CN106285551A - Packer for sand washing concentric pipe - Google Patents
Packer for sand washing concentric pipe Download PDFInfo
- Publication number
- CN106285551A CN106285551A CN201610809358.8A CN201610809358A CN106285551A CN 106285551 A CN106285551 A CN 106285551A CN 201610809358 A CN201610809358 A CN 201610809358A CN 106285551 A CN106285551 A CN 106285551A
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- CN
- China
- Prior art keywords
- packer
- sand washing
- sealing member
- sand
- opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 239000004576 sand Substances 0.000 title claims abstract description 125
- 238000005406 washing Methods 0.000 title claims abstract description 72
- 238000007789 sealing Methods 0.000 claims abstract description 67
- 239000012530 fluid Substances 0.000 claims abstract description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 238000012856 packing Methods 0.000 claims description 37
- 238000004891 communication Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 230000002787 reinforcement Effects 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 abstract 1
- 238000011010 flushing procedure Methods 0.000 description 20
- 238000004140 cleaning Methods 0.000 description 16
- 241000283216 Phocidae Species 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 210000002445 nipple Anatomy 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229920002907 Guar gum Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229960002154 guar gum Drugs 0.000 description 1
- 235000010417 guar gum Nutrition 0.000 description 1
- 239000000665 guar gum Substances 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000010992 reflux 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
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/003—Means for stopping loss of drilling fluid
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses a packer for sand washing concentric pipes, which comprises: the outer wall of the outer tube is provided with a first limiting part and a second limiting part along the axial direction; the packer cover is established on the outer tube, and is located between first spacing portion and the spacing portion of second, it includes: the sealing element is limited by the supporting mechanism; the sealing element is in a hollow circular ring shape, and is provided with a first end part and a second end part which can be limited by the supporting mechanism, and a hollow cavity body positioned between the first end part and the second end part; wherein the inner diameter of the cavity is larger than the inner diameters of the first end part and the second end part; the sealing piece is matched with the supporting mechanism and the outer pipe to form a fluid channel which enables the cavity to be communicated with the outside. The packer for the sand washing concentric pipe, provided by the invention, can effectively block the oil leakage layer section, and is not easy to form sand blocking.
Description
Technical field
The present invention relates to oil-water well sand wash field of operation, particularly to a kind of sand washing concentric tube packer.
Background technology
Sandstone reservoir, it is a universal phenomenon that oil-water well shakes out, and degree of shaking out is by reservoir properties, granular cementation situation, note
The impact of the factors such as water intensity.
Along with the development process in oil field, most domestic old filed has been enter into the middle and late stage of oil field development, main productive formation
Section water injection time length, water injection intensity are big, shake out day by day serious, there is again shorting in various degree simultaneously, and cause reservoir pressure
Coefficient is low, thus cannot thoroughly be cleaned out by shaft bottom sand setting when causing sand washing operation, and its direct result is the effective sand setting in shaft bottom
Insufficient space, frequently occurs sand and buries oil reservoir, causes pump detection period to shorten, the frequent operation of oil well.Meanwhile, conventional sand washing operation is returned
Bring great construction risk, easily cause sand bury oil reservoir, sand card tubing string turn overhaul, sand washing do not return etc. many production unfavorable because of
Element.
Oil-water well sand wash operation is the routine operation of light maintenance operation, the sand-flushing pipe column used by present stage, sand flushing tool, sand washing
Equipment can substantially meet the sand washing operation of conventional oil well.
But, oil-water well is missed for low pressure, the most conventional way is to use the most stifled sand washing to reduce formation leakage amount
Increase the prop-carrying capacity of sand cleaning fluid simultaneously.The most stifled above-mentioned sand washing refers on conventional sand flushing tool and the basis of conventional sand washing operation
On, improve the performance of sand cleaning fluid, in sand cleaning fluid, add the diverting agents such as guar gum, play the effect of temporary occlusion leakage oil reservoir.But
Be the mode of above-mentioned temporarily stifled sand washing owing to existing costly, to shortcomings such as oil layer pollution are bigger, thus directly constrain this kind
Technology is in the active application of low-pressure absorption well sand flushing.
When there is High angle hole deviation section especially for low pressure leakage oil-water well, when carrying out sand washing in above-mentioned high angle hole
During operation, owing to its lower curved section exists " Boycott " effect so that sand washing process is increasingly difficult, the sand setting stirred from shaft bottom
Easily again deposit at lower curved section, form sand plug or sand bridge and cause tubing string sand card accident.Experimentation proves, concentric tube sand washing skill
Art can effectively solve low pressure leakage oil-water well, the particularly efficient sand washing problem when it exists High angle hole deviation section.
