CN106677737A - Sealing assembly and sealing equipment - Google Patents
Sealing assembly and sealing equipment Download PDFInfo
- Publication number
- CN106677737A CN106677737A CN201710140232.0A CN201710140232A CN106677737A CN 106677737 A CN106677737 A CN 106677737A CN 201710140232 A CN201710140232 A CN 201710140232A CN 106677737 A CN106677737 A CN 106677737A
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- sealing
- black box
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- radially
- wall
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- 238000007789 sealing Methods 0.000 title claims abstract description 195
- 230000004323 axial length Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 4
- 239000013049 sediment Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 17
- 239000007788 liquid Substances 0.000 description 17
- 230000000694 effects Effects 0.000 description 16
- 239000012071 phase Substances 0.000 description 9
- 239000007791 liquid phase Substances 0.000 description 8
- 241000521257 Hydrops Species 0.000 description 7
- 206010030113 Oedema Diseases 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 239000004576 sand Substances 0.000 description 6
- 210000003205 muscle Anatomy 0.000 description 5
- 239000007790 solid phase Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000008676 import Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000011144 upstream manufacturing 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Revetment (AREA)
Abstract
The invention provides a sealing assembly and sealing equipment comprising the sealing assembly. The sealing assembly comprises a sliding sleeve, a sealing sleeve, a first limiting sleeve, a second limiting sleeve and an inner fixed sleeve. The first limiting sleeve and the second limiting sleeve are fixed to the two ends of the inner fixed sleeve correspondingly. The sliding sleeve is formed by splicing at least two sliding branched petals, and the two ends of each sliding branched petal are mounted in the first limiting sleeve and the second limiting sleeve in a radial moving fit mode correspondingly. The outer wall of the sealing sleeve is in seal fit with the inner wall surface of the sliding sleeve. The sealing sleeve is formed by splicing at least two sealing branched petals, and each splicing gap of the sliding branched petals corresponds to one sealing branched petal. An outer boss stretching outwards is arranged on the outer wall of the inner fixed sleeve. An inner boss stretching inwards is arranged on the inner wall of the sliding sleeve. The first side face of the outer boss is in seal fit with the end face of the first side of the inner boss. The sealing performance of the sealing assembly can be guaranteed when the outer diameter of the sealing assembly changes.
Description
Technical field
The present invention relates to the discharge opeing technology in oil gas field and coal-bed gas exploitation field, more particularly to a kind of black box, this
It is bright to further relate to a kind of water-tight equipment with above-mentioned black box.
Background technology
In the recovery process of low pressure oil gas field and coal bed gas, pit shaft hydrops is that restriction Oil/gas Well stable yields is main with high yield
One of problem.In order to ensure that oil, gas well are normally produced, it is necessary to which the hydrops in pit shaft is discharged in time.
It is one of conventional fluid-discharge method using water-tight equipment, its operation principle is：Water-tight equipment sets position in down-hole
Put, the black box of water-tight equipment implements air-liquid isolation.When driving a well, pit shaft itself gas compression energy reserve or Oil/gas Well energy
Amount promotes water-tight equipment up, and water-tight equipment top hydrops is discharged into pit shaft.During closing well, water-tight equipment moves to down-hole setting position
Put；Drive a well again, the above-mentioned circulation of repetition realizes that continuous draining is produced.To those skilled in the art, need to solve sealing
Excellent sealing between component and shaft in wall and inside black box, to meet the demand of Oil/gas Well normal drainage production.
Due to underground working is complicated and shaft in wall have it is certain irregular, therefore, water-tight equipment is up in the wellbore
With it is descending when, need ensure its smoothly pass over performance.The reducing amplitude of the black box of existing water-tight equipment is less and reducing
When poor sealing performance, reduce by performance and sealing property, reduce discharge opeing effect.
Therefore, how to improve the sealing property of black box and by performance, improve discharge opeing effect, become art technology
Personnel's technical barrier urgently to be resolved hurrily.
The content of the invention
First purpose of the present invention is to provide a kind of black box, and the black box has in oil pipe or inner-walls of duct
Preferable sealing effectiveness and good by performance.
Second object of the present invention is to provide a kind of water-tight equipment including above-mentioned black box.
The black box that the present invention is provided includes slip cap, sealing shroud, the first stop collar, the second stop collar and interior fixation
Set；First stop collar and the second stop collar are individually fixed in the two ends of interior fixed cover；
The slip cap is at least combined into by two lobes that slide, and a lobe two ends of sliding are respectively to move radially cooperation side
Formula is arranged in first stop collar and the second stop collar；The outer wall of the sealing shroud is formed with the internal face of the slip cap
Sealing cooperation, the sealing shroud is at least combined into by two sealing lobes, and each split gap of a lobe that slides and one
Sealing lobe is corresponding；
The interior fixed cover outer wall arranges outwardly directed outer lug boss；The slip cap inwall is provided with inwardly stretch out interior
Boss；The outer lug boss first side coordinates with the first side end face seal of the inner convex platform.
Optionally, the first end of the sealing shroud is provided with step, in the external cylindrical surface of the step and the inner convex platform
Cylindrical coordinates into cylinder face seal.
Optionally, end face seal is formed between the step bottom face of the step and the second end face of the inner convex platform to match somebody with somebody
Close.
Optionally, the step top end face of the step forms end face seal and coordinates with the first end face of the outer lug boss.
Optionally, it is provided with elastic device between the interior fixed cover outer wall and the inwall of the sealing shroud.
Optionally, the second end end face of the sealing shroud and the first stop collar inner face or the second stop collar inner face
Between have spacing.
Optionally, the sealing shroud inwall is provided with radially-directed groove, and the interior fixed cover outer wall is provided with radially-directed
Projection, the radially-directed is raised to radially slide cooperation and the radially-directed groove between；Or；
The sealing shroud inwall is provided with radially-directed projection, and the interior fixed cover outer wall is provided with radially-directed groove, institute
State that radially-directed is raised to radially slide cooperation with the radially-directed groove.
