and exhaust port 192 is exposed under the wellbore fluid and pressure in the pipe-line system 68 for example.In the present embodiment, direct acting sequence valve 120 comprises the shell 248 with dynamic sealing element 250 as slidably piston that sealing is installed in shell 248.Dynamic sealing element 250 is as acting on the working fluid on port one 88 and 190 and acting on interface between the well fluid on the exhaust port 192.The adjustable springs member 252 of pressure by the opposing working fluid makes dynamic sealing element 250 biasings.

When the pressure in barrier film 80 with when acting on differential pressure between the pressure of the well fluid on the exhaust port 192 and rising to the setting value that is higher than adjustable spring component 252, move dynamic sealing element 250 with respect to spring component 252.The opening of the direct control sequence mouth 190 of this movement of dynamic sealing element 250 and closing subsequently.The fluid of opening the permission supercharging of order mouth 190 flow to the guiding port that is fit on the directional control valve 110, thus switching control valve.An example of the direct acting sequence valve 120 that is in the open position that switches directional control valve 110 has been described in the frame of broken lines of Figure 28.

In at least some embodiments, pumping system 52 can be designed to have the mechanism of switching fully be used to guaranteeing control valve 110.As mentioned above, control valve 110 can comprise directional control valve, and described directional control valve has and determine to flow into

expandable members

80,82 and two kinds of serviceability of the direction that therefrom flows out.The design of some directional control valves also has the position that the third moment closes effectively.When it switches between serviceability, the position that directional control valve cut out through this moment.If for example in the startup of pumping system or close in the closed procedure, control valve switches between state, then directional control valve can be parked in the position that this moment closes.Yet, can add mechanism such as spring assembly in the control valve so that position instability that moment closes.In other words, described mechanism guarantees control valve is switched to a kind of of its serviceability.

With reference to Figure 29 and 30, an embodiment of the mechanism 254 of switching fully that is used for guaranteeing control valve 110 has been described generally.In the present embodiment, control valve 110 comprises the slide valve type control valve with valve body 256 and reciprocating piston 258, and described reciprocating piston 258 is slidably mounted within the valve body 256 with mobile between two kinds of serviceability.Mechanism 254 comprises the spring assembly 260 that is connected between reciprocating piston 258 and the valve body 256.Be applied to power on the reciprocating piston according to the change in location of reciprocating piston by spring assembly 260, but spring assembly 260 guarantees that the position that control valve 110 was closed in moment is unsettled.Spring assembly 260 is designed to show the behavior of " snap switch (snap through) ".An instantiation of spring assembly 260 comprises one or more volute springs 262 (referring to Figure 30).When volute spring in the moving process of reciprocating piston 258 262 is compressed when surpassing flat form, the direction that is applied to the power on the reciprocating piston by volute spring is reverse rapidly, and forces control valve to cross the position that moment closes to reach a kind of serviceability down.

In other embodiments, spring assembly 260 can comprise a plurality of volute springs 262.For example, can be with parallel, the fovea superior that namely piles up to recessed form is piled up the group of two volute springs to obtain the strength function with respect to the displacement symmetry.The chart of Figure 31 has illustrated the first volute spring dish (referring to curve 264), the volute spring power of the second volute spring dish (referring to curve 266) and function and the cone shaped spring power sum of two dishes (referring to curve 268) and the function of displacement of displacement with schematic form.The force characteristic of the configuration of two volute springs is created in the unstable equilibrium of the position that moment of directional control valve closes.As by the caption among Figure 31, the direction of the power that applies by volute spring changes at the mid point of displacement.

Another embodiment of mechanism 254 has been described in Figure 32.In the present embodiment, one or more connecting rod 270 is connected between reciprocating piston 258 and the valve body 256.By pivot 272 each root connecting rod 270 pivoting is connected on the reciprocating piston 258.In the end opposite of each root connecting rod 270, by pivot 276 the connecting rod gudgeon formula is connected on the piston component 274.Each piston component 274 is contained in the corresponding cylinder 278 slidably, and setovers towards reciprocating piston 258 by spring component 280.Spring component 280 by connecting rod 270 effects is given the reciprocating piston 258 that power is given directed control valve.The vertical component of this power changes with the functional form of the displacement of reciprocating piston 258.At the mobile mid point of reciprocating piston, the direction of vertical force component is reverse, thereby produces unsettled position.Therefore, this embodiment of mechanism 254 is also guaranteed the switching fully of control valve 110.Alternatively, each root connecting rod 270 can be by the material with elasticity or plastic property, and for example the plastic memory material is made, and makes to omit independently spring component 280.In other alternate embodiment, connecting rod 270 can be formed by submitting to property (compliant) material, and follows closely or be rigidly connected on reciprocating piston 258 and the valve body 256.

