CN106437605A - Packer - Google Patents
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- CN106437605A CN106437605A CN201610802750.XA CN201610802750A CN106437605A CN 106437605 A CN106437605 A CN 106437605A CN 201610802750 A CN201610802750 A CN 201610802750A CN 106437605 A CN106437605 A CN 106437605A
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- piston
- packer
- lock
- packing element
- oil
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
- E21B33/1277—Packers; Plugs with inflatable sleeve characterised by the construction or fixation of the sleeve
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- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Reciprocating Pumps (AREA)
- Processing Of Solid Wastes (AREA)
- Sealing Material Composition (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention provides a packer comprising a compression rubber sleeve and an expansion rubber sleeve arranged up-down outside a central pipe; the compression rubber sleeve can realize setting when fluid pressure rises in an oil pipe, and a holding structure is arranged so as to keep the setting state; the expansion rubber sleeve can realize setting when a flush fluid is injected into a hohlraum; the well flushing work can be carried out after the compression rubber sleeve is set and the flush fluid is injected into the hohlraum, so the flush fluid cannot enter an oil reservoir so as to protect the oil reservoir, and dual-setting can provide more reliable setting effect; in addition, the special hohlraum and unlocking structure are designed, and the holding structure can be unlocked when the flush fluid enters the hohlraum; once the flush fluid stops injecting, the compression rubber sleeve and expansion rubber sleeve can automatically rebound, i.e., the packer can be automatically unsealed when the well flushing is finished; extra operations like pulling up an oil pumping string are not needed, thus ensuring normal production of the oil well with no interruption while finishing the well flushing; the packer can be repeatedly used underground.
Description
Technical field
The present invention relates to a kind of packer.
Background technology
Oil well paraffinication is that there is a problem of for a long time in oilfield development process, when crude oil is extracted into ground from underground, due to molten
The solution effusion of gas and expansion and so that crude oil temperature is gradually lowered, the size order that molecular weight just press from crude oil by wax crystallizes and analyses
Go out, and be then deposited on tube inner wall, cause pit shaft to narrow, oil well output reduces, and also can block oil pipe and cause oil when serious
Well stops production.Hot-washing wax remover technology is using the flowing material after heating, such as water or oil etc., by hot fluid circulation in the wellbore
Delivering heat to wellbore fluids, improving the temperature of wellbore fluids so that after wax deposit fusing in being dissolved in crude oil, thus reaching wax removal
Purpose.
When carrying out hot-washing wax remover operation, cause oil layer pollution to prevent thermal washing liquid to be directly injected in oil reservoir, need
It is connected into packer, for shutting oil jacket annular space in oil pipe.Authorization Notice No. is CN203188969U, and authorized announcement date is
2013.09.11 Chinese utility model patent discloses a kind of hot-washing wax remover packer, including central canal, central canal upper
Portion periphery is provided with hydraulic cylinder, is provided with glue tube base and lock tube below upper hydraulic cylinder, the middle part periphery of central canal in glue tube base and
The lower section of lock tube is provided with some packing elements, is provided with upper and lower compensating cylinder, upper balance between the lower, outer perimeter of central canal and lower contact
Support bottom packing element on the upside of cylinder body, on the downside of lower balance cylinder block, be threaded with solution big envelope and lower contact periphery between, solve big envelope
It is provided with deblocking screw with lower contact periphery.
During use, the upside of packer top connection is sequentially connected flushing valve and pumping pipe string, and lower contact lower end is connected with list
To valve, screen casing and plug etc., with setting position under oil pick-up tube together lower going-into-well after well connects.This hot-washing wax remover packer
Operation principle be：After pressurization in central canal, fluid under pressure enters in upper hydraulic cylinder, and the pin that sets on upper hydraulic cylinder is cut
Disconnected, upper hydraulic cylinder is descending and promotes glue tube base and lock tube to move down, packing element is slightly compressed longitudinally, radially enlarged until by sleeve pipe with
The annular space of oil pipe is separated with oil reservoir and seals, when center overpressure reaches setting value, lock tube and center pipe outer wall
Pawl interlocking is stuck.In this process, the pressure balance conciliating big envelope on the downside of packing element is fallen by upper compensating cylinder and lower compensating cylinder, prevents
Only deblocking cut off in advance by deblocking screw.During reacting cycle hot-washing wax remover, thermal washing liquid enters oil well pump by the well-flushing passage of flushing valve,
Return to ground from pumping pipe string, in washing well process, packer will not voluntarily unseal, thus realizing hot-washing wax remover operation；When need
When wanting removing seal for packer, deblocking screw is made to cut off by being lifted up pumping pipe string, solution big envelope is separated with lower contact, and packing element promotes
Upper compensating cylinder and lower compensating cylinder move downward, and longitudinally elongation, radial contraction, thus releasing the sealing of oil jacket annular space, are realized to make packing element
Deblocking.
