CN106437605B - A kind of packer - Google Patents
A kind of packer Download PDFInfo
- Publication number
- CN106437605B CN106437605B CN201610802750.XA CN201610802750A CN106437605B CN 106437605 B CN106437605 B CN 106437605B CN 201610802750 A CN201610802750 A CN 201610802750A CN 106437605 B CN106437605 B CN 106437605B
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- Prior art keywords
- piston
- packing element
- packer
- lock
- oil
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- 238000011010 flushing procedure Methods 0.000 claims abstract description 92
- 239000012530 fluid Substances 0.000 claims abstract description 79
- 238000012856 packing Methods 0.000 claims abstract description 75
- 230000006835 compression Effects 0.000 claims abstract description 34
- 238000007906 compression Methods 0.000 claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 239000003129 oil well Substances 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims description 24
- 239000003292 glue Substances 0.000 claims description 2
- 238000002347 injection Methods 0.000 abstract description 9
- 239000007924 injection Substances 0.000 abstract description 9
- 238000005086 pumping Methods 0.000 abstract description 9
- 238000007789 sealing Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 230000002457 bidirectional effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 79
- 238000005406 washing Methods 0.000 description 20
- 230000008021 deposition Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 239000010779 crude oil Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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)
- Processing Of Solid Wastes (AREA)
- Reciprocating Pumps (AREA)
- Sealing Material Composition (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention provides a kind of packers; including the compression packing element and expansion packing element outside vertically centrally disposed pipe; wherein compression packing element is to realize to set when fluid pressure increases in oil pipe; and it is equipped with and structure is kept to keep it in the state of setting; and expanding packing element is to realize to set afterwards in the air in flushing fluid injection ring; thus flushing fluid can be injected into annular space again after compression packing element is set carry out clean-out service; flushing fluid will not enter in oil reservoir; protect oil reservoir, at the same double-sealing can guarantee to set effect it is relatively reliable.In addition unique ring cavity design and unlocking structure can make to keep structure unlock after flushing fluid is entered in ring cavity in the present invention, once flushing fluid stops injection, it compresses packing element and expansion packing element will automatic rebounding, i.e. packer can realize automatic deblocking after the completion of well-flushing, it does not need to mention the operation bidirectionals such as pumping pipe string, it ensure that the normal production of oil well is not interrupted while completing well-flushing, while packer of the invention can also be reused in underground.
Description
Technical field
The present invention relates to a kind of packers.
Background technique
Oil well paraffinication is there are problems that in oilfield development process for a long time, when crude oil is extracted into ground from underground, due to molten
Solve gas evolution and expansion and gradually decrease crude oil temperature, wax just from crude oil by molecular weight size order crystallization analyse
Out, and then it is deposited on tube inner wall, pit shaft is caused to narrow, oil well output reduces, and oil pipe can be also blocked when serious and causes oil
Well stops production.Hot-washing wax remover technology is to pass through the circulation of hot fluid in the wellbore using the flowing material after heating, such as water or oil
Wellbore fluids are delivered heat to, the temperature of wellbore fluids is improved, so that after wax deposit fusing in being dissolved in crude oil, to reach wax removal
Purpose.
When carrying out hot-washing wax remover operation, hot wash liquid, which is directly injected into oil reservoir, in order to prevent causes oil layer pollution, needs
Packer is connected into oil pipe, for shutting oil jacket annulus.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 tube, central tube it is upper
Portion periphery is equipped with upper hydraulic cylinder, is provided with rubber tube seat and lock tube below upper hydraulic cylinder, the middle part periphery of central tube in rubber tube seat and
It is provided with several packing elements below lock tube, upper and lower compensating cylinder, upper balance are provided between the lower, outer perimeter and lower contact of central tube
Bottom packing element is supported on the upside of cylinder body, is threaded with solution big envelope between lower contact periphery on the downside of lower balance cylinder block, is solved big envelope
Deblocking screw is equipped with lower contact periphery.
