CN208564927U - Hydraulic piston pump, underground pump assembly and underground drain test macro - Google Patents
Hydraulic piston pump, underground pump assembly and underground drain test macro Download PDFInfo
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- CN208564927U CN208564927U CN201820621717.1U CN201820621717U CN208564927U CN 208564927 U CN208564927 U CN 208564927U CN 201820621717 U CN201820621717 U CN 201820621717U CN 208564927 U CN208564927 U CN 208564927U
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Abstract
This application discloses a kind of hydraulic piston pump, underground pump assembly and underground drain test macro, hydraulic piston pump includes that pump seat and seat enter the pump core in pump seat；The pump core includes lower piston cylinder, upper piston cylinder, commutation pipe nipple, reversal valve, hollow connecting rod piston group and the lower contact for being fixed on lower piston cylinder bottom end between upper piston cylinder and lower piston cylinder；The top of the upper piston cylinder is equipped with crossover sub.The technical solution of the application can separate power fluid and formation fluid, and can realize downhole closing and heavy oil heating.
Description
Technical field
The present disclosure relates generally to oil well formation testing, the field of test technology, and in particular to using hydro powered, enclosed circulation
Hydraulic piston pump, underground pump assembly and underground drain test macro.
Background technique
Currently, in oil/gas well formation testing, the field of test technology, stratum drain frequently with flowing back by hydraulic pump or screw pump drain,
Wherein hydraulic pump mainly has hydraulic jet pump and hydraulic piston pump.
Currently used hydraulic pump, either jet pump or piston pump, working method are thrown in working string
Enter pump core, working string should be at least made of from top to bottom oil pipe, pump seat and packer etc., and pump core is sent into well by ground face-pumping
Under pump seat, then improve pump pressure, drive underground pump work, the ring by formation fluid together with power fluid between oil pipe and casing
Ground is returned out in shape space (abbreviation oil-set annular space), after surface separation is measured, a part of mixed liquor is separated and is further used as moving
Power liquid pump enters underground, drives underground pump work.From oil-set annular space pumping liquid when playing pump, returned out out of operation tubing, by pump core
Go out well head.Namely pump and drain under direct circulation, reacting cycle play pump.This working method very simple, conveniently, so obtaining
More universal application.But their common drawback is all that formation fluid and power fluid mix discharge, this is to the true of formation fluid
The real bad judgement of fluidity.
Screw pump drain can get simple formation fluid, but torque limit due to sucker rod and screw rod and pump barrel it
Between dynamic sealing leakage, jacking capacity is limited, is usually no more than the pressure difference of 10MPa.In addition, the application to heavy crude heat extraction also has
Significant limitation.
Power fluid and formation fluid can be separated using hydraulic piston pump drain, that is, power fluid closed circulation,
To separate power fluid and formation fluid, just it is necessary for power fluid and one circulation canal is provided again.Common practice is in big oil
Next layer of little oil pipe again in pipe, forms concentric tube column, and piston pump pump core is put into little oil pipe and pumped by when drain takes a seat, after
After the piston group of continuous pressurization transfer tube in-core moves back and forth, annular space of the weary power fluid between little oil pipe and Big Inch is returned
Ground forms power fluid closed circulation.Then ground is discharged in the annular space between Big Inch and casing to formation fluid.It is needed when playing pump
Pump core can be gone out well head by the annular space pumping liquid between little oil pipe and Big Inch.It is as miscellaneous in " petroleum machinery " in published
On will the 7th phase in 2002 an article "The development and application of concentric tube column enclosed hydraulic piston pump " in introduce that
Sample.
Above-mentioned concentric tube column enclosed hydraulic piston pump is mainly used for DP technology, to be used for formation testing, test drain is mainly deposited
Following several respects the problem of:
First is that removing pump core out of central tube, it certainly will require central tube that there is enough interior latus rectums, if interior latus rectum is too small
Then pump core will be smaller, not only increase the difficulty of processing of pump core in this way, and lifting rate certainly will also reduce.If 51/ 2 " it covers
Intraductal operation, central tube maximum can only select 23/8" oil pipe (internal diameter 50.8mm), outer tube maximum can only select 31/2" oil pipe
(internal diameter 76mm), the maximum outside diameter of pump core is no more than 50mm.Such 51/2" casing operation most common 27/8" oil pipe is all used not
On, need replacing all operation tubings, at high cost, poor universality.
Second is that across one layer of weary power fluid channel between power fluid channel and formation fluid channel, such as viscous crude, heated power
The thermal energy of liquid, which cannot directly act on viscous crude, makes its thawing.That is formation fluid channel and power fluid channel be not close to unfavorable
In the realization of heavy crude heat extraction.
Third is that pump core itself can not achieve downhole closing, do not have test function.
Summary of the invention
In view of drawbacks described above in the prior art or deficiency, being intended to provide one kind can separate power fluid and formation fluid, pump
Core discharge capacity is big, it is at low cost, downhole closing can be facilitated and can realize the hydraulic piston pump of heavy oil heating, underground pump assembly and underground
Drain test macro.