Although this packer achieves the separation of oil jacket annular space and oil reservoir it is therefore prevented that flushing fluid pollutes oilbearing stratum,
If be apply while oil pumping, while hot-washing wax remover occasion when, due to upper lifting pipe post removing seal for packer must be realized, therefore will be to taking out
Oily operation impacts, and causes the interruption normally producing.And the operation of upper lifting pipe post is more complicated, it is desirable to have corresponding manpower and
Material resources put into.In addition, the use of this packer has disposably, setting pin and deblocking screw once being cut off, just cannot
Recover again that is to say, that this packer can only be realized once setting and unsealing, if follow-up the carrying out with production, in oil pipe
Occur again during wax deposition section in addition it is also necessary to play out tubing string, re-replace and set pin and deblocking screw or re-replace packing
Device, packer can not be reused in down-hole, makes troubles to practical application.
Content of the invention
It is an object of the invention to provide a kind of packer, to solve in prior art packer when upper lifting pipe post unseals
The problem of the normal operation of pumping of impact.
In order to solve above-mentioned technical problem, the present invention adopts the following technical scheme that：
A kind of packer, including vertically extending central canal, central canal outer is vertically disposed with glue tube base and compression glue
Cylinder, packer is provided with and makes what compression packing element was compressed to realize to set to set structure when in oil pipe fluid pressure raises,
It is additionally provided with packer and make it keep setting the holding structure of state, described holding structure bag after compression packing element is realized setting
Include outside central canal with the lock ring setting the lock tube that structure is connected and centrally disposed pipe periphery, on lock tube and lock ring point
It is not provided with cusp to realize interlocking stuck lock tooth directed downwardly with cusp upward, the lower end of lock tube is connected with described glue tube base,
Lock tube, central canal, glue tube base and set between structure formation ring cavity, described lock ring is located in ring cavity, and lock tube offers confession
Flushing fluid in oil jacket annular space enters the flushing fluid inlet in ring cavity, and packer is additionally included in flushing fluid to be passed through by oil jacket annular space
Flushing fluid inlet realizes lock tube and the unlocking structure of lock ring unblock after entering in ring cavity.
Described unlocking structure include being arranged on lock ring for making gap that lock ring can be compressed and being arranged at center
Deblocking piston below lock ring outside pipe, deblocking piston is located in ring cavity, and the opposite end of deblocking piston and lock ring is provided with solution
Work in coordination so that the taper surface that compressed of lock ring during envelope piston stroking upward, deblocking piston has and passed through by oil jacket annular space in flushing fluid
Flushing fluid inlet after entering in ring cavity up so that lock ring and lock tube realize the solution lock-bit of unblock.
In described ring cavity, the top in lock ring is provided with spring, and lock ring has the support for being supported to spring
Face.
Described set the top inlet opening that structure includes on centrally disposed pipe and be arranged at that central canal is outer to be entered in top
Piston set on fluid apertures corresponding position, the upper end of described lock tube with above set piston and be connected, described on set piston and have and taking out
When oil pump normally produces, fluid makes balance position that compression packing element is not compressed and in oily intraluminal fluid after the entrance of top inlet opening
Break balance during body pressure rise and with realize setting, position is set to compression packing element pressure.
Described set the bottom inlet opening that structure also includes on centrally disposed pipe and be arranged at central canal outer in bottom
Inlet opening sets piston under corresponding position, described under set piston and there is when oil well pump normally produces fluid from bottom inlet opening
Make after entrance to set the holding position that piston is maintained at described balance position.
