CN106437537A - Oil pumping tubular column with hot-washing paraffin removal function - Google Patents
Oil pumping tubular column with hot-washing paraffin removal function Download PDFInfo
- Publication number
- CN106437537A CN106437537A CN201610802908.3A CN201610802908A CN106437537A CN 106437537 A CN106437537 A CN 106437537A CN 201610802908 A CN201610802908 A CN 201610802908A CN 106437537 A CN106437537 A CN 106437537A
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- China
- Prior art keywords
- piston
- hot
- oil
- packer
- washing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 238000005406 washing Methods 0.000 title claims abstract description 114
- 238000005086 pumping Methods 0.000 title claims abstract description 27
- 239000012188 paraffin wax Substances 0.000 title abstract 8
- 239000007788 liquid Substances 0.000 claims abstract description 65
- 238000012856 packing Methods 0.000 claims description 51
- 230000006835 compression Effects 0.000 claims description 34
- 238000007906 compression Methods 0.000 claims description 34
- 239000003129 oil well Substances 0.000 claims description 19
- 239000012530 fluid Substances 0.000 claims description 18
- 230000008021 deposition Effects 0.000 claims description 17
- 238000002347 injection Methods 0.000 abstract description 8
- 239000007924 injection Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000001556 precipitation Methods 0.000 abstract 3
- 239000003921 oil Substances 0.000 description 65
- 238000000034 method Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 239000010779 crude oil Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 3
- 206010037660 Pyrexia Diseases 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 206010016825 Flushing Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation 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
- 230000009429 distress Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention provides an oil pumping tubular column with a hot-washing paraffin removal function. The oil pumping tubular column comprises an oil tube which extends vertically, wherein a packer is in a series connection with the lower part of a paraffin precipitation section of the oil tube; an oil pumping pump is connected to the bottom of the oil tube; and a setting structure which achieves setting during pressure building of the oil tube is disposed on the packer. The oil pumping tubular column provided by the invention has the beneficial effects that the setting structure which achieves the setting during pressure building in the oil tube is disposed on the packer, so that advance setting of the packer can be achieved through the pressure building in the oil tube before injection of a hot-washing liquid into oil sleeve annular space; and after the setting of the packer, the hot washing liquid is then injected for hot-washing paraffin removal, so that no hot washing liquid will enter an oil layer at this moment, pollution is avoided, and the oil layer is protected. Meanwhile, the packer is in a series connection with the lower part of the paraffin precipitation section, so that the hot washing liquid can directly enter the paraffin precipitation section, so that heat loss is very low, thermal energy can be fully applied, and hot-washing paraffin effects can be enhanced. The consumption amount of the hot washing liquid is low; and hot-washing paraffin removal efficiency is high.
Description
Technical field
The present invention relates to a kind of pumping pipe string with hot-washing wax remover function.
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, cause oil layer pollution to prevent thermal washing liquid to be directly injected in oil reservoir, need in oil pipe
In be connected into packer, for shutting oil jacket annular space.The Chinese invention patent of Publication No. CN1077514A discloses a kind of oil
The dewaxing method of well conduit and a kind of packer for C and WK, it is series connection packer for C and WK in the oil pick-up tube of wax deposition pars infrasegmentalis, so
Inject thermal washing liquid from well head is to oil jacket annular space afterwards, when the higher cleanout fluid of temperature flows to packer, in the temperature of cleanout fluid
And oil jacket annular space is insulated, so that thermal washing fluid-tight is interposed between a certain position of oil well while pressure effect lower unlatching bypass valve
On, and the wax deposition section in oil pick-up tube is flowed directly into by the bypass valve of packer, thermal washing liquid will be molten for the wax of condensation along tube inner wall
Solve and discharge well head.
When this dewaxing method achieves injection thermal washing liquid, thermal washing liquid is directly entered wax deposition section in oil pipe without shaft bottom, contracting
The short flow process of thermal washing liquid, improves wax removal effect.The principle that sets of its packer for C and WK is：List is provided with packer for C and WK
Stream temperature-sensing valve and expander, thermal washing liquid makes the temperature-sensitive element expanded by heating in single current temperature-sensing valve open ball-and-seat first, works as thermal washing
When liquid flows through expander by single current temperature-sensing valve, inflating medium expanded by heating in expander so that gum cover expands, finally by
Gum cover seals oil jacket annular space.