During utilizing concentric tube to carry out sand washing, need between sleeve pipe and sand washing concentric tube, to arrange packer, with reality
Closure leakage oil layer section in existing erosion process.But, the most conventional cup packer is during sand washing, and sand grains is easily at skin
Deposition in bowl-shape rubber seal, when on carry concentric sand-flushing pipe column time, be susceptible to sand card accident.Therefore, it is necessary to for institute
State concentric tube and propose a kind of special packer.
Summary of the invention
It is an object of the invention to provide a kind of sand washing concentric tube packer, it is possible to coordinate with concentric sand-flushing pipe column, in punching
During sand, effective closure leakage oil layer section, reduces sand cleaning fluid wastage, is not easily formed during improving sand washing efficiency, and use
Sand card.
The above-mentioned purpose of the present invention can use following technical proposal to realize:
A kind of sand washing concentric tube packer, described sand washing concentric tube is provided with outer tube, on the outer wall of described outer tube along
Axially arranged have the first limiting section, the second limiting section；
Described packer is set on described outer tube, and between described first limiting section and the second limiting section, described
Packer includes: can be with at least one supporting mechanism abutted against in described first limiting section or the second limiting section and pass through institute
State the sealing member that supporting mechanism is spacing；
Described sealing member is the circular of hollow, and described sealing member has can be by the spacing first end of described supporting mechanism
And the second end, and the hollow cavity between described first end and the second end；Wherein, the internal diameter of described cavity is big
In described first end, the internal diameter of the second end；
Described sealing member matches with described supporting mechanism, outer tube and is formed with the fluid that described cavity can be made to be in communication with the outside
Passage.
In a preferred embodiment, described supporting mechanism includes:
For the first retainer ring matched with the first end of described sealing member；
For the second retainer ring matched with the second end of described sealing member；
It is set in the support ring outside described outer tube and between described first retainer ring and the second retainer ring.
In a preferred embodiment, described sand washing concentric tube packer also includes:
It is arranged on the first packing ring between described first limiting section and described first retainer ring；
And it is arranged on the second packing ring between described second limiting section and described second retainer ring.
In a preferred embodiment, the sidewall of described support ring is provided with that the cavity with described sealing member connects opens
Mouthful,
During described packer setting, fluid is wrapped successively by the path of the cavity that described fluid passage enters described sealing member
Include and be connected: the first path between described first packing ring and described first retainer ring, the outer wall of described outer tube with described
Alternate path and opening between the inwall of pushing out ring.
In a preferred embodiment, described support ring includes main pipe and looped pipeline body, and described main pipe is provided with ring
Connected in star, described looped pipeline body is arranged in described annular groove, and accordingly, described opening includes being arranged on described main pipe
Main opening, and be arranged on described looped pipeline body, and the secondary opening being connected with described main opening, cavity；
The both ends of the surface of described looped pipeline body are formed with stopper slot between the inwall of the annular groove of described main pipe, are used for setting
Put first locating part spacing to described sealing member and the second locating part.
In a preferred embodiment, described first locating part or described second locating part generally torus, described
Being formed with projection on toric inwall, described projection is fastened in the stopper slot of described looped pipeline body and main pipe's formation, and institute
At least two face stating the first locating part or the second locating part can contact with described sealing member.
In a preferred embodiment, described support ring includes main pipe and looped pipeline body, and accordingly, described opening includes setting
Put the main opening on described main pipe, and be arranged on described looped pipeline body, and can be connected with described main opening, cavity
Secondary opening；
The inwall of described main pipe, described outer tube outer wall at least one is circumferentially arranged at intervals with for circulation stream
First guiding gutter of body, forms described alternate path by described first guiding gutter when described main pipe coordinates with described outer tube.
In a preferred embodiment, the number of described first guiding gutter is multiple, along between the circumference of described main pipe
Every layout, accordingly, described main opening, the secondary number of opening match with the number of described first guiding gutter；
Described packer has the first state and described main opening and institute that described main opening is staggered with described secondary opening
State the second state of secondary open communication.
In a preferred embodiment, in the interface that described first retainer ring, described first packing ring match at least
One is formed with the second guiding gutter, and described first retainer ring and described first packing ring form described the by described second guiding gutter
One path.
In a preferred embodiment, described sealing member is provided with reinforcement at described first end and the second end position
Muscle.