In use, being sequentially connected flushing valve and pumping pipe string on the upside of packer top connection, lower contact lower end is connected with list
To valve, screen casing and silk plug etc., after being connected on well together with oil pick-up tube setting position under lower going-into-well.The hot-washing wax remover packer
Working principle be: in central tube after pressurization, fluid under pressure enters in upper hydraulic cylinder, and the pin that sets on upper hydraulic cylinder is cut
Disconnected, upper hydraulic cylinder downlink simultaneously pushes rubber tube seat and lock tube to move down, packing element is slightly compressed longitudinally, it is radially enlarged until by casing with
The annular space of oil pipe separates and seals with oil reservoir, when center, overpressure reaches setting value, lock tube and center pipe outer wall
Pawl interlocking is stuck.In this process, upper compensating cylinder and lower compensating cylinder fall the pressure balance of reconciliation big envelope on the downside of packing element, prevent
Only deblocking screw cuts deblocking in advance.When reacting cycle hot-washing wax remover, hot wash liquid enters oil well pump by the well-flushing passage of flushing valve,
Ground is returned to from pumping pipe string, in washing well process, packer will not be unsealed voluntarily, to realize hot-washing wax remover operation；When need
When wanting removing seal for packer, make to unseal screw cutting by being lifted up pumping pipe string, solution big envelope is separated with lower contact, and packing element pushes
Upper compensating cylinder and lower compensating cylinder move downward, and make packing element longitudinal elongation, radial contraction to release the sealing of oil jacket annulus, realize
Deblocking.
Although this packer realizes the separation of oil jacket annulus and oil reservoir, it is therefore prevented that and flushing fluid pollutes oilbearing stratum, but
If be apply while oil pumping, while hot-washing wax remover occasion when, due to must upper lifting pipe post realize removing seal for packer, will be to pumping
Oily operation impacts, and causes the interruption normally produced.And the operation of upper lifting pipe post is more complicated, need corresponding manpower and
Material resources investment.In addition, the use of this packer has disposably, pin and deblocking screw are set once being cut, just can not
Restore again, that is to say, that this packer, which can only be realized, once to be set and unseal, if the subsequent progress with production, in oil pipe
When occurring wax deposition section again, it is also necessary to rise by tubing string, re-replace and set pin and deblocking screw or re-replace packing
Device, packer cannot be reused in underground, be made troubles to practical application.
Summary of the invention
The purpose of the present invention is to provide a kind of packer, with solve in the prior art packer when upper lifting pipe post unseals
The problem of influencing normal oil pumping operation.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme:
A kind of packer, including the central tube vertically extended, central tube outer is vertically disposed with rubber tube seat and pressure
Contracting packing element, being provided on packer when fluid pressure increases in oil pipe, which makes to compress packing element, is compressed to realize that is set sets knot
Structure, the holding structure for making its holding set state after compression packing element is realized and set is additionally provided on packer, and holdings is tied
Structure include outside the central tube with the lock ring that sets lock tube and centrally disposed pipe periphery that structure is connected, lock tube and lock ring
On be respectively arranged with cusp upward with cusp is directed downwardly interlocks stuck lock tooth, the lower end of lock tube and the rubber tube seat phase to realize
Even, it lock tube, central tube, rubber tube seat and sets and forms ring cavity between structure, the lock ring is located in ring cavity, offers on lock tube
Flushing fluid in oil supplying sleeve annular space enters the flushing fluid inlet in ring cavity, and packer further includes being led in flushing fluid by oil jacket annulus
Cross the unlocking structure that lock tube and lock ring unlock are realized after flushing fluid inlet enters in ring cavity.
The unlocking structure includes the gap for can be compressed lock ring being set on lock ring and is set to center
Deblocking piston below lock ring outside pipe, deblocking piston are located in ring cavity, and the opposite end of deblocking piston and lock ring, which is provided with, to be solved
It is worked in coordination when sealing piston stroking upward so that the compressed tapered surface of lock ring, deblocking piston, which has, to be passed through in flushing fluid by oil jacket annulus
Uplink after flushing fluid inlet enters in ring cavity is so that lock ring and lock tube realize the solution lock-bit of unlock.
