CN1040273C - Method for controlling a linear D.C. motor of downhole motor-pump - Google Patents

Abstract

The present invention relates to a control system for monitoring underground linear DC power pump devices and a method for lifting well liquid to the ground through underground production pipes by utilizing the control system to generate reciprocating pumping motion. The system comprises a monitoring station on the ground, which is used for radio communication with a plurality of distant underground power pump devices. Each of the power pump devices is provided with a motor controller on the ground and an underground power pump sleeve barrel component which is installed in an underground barrel sleeve device to be positioned in a stable position for pumping, wherein the component can be lifted in a pipe through a control cable, which is favorable for maintenance or replacement. The power pump device also comprises a plurality of sensors which is used for monitoring underground conditions and the efficiency of the power pump sleeve barrel component.

Description

The method of the DC linear electric motor of power pump at the bottom of the control well

The present invention relates to a kind of oil well liquid and carry pumping system to ground surface with the shaft bottom.Especially, the present invention relates to a kind of control system of the straight line direct current motor pump-unit that is used for the shaft bottom and adopt this device to produce the reciprocating method of pump piston.

The pump control system that is used for the shaft bottom of many different models and type and the reciprocating method of leaning on the piston pump of driven by motor with their control are arranged.

The conventional pumps control system relevant with the present invention and the motor pump-unit of common model are to be used for oil well liquid is carried to ground from the shaft bottom.Conventional, known motor pump-unit generally includes an electric drive motor, and motor is connected between the control system on a shaft bottom pump and well surface with a connecting rod.

Such system should be successful in many application, but proves that they are not too satisfactory when being used for reaching reluctantly the commodity production well of productive value.In this respect, owing to the liquid that produces in the well reduces in time, not impossible even the performance of adjusting the shaft bottom motor pump-unit with the cost effective and efficient manner makes it to adapt to the well working condition proof of variation, also be difficult.In addition, if connecting rod damages or fault is pumped in the shaft bottom, long connecting rod and pump then must adopt mechanical means to take out repairing from well, adopt mechanical means to fall in the well then.About this point, the repeated multiple times piston rod will damage the production pipeline and therefore need take out and change during pump work.

Therefore, new and an improved pump control system need be arranged very, and using method to be will carrying to ground at the oil well liquid in shaft bottom, thereby to have solved the problem relevant basically with existed system.Especially, this system needn't take out and change the long-term job stopper rod, and can eliminate and produce the danger that pipeline damages.

Another problem of following conventional motor pump-unit relevant with the present invention is the downtime of the well when pumping fault for.In this respect, pump is taken out repairing from well, very time-consuming, expensive.

Attempt solution for one that is devoted to that prior art is concerned about and see United States Patent (USP) 4,350,478, it discloses a shaft bottom straight line motor pump-unit, and this device is to drop in the well liquid with a downhole cable.The practice although it is so attempts to solve the problem of low producing well, but this method it is can not to be proved to be satisfied fully, because such device can not fully suitably support in the shaft bottom with oil pumping effectively.

About this point, for producing a sufficient swabbing action, motor pump-unit needs a fulcrum or suitable connector to link on the surrounding structure, brings into play its actuating force thereon.

Yet, being starved of a motor pump-unit, it can easily rise or put down in the production pipeline of well, and produces sufficient swabbing action so that the well liquid in shaft bottom is carried to the well face with effective aspiration rate.

Another problem relevant with the shaft bottom motor pump-unit is and controls the relevant problem of linear DC motor in the shaft bottom.Especially, the armature of linear dc motion actuator must pump, so that with effective and efficient manner driving pump piston.Thereby linear electric motors need a series of discrete coils, and they are actuated to produce required actuating force in order.For the rectilinear motion of sequencing suitably and control stator, motor control signal must be sent to the shaft bottom with the required high voltage pulse of drive motors.Such high and low voltage signal combination is in a long cable, owing to the signal interference or because the loss of control signal (this is because the characteristic impedance of so long cable produces), motor at the bottom of the control well if not impossible words, also is difficult from the ground.

Therefore, be starved of a new improved pump motor control system and the method for using it, control and adjust the performance and the pump rate of shaft bottom linear electric motors with cheap cost and reliable mode.Also have, such Electric Machine Control should be adjustable, with the pump rate of compensation owing to FIH supply minimizing.

Ask that another problem of relevant prior art is to send high-level engineers and technicians to check the ruuning situation and the efficient of each shaft bottom motor pump-unit to the oil well building site during with shutdown.About this point, known existing watch-dog only can monitor some variable, thereby is impossible fully to the concrete identification of some fault.Therefore, need expensive, overhaul service to be determining and to change pump and the motor that goes wrong widely, and usually is determined the maintenance service that needs before needed for repair and replacement repeatedly at an equipment that really goes wrong.Such device is very expensive.

Prior art also has another problem to be and repairs or change shaft bottom motor pump-unit cost related problem.About this point, because motor pump-unit is a monolithic construction, not impossible even only repair or change motor with low-cost and effective and efficient manner, also be difficult.

Therefore, very a kind of motor pump-unit need be arranged, it has monolithic construction and helps when being out of order or only repair or change motor, perhaps only repairs or change pump.

Therefore, be starved of a new and improved control system that is used for shaft bottom pump and linear dc motion actuator, it can monitor the ruuning situation and the efficient of motor pump-unit in the shaft bottom with low-cost and simple and effective way.

Thereby main purpose of the present invention provides a kind of new improved control system that is used for shaft bottom straight line direct current motor pump-unit and produces the method for efficient reciprocating motion with suction well liquid with this device.

Another object of the present invention provides a kind of so new and improved control system, is used for a shaft bottom straight line direct current motor pump-unit, and this control system can make efficiency of motor be adjusted at the downhole condition that changes at an easy rate.

The present invention also has another purpose to provide a kind of new improved control system, is used for a shaft bottom straight line direct current motor pump-unit, it can be low-cost and the simple and effective way monitor well at the bottom of the operation and the efficient of motor pump-unit.

The present invention has a purpose to provide a kind of new improved motor pump-unit again, and it can produce a sufficient swabbing action so that shaft bottom liquid is carried to the well surface, and regains from the shaft bottom easily to repair or to replace.

Briefly, above the present invention and further purpose by provide a kind of new, improved control system with monitor and control well at the bottom of the operation of straight line direct current motor pump-unit, and method by adopting this system with produce one fully back and forth suction movement well liquid carried by the production pipeline of well realized to ground.This system comprises a ground monitoring station, and it and a plurality of remote shaft bottom motor pump-unit carry out radio communication and get in touch.Each motor pump-unit has a well surface motor controller, shaft bottom power pump sleeve part and shaft bottom jacket casing device (it be suitable for holding with the maintainance set cartridge unit a stable position so that aspirate).For convenient repairing or replacing power pump sleeve part, the power pump sleeve part can promote in producing pipeline or decline with a control cable.Motor pump-unit comprises that also a plurality of transducers are with the condition in monitoring shaft bottom and the efficient of power pump sleeve part.