However, because above-mentioned packer leans on temperature to realize setting, practice finds, this temperature need to reach 60 DEG C with
On, and packer just need to enable finally to set through double expansion, and it is swollen to be that temperature-sensitive element in single current temperature-sensing valve is heated first
Just single current temperature-sensing valve can be opened so that thermal washing liquid passes through single current temperature-sensing valve, then thermal washing liquid makes the expansion in expander again after swollen
Medium expanded by heating, realizes setting of packer.Therefore, it is warming up to before double expansion sets this period in thermal washing, will have very
A part of greatly thermal washing liquid enters in oil reservoir, thus causing oil layer pollution, so that the production well production after thermal washing is declined to a great extent.
Content of the invention
It is an object of the invention to provide a kind of pumping pipe string with hot-washing wax remover function, with solve in prior art
Carry out hot-washing wax remover intermittent fever washing liquid to enter oil reservoir and cause the problem of oil layer pollution.
In order to solve above-mentioned technical problem, adopt the following technical scheme that in the present invention：
A kind of pumping pipe string with hot-washing wax remover function, including vertically extending oil pipe, the wax deposition pars infrasegmentalis of oil pipe
String is provided with packer, and the bottom of oil pipe is connected with oil well pump, described packer is provided with when building the pressure in oil pipe and realizes setting
Set structure.
Described packer includes central canal, described set the top inlet opening that structure includes on centrally disposed pipe and sets
It is placed in and sets piston on the inlet opening corresponding position of top outside central canal, the lower section above setting piston is provided with compression packing element, institute
Stating to set piston and have when oil well pump normally produces fluid makes compression packing element be not compressed after the entrance of top inlet opening
Balance position and break balance when building the pressure in oil pipe and with realize setting, position is set to compression packing element pressure, described packing
Device is additionally included in after compression packing element is realized setting makes it keep setting the holding structure of state.
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.
Described holding structure includes the lock ring being connected to outside the lock tube setting piston lower portion and centrally disposed pipe, lock
Cusp to realize interlocking stuck lock tooth directed downwardly with cusp upward is respectively arranged with set and lock ring.
Described packer also includes the unlocking structure for being unlocked to lock tube and lock ring.
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, the opposite end of deblocking piston and lock ring is provided with works in coordination when unsealing piston stroking upward
So that the taper surface that lock ring is compressed.
The lower end of lock tube is provided with adjusting set, and described compression packing element is arranged on the lower section of adjusting set, central canal, lock tube, on
Set piston and adjusting set constitutes ring cavity, described deblocking piston and lock ring are respectively positioned in ring cavity, and lock tube offers oil supplying sleeve
Thermal washing liquid in annular space enters the thermal washing liquid inlet in ring cavity, and described deblocking piston has and passed through by oil jacket annular space in thermal washing liquid
Thermal washing liquid inlet after entering in ring cavity up so that lock ring and lock tube realize the solution lock-bit of unblock.
Under set the top of piston and be fixedly connected with adjusting set, under set and between piston and central canal, be provided with thermal washing liquid
Chamber, thermal washing 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 thermal washing sap cavity and expansion cavity offered on piston
By mouth.
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.
The upper end of described packer is connected with well washing switch, and the bottom of described oil well pump is linked in sequence screen casing and plug.
The beneficial effects of the present invention is：Be provided with packer when building the pressure in oil pipe realize set set structure,
Thus by way of building the pressure in oil pipe, packer premature setting can be made before the injection thermal washing liquid in oil jacket annular space,
After packer setting is good, reinjects thermal washing liquid and carry out hot-washing wax remover, any thermal washing liquid at this moment would not be had to enter in oil reservoir, real
Show no pollution, protect oil reservoir.Simultaneously because packer string is located at wax deposition pars infrasegmentalis, such thermal washing liquid just can be directly entered
Seldom, heat energy is fully utilized, and improves the effect of hot-washing wax remover, and thermal washing liquid measure used is few, hot for wax deposition section, therefore heat loss
Wash down wax efficiency high.
Brief description
Fig. 1 is the use principle figure of the pumping pipe string in the present invention with hot-washing wax remover function；
Fig. 2 is the structure chart in the present invention with the packer in the pumping pipe string of hot-washing wax remover function.