Optionally, at least partly the piece slided between a lobe includes forming end face slip by lateral extension portions close
Joint seal gap.
A kind of water-tight equipment that the present invention is provided includes connecting rod and black box, and black box is any of the above-described kind close
Sealing assembly；The interior fixed cover inwall coordinates or is integrated part with the outer wall of the connecting rod.
Another kind of water-tight equipment that the present invention is provided includes connecting rod and black box, and black box is any of the above-described kind
Black box；The inner convex platform is located at outer lug boss top, and the connecting rod arranges upper limit plane and lower limit plane；It is described
The interior fixed cover inwall of black box and the outer wall rotatable engagement of the connecting rod；The black box is located at the upper limit
Between face and lower limit plane.
Optionally, the outer face of first stop collar coordinates with the lower limit face seal；The upper limit plane is with
Confined planes distance is more than the black box axial length, and the interior fixed cover inwall is axially sliding with the outer wall of the connecting rod
It is dynamic to coordinate；Through-flow groove is provided with the outside wall surface of the connecting rod；The black box upper end is supported with the upper limit plane
With the through-flow gap for connecting the through-flow groove when tactile.
Optionally, the interior fixation is arranged with the clearance hole of inside and outside communication, and the clearance hole and the through-flow groove phase
Mutually link up.
The black box that the present invention is provided includes slip cap, sealing shroud, the first stop collar, the second stop collar and interior fixation
Set；First stop collar and the second stop collar are individually fixed in the two ends of interior fixed cover；The slip cap is at least by two cunnings
A dynamic lobe is combined into, described to slide a lobe two ends respectively to move radially fit system installed in first stop collar and the second limit
In the set of position；The outer wall of the sealing shroud forms sealing and coordinates with the internal face of the slip cap, and the sealing shroud is at least by two
Sealing lobe is combined into, and each split gap of a lobe that slides is corresponding with a sealing lobe.Water-tight equipment up or
During descending, when running into that operating mode is different or pit shaft internal diameter changes, a lobe that slides is produced and moved radially, i.e. single-lobe or many lobes
Or overall reducing, adapt to the change of pit shaft internal diameter, so improve black box by performance.The outer wall of the sealing shroud with it is described
The inwall face seal of slip cap coordinates, and the sealing shroud is at least combined into by two sealing lobes, and each of a lobe that slides
Split gap is corresponding with a sealing lobe；While black box external diameter changes, the inside of black box is all the time
Keep sealing.The interior fixed cover outer wall is provided with outwardly directed outer lug boss；The slip cap inwall is provided with and inwardly stretches out
Inner convex platform；The outer lug boss first side coordinates with the first side end face seal of the inner convex platform；In gaslift or at other
Under discharge opeing operating mode, active force makes inner convex platform keep fitting with the outer lug boss, it is ensured that the axial direction between slip cap and interior fixed cover
Sealing, and then the sealing property of the black box for improving.
In further technical scheme, the first end of the sealing shroud is provided with step, and the external cylindrical surface of the step with
The inner cylinder face of the slip cap inner convex platform forms cylinder face seal and coordinates.Under the effect of the pressure, the outside cylinder of the step
Face keeps gluing, sealing with the inner cylinder face of the inner convex platform, it is to avoid or the clearance leakage that slip cap split is propped up between lobe is reduced,
Improve the sealing effectiveness of black box.
In further technical scheme, the second end face of the step bottom face of the step and the slip cap inner convex platform it
Between formed end face seal coordinate；And/or, the first end face of the step top end face of the step and the interior fixed cover outer lug boss it
Between formed end face seal coordinate, improve between sealing shroud and slip cap, the sealing property between sealing shroud and interior fixed cover is kept away
Exempt from or reduce the pressure loss, improve the sealing effectiveness of black box.
In further technical scheme, flexible dress is set between the interior fixed cover outer wall and the inwall of the sealing shroud
Put, elastic device makes sealing shroud outer wall and the slip cap inwall keeps laminating, and then ensures the sealing reliability of black box.
In further technical scheme, the second end of the sealing shroud is non-step end, the second end of the sealing shroud with
There is spacing gap between the first stop collar inner face or the second stop collar inner face.Gas phase or liquid phase can just pass through institute
The split gap stated spacing gap and slide between a lobe enters sealing shroud inner side, acts on sealing shroud inwall, makes outside sealing shroud
Wall and slip cap inwall, sealing shroud step top end face and interior fixed cover outer lug boss first end face, slip cap inner convex platform first end face
It is brought into close contact with interior fixed cover outer lug boss first end face, it is ensured that the sealing effectiveness of black box.
In further technical scheme, the sealing shroud inwall is provided with radially-directed groove；The interior fixed cover outer wall sets
It is equipped with radially-directed raised；The radially-directed groove radially slides cooperation with the radially-directed projection；Or, the sealing shroud
Inwall is provided with radially-directed projection, and the interior fixed cover outer wall is provided with radially-directed groove, the radially-directed projection and institute
State radially-directed groove and radially slide cooperation.When sealing shroud is moved radially with slip cap, due to slip cap, sealing shroud, interior fixed cover,
First stop collar is constant with the annexation of the second stop collar, it is ensured that sealing shroud is relative with slip cap lobe split gap
Should seal, it is ensured that sealing is remained during reducing inside black box.
Further in technical scheme, at least partly the piece slided between a lobe includes being formed by lateral extension portions
End face is slidingly sealed gap.The piece for sliding between a lobe under external force can change (expand or shrink), described horizontal
Gap end face accordingly slides to realize the reducing of slip cap, while the lateral clearance keeps the close of the piece slided between a lobe
Envelope.
