CN109681146A - Double medium multistage amplificate packers and card encapsulation method - Google Patents
Double medium multistage amplificate packers and card encapsulation method Download PDFInfo
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- CN109681146A CN109681146A CN201810340673.XA CN201810340673A CN109681146A CN 109681146 A CN109681146 A CN 109681146A CN 201810340673 A CN201810340673 A CN 201810340673A CN 109681146 A CN109681146 A CN 109681146A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000005538 encapsulation Methods 0.000 title claims abstract description 6
- 238000012856 packing Methods 0.000 claims abstract description 123
- 230000005540 biological transmission Effects 0.000 claims abstract description 121
- 238000007789 sealing Methods 0.000 claims abstract description 73
- 230000007246 mechanism Effects 0.000 claims abstract description 50
- 230000003044 adaptive effect Effects 0.000 claims abstract description 19
- 230000001105 regulatory effect Effects 0.000 claims abstract description 16
- 239000003292 glue Substances 0.000 claims abstract description 15
- 230000000903 blocking effect Effects 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 6
- 230000002265 prevention Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 239000010410 layer Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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- 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
- E21B33/122—Multiple string packers
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pressure Vessels And Lids Thereof (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses double medium multistage amplificate packers and card encapsulation methods, the packer of one of scheme, including central tube and cover packing element in center pipe outer wall, the packing element includes upper shoulder short rubber cylinder, middle part long packing element type, lower shoulder short rubber cylinder, middle part long packing element type upper end connects upper shoulder short rubber cylinder by upper double indirect pressure transmission mechanisms of medium, middle part long packing element type lower end connects lower shoulder short rubber cylinder by lower pressure transmission mechanism, and the upper shoulder short rubber cylinder upper end and lower shoulder short rubber cylinder lower end are all connected with respective longitudinal adaptive regulating mechanism.Several flexible combinations of glue are applicable in longer section of card and seal field demand, the chance card problem for avoiding single long section packing element from causing；Different packing element length, combining properties meet different cards sealing strength demand；Upper and lower shoulder longitudinal direction adaptive regulating mechanism reduces shoulder stress concentration effect and guarantees reasonably to set pressure；Double indirect pressure transmission mechanisms of medium avoid the problem of single packing element rupture causes whole tubing string to fail.
Description
Technical field
The present invention relates to oilfield technology development field, specifically double medium multistage amplificate packers and card encapsulation method.
Background technique
Long-term injecting water develops oil reservoir, easily formation abrupt local, extreme water consumption band, to reduce inefficient cycle, improving water drive effect
Rate is needed further to segment interval and blocked, certain effect is achieved using conventional packer.But for no stabilization every
Layer or small interlayer, big thick-layer perforated interval need to block the well of envelope, and conventional packer is then unable to satisfy demand.In recent years, development forms logical
The technology for crossing card envelope in the length realization layer for increase Inflatable type packer rubber sleeve, is primarily present three aspect problems: (1) by packing element knot
Structure, material set pressure difference, difficulty of processing, cost etc. and restrict, and limit the increase of packing element length, card envelope curtailment, Wu Faman
Card envelope demand in longer section of layer of foot；(2) packing element longitudinal size is larger, once tubing string is changed in tear failure inspection above proposes the accumulation of process rubber
It easily leads to tubing string and meets card；(2) packing element then blocks failure once damaging, and then leads to whole time tubing string failure, considerably increases dispensing
Cost.Need to study that the scope of application is wider, the higher card envelope technique of security performance thus.
By retrieving the packer of the prior art, do not find the packer that can solve following technical problem, (1) be applicable in compared with
Long section card seals field demand, the chance card problem for avoiding single long section packing element from causing；(2) meet different cards sealing strength demand；(3) it drops
Low shoulder stress concentration effect simultaneously guarantees reasonably to set pressure；(4) single packing element rupture is avoided to lead to whole tubing string failure
Problem.