Connection with figures, with reference to following description about the embodiment of the invention, above-mentioned and other purpose and feature of the present invention and realize that their mode will become clearly, wherein:

Fig. 1 is the sectional view that includes the well of the motor-driven pump sleeve parts of shaft bottom straight line direct current; Fig. 2 a is the profile that amplify the part at the top of a ducted power pump sleeve part of production that is configured in Fig. 1, and 2-2 along the line basically cuts open;

Fig. 2 b is the local amplification profile of bottom of the power pump sleeve part of a Fig. 1, section 2-2 direction along the line basically;

Fig. 3 is the profile of linear dc motion actuator armature connecting rod, and piston pump is shown in Fig. 2 b, and 3-3 along the line cuts open;

Fig. 4 be Fig. 2 a sleeve part linear dc motion actuator oil pressure compensator amplification cutaway view, section is the functional-block diagram that is configured in the shaft bottom motor control component in the power pump sleeve part of Fig. 1 along 4-4 direction: Fig. 5;

Fig. 6 is the functional-block diagram of a control system that is used for the motor-driven pumping system of shaft bottom straight line direct current of Fig. 2; With

Fig. 7 is the functional-block diagram of the well surface motor controller of Fig. 1, has represented its interlock circuit.

Now referring to accompanying drawing, especially accompanying drawing 1, wherein represented a pump control system 9, is used for a shaft bottom straight line direct current motor pump-unit 10, and it is made according to the present invention.

Pump control system 9 generally comprises a well surface monitoring station 11, and it is by radio communication and a plurality of shaft bottom straight line direct current motor pump-units (as motor pump-unit 10) contact.Each shaft bottom straight line direct current motor pump-unit (as installing 10) comprises a shaft bottom power pump sleeve part 13, from a conventional oil well 15, to pump well liquid 17, with an electric machine controller 12, it has a well surface motor pulse control unit 500 and a shaft bottom Electric Machine Control electronic unit 600, with the operation of power pump sleeve part 13 at the bottom of the control well.In order to make well liquid 17 be transferred to ground 18, oil well 15 comprises a sleeve pipe 15A and a series of interconnective production pipe or the pipeline 16 that are disposed at wherein.High-visible as Fig. 1,2a and 2b, producing pipeline 16 ends in the shaft bottom jacket casing device 14 in the shaft bottom, device 14 has a sealed base 20, base 20 be suitable for holding in the inside of the hollow of cover 14 and support motor-driven pump sleeve parts 13 in a stable down well placement so that liquid is pumped.About this point, sealed base comprises the hole or the hole 20A of a center configuration, it can make well liquid enter in the power pump sleeve part 13 with the well liquor pump to ground 18.Be configured in the hollow of producing pipeline 16 control cable 19 inner and that be connected in power pump sleeve part 13 and allow power pump sleeve parts 13 in pipeline 16, to promote or descend, with the repairing or the replacing of convenient power pump sleeve part 13.

During operation, power pump sleeve part 13 is transferred by producing pipeline 16 by control cable 19 and is entered in the well 15.Sleeve part 13 is accommodated in the jacket casing device 14, fixed sleeve part 13 removably in the sealed base 20 of device 14 center configuration.About this point, when sleeve part 13 is contained in the inside of jacket casing device 14, cover 14 tight engagement and stop sleeve parts 13.Basically a liquid-tight sealing promptly forms between the base 20 of sleeve part 13 and jacket casing device 14, and this will explain in the back in detail.Yet can understand, the static pressure of liquid 17 helps sleeve part 13 and keeps tight engagement with base 20 in producing pipeline 16.

At this moment power put on the power pump sleeve part 13 with the start liquid swabbing action by control cable 19.About this point, base 20 is as a fulcrum, and liquid can be discharged from motor-driven pump sleeve parts 13 in the well like this, and upwards is pumped in the production pipeline 16 so that transfer to ground.

Refer now to Fig. 1,2a and 2b detailed consideration shaft bottom jacket casing device 14, shaft bottom jacket casing device 14 generally includes the cylindrical jacket 22 and the sealed base 20 of a hollow, to hold from below and to support shaft bottom power pump sleeve part 13.Cover 22 comprises the end or the lower end screw thread part 22A of an annular, and it is suitable for and sealed base 20 screw-threaded engagement.Cover 22 comprises that is also gone up a screw neck part 22B, and it is suitable for and threaded connector 16A screw-threaded engagement, and 16A places well to produce the lower end of pipeline 16, is detachably connected on the production pipeline 16 will overlap 22.

The size of jacket casing device 14 inside should be held power pump sleeve part 13 loosely.One 21 can held by being arranged on perforate 20A on the base 20 by the well liquid 17 of sleeve part 13 suction between the annulus of jacket casing device 14 inwalls.About this point, sleeve part 13 (as mouth 36B and 36C, Fig. 2) is discharged into well liquid 17 in the interval 21, then makes progress by interval 21 and enter and produce pipeline 16, so that liquid transfer is arrived well surface 18 by a series of floss holes.

Refer now to Fig. 2 b detailed consideration base 20, base 20 is formed by a single structure and by suitable production pipeline material usually.Base 20 is normally cylindrical and comprise a threaded neck 59, it end at generally represent by 21A, determined within the projection of a center configuration opening.Neck 59 comprises a series of screw threads 60, base 20 usefulness are threaded onto on the cover 22.

The size of determining perforate 21A makes it can hold bottom or bottom with stop sleeve parts 13 removably, securely.About this point, perforate 21A comprises a bottom opening 20A, it is generally cylindrical and definite its size makes it can sealed engagement and the bottom of stop sleeve parts 13, can avoid well liquid by entering between annulus 21 between their intermeshing surfaces so basically.Perforate 21A also comprises the conical shoulder part of neck 20B, and it radially inwardly draws in the bottom from bottom support sleeve part 13 towards perforate 20A.

Refer now to Fig. 1,2a, 2b, 6 and 7 detailed consideration shaft bottom power pump sleeve parts 13, power pump sleeve part 13 is normally columniform, has a modular structure.Power pump sleeve part 13 comprises a linear dc motion actuator (seeing 26), and it is connected to a piston pump (seeing 28), with the ground of well liquid 17 pumps to well 15 places.

High-visible as Fig. 2 a and 2b, seal member 24 places between linear electric motors 26 and the pump 28 to hold a pump connecting link 27, bar 27 is connected to pump 28 to motor 26, and parts 24 are opened the motor lubricating fluid (not illustrating) of motor 26 and well liquid 17 seal isolation of discharging from pump 28.Seal member 24 comprises the hole of a center configuration or perforate 54 holding the pump connecting link 27 that motor 26 is connected to pump 28, and therefore the driving reciprocating force of motor 26 is passed on the piston pump 28, and this will explain in the back in detail.

For balance places the dynamo oil of motor 26 inside and by the pressure between the liquid of pump 28 discharging, power pump sleeve part 13 also comprises a pressure compensator, its integral body is represented by 80 in Fig. 2 a and 4.In order to limit or eliminate basically seepage and the pollution of dynamo oil by seal member 24, the pressure balance between motor 26 and pump 28 is necessary.Pressure compensator 80 is cylindrical usually, and comprises a threaded neck in upper and lower, sees 33 and 38 respectively, is used for connecting between linear dc motion actuator 26 and motor cable terminal installation (seeing 23) pressure compensator 80.