The water-tight equipment that the present invention is provided includes connecting rod and black box, and black box is any of the above-described kind of sealing group
Part；The interior fixed cover inwall coordinates or is integrated part with the outer wall of the connecting rod.
In the water-tight equipment that further technical scheme is provided, the connecting rod is hollow, and the connecting rod lower end connects
Lower contact is connected to, to adapt to other types hole condition.
In the water-tight equipment that optional technical scheme is provided, the connecting rod arranges upper limit plane and lower limit plane；Institute
State the outer wall rotatable engagement of interior fixed cover inwall and the connecting rod；The black box is located at the upper limit plane and lower limit
Between plane.The inner convex platform of the slip cap is located at the outer lug boss top of interior fixed cover, the i.e. black box of above-below direction upside-down mounting,
Also there is corresponding technique effect.Water-tight equipment external force traction drive effect under it is up when, water-tight equipment top hydrops it is anti-
Active force applies the active force of downwardly and outwardly radial direction to sealing shroud, makes black box play interior sealing, the effect of external seal, protects
The needs of card up operating mode discharge opeing under external force traction drive.
In the water-tight equipment that further technical scheme is provided, the outer face of first stop collar and the lower limit plane
Sealing coordinate, this sealing cooperation can be plane, sphere, the conical surface or other combination sealing end faces, all should the present invention protection
In the range of.
In the water-tight equipment that further technical scheme is provided, the distance between the upper limit plane and lower limit plane are more than
The black box axial length, the outer wall axial sliding fit of the interior fixed cover inwall and the connecting rod；The company
Through-flow groove is provided with the outside wall surface of extension bar part；Have when the black box upper end contradicts with the upper limit plane and connect institute
State the through-flow gap of through-flow groove.When water-tight equipment is up under the effect of external force traction drive, the outer end of first stop collar
Sealing between face and the lower limit plane coordinates, and reduces the pressure loss, improves discharge opeing efficiency；It is close when water-tight equipment is descending
Sealing assembly is contacted with upper limit plane, gas phase, liquid phase, solid phase or mixed phase can by through-flow groove and the black box upper end with
Through-flow gap reaches water-tight equipment top between the upper limit plane, and then makes water-tight equipment smooth descending.
In further optional technical scheme, interior fixation is arranged with the clearance hole of inside and outside communication, and the clearance hole and institute
State through-flow groove to communicate with each other.Descending black box is non-tight over-current state, when black box is descending, in interior fixed cover
The long-pending sand in outside can be discharged outside water-tight equipment by clearance hole using through-flow groove, and then it is certain to have water-tight equipment
Sediment outflow self-purification function, reduce stuck phenomenon, improve water-tight equipment reliability.When black box is up, black box with
Form sealing between lower limit plane to coordinate, clearance hole and through-flow groove keep the sealing of black box, Jin Erke without leakage channel
To realize that discharge opeing is operated.
Description of the drawings
Comprising in the description and accompanying drawing and the description of the part that constitutes description shows the example of the present invention
Property, feature and aspect, and for explaining the principle of the present invention.
Fig. 1 is a kind of structural representation of water-tight equipment that the embodiment of the present invention one is provided；
Fig. 2 is part A mplifying structure schematic diagram in Fig. 1；
Fig. 3 is a kind of down-hole fastener structure diagram (local)；
Fig. 4 is water-tight equipment combination principle schematic diagram (local) that Fig. 3 down-holes fastener is provided with embodiment one；
Fig. 5 is a kind of well head trip rod structure diagram；
Fig. 6 is that well head trip rod shown in Fig. 5 clashes into water-tight equipment unlatching by-pass prot principle schematic.
Fig. 7 is a kind of structural representation of water-tight equipment that the embodiment of the present invention two is provided；
Fig. 8 is the uplink state structural representation of the water-tight equipment that the embodiment of the present invention three is provided；
Fig. 9 is the downstream state structural representation of the water-tight equipment that the embodiment of the present invention three is provided.
Wherein, in figure：
Bypass valve rod 1, locking ball 2, lower contact 3, lower limit cover 4 (the second stop collars), sealing shroud 5, elastic device 6,
Slip cap 7, interior fixed cover 8, upper limit cover 9 (the first stop collars), connecting tube 10, gas-liquid import 11, fixed screw 12, spring
13rd, connecting rod 14, plug lower contact 15, retainer ring 16, attaching nut 17, connecting screw rod 18, lower limit plane S1, lower limit plane
S2, through-flow groove 91, lower slipses 20, packing element 21, upper slipses 22, fastener main body 23, fastener impact head 24, well head trip rod
25th, well head trip rod main body 26, step 51, clearance hole 81, sealing coordinates M1, end face seal to coordinate M2, cylinder face seal to coordinate
M3, end face seal coordinate M4, end face seal to coordinate M5, be slidingly sealed gap M6.
Specific embodiment
Various exemplary embodiments, feature and the aspect of the present invention are described in detail below with reference to accompanying drawing.It is identical in accompanying drawing
Reference represent the same or like element of function.Although the various aspects of embodiment are shown in the drawings,
Unless otherwise indicated, it is not necessary to accompanying drawing drawn to scale.Here special word " exemplary " mean " be used as example, embodiment or
Person is illustrative ".Any embodiment here as illustrated by " exemplary " should not necessarily be construed as being better than or being better than other embodiment.
In addition, in order to better illustrate the present invention, numerous details are given in specific embodiment below.
It will be appreciated by those skilled in the art that without some details, the present invention equally can be implemented.In some instances, for
Method well known to those skilled in the art, means, element are not described in detail, in order to highlight the purport of the present invention.