In a preferred embodiment, described outer tube includes main leg and the looped pipeline connected by the way of removably connecting
Section, wherein, described main leg is provided with described first limiting section, described looped pipeline section is provided with described second limiting section.
The features and advantages of the invention are: matching to be formed with supporting mechanism, outer tube by sealing member to make packer
The fluid passage that the cavity of sealing member is in communication with the outside.When carrying out well-flushing sand washing operation, sand cleaning fluid passes through described fluid passage
Enter the hollow cavity of described sealing member, thus realize the automatic setting of packer.When after described packer setting, described sealing
The inwall of the outer wall of part and described sleeve pipe is tightly fitted, it is achieved that blocks sand cleaning fluid and flows to down-hole, during i.e. realizing sand washing
Effectively closure leakage oil layer section, reduces the wastage of sand cleaning fluid, improves sand washing effect.
Further, the sealing member of described packer uses cryptomere sealing ring, when after described packer setting, and above-mentioned packing
The structure of device does not deposit sand position, is not easily formed sand card.When needs carry out rountrip, when above carrying concentric tube sand-flushing pipe column, by
Without the resistance of the material generation hard card such as sand grains in bladder seal, and sealing member has an elastic characteristic adapting to tube wall, comparatively speaking,
Rountrip pressure drag is less, it is simple to tripping out smoothly of tubing string, thus improves the safety of sand washing operation.
It addition, the application coordinates, by supporting mechanism and sealing member, installations, it is possible to effective control sealing member is in pressure difference
In the case of deformation quantity, it is ensured that reliability when described sealing member sets.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of concentric sand-flushing pipe column；
Fig. 2 is the structural representation of a kind of sand washing concentric tube；
Fig. 3 is the structural representation of sand washing concentric tube packer in a kind of embodiment of the application.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, technical scheme is elaborated, it should be understood that these
Embodiment is merely to illustrate the present invention rather than limits the scope of the present invention, after having read the present invention, this area skill
The amendment of the various equivalent form of values of the present invention is each fallen within the application claims limited range by art personnel.
It should be noted that when element is referred to as " being arranged at " another element, and it can be directly on another element
Or element placed in the middle can also be there is.When an element is considered as " connection " another element, and it can be to be directly connected to
To another element or may be simultaneously present centering elements.Term as used herein " vertical ", " level ", " on ",
For illustrative purposes only, being not offered as is unique embodiment for D score, "left", "right" and similar statement.
Unless otherwise defined, all of technology used herein and scientific terminology and the technical field belonging to the application
The implication that technical staff is generally understood that is identical.Term used in the description of the present application is intended merely to describe tool herein
The purpose of the embodiment of body, it is not intended that in limiting the application.Term as used herein "and/or" includes one or more
Arbitrary and all of combination of relevant Listed Items.
The present invention provides a kind of sand washing concentric tube packer, it is possible to coordinate with concentric sand-flushing pipe column, during sand washing
Effectively closure leakage oil layer section, reduces sand cleaning fluid wastage, improves sand washing efficiency.
Referring to Fig. 1, general, concentric sand-flushing pipe column can include sleeve pipe 40 and the oil pipe 30 being placed in sleeve pipe 40.Set
Oil jacket annular space 32 is formed between pipe 40 and oil pipe 30.The lower end of oil pipe 30 is sequentially connected with the sand washing for liquid stream conversion from top to bottom
Conversion 20, at least sand washing concentric tube 10 of pipe nipple, sand washing machine 70 and spy Fructus Amomi 80.It is same that the interior setting of sleeve pipe 40 lays respectively at sand washing
The upper self-packing packer 50 at the two ends up and down of heart pipe 10 and lower self-packing packer 60.Wherein, upper self-packing packer 50 can
To be positioned at the top of target oil reservoir, lower self-packing packer 60 may be located at the lower section of target oil reservoir.Additionally, the lower end of oil pipe 30
Can also install tubing centrilizer 92, concentric tube centralizer 94 can also be installed in the lower end of sand washing concentric tube 10, for one heart
Sand-flushing pipe column carries out righting.