As in Figure 33, illustrating, be used for guaranteeing that the mechanism 254 of switching fully of control valve 110 can also comprise magnetic mechanism.In the present embodiment, so that the unsettled mode in position that moment closes is settled magnet and metallic member.For example, permanent magnet 282 can be connected on the reciprocating piston 258, and metallic member 284 can be placed in the position that it closes by moment the time from the end opposite of the permanent magnet 282 of permanent magnet distance about equally.Permanent magnet 282 is connected to the more close place of metallic member, thereby makes the position instability that moment closes.Permanent magnet 282 and corresponding metallic member 284 can also be connected on other assembly of control valve 110 to produce identical unstable position.

In another embodiment of pumping system completion 52, as illustrating in Figure 34, control valve 110 comprises electromechanical actuator 286.In the present embodiment, directional control valve 110 is the two condition main valves with shuttle 288, and described shuttle 288 moves around to guide from pump 114 to

expandable members

80 and 82 stream and from the stream of expandable members 80 and 82.By being designed to the similar electromechanical actuator that works 286 of solenoid shuttle 288 to be moved around.

Electromechanical actuator 286 moves shuttle 288 based on the electrical signal that receives from the control gear 290 that is fit to.For example, control gear 290 can comprise at pump 114, prime mover 112 or the vicinity axle between pump 114 and prime mover 112 with the device with the pump shaft rotation counting.As previously mentioned, the pump shaft rotation can be interrelated as the required volume pumped of barrier film with the expandable members 80 that is full of appointment.When by control gear 290 during with predetermined revolution counter, electrical signal is sent in the electromechanical actuator 286 with mobile shuttle 288, thereby control valve 110 is switched to another kind of state.Control gear 290 can be that for example frequency sensor, hall effect sensor, alternator maybe can be used for determining the device of other type of the volume of the working fluid that is pumped.

In Figure 35, another embodiment of pumping system 52 has been described.In the present embodiment, will discharge chamber system and the reverse flow protective system combination as describing with reference to Figure 25 generality as the compensation that reference Figure 21 generality is described.In addition, by filter cell 140 oil hydraulic pump 114 is connected to for example guiding valve of control valve 110, and reduction valve 146 is connected between pump discharge side 230 and the pump suction side 228 with protective system under the situation of restriction flow circuits.And, can stride across filter 140 and connect safety check 144 with protective system under the situation of plugged filter.

Provide the reverse flow protection by striding across the safety check 226 that pump is taken in or suction side 228 is connected with outlet side of pump 230.In the operating process of rule, use by pump 114 and the pressure reduction that produces by optional biasing spring to force safety check 226 to the position of closing.Yet, under the situation of the counterrotating of pump, open safety check 226 so that bypass to be provided in the high pressure of pump suction side 228.This bypass makes the pump short circuit effectively, and does not damage whole pumping system 52, so when correcting the direction of pump rotation, the normal running that can recover pumping system.

In the present embodiment, between

expandable members

80 and 82, switch mobile by control valve 110.As mentioned above, control valve 110 can comprise guiding valve, and described guiding valve is designed to have stable equilibrium position so that the minimizing possibility of uncontrolled actuating at each flow direction.The pressure that is applied on guiding

port

124 and 126 by selectivity activates control valve 110, and controls the pressure of guiding ports by sequence valve 120 and 122.By orifice element 128 guiding port is linked together, and alleviate pressure at guiding port by each port being connected to

safety check

130 and 132 on the corresponding expandable members.