In a first aspect, the application provides a kind of hydraulic piston pump, the pump core in pump seat is entered including pump seat and seat；The water
The pump core of power piston pump includes lower piston cylinder, upper piston cylinder, the commutation pipe nipple between upper piston cylinder and lower piston cylinder, commutation
Valve, hollow connecting rod piston group and the lower contact for being fixed on lower piston cylinder bottom end；The top of the upper piston cylinder, which is equipped with, to be turned
Changing-over head；
The hollow connecting rod piston group include across it is described commutation pipe nipple hollow connecting rod and be connected to hollow connecting rod both ends
And the upper piston and lower piston cooperated respectively with upper piston cylinder and lower piston cylinder dynamic sealing；On the upper piston and lower piston be
Under penetrating hollow structure；The interior lower end of the crossover sub is provided with fixed valve；Shut-in valve is equipped in the lower contact；Institute
It states and is equipped with travelling valve in upper piston；
The reversal valve, which can slide up and down to, to be arranged between commutation pipe nipple and the hollow connecting rod.
According to technical solution provided by the embodiments of the present application, the reversal valve be located at the commutation pipe nipple and hollow connecting rod it
Between commutation it is intracavitary and will commutation chamber radial separations be power sap cavity and weary power sap cavity；The top of the commutation pipe nipple is provided with
The power fluid flowed between pump seat and pump core is imported into the power fluid entrance of power sap cavity.
According to technical solution provided by the embodiments of the present application, the pump seat includes outer cylinder, and the middle part of the outer cylinder is equipped with outer
Cylinder circulation port；The side wall of the commutation chamber is respectively arranged with the upper piston chamber inlet being communicated in upper piston cylinder from top to bottom, connects
The weary power fluid outlet for leading to outer cylinder circulation port, the lower piston chamber inlet being communicated in lower piston cylinder；In the reversal valve
Portion radially offers commutation mouth；When the reversal valve is located at its lower limit site, the upper piston chamber inlet is directly moved with described
The conducting of power sap cavity, the weary power fluid outlet and lower piston chamber inlet are connected with weary power sap cavity simultaneously；When the reversal valve
When limit point disposed thereon, the lower piston chamber inlet is connected by the mouth that commutates with the power sap cavity, the weary power fluid row
Outlet and upper piston chamber inlet are connected with weary power sap cavity simultaneously；
It is close to hollow connecting rod and is extended with spool upwards in the bottom of the commutation chamber；The reversal valve lower part insertion spool with
Between commutation pipe nipple；Pressure transmission hole is provided between the bottom of the spool and the commutation pipe nipple；The spool is towards hollow company
Bar side is provided with diversion trench in the middle part of face；The commutation pipe nipple is provided with below the spool to be connected to outer cylinder circulation port
Relief hole；The upper portion side wall of the hollow connecting rod is provided with reversing groove, lower part is provided with a pair of adjacent lower reversing groove；
When the hollow connecting rod is located at its lower limit site location, the upper reversing groove is connected to the relief hole simultaneously and passes
Press hole；
Boss and institute when hollow connecting rod limit point position disposed thereon, between two lower reversing grooves
It is corresponding to state diversion trench, so that the pressure transmission hole is connected with the power sap cavity.
According to technical solution provided by the embodiments of the present application, sliding sleeve is equipped in the outer cylinder；The top of the sliding sleeve is fixed
There is pawl；The pump core is externally provided with the pawl slot for blocking pawl；The outer tube inner wall is above and below the sliding sleeve
It is separately provided for blocking the top fastening station of the pawl of opening and is used to support getting out of a predicament or an embarrassing situation for sliding sleeve bottom end, the sliding sleeve and outer cylinder
Upper to offer sliding sleeve circulation port and outer cylinder circulation port respectively, the sliding sleeve circulation port and outer cylinder circulation port are located at it in the sliding sleeve
It is staggered when alignment, dead-centre position disposed thereon when lower dead point position.
Second aspect, the application provide a kind of underground pump assembly, including oil pipe, packer, hollow rod and above-mentioned
Anticipate a kind of hydraulic piston pump, the working string in the oil pipe, pump seat and packer composition tripping in down-hole casing, the pump core and
The hollow rod for being connected to pump core top forms the drain tubing string being lowered into working string；The packer is located at the pump
The lower section of seat.
According to technical solution provided by the embodiments of the present application, the bottom end of the pump core is equipped with pressure gauge.
According to technical solution provided by the embodiments of the present application, sand-proof pipe is provided with below the packer.
According to technical solution provided by the embodiments of the present application, the crossover sub is tightly connected with pump seat, the conversion
Connector is used to that being located under crossover sub between pump core and pump seat will to be imported into from the power fluid that hollow rod enters pump core
The formation fluid extracted out out of pump core is simultaneously drained into being located above crossover sub between pump core and pump seat by the annular space of side
Annular space.
The third aspect, the application provide a kind of underground drain test macro, including any one of the above underground pump assembly, dynamic
Power fluid circulation and formation fluid metering system；The power fluid circulation includes that power is provided in the hollow rod
The power fluid holding vessel that the water injecting pump of liquid, the annular chamber between casing and oil pipe are connected to；The formation fluid metering system includes
The formation fluid holding vessel that annular housing between hollow rod and oil pipe is connected to；The water injecting pump is stored from the power fluid
Power fluid is extracted in tank.