Referring to Fig. 2, general, sand washing concentric tube 10 can include outer sand clean out pipe 120 and be placed in outer sand clean out pipe 120
Interior sand clean out pipe 110.Wherein, toroidal cavity 12 is formed between outer sand clean out pipe 120 and interior sand clean out pipe 110.The inner chamber of interior sand clean out pipe 110
Dock with the inner chamber of oil pipe 30.Oil jacket annular space 32 is connected with toroidal cavity 12 by sand washing conversion pipe nipple 20, is formed from top to bottom
Sand washing passage.Sand cleaning fluid in oil jacket annular space 32 flows into toroidal cavity 12 from top to bottom through sand washing conversion pipe nipple 20, then from ring
The lower opening of shape cavity 12 flows out.Visit Fructus Amomi 80, sand washing machine 70, the inner chamber of interior sand clean out pipe 110, the inner space of oil pipe 30,
Form reflux passage from bottom to top.Take the sand cleaning fluid of sand successively through visit Fructus Amomi 80, sand washing machine 70, the inner chamber of interior sand clean out pipe 110,
The inner chamber of oil pipe 30 flows out from bottom to top, thus sets up sand washing circulation.
On the whole, described when utilizing described concentric sand-flushing pipe column to carry out sand washing, upper self-packing packer 50 and lower self-sealing
Forming the sealing leakage section avoiding sand cleaning fluid to enter stratum between packer 60, the not direct stratum with distance of sand cleaning fluid connects
Touch, contact stratum in sand cleaning fluid only very small distance between lower self-packing packer 60 and sand setting bed 100, efficiently control
The wastage of sand cleaning fluid, improves sand washing efficiency.
But, at present, in use, sand grains is easy for described upper self-packing packer 50 and lower self-packing packer 60
Enter leather cup shape rubber seal, thus cause packer generation sand card phenomenon, be unfavorable for the carrying out of rountrip.
Referring to Fig. 3, the application embodiments, provides a kind of sand washing concentric tube packer.Wherein, described sand washing
Concentric tube is provided with outer tube 1, and the outer wall of described outer tube 1 is axially provided with first limiting section the 11, second limiting section 13.Institute
State packer to be set on described outer tube 1, and between described first limiting section 11 and the second limiting section 13, described packer
Including: can be with at least one supporting mechanism abutted against in described first limiting section 11 or the second limiting section 13 and by described
The sealing member 2 that supporting mechanism is spacing；Described sealing member 2 is the circular of hollow, and described sealing member 2 has can be by described support machine
First end that structure is spacing and the second end, and the hollow cavity between described first end and the second end；Wherein,
The internal diameter of described cavity is more than described first end, the internal diameter of the second end；Described sealing member 2 and described supporting mechanism, outer tube 1
Match and be formed with the fluid passage that described cavity can be made to be in communication with the outside.
In the present embodiment, the outer wall of the outer tube 1 of described sand washing concentric tube can be provided with the first limiting section 11.Institute
State the first limiting section 11 for matching with described packer, to limit described packer shift length upwards.Concrete, institute
Stating the first limiting section 11 can be the step formed on the outer wall of described outer tube 1.Additionally, described first limiting section 11 can also
For being arranged on the spacing ring etc. on the outer wall of described outer tube 1 by the way of removably connecting.Such as, described first limiting section 11
It can be the mode the being threaded connection annulus that is arranged on the outer wall of described outer tube 1.Certainly, described first limiting section 11 is also
Can be other forms, the local crowning etc. such as directly formed on the outer wall of described outer tube 1, the application make at this to have
The restriction of body.
In the present embodiment, the outer wall of the outer tube 1 of described sand washing concentric tube is also provided with the second limiting section 13.
Described second limiting section 13 is used for and packer matches, the displacement downward to limit described packer.Concrete, described
Second limiting section 13 can also be the step formed on the outer wall of described outer tube 1.Additionally, described second limiting section 13 can also
For being arranged on the spacing annulus etc. on the outer wall of described outer tube 1 by the way of removably connecting.Such as, described second limiting section
13 can be the annulus that the mode being threaded connection is arranged on the outer wall of described outer tube 1.Certainly, described second limiting section 13
Can also be other forms, the local crowning etc. such as directly formed on the outer wall of described outer tube 1, the application make at this
Concrete restriction.
In a specific embodiment, described outer tube 1 can be to include the master by arranging in the way of removably connecting
Pipeline section and looped pipeline section.Wherein, described main leg can be provided with described first limiting section 11.Can outside the upper end of described main leg
To be fixed in said inner tube with by inner and outer pipes 1 auxiliary connection, inner and outer pipes 1 connecting joint hoop.Described looped pipeline section can be provided with
Two limiting sections 13.The upper end of described looped pipeline section could be formed with described second limiting section 13, and the inner side of its lower end can be by interior
Outer tube 1 auxiliary connection is fixing on inner pipe.Wherein, the mode removably connected described in can be threaded, snap connection.