High-visible as Fig. 2 a, motor/cable termination devices comprises a cable termination (seeing 74), and cable 19 is connected to motor 26, and a series of bottom-hole transmitter 616 to 618 and 621 (Fig. 5), with the efficient and the operation of monitoring shaft bottom situation and motor 26.

Motor/cable termination devices 23 allows sleeve part 13 to draw back or hoist from well 15 by producing pipeline 16, and avoids applying on the electric lead of motor 26 unsuitable stress.As describing in detail later on, control cable 19 comprises that a signal/power concentric conductor is to 525A and 525B, with a pulse power concentric conductor 524A, it provides a suitable pulse current to linear electric motors 26, and provides a transmitted in both directions passage to provide shaft bottom information earthward to motor downhole operation sequencing with for the purpose of safeguarding.

As Fig. 1,2a and 2b are high-visible, and motor cable terminal installation 23, seal member 24, motor 26 and pump 28 have formed modular filter cylinder pump parts 13, can at an easy rate it be disassembled in order to keep in repair purpose.

Refer now to Fig. 2 b detailed consideration piston pump 28, piston pump 28 generally includes a lower bottom base mate (seeing 45), be used for meshing in liquid-tight mode with the sealed base 20 of jacket casing device 14, and comprise a pump barrel (seeing 34), be used for acceptance and pumping well liquid 17 and enter production pipeline 16, this will describe in detail afterwards.Base member 45 comprises a upwardly extending annular neck portion 45A, and it ends at projection 45B, and 45B defines a perforate facing to bottom 45 or chews.Being configured in neck 45A inside a series of screw threads all around is suitable for and barrel 34 screw-threaded engagement.

The bottom 45 of pump 28 also comprises a pair of cannelure 44 and 46, and its size is suitable for holding respectively a metal abaculus seal member 44A and a neoprene pressure sealing component 46A.Seal 44A and 46A are suitable for closely and base 20 engagements, have formed the sealing of a uncomfortable liquid like this between base 20 and bottom 45.About this point, seal 44A and 46A stop the liquid that is emitted in the space 21 to flow back in the well by opening 20A downwards.

Refer now to Fig. 2 a, 2b, 3 detailed consideration pump barrels 34, pump barrel 34 generally includes one and goes up thread neck part 42, pump barrel 34 is threaded onto on the seal member 24 and a following thread neck part 64, so that pump barrel 34 is threadably attached on the bottom 45 of pump 28.Pump barrel 34 also comprises the pump chamber 35 of the elongate hollow of a center configuration, and it is configured between neck 42 and the following neck 64, to accept the well liquid of artesian well 15 respectively.Pump piston 50 is configured in the pump chamber 35, well liquid is aspirated into pump chamber 35 and discharge pump chamber 35.Pump chamber part 35 comprises an import 36A and a series of exhaust outlet 36B and 36C (seeing Fig. 2 b) that radially extends, to import well liquid into interval 21 by chamber 35.Be understood that the well liquid of 21 permissions in the hollow inside of jacket casing device 14 is transferred to the outside of sleeve part 13 by pump between the annulus that forms between barrel 34 and the lauter tub covering device 14, and enter production pipeline 16.

Import 36A in the bottom or bottom 45, and is kept fluid communication with perforate 20A by center configuration, enters in the hollow chamber 35 that is configured in the pump barrel 34 by the well liquid 17 of the perforate 20A import 36A that flows through like this.Outlet, as outlet 36B, the well liquid of permission in pump chamber 35 enters the hollow inside of interval 21 or jacket casing device 14 thus.

Chamber 35 is that integral type forms in pump barrel 34.The upper end of pump chamber 35 axially dwindles to form an annular shoulder 48A gradually facing to center annular perforate 48.The size of perforate 48 should be held piston rod 27 slidably, and bar 27 comprises a bottom 30 (Fig. 3), and piston rod 27 and pump piston 50 are used to be threaded.The end that piston rod is opposite is connected on the piston rod connector 40 to allow pump piston 50 reciprocating motions.

The lower end of pump chamber 35 ends at foot-operated unidirectional valve 37, and valve 37 allows the well liquid to flow up into chamber 35, but stops from the chamber 35 to flow down and flow out.Foot-operated unidirectional valve 37 is arranged between import 36A and the pump chamber 35, and comprises a valve element or valve ball 37A and a cone valve base 37B.

Refer now to Fig. 2 b and 3 detailed consideration pump pistons 50, the stubby object of hollow cylindrical that pump piston 50 normally is connected to piston rod 27 bottoms flows through through it to allow well liquid.Piston 50 comprises the threaded connector 57 of a center configuration, with the bottom 30 usefulness threaded connections that allow piston rod 27 thereon.The bottom 30 of piston rod 27 comprises an axially extended raceway groove or mouth 52, passes through and is discharged on 35 inner carriers 50 of chamber with the liquid of permission in the hollow inside of piston 50.About this point, pump piston 50 comprises the chamber 57 of a center configuration, and it axially phases down towards center annular inlet part 58.The liquid of piston below 50 passes through its inlet chamber 57 in the import permission chambers 35 58, and therefore is discharged into piston more than 50 through raceway groove 52.

In order to pass through flowing of piston 50 control well liquid, a unidirectional valve (seeing 53) is configured between import 58 and the chamber 57.Valve 53 comprises a valve element or valve ball 55 and a cone valve base 54.Unidirectional valve 53 allows well liquid to flow up into chamber 57, but stops the downward and outside liquid stream through it.About this point, when moving up, pump piston 50 make unidirectional valve 53 block imports 58, discharge the main chamber 35 of the well liquid of piston 50 tops from piston 50 like this, and through outlet (as exporting 36B), enter between annulus 21.

Refer now to thread neck part 42 on Fig. 2 detailed consideration, last thread neck part 42 comprises that a series of configurations screw thread 38 on its outer surface is to be threadedly engaged on the threaded connector 39 that is configured in seal member 24 lower ends.The pump barrel sealing gasket 64 that is configured in pump barrel 34 necks 42 outsides cooperates with seal member 24, has formed liquid-tight sealing thereby make when their screw-threaded engagement between sealing gasket 64 and seal member 24.Last thread neck part 42 also comprises the cylindrical groove 43 of the center configuration of a hollow, and it is suitable for holding a piston rod packing hitching post 44 by thread connecting mode, so that linear electric motors 26 and well liquid sealing are separated.The one group of screw thread 49 that is configured on neck 42 inner surfaces allows hitching post 44 to be threadably engaged in the groove 43.The perforate 48 of the center configuration at 35 tops extends into the bottom of groove 43 and is sealed by hitching post 44 from that in the chamber.Determine the size in perforate or hole 48 so that allow piston rod 27 freedom pass through along it.

Piston rod packing hitching post 44 comprises the hole or the eye 46 of a center configuration, and its size also allows piston rod 27 freely to pass through it.The outside of hitching post 44 is threaded with screw thread 49 screw-threaded engagement with the last neck portion 42 of pump barrel 34.In order to prevent that motor 10 lubricating fluids from leaking into pump chamber 35 and in order to prevent that well liquid from entering the pollution seepage of motor 26, sealing hitching post 44 comprises a metal abaculus pressure seal 61, it is kept apart by a metal separator 64 and neoprene packing parts 62.