Under set the top of piston and be fixedly connected with glue tube base, under set and between piston and central canal, be provided with flushing fluid
Chamber, well-flushing sap cavity is connected with described ring cavity, the bottom of described compression packing element, under set the outside of piston and be provided with expansion packing element,
Expansion packing element and under set and between piston, be provided with expansion cavity, under set connection well-flushing sap cavity and expansion cavity offered on piston
First passes through mouth.
Under set be further opened with piston one connect with well-flushing sap cavity second pass through mouth, the bottom of packer is provided with
In packer setting with second stagger by mouth, in removing seal for packer with second by mouth centering realize compression packing element and
The through hole of the expansion quick resilience of packing element.
The beneficial effects of the present invention is：Flushing fluid in oil supplying sleeve annular space is offered on lock tube and enters the well-flushing in ring cavity
Liquid inlet, packer be additionally included in flushing fluid by oil jacket annular space by flushing fluid inlet enter ring cavity in after realize lock tube and
The unlocking structure of lock ring unblock, during use, packer relies on the rising of fluid pressure in oil pipe to realize setting, during well-flushing, oil jacket
High pressure flushing liquid is injected, flushing fluid just can be entered in ring cavity by flushing fluid inlet, so that unlocking structure is real in annular space
Existing lock tube and the unblock of lock ring.Because ring cavity is in lock tube, central canal, glue tube base and to set formation between structure, therefore
Flushing fluid in ring cavity can produce pressure to surrounding, on the one hand because lock tube and lock ring are unlocked, then in the pressure of flushing fluid
Under power effect, set the state that structure returns to before not setting, thus ready for the deblocking of compression packing element；Another
Aspect, glue tube base, under the pressure of flushing fluid acts on, continues to compression packing element pressure, such that it is able to make compression packing element keep setting
State.So also imply that, once flushing fluid stop injection, without pressure in ring cavity, compression packing element will automatic rebounding,
Thus injection flushing fluid can be stopped after the completion of well-flushing, packer just can unseal automatically it is not necessary to above be put forward oil pick-up tube
The extra operation such as post, therefore, ensure that while completing well-flushing the normal production of oil well is not interrupted.
Brief description
Fig. 1 is the use principle figure of packer in the present invention；
Fig. 2 is the structure chart of packer in the present invention.
In figure：1. top connection；2. on, set piston；3. central canal；4. spring；5. lock tube；6. lock ring；7. flushing fluid feed liquor
Mouthful；8. unseal piston；9. connected entrance；10. glue tube base；11. compression packing elements；12. expansion packing elements；Piston is set under 13.；Under 14.
Joint；15. top inlet openings；16. middle part inlet openings；17. bottom inlet openings；18. oil jacket annular spaces；19. oil pipes；20. well-flushings are opened
Close；21. packers；22. sleeve pipes；23. oil well pumps；24. screen casings；25. plugs；26. wax deposition sections；27. oil reservoirs；28. first pass through
Mouthful；29 gaps；30. inner conical surfaces；31. male cone (strobilus masculinus)s；32. second pass through mouth；33. through holes.
Specific embodiment
In the present invention, for example shown in Fig. 1 ~ Fig. 2, this packer is to be used for during a kind of hot-washing wax remover operation for the enforcement of packer
Packing oil jacket annular space and the packer 21 of oil reservoir, during use, packer 21 is connected to below the wax deposition section 26 of oil pipe 19, packer
21 upper end is connected with well washing switch 20, and the bottom of oil pipe 19 is connected with oil well pump 23, and the bottom of oil well pump 23 is linked in sequence and has
Screen casing 24 and plug 25.