Spring is provided in the ring cavity above lock ring, there is the support for being supported to spring on lock ring
Face.
It is described set structure include top inlet opening on centrally disposed pipe and be set to central tube it is outer in top into
Set piston on fluid apertures corresponding position, the upper end of the lock tube with above set piston and be connected, it is described on set piston and have and taking out
Oil liquid makes to compress the balance position that is not compressed of packing element and in oily intraluminal fluid after the entrance of top inlet opening oil pump during normal production
Break balance when body pressure rise and to compression packing element pressure to realize that is set sets position.
It is described to set that structure further includes lower part inlet opening on centrally disposed pipe and to be set to central tube outer in lower part
Piston is set under inlet opening corresponding position, set under described piston have oil well pump during normal production oil liquid from lower part inlet opening
The holding position that piston is maintained at the balance position is set on making after.
Under set the top of piston and be fixedly connected with rubber tube seat, under set and be provided with flushing fluid between piston and central tube
Chamber, well-flushing sap cavity are connected to the ring cavity, the lower part of the compression packing element, 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 and offer connection well-flushing sap cavity and expansion cavity on piston
First passes through mouth.
Under set be also provided on piston one be connected to well-flushing sap cavity second by mouth, the lower part of packer is provided with
Be staggered with second by mouth in packer setting, in removing seal for packer with second by mouth in realizes compress packing element and
The through-hole that expansion packing element is quickly sprung back.
The beneficial effects of the present invention are: the well-flushing that the flushing fluid in oil supplying sleeve annular space enters in ring cavity is offered on lock tube
Liquid inlet, packer further include realized after flushing fluid is entered in ring cavity by oil jacket annulus by flushing fluid inlet lock tube and
The unlocking structure of lock ring unlock, in use, packer is set by the raising realization of fluid pressure in oil pipe, when well-flushing, oil jacket
High pressure flushing liquid is injected in annular space, flushing fluid can be entered in ring cavity by flushing fluid inlet, to keep unlocking structure real
The unlock of existing lock tube and lock ring.Since ring cavity is formed between structure in lock tube, central tube, rubber tube seat and setting,
Flushing fluid in ring cavity can generate pressure to surrounding, on the one hand since lock tube and lock ring are unlocked, then in the pressure of flushing fluid
It under power effect, sets structure and returns to state before not setting, so that the deblocking for compression packing element is ready；It is another
Aspect, rubber tube seat continue to compression packing element pressure, under the pressure effect of flushing fluid so as to so that compression packing element holding is set
State.Also mean that in this way, once flushing fluid stops injection, without pressure in ring cavity, compress packing element will automatic rebounding,
Thus it can stop injection flushing fluid after the completion of well-flushing, packer can unseal automatically, not need to be proposed oil pick-up tube
Therefore the additional operation such as column ensure that the normal production of oil well is not interrupted while completing well-flushing.
Detailed description of the invention
Fig. 1 is the use schematic diagram of packer in the present invention；
Fig. 2 is the structure chart of packer in the present invention.
In figure: 1. top connections；2. piston is set on；3. central tube；4. spring；5. lock tube；6. lock ring；7. flushing fluid feed liquor
Mouthful；8. unsealing piston；9. communication port；10. rubber tube seat；11. compressing packing element；12. expanding packing element；13. piston is set under；Under 14.
Connector；15. top inlet opening；16. middle part inlet opening；17. lower part inlet opening；18. oil jacket annulus；19. oil pipe；20. well-flushing is opened
It closes；21. packer；22. casing；23. oil well pump；24. screen casing；25. silk plug；26. wax deposition section；27. oil reservoir；28. first passes through
Mouthful；29 gaps；30. inner conical surface；31. male cone (strobilus masculinus)；32. second passes through mouth；33. through-hole.
Specific embodiment
For example shown in Fig. 1 ~ Fig. 2, which is used for when being a kind of hot-washing wax remover operation for the implementation of packer in the present invention
The packer 21 of oil jacket annulus and oil reservoir is insulated, in use, packer 21 is connected to 26 lower section of wax deposition section 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 silk plug 25.