Refer now to Fig. 1,2a, 2b and 5 detailed consideration linear dc motion actuators 26, linear dc motion actuator 26 is electrically connected on the electric machine controller 12 by Electric Machine Control terminal installation 23, and this is afterwards with detailed consideration.Linear dc motion actuator comprises motor housing parts 25, so that linear dc motion actuator 26 is mechanically connected between seal member 24 and the pressure compensator 80.Motor 26 comprises a stator apparatus (29) and an armature device (30), and they are closed in the case member 25 basically.Magnetic interaction between stator apparatus 29 and the armature device 30 is by motor control component 600 controls, and this is detailed consideration afterwards.

With reference now to Fig. 2 A and 2b detailed consideration case member 25,, case member 25 is a hollow cylindrical tube normally, and it comprises that an internal ring wall part 130 is to limit a hollow chamber 132 that surrounds armature device 30.Pressure compensation oil 134 (Fig. 4) as suitable transformer oil, is placed in the hollow chamber 132 so that the reciprocating motion of armature device in chamber 132.Wall components 130 comprises a upper and lower, and they integrally are connected on the stator 29.About this point, the upper and lower of annular wall 130 is to be made to avoid the interference of the magnetic flux between stator and armature device 30 by nonferrous materials.A ditch (not illustrating) is opened in stator 29 and wall 130, passes through with a series of electric wires that allow to send from motor control component 600.

Shell 25 also comprises a following thread neck part 32 (see among the figure 26), and it has a series of screw threads 33 to be threaded with seal member 24.Under sealing gasket 35 cooperations that place between seal member 24 and the case member 25, between seal member 24 and case member 25, formed a liquid-tight sealing like this, in case crossing the well liquid in sleeve part 13 outsides, fluid stopping enters motor 26.Case member 25 comprises that also one is gone up thread neck part 90 (Fig. 2 a), it has a series of screw threads 91 to be threaded with pressure compensator 80.

Refer now to Fig. 1 and 6 detailed consideration stators 29, stator 29 generally includes the separated coil of a plurality of equidistant accumulations, as coil 612-614.Coil is separated by a plurality of iron type materials sheets, as sheet 632 and 634.The iron type materials sheet helps to concentrate the magnetic flux that comes from each coil and helps directed in the horizontal direction basically its magnetic flux.

On each coil and each iron type materials sheet, have a series of electric wire (612A-Bs of ditch to allow from motor control component 600, to draw, 613A-B, 614A-B, 616A, 617A and 618A) pass through, with the burst transmissions of control coil 612-614 and the position of detection armature device 29B.

Refer now to Fig. 2 a and 5 detailed consideration armature devices 30, armature device 30 comprises an armature 30A, and it is positioned the inside of chamber 132 slidably and is centered on by each coil and iron type materials sheet, as coil 612-614, and sheet 632-634.Armature 30A comprises the separated permanent magnet of a plurality of equidistant accumulations, as magnet 31 (Fig. 5).Determine the position of these magnet (as magnet 31) so that the magnetic field force that (as coil 612-614) acts between coil obtains an equilbrium position.About this point, will explain in detail that afterwards because single coil 612-614 is subjected to electric pulse, it is uneven that magnetic field force becomes, so just produced enough motoricities with mobile armature device 30 inlet chambers 132 slidably.When electric pulse is removed, armature device 30 continues to be driven direction at it and moves, till it reaches a new equilbrium position.The coil of selecting is imposed rightabout field current then produced rightabout actuating force.Being used for the motor 26 of driving pump 28 has so just realized reciprocating motion.

High-visible as Fig. 2, the lower end of armature 30A ends at the lower end of integrally formed threaded piston rod connector 40.Piston rod connector 40 is suitable for threadably holding pump connecting link 27, and the reciprocating motion that is produced by motor 26 is transferred on the piston rod pump 28 like this, and this will explain in the back in detail.

Referring now to Fig. 2 a and 4 detailed consideration Electric Machine Control cable termination devices 23, Electric Machine Control cable termination devices 23 generally includes a hollow basic is the top of taper (seeing 71), enter in the jacket casing device 14 with help guide sleeve parts 13, and the oil that guiding is discharged from pump 28 enters production pipeline 16.Top 71 comprises the threaded skirt section 72 that is generally columniform downward suspension that an integral body connects, and it has a series of screw threads 73 so that Electric Machine Control/cable termination devices 23 is threadedly connected on the pressure compensator 80.

See Fig. 2 and 4, cable termination 74 and shaft bottom motor control component 600 are configured in the hollow inside on top 73 basically fully, and separate by a pressure compensator (80) and linear dc motion actuator 26, pressure compensator helps the dynamic oil pressure between the lubricating oil of liquid that balance aspirates and linear electric motors 26 inside from well, this explains afterwards in detail.Cable termination 74 is connected to cable 19 with sleeve part 13, sleeve part 13 can promote in producing pipeline or put down like this, and 74 link together shaft bottom motor control component 600 and electric lead in the cable 19, to allow from ground motor pulses control device 500 to motor control assembly 600 and the various transducers that are configured in the shaft bottom, as the electrical transmission of transducer 616-618 and 621.

Refer now to Fig. 2 a detailed consideration top 71, top 71 generally includes 4 center vane of radially extending, as blade 75.Each blade has a rectangular basically axially extended back-up ring, as back-up ring 76, is engaged on slidably when branching away from jacket casing device 14 with convenient sleeve part 13 on the inner surface of producing pipeline 16.

In order to allow the inside of well liquid from the production pipeline 16 of interval 21 inflows above the jacket casing device, top 71 also comprises 4 openings or spout hole, and as spout hole 77 and 78, they extend axially, equally separate at interval and are configured between the blade, as blade 75.Each overfall little by little radially inwardly comes to a point to the cable 19 that is configured on the above-mentioned sleeve part 13 from piston skirt 72.

For well liquid and pressure compensator (80) are interacted, piston skirt part 72 comprises a series of imports, and as import 79, its permission well liquid enters the hollow space between cable termination 74 and pressure compensator 80.As later detailed description, pressure compensator 80 has been set up a liquid-tight sealing between cable termination 23 and linear electric motors 26 inside.

Referring now to Fig. 2 a detailed consideration cable termination 74, cable termination 74 comprises a tapered basically guard ring 84, to mesh the guard ring that tightens up on it with the interior tapered shoulder 85 that shrinks from cable perforate 86 outward radials.Cable 19 is connected on the guard ring by the hole 86 and the (not shown) of taking measures of center configuration in top 71.Motor control component 600 directly is configured in the following of guard ring 84 and is supported by it, and the electric lead that is configured in like this between control assembly 600 and the motor 26 is not subjected to stress when sleeve part 13 is raised or transfers in production pipeline 16.