In presents, except non-binding context has other to represent or have special instruction, " interior ", " outward ", " end ", " horizontal stroke
To ", " longitudinal direction ", " on ", the noun of locality such as D score, be to be determined based on example seal component central axis.In addition, herein
Sealing described in part coordinates, and is not to represent there is no gap therebetween, according to actual needs, can make between mating surface
Predetermined gap is kept, keeping corresponding sealing simultaneously, being to slide, assemble or other are actually needed provides convenient.
In this part, in order to save space, also for be easy to it will be appreciated by those skilled in the art that to the present invention provide it is close
While envelope apparatus embodiments are described, because the description of water-tight equipment embodiment includes retouching black box embodiment
State, so no longer individually being described to the black box embodiment that the present invention is provided.
Fig. 1 is refer to, Fig. 1 is a kind of structural representation of water-tight equipment that the embodiment of the present invention one is provided.The embodiment
The water-tight equipment of offer includes connecting rod and the black box on connecting rod.In the present embodiment, connecting rod is
Connecting tube 10 and lower contact 3；The outer diameter cylindrical surface cover of connecting tube 10 is equipped with black box.
The lower end of connecting tube 10 is provided with lower contact 3, and between connecting tube 10 and lower contact 3 bypass valve is provided with.The present embodiment
In, by screwed connection between connecting tube 10 and lower contact 3, and the two holding is fixedly connected by fixed screw 12；Certainly,
Can also remain connected to connect by existing other modes between connecting tube 10 and lower contact 3.
In the present embodiment one, black box includes that slip cap 7, upper limit covers 9 (the first stop collars), lower limit set 4 (second
Stop collar), interior fixed cover 8, sealing shroud 5 and elastic device 6.Upper limit set 9 and lower limit set 4 are separately mounted to interior fixed cover 8
Two ends；Interior fixed cover 8 is rotationally set on the oval cylinder of the little external diameter of connecting tube 10, therefore, black box can be relative
Rotate in connecting tube 10, to improve the black box suitability.It is appreciated that interior fixed cover 8 can keep fixing with connecting tube 10；
In the case of the two holding is fixed, it is also possible to the two is set to into integral piece, to adapt to other hole conditions.
In the present embodiment, there is radial direction teeth groove the inner side of upper limit set 9, lower limit set 4；The upper and lower side of interior fixed cover 8 has grafting tooth
Muscle.The radial direction teeth groove of grafting tooth muscle grafting upper limit set 9, the lower limit set 4 of the upper and lower ends of interior fixed cover 8, and then keep relative
It is fixed.
In the present embodiment, slip cap 7 is the set shape structure being combined into by multiple lobe that slide, and each slides and props up lobe upper and lower two
Hold to have and move radially foot；Radially inside teeth groove inserts and keeps radially moving with upper limit set 9, lower limit set 4 to move radially foot
Dynamic connection.Each lobe that slides can be moved radially independently relative to upper limit set 9, lower limit set 4 and interior fixed cover 8；So,
Water-tight equipment during upstream or downstream, due to hole condition is different or pit shaft internal diameter changes when, sliding a lobe can be with footpath
To movement, adapt to the change of pit shaft internal diameter, it is ensured that black box and water-tight equipment by adaptability.
In the present embodiment, slip cap 7 is to be combined into by many lobe T-shaped slip lobe, and each lobe that slides is T-shaped, multiple T-shaped cunnings
Dynamic lobe is mutually buckle-shaped into slip cap 7.There is longitudinal reducing gap between adjacent T-shaped slip lobe and slide laterally gap, and laterally
Glade plane space forms end face and is slidingly sealed gap M6；So can ensure that monolithic or multi-disc are slided and prop up the needs of lobe reducing；Adjacent T
End face is slidingly sealed gap M6 while ensureing sealing between shape slip lobe.The end face for extending laterally is slidingly sealed gap M6 can be with
Sliding, the piece between a lobe keeps gap sealing in above-below direction, it is to avoid or reduce because the pressure that piece is caused is damaged
Lose；Ensure the sealing effectiveness of black box.It is appreciated that slip cap 7 can also be combined into by the slip of other shapes lobe, extremely
When the piece that small part is slided between a lobe includes that forming end face by lateral extension portions is slidingly sealed gap M6, it is also possible to reach
Similar effect.
It is appreciated that slip cap 7 can at least 4 lobes of sliding be combined into, a lobe two ends of sliding are separately mounted to first
In the stop collar 4 of stop collar 9 and second, single independent slip lobe two ends respectively with the first stop collar 9 and the second stop collar 4
Move radially cooperation.Certainly, when slip cap 7 is other concrete structures, a lobe that slides is not limited to 4.
Fig. 2 is refer to, sealing shroud 5 is located between slip cap 7 and interior fixed cover 8, outer wall and the slip cap 7 of sealing shroud 5
Internal face forms sealing and coordinates M1.In the present embodiment, sealing shroud 5 is combined into by multiple sealing lobes, and each sealing lobe and cunning
The split gap of dynamic lobe is corresponding.Ensure sealing property of the black box when external diameter changes.It is appreciated that sealing
The quantity of lobe can be corresponding with the quantity of a lobe that slides, and each sealing lobe is corresponding with the split gap of a lobe that slides.I.e.：
Sealing shroud 5 at least can be combined into by two sealing lobes, and each split gap of the formation of a lobe that slides and a sealing
Lobe is corresponding.
In the present embodiment one, elastic device 6 is provided between sealing shroud 5 and interior fixed cover 8, elastic device 6 can be by multiple
Cylindrical spring formation, or the elastic component of other shapes.Elastic device 6 supports sealing shroud 5, makes the outer wall of sealing shroud 5 and cunning
7 inwalls of dynamic set keep laminating, and then ensure the sealing reliability of black box.It is appreciated that under specific operation, it is also possible to profit
The outer wall of sealing shroud 5 and the inwall of slip cap 7 is set to keep laminating with gas/liquid phase pressure or other modes or effect.