Packer 21 includes the central tube 3 vertically extended, is provided with the fluid pressure in oil pipe 19 on packer
Realize that is set sets structure when raising, in this embodiment, fluid pressure raising is by turning down well head production in oil pipe 19
What gate, the mode for improving oil pipe inner fluid pressure were realized, i.e., it builds the pressure in oil pipe.The structure that sets includes centrally disposed pipe
Top inlet opening 15 on 3 and to be set to central tube 3 outer in setting piston 2 on 15 corresponding position of top inlet opening, above sets
The internal diameter of piston 2 is two up big and down small different diameters, and respectively there are two sealing rings for dress in two diameters, above sets piston 2
Plunger shaft one is formed between central tube 3, the top inlet opening 15 connects between upper-lower seal circle and with plunger shaft one
It is logical.The upper end of lock tube 5 is fixedly connected with piston 2 is above set, and the lower section of lock tube 5 is provided with rubber tube seat 10, and rubber tube seat 10 is L-shaped, L
The vertical edge of type rubber tube seat 10 is located at the inside of lock tube 5, and horizontal sides and 5 block of lock tube cooperate, for limiting lock tube 5 to moving down
Dynamic moving limit, lock tube 5, central tube 3, on set piston 2 and rubber tube seat 10 and constitute ring cavity.
The lower section of rubber tube seat 10 be provided with compression packing element 11, it is described on set piston 2 have oil well pump during normal production
Oil liquid enters after plunger shaft one balance position and build the pressure in oil pipe for making to compress that packing element 11 is not compressed from top inlet opening 15
When break balance and to compression packing element 11 pressure to realize that is set sets position.The structure that sets further includes centrally disposed pipe
Lower part inlet opening 17 on 3 and be set to that central tube 3 is outer to set piston 13 under 17 corresponding position of lower part inlet opening, under set
Piston 13 is the longer round body of a length, and the upper end is threadedly coupled with the vertical edge of rubber tube seat 10, lower end be located at lower part into
The top of fluid apertures 17, and it is provided with sealing ring on the inner headed face of lower end, it is sealed with the upper surface of lower part inlet opening 17 formation.Center
The outer lower thread in lower part 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, lower part inlet opening 17 are connected to plunger shaft two, and piston 13 is set under described with oily during normal production in oil well pump
Liquid enters after plunger shaft two holding position for making to set piston 2 and being maintained at the balance position from lower part inlet opening 17.Central tube 3
Threaded upper ends are connected with top connection 1, and packer is located in oil pipe by top connection 1 and the string of lower contact 14.
Packer further includes the holding structure that the state of setting is kept it in after compression packing element 11 is realized and set, the guarantor
Holding structure includes lock tube 5 and the lock ring 6 for being fixed at central tube periphery, and lock ring 6 is located in ring cavity, on lock tube 5 and lock ring 6
It is directed downwardly to realize the stuck lock tooth of interlocking with cusp upward to be respectively arranged with cusp.It is set in the ring cavity in the top of lock ring 6
It is equipped with spring 4, there is the supporting surface for being supported to spring 4, which is the upper surface of lock ring 6, bullet on lock ring 6
Spring 4 withstands on its lower end on the supporting surface of lock ring 6 and in pre-compressed state.