Refer now to Fig. 2 a and 4 detailed consideration oil pressure compensators 80, the oil pressure that oil pressure compensator 80 helps to keep in the motor 26 is higher than the hydraulic pressure that pump 28 produces, and comprise the external pressure compensator tube 472 of a hollow, tube 472 has a threaded top 474 and threaded bottom 476, so that pressure compensator 80 is connected between motor/cable termination devices 70 and the motor housing parts 25, also has a hollow chamber disposed therein 475.Top 474 also is suitable for threadably receiving porose cap 476, is higher than the hydraulic pressure that pump 28 produces with the oil pressure that helps to keep in the motor 26.Porose cap 476 has a perforate 477, allows the fluid communication between the hollow inside of pressure compensator tube 472 inside and motor 26.Compensator tube 472 also comprises a hole or passage 487, is electrically connected on the linear electric motors 26 with the electric lead of permission from motor control component.Cover 488 surrounds lead in hole 487.

The threaded top 474 of pressure compensation tube 472 comprises a flange 478, and when cap 476 threadably was installed in the top 474, flange 478 was suitable for sealing ring 479 of clamping between the inside of tube 472 and porose cap 476.Sealing ring forms a sealing between tube 472 and cap 476, liquid can only enter the inside of tube by perforate 477 like this.The bottom 476 of tube 472 comprises a groove 478, and it is suitable for holding one and keeps circle 480.Keep hole 482 and a wall portion 483 that circle 480 comprises a center arrangement with respect to hole 482 centralized configuration.

A compensating piston 471 is maintained at the hollow inside 475 of tube 472.Piston 471 comprises the groove 473 of a center configuration, and it is suitable for holding the inwall of a pressure seal 475 with engagement bucket 472.Coil spring 485 compensation or tension is configured between the cap 476 and piston 471 of mouth, and piston 471 is applied a constant downward power.About this point, when piston 471 when the hollow internal freedom of tube 472 moves, being limited by cap 476 of piston 471, and its downward path is kept the wall portion 483 of ring 480 and limited to upper pathway.

Tube 472 is threadably connected on the shell 25, and the internal lubrication oil in the motor 26 enters the hollow inside of tube 472 by hole 482 and heads on the bottom of piston 471 like this.Pressure seal 475 prevents that lubricating oil from entering the space of piston more than 471 that disposes spring 485 by the piston discharge.

Referring now to Fig. 4, in when operation, the well liquid applied pressure by perforate 477 produces a downward pressure to piston 471.On the contrary, be upwards to face toward piston 471 by the dynamo oil applied pressure.Spring 485 and the downward force mating reaction that is applied by well liquid can be kept the fluid pressure that pressure in the motor is higher than generation like this.This is represented by following relationship:

Pw=well fluid pressure

The Pc=compensatory pressure

Pm=motor fluid pressure

The K=spring force

X=piston displacement therefore

Pw＝Pc

Pm＝Pw+Kx

Refer now to Fig. 5 and 7 detailed consideration electric machine controllers 12, electric machine controller 12 generally includes the operation with control linear dc motion actuator 26 of well surface motor pulse control unit 500 and shaft bottom Electric Machine Control electronic unit 600.Shaft bottom motor control component 600 is configured in the Electric Machine Control cable termination devices 23 basically so that control cable 19 is connected on the motor 26.Well surface motor pulse control unit 500 and shaft bottom Electric Machine Control electronic unit 600 will be discussed in more detail below.

Refer now to Fig. 7 detailed consideration motor pulses control device 500, motor pulses control device 500 generally includes a motor pulses control assembly 501, to provide a high voltage pulse in the shaft bottom to motor 26, with a communication controller 504, send performance data to the control Surveillance center 11 that is positioned at the center with control motor pulses control assembly 501 and from sleeve part 13.Communication controller 504 determines whether there is malfunction in pulse control assembly 501 or power pump sleeve part 13, and sends performance or fault data by a transceiver 542 to Surveillance center 11.The performance data of Surveillance center's 11 assessment oil wells 15 and shaft bottom power pump sleeve part 13.

For the low voltage signal of the high voltage signal of motor pulses control assembly 501 and communication controller 504 is kept apart, motor pulses control device 500 also comprises the high voltage isolation network 503 that the those skilled in the art of a routine know.

Refer now to Fig. 7 and go through motor pulses control assembly 501, motor pulses control assembly 501 generally includes a high voltage distribution member or circuit 502, be used for and change a High Level DC Voltage into from the alternating current of the appropriate voltage of three core power lines of routine, be used for producing the high voltage pulse of delivering to linear dc motion actuator 26.Motor pulses control assembly 501 also comprises a pulse-generating circuit 505, and it supplies high voltage pulse so that the armature 29A reciprocating motion of linear dc motion actuator 26 in the shaft bottom.High voltage distribution member 502 and pulse-generating circuit 505 will be described in detail later.

Referring now to Fig. 7 detailed consideration high voltage distribution member 502, distribution member 502 is by three core alternating current source supplying energies (not illustrating) of routine and change or rising line voltage makes it to become the high voltage of a suitable DC operation, be approximately 1000 volts of direct currents, be used for pulse-generating circuit 505.Distribution member 502 generally includes the automatically controlled power supply on/off touch switch 506 of a routine, system power supply is switched on or switched off and moment or lightning protection circuit 507.Lightning protection circuit 507 helps avoid, or reduces at least greatly, system failure or even because that different electric conditions are damaged is possible, as lightning-strike or analogue.Distribution member 502 also comprises a power source conversion network 508 with the supply system capacity, and comprises a high-tension transformer 510 and high-voltage rectifier 511 with rising line voltage, a low-tension supply 512 and a voltage regulator 513.

Referring now to the automatically controlled mains switch 506 of Fig. 7 detailed consideration, mains switch 506 can make power connection and the shutoff of supplying with motor pulses control device 500.Mains switch 506 is linked between instantaneous network 507 and the conventional three core power line devices.About this point, mains switch 506 comprises a series of input T ₁, T ₂And T ₃, they are suitable for being connected on live wire, the neutral line and the ground wire of three core power line devices commonly used.Switch 506 also comprises a control end T who is attached to communication controller 504 ₄, can driving switch 506 energisings and outage to make controller 504 by control signal from remote monitoring station 11.

Refer now to the instantaneous or lightning protection network 507 of Fig. 7 detailed consideration, instantaneous network 507 comprises the instantaneous signal of a series of metal oxide variable resistors of arranging in the usual way (not illustrating) to suppress to work as switch 506 connections or produced by analogues such as lightning-strikes.Filter network 507 is connected between high-tension transformer 510 and the switch 506.About this point, filter network 507 is connected on the switch 506 and by a series of respective wire 507A, 507B and 507C by a series of lead 506A, 506B and 506C and is connected on the transformer 510.A public ground wire 507D also is connected to filter network 507 on the high-tension transformer 510.

Refer now to Fig. 7 detailed consideration power source conversion network 508, power source conversion network 508 comprises high-tension transformer 510, and its conversion or rising supply power voltage make it reach suitable level high, are approximately 1500 volts of interchanges.

Be approximately 1000 volts high direct voltage for the ac high-voltage that high-tension transformer 510 is produced converts to, power source conversion network 508 also comprises a high-voltage rectifier 511.About this point, high transformer 510 is connected on the high-voltage rectifier 511 by a series of lead 510A, 510B and 510C.