Summary of the invention
The purpose of the present invention is to provide double medium multistage amplificate packers and card encapsulation method, several flexible combinations of glue are suitable
Field demand is sealed with longer section of card, the chance card problem for avoiding single long section packing element from causing；Different packing element length, combining properties meet
Different cards sealing strength demand；Upper and lower shoulder longitudinal direction adaptive regulating mechanism reduces shoulder stress concentration effect and guarantees reasonable
Set pressure；Double indirect pressure transmission mechanisms of medium avoid the problem of single packing element rupture causes whole tubing string to fail.
In order to achieve the above objectives, present invention employs following technical solution, double medium multistage amplificate packers, including in
Heart pipe and packing element in center pipe outer wall being covered, the packing element includes upper shoulder short rubber cylinder, middle part long packing element type, lower shoulder short rubber cylinder,
The length of the middle part long packing element type is greater than the length of upper shoulder short rubber cylinder, while also greater than the length of lower shoulder short rubber cylinder, described
The hardness of middle part long packing element type is less than the hardness of upper shoulder short rubber cylinder, while again smaller than the hardness of lower shoulder short rubber cylinder, the middle part
Long packing element type upper end connects upper shoulder short rubber cylinder by upper double indirect pressure transmission mechanisms of medium, and middle part long packing element type lower end passes under passing through
Press mechanism connects lower shoulder short rubber cylinder, and the upper shoulder short rubber cylinder upper end and lower shoulder short rubber cylinder lower end are all connected with respective vertical
To adaptive regulating mechanism.
In order to achieve the above objectives, present invention employs following technical solution, double medium multistage amplificate packers, including in
Heart pipe and packing element in center pipe outer wall is covered, the packing element includes that upper shoulder short rubber cylinder, middle part moderate-length packing element, lower shoulder are short
Packing element, the middle part moderate-length packing element is at least arranged two, and is evenly arranged on center pipe outer wall, the middle part moderate-length packing element
Length be greater than the length of upper shoulder short rubber cylinder, while also greater than the length of lower shoulder short rubber cylinder, the middle part moderate-length glue
The hardness of cylinder is less than the hardness of upper shoulder short rubber cylinder, while again smaller than the hardness of lower shoulder short rubber cylinder, the middle part of the top is medium
Length packing element upper end connects upper shoulder short rubber cylinder, the middle part moderate-length packing element of bottom by upper double indirect pressure transmission mechanisms of medium
Lower end connects lower shoulder short rubber cylinder by lower pressure transmission mechanism, and middle part moderate-length packing element is connected by middle pressure transmission mechanism between any two
It connects, middle pressure transmission mechanism is identical with lower pressure transmission mechanism, and the upper shoulder short rubber cylinder upper end and lower shoulder short rubber cylinder lower end are all connected with
Respective longitudinal direction adaptive regulating mechanism.
Upper double indirect pressure transmission mechanisms of medium include upper housing, transmission medium, upper sealing pressure transmission piston, the upper housing
Upper end connects the lower blocking bowl of upper shoulder short rubber cylinder, the upper gear bowl of long packing element type in the middle part of the connection of lower end, in the upper jacket internal setting
Pressure transmission piston is sealed, sealing pressure transmission piston outer wall and upper housing seal on this, and inner wall and upper center tube seal, and the upper sealing passes
Pressure piston is divided into top set's piston and inferior division piston, and top set's piston limits on the limiting stand that upper outer casing inner wall opens up
End face, inferior division piston upper end are limited in the limiting stand lower end surface that upper outer casing inner wall opens up, top set's piston and inferior division piston
Between space form lumen, the central tube opens up the pressure transmission hole of connection lumen, and the space above top set's piston is formed
Chamber, epicoele are connected to shoulder short rubber cylinder lower end surface, and the space below inferior division piston forms cavity of resorption, and cavity of resorption is connected to middle minister
Packing element upper surface, epicoele and under it is intracavitary fill transmission medium, top set's piston pushes shoulder short rubber cylinder in medium bulging, lower point
Branch piston pushes long packing element type in the middle part of medium bulging.