As some argumentations to above-mentioned embodiment, according to the operate

sequence valve

120 and 122 of differential pressure.When the import 188 of named order valve and the pressure reduction between the exhaust port 192 surpass predetermined force value, between import 188 and order mouthfuls 190, can be communicated with.In the pumping system that in Figure 35, illustrates, each import 188 is connected on its corresponding expandable members, and two exhaust ports 192 all are connected on the compensation discharge chamber 206.When the named order valve is opened, be about to small volume of fluid and be discharged in its exhaust port 192.

Be adjusted to the head pressure of pump 114 working fluid pressure in chamber 206 is discharged in compensation approaching by orifice element 194.Orifice element 194 can be connected on the either side of filter 140, and obtains comparable performance.In this specific embodiments, will compensate the pressure compensations of discharging in the chamber 206 by piston compensated device 208 and give the gas that charges in the chamber 210, for example charge into nitrogen.Compare with incoercible hydraulic work fluid, the compressible nitrogen gas pressure that charges in chamber 210 is far insensitive to Volume Changes.Therefore, when the named order valve is opened, be contained in compensation from its hydraulic fluid of exhaust port 192 and discharge in the chamber 206, and do not have tangible pressure to increase.

As reference Figure 22 description, the use of discharging chamber 206 is created in compensation and discharges the working fluid in the chamber 206 and compensating the position of discharging outdoor, for example the time-dependent model pressure reduction between the working fluid in the circuit of the barrier film supercharging that makes expansion.Effectively, the pressure in barrier film and working fluid supply circuit thereof increases with the bigger speed of pressure of discharging than compensation in the chamber 206, thereby is created in the import 188 of corresponding sequence valve and the pressure reduction between the exhaust port 192.When this pressure reduction increased enough amounts, corresponding sequence valve was switched, and control valve 110 is actuated to its another kind of serviceability.

In another embodiment of pumping system 52, underground 108 comprises and is positioned at directional valve, i.e. the sensed system of the upstream of control valve 110.As illustrating in Figure 36, working fluid 88 is mobile relatively, and sensed system 300 is positioned at the upstream of control valve 110.When

expandable members

80,82 one or another are full of its corresponding chamber, thereby during the working fluid pressure that causes increasing, the variation of sensed system 300 testing hydrodynamic pressures.Sensed system 300 works by the input signal switching control valve 110 that is fit to that is input to guiding port 124 or guiding port 126.

In the present embodiment, as using the embodiment of describing with reference to Figure 17, pumping system 52 can comprise the prime mover 112 that is provided with power to hydraulic pressure working fluid pump 114, for example electric motor.Use pump 114 that working fluid stream is fed to

expandable members

80 and 82, and the hydraulic pressure net 108 control working fluids that are arranged in the Hydraulic Conirol Unit 188 pass in and out alternately flowing of expandable members 80 and 82.Usually, when expandable members 82 emptyings, expandable members 80 is full of in first half pumping circulation; And when expandable members 80 emptyings, expandable members 82 is full of in second half pumping circulation.Can also in making up pumping system 52, use other assembly or other arrangement of components.

As in Figure 36, illustrating, in addition can the design work fluid press net 108 to make and by filter 140 working fluid pump 114 is connected on the control valve 110.In the present embodiment, control valve 110 can be built into the guiding valve that can switch between flow locations in addition, for example the two-stage guiding valve.Stride across pump 114 and connect reduction valve 146 with protective system under the situation of the fault that limits flow circuits or obstruction.Can also stride across filter cell 140 and connect safety check 144 when for example filter 140 stops up, to prevent that locking system suffers accumulation of pressure.Usually safety check 144 cuts out, but safety check opens to produce alternative path when enough accumulation of pressure.

With the class of operation of above-mentioned several embodiments seemingly, make working fluid 88 to-and-fro motion between

expandable members

80 and 82 by the control valve 110 that can be in the guiding valve form.Guiding valve can be built at each flow direction and have stable equilibrium position so that the minimizing possibility of uncontrolled actuating.Carry out control to slide valve type control valve 110 by being applied to pressure on guiding port 124 and 126.As use the above-mentioned embodiment,

safety check

98 and 100 can be configured in

expandable members

80,82 and well 56 in well fluid between.Safety check 104,106 can be configured in expandable members and for example being pumped between the well fluid in the pipe-line system 68.When producing well fluid, safety check 98,100,104 and 106 promotes

expandable members

80,82 pump action.