In figure：1. top connection；2. on, set piston；3. central canal；4. spring；5. lock tube；6. lock ring；7. thermal washing liquid feed liquor
Mouthful；8. unseal piston；9. connected entrance；10. adjusting set；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. pass through mouth；29
Gap；30. inner conical surfaces；31. male cone (strobilus masculinus)s.
Specific embodiment
In the present invention, a kind of enforcement of the pumping pipe string with hot-washing wax remover function is for example shown in Fig. 1 ~ Fig. 2, including along upper
The oil pipe 19 that lower direction extends, the wax deposition section 26 bottom string of oil pipe 19 is provided with packer 21, and the upper end of packer 21 is connected with to be washed
Well switch 20, 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 screen casing 24 and plug 25.
Packer 21 includes central canal 3, packer is provided with when building the pressure in oil pipe 19 realize set set structure,
The described structure that sets includes the top inlet opening 15 on centrally disposed pipe 3 and is arranged at outside central canal 3 in top inlet opening
Piston 2 is set on 15 corresponding positions, the internal diameter above setting piston 2 is the different diameter of up big and down small two, in two diameters
Respectively equipped with two sealing rings, above set and between piston 2 and central canal 3, be formed with plunger shaft one, described top inlet opening 15 is located at
Connect between upper-lower seal circle and with plunger shaft one.On set the bottom of piston 2 and be fixedly connected with lock tube 5, the lower end of lock tube 5 sets
It is equipped with adjusting set 10, adjusting set 10 is L-shaped, the vertical edge of L-type adjusting set 10 is located at the inner side of lock tube 5, its horizontal sides and lock tube 5
Block coordinates, for limiting the moving limit that lock tube 5 moves down, lock tube 5, central canal 3, on set piston 2 and adjusting set
10 composition ring cavities.
The lower section of adjusting set 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 adjusting set 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 to include lock tube 5 and be fixedly installed on lock ring 6 outside central canal, lock ring 6 is located in ring cavity, on lock tube 5 and lock ring 6 point
It is not provided with cusp to realize interlocking stuck lock tooth directed downwardly with cusp upward.In described ring cavity, the top in lock ring 6 is arranged
There is 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, spring
4 make its lower end withstand on the supporting surface of lock ring 6 and be in its pre-compressed state after mounting.
Packer also includes the unlocking structure for being unlocked to lock tube 5 and lock ring 6, and described unlocking structure includes arranging
In on lock ring 6 for making gap 29 that lock ring 6 can be compressed and being arranged at the solution positioned at lock ring 6 lower section outside central canal 3
Envelope piston 8, the opposite end of deblocking piston 8 and lock ring 6 be respectively arranged with unseal piston 8 up when work in coordination so that lock ring 6
The inner conical surface 30 being compressed and male cone (strobilus masculinus) 31, after gap 29 is compressed, the external diameter of lock ring 6 diminishes, between lock tube 5 and lock ring 6
Lock tooth release stuck, thus realize unlock.The internal diameter of deblocking piston 8 is the different diameter of up big and down small two, and deblocking is lived
It is formed with plunger shaft three between plug 8 and central canal 3, deblocking piston 8 and the binding face up and down of central canal 3 are provided with sealing
Circle, central canal 3 offers and plunger shaft tee joint the middle part inlet opening 16 between upper-lower seal circle.Open on lock tube 5
The thermal washing liquid being provided with oil supplying sleeve annular space enters the thermal washing liquid inlet 7 in ring cavity, and deblocking piston 8 has in thermal washing liquid by oil jacket
Annular space after being entered in ring cavity by thermal washing liquid inlet 7 up so that lock ring 6 and lock tube 5 realize the solution lock-bit of unblock.
Under set and between piston 13 and central canal 3, be provided with thermal washing sap cavity, thermal washing 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 thermal washing liquid offered on piston 13
Chamber and expansion cavity by mouth 28.