As shown in figure 1, in the present embodiment, there is long lumbar hole on the circumference of the upper end of connecting tube 10, there is male thread lower end, and centre has
There is sealing chamfering through hole, lower surface inner side；The lower end of connecting tube 10 has screw thread to be connected with the upper end of lower contact 3, it is possible to understand that：Also may be used
To connect by other means.There is importing angle the lower end of lower contact 3, cylindrical to have liquid bath and liquid pass hole.
Bypass valve is installed between connecting tube 10 and lower contact 3.Bypass valve includes bypass valve rod 1, bypasses the upper end of valve rod 1
For sealing surface, lower end is guiding cone, and the guiding cone is through in the through hole of the axial direction of lower contact 3, bypasses the external cylindrical surface of valve rod 1
Ball locating slot and positive stop lug boss are provided with, the relevant position of lower contact 3 is provided with installing hole, ball 2 and bullet are provided with installing hole
Property resetting means, elasticity reset device can be spring 13；Ball 2 is against on spring 13；The side of lower contact 3 is provided with bypass
Hole.
As shown in figure 1, the sealing surface of bypass valve rod 1 upper end can be ball sealer face, plane or the conical surface；The sealing surface can be with
Sealing is cooperatively formed with the lower surface of connecting tube 10 to coordinate.
Refer to Fig. 3 and Fig. 4, Fig. 3 is a kind of down-hole fastener structure diagram (local)；Fig. 4 be Fig. 3 down-holes fastener with
Water-tight equipment combination principle schematic diagram (local) that embodiment one is provided.Down-hole fastener includes lower slipses 20, packing element 21, upper card
Watts 22, fastener main body 23 and fastener impact head 24.
Refer to Fig. 5 and Fig. 6, Fig. 5 simultaneously is a kind of well head trip rod structure diagram；Fig. 6 is that well head shown in Fig. 5 clashes into
Bar clashes into water-tight equipment opens by-pass prot principle schematic.Well head trip rod includes well head trip rod 25 and well head trip rod main body
26。
Combined with down-hole fastener and well head trip rod, the course of work of the water-tight equipment provided using embodiment one is such as
Under：
Wellhead shut-in, water-tight equipment falls, and the middle through hole of connecting tube 10 and by-pass prot are opened, and gas-liquid can pass through lower contact
3 side is provided with by-pass prot, the through hole of connecting tube and long lumbar hole and flows upward from black box lower section, and then reduces sealing
Equipment resistance, water-tight equipment downstream rate is very fast, and the closed-in time is reduced to a certain extent.Fall to clashing into fastener in water-tight equipment
After impact head 24, move on bypass valve rod 1, the sealing surface and the lower surface of connecting tube 10 for bypassing the upper end of valve rod 1 coordinates, and by-pass prot is closed
Close.When ground well head drives a well, in the presence of stratum and other energy, gas-liquid is by black box lower section, i.e. slip cap 7 and lower limit
Position set 4 or the split gap 11 of slip cap 7, into black box inner chamber, make the outer wall of sealing shroud 5 keep sealing with the inwall of slip cap 7,
The outer shifting of slip cap 7 coordinates holding sealing and end face to be slidingly sealed gap M6 and realize black box jointly with oil pipe or inner-walls of duct
Inner sealing and outside sealing.The black box of water-tight equipment is close to duct wall sealing oil pipe or pipeline, stratum energy or preserves
Energy promotes the hydrops of water-tight equipment and its upper end up, implements discharge opeing.
Water-tight equipment reaches well head, contacts with well head trip rod 25, and well head trip rod 25 promotes bypass valve rod 1 relative to close
Envelope equipment is moved down, and then opens bypass valve, and the locking bypass valve rod 1 of steel ball 2, by-pass prot is opened, wellhead shut-in, under water-tight equipment
OK.By the way, water-tight equipment back and forth moves up and down and realizes continuous draining.
It is appreciated that in the water-tight equipment that provides of the present invention, the quantity for being provided with black box is not limited to 1, can be with
The quantity of 2 or multiple black boies is set.
In the present embodiment, in order to improve the black box life-span, it is ensured that black box reliability, slip cap 7 is by metal material
Make, form hardware.
In order to ensure black box sealing property, the embodiment of the present invention includes multi-sealing structure.Incorporated by reference to Fig. 1 and refer to
Fig. 2, Fig. 2 are part A enlarged drawing in Fig. 1.
In the embodiment of the present invention one, the inner convex platform for inwardly stretching out is provided with the interior circular groove of slip cap 7, inner convex platform is by interior circular groove
It is divided into circular groove and short interior circular groove in long；The outer wall of interior fixed cover 8 arranges outwardly directed outer lug boss.Short interior circular groove is installed on interior fixation
In the outer lug boss of set 8.End face is formed between inner convex platform first end face (upper surface) and the first end face (lower surface) of outer lug boss close
Envelope coordinates M2.During water-tight equipment is up, under gas-liquid pressure effect, slip cap 7 has axial direction while being moved outwards
Upper shifting has upper shifting trend, and then makes inner convex platform first end face keep fitting with the first end face of outer lug boss, it is ensured that sealing coordinates
The sealing effectiveness of M2, it is to avoid or the pressure loss between reduction slip cap 7 and the mating surface of interior fixed cover 8, improve black box
Sealing effectiveness.