This embodiment of pumping system 52 can also comprise the reverse flow protective system 224 of using safety check 226, and described safety check 226 strides across working fluid pump 114 and is connected between its suction side 228 and its discharge side 230.In the operation of rule, use pressure reduction and optional biasing spring to force safety check 226 to be in the position of closing.Yet, under the situation of the counterrotating of pump 114, open safety check 226 in the high pressure of the suction port of pump 114.The bypass path that produces prevents systemic-function, makes pump 114 short circuit effectively.When correcting the direction of pump rotation, pumping system 52 can recover the operation of rule.

In the embodiment that illustrates in Figure 36, upstream sensed system 300 comprises sequence valve 302 and guiding valve 304, and the relative working fluid 88 of both passes the mobile upstream side that is positioned at control valve 110 of control valve 110.Sequence valve 302 comprises the import 306 on the pressure port 308 that is connected to hydraulic pressure net 108, and described hydraulic pressure net 108 is arranged between control valve 110 and the filter 140 (as illustrating at Figure 36) or between filter 140 and pump 114.Sequence valve 302 also comprises to be connected to discharges the exhaust port 310 on the chamber 312 and is connected to order mouth 314 on the guiding valve 304.

By Flow restrictor or the choke elements 316 that is fit to, as orifice, be adjusted to the head pressure of pump 114 approaching with discharging chamber pressure.Limiter 316 typically is arranged in hydraulic pressure net 108, in a side identical with the pressure port 308 of filter 140.This has been avoided the unfavorable pressure reduction that may be caused by plugged filter.Yet limiter 316 can be positioned at the end opposite of filter 140.Can will discharge pressure compensation in the chamber 312 to the pressure at the pressurized gas 318 of the end opposite of piston 320, described piston 320 sealably is installed in discharges in the chamber 312.Compensation is discharged the chamber and is used as in the operating process of sequence valve from the storage of the working fluid of sequence valve 302 discharges.Use charges into gas and reduces the effective bulk modulus of discharging the chamber, yet, can realize identical effect by other mechanism.

When pumping circulation begins and expandable members 80 when being full of working fluid, by passing the connection that Flow restrictor 316 is set up, the pressure in discharging chamber 312 is closely followed at expandable members 80 pressure in the barrier film 80 for example.When expandable members 80 contacted the element of chambers 76 on every side, the pressure in expandable members 80 increased with bigger speed with the head pressure of working fluid pump 114.Flow restrictor 316 is sizeable, makes to pass flowing of Flow restrictor 316, for example passes the insufficient flow of orifice there not to be following bigger advancing the speed under the situation of significant pressure drop.(referring to the caption in Figure 22).Confined head pressure and the pressure reduction between the pressure of discharging chamber 312 that flows and be created in pump 114.Described differential pressure action makes the pressure of working fluid by the order mouth 314 of sequence valve 302 and by guiding valve 304 on sequence valve 302 and cause the sequence control of sequence valve 302.The pressure input signal is by the guiding port that be fit to of guiding valve 304 to control valve 110, and switching control valve 110 is to cause for example filling of expandable members 82 of other expandable members.In expandable members 80,82 stowing operation, allow the charging fluid in discharging chamber 312 to ooze out until pressure near pump discharge head.When sensed system 300 receives the pressure input signal that is fit to, repeating switching control valve 110, make working fluid between expandable members, circulate back and forth.

Use the guiding

port

124 or 126 of guiding valve 304 control control valves 110, described guiding

port

124 or 126 is exposed in the supercharging working fluid by sequence valve 302.This guarantees that correctly switching control valve 110 is to allow the to-and-fro motion that continue of working fluid between

expandable members

80 and 82.