The lower pressure transmission mechanism includes connector sleeve, lower housing, anti-rotation nail, lower sealing pressure transmission piston, transmission medium, the company
It connects and is arranged between lower housing and central tube, the lower blocking bowl of the lower outer set upper side connection middle part long packing element type, lower end connects lower shoulder
The upper gear bowl of portion's short rubber cylinder, the lower housing are fixed on connector sleeve by anti-rotation nail, lower piston between housing and central tube
Pressure transmission piston is sealed under intracavitary setting, the lower sealing pressure transmission piston outer wall and lower housing seal, and inner wall and lower center tube seal, institute
It states central tube and opens up the pressure transmission hole for being connected to lower sealing pressure transmission piston upper space, lower sealing pressure transmission piston lower space is connected to
Lower shoulder short rubber cylinder upper surface, lower sealing pressure transmission piston lower space fill transmission medium, and the upper sealing pressure transmission piston pushes
Shoulder short rubber cylinder under medium bulging.
Longitudinal adaptive regulating mechanism of the upper shoulder short rubber cylinder upper end includes upper automatic adjusument set, described adaptive
Adjusting set lower end and the upper gear bowl of upper shoulder short rubber cylinder is answered to be connected through a screw thread, upper end inner wall slidingtype connects top connection outer wall,
Sealing ring is arranged between the upper automatic adjusument set and top connection to seal.
Longitudinal adaptive regulating mechanism of the lower shoulder short rubber cylinder lower end includes lower automatic adjusument set, adaptive under described
Set upper side should be adjusted and the lower blocking bowl of lower shoulder short rubber cylinder is connected through a screw thread, lower end inner wall slidingtype connects lower contact outer wall,
Sealing ring is arranged between the lower automatic adjusument set and lower contact to seal.
The central tube includes the upper center tube and lower center tube being vertically connected with.
In order to achieve the above objectives, present invention employs following technical solution, the card of double medium multistage amplificate packers is sealed
Method, comprising the following steps:
It sets: being provided inside packer and set hydrodynamic medium, dynamic medium is through the biography on upper center tube, lower center tube
Pressure hole transfers the pressure to sealing pressure transmission piston, seals installation sealing ring on pressure transmission piston and completely cuts off dynamic medium and transmission medium simultaneously
Can axially slide, sealing pressure transmission piston by hydraulic coupling it is mobile and squeeze transmission medium cause transmission medium to shoulder short rubber cylinder,
The movement of middle part long packing element type direction finally makes shoulder short rubber cylinder, the complete bulging of middle part long packing element type, and realization is set；The one of shoulder short rubber cylinder
End gear bowl and automatic adjusument set is connected, and short packing element is radially expanded and axial shrinkage when setting, and convergent force pulls gear bowl and certainly
It is mobile to shrinkage direction to adapt to adjusting set, reduction sets pressure and reduces packing element end stress concentration；
Deblocking: after releasing the pressure for setting hydrodynamic medium inside packer, transmission medium pressure acts on sealing and passes
Press the power on piston to be greater than the power of its other end, cause to seal pressure transmission piston to mobile far from packing element direction, shoulder short rubber cylinder, in
Minister's packing element internal pressure is decreased and is retracted automatically under elastic force, removing seal for packer；
Packing element ruptures lost circulation prevention: since sealing pressure transmission piston has effectively completely cut off dynamic medium and transmission medium space, shoulder
After short rubber cylinder, the rupture of any one packing element of middle part long packing element type, packer internal liquid cannot be introduced into after encountering sealing pressure transmission piston
Outside packer, it cannot be introduced into inside packer after same outside liquid sealing pressure transmission piston, realize lost circulation prevention function, it is ensured that its
It is normally set in his packer, injection well downhole flow regulator the injecting process and water distribution.