The operation principle of pumping pipe string is：During normal production, oil well pump 23 works, and oily liquid in pipe passes through the upper of packer
Portion's inlet opening 15 enters in plunger shaft one, and fluid applies downward active force to above setting piston 2, above sets piston 2 and drives lock
Set 5 has the trend moving downward, and meanwhile, oily liquid in pipe enters in plunger shaft two by the bottom inlet opening 17 of packer, oil
Liquid under set the active force that piston 13 applies upwards.In this process, above set downward active force suffered by piston 2 etc.
In under set active force upwards suffered by piston 13 and add spring 4 elastic force sum upwards, therefore on set piston 2 be in flat
Weighing apparatus position, under set piston 13 and be in holding position, compression packing element 11 is uncompressed, and that is, packer is in unset state.Now oil pipe
Oil jacket annular space 18 between 19 and sleeve pipe 22 is connected 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 oily overpressure, that is, realize building the pressure in oil pipe,
At this moment fluid act on set downward active force on piston 2 will be more than acting on down the effect upwards on piston 13 that sets
Power adds spring 4 elastic force sum upwards, above sets piston 2 and lock tube 5 will be promoted to move downward.The lower end of lock tube 5 withstands on tune
In the horizontal sides of section set 10, when lock tube 5 continues to move downward, compression packing element 11 is compressed, and packer is in the state of setting, from
And insulate oil jacket annular space 18.When lock tube 5 moves downward to a certain extent, the mutual buckle of lock tooth on lock tube 5 and lock ring 6, real
Existing locked, thus preventing next step oil overpressure from compressing packing element 11 resilience after laying down, make packer be maintained at the state of setting.With
When in this process, fluid from middle part inlet opening 16 enter plunger shaft three, and promote deblocking piston 8 descending, unseal piston 8
Maintain a certain distance with lock ring 6, prevent 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, open well washing switch 20 make thermal washing liquid enter oil pipe wax deposition section 26 before, thermal washing liquid can first pass through envelope
Enter in ring cavity every the thermal washing liquid inlet 7 on device, hot high pressure washing liquid applies downward to adjusting set 10 after entering in ring cavity
Active force, makes compression packing element 11 continue holding and sets state, and making down to set piston 13, to be maintained at lower dead point position motionless.With
When, thermal washing liquid enters in thermal washing sap cavity by connected entrance 9, and the thermal washing liquid in thermal washing sap cavity enters expansion cavity using by mouth 28 again
In, under the pressure of thermal washing liquid acts on, expansion packing element 12 is expanded and is achieved and sets, it is achieved thereby that the dual seat of packer
Envelope, further enhances the isolation of oil jacket annular space, prevents thermal washing liquid polluted reservoir.In this process, the heat in ring cavity simultaneously
Washing liquid also acts against on deblocking piston 8 and makes deblocking piston 8 up, when the inner conical surface 30 of deblocking piston 8 and the male cone (strobilus masculinus) of lock ring 6
31 cooperation after, deblocking piston 8 in the presence of, the gap 29 on lock ring 6 is compressed, and the external diameter of lock ring 6 diminishes, lock tube 5 and lock
Lock tooth releasing between ring 6 is stuck, and lock tube 5 and lock ring 6 realize unblock.Meanwhile, thermal washing liquid arrives also by the gap 29 on lock ring 6
Reach the top in ring cavity, and to above setting the active force that piston 2 applies upwards, after lock tube 5 and lock ring 6 unlock, in spring 4 He
Under the dual function of thermal washing hydraulic coupling, above set piston 2 and drive lock tube 5 up, final on set piston 2, lock tube 5 and spring
4 return to original position, 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
Intermittent fever washing liquid enters in the wax deposition section 26 of oil pipe 19 by well washing switch 20, thus carrying out the operation of hot-washing wax remover.Due to thermal washing
Liquid is directly entered wax deposition section, compares when packer is connected in oil pipe bottom, and thermal washing liquid is got to without by long pipeline
Seldom, heat energy is fully utilized, and improves the effect of hot-washing wax remover, and thermal washing 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 thermal washing liquid injection oil jacket annular space, no
Have any thermal washing liquid to enter in oil reservoir it is achieved that no pollution, protect oil reservoir.