According to technical solution provided by the embodiments of the present application, heating is provided between the power fluid holding vessel and water injecting pump
Device.
The application is by being arranged to double-acting pump for pump core, so that work efficiency is high for hydraulic piston pump, lifting rate is stablized；
Simultaneously the application the mating connections such as pump seat and oil pipe, packer are formed into working string, by hollow rod and
The mode that pump core is directly connected to realizes one layer of oil pipe of tripping in casing and is formed power fluid input channel, power fluid row
The closed loop channel in channel and formation fluid passing away out；The side of tripping in double layer oil pipe in casing in compared with the prior art
Formula, the outer diameter of pump core can be accomplished bigger, so that the discharge capacity of pump core is bigger, difficulty of processing is smaller, life to reduce pump core
Produce cost.
It according to technical solution provided by the embodiments of the present application, is designed, is realized and pump core using pawl type sliding sleeve in pump seat
Linkage, when pump core is seated in sliding sleeve and is moved down by pressurizing urges sliding sleeve, the pawl on sliding sleeve is shunk, and is stuck in outside pump core
In pawl slot, sliding sleeve and pump core is set to link, until bottom dead centre；The circulation canal on pump seat is opened, it can be achieved that drain function at this time
Energy；Under normal conditions namely when pump core does not enter pump seat, the pawl on sliding sleeve is in open configuration and is made by top fastening station structure
Sliding sleeve is maintained at upper dead center position, and the circulation canal on pump seat is closed at this time, and pump seat has all-pass and bearing capacity, can be with
Various operations, such as perforation, test, acidification, pressure break operation are carried out to stratum.
The drain test macro of the application also has test function, after drain after a period of time, is needing to close production
When liquid channel measures pressure recovery, power fluid circulation canal can be closed, then be suppressed from formation fluid channel, make the pass in pump core
Well valve is in reversed pressurized state and keeps, and shut-in valve equally blocks formation fluid channel as a plug at this time, realizes well
Lower closing well, pressure gauge will record the pressure, temperature variation of entire drain test process.
The drain test macro of the application in such a way that power fluid channel and weary power fluid channel surround formation fluid channel,
It applies in thickened oil recovery, the heating to viscous crude can be realized by way of heating to power fluid.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 is the structural schematic diagram of hydraulic piston pump when hollow connecting rod is located at its lower dead point position；
The structural schematic diagram of hydraulic piston pump when Fig. 2 is hollow connecting rod dead-centre position disposed thereon；
Fig. 3 is the structural schematic diagram of commutation pipe nipple when hollow connecting rod is located at its lower dead point position；
Commutate the structural schematic diagram of pipe nipple when Fig. 4 is hollow connecting rod dead-centre position disposed thereon；
Fig. 5 is the structural schematic diagram of hollow connecting rod piston group in the application；
Fig. 6 is the structural schematic diagram of pump seat before pump core is taken a seat；
Fig. 7 is the structural schematic diagram of pump seat after pump core is taken a seat；
Fig. 8 is the structural schematic diagram of the application underground pump assembly；
Fig. 9 is the structural schematic diagram of the crossover sub on pump core top；
Figure 10 is the structural schematic diagram of drain test macro in underground in the application.
Figure label:
10, casing；20, working string；30, drain tubing string；40, power fluid circulation；70, oil pipe threeway；60, oily
Pipe hanger；
21, pump seat；22, oil pipe；23, packer；24, sliding sleeve；25, pawl；26, outer cylinder circulation port；27, sliding sleeve recycles
Hole；28, outer cylinder；31, pump core；32, hollow rod；33, pawl slot；34, crossover sub；35, pressure gauge；41, water injecting pump；
42, power fluid holding vessel；51, formation fluid holding vessel；
31-2, upper piston cylinder；31-3, lower piston cylinder；31-4, hollow connecting rod；31-5, commutation pipe nipple；31-6, reversal valve；
31-7, fixed valve；31-8, shut-in valve；31-9, travelling valve；31-10, lower contact
34-1, upper cylindrical section；34-2, lower cylindrical section；34-3, convergence part；34-4, the first tilt port；34-5, the second inclination
Mouthful；
31-4-1, upper reversing groove；31-4-2, lower reversing groove；31-4-3, upper piston；31-4-4, lower piston；
31-5-1, power sap cavity；31-5-2, weary power sap cavity；31-5-3, power fluid entrance；31-5-4, upper piston room
Entrance；31-5-5, weary power fluid outlet；31-5-6, lower piston chamber inlet；
31-5-7, spool；31-5-8, pressure transmission hole；31-5-9, relief hole；31-5-7-1, diversion trench；
31-6-1, commutation mouth.