In the present embodiment, the first limiting section 11 of the sheathed described outer tube 1 of described packer and the second limiting section 13 it
Between.Described packer may include that sealing member 2, is arranged on the retainer ring at described sealing member 2 two ends and is arranged on described support
Packing ring between ring and described first locating part the 36, second locating part 37.
Wherein, described sealing member 2 can be cryptomere rubber seal, its generally hollow circular.Described sealing member 2
Have can by the spacing first end of described supporting mechanism and the second end, and be positioned at described first end and the second end it
Between hollow cavity；Wherein, the internal diameter of described cavity is more than described first end, the internal diameter of the second end, to form described capsule
Shape structure.
In the present embodiment, described sealing member 2 matches to be formed with described supporting mechanism, outer tube 1 and can make described chamber
The fluid passage that body is in communication with the outside.When carrying out well-flushing sand washing operation, sand cleaning fluid enters described close by described fluid passage
The hollow cavity of sealing 2, thus realize the automatic setting of packer.When after described packer setting, the outer wall of described sealing member 2
Tightly fit with the inwall of described sleeve pipe, it is achieved that block sand cleaning fluid and flow to down-hole.To sum up, sand washing described herein is concentric
Effective packer coordinates with concentric tube sand-flushing pipe column, it is possible to realize effectively closure leakage oil layer section, reduction sand washing during sand washing
The wastage of liquid, improves sand washing effect.
Further, the sealing member 2 of described packer uses cryptomere sealing ring and is formed between described packer and outer tube 1
Fluid passage be capable of automatic setting.In use, when, after described packer setting, the structure of above-mentioned packer is not deposited
Sand position, is not easily formed sand card.When needs carry out rountrip, when above carrying concentric tube sand-flushing pipe column, due in bladder seal 2
Without material generation hard card resistances such as sand grains, and sealing member 2 has the elastic characteristic adapting to tube wall, comparatively speaking, rountrip pressure reduction
Resistance is less, it is simple to tripping out smoothly of tubing string, thus improves the safety of sand washing operation.
In one embodiment, described supporting mechanism includes: be used for what the first end with described sealing member 2 matched
First retainer ring 31；For the second retainer ring 32 matched with the second end of described sealing member 2；It is set in described outer tube 1
Support ring 35 outward and between described first retainer ring 31 and the second retainer ring 32.
In the present embodiment, described first retainer ring 31 can be set in outside described first end.Concrete, described the
One retainer ring 31 can have a circular end face and enclose the annulus sidewall being located at outside described end face.Described first retainer ring 31 can
Fit tightly with the end face and outer surface with described first end, to limit the displacement of described first end, and increase
The rigidity of described first end.
In the present embodiment, described second retainer ring 32 can be set in outside described the second end.Concrete, described the
Two retainer rings 32 can have a circular bottom surface and enclose the annulus sidewall being located at outside described bottom surface.Described second retainer ring 32 can
Fit tightly with the end face and outer surface with described the second end, to limit the displacement of described the second end, and increase
The rigidity of described the second end.
In the present embodiment, described support ring 35 is set in the outside of described outer tube 1, is positioned at described first retainer ring 31
With second between retainer ring 32.Concrete, the upper surface of described support ring 35 can abut against with described first retainer ring 31, institute
The lower surface stating support ring 35 can abut against with described second retainer ring 32.
To sum up, in the application embodiment, formed by first retainer ring the 31, second retainer ring 32, support ring 35 etc.
Supporting mechanism coordinates installation with described sealing member 2, can effectively control the described sealing member 2 deformation quantity in the case of pressure difference.
Further, described packer can also include: is arranged on described first limiting section 11 and described first retainer ring
The first packing ring 33 between 31；And the second packing ring being arranged between described second limiting section 13 and described second retainer ring 32
34.The material of described first packing ring 33 and the second packing ring 34 can be that wearability is relatively strong and have the material such as rubber of predetermined elasticity
Matter, to extend the service life of described packer.
In one embodiment, the sidewall of described support ring 35 is provided with what the cavity with described sealing member 2 connected
Opening, during described packer setting, fluid is included successively by the path of the cavity that described fluid passage enters described sealing member 2
It is connected: the first path between described first packing ring 33 and described first retainer ring 31, the outer wall of described outer tube 1 are with described
Alternate path and opening between the inwall of support ring 35.