Fig. 1 is refer to again and refers to Fig. 2.In the embodiment of the present invention one, sealing shroud 5 is assemblied in circular groove in the length of slip cap 7
It is interior.The first end (being upper end in Fig. 1) of sealing shroud 5 is provided with step 51, the external cylindrical surface of step 51 and the inner cylinder face of inner convex platform
Form cylinder face seal and coordinate M3；Between the step bottom face of step 51 and the second end face (lower surface of inner convex platform) of inner convex platform
Form end face seal and coordinate M4；Form end face seal between the step top end face and the first end face of outer lug boss of step 51 to coordinate
M5.The outer wall of above-mentioned sealing cooperation and sealing shroud 5 and the inwall face seal of slip cap 7 coordinate M1 and the outer lug boss of interior fixed cover 8 the
End face coordinates M2 to realize the inner sealing of black box jointly with the first end face sealing of the inner convex platform of slip cap 7, and reduction passes through
The pressure loss in mutual gap between slip cap 7, sealing shroud 5, the three of interior fixed cover 8.It will be understood by those skilled in the art that according to
Being actually needed can also select one or more of which sealing to coordinate the sealing for realizing black box.
It is to be understood that sealing shroud 5 can be molectron, sealing shroud body can be hard material, sealing shroud outer surface, platform
The sealing positions such as rank bottom face, step top end face, step circles cylinder can be attached with soft material, and such as nonmetallic or other combinations are close
Seal structure form.
As shown in figure 1, the inwall of sealing shroud 5 is provided with radially-directed groove；It is convex that the outer wall of interior fixed cover 8 is provided with radially-directed
Rise, the radially-directed groove radially slides cooperation with radially-directed projection.When sealing shroud 5, slip cap 7 move radially reducing, by
It is relative in the radial position annexation of interior fixed cover 8, upper limit set 9, lower limit set 4,5 lobes of sealing shroud, 7 lobes of slip cap
It is fixed, i.e.,：Interior fixed cover 8 is connected with the radial direction teeth groove tooth muscle of upper limit set 9, lower limit set 4, is relatively fixed；The cunning of slip cap 7
Dynamic lobe upper and lower ends move radially foot and upper limit set 9, lower limit set 4, and radially inside teeth groove is moved radially to insert and is connected, phase
To fixation；The radially-directed groove of the sealing shroud 5 radially slides cooperation, the sealing of sealing shroud 5 with the radially-directed projection of interior fixed cover 8
Lobe split gap corresponding with slip cap 7 is corresponding all the time and keeps sealing relationship to be relatively fixed.This makes it possible to ensure close
Sealing property inside sealing assembly, good inner sealing performance guarantee black box outer wall is fitted all the time shaft in wall, is protected
Sealing effectiveness inside and out black box is demonstrate,proved.In the present embodiment one, it is provided with radially in the radially-directed of interior fixed cover 8 projection
Counterbore groove, the spring of elastic device 6 is arranged in radial direction counterbore groove.
It will be understood by those skilled in the art that the inwall of sealing shroud 5 is provided with, radially-directed is raised, and the outer wall of interior fixed cover 8 sets
Radially-directed groove is equipped with, and makes raised the formation and radially-directed groove between of radially-directed radially slide cooperation, equally can be realized
Move radially and circumferentially positioned function.
Fig. 1 is refer to, is had between the second end end face (lower end) and the inner face of the second stop collar 4 of sealing shroud 5 corresponding
Spacing；So, outside the end of sealing shroud 5 second, the not covered part in split gap between a lobe of sliding just forms air-liquid and enters
Mouth 11.During water-tight equipment is up, air-liquid body can just pass through the unsheltered split slided between a lobe of sealing shroud 5
Gap (gas-liquid import 11) acts on the inwall of sealing shroud 5 into the inner side of sealing shroud 5, make the outer wall of sealing shroud 5 and the inwall of slip cap 7,
The step top end face of sealing shroud 5 is brought into close contact with the outer lug boss of interior fixed cover 8, the inner convex platform of slip cap 7 and the outer lug boss of interior fixed cover 8, protects
The sealing effectiveness of card black box.
Fig. 7 is refer to, Fig. 7 is a kind of structural representation of water-tight equipment that the embodiment of the present invention two is provided.With embodiment
One water-tight equipment for providing is compared, and in the water-tight equipment that embodiment two is provided, black box is arranged in connecting rod 14, and is sealed
The interior fixed cover 8 of component is installed in rotation in connecting rod 14；The lower end of connecting rod 14 connects plug lower contact 15.Can manage
Solution, interior fixed cover 8 can keep fixing with connecting rod 14；In the case of the two holding is fixed, it is also possible to which the two is set to
Integral piece, to adapt to other hole conditions.It should be noted that：Because plug lower contact 15 does not have bypass valve in the water-tight equipment,
In the course of work, to be a difference in that and open and close phenomenon without by-pass prot.
When the water-tight equipment is up, in the presence of energy reserve or stratum energy, gas-liquid by inlet 11, into close
Inside sealing assembly, sealing between water-tight equipment and tubing wall, the sealing of water-tight equipment internal mechanism are realized, implement discharge opeing；When descending,
When downstream rate is slower, liquid phase actuating pressure is less, with the gap and own backlash of clashing into formation, is not enough to be formed
Sealing, in gas-liquid, voluntarily falls under self gravitation effect,.Because plug lower contact 15 is without by-pass prot, the water-tight equipment
Simple structure, and hidden danger point is reduced in running, improve reliability.
Refer to Fig. 8 and Fig. 9, Fig. 8 be the water-tight equipment that the embodiment of the present invention three is provided uplink state structural representation；
Fig. 9 is the downstream state structural representation of the water-tight equipment that the embodiment of the present invention three is provided.
The water-tight equipment that the embodiment of the present invention three is provided includes connecting rod and black box.Connecting rod includes connection spiral shell
Mother 17 and connecting screw rod 18.Attaching nut 17 is fixedly connected with the threaded upper ends of connecting screw rod 18, or and other are fixedly connected
Form；The upper limit plane S1 that the lower surface of attaching nut 17 is formed；The screw rod head upper surface of the bottom of connecting screw rod 18 forms ring-type
Lower limit plane S2；Black box is arranged between upper limit plane S1 and lower limit plane S2.In the present embodiment three, the first stop collar
Form sealing between the outer face of 9 (upper limit sets) and lower limit plane S2 to coordinate.