After the completion of hot-washing wax remover, stop injection thermal washing liquid, at this moment act on adjusting set 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 adjusting set 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 that the bottom of piston 13 is additionally provided with that another one connected with thermal washing sap cavity by hole, and in packer
Bottom be provided with and should the through hole that connect by hole, when packer is in and sets state, due under to set piston 13 descending, logical
Via and through hole stagger, when thermal washing liquid stops injection packer and will unseal, under to set piston 13 up, by hole and logical
A part of thermal washing liquid in hole just centering, therefore thermal washing sap cavity can also from packer is discharged by hole and through hole so that
In packer, two-way pressure quickly restores balance, thus realizing compressing packing element 11 and the expansion quick resilience of packing element 12.
During whole injection thermal washing liquid 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, without carrying out to pumping pipe string appointing
What extra operation, impacts thus without to oil pumping operation, ensure that the normal of oil well while completing hot-washing wax remover
Produce.
In the other embodiment of pumping pipe string：Spring can be not provided with ring cavity, when above setting piston and being in balance position,
Fluid to above set the downward active force of piston be equal to under set piston active force upwards；Under set piston outside permissible
It is not provided with expanding packing element, packer relies only on compression packing element and realizes setting, now without arranging thermal washing sap cavity, only one of which again
Ring cavity；Unlocking structure can not include unsealing piston, and unlocking structure can be provided in cutting between lock ring and central canal
Disconnected pin, 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 cuts off, such that it is able to make compression
Packing element keeps setting state, and after hot high pressure washing liquid enters in ring cavity, to lock ring, active force upwards makes break pin to thermal washing liquid
Nail is cut off, and lock tube is unlocked with lock ring；Holding structure can not be the stuck lock tube of lock tooth interlocking and lock ring, and holding structure also may be used
To be provided in the ball-and-seat at the inlet opening of top, fluid can only enter plunger shaft one inside central canal and cannot discharge,
At this moment connect a common adapter sleeve in the upper bottom setting piston, when above setting descent of piston, by under adapter sleeve
Exercise compression packing element to set, because in plunger shaft one, fluid cannot be discharged, therefore compression packing element may remain in the state of setting, that is,
On set piston and be in and set position；Set structure can not include bottom inlet opening and under set piston, at this moment can be upper
Set setting between piston and central canal and cut off pin, when oil well pump normally produces, the fluid entering in plunger shaft one is not enough
So that cut off pin cutting off, above set piston be in balance position will not be descending, when building the pressure in oil pipe, cut off pin and cut off,
Balance is broken, and above sets descent of piston and compression packing element is pressed to realize setting, now on set piston and be in and set position.
Claims (10)
1. a kind of pumping pipe string with hot-washing wax remover function, including vertically extending oil pipe, under the wax deposition section of oil pipe
Portion string be provided with packer, the bottom of oil pipe be connected with oil well pump it is characterised in that：It is provided with described packer and suppress in oil pipe
What during pressure, realization set sets structure.
2. the pumping pipe string with hot-washing wax remover function according to claim 1 it is characterised in that：Described packer includes
Central canal, described set the top inlet opening that structure includes on centrally disposed pipe and be arranged at central canal outer in top feed liquor
Piston is set on the corresponding position of hole, the lower section above setting piston is provided with compression packing element, described on set piston and have in oil pumping
When pump normally produces, fluid makes balance position that compression packing element is not compressed after the entrance of top inlet opening and builds the pressure in oil pipe
When break balance and with realize setting, position set to compression packing element pressure, described packer is additionally included in compression packing element and realizes sitting
It is honored as a queen and make it keep setting the holding structure of state.
3. the pumping pipe string with hot-washing wax remover function according to claim 2 it is characterised in that：Described set structure also
Including the bottom inlet opening on centrally disposed pipe and be arranged at that central canal is outer to set work under the inlet opening corresponding position of bottom
Plug, described under set piston and there is when oil well pump normally produces fluid make to set piston after the entrance of bottom inlet opening and keep
Holding position in described balance position.
4. the pumping pipe string with hot-washing wax remover function according to claim 3 it is characterised in that：Described holding structure bag
Include the lock ring being connected to outside the lock tube setting piston lower portion and centrally disposed pipe, lock tube and lock ring are respectively arranged with tooth
Point to realize interlocking stuck lock tooth directed downwardly with cusp upward.
5. the pumping pipe string with hot-washing wax remover function according to claim 4 it is characterised in that：Described packer also wraps
Include the unlocking structure for being unlocked to lock tube and lock ring.