In the present embodiment, between described first packing ring 33 and described first retainer ring 31, it is formed with first passage,
It is formed with second channel, at the sidewall of described support ring 35 between inwall in the outer wall of described outer tube 1 and described support ring 35
On be provided with the opening that the cavity with described sealing member 2 connects.Described first passage, second channel, opening form packer certainly
Move fluid passage when setting.
Certainly, described first passage is not limited to be arranged between described first packing ring the 33, first retainer ring 31.Such as,
When being not provided with described first packing ring 33, described first passage can be arranged on described first limiting section 11 and hold with described first
Between filler ring 31.Additionally, the generation type of described first passage can also be other modes, the application does not make concrete at this
Limit.
Same, described second channel is not limited to the inwall of outer wall and the described support ring 35 being arranged on described outer tube 1
Between.For example, it is possible to be arranged in the tube wall of described outer tube 1.Certainly, the generation type of described second channel can also be it
His mode, the application does not make concrete restriction at this.
In a specific embodiment, described support ring 35 can include main pipe and looped pipeline body, described main pipe
On be provided with annular groove, described looped pipeline body is arranged in described annular groove, and accordingly, described opening includes being arranged on described
Main opening on main pipe, and be arranged on described looped pipeline body, and the secondary opening being connected with described main opening, cavity；Institute
The both ends of the surface stating looped pipeline body are formed with stopper slot between the inwall of the annular groove of described main pipe, are used for arranging described close
The first locating part 36 and the second locating part 37 that sealing 2 is spacing.
In the present embodiment, described support ring 35 can include main pipe and the looped pipeline body of nested setting.Wherein said
Inside annular groove it is provided with on the outer wall of main pipe.Described looped pipeline body is arranged in described annular groove.Concrete, described
The axial length of annular groove is longer than the length of described looped pipeline body, with the both ends of the surface at described looped pipeline body to the ring of described main pipe
It is formed with stopper slot between the inwall of connected in star.Described stopper slot is for arranging first locating part spacing to described sealing member 2
36 and second locating part 37.Wherein, described first locating part 36 or described second locating part 37 entirety can be torus, in institute
State and be formed with projection on toric inwall.Described projection is fastened in the stopper slot of described looped pipeline body and main pipe's formation, and
At least two face of described first locating part 36 or the second locating part 37 can contact with described sealing member 2, in order to described
It is spacing that the two ends of sealing member 2 carry out axial and circumferential.Such as, described first locating part 36 or the second locating part 37 deviate from described convex
The face risen matches with the inner surface of described sealing member 2, so that limit function is better achieved.Certainly, described first locating part 36
Or second the concrete form of locating part 37 can also be other forms, the application does not make concrete restriction at this.
When described support ring 35 can include main pipe and the looped pipeline body of nested setting, accordingly, described opening includes
It is arranged on the main opening on described main pipe, and is arranged on described looped pipeline body, and be connected with described main opening, cavity
Secondary opening, described main opening can be connected with described secondary opening.
Described support ring 35 includes main pipe and looped pipeline body, and accordingly, described opening includes being arranged on described main pipe
Main opening, and be arranged on described looped pipeline body, and the secondary opening being connected with described main opening, cavity；Described supervisor
The inwall of body, described outer tube 1 outer wall at least one is circumferentially arranged at intervals with the first guiding gutter for flow-through fluid,
Described alternate path is formed by described first guiding gutter when described main pipe coordinates with described outer tube 1.
In the present embodiment, the inwall of described main pipe can be arranged at intervals with lead for the first of flow-through fluid
Chute.When described main pipe coordinates with described outer tube 1, described alternate path can be formed by described first guiding gutter.
Or, the outer wall in described outer tube 1 can be arranged at intervals with the first guiding gutter for flow-through fluid.Described
When main pipe coordinates with described outer tube 1, described alternate path can be formed by described first guiding gutter.
Or, all it is arranged at intervals with for flow-through fluid on the inwall of described main pipe and on the outer wall of described outer tube 1
The first guiding gutter.Described main pipe be set in described outer tube 1 outer time, both formed first guiding gutters can be relative, formed
Described alternate path.
Further, when the number of described first guiding gutter is multiple, along the circumferentially-spaced layout of described main pipe, phase
Answering, described main opening, the secondary number of opening match with the number of described first guiding gutter；Described packer has described master
Second state of the first state that opening is staggered with described secondary opening and described main opening and described secondary open communication.