In the present embodiment three, seal component architecture with seal component architecture basic simlarity in embodiment one, and can be installed
Mode is overturned with black box above-below direction in embodiment one, i.e. upside-down mounting black box；And then it is located at the inner convex platform of slip cap 7
The outer lug boss top of interior fixed cover 8.The outer wall axial sliding fit of the inwall of interior fixed cover 8 and the connecting screw rod 18.The sealing
When equipment is up under the effect of external force traction drive, black box lower end contradicts lower limit plane S2, water-tight equipment top hydrops
Counteracting force, to sealing shroud 5 active force of downwardly and outwardly radial direction is applied, make black box play interior sealing, external seal and under
The effect of confined planes S2 end seals.So, the black box implements up discharge opeing under external force traction.In the embodiment, gas
Inner chamber from gas-liquid mouth 11 into black box of phase, liquid phase or solid phase or when having the trend into black box inner chamber, sealing group
Part is sealing state；It is non-tight over-current state when the black box is descending.
Water-tight equipment is up when carrying out discharge opeing operation under external force draw, the outer face of the first stop collar 9 and lower limit
Sealing between plane S2 coordinates, i.e., sealing is formed between black box and lower limit plane S2 and is coordinated, it is ensured that water-tight equipment is sealed
Performance, improves discharge opeing efficiency.
In the present embodiment three, upper limit plane S1 and lower limit plane S2 distances are more than black box axial length；It is solid in suit
Surely the outside wall surface of connecting screw rod 18 of set 8 is provided with through-flow groove 91；Have when black box upper end contradicts with upper limit plane S1 and connect
The passage gaps of groove 91 are flowed all.Such purpose is：When the water-tight equipment is descending, black box and upper limit plane S1
After contact, air-liquid can reach sealing by passage gaps between through-flow groove 91 and black box upper end and upper limit plane S1
Equipment top, water-tight equipment is descending smooth.
In the present embodiment three, the circulation groove 91 of connecting screw rod 18 is multi-head spiral groove；It is appreciated that, however not excluded that other shapes
The circulation groove of formula.Interior fixed cover 8 is provided with the clearance hole 81 of inside and outside communication, and clearance hole 81 and the mutual ditch of the through-flow groove 91
It is logical.Due to behavior non-tight over-current state under black box, the long-pending sand outside interior fixed cover 8 can be utilized by clearance hole 81
Through-flow groove 91 is discharged outside water-tight equipment, and then makes water-tight equipment have certain sediment outflow self-purification function, reduces stuck phenomenon,
Improve the reliability of water-tight equipment.When black box is up, form close between the lower surface of black box and lower limit plane S2
Envelope coordinates, and closes the leakage channel of clearance hole and through-flow groove 91, keeps the sealing of black box, and then can realize discharge opeing
Operation.
It is appreciated that interior fixed cover 8 can arrange multiple clearance holes 81, to ensure sand discharge function, self-cleaning properties is improved.Root
According to being actually needed, clearance hole 81 can be set at the position of easy product sand, such as clearance hole 81 can be arranged on the top of outer lug boss
With the correspondence position of sealing lobe, long-pending sand is substantially reduced to sealing and the adverse effect run.
The upper end grafting tooth muscle of interior fixed cover 8 upside is equipped with retainer ring 16, and the lower end grafting tooth muscle of interior fixed cover 8 downside is equipped with solid
Determine ring 16, there is radial direction teeth groove upper limit set 9 and the inner side of lower limit set 4, and are provided with interior step, install and assembling to facilitate.
Refer to Fig. 8 and Fig. 9, the sealing secondary combination of the lower limit plane S2 of the bottom of connecting screw rod 18 can for plane, sphere,
The conical surface or other combination sealing end faces, all should be within the scope of the present invention.
The course of work of the water-tight equipment that the embodiment three is provided is：
The attaching nut 17 of the water-tight equipment moves up under the effect of external force upwards, and black box is displaced downwardly to connection spiral shell
The lower limit plane S2 of bar 18.In the presence of air pressure or head of liquid, gas phase, liquid phase or solid phase enter sealing group from gas-liquid mouth 11
Part inner chamber, promotes sealing shroud 5 to be moved outwards or have outer shifting trend, the sealing slip cap 7 of sealing shroud 5；The external cylindrical surface of step 51 with
The inner cylinder face of inner convex platform forms cylinder face seal and coordinates M3；Sealing shroud 5 moves down or moves down trend while radial outward movement,
End face seal is formed between step bottom face and the second end face of inner convex platform and coordinates M4；The step top end face of step 51 and interior fixation
Cover and formed between the first end face of 8 outer lug boss end face seal and coordinate outside M5, the inner convex platform first end face of slip cap 7 and interior fixed cover 8
Boss first end face forms end face seal and coordinates M2, above-mentioned sealing to coordinate the inner sealing for completing black box jointly；It is internal close
The active force that envelope is formed, makes to be moved outside slip cap 7 or has outer shifting trend to coordinate with oil pipe or inner-walls of duct, in sealing oil pipe or pipeline
Wall；The transverse slot for mutually detaining a T-shaped lobe that slides of slip cap 7 forms gap sealing M6, and the outside that black box is completed jointly is close
Envelope；Now, the lower surface of black box forms end face seal with the lower limit plane S2 of the bottom of connecting screw rod 18.Water-tight equipment is close to
Duct wall seals oil pipe or pipeline, under the effect of external force upwards, moves on water-tight equipment and its upper gaseous phase, liquid phase or solid phase, row
Go out pit shaft hydrops, complete discharge opeing process.