The flushing fluid inlet 7 that the flushing fluid in oil supplying sleeve annular space enters in ring cavity is offered on lock tube 5, packer also wraps
Include the unlock knot for realizing that lock tube 5 and lock ring 6 unlock after flushing fluid is entered in ring cavity by oil jacket annulus by flushing fluid inlet 7
Structure.The unlocking structure includes the gap 29 for can be compressed lock ring 6 being set on lock ring 6 and is set to central tube
The deblocking piston 8 for being located at 6 lower section of lock ring outside 3, deblocking piston 8 are located in ring cavity, and deblocking piston 8 has in flushing fluid by oil jacket
Uplink after annular space is entered in ring cavity by flushing fluid inlet 7 is so that lock ring 6 and lock tube 5 realize the solution lock-bit of unlock.Deblocking is lived
The opposite end of plug 8 and lock ring 6, which is respectively arranged with when unsealing 8 uplink of piston, works in coordination so that the compressed inner conical surface of lock ring 6
30 and male cone (strobilus masculinus) 31, after gap 29 is compressed, the outer diameter of lock ring 6 becomes smaller, the lock tooth between lock tube 5 and lock ring 6 release it is stuck,
To realize unlock.The internal diameter for unsealing piston 8 is two up big and down small different diameters, is unsealed between piston 8 and central tube 3
It is formed with plunger shaft three, sealing ring is provided on deblocking piston 8 and the binding face up and down of central tube 3, is offered on central tube 3
With the middle part inlet opening 16 between upper-lower seal circle of plunger shaft tee joint.
Under set and be provided with well-flushing sap cavity between piston 13 and central tube 3, well-flushing sap cavity is connected to the ring cavity, under set
The upper end of piston 13 is provided with communication port 9, the lower part of the compression packing element 11, under set the outside of piston 13 and be provided with expansion glue
Cylinder 12, expand packing element 12 and under set and be provided with expansion cavity between piston 13, under set and offer connection flushing fluid on piston 13
The first of chamber and expansion cavity passes through mouth 28.
The working principle of packer is in the present invention: 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 oil liquid applies downward active force to piston 2 is above set, and above sets piston 2
Lock tube 5 is driven to have the tendency that moving downward, meanwhile, oily liquid in pipe enters plunger shaft two by the lower part inlet opening 17 of packer
In, oil liquid sets piston 13 under and applies upward active force.In this process, work downward suffered by piston 2 is above set
Active force upward suffered by piston 13 is set under being firmly equal to plus upward the sum of the elastic force of spring 4, thus on set piston 2
In balance position, under set piston 13 and be in holding position, compression packing element 11 is uncompressed, i.e., packer is in unset state.This
When oil pipe 19 and casing 22 between oil jacket annulus 18 be connected to oil reservoir 27, can carry out normally surveying the techniques such as liquid level.
When production a period of time, due to being influenced by factors such as temperature, wax deposition section 26, root will form on the inner wall of oil pipe 19
It finds according to actual production, more than which is typically incorporated at 800 meters of well depths, therefore packer is removed 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 will affect the yield of oil well after being formed, at this time
It needs to carry out the operation of hot-washing wax remover, turns down well head production gate first, improve oil pipe inner fluid pressure, realize and suppressed in oil pipe
Pressure, at this moment oil liquid act on set active force downward on piston 2 will be greater than act on down set on piston 13 it is upward
Active force above sets piston 2 and will will push lock tube 5 and move downward plus upward the sum of the elastic force of spring 4.It pushes up the lower end of lock tube 5
In the horizontal sides of rubber tube seat 10, when lock tube 5 continues to move downward, compression packing element 11 is compressed, and packer is in and sets shape
State, to insulate oil jacket annulus 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 is realized and is locked, so that compression packing element 11 is sprung back after preventing the oily overpressure of next step from laying down, is maintained at packer and is set shape
State.Simultaneously in this process, oil liquid enters in plunger shaft three from middle part inlet opening 16, and pushes deblocking 8 downlink of piston, deblocking
Piston 8 is maintained a certain distance with lock ring 6, and preventing deblocking piston 8 from compressing lock ring 6 unlocks lock tube 5 and lock ring 6.