Compared with the prior art, the invention has the following beneficial effects:
Gone out using long-acting card envelope under the conditions of several expansion packing element units realization different cards envelope length with safety.Main inventive
Content are as follows: by several flexible combinations of glue, realize card envelope length seriation；Upper and lower shoulder sealing unit is higher using intensity,
The shorter packing element of length improves shoulder tear resistance, and middle part uses single or multiple sealing units, sealing unit packing element length
It is different from anti-pressure ability, meet different length, different cards sealing strength demand；Upper and lower shoulder sealing unit is using longitudinal adaptive tune
Mechanism is saved, shoulder stress concentration effect is reduced and guarantees reasonably to set pressure；Devise the indirect pressure transmission mechanism packing of double media
Device mechanism, thoroughly changes the method that existing amplificate packer directly relies on pressurized fluid bulging packing element in tubing string, and utility is steady
Fixed fluid sets dynamic medium as bulging medium, using pressurized fluid offer in oil pipe, bulging medium and dynamic medium it
Between by the pressure transmission piston isolation with sealing function, packing element inner cavity is not connected directly with space in tubing string, even if can glue automatically
Cylinder ruptures, and will not be connected to inside and outside tubing string, other packers, injection well downhole flow regulator still can work normally.
(1) several flexible combinations of glue are applicable in longer section of card and seal field demand, the chance card for avoiding single long section packing element from causing
Problem；
(2) different packing element length, combining properties meet different cards sealing strength demand；
(3) shoulder longitudinal direction adaptive regulating mechanism, reduction shoulder stress concentration effect simultaneously guarantee reasonably to set pressure up and down
Power；
(4) the indirect pressure transmission mechanism of double media avoids the problem of single packing element rupture causes whole tubing string to fail.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of double medium multistage amplificate packers of the present invention.
In figure: 1-top connection, 2-upper center tubes, 3-sealing rings, 4-upper automatic adjusument sets, the 5-upper short glue of shoulder
The upper gear bowl of cylinder, 6-upper shoulder short rubber cylinders, 7-upper housings, 8-above seal pressure transmission piston, 9-middle part long packing element types, 10-lower outer
Set, 11-connector sleeves, 12-anti-rotation nails, 13-lower center tubes, 14-lower sealing pistons, 15-lower contacts, 16-upper shoulders are short
The lower blocking bowl of packing element, the upper gear bowl of 17-middle part long packing element types, the upper gear bowl of 18-lower shoulder short rubber cylinders, the 19-lower short glue of shoulder
The lower blocking bowl of cylinder, the lower blocking bowl of 20-lower shoulder short rubber cylinders, 21-lower automatic adjusument sets, 22-middle part long packing element types.
Specific embodiment
Detailed description for the present invention and technology contents, cooperation Detailed description of the invention is as follows, however attached drawing is only to refer to and say
It is bright to be used, it is not intended to limit the present invention.
According to Fig. 1, double medium multistage amplificate packers including central tube and cover packing element in center pipe outer wall, institute
Stating packing element includes upper shoulder short rubber cylinder 6, middle part long packing element type 9, lower shoulder short rubber cylinder 19, and the length of the middle part long packing element type is greater than upper
The length of shoulder short rubber cylinder, while also greater than the length of lower shoulder short rubber cylinder, the hardness of the middle part long packing element type is less than upper shoulder
The hardness of short rubber cylinder, while again smaller than the hardness of lower shoulder short rubber cylinder, 9 upper end of middle part long packing element type is indirect by upper double media
Pressure transmission mechanism connects upper shoulder short rubber cylinder 6, and 9 lower end of middle part long packing element type connects lower shoulder short rubber cylinder by lower pressure transmission mechanism
19, the upper shoulder short rubber cylinder upper end and lower shoulder short rubber cylinder lower end are all connected with respective longitudinal adaptive regulating mechanism.