Packer 21 includes vertically extending central canal 3, and packer is provided with fluid pressure in oil pipe 19
What during rising, realization set sets structure, and in this embodiment, in oil pipe 19, fluid pressure raises is to be produced by turning down well head
Gate, the mode of raising oil pipe inner fluid pressure are realized, and build the pressure in oil pipe.The described structure that sets includes centrally disposed pipe
Top inlet opening 15 on 3 and be arranged at that central canal 3 is outer to set piston 2 on top inlet opening 15 corresponding position, above sets
The internal diameter of piston 2 is the different diameter of up big and down small two, respectively equipped with two sealing rings in two diameters, above sets piston 2
It is formed with plunger shaft one and central canal 3 between, described top inlet opening 15 is located between upper-lower seal circle and is connected with plunger shaft one
Logical.The upper end of lock tube 5 is fixedly connected with above setting piston 2, and the lower section of lock tube 5 is provided with glue tube base 10, and glue tube base 10 is L-shaped, L
The vertical edge of type glue tube base 10 is located at the inner side of lock tube 5, and its horizontal sides and lock tube 5 block coordinate, for limiting lock tube 5 to moving down
Dynamic moving limit, lock tube 5, central canal 3, on set piston 2 and glue tube base 10 and constitute ring cavity.
The lower section of glue tube base 10 is provided with compression packing element 11, described on set piston 2 and have when oil well pump normally produces
Fluid makes balance position that compression packing element 11 is not compressed after top inlet opening 15 enters plunger shaft one and builds the pressure in oil pipe
When break balance and to compression packing element 11 press with realize set set position.The described structure that sets also includes centrally disposed pipe
Bottom inlet opening 17 on 3 and be arranged at that central canal 3 is outer to set piston 13 under bottom inlet opening 17 corresponding position, under set
Piston 13 is the longer round body of a length, and threadeded with the vertical edge of glue tube base 10 in its upper end, its lower end is entered positioned at bottom
Form sealing above the top of fluid apertures 17, and sealing ring is provided with the inner headed face of lower end, with bottom inlet opening 17.Center
The outer lower thread in bottom inlet opening 17 of pipe 3 is connected with lower contact 14, under set and be formed between piston 13 and lower contact 14
Plunger shaft two, bottom inlet opening 17 is connected with plunger shaft two, described under set piston 13 there is when oil well pump normally produces oil
Liquid enters from bottom inlet opening 17 and makes to set the holding position that piston 2 is maintained at described balance position after plunger shaft two.Central canal 3
Threaded upper ends are connected with top connection 1, and packer passes through top connection 1 and lower contact 14 string is located in oil pipe.
Packer is additionally included in the holding structure keeping it in the state of setting after compression packing element 11 is realized setting, described guarantor
Hold structure and include lock tube 5 and the lock ring 6 being fixedly installed on central canal periphery, lock ring 6 is located in ring cavity, on lock tube 5 and lock ring 6
It is respectively arranged with cusp to realize interlocking stuck lock tooth directed downwardly with cusp upward.In described ring cavity, the top in lock ring 6 sets
It is equipped with spring 4, lock ring 6 has the supporting surface for being supported to spring 4, this supporting surface is the upper surface of lock ring 6, bullet
Spring 4 makes its lower end withstand on the supporting surface of lock ring 6 and be in its pre-compressed state after mounting.
The flushing fluid inlet 7 that flushing fluid in oil supplying sleeve annular space enters in ring cavity is offered on lock tube 5, packer also wraps
Include the unblock knot realizing that after flushing fluid is entered in ring cavity by flushing fluid inlet 7 by oil jacket annular space lock tube 5 and lock ring 6 unlock
Structure.Described unlocking structure include being arranged on lock ring 6 for making gap 29 that lock ring 6 can be compressed and being arranged at central canal
The deblocking piston 8 positioned at lock ring 6 lower section outside 3, deblocking piston 8 is located in ring cavity, and deblocking piston 8 has in flushing fluid by oil jacket
Annular space after being entered in ring cavity by flushing fluid inlet 7 up so that lock ring 6 and lock tube 5 realize the solution lock-bit of unblock.Deblocking is lived
The opposite end of plug 8 and lock ring 6 be respectively arranged with unseal piston 8 up when work in coordination so that the inner conical surface that compressed of lock ring 6
30 and male cone (strobilus masculinus) 31, after gap 29 is compressed, the external diameter of lock ring 6 diminishes, the lock tooth between lock tube 5 and lock ring 6 release stuck,
Thus realizing unlocking.The internal diameter of deblocking piston 8 is the different diameter of up big and down small two, between deblocking piston 8 and central canal 3
It is formed with plunger shaft three, deblocking piston 8 and the binding face up and down of central canal 3 are provided with sealing ring, central canal 3 offers
And the middle part inlet opening 16 between upper-lower seal circle of plunger shaft tee joint.