Specific embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining related invention, rather than the restriction to the invention.It also should be noted that in order to
Convenient for description, part relevant to invention is illustrated only in attached drawing.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
A kind of a kind of structural schematic diagram of embodiment of hydraulic piston pump, including pump are provided as depicted in figs. 1 and 2 for the application
Seat 21 and seat enter the pump core 31 in pump seat 21；The pump core 31 of the hydraulic piston pump includes lower piston cylinder 31-3, upper piston cylinder
31-2, the commutation pipe nipple 31-5 between upper piston cylinder 31-2 and lower piston cylinder 31-3, reversal valve 31-6, hollow connecting rod are living
Plug group and the lower contact 31-10 for being fixed on the bottom end lower piston cylinder 31-3；The top of the upper piston cylinder 31-2, which is equipped with, to be turned
Changing-over head 34；
The hollow connecting rod piston group include across it is described commutation pipe nipple 31-5 hollow connecting rod 31-4 and be connected to it is hollow
The both ends connecting rod 31-4 and respectively the upper piston 31-4-3 and lower work with upper piston cylinder 31-2 and the cooperation of lower piston cylinder 31-3 dynamic sealing
Fill in 31-4-4；The upper piston 31-4-3 and lower piston 31-4-4 is transparent hollow structure；The crossover sub 34
Interior lower end be provided with fixed valve 31-7；Shut-in valve 31-8 is equipped in the lower contact 31-10；In the upper piston 31-4-3
Equipped with travelling valve 31-9；
The reversal valve 31-6, which can slide up and down to, to be arranged between the commutation pipe nipple 31-5 and hollow connecting rod 31-4.
Preferably, as shown in Figure 3 and Figure 4, the reversal valve 31-6 is located at the commutation pipe nipple 31-5 and hollow connecting rod
Commutation between 31-4 is intracavitary and is power sap cavity 31-5-1 and weary power sap cavity 31-5-2 by commutation chamber radial separations；It is described
The top of commutation pipe nipple 31-5, which is provided with, imported into power sap cavity 31-5- for the power fluid flowed between pump seat 21 and pump core 31
1 power fluid entrance 31-5-3.
Preferably, the pump seat 21 includes outer cylinder 28, and the middle part of the outer cylinder is equipped with outer cylinder circulation port 26；The commutation chamber
Side wall be respectively arranged with the upper piston chamber inlet 31-5-4 being communicated in upper piston cylinder 31-2 from top to bottom, be communicated to outer cylinder
The weary power fluid outlet 31-5-5 of circulation port 26, the lower piston chamber inlet 31-5-6 being communicated in lower piston cylinder 31-3；It is described
The middle part of reversal valve 31-6 radially offers commutation mouth 31-6-1；It is described when the reversal valve 31-6 is located at its lower limit site
Upper piston chamber inlet 31-5-4 is directly connected with the power sap cavity 31-5-1, the weary power fluid outlet 31-5-5 and lower work
Plug chamber inlet 31-5-6 is connected with weary power sap cavity 31-5-2 simultaneously；When reversal valve 31-6 limit point disposed thereon, institute
It states lower piston chamber inlet 31-5-6 to be connected by the mouth 31-6-1 that commutates with the power sap cavity 31-5-1, the weary power fluid discharge
Mouth 31-5-5 and upper piston chamber inlet 31-5-4 is connected with weary power sap cavity 31-5-2 simultaneously；
It is close to hollow connecting rod 31-4 and is extended with spool 31-5-7 upwards in the bottom of the commutation chamber；The reversal valve 31-6's
Lower part is inserted between spool 31-5-7 and commutation pipe nipple 31-5；The bottom of the spool 31-5-7 and the commutation pipe nipple 31-5 it
Between be provided with pressure transmission hole 31-5-8；The spool 31-5-7 is towards being provided with diversion trench 31- in the middle part of the side hollow connecting rod 31-4
5-7-1；The commutation pipe nipple 31-5 is provided with the relief hole being connected to outer cylinder circulation port 26 below the spool 31-5-7
31-5-9；As shown in figure 5, the upper portion side wall of the hollow connecting rod 31-4 is provided with reversing groove 31-4-1, lower part is provided with a pair of of phase
Adjacent lower reversing groove 31-4-2；
When the hollow connecting rod 31-4 is located at its lower limit site location, the upper reversing groove 31-4-1 is connected to institute simultaneously
State relief hole 31-5-9 and pressure transmission hole 31-5-8；
When the limit point position disposed thereon the hollow connecting rod 31-4, between two lower reversing groove 31-4-2
Boss is corresponding with the diversion trench 31-5-7-1, so that the pressure transmission hole 31-5-8 and power sap cavity 31-5-1
Conducting.