Upper double indirect pressure transmission mechanisms of medium include upper housing 7, transmission medium, upper sealing pressure transmission piston 8, described outer
Cover the lower blocking bowl 16 that 7 upper ends connect upper shoulder short rubber cylinder, the upper gear bowl 17 of lower end connection middle part long packing element type, the upper jacket internal
Pressure transmission piston 8 is sealed in setting, sealing pressure transmission piston outer wall and upper housing seal on this, and inner wall and upper center tube seal, described
Upper sealing pressure transmission piston 8 divides for top set's piston and inferior division piston, and the limit of top set's piston is opened up in upper outer casing inner wall
Limiting stand upper surface, the limit of inferior division piston upper end in the limiting stand lower end surface that upper outer casing inner wall opens up, top set's piston and
Space between inferior division piston forms lumen, and the central tube opens up the pressure transmission hole of connection lumen, above top set's piston
Space forms epicoele, and epicoele is connected to 6 lower end surface of shoulder short rubber cylinder, and the space below inferior division piston forms cavity of resorption, cavity of resorption
It is connected to middle part 9 upper surface of long packing element type, epicoele is intracavitary under to fill transmission medium, and top set's piston pushes shoulder in medium bulging
Portion's short rubber cylinder 6, inferior division piston push long packing element type 9 in the middle part of medium bulging.
The lower pressure transmission mechanism includes connector sleeve 11, lower housing 10, anti-rotation nail 12, lower sealing pressure transmission piston 14, pressure transmission Jie
Matter, the connection are arranged between lower housing 10 and central tube, the lower blocking bowl 22 of the lower outer set upper side connection middle part long packing element type,
Lower end connects the upper gear bowl 18 of lower shoulder short rubber cylinder, and the lower housing is fixed on connector sleeve by anti-rotation nail 12, lower housing 10
Lower sealing pressure transmission piston 14 is set in the plunger shaft between central tube, the lower sealing pressure transmission piston outer wall and lower housing seal,
Inner wall and lower center tube seal, and the central tube opens up the pressure transmission hole for being connected to lower sealing pressure transmission piston upper space, lower sealing
Pressure transmission piston lower space is connected to lower 19 upper surface of shoulder short rubber cylinder, and lower sealing pressure transmission piston lower space filling pressure transmission is situated between
Matter, the upper sealing pressure transmission piston push shoulder short rubber cylinder 19 under medium bulging.
Longitudinal adaptive regulating mechanism of the upper shoulder short rubber cylinder upper end includes upper automatic adjusument set 4, described to go up certainly
It adapts to adjusting set lower end and the upper gear bowl 5 of upper shoulder short rubber cylinder is connected through a screw thread, upper end inner wall slidingtype connects outside top connection
Wall is arranged sealing ring 3 and seals between the upper automatic adjusument set and top connection 1.
Longitudinal adaptive regulating mechanism of the lower shoulder short rubber cylinder lower end includes lower automatic adjusument set 21, and described time certainly
It adapts to adjust set upper side and the lower blocking bowl 20 of lower shoulder short rubber cylinder is connected through a screw thread, lower end inner wall slidingtype connects outside lower contact
Wall is arranged sealing ring and seals between the lower automatic adjusument set and lower contact 15.
The central tube includes the upper center tube 2 and lower center tube 13 being vertically connected with.
Connection: top connection 1, lower contact 15 are connect with upper and lower part tubing string respectively.
It sets: being provided inside packer and set hydrodynamic medium, dynamic medium is through on upper center tube 2, lower center tube 13
Pressure transmission hole transfer the pressure to sealing pressure transmission piston 8, lower sealing piston 14, seal pressure transmission piston on installation sealing ring isolation
Dynamic medium can with transmission medium and axially slide, and upper sealing pressure transmission piston 8 is mobile by hydraulic coupling and squeezes transmission medium, draw
Play transmission medium finally makes upper shoulder short rubber cylinder 6, middle part long packing element type 9 complete to shoulder short rubber cylinder 6, the movement of 9 direction of middle part long packing element type
Full bulging, realization are set.The upper gear bowl 5 of shoulder short rubber cylinder is connected with upper automatic adjusument set 4, and short rubber cylinder 6 is radial swollen when setting
Swollen and axial shrinkage, convergent force pull gear bowl 5 and upper automatic adjusument set 4 mobile to shrinkage direction, and reduction sets pressure simultaneously
Packing element end stress is reduced to concentrate.