Under set and between piston 13 and central canal 3, be provided with well-flushing sap cavity, well-flushing sap cavity is connected with described ring cavity, under set
The upper end of piston 13 is provided with connected entrance 9, the bottom of described compression packing element 11, under set the outside of piston 13 and be provided with expansion glue
Cylinder 12, expansion packing element 12 and under set and be provided with expansion cavity between piston 13, under set connection flushing fluid offered on piston 13
The first of chamber and expansion cavity passes through mouth 28.
In the present invention, the operation principle of packer is：During normal production, oil well pump 23 works, and oily liquid in pipe passes through packing
The top inlet opening 15 of device enters in plunger shaft one, and fluid applies downward active force to above setting piston 2, above sets piston 2
Lock tube 5 is driven to have the trend moving downward, meanwhile, oily liquid in pipe enters plunger shaft two by the bottom inlet opening 17 of packer
In, fluid under set the active force that piston 13 applies upwards.In this process, above set the downward work suffered by piston 2
Firmly be equal to down and set active force upwards suffered by piston 13 and add spring 4 elastic force sum upwards, therefore on set piston 2
Be in balance position, under set piston 13 and be in holding position, compression packing element 11 is uncompressed, and that is, packer is in unset state.This
When oil jacket annular space 18 between oil pipe 19 and sleeve pipe 22 connect with oil reservoir 27, can normally be surveyed the techniques such as liquid level.
When producing a period of time, due to being affected by factors such as temperature, the inwall of oil pipe 19 can form wax deposition section 26, root
Find according to actual production, this wax deposition section 26 is typically incorporated in more than at 800 meters of well depths, therefore removes packer with tubing string one
Enter in well, packer is connected directly between below the wax deposition section of oil pipe.Wax deposition section 26 will affect oily well yield, now after being formed
Need to carry out the operation of hot-washing wax remover, turn down well head first and produce gate, improve oil pipe inner fluid pressure, realize suppressing in oil pipe
Pressure, at this moment fluid act on and set downward active force on piston 2 and will set on piston 13 upwards more than acting on down
Active force adds spring 4 elastic force sum upwards, above sets piston 2 and lock tube 5 will be promoted to move downward.The lower end top of lock tube 5
In the horizontal sides of glue tube base 10, when lock tube 5 continues to move downward, compression packing element 11 is compressed, and packer is in and sets shape
State, thus insulate oil jacket annular space 18.When lock tube 5 moves downward to a certain extent, the lock tooth on lock tube 5 and lock ring 6 mutually blocks
Button, realizes locked, thus preventing next step oil overpressure from compressing packing element 11 resilience after laying down, so that packer is maintained at and setting shape
State.In this process, fluid enters plunger shaft three from middle part inlet opening 16, and promotes deblocking piston 8 descending, deblocking simultaneously
Piston 8 is maintained a certain distance with lock ring 6, prevents deblocking piston 8 compression lock ring 6 from so that lock tube 5 and lock ring 6 is unlocked.
After compression packing element 11 sets, open well head and produce gate, keep normal and produce.Then in oil jacket annular space 18
Injection thermal washing liquid is flushing fluid, is opening before well washing switch 20 makes flushing fluid enter the wax deposition section 26 of oil pipe, flushing fluid can be first
First pass through the flushing fluid inlet 7 on packer and enter in ring cavity, high pressure flushing liquid is applied to glue tube base 10 after entering in ring cavity
Plus downward active force, make compression packing element 11 continue holding and set state, and make down to set piston 13 and be maintained at lower dead point position
Motionless.Meanwhile, flushing fluid enters in well-flushing sap cavity by connected entrance 9, and the flushing fluid in well-flushing sap cavity is entered using by mouth 28 again
Enter in expansion cavity, under the pressure of flushing fluid acts on, expansion packing element 12 is expanded and achieved and sets, it is achieved thereby that packer
The dual isolation setting, further enhancing oil jacket annular space, prevents flushing fluid polluted reservoir.In this process, ring cavity simultaneously
In flushing fluid also act against on deblocking piston 8 and make deblocking piston 8 up, when inner conical surface 30 and the lock ring 6 of deblocking piston 8
After male cone (strobilus masculinus) 31 cooperation, in the presence of deblocking piston 8, the gap 29 on lock ring 6 is compressed, and the external diameter of lock ring 6 diminishes, lock tube
Lock tooth releasing between 5 and lock ring 6 is stuck, and lock tube 5 and lock ring 6 realize unblock.Meanwhile, flushing fluid also reach upper in ring cavity
Portion, and to above setting the active force that piston 2 applies upwards, after lock tube 5 and lock ring 6 unlock, in spring 4 and well-flushing hydraulic coupling
Under dual function, above set piston 2 and drive lock tube 5 up, final on to set piston 2, lock tube 5, lock ring 6 and spring 4 all extensive
Arrive original position again, be after lower step well-flushing pressure is laid down compression packing element 11 and expansion packing element 12 unseal ready.