As shown in Figure 1 to 4, pump core 31 is entered from the power fluid being pumped into from 31 top of pump core by crossover sub 34
Between pump seat 21 in annular chamber.Then it is entered by the power fluid entrance 31-5-3 of the commutation pipe nipple 31-5 in pump core 31 dynamic
In power sap cavity 31-5-1；
As shown in Figure 1 and Figure 4, when the reversal valve 31-6 is in lower limit site, the upper piston chamber inlet 31-5-4
It is directly connected to the power sap cavity 31-5-1, power fluid enters upper piston cylinder 31-2 by upper piston chamber inlet 31-5-4
It is interior, push hollow connecting rod piston group to move upwards, the pressure in lower piston cylinder 31-3 reduces, and down-hole pressure pushes shut-in valve 31-8
It opens, formation fluid is inhaled into lower piston cylinder, at this point, making since the intracavitary pressure of the formation fluid of upper piston cylinder 31-2 increases
Travelling valve 31-9 is closed, and fixed valve 31-7 is opened, and the formation fluid intracavitary positioned at the formation fluid of upper piston cylinder 31-2 is from fixed valve
31-7 discharge；Simultaneously the weary power fluid outlet 31-5-5 and lower piston chamber inlet 31-5-6 simultaneously with weary power sap cavity 31-
5-2 conducting；Weary power fluid in lower piston cylinder 31-3 passes sequentially through lower piston chamber inlet 31-5-6, weary power fluid outlet
31-5-5 and outer cylinder circulation port 26 are discharged, and enter the annular space between pump seat 21 and casing 10.
As shown in Figures 2 and 3, when hollow connecting rod piston group moves to upper dead center position, two lower reversing groove 31-
Boss between 4-2 is corresponding with the diversion trench 31-5-7-1, so that the pressure transmission hole 31-5-8 and the power
Sap cavity 31-5-1 conducting, high voltage power liquid act on the bottom of reversal valve 31-6 simultaneously, and reversal valve is pushed to be moved upwards up to the upper limit
Site location.At this point, the lower piston chamber inlet 31-5-6 is led by the mouth 31-6-1 and power sap cavity 31-5-1 that commutates
Logical, power fluid is intracavitary by the power fluid that lower piston chamber inlet 31-5-6 enters lower piston cylinder 31-3, pushes hollow connecting rod living
Plug group moves downward；Fixed valve 31-7 is closed at this time, and travelling valve 31-9 is opened, and formation fluid passes through the center of hollow connecting rod piston group
The formation fluid that hole is inhaled into upper piston cylinder 31-2 is intracavitary.The weary power fluid outlet 31-5-5 and upper piston chamber inlet simultaneously
31-5-4 is connected with weary power sap cavity 31-5-2 simultaneously, and the weary power fluid intracavitary positioned at the power fluid of upper piston cylinder 31-2 successively leads to
It crosses upper piston chamber inlet 31-5-4, weary power fluid outlet 31-5-5 and outer cylinder circulation port 26 is discharged, enter pump seat 21 and set
Annular space between pipe 10.
Preferably, as shown in Figure 6 and Figure 7, sliding sleeve 24 is equipped in the outer cylinder 28 of the pump seat 21；The top of the sliding sleeve 24
End is fixed with pawl 25；The pump core 31 is externally provided with the pawl slot 33 for blocking pawl 25；28 inner wall of outer cylinder is described
It is separately provided for blocking the top fastening station of the pawl of opening above and below sliding sleeve 24 and is used to support 24 bottom end of sliding sleeve
It gets out of a predicament or an embarrassing situation, offers sliding sleeve circulation port 27 and outer cylinder circulation port 26, the sliding sleeve circulation on the sliding sleeve 24 and outer cylinder 28 respectively
Hole 27 and outer cylinder circulation port 26 be aligned when the sliding sleeve 24 is located at its lower dead point position, dead-centre position disposed thereon when be staggered
's.
As shown in fig. 6, sliding sleeve 24 is in its upper dead center position when pump core 31 is not seated in, the outer cylinder of outer cylinder 28 is recycled at this time
Hole 26 is staggered with the sliding sleeve circulation port 27 on sliding sleeve 24, and outer cylinder 28 is closed, while the pawl 25 on sliding sleeve 24 is in and opens shape
State makes sliding sleeve 24 keep dead-centre position on it.As shown in fig. 7, when pump core 31 is seated in pump seat 21 with drain tubing string 30, it is sliding
Pawl 25 on set 24 is aligned with the pawl slot 33 of pump core 31, and when being moved down by pressurizing urges sliding sleeve 24, pawl 25 is shunk,
Sliding sleeve 24 and pump core 31 is set to link, until the bottom end of sliding sleeve 24 reaches its lower dead point position.Outer cylinder circulation on outer cylinder 28 at this time
Hole 26 is aligned with the sliding sleeve circulation port 27 on sliding sleeve 24, and the circulation canal of pump seat 21 is opened.
When playing out pump core 31 after drain, by, with upward lifting force, being pumped due to being seated in 30 top of drain pipe column
The pawl 25 on sliding sleeve 24 when core 31 in pump seat 21 has been shunk, and has been stuck in the pawl slot 33 of 31 outside of pump core and has been formed with pump core
Then linkage discharges so the sliding sleeve 24 when acting pump core 31 in pump seat 21 will also return to the position of top fastening station in company with pump core 31
Pump core 31, pump core 31 are removed, thus by the circulation canal close synchronously on pump seat 21.When above-mentioned hydraulic piston pump is applied in well
When lower drain, pump seat 21 can resume operation the all-pass and bearing capacity of tubing string 20 after rising out, and can also carry out other any works
Industry.