It after compression packing element 11 is set, opens well head and produces gate, keep normal production.Then into oil jacket annulus 18
Hot wash liquid, that is, flushing fluid is injected, before opening well washing switch 20 and flushing fluid is made to enter the wax deposition section 26 of oil pipe, flushing fluid can be first
The flushing fluid inlet 7 first passed through on packer enters in ring cavity, and high pressure flushing liquid applies rubber tube seat 10 after entering in ring cavity
Add downward active force, makes compression packing element 11 continue to keep setting state, and set piston 13 under making and be maintained at lower dead point position
It is motionless.Meanwhile flushing fluid is entered in well-flushing sap cavity by communication port 9, flushing fluid in well-flushing sap cavity again using by mouth 28 into
Enter in expansion cavity, under the pressure effect of flushing fluid, expansion packing element 12, which is expanded and realized, to be set, to realize packer
It is dual to set, the isolation of oil jacket annulus is further enhanced, flushing fluid polluted reservoir is prevented.Simultaneously in this process, ring cavity
In flushing fluid also act against on deblocking piston 8 and make to unseal piston 8 uplink, when the inner conical surface 30 and lock ring 6 of deblocking piston 8
After male cone (strobilus masculinus) 31 cooperates, under the action of unsealing piston 8, the gap 29 on lock ring 6 is compressed, and the outer diameter of lock ring 6 becomes smaller, lock tube
Lock tooth between 5 and lock ring 6 releases stuck, lock tube 5 and the realization unlock of lock ring 6.Meanwhile flushing fluid also reach it is upper in ring cavity
Portion, and apply upward active force to piston 2 is above set, after lock tube 5 and lock ring 6 unlock, in spring 4 and well-flushing hydraulic coupling
Under double action, above set piston 2 and drive 5 uplink of lock tube, it is final on to set piston 2, lock tube 5, lock ring 6 and spring 4 extensive
Original position is arrived again, and packing element 11 is compressed after laying down for lower step well-flushing pressure and the expansion deblocking of packing element 12 is ready.
After compression packing element 11 and expansion packing element 12 realize double-sealing, the well washing switch 20 on packer top is opened, this
When flushing fluid by well washing switch 20 enter oil pipe 19 wax deposition section 26 in, to carry out the operation of hot-washing wax remover.Due to well-flushing
Liquid is directly entered wax deposition section, and when compared to packer being connected in oil pipe bottom, flushing fluid does not have to get to by long pipeline
Wax deposition section, therefore heat loss is seldom, thermal energy is fully utilized, and improves the effect of hot-washing wax remover, and well-flushing liquid measure used is few, hot
It is high-efficient to wash down wax.Packer is set by building the pressure to realize in advance in oil pipe simultaneously, when flushing fluid injects oil jacket annulus, no
It has any flushing fluid to enter in oil reservoir, realizes no pollution, protect oil reservoir.
After the completion of hot-washing wax remover, stop injection flushing fluid, at this moment acts on rubber tube seat 10 and set 13 top of piston under
Pressure disappear, and act on down set 13 lower part of piston oily overpressure be greater than oil jacket annulus in pressure, under set work
Plug 13 will push 10 uplink of rubber tube seat, so that discharging compression packing element 11 and expansion packing element 12 realizes automatic deblocking, oil jacket annulus is again
Before being restored to well-flushing with oil reservoir connected state.In this process, quick for the ease of compression packing element 11 and expansion packing element 12
Rebound, set under piston 13 lower part be additionally provided with one be connected to well-flushing sap cavity second pass through mouth 32, and in packer
Lower part be provided with the through-hole 33 being connected to second by mouth 32, when packer, which is in, sets state, set piston due under
13 downlinks, second is staggered by mouth 32 and through-hole 33, when flushing fluid, which stops injection packer, to be unsealed, under set piston
13 uplinks, second by mouth 32 and the just centering of through-hole 33, 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 in packer be made quickly to restore balance, realizes compression packing element 11
It is quickly sprung back with expansion packing element 12.
During entirely injection flushing fluid carries out hot-washing wax remover, expansion packing element 12 is either further set, still
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
It rings.That is, flushing fluid once stops injecting after the completion of hot-washing wax remover operation, compression packing element 11 and expansion packing element 12 are just
It automatic simultaneously can unseal, not need to be proposed the additional operation such as pumping pipe string, therefore, be protected while completing hot-washing wax remover
The normal production for having demonstrate,proved oil well is not interrupted.And this deblocking mode is more convenient, is quick on the draw, does not need man power and material
Investment, deblocking time are short.