After compression packing element 11 and expansion packing element 12 realize double-sealing, open the well washing switch 20 on packer top, this
When flushing fluid by well washing switch 20 enter oil pipe 19 wax deposition section 26 in, thus carrying out the operation of hot-washing wax remover.Due to well-flushing
Liquid is directly entered wax deposition section, compares when packer is connected in oil pipe bottom, and flushing fluid is got to without by long pipeline
Seldom, heat energy is fully utilized, and improves the effect of hot-washing wax remover, and well-flushing liquid measure used is few, hot for wax deposition section, therefore heat loss
Wash down wax efficiency high.Packer relies on to build the pressure to achieve in advance in oil pipe and sets simultaneously, when flushing fluid injection oil jacket annular space, no
Have any flushing fluid to enter in oil reservoir it is achieved that no pollution, protect oil reservoir.
After the completion of hot-washing wax remover, stop injection flushing fluid, at this moment act on glue tube base 10 and under set piston 13 top
Distress resolves, and act on down set piston 13 bottom oily overpressure be more than oil jacket annular space in pressure, under set work
Plug 13 will promote glue tube base 10 up, thus discharge compression packing element 11 to realize automatically unsealing with expansion packing element 12, oil jacket annular space is again
Return to before well-flushing with oil reservoir connected state.In this process, quick for the ease of compression packing element 11 and expansion packing element 12
Resilience, under set the bottom of piston 13 and be additionally provided with second connecting with well-flushing sap cavity and pass through mouth 32, and in packer
Bottom be provided with the through hole 33 connecting with second by mouth 32, when packer is in and sets state, due under set piston
13 is descending, and second passes through mouth 32 and through hole 33 staggers, when flushing fluid stops injection packer and will unseal, under set piston
13 is up, and second passes through mouth 32 and through hole 33 just centering, and the therefore a part of flushing fluid in well-flushing sap cavity can also be from second
Packer is discharged by mouth 32 and through hole 33, so that two-way pressure quickly restores balance in packer, realizes compression packing element 11
With the expansion quick resilience of packing element 12.
During whole injection flushing fluid carries out hot-washing wax remover, no matter being to set expansion packing element 12 further, or
Compression packing element 11 and expansion packing element 12 unseal simultaneously, and oil well pump 23 remains normal production, will not cause shadow to oil pumping operation
Ring.That is, after the completion of hot-washing wax remover operation, flushing fluid once stops injecting, compression packing element 11 and expansion packing element 12 are just
Automatically can unseal it is not necessary to above be proposed the extra operation such as pumping pipe string simultaneously, therefore, protect while completing hot-washing wax remover
The normal production having demonstrate,proved oil well is not interrupted.And this deblocking mode is more convenient, it is quick on the draw it is not necessary to man power and material
Put into, the deblocking time is short.