As described, guiding valve 304 is connected in series with sequence valve 302, and comprises guiding port 322 and 324, and described guiding port 322 and 324 can be based on the pressure change-over pilot valve 304 between different flow locations that is applied on guiding port 322 or the guiding port 324.In the pumping operation process, under high pipe-line system pressure, and expandable members empty or emptying is under lower casing pressure at expandable members that its ambient indoor is filled.Each guiding port of guiding valve 304 is connected respectively on the corresponding expandable members.For example, in the embodiment of explanation, be connected guiding port 322 with the form with the connection of expandable members 82 fluids, and be connected guiding port 324 with the form with the connection of expandable members 80 fluids.Therefore, when being full of each expandable members, guiding valve 304 is switched to predetermined fluid flow structure.For example, being full of of expandable members 80 switches to a kind of fluid flow structure as described with guiding valve 304, and being full of of expandable members 82 switches to second kind of fluid flow structure with guiding valve 304.When order of occurrence control activity, i.e. during the sequence control of sequence valve 302, the position of guiding valve 304 determines to make which guiding port supercharging of control valve 110.As the result of the supercharging of guiding port 124 or guiding port 126, switching control valve 110, and make expandable members 80,82 filling reverse.Thisly then oppositely cause guiding valve 304 to switch getting back to its opposite state to prepare circulation next time.

Limiter 326 for example orifice can be between guiding port 322,324 one and its corresponding expandable members 82,80.Alternatively, limiter 326 can connect respectively guiding

port

322 and 324 and their corresponding

expandable members

82 and 80 between.One or more limiters 326 with the response time delay of guiding valve 304 to the level that needs.Use some system's design, the action of guiding valve can be faster than needed, therefore can use one or more limiters 326 to make the action of guiding valve slack-off.

In the embodiment of explanation, by guiding valve 304 and safety check 328 will be in switching circulation the guiding port of unpressurized control valve 110 place with among the fluid of the suction side 228 of pump 114 is communicated with.For example, if make guiding port 124 superchargings with switching control valve 110, guiding port 126 is communicated with pump suction side 228 fluid/pressure via guiding valve 304 and safety check 328 so.Safety check 328 prevents guiding port effectively, and for example guiding port 126 meets with contingent suction pressure dynamics in the handoff procedure of control valve 110.

Can use secondary sequence valve 330 to be used for the pressure that restriction

expandable members

80,82 bears.Usually secondary sequence valve 330 is set in the threshold pressure differential higher than one-level sequence valve 302.Secondary sequence valve 330 comprises import 332, and described import 332 is communicated with the output fluid of working fluid pump 114 via filter 140 or is communicated with the direct fluid of the output of pump 114.Secondary sequence valve 330 also comprises the exhaust port 334 that is communicated with discharge chamber 312 fluids and the order mouth 336 that is communicated with suction side 228 fluids of working fluid pump 114.(perhaps come self-pumping 114 if pass filter 140, if with the direct-connected words of the output of pump 114) head pressure surpass by discharging chamber 312 applied pressures, the difference of pressure is greater than setting pressure, and then secondary sequence valve 330 opens to allow to pass order mouthful 336 flow.Therefore, in for example system starts and in the system exception that may produce owing to the unfavorable response from system component, secondary sequence valve 330 protection hydraulic pressure net 108 and whole pumping systems.

Above-mentioned embodiment provide have uniqueness, the effectively and reliable example of the submersible pumping system of design, it is used for using in the various pumpings of the pumping that comprises hydrocarbon-based fluids and uses.Should be noted that and difference configuration and dissimilar assemblies can be merged in the submersible pumping system.For example, can dissimilar expandable members and valve be used for various pumping system structures according to the particular type of the application that designs pumping system according to this.

Therefore, although only describe several embodiments of the present invention in the above in detail, those of ordinary skills should understand easily, do not depart from itself under the situation of instruction of the present invention, and many modifications are fine.These modifications are intended to be contained in as in the scope of the invention defined in claims.

Claims

1. the system of a pumping fluid in well, described system comprises:

Pump casing with fluid input and fluid output, described pump casing has a pair of chamber;

A pair of expandable members is wherein with in one in the described expandable members each chamber that is configured in described a pair of chamber;

Working fluid; With

Hydraulic control system, it controls the to-and-fro motion of described working fluid from an expandable members to another expandable members, the pucker ﹠ bloat successively of the described expandable members that produces sucks well fluid in the chamber, from another chamber, discharge well fluid simultaneously, described to-and-fro motion is controlled by control valve, described control valve is by having guiding valve and having and the sensed system of the sequence valve that guiding valve is connected in series switches between flow locations, wherein said guiding valve also connects with the form that fluid between described sequence valve and described control valve is communicated with, and described guiding valve is to switch between flow locations according to the pressure in described a pair of expandable members.