In the present embodiment, when the number of described first guiding gutter is multiple, advantageously ensure that packer quickly may be used
Self sealss are realized by ground.Wherein, described first guiding gutter is connected with the main opening on described main pipe.When described first water conservancy diversion
When groove is that circumferentially interval is arranged, described main opening and described first guiding gutter match and can also circumferentially be spaced cloth
Put.The number of described main opening can match with the number of described first guiding gutter.Additionally, the number of described secondary opening also may be used
Thinking multiple, concrete, the number of described secondary opening can be less than or equal to described first guiding gutter or the number of described main opening.
Preferably, the number of described secondary opening can be identical with the number of described main opening, passes through with being beneficial to pressure liquid fast and reliable
Multiple passages inject in cavity, thus realize setting.
In the present embodiment, described packer have the first state that described main opening is staggered with described secondary opening and
Described main opening and the second state of described secondary open communication.When under described concentric sand-flushing pipe column lower going-into-well, described main opening
May be at, with described secondary opening, the first state of staggering, thus ensure when described communication sand-flushing pipe column is under lower going-into-well, described
Packer will not realize sealing by mistake.Postpone to specific bit when entering under described concentric sand-flushing pipe column, described concentric sand washing can be rotated
Pipe predetermined angular so that described main opening and described secondary opening in communication, and then when well-flushing, described packer realizes from close
Envelope.
In one embodiment, in the interface that described first retainer ring 31, described first packing ring 33 match extremely
Few one is formed with the second guiding gutter, and described first retainer ring 31 is formed by described second guiding gutter with described first packing ring 33
Described first path.
In the present embodiment, the upper surface at described first retainer ring 31 could be formed with the second guiding gutter, and described
The number of two guiding gutters can match with described first guiding gutter.Such as, the number of described second guiding gutter can be with described
The number of the first guiding gutter is identical.The plurality of second guiding gutter is along the circumferentially-spaced layout of described first retainer ring 31.Institute
State when the first retainer ring 31 coordinates with described first packing ring 33 and form described first path.
Or, the lower surface at described first packing ring 33 could be formed with the second guiding gutter, described second guiding gutter
Number can match with described first guiding gutter.Such as, the number of described second guiding gutter can be with described first guiding gutter
Number is identical.The plurality of second guiding gutter is along the circumferentially-spaced layout of described first packing ring 33.Described first retainer ring 31
Described first path is formed when coordinating with described first packing ring 33.
Or, all it is formed with second leads at the upper surface of described first retainer ring 31 and the lower surface of described first packing ring 33
Chute.Described first retainer ring 31 forms described first path when coordinating with described first packing ring 33.
In one embodiment, described sealing member 2 is provided with reinforcement at described first end and the second end position
4。
In the present embodiment, described sealing member 2 can be provided with reinforcement at described first end and the second end position
Muscle 4, to improve the rigidity of described first end and the second end, thus improves the bearing capacity of described sealing member 2.
Each embodiment above-mentioned in this specification all uses the mode gone forward one by one to describe, identical between each embodiment
Similar portion is cross-referenced, and what each embodiment stressed is and other embodiment differences.
The foregoing is only several embodiments of the invention, although the embodiment that disclosed herein as above, but institute
State content only to facilitate the embodiment that understands the present invention and use, be not intended to limit the present invention.Any institute of the present invention
Belong to those skilled in the art, on the premise of without departing from the spirit and scope that disclosed herein, can be at embodiment
And make any amendment and change in details in form, but the scope of patent protection of the present invention, still must be with claims
Book is defined in the range of standard.
Claims (11)
1. a sand washing concentric tube packer, it is characterised in that described sand washing concentric tube is provided with outer tube, outside described outer tube
The first limiting section, the second limiting section axially it is provided with on wall；
Described packer is set on described outer tube, and between described first limiting section and the second limiting section, described packing
Device includes: can be with at least one supporting mechanism abutted against in described first limiting section or the second limiting section and by described
The sealing member that support mechanism is spacing；
Described sealing member is the circular of hollow, and described sealing member has can be by the spacing first end and of described supporting mechanism
Two ends, and the hollow cavity between described first end and the second end；Wherein, the internal diameter of described cavity is more than institute
State the internal diameter of first end, the second end；
Described sealing member match with described supporting mechanism, outer tube be formed described cavity can be made to be in communication with the outside fluid lead to
Road.
2. sand washing concentric tube packer as claimed in claim 1, it is characterised in that described supporting mechanism includes:
For the first retainer ring matched with the first end of described sealing member；
For the second retainer ring matched with the second end of described sealing member；
It is set in the support ring outside described outer tube and between described first retainer ring and the second retainer ring.