In addition, poised state before packer setting i.e. on to set the balance position of piston be that set piston auxiliary by down real
Existing, when in oil pipe, fluid pressure raises, above set piston just descending to compression packing element pressure, upper and lower set piston with
All it is not provided between heart pipe cutting off pin.When flushing fluid is after oil jacket annular space enters ring cavity, deblocking piston stroking upward pressured contracting lock
The mode of ring makes lock ring and lock tube unblock, subsequently on set piston, lock tube, lock ring and spring and all return to original state,
Therefore when flushing fluid stops injection, after compression packing element and expansion packing element resilience, before packer is completely recovered to not build the pressure in oil pipe
State that is to say, that packer can be reused, so when the later stage with produce carrying out, in oil pipe again occur knot
During wax section, directly can greatly facilitate oil pick-up tube it is not necessary to tubing string is played out replacing part according to above step repetitive operation
Post and the application of packer.
Certainly, in the present embodiment, the structure of packer equally can also apply the occasion in reacting cycle well-flushing, equally permissible
Reach flushing fluid and stop the effect that injection can unseal automatically.
In the other embodiment of packer：In oil pipe, fluid pressure rising can also be by way of suppressing into oil pipe
Realize；Spring can be not provided with ring cavity, when above setting piston and being in balance position, the fluid active force downward to above setting piston
Be equal to under set piston active force upwards；Under set and can be not provided with second on piston and pass through mouth, and only one of which first
By mouth；Under set piston outside can be not provided with expand packing element, packer rely only on compression packing element realize set, now
Thermal washing sap cavity, only one of which ring cavity need not be set again；Set structure can not include bottom inlet opening and under set work
Plug, at this moment can set between piston and central canal setting and cut off pin upper, when oil well pump normally produces, enter plunger shaft
Fluid in one is insufficient to allow to be cut off pin and cuts off, above set piston be in balance position will not be descending, when fluid pressure in oil pipe
During rising, cut off pin and cut off, balance is broken, above set descent of piston and compression packing element is pressed to realize setting, now
On set piston and be in and set position；Unlocking structure can not include unseal piston, unlocking structure can be provided in lock ring with
Pin is cut off, when lock tube and lock ring are locked, the resilience force of compression packing element is insufficient to allow to be cut off pin and cut off between heart pipe, from
And compression packing element can be made to keep setting state, and after high pressure flushing liquid enters in ring cavity, flushing fluid work upwards to lock ring
Firmly make to cut off pin and cut off, lock tube is unlocked with lock ring.
Claims (7)
1. a kind of packer, including vertically extending central canal, central canal outer is vertically disposed with glue tube base and compression
Packing element, packer is provided with and makes what compression packing element was compressed to realize to set to set knot when in oil pipe fluid pressure raises
Structure, packer is additionally provided with compression packing element realize set after make it keep setting the holding structure of state it is characterised in that：
Described holding structure include outside central canal with the lock ring setting the lock tube that structure is connected and centrally disposed pipe periphery,
Cusp to realize interlocking stuck lock tooth, the lower end of lock tube and institute directed downwardly with cusp upward is respectively arranged with lock tube and lock ring
State glue tube base to be connected, lock tube, central canal, glue tube base and set between structure formation ring cavity, described lock ring is located in ring cavity, lock
Put offer in oil supplying sleeve annular space flushing fluid enter ring cavity in flushing fluid inlet, packer be additionally included in flushing fluid by
Oil jacket annular space realizes lock tube and the unlocking structure of lock ring unblock by flushing fluid inlet after entering in ring cavity.
2. packer according to claim 1 it is characterised in that：Described unlocking structure includes being arranged at being used on lock ring
Make gap that lock ring can be compressed and be arranged at outside central canal lock ring below deblocking piston, deblocking piston is located at ring cavity
In, the opposite end of deblocking piston and lock ring is provided with when unsealing piston stroking upward works in coordination so that the taper compressed of lock ring
Face, deblocking piston have after flushing fluid is entered in ring cavity by flushing fluid inlet by oil jacket annular space up so that lock ring and lock
The solution lock-bit of unblock realized by set.
3. packer according to claim 1 and 2 it is characterised in that：In described ring cavity, the top in lock ring is provided with bullet
Spring, lock ring has the supporting surface for being supported to spring.
4. packer according to claim 1 and 2 it is characterised in that：The described structure that sets is included on centrally disposed pipe
Top inlet opening and be arranged at that central canal is outer to set piston on the inlet opening corresponding position of top, the upper end of described lock tube with
On set piston and be connected, described on set piston there is when oil well pump normally produces fluid and make pressure after the entrance of top inlet opening
Balance position that contracting packing element is not compressed and in oil pipe fluid pressure break balance when raising and compression packing element pressed with reality
Now set sets position.