In addition, equilibrium state before packer setting be on to set the balance position of piston be that piston auxiliary is set by down is real
Existing, when fluid pressure increases in oil pipe, piston ability downlink is above set to compression packing element pressure, sets piston above and below in
Not set cutting pin between heart pipe.After flushing fluid enters in ring cavity from oil jacket annulus, deblocking piston stroking upward is locked by compression
The mode of ring unlocks lock ring and lock tube, then on set piston, lock tube, lock ring and spring and be restored to original state,
Therefore when flushing fluid stops injection, after compressing packing element and expansion packing element rebound, packer is completely recovered to before not building the pressure in oil pipe
State, that is to say, that packer may be reused, and in this way when the later period is with the progress of production, tie again in oil pipe
When wax section, directly according to above step repetitive operation, does not need that tubing string is risen replacement component, greatly facilitate oil pick-up tube
The application of column and packer.
Certainly, the structure of packer can also equally apply the occasion in reacting cycle well-flushing in the present embodiment, equally can be with
Achieve the effect that flushing fluid stops injection and can unseal automatically.
In the other embodiments of packer: fluid pressure raising can also be by way of suppressing into oil pipe in oil pipe
It realizes；Spring can be not provided in ring cavity, when above setting piston and being in balance position, oil liquid is to above setting the downward active force of piston
Equal to setting the upward active force of piston under；Under set and can be not provided with second on piston by mouth, and only one first
Pass through mouth；Under set piston outside can be not provided with expansion packing element, packer rely only on compression packing element realization set, at this time
No longer need to setting hot wash sap cavity, only one ring cavity；Set structure can not include lower part inlet opening and under set work
At this moment plug can set between piston and central tube setting and cut pin upper, when oil well pump during normal production, into plunger shaft
Oil liquid in one be insufficient to allow cut pin cut, above set piston be in balance position will not downlink, when fluid pressure in oil pipe
It when raising, cuts pin and is cut, balance is broken, and is above set piston downlink and is set to compression packing element pressure with realizing, at this time
On set piston be in set position；Unlocking structure can not include deblocking piston, and unlocking structure, which can be, to be arranged in lock ring in
Cutting pin between heart pipe, when lock tube and locked lock ring, the screen resilience for compressing packing element, which is insufficient to allow, cuts pin cutting, from
And compression packing element holding can be made to set state, and after high pressure flushing liquid enters in ring cavity, the flushing fluid work upward to lock ring
Firmly cut cutting pin, lock tube and lock ring unlock.
Claims (6)
1. a kind of packer, including the central tube vertically extended, central tube outer is vertically disposed with rubber tube seat and compression
Packing element, being provided on packer when fluid pressure increases in oil pipe, which makes to compress packing element, is compressed to realize that is set sets knot
Structure is additionally provided with the holding structure for making its holding set state after compression packing element is realized and set on packer, it is characterised in that:
It is described keep structure include outside the central tube with the lock ring that sets lock tube and centrally disposed pipe periphery that structure is connected,
It is directed downwardly to realize the stuck lock tooth of interlocking, the lower end of lock tube and institute with cusp upward that cusp is respectively arranged on lock tube and lock ring
It states rubber tube seat to be connected, lock tube, central tube, rubber tube seat and sets and form ring cavity between structure, the lock ring is located in ring cavity, locks
Put on and offer the flushing fluid inlet that the flushing fluid in oil supplying sleeve annular space enters in ring cavity, packer further include flushing fluid by
Oil jacket annulus realizes the unlocking structure of lock tube and lock ring unlock, the unlocking structure after entering in ring cavity by flushing fluid inlet
Including the deblocking below the gap for can be compressed lock ring being set on lock ring and the lock ring being set to outside central tube
Piston, deblocking piston are located in ring cavity, and the opposite end of deblocking piston and lock ring is provided with works in coordination when unsealing piston stroking upward
So that the compressed tapered surface of lock ring, deblocking piston, which has, enters ring cavity by flushing fluid inlet by oil jacket annulus in flushing fluid
In after uplink so that lock ring and lock tube realize the solution lock-bit of unlock.