When external force is downward, water-tight equipment is moved down, and is moved on black box, and gas phase, liquid phase or solid phase pass through connecting screw rod 18
Helicla flute, the clearance hole 81 of the inwall of interior fixed cover 8 and black box non-tight state and the gap that produces enters water-tight equipment
Top, reducing water-tight equipment moves down drag reduction, saves power consumption.By the reciprocal size and Orientation for changing active force,
The water-tight equipment realizes the purpose of continuous draining.Using the water-tight equipment, in the case of not having or gas phase amount is less, solve
Oil gas field or other pipeline discharge opeing efficiency it is low and because product sand and stuck problem.
According to foregoing description, it will be understood by those skilled in the art that interior fixed cover 8 is not limited to (be connected spiral shell with connecting rod
Bar 18) form rotation or/and be slidably matched, interior fixed cover 8 can also be fixedly linked or be integrated part with connecting rod；In sealing
When component is up, in the presence of air pressure or head of liquid, reducing sealing ensure that sealing, realize discharge opeing；In water-tight equipment
When descending, black box is in non-tight state, and water-tight equipment is smoothly descending.
It is appreciated that the water-tight equipment that the present invention is provided, quantity in use is not limited to 1, can arrange 2 or
The quantity of multiple water-tight equipments.
Based on foregoing description, it will be understood by those skilled in the art that above-mentioned black box can combine with miscellaneous part,
Corresponding water-tight equipment is formed, to realize corresponding purpose.
The above is only the preferred embodiment of the present invention, it is noted that for those skilled in the art come
Say, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (12)
1. a kind of black box, it is characterised in that including slip cap, sealing shroud, the first stop collar, the second stop collar and interior fixation
Set；First stop collar and the second stop collar are individually fixed in the two ends of interior fixed cover；
The slip cap is at least combined into by two lobes that slide, described to slide a lobe two ends respectively to move radially fit system peace
In being mounted in first stop collar and the second stop collar；The outer wall of the sealing shroud forms sealing with the internal face of the slip cap
Coordinate, the sealing shroud is at least combined into by two sealing lobes, and each split gap of a lobe that slides and a sealing
Prop up lobe corresponding；
The interior fixed cover outer wall arranges outwardly directed outer lug boss；The slip cap inwall is provided with the convex for inwardly stretching out
Platform；The outer lug boss first side coordinates with the first side end face seal of the inner convex platform.
2. black box according to claim 1, it is characterised in that the first end of the sealing shroud is provided with step, described
The external cylindrical surface of step forms cylinder face seal and coordinates with the inner cylinder face of the inner convex platform.
3. black box according to claim 2, it is characterised in that the step bottom face of the step and the inner convex platform
Second end face between formed end face seal coordinate.
4. black box according to claim 2, it is characterised in that the step top end face of the step and the outer lug boss
First end face formed end face seal coordinate.
5. the black box according to any one of Claims 1-4, it is characterised in that the interior fixed cover outer wall and described
Elastic device is provided between the inwall of sealing shroud.
6. the black box according to any one of Claims 1-4, it is characterised in that the second end end face of the sealing shroud
There is spacing between the first stop collar inner face or the second stop collar inner face.
7. the black box according to any one of Claims 1-4, it is characterised in that the sealing shroud inwall is provided with footpath
To gathering sill；It is raised that the interior fixed cover outer wall is provided with radially-directed；The radially-directed is raised with the radially-directed groove
Between radially slide cooperation；Or；
It is raised that the sealing shroud inwall is provided with radially-directed；The interior fixed cover outer wall is provided with radially-directed groove；The footpath
Cooperation is radially slided to guide protrusions with the radially-directed groove.
8. the black box according to any one of Claims 1-4, it is characterised in that at least partly it is described slide a lobe it
Between piece include that forming end face by lateral extension portions is slidingly sealed gap.
9. a kind of water-tight equipment, including connecting rod and black box, it is characterised in that black box is claim 1 to 8 times
Black box described in one；The interior fixed cover inwall coordinates or is integrated part with the outer wall of the connecting rod.
10. a kind of water-tight equipment, including connecting rod and black box, it is characterised in that black box is claim 1 to 8
Black box described in any one；The inner convex platform is located at outer lug boss top；The connecting rod arrange upper limit plane and
Lower limit plane；The interior fixed cover inwall of the black box and the outer wall rotatable engagement of the connecting rod；The black box
Between the upper limit plane and lower limit plane.
11. water-tight equipments according to claim 10, it is characterised in that the outer face of first stop collar with it is described under
Spacing face seal coordinates；The upper limit plane and lower limit crown to back are more than the black box axial length；The interior fixation
Cover the outer wall axial sliding fit of inwall and the connecting rod；Through-flow groove is provided with the outside wall surface of the connecting rod；
With the through-flow gap for connecting the through-flow groove when black box upper end contradicts with the upper limit plane.
12. water-tight equipments according to claim 11, it is characterised in that the interior fixation is arranged with the sediment outflow of inside and outside communication
Hole, and the clearance hole communicates with each other with the through-flow groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710140232.0A CN106677737A (en) | 2017-03-10 | 2017-03-10 | Sealing assembly and sealing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710140232.0A CN106677737A (en) | 2017-03-10 | 2017-03-10 | Sealing assembly and sealing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106677737A true CN106677737A (en) | 2017-05-17 |
Family
ID=58828723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710140232.0A Pending CN106677737A (en) | 2017-03-10 | 2017-03-10 | Sealing assembly and sealing equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106677737A (en) |
Cited By (3)
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|---|---|---|---|---|
| WO2019047867A1 (en) * | 2017-09-06 | 2019-03-14 | 刘书豪 | Fluid separating device and wellbore structure |
| CN112709687A (en) * | 2019-10-25 | 2021-04-27 | 成都百胜野牛科技有限公司 | Plunger piston |
| CN112727396A (en) * | 2020-12-30 | 2021-04-30 | 中石化石油工程技术服务有限公司 | Guide expansion type soluble bridge plug |
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Application publication date: 20170517 |