As shown in the structural schematic diagram of Fig. 8 underwater pump assembly provided by the present application, underwater pump assembly includes oil pipe 22, packing
Device 23, hollow rod 32 and any one of the above hydraulic piston pump, the oil pipe 22, pump seat 21 and packer 23 form tripping in
Working string 20 in down-hole casing 10, the pump core 31 and the composition of hollow rod 32 for being connected to 31 top of pump core are lowered into
Drain tubing string 30 in working string 20；The packer 23 is located at the lower section of the pump seat 21.Up and down the two of above-mentioned pump seat 21
End be respectively equipped with female thread and pin thread, so as to oil pipe or other tool screwed connections of going into the well.
When field operation, first by designed working string 20 in order tripping in construction wellbore casing 10 in, and will envelope
It sets every device 23 in underground predetermined position；Again by 30 tripping in working string 20 of drain tubing string when needing drain, so that pump core 31
It sits in pump seat 21；When drain, power fluid enters out of hollow rod 32, and the power moved back and forth, pump are provided to pump core 31
Annular space discharge of the formation fluid that core 31 is pumped from underground between hollow rod 32 and oil pipe 22, the weary of pump core 31 are moved
Annular space discharge of the power liquid between oil pipe 22 and casing 10；Preferably, pressure gauge 35 can be connected in the bottom end of pump core 31,
Pressure gauge 35 is removed with drain tubing string 30 to underground, for the pressure, temperature variation under monitoring well at any time.
In the above-described embodiments, such as casing 10 is 51/2" casing, oil pipe 32 are common 27/8" pipe aperture 62mm,
Then the outer diameter of pump core can accomplish 58~60mm in the present embodiment, and one-shot discharge capacity is improved than 50mm concentric tube column hydraulic piston pump
50% or so.
For prevent formation sand production enter produce liquid channel drain is adversely affected, can in working string 20 packer
Sand-proof pipe is arranged in 23 lower sections, to prevent the mechanical admixtures such as reservoir sand from entering inside working string.
Above-mentioned power fluid can be clear water or add some lubricants in clear water and is made, and preparation is very convenient, at low cost.
Preferably, the crossover sub 34 is tightly connected with pump seat 21, and the crossover sub 34 is used for will be from hollow pumping
The power fluid that beam hanger 32 enters pump core 31 imported into the annular for being located at 34 lower section of crossover sub between pump core 31 and pump seat 21
The formation fluid extracted out out of pump core 31 is simultaneously drained into being located above crossover sub 34 between pump core 31 and pump seat 21 by space
Annular space.As shown in figure 9, the crossover sub 34 includes upper cylindrical section 34-1, lower cylindrical section 34-2 and the upper cylindrical section of linking
Convergence part 34-3 between 34-1 and lower cylindrical section 34-2；The convergence part 34-3 is outwardly protruded to be tightly connected with pump seat 21, makes
It obtains the annular space between pump core 31 and pump seat 21 and is separated into two parts up and down；The first tilt port is equipped in the convergence part 34-3
34-4 and the second tilt port 34-5；The power fluid entered out of hollow rod 32 is transferred into pump by the first tilt port 34-4
The annular space being located at below the 34-3 of convergence part between core 31 and pump seat 21, and the formation fluid extracted out in pump core 31 is passed through the
Two tilt port 34-5, which are drained between pump core 31 and pump seat 21, is located at convergence part 34-3 upper annular space.
The fixed valve 31-7, travelling valve 31-9 and shut-in valve 31-8 are check valves, and formation fluid can only be upwardly through upper
Check valve is stated, and cannot be passed downwardly through；When hollow connecting rod piston group moves upwards, travelling valve 31-9 is closed, fixed valve 31-7
It opens, the formation fluid above upper piston 31-4-3 is given rise to the top of fixed valve 31-7, hence into hollow rod
Annular space between 32 and oil pipe 22；When hollow connecting rod piston group moves downward, fixed valve 31-7 closing, travelling valve
31-9 is opened, and formation fluid is entered above upper piston by travelling valve 31-9, repeatedly can continuously lift formation fluid
To ground, shut-in valve 31-8 is constantly in opening state in this discharge opeing process.
As shown in Figure 10, shown in the structure principle chart of drain test macro in underground provided by the present application, underground drain test
System includes any one of the above underground pump assembly, power fluid circulation 40 and formation fluid metering system；The power fluid follows
Loop system 40 includes the ring provided between the water injecting pump 41 and casing 10 and oil pipe 22 of power fluid in the hollow rod 32
The power fluid holding vessel 42 of shape chamber connection；The formation fluid metering system includes between hollow rod 32 and oil pipe 22
The formation fluid holding vessel 51 of annular housing connection；The water injecting pump 41 extracts power fluid out of described power fluid holding vessel 42.This
The technical staff in field is according to common sense it is found that being additionally provided with the pipe for connecting each system and component in above-mentioned underground drain test macro
Road and the valve being mounted on pipeline.
When field operation, first by designed working string 20, tripping in is constructed in wellbore in order, and packer 23 is sat
It is enclosed in underground predetermined position, and seated tubing hanger 60, connected pipes threeway 70.Various operations can be carried out to target zone at this time,
Such as perforation, acidification, pressure break.