Deblocking: after releasing the pressure for setting hydrodynamic medium inside packer, transmission medium pressure acts on sealing and passes
It presses the power on piston to be greater than the power of its other end, causes to seal pressure transmission piston to mobile, the upper shoulder short rubber cylinder far from packing element direction
6, long packing element type 9 internal pressure in middle part is decreased and is retracted automatically under elastic force, removing seal for packer.
Packing element ruptures lost circulation prevention: since upper sealing pressure transmission piston 8, lower sealing piston 14 have effectively completely cut off dynamic medium and pass
Dielectric space is pressed, after upper shoulder short rubber cylinder 6, the rupture of any one packing element of middle part long packing element type 9, packer internal liquid encounters sealing
It cannot be introduced into outside packer after pressure transmission piston, cannot be introduced into inside packer after the same sealed pressure transmission piston of outside liquid,
Realize lost circulation prevention function, it is ensured that normally set in other packers, injection well downhole flow regulator the injecting process and water distribution.
Double medium multistage amplificate packers are made of multiple expanding sealing units, and sealing unit length, material can have
Multiple combinations mode is mainly made of central tube, upper shoulder short rubber cylinder, middle part long packing element type, lower shoulder short rubber cylinder.Wherein, upper shoulder
Portion's short rubber cylinder, lower shoulder short rubber cylinder length is shorter, hardness is higher, and middle part long packing element type length is larger, hardness is lower.
In addition, middle part long packing element type blocks the combination that envelope length requirement carries out several packing elements of different length according to scene, in
Heart pipe, upper shoulder short rubber cylinder, middle part moderate-length packing element, lower shoulder short rubber cylinder.Middle part sealing unit use two and two with
On middle part moderate-length packing element, under routine, the length of middle part moderate-length packing element is greater than shoulder short rubber cylinder, and is less than middle minister
Packing element.
Double medium multistage amplificate packers including central tube and cover packing element in center pipe outer wall, and the packing element includes upper
Shoulder short rubber cylinder, middle part moderate-length packing element, lower shoulder short rubber cylinder, the middle part moderate-length packing element are at least arranged two, and
It is evenly arranged on center pipe outer wall, the length of the middle part moderate-length packing element is greater than the length of upper shoulder short rubber cylinder, while also greater than
The length of lower shoulder short rubber cylinder, the hardness of the middle part moderate-length packing element are less than the hardness of upper shoulder short rubber cylinder, while also small
It is connected in the middle part moderate-length packing element upper end of the hardness of lower shoulder short rubber cylinder, the top by upper double indirect pressure transmission mechanisms of medium
The middle part moderate-length packing element lower end of upper shoulder short rubber cylinder, bottom connects lower shoulder short rubber cylinder, middle part by lower pressure transmission mechanism
Moderate-length packing element is connected by middle pressure transmission mechanism between any two, and middle pressure transmission mechanism is identical with lower pressure transmission mechanism, the upper shoulder
Short rubber cylinder upper end and lower shoulder short rubber cylinder lower end are all connected with respective longitudinal adaptive regulating mechanism.
Double medium multistage amplificate packer sealing units are more, and structure is different, but each sealing unit has one
Determine similitude.
The foregoing is merely presently preferred embodiments of the present invention, non-to limit the scope of the patents of the invention, other are with this
The equivalence changes of patent of invention spirit should all belong to the scope of the patents of the invention.