2. packer according to claim 1, it is characterised in that: spring is provided with above lock ring in the ring cavity,
There is the supporting surface for being supported to spring on lock ring.
3. packer according to claim 1, it is characterised in that: the structure that sets includes upper on centrally disposed pipe
Portion's inlet opening and to be set to central tube outer in setting piston, the upper end of the lock tube and upper seat on the inlet opening corresponding position of top
Seal piston be connected, it is described on set piston have oil well pump during normal production oil liquid from top inlet opening entrance after make compress glue
The balance position and break balance when fluid pressure raising in oil pipe and compression packing element pressure is sat with realizing that cylinder is not compressed
Envelope sets position.
4. packer according to claim 3, it is characterised in that: the structure that sets further includes on centrally disposed pipe
Lower part inlet opening and it is set to that central tube is outer to set piston under the inlet opening corresponding position of lower part, setting piston under described has
In oil well pump, oil liquid makes to set the holding position that piston is maintained at the balance position after the entrance of lower part inlet opening during normal production.
5. packer according to claim 4, it is characterised in that: under set the top of piston and be fixedly connected with rubber tube seat,
Under set and be provided with well-flushing sap cavity between piston and central tube, well-flushing sap cavity is connected to the ring cavity, under the compression packing element
Portion, under set the outside of piston and be provided with expansion packing element, expand packing element and under set and be provided with expansion cavity between piston, under set
First that connection well-flushing sap cavity and expansion cavity are offered on piston passes through mouth.
6. packer according to claim 5, it is characterised in that: under set and be also provided with one and well-flushing sap cavity on piston
By mouth, the lower part of packer is provided with to be staggered, in packer solution the second of connection in packer setting with second by mouth
Feng Shiyu second is realized compression packing element by mouth centering and expands the through-hole that packing element is quickly sprung back.
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 |
|---|---|---|---|
| CN201811485066.9A Division CN109751009B (en) | 2016-09-06 | 2016-09-06 | Repeated hot-washing paraffin removal packer |
| CN201811485067.3A Division CN109751011B (en) | 2016-09-06 | 2016-09-06 | Hot-washing paraffin removal packer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106437605A CN106437605A (en) | 2017-02-22 |
| CN106437605B true CN106437605B (en) | 2018-12-14 |
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ID=58164333
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811485066.9A Active CN109751009B (en) | 2016-09-06 | 2016-09-06 | Repeated hot-washing paraffin removal packer |
| CN201610802750.XA Active CN106437605B (en) | 2016-09-06 | 2016-09-06 | A kind of packer |
| CN201811485067.3A Active CN109751011B (en) | 2016-09-06 | 2016-09-06 | Hot-washing paraffin removal packer |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811485066.9A Active CN109751009B (en) | 2016-09-06 | 2016-09-06 | Repeated hot-washing paraffin removal packer |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811485067.3A Active CN109751011B (en) | 2016-09-06 | 2016-09-06 | Hot-washing paraffin removal packer |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414199B (en) * | 2017-12-29 | 2020-05-22 | 中国海洋石油集团有限公司 | Performance testing device for visual packer rubber cylinder |
| CN109779563B (en) * | 2019-03-25 | 2023-10-20 | 天津五一泰科机电科技有限公司 | Combined oil pump for preventing well flushing from polluting oil layer |
| CN111535775B (en) * | 2020-05-21 | 2022-08-30 | 东营市华科石油科技开发有限责任公司 | Adjustable constant pressure washable well packer |
| 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 |
| CN113445955B (en) * | 2021-08-09 | 2022-01-28 | 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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Also Published As
| Publication number | Publication date |
|---|---|
| CN106437605A (en) | 2017-02-22 |
| CN109751011B (en) | 2021-02-12 |
| CN109751011A (en) | 2019-05-14 |
| CN109751009A (en) | 2019-05-14 |
| CN109751009B (en) | 2021-02-12 |
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