High-tension transformer 510 also comprises a series of low pressure conversion coil 510D, supply voltage is changed into suitable interchange low-voltage.About this point, low-tension transformer 510D also is connected on the high-voltage rectifier 511 by a series of lead 510E, 510F and 510G.

Existing detailed consideration high-voltage rectifier 511, high-voltage rectifier 511 generally includes a conventional AC/DC rectifier 512A, and it will change direct voltage into by the alternating voltage of high pressure and low-tension transformer 510 and 510D supply respectively.AC/DC rectifier 512A is connected on the low-voltage dc power supply 512D, and it offers isolation network 503 and communication controller 504 by a series of lead 513A and 513B and 504A and 504B with suitable DC low-voltage respectively.

In order to regulate and control the high pressure output of rectifier 512A, so that it maintains 1000 volts of constant direct currents, power source conversion network 508 comprises a high pressure regulator 513.AC/DC rectifier 512A links to each other with high pressure regulator 513 with 512C through one group of lead 512B, and comprises common ground 511A.

The above power distribution parts of describing in conjunction with Fig. 7 502 provide suitable direct voltage respectively to pulse control assembly 505, isolation network 503 and communication controller 504.About this point, the output of voltage regulator 513 is connected on the pulse control assembly 505 by a series of lead 513C and 513D.

Existing detailed consideration pulse generating device 505, pulse generating device 505 generally includes an electric capacity charging control section part 514 and a capacitance group 515,515 comprises a series of electric capacity 516,517 and 518, delivers to the high voltage electricity in shaft bottom with storage, and this describes in detail afterwards.In order to make each capacitor discharge in the capacitance group 515, pulse production part 505 also comprises a switch control assembly 519 and a mains switch group 528.Electric capacity charging control section part 514 and switch control assembly 519 are all by communication controller 504 controls.About this point, communication controller 504 is delivered to electric capacity charging control section part 514 with control signal and is made selected electric capacity charging, and corresponding a series of control signals are delivered to a switch control assembly 519, with the capacitor discharge to selecting.

Coupling network 529 is connected between pulse production part 505 and the communication controller 504 by high voltage isolation network 503, is that shaft bottom motor control component 600 is used so that high-voltage pulse and control signal are delivered to the shaft bottom, will describe in detail later on.

When operation, the pulse control assembly 505 under communication controller 504 controls charges a series of electric capacity 516,517 and 518 that are positioned on the capacitance group 515 and discharges to produce high-voltage pulse, by control cable 19 these high-voltage pulses is supplied to the shaft bottom.About this point, in case electric capacity charging control section part 514 confirms that an electric capacity in capacitance group 515 is fully charged, it promptly transmits this information and gives communication controller 504.Communication controller 504 stores this information again, and transmits an enabling signal by high pressure isolation network 503 to switch control assembly 519, and mains switch group 528 is driven for this so that the capacitor discharge that charges.When electric capacity was discharged, a high-voltage pulse was sent to power pump sleeve part 13 in the shaft bottom.The high voltage pulse that is provided by electric capacity 516-518 imposes on pulsed coil 612,613 and 614 (Fig. 5) respectively, makes the armature reciprocating motion of linear dc motion actuator 26.After a specified capacitance had been discharged, electric capacity charging control section part 514 charged again by 504 pairs of discharge capacities of communication controller, so that it can discharge repeatedly.

Existing detailed consideration electric capacity charging control section part 514, electric capacity charging control section part 514 are connected between voltage regulator 513 and the capacitance group 515 to allow electric capacity 516-518 to be charged to a suitable voltage levvl.About this point, electric capacity charging control section part 514 comprises a series of analog switch (not shown), and it allows 1000 volts of direct currents of direct current regulator 513 to export on each electric capacity that is connected to capacitance group 515 selectively so that charging.The output of analog switch is connected on corresponding electric capacity 516,517 and 518 by a series of lead 516A, 516B, 516C and a public line of return 516D.Be appreciated that, although three electric capacity are connected on the control assembly 514 in a preferred embodiment, pulse generating device 505 can only comprise two electric capacity when being used to have the little power pump sleeve part of underproductivity, maybe when having requisite number purpose electric capacity for the needs (as oil well 15) that satisfy any capacity of oilwell.

Electric capacity charging control section part 514 also comprises the demultiplexer (not illustrating) of a routine, and it can be connected between analog switch and the communication controller 504 by high pressure isolation network 503 and a digital to analog converter 530.

About this point, controller 504 is delivered to digital to analog converter 530 with a digital controlled signal, so that digital controlled signal is become analog control signal.Analog control signal is connected on the demultiplexer by high voltage network 503.Demultiplexer is separated into analog signal its component to drive selected analog switch.

Electric capacity charging control section part 514 also comprises the charge sensor (not illustrating) of a series of routines, to determine the state of charge of each capacitor 516-518.Transducer is connected between each capacitor and the ground.From the output signal of different sensors by being configured in multiplexer (not shown) on the electric capacity charging control section part 514 by multiplexing.The output of multiplexer is connected (line 514B) by high pressure isolation network 503 to communication controller 504 with an analog converter 531, and this will describe in detail afterwards.

Refer now to Fig. 7 detailed consideration switch control assembly 519, switch control assembly 519 control capacitors 516,517 and 518 unlatching, and generally including the demultiplexer (do not have expression) of a routine, its input is connected on the controller 504 by isolation network 503 and digital to analog converter 532.Demultiplexer is separated into a series of control signals with control mains switch group 528 with analog signal, and this will describe in detail afterwards.

Refer now to Fig. 7 detailed consideration mains switch group 528, mains switch group 528 comprises a series of controllable silicons or mains switch 520,521 and 522.Mains switch 520,521 and 522 is connected on the demultiplexer that is configured in the switch control assembly 519 by a series of lead 520A, 520B and 520C respectively.As shown in Figure 7, each mains switch in mains switch group 528 has the corresponding electric capacity in capacitance group 515.Thereby whenever a given mains switch is activated (by switch control assembly 519), and the corresponding electric capacity relevant with the mains switch of selecting is discharged.

Existing detailed consideration switch control assembly 519 more, switch control assembly 519 is low-voltage components, and is powered by LVPS 512B by a series of lead 516C and 516D.Switch control assembly 519 receives sequencing information by high pressure isolation network 503 and digital to analog converter 532 from communication controller 504.Sequencing information determines how the charging capacitor in capacitance group 515 discharges in order.About this point, be understood that motor pulses control device 500 can be with any order to the capacitor discharge sequencing; Yet in the most preferred embodiment of the present invention, electric capacity is pressed 516,517 and 518 sequence discharge, is 518,517 and 516 then conversely.

Each switch 521,522 and 523 in mains switch group 528 is respectively by lead 516C and D, 517C and D, and 518C and D are connected on electric capacity 516,517 and 518.For future self-capacitance group 515 discharge energy be transferred to power pump sleeve part 13 in the shaft bottom, mains switch 521,522 and 523 output are connected on coupling network or the circuit 529 by couple of conductor 528A and B.