3. sand washing concentric tube packer as claimed in claim 2, it is characterised in that also include:
It is arranged on the first packing ring between described first limiting section and described first retainer ring；
And it is arranged on the second packing ring between described second limiting section and described second retainer ring.
4. sand washing concentric tube packer as claimed in claim 3, it is characterised in that be provided with on the sidewall of described support ring
The opening connected with the cavity of described sealing member,
During described packer setting, fluid includes phase successively by the path of the cavity that described fluid passage enters described sealing member
Connection: the first path, the outer wall of described outer tube and the described support ring between described first packing ring and described first retainer ring
Inwall between alternate path and opening.
5. sand washing concentric tube packer as claimed in claim 4, it is characterised in that described support ring includes main pipe and pair
Body, described main pipe is provided with annular groove, and described looped pipeline body is arranged in described annular groove, accordingly, described in open
Mouth includes the main opening that is arranged on described main pipe, and is arranged on described looped pipeline body, and with described main opening, cavity phase
The secondary opening of connection；
The both ends of the surface of described looped pipeline body are formed with stopper slot between the inwall of the annular groove of described main pipe, and it is right to be used for arranging
The first locating part that described sealing member is spacing and the second locating part.
6. sand washing concentric tube packer as claimed in claim 5, it is characterised in that described first locating part or described second
Locating part generally torus, is formed with projection on described toric inwall, described projection be fastened on described looped pipeline body with
In the stopper slot that main pipe is formed, and at least two face of described first locating part or the second locating part can be with described sealing member phase
Contact.
7. sand washing concentric tube packer as claimed in claim 4, it is characterised in that described support ring includes main pipe and pair
Body, accordingly, described opening includes the main opening being arranged on described main pipe, and is arranged on described looped pipeline body, and
The secondary opening being connected with described main opening, cavity；
The inwall of described main pipe, described outer tube outer wall at least one is circumferentially arranged at intervals with for flow-through fluid
First guiding gutter, forms described alternate path by described first guiding gutter when described main pipe coordinates with described outer tube.
8. sand washing concentric tube packer as claimed in claim 7, it is characterised in that the number of described first guiding gutter is many
Individual, along the circumferentially-spaced layout of described main pipe, accordingly, described main opening, the number of secondary opening and described first water conservancy diversion
The number of groove matches；
Described packer has the first state and described main opening and described pair that described main opening is staggered with described secondary opening
Second state of open communication.
9. sand washing concentric tube packer as claimed in claim 4, it is characterised in that described first retainer ring, described first
At least one in the interface that packing ring matches is formed with the second guiding gutter, and described first retainer ring leads to described first packing ring
Cross described second guiding gutter and form described first path.
10. sand washing concentric tube packer as claimed in claim 1, it is characterised in that described sealing member is at described first end
Portion and the second end position are provided with reinforcement.
11. sand washing concentric tube packers as claimed in claim 1, it is characterised in that
Described outer tube includes main leg and the looped pipeline section connected by the way of removably connecting, and wherein, described main leg sets
It is equipped with described first limiting section, described looped pipeline section is provided with described second limiting section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610809358.8A CN106285551B (en) | 2016-09-08 | 2016-09-08 | Packer for sand washing concentric pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610809358.8A CN106285551B (en) | 2016-09-08 | 2016-09-08 | Packer for sand washing concentric pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106285551A true CN106285551A (en) | 2017-01-04 |
| CN106285551B CN106285551B (en) | 2018-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610809358.8A Active CN106285551B (en) | 2016-09-08 | 2016-09-08 | Packer for sand washing concentric pipe |
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| Country | Link |
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| CN (1) | CN106285551B (en) |
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| CN106681383A (en) * | 2017-01-23 | 2017-05-17 | 中国科学院理化技术研究所 | High-precision pressure control device |
| CN107165590A (en) * | 2017-06-08 | 2017-09-15 | 石明 | Pollution-free lost circulation prevention sand flushing device and application method |
| CN109025892A (en) * | 2018-08-16 | 2018-12-18 | 中国石油天然气股份有限公司 | Sand washing and leakage testing method below casing transformation point of casing transformation well |
| CN110566144A (en) * | 2019-09-27 | 2019-12-13 | 中石化石油工程技术服务有限公司 | Leakage-proof sand washing method and sand washing pipe column |
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| CN110566144B (en) * | 2019-09-27 | 2021-08-17 | 中石化石油工程技术服务有限公司 | Leakage-proof sand washing method and sand washing pipe column |
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| Publication number | Publication date |
|---|---|
| CN106285551B (en) | 2018-08-14 |
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