5. packer according to claim 4 it is characterised in that：The described structure that sets also is included on centrally disposed pipe
Bottom inlet opening and be arranged at that central canal is outer to set piston under the inlet opening corresponding position of bottom, described under set piston and have
When oil well pump normally produces, fluid makes to set the holding position that piston is maintained at described balance position after the entrance of bottom inlet opening.
6. packer according to claim 5 it is characterised in that：Under set the top of piston and be fixedly connected with glue tube base,
Under set and between piston and central canal, be provided with well-flushing sap cavity, well-flushing sap cavity is connected with described ring cavity, under described compression packing element
Portion, under set the outside of piston and be provided with expansion packing element, expansion packing element and under set and be provided with expansion cavity between piston, under set
Connection well-flushing sap cavity and the first of expansion cavity is offered on piston and passes through mouth.
7. packer according to claim 6 it is characterised in that：Under set be further opened with piston one with well-flushing sap cavity
The second of connection passes through mouth, and the bottom of packer is provided with is staggered by mouth, in packer solution with second in packer setting
Feng Shiyu second realizes compressing the through hole of packing element and the expansion quick resilience of packing element by mouth centering.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811485066.9A CN109751009B (en) | 2016-09-06 | 2016-09-06 | Repeated hot-washing paraffin removal packer |
| CN201610802750.XA CN106437605B (en) | 2016-09-06 | 2016-09-06 | A kind of packer |
| CN201811485067.3A CN109751011B (en) | 2016-09-06 | 2016-09-06 | Hot-washing paraffin removal packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610802750.XA CN106437605B (en) | 2016-09-06 | 2016-09-06 | A kind of packer |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811485067.3A Division CN109751011B (en) | 2016-09-06 | 2016-09-06 | Hot-washing paraffin removal packer |
| CN201811485066.9A Division CN109751009B (en) | 2016-09-06 | 2016-09-06 | Repeated hot-washing paraffin removal packer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106437605A true CN106437605A (en) | 2017-02-22 |
| CN106437605B CN106437605B (en) | 2018-12-14 |
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Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610802750.XA Active CN106437605B (en) | 2016-09-06 | 2016-09-06 | A kind of packer |
| CN201811485066.9A Active CN109751009B (en) | 2016-09-06 | 2016-09-06 | Repeated hot-washing paraffin removal packer |
| CN201811485067.3A Active CN109751011B (en) | 2016-09-06 | 2016-09-06 | Hot-washing paraffin removal packer |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811485066.9A Active CN109751009B (en) | 2016-09-06 | 2016-09-06 | Repeated hot-washing paraffin removal packer |
| CN201811485067.3A Active CN109751011B (en) | 2016-09-06 | 2016-09-06 | Hot-washing paraffin removal packer |
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| CN108414199A (en) * | 2017-12-29 | 2018-08-17 | 中国海洋石油集团有限公司 | Visualize the performance testing device of packing element |
| CN109779563A (en) * | 2019-03-25 | 2019-05-21 | 天津五一机电设备有限公司 | Prevent the combined type oil well pump of well-flushing polluted reservoir |
| CN111535775A (en) * | 2020-05-21 | 2020-08-14 | 济南鸿泰华丰机械有限公司 | Adjustable constant pressure washable well packer |
| CN113445955A (en) * | 2021-08-09 | 2021-09-28 | 湖北福瑞得能源科技有限公司 | Multifunctional intelligent oil well hot washing stratum protector and working method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111997563B (en) * | 2020-08-04 | 2022-06-24 | 中国石油化工股份有限公司 | Pump-sealing integrated water finding and blocking pipe column and moving bottom block thereof |
| CN113090222B (en) * | 2021-05-14 | 2021-09-24 | 大庆市晟威机械制造有限公司 | Oil field is packer in pit |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109751009A (en) | 2019-05-14 |
| CN106437605B (en) | 2018-12-14 |
| CN109751011A (en) | 2019-05-14 |
| CN109751009B (en) | 2021-02-12 |
| CN109751011B (en) | 2021-02-12 |
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