The coupling network or the circuit 529 of existing detailed consideration pulse control assembly 502, coupling network 529 is connected between mains switch group 528 and the high pressure buffer circuit 503, so that at shaft bottom transmission high-voltage pulse.Coupling network 529 also send and received well at the bottom of information, with control motor 26 and monitoring shaft bottom situation condition.Coupling network 529 generally includes an interface circuit 524, and (it has a transceiver 524A, with by one be connected to that signal on the cable 19/power lead 525A sends and received well at the bottom of information) and tuning circuit 524B (be used to produce a high voltage frequency signal, this signal does not disturb with low pressure frequency signal on lead 525A).Tuning circuit 524B is connected between mains switch group 528 and the single coaxial wire 19A by couple of conductor 525C and 525D.Lead 525D is loaded with high-voltage pulse signal and is connected on the cable 19.Coupling network 529 also comprises the optics coupling or the spacer assembly 509 of a routine, so that low-voltage dc power supply 512D is separated with the high-voltage pulse that carries in the shaft bottom by cable 19.Optical coupling device 509 is also connected to transceiver 524A and high-voltage isolator 503 (it will be coupled on the coupling device 509 from the low-voltage of power supply 512D by couple of conductor 509A and 509B).The optical coupling device is connected on the transceiver 524A by couple of conductor 509C and 509D.

Refer now to Fig. 7 detailed consideration transceiver 524A, transceiver 524A is the full bi-directional device of a routine of being familiar with concerning those skilled in the art.Transceiver 524A produces a modulation frequency signal, and this signal is applied on the single power lead 525A that is connected on the coaxial cable 19.About this point, power lead also provided low-voltage for shaft bottom motor control component 600 both provides control signal.

In order to separate the carrier signal that is modulated on the lead 525A, coupling network 529 also comprises the frequency interleaved modulation modulator/demodulator 527 of a routine.Frequency interleaved modulation modulator/demodulator 527 is connected between transceiver 524 (by couple of conductor 527C and 527D) and the high-voltage isolator 503 (by lead 527A and 527B).The control signal that frequency interleaved modulation modulator/demodulator 527 modulation receives from communication controller 504 is to be utilized by shaft bottom motor control component 600.Conversely, state/conditioned signal of producing in the shaft bottom of frequency interleaved modulation modulator/demodulator 527 demodulation is to be utilized by communication controller 504.

Existing detailed consideration tuning circuit 524B, tuning circuit 524B has the input that 528A and B is connected to mains switch group 528 by lead.Tuning circuit 524B repeatedly kicks into single coaxial cable 19A with mains switch line 528A and B, and cable 19A links in bifilar shaft power source/lifting cable 19.

Existing detailed consideration high pressure isolation network 503, isolation network 503 generally includes digital to analog converter 530 and 532, analog to digital converter 531 and a conventional isolation network 545.Digital to analog converter 530 is connected to coupling network 545 and the usefulness that communication controller 504 produces is thought that the digital controlled signal of capacitor discharge ordering is converted to by the used analog signal of electric capacity charging control section part 514 by lead 530A.Similarly, digital to analog converter 532 is connected to coupling network 545 by lead 532, and the digital controlled signal that will be produced by communication controller 504, sort for capacitor discharge changes into by the used analog signal of power control component 519.Analog to digital converter 531 will be indicated the analog-signal transitions of each electric capacity charged state in capacitance group 515 be the used digital signal of communication controller 504.About this point, analog to digital converter 531 is connected respectively between high voltage isolation network 503 and the communication controller 504 by lead 531A and lead 531B.

Existing detailed consideration communication controller 504, communication controller 504 generally includes a microprocessor 536, charging of its control capacitance and discharge, and monitoring well 15 and shaft bottom motor 26, also have the situation of motor control component 600.Be connected to 534 pairs of microprocessors of a low-tension supply, 536 power supplies of low-tension supply 512D, and comprise a rechargeable battery 534A, so that when main power source is out of order, keep controller power source.Communication controller 504 also comprises a solar panel 540C, links to each other so that rechargeable battery 534A is charged again with power supply 534.Microprocessor 536 programming is conventional in the mode of carrying out function as described herein and those skilled in the art are known, no longer describe in detail here.

For the order of the on/off by remote Surveillance center 11 automatic control switchs, 506 power supplys, communication controller 504 also comprises a communication network 533, with Surveillance center 11 and digital to analog converter 535 both-way communications so that opening and closing mains switch 506.

Existing detailed consideration microprocessor 536, microprocessor 536 is conventional 8286CPU parts.Microprocessor 536 be by lead 534C and D by low-tension supply 534 power supplies, 534C and D are connected on the low-voltage dc power supply 512D in the power distribution parts 501 by lead 504A and B.Microprocessor 536 also is connected on the communication network 533 by lead 536A and 536B respectively.

Communication controller 504 receives the electric capacity charge information from control assembly 514, receives armature position from motor-driven pump sleeve parts 13, produces a series of sequencing signals then and discharges with the electric capacity that passes to 519 pairs of capacitance group 515 of switch control assembly.Controller 504 also produces a control signal, and this signal is sent to shaft bottom motor control component 600 to control the pump motion of motor-driven pump sleeve parts 13 in the shaft bottom.Controller 504 also receives a plurality of sensor signals from the shaft bottom, relates to different conditions, for example, and temperature, fluid level height and armature displacement.Controller 504 sends to control monitoring center 11 with this information, and this will describe in detail afterwards.

Existing detailed consideration communication network 533, communication network 533 allows between microprocessor 536 and power pump sleeve part 13 at the shaft bottom both-way communication.Communication network 533 also allows both-way communication between the control centre 11 of remote location and microprocessor 536.Communication network 533 generally includes a full bi-directional modulator-demodulator 537, to allow the shaft bottom communication; A full bi-directional modulator-demodulator 538 is to allow the communication of Surveillance center 11; Radio frequency transmitter-receiver 539 and antenna 540 are to allow carrying out the radio frequency communication between monitoring center 11 and communication controller 504.

Transceiver 539 is connected between antenna 540 and the modulator-demodulator 537 by lead 539A, lead 538B.Transceiver 539 is powered by the low-tension supply 512D in the power distribution parts 501 by lead 504A and B.

High-visible by Fig. 7, low-tension supply 534 is connected on the solar panel 540 by lead 540A and B.Solar panel changes solar energy into electric current so that the rechargeable battery 534A in the power supply 534 is charged.About this point,, therefore, can make communication controller 504 and Surveillance center 11 keep continual communication even power supply 534 also can work under the situation that the power supply on the electric power source distribution device parts 501 disconnects.

Refer now to Fig. 6 detailed consideration Surveillance center 11, Surveillance center 11 generally includes a related network 410 and a microprocessor 402, and this microprocessor has a picture monitor 404 and keyboard 407.The data that microprocessor 402 storage receives from different shaft bottom system as system 9, propose about the warning that has potential or physical fault situation and to determining the useful performance data of reason potential or the physical fault situation to the staff of locality in inside.About this point, microprocessor 402 is connected to communication network 410 by a connection 410A.Microprocessor 402 is warned local staff by a CRT404 with regard to these situations.Be appreciated that other method, also can use at an easy rate as printer with local staff's communication.Microprocessor 402 also makes the performance change parameter be sent to transceiver 406, and it and local communication controller 504 carry out communication with transceiver 539 together.About this point, the data of emission are launched receiver 539 receptions and are stored in inside by local communication controller 504, to adjust the performance of shaft bottom power pump sleeve part 13 and pulse control assembly 502.