6. the pumping pipe string with hot-washing wax remover function according to claim 5 it is characterised in that：Described unlocking structure bag
Include be arranged on lock ring for make gap that lock ring can be compressed and be arranged at outside central canal lock ring below deblocking live
Plug, 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.
7. the pumping pipe string with hot-washing wax remover function according to claim 6 it is characterised in that：The lower end setting of lock tube
Have adjusting set, described compression packing element is arranged on the lower section of adjusting set, central canal, lock tube, on set piston and adjusting set is constituted
Ring cavity, described deblocking piston and lock ring are respectively positioned in ring cavity, and thermal washing liquid lock tube offering in oil supplying sleeve annular space enters ring cavity
In thermal washing liquid inlet, described deblocking piston have thermal washing liquid by oil jacket annular space by thermal washing liquid inlet enter ring cavity in
Up afterwards so that lock ring and lock tube realize the solution lock-bit of unblock.
8. the pumping pipe string with hot-washing wax remover function according to claim 7 it is characterised in that：Under set the upper of piston
Portion is fixedly connected with adjusting set, under set and between piston and central canal, be provided with thermal washing sap cavity, thermal washing sap cavity is with described ring cavity even
Logical, 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 between piston
Be provided with expansion cavity, under set offer on piston connection thermal washing sap cavity and expansion cavity by mouth.
9. the pumping pipe string with hot-washing wax remover function according to claim 7 or 8 it is characterised in that：In described ring cavity
The top of lock ring is provided with spring, lock ring has the supporting surface for being supported to spring.
10. the pumping pipe string with hot-washing wax remover function according to claim 1 ~ 8 any one it is characterised in that：Institute
The upper end stating packer is connected with well washing switch, and the bottom of described oil well pump is linked in sequence screen casing and plug.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610802908.3A CN106437537B (en) | 2016-09-06 | 2016-09-06 | A kind of pumping pipe string with hot-washing wax remover function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610802908.3A CN106437537B (en) | 2016-09-06 | 2016-09-06 | A kind of pumping pipe string with hot-washing wax remover function |
Publications (2)
| Publication Number | Publication Date |
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| CN106437537A true CN106437537A (en) | 2017-02-22 |
| CN106437537B CN106437537B (en) | 2019-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610802908.3A Active CN106437537B (en) | 2016-09-06 | 2016-09-06 | A kind of pumping pipe string with hot-washing wax remover function |
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| CN (1) | CN106437537B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216911A (en) * | 2021-05-31 | 2021-08-06 | 中国海洋石油集团有限公司 | Floating sieve tube |
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| CN1083561A (en) * | 1992-09-03 | 1994-03-09 | 王国造 | Process for producing casing of oil-pumping well |
| US20080041631A1 (en) * | 1994-10-14 | 2008-02-21 | Vail William B Iii | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| CN202451113U (en) * | 2012-01-18 | 2012-09-26 | 中国石油化工股份有限公司 | Thermally-cleaning, wax-removing and oil layer pollution-preventing oil pumping pipe column |
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| CN105178906A (en) * | 2015-09-29 | 2015-12-23 | 中国石油天然气股份有限公司 | Layered steam driving packer with combination effect |
| CN205422653U (en) * | 2016-03-18 | 2016-08-03 | 中国石油化工股份有限公司 | Multi -functional oil pipe post of taking out |
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| CN1083561A (en) * | 1992-09-03 | 1994-03-09 | 王国造 | Process for producing casing of oil-pumping well |
| US20080041631A1 (en) * | 1994-10-14 | 2008-02-21 | Vail William B Iii | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| CN202451113U (en) * | 2012-01-18 | 2012-09-26 | 中国石油化工股份有限公司 | Thermally-cleaning, wax-removing and oil layer pollution-preventing oil pumping pipe column |
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| CN105178906A (en) * | 2015-09-29 | 2015-12-23 | 中国石油天然气股份有限公司 | Layered steam driving packer with combination effect |
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| CN113216911A (en) * | 2021-05-31 | 2021-08-06 | 中国海洋石油集团有限公司 | Floating sieve tube |
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| Publication number | Publication date |
|---|---|
| CN106437537B (en) | 2019-04-26 |
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