Claims (8)
1. pair medium multistage amplificate packer, including central tube and packing element in center pipe outer wall is covered, which is characterized in that the glue
Cylinder includes upper shoulder short rubber cylinder, middle part long packing element type, lower shoulder short rubber cylinder, and the length of the middle part long packing element type is greater than the short glue of upper shoulder
The length of cylinder, while also greater than the length of lower shoulder short rubber cylinder, the hardness of the middle part long packing element type is less than upper shoulder short rubber cylinder
Hardness, while again smaller than the hardness of lower shoulder short rubber cylinder, middle part long packing element type upper end passes through upper double indirect pressure transmission mechanisms of medium
Shoulder short rubber cylinder in connection, middle part long packing element type lower end connect lower shoulder short rubber cylinder, the upper shoulder by lower pressure transmission mechanism
Short rubber cylinder upper end and lower shoulder short rubber cylinder lower end are all connected with respective longitudinal adaptive regulating mechanism.
2. pair medium multistage amplificate packer, including central tube and packing element in center pipe outer wall is covered, which is characterized in that the glue
Cylinder includes upper shoulder short rubber cylinder, middle part moderate-length packing element, lower shoulder short rubber cylinder, and the middle part moderate-length packing element is at least arranged
Two, and it is evenly arranged on center pipe outer wall, the length of the middle part moderate-length packing element is greater than the length of upper shoulder short rubber cylinder, simultaneously
Also greater than the length of lower shoulder short rubber cylinder, the hardness of the middle part moderate-length packing element is less than the hardness of upper shoulder short rubber cylinder, together
When again smaller than lower shoulder short rubber cylinder hardness, the middle part moderate-length packing element upper end of the top passes through upper double indirect pressure transmission machines of medium
Structure connects upper shoulder short rubber cylinder, and the middle part moderate-length packing element lower end of bottom connects the lower short glue of shoulder by lower pressure transmission mechanism
Cylinder, middle part moderate-length packing element are connected by middle pressure transmission mechanism between any two, and middle pressure transmission mechanism is identical with lower pressure transmission mechanism, described
Upper shoulder short rubber cylinder upper end and lower shoulder short rubber cylinder lower end are all connected with respective longitudinal adaptive regulating mechanism.
3. double medium multistage amplificate packers according to claim 1, which is characterized in that upper double indirect pressure transmissions of medium
Mechanism includes upper housing, transmission medium, upper sealing pressure transmission piston, and the upper outer set upper side connects the lower block of upper shoulder short rubber cylinder
Bowl, lower end connect the upper gear bowl of middle part long packing element type, seal pressure transmission piston in the upper jacket internal setting, sealing pressure transmission is lived on this
Wall and upper housing seal beyond the Great Wall, and inner wall and upper center tube seal, and the upper sealing pressure transmission piston is divided into top set's piston and lower point
Branch piston, the limit of top set's piston exist in the limiting stand upper surface that upper outer casing inner wall opens up, the limit of inferior division piston upper end
The limiting stand lower end surface that upper outer casing inner wall opens up, space between top set's piston and inferior division piston form lumen, it is described in
Heart pipe opens up the pressure transmission hole of connection lumen, and the space above top set's piston forms epicoele, and epicoele is connected to shoulder short rubber cylinder
Lower end surface, the space below inferior division piston form cavity of resorption, and cavity of resorption is connected to middle part long packing element type upper surface, epicoele and under it is intracavitary
Transmission medium is filled, top set's piston pushes shoulder short rubber cylinder in medium bulging, and inferior division piston pushes long in the middle part of medium bulging
Packing element.