Again by drain tubing string 30 in order tripping in working string 20 when needing drain, and pump core 21 is made to be seated in pump seat 31,
The circulation canal on pump seat 31 is opened by the decentralization pressurization of drain tubing string 30, reconnects active power fluid circulation 40 and stratum
Liquid metering system.Then start water injecting pump 41, power fluid is transported to pump core 21 by hollow rod, drives the sky in pump core 21
Heart connecting rod piston group moves back and forth, and formation fluid is given rise to ground by the annular space between hollow rod 32 and oil pipe 22
It separated, measured.Weary power fluid then passes through the annular space between oil pipe 22 and casing 10 and returns to power fluid holding vessel 42,
Water injecting pump pressurization is entered back into after filtering, forms power fluid closed circulation, driving underground pump piston group ceaselessly moves back and forth, from
And formation fluid is constantly given rise into ground.
When needing closing well, shut-in valve 31-8 can be made to be in reversed pressurized state from producing liquid channel and suppressing, so that it may keep production liquid logical
Road is shut, thus realize downhole closing, it is easy to operate.
Preferably, heating device is provided between the power fluid holding vessel 42 and water injecting pump 41；If it is heavy oil wells, then
Heating device, such as heating furnace are being set between power fluid holding vessel 42 and water injecting pump 41 in power fluid circulation 40, will moved
Power liquid is heated to be pumped into underground out of hollow rod 32 again after certain temperature, in this way, the heat that hollow rod 32 distributes will
Directly melt viscous crude, to be able to smooth drain.The heating temperature of power fluid, which is subject to, can be such that viscous crude melts.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art
Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic
Scheme, while should also cover in the case where not departing from the inventive concept, it is carried out by above-mentioned technical characteristic or its equivalent feature
Any combination and the other technical solutions formed.Such as features described above and (but being not limited to) disclosed herein have it is similar
The technical characteristic of function is replaced mutually and the technical solution that is formed.
Claims (10)
1. a kind of hydraulic piston pump, which is characterized in that enter the pump core (31) in pump seat (21) including pump seat (21) and seat；It is described
Pump core (31) includes lower piston cylinder (31-3), upper piston cylinder (31-2), is located at upper piston cylinder (31-2) and lower piston cylinder (31-3)
Between commutation pipe nipple (31-5), reversal valve (31-6), hollow connecting rod piston group and be fixed on lower piston cylinder (31-3) bottom
The lower contact (31-10) at end；The top of the upper piston cylinder (31-2) is equipped with crossover sub (34)；
The hollow connecting rod piston group include across it is described commutation pipe nipple (31-5) hollow connecting rod (31-4) and be connected to hollow
The connecting rod both ends (31-4) and the upper piston (31-4- cooperated respectively with upper piston cylinder (31-2) and lower piston cylinder (31-3) dynamic sealing
And lower piston (31-4-4) 3)；The upper piston (31-4-3) and lower piston (31-4-4) are transparent hollow structure；
The interior lower end of the crossover sub (34) is provided with fixed valve (31-7)；Shut-in valve is equipped in the lower contact (31-10)
(31-8)；Travelling valve (31-9) is equipped in the upper piston (31-4-3)；
The reversal valve (31-6), which can slide up and down to, to be arranged between the commutation pipe nipple (31-5) and hollow connecting rod (31-4).
2. hydraulic piston pump according to claim 1, it is characterised in that:
Commutation of the reversal valve (31-6) between commutation pipe nipple (31-5) and hollow connecting rod (31-4) is intracavitary and will
The chamber radial separations that commutate are power sap cavity (31-5-1) and weary power sap cavity (31-5-2)；The top of commutation pipe nipple (31-5)
It is provided with and enters the power fluid that the power fluid flowed between pump seat (21) and pump core (31) imported into power sap cavity (31-5-1)
Mouth (31-5-3).
3. hydraulic piston pump according to claim 2, it is characterised in that:
The pump seat (21) includes outer cylinder (28), and the middle part of the outer cylinder (28) is equipped with outer cylinder circulation port (26)；The commutation chamber
Side wall be respectively arranged with from top to bottom the upper piston chamber inlet (31-5-4) being communicated in upper piston cylinder (31-2), be communicated to it is outer
The weary power fluid outlet (31-5-5) of cylinder circulation port (26), the lower piston chamber inlet (31- being communicated in lower piston cylinder (31-3)
5-6)；The middle part of the reversal valve (31-6) radially offers commutation mouth (31-6-1)；When the reversal valve (31-6) is located at it
When lower limit site, the upper piston chamber inlet (31-5-4) is directly connected with the power sap cavity (31-5-1), the weary power
Liquid outlet (31-5-5) and lower piston chamber inlet (31-5-6) are connected with weary power sap cavity (31-5-2) simultaneously；It is changed when described
When to valve (31-6) limit point disposed thereon, the lower piston chamber inlet (31-5-6) passes through commutation mouth (31-6-1) and described dynamic
Power sap cavity (31-5-1) conducting, the weary power fluid outlet (31-5-5) and upper piston chamber inlet (31-5-4) are moved with weary simultaneously
Power sap cavity (31-5-2) conducting；
It is close to hollow connecting rod (31-4) and is extended with spool (31-5-7) upwards in the bottom of the commutation chamber；The reversal valve (31-6)
Lower part insertion spool (31-5-7) with commutate pipe nipple (31-5) between；The bottom of the spool (31-5-7) and the commutation are short
Pressure transmission hole (31-5-8) is provided between section (31-5)；The middle part of the spool (31-5-7) towards the side hollow connecting rod (31-4)
It is provided with diversion trench (31-5-7-1)；The commutation pipe nipple (31-5) is provided with below the spool (31-5-7) and outer cylinder
The relief hole (31-5-9) of circulation port (26) connection；The upper portion side wall of the hollow connecting rod (31-4) is provided with reversing groove (31-4-
1), lower part is provided with a pair of adjacent lower reversing groove (31-4-2)；
When the hollow connecting rod (31-4) is located at its lower limit site location, the upper reversing groove (31-4-1) is simultaneously described in connection
Relief hole (31-5-9) and pressure transmission hole (31-5-8)；
It is convex between two lower reversing grooves (31-4-2) when the hollow connecting rod (31-4) limit point position disposed thereon
It is corresponding with the diversion trench (31-5-7-1) to play position, so that the pressure transmission hole (31-5-8) and the power sap cavity (31-
5-1) be connected.