Claim 1 described in well the system of pumping fluid, flowing of described relatively working fluid wherein, described sequence valve is positioned at the upstream of described control valve.

Claim 1 described in well the system of pumping fluid, wherein each expandable members comprises barrier film.

Claim 1 described in well the system of pumping fluid, wherein said control valve comprises the two-stage guiding valve.

Claim 1 described in well the system of pumping fluid, also comprise working fluid pump and secondary sequence valve in order to mobile described working fluid, described secondary sequence valve has import on the discharge side that is connected to described working fluid pump, be connected to the order mouth on the inlet side of described working fluid pump and be connected to the exhaust port of discharging on the chamber.

As claimed in claim 1 in well the system of pumping fluid, also comprise the reversal protection system.

As claimed in claim 1 in well the system of pumping fluid, wherein said guiding valve comprises first guiding port that is communicated with a fluid of described expandable members and second guiding port that is communicated with another fluid of described expandable members.

8. the pump of a mobile well fluid, described pump comprises:

Pump casing with the outlet of well fluid entrance and well fluid;

First Room that has first expandable members therein;

Second Room that has second expandable members therein;

Working fluid, described working fluid are isolated with to-and-fro motion between first expandable members and second expandable members; With

Control system with control valve, described control valve is allowing described working fluid switching successively between the reciprocating position between first expandable members and second expandable members, the sequentially-operating of described control valve is to be controlled by the sensed system of the upstream that is positioned at described control valve

Wherein said sensed system comprises the sequence valve that is communicated with described control valve fluid, and

Described sensed system also comprises the guiding valve of the form connection that is communicated with fluid between described sequence valve and described control valve, and described guiding valve is to switch between flow locations according to the pressure in first expandable members and second expandable members.

9. pump as claimed in claim 8, wherein said control valve is the dibit guiding valve with the guiding port that is connected on the described guiding valve.

10. pump as claimed in claim 9, also comprise working fluid pump and secondary sequence valve in order to mobile described working fluid, described secondary sequence valve has import on the discharge side that is connected to described working fluid pump, be connected to the order mouth on the inlet side of described working fluid pump and be connected to the exhaust port of discharging on the chamber.

11. pump as claimed in claim 8, wherein first expandable members comprises first inflatable membrane that is arranged in first Room, and second expandable members comprises second inflatable membrane that is arranged in second Room.

12. pump as claimed in claim 8 also comprises the other expandable members that is contained in the other chamber.

13. the method for a pumping well fluid in underground position, described method comprises:

A pair of expandable members is configured in a pair of pump chamber;

The outlet of well fluid entrance and well fluid is positioned to each pump chamber of described a pair of pump chamber is communicated with;

For each pump chamber, by making working fluid to-and-fro motion between described a pair of expandable members the suction of well fluid and the discharge of well fluid are replaced;

The movement of control valve control working fluid between expandable members that use can switched between the flow locations; With

Input signal based on the sensed system of the upstream side that is positioned at described control valve from relative working fluid mobile repeats described control valve to switch between flow locations,

14. method as claimed in claim 13 is wherein controlled the movement that the described control valve that comprises use two-stage guiding valve form is controlled described working fluid.

15. method as claimed in claim 14 wherein repeats switching and comprises that second guiding valve is switched the working fluid selectivity to be directed to the specific guiding port of described two-stage guiding valve from providing input signal with crew-served second guiding valve of sequence valve.

16. method as claimed in claim 15, also comprising connects Flow restrictor with described sequence valve settles to allow the sequence control of described sequence valve when working fluid pressure increases because of the filling of of described expandable members or another.

17. method as claimed in claim 16 comprises that also location second sequence valve is to limit the pressure maximum that described a pair of expandable members is born.

18. method as claimed in claim 16, comprise that also location second guiding valve makes a pair of guiding port of second guiding valve be communicated with described a pair of expandable members fluid, thereby the working fluid pressure increase time causes the switching of second guiding valve in the stowing operation of each expandable members.

19. method as claimed in claim 18 also comprises at least one Flow restrictor is positioned between at least one guiding port and at least one expandable members of second guiding valve.

20. method as claimed in claim 15, wherein configuration comprises a pair of barrier film of configuration.