4. double medium multistage amplificate packers according to claim 1, which is characterized in that the lower pressure transmission mechanism includes connecting
Female connector, lower housing, anti-rotation nail, lower sealing pressure transmission piston, transmission medium, the connection are arranged between lower housing and central tube,
The lower blocking bowl of the lower outer set upper side connection middle part long packing element type, lower end connects the upper gear bowl of lower shoulder short rubber cylinder, the lower housing
It is fixed on connector sleeve by anti-rotation nail, setting is lower in lower plunger shaft between housing and central tube seals pressure transmission piston, under this
Sealing pressure transmission piston outer wall and lower housing seal, and inner wall and lower center tube seal, and the central tube, which opens up, is connected to lower sealing biography
The pressure transmission hole of piston upper space is pressed, lower sealing pressure transmission piston lower space is connected to lower shoulder short rubber cylinder upper surface, lower sealing
Pressure transmission piston lower space fills transmission medium, and the upper sealing pressure transmission piston pushes shoulder short rubber cylinder under medium bulging.
5. double medium multistage amplificate packers according to claim 1 or 2, which is characterized in that the upper shoulder short rubber cylinder
Longitudinal adaptive regulating mechanism of upper end includes upper automatic adjusument set, the upper automatic adjusument set lower end and the short glue of upper shoulder
The upper gear bowl of cylinder is connected through a screw thread, and upper end inner wall slidingtype connects top connection outer wall, the upper automatic adjusument set and on connect
Setting sealing ring seals between head.
6. double medium multistage amplificate packers according to claim 1 or 2, which is characterized in that the lower shoulder short rubber cylinder
Longitudinal adaptive regulating mechanism of lower end includes lower automatic adjusument set, the lower automatic adjusument set upper side and the lower short glue of shoulder
The lower blocking bowl of cylinder is connected through a screw thread, and lower end inner wall slidingtype connects lower contact outer wall, the lower automatic adjusument set and under connect
Setting sealing ring seals between head.
7. double medium multistage amplificate packers according to claim 1 or 2, which is characterized in that the central tube includes upper
The upper center tube and lower center tube of lower connection.
8. the card encapsulation method of pair medium multistage amplificate packer, which comprises the following steps:
It sets: being provided inside packer and set hydrodynamic medium, dynamic medium is through the pressure transmission hole on upper center tube, lower center tube
Sealing pressure transmission piston is transferred the pressure to, installation sealing ring isolation dynamic medium and transmission medium and axial is sealed on pressure transmission piston
It can slide, sealing pressure transmission piston is mobile by hydraulic coupling and squeezes transmission medium and causes transmission medium to shoulder short rubber cylinder, middle part
The movement of long packing element type direction finally makes shoulder short rubber cylinder, the complete bulging of middle part long packing element type, and realization is set；One end of shoulder short rubber cylinder is kept off
Bowl is connected with automatic adjusument set, and short packing element is radially expanded and axial shrinkage when setting, convergent force pull gear bowl with adaptively
Adjusting set is mobile to shrinkage direction, and reduction sets pressure and reduces packing element end stress concentration；
Deblocking: after releasing the pressure for setting hydrodynamic medium inside packer, it is living that transmission medium pressure acts on sealing pressure transmission
Power beyond the Great Wall is greater than the power of its other end, causes to seal pressure transmission piston to mobile, shoulder short rubber cylinder, middle minister far from packing element direction
Packing element internal pressure is decreased and is retracted automatically under elastic force, removing seal for packer；
Packing element ruptures lost circulation prevention: since sealing pressure transmission piston has effectively completely cut off dynamic medium and transmission medium space, the short glue of shoulder
After cylinder, the rupture of any one packing element of middle part long packing element type, packer internal liquid cannot be introduced into packing after encountering sealing pressure transmission piston
Outside device, it cannot be introduced into inside packer after same outside liquid sealing pressure transmission piston, realize lost circulation prevention function, it is ensured that other envelopes
Every normally being set in device, injection well downhole flow regulator the injecting process and water distribution.
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| CN109681146B CN109681146B (en) | 2024-07-19 |
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| CN114458223A (en) * | 2021-07-06 | 2022-05-10 | 中海油能源发展股份有限公司 | Layered packer for large-drift-diameter water injection and using method thereof |
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