4. hydraulic piston pump according to claim 3, it is characterised in that: be equipped with sliding sleeve (24) in the outer cylinder (28)；Institute
The top for stating sliding sleeve (24) is fixed with pawl (25)；The pump core (31) is externally provided with the pawl slot for blocking pawl (25)
(33)；Outer cylinder (28) inner wall is separately provided for blocking the pawl of opening above and below the sliding sleeve (24)
Top fastening station and it is used to support getting out of a predicament or an embarrassing situation for sliding sleeve (24) bottom end, offers sliding sleeve respectively on the sliding sleeve (24) and outer cylinder (28) and follow
Annular distance (27) and outer cylinder circulation port (26), the sliding sleeve circulation port (27) and outer cylinder circulation port (26) are located in the sliding sleeve (24)
It is staggered when alignment, dead-centre position disposed thereon when its lower dead point position.
5. a kind of underground pump assembly, it is characterised in that: including oil pipe (22), packer (23), hollow rod (32) and right
It is required that hydraulic piston pump described in 1 to 4 any one, the oil pipe (22), pump seat (21) and packer (23) form lower going-into-well
Working string (20) in setting of casing (10), the pump core (31) and hollow rod (32) group for being connected to pump core (31) top
At the drain tubing string (30) being lowered into working string (20)；The packer (23) is located at the lower section of the pump seat (21).
6. underground pump assembly according to claim 5, it is characterised in that: the bottom end of the pump core (31) is equipped with pressure gauge
(35)。
7. underground pump assembly according to claim 5 or 6, it is characterised in that: be provided with below the packer (23)
Sand-proof pipe.
8. underground pump assembly according to claim 5 or 6, it is characterised in that: the crossover sub (34) and pump seat (21)
It is tightly connected, the crossover sub (34) is for the power fluid for entering pump core (31) from hollow rod (32) to be imported into
The annular space being located at below crossover sub (34) between pump core (31) and pump seat (21) will simultaneously be extracted out out of pump core (31)
Formation fluid is drained into the annular space being located above crossover sub (34) between pump core (31) and pump seat (21).
9. a kind of underground drain test macro, which is characterized in that including the described in any item underground pump assemblys of claim 5 to 8,
Power fluid circulation (40) and formation fluid metering system；The power fluid circulation (40) includes toward the hollow rod
(32) the power fluid storage that water injecting pump (41), the annular chamber between casing (10) and oil pipe (22) of power fluid are connected to is provided in
Tank (42)；The formation fluid metering system includes the ground that the annular housing between hollow rod (32) and oil pipe (22) is connected to
Layer liquid holding vessel (51)；The water injecting pump (41) extracts power fluid out of described power fluid holding vessel (42).
10. drain test macro in underground according to claim 9, which is characterized in that the power fluid holding vessel (42) with
Water injecting pump is provided with heating device between (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820621717.1U CN208564927U (en) | 2018-04-27 | 2018-04-27 | Hydraulic piston pump, underground pump assembly and underground drain test macro |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820621717.1U CN208564927U (en) | 2018-04-27 | 2018-04-27 | Hydraulic piston pump, underground pump assembly and underground drain test macro |
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| CN208564927U true CN208564927U (en) | 2019-03-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443126A (en) * | 2018-04-27 | 2018-08-24 | 廊坊市华海石油技术开发有限公司 | System is tested in hydraulic piston pump, underground pump assembly and underground drain |
-
2018
- 2018-04-27 CN CN201820621717.1U patent/CN208564927U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443126A (en) * | 2018-04-27 | 2018-08-24 | 廊坊市华海石油技术开发有限公司 | System is tested in hydraulic piston pump, underground pump assembly and underground drain |
| CN108443126B (en) * | 2018-04-27 | 2024-02-23 | 廊坊市华海石油技术开发有限公司 | Hydraulic piston pump, underground pump unit and underground liquid discharge testing system |
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