Go through communication network 410 referring now to Fig. 6, communication network 410 generally includes 417, one antennas 415 of 416, one full bi-directional modulator-demodulators of a transceiver and the power supply 418 that power supply is provided.Transceiver 416 is connected between modulator-demodulator 417 and the antenna 415 by lead 416A and lead 415A.Power supply 418 is connected on transceiver 416 and the modulator-demodulator 417 418A and 418B by lead.Be designed to allow local Surveillance center in conjunction with Fig. 6 and 7 pump control systems of describing 9 above, as Surveillance center 11, monitor the motor-driven pumping system of a plurality of straight line direct currents, as be positioned at its geographic area with system 10, the maintenance personal can be sent immediately and lost to deal with problems as early as possible when detecting undesired situation like this.With such method, significantly reduce the downtime of any given well, thereby increased the total output of well.Performance in also notified all oil wells relevant of the personnel of Surveillance center with system 9, operation problem, well situation and discarded situation or incipient fault.This provides an extremely valuable management tool to general headquarters' operation.The staff of Surveillance center 11 can close supervision basically with related all oil wells of system.Performance trend can be detected thus, and can predict accurately, in order to using in enterprise plan.

Refer now to the motor control component 600 of circle 5 detailed consideration electric machine controllers 12, motor control component 600 generally includes a mains switch control assembly 604, unlatching with control mains switch group 603, the mains switch group comprises a series of mains switches 608,609 and 610, is directed on selected pulsed coil 612,613 and 614 with the pulse electric charge that will deliver to the shaft bottom.Mains switch group 603 is connected between pulsed coil 612-614 and the FL- network 622, and 622 pass to mains switch group 603 with high-voltage pulse signal, and this will describe in detail afterwards.

For the high-voltage pulse and the low-voltage control signal that transmit in the shaft bottom among the code wire 525D, motor control component also comprises a light source isolator 601.Light source isolator 601 is connected to low-voltage dc power supply on the mains switch group 603 by couple of conductor 601A and 601B, and low pressure information is connected to emission receiving-member 605.Emission receiving-member 605 is similar to parts 524A, does not further describe at this.

In order to separate the information signal that is modulated to by cable 19 emission usefulness, motor control component 600 also comprises a signal control component 606.Signal control component 606 will describe in detail later, and it comprises the modulator/demodulator (there be not expression) of a frequency modulation, in order to the demodulating information signal.

During operation, motor control component 600 receives the high-voltage pulse of artesian well surface motor control assembly 500 and these high-voltage pulses is received on the suitable pulsed coil relevant with motor 26.The sequencing of switch is to drive by switch control assembly 603 under the control of communication controller 504 through signal multiplexing control assembly 602.Be appreciated that, although electric machine controller 12 parts as shown in most preferred embodiment are placed in the shaft bottom of shaft bottom motor control component 600, a part is placed on the ground of motor control component 500, and those those of ordinary skill in the art can also put into shaft bottom power pump sleeve part 13 with whole electric machine controller 12.This need make the shell of sleeve part longer significantly holding additional electronic unit certainly, but such arrangement is very familiar to one skilled in the art.

Existing detailed consideration FL-network 622, FL-network 622 generally includes the FL-network that a permission high frequency electric source signal is connected to mains switch group 603.FL-network 622 is connected on concentric conductor 524D and the mains switch group 603 by couple of conductor 622A and 622B.

Now go through DC power supply isolator 601, isolator 601 protects the electronic unit that is configured in the power pump sleeve part 13 to avoid the effect of too high voltages signal.Isolator 601 is connected between control cable 19 and the transceiver 605 by concentric conductor 525A, 525B and lead 602A, 602B.

Now go through signal control component 606, signal control component 606 is gone up at its incoming line (as line 602C and D) and is received respectively from the bottom-hole transmitter signal of transducer 616,617,618 and 621, and it is transferred on the controller 504 on ground.A multiplexing unit (not shown) is regulated input voltage and a plurality of incoming lines of multiplexing, as line 616A, 617A, 618A and 621A, to some lines than peanut.

In order to select signal to separate sensor actuation signal and coil, signal control component 606 also comprises a demultiplexer (not shown).Demultiplexer is connected to transducer, between transducer 616,617,618 and 621 (by lead 616A, 617A, 618A and 621A) and coil switch parts 604 (by lead 604A).

Now go through switches set 603, switches set 603 is substantially similar to mains switch group 528.The direct-current discharge pulse that mains switch group 603 receives from filter network 622, and utilize this signal to produce an electricity-magnetic force so that magnetic armature 30 is moved in a reciprocal manner.Switches set 603 generally includes mains switch 608,609 and 610, and they are identical with mains switch 521,522 and 523 basically.Switch 608,609 and 610 is interconnected their input to 622A and 622B by lead, and the output of switch 608-610 simultaneously is connected respectively on pulsed coil 612,613 and 614.Each pulsed coil that is configured in the motor 26 has a switch.Switch 608 is connected on the pulsed coil 612 by lead 612A and B; Switch 609 is connected on the pulsed coil 613 by lead 613A and B; Switch 610 is connected on the pulsed coil 614 by lead 614A and B.

Refer now to Fig. 5 and go through coil switch parts 604, coil switch parts 604 comprise a demultiplexer (not shown), select Signal Separation to become separately control signal coil, to control the unlatching of mains switch 608,609 separately and 610.About this point, coil switch parts 604 are connected on each mains switch 608-610 by a series of lead 604A, 604B and 604C respectively.

Coil switch parts 604 also comprise a switching network (not shown), and it is connected on the corresponding mains switch each corresponding control signal.

In most preferred embodiment of the present invention, have only 3 pulsed coils, promptly 612,613 and 614, they want to obtain a reciprocating motion that is enough to suction shaft bottom liquid from well.Be understood that when needing bigger suction capactity, can add other pulsed coil switch block.

Though several specific embodiments of the present invention is disclosed, be appreciated that various change is possible and can expects it is within the true spirit and scope of appended claims.Therefore, the present invention is not limited to summary disclosed herein or specification.

Claims (1)

1. The method of linear dc motion actuator at the bottom of a kind of control well is characterized in that may further comprise the steps:

   Give a series of electric capacity chargings in order with high-voltage DC power supply:

   When fully charging, make described capacitor discharge in order, to produce a plurality of high-voltage dc pulses;

   Transmit said high-voltage direct-current pulse with the broadcasting frequency modulated carrier signal that includes pulsed coil unlatching information to the shaft bottom;

   On the said high-voltage dc pulse of said carrier signal gate more selecteed pulsed coils to a series of pulsed coils;

   In response to the selecteed pulsed coil that receives said high-voltage pulse, with linear fashion mobile armature device; And,

   Change the polarity of said high-voltage dc pulse, so that said armature device moves with opposite linear fashion.

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