CN106285551B - Packer for sand washing concentric pipe - Google Patents
Packer for sand washing concentric pipe Download PDFInfo
- Publication number
- CN106285551B CN106285551B CN201610809358.8A CN201610809358A CN106285551B CN 106285551 B CN106285551 B CN 106285551B CN 201610809358 A CN201610809358 A CN 201610809358A CN 106285551 B CN106285551 B CN 106285551B
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- China
- Prior art keywords
- packer
- sand washing
- sealing element
- sand
- outer tube
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- 239000004576 sand Substances 0.000 title claims abstract description 128
- 238000005406 washing Methods 0.000 title claims abstract description 72
- 238000007789 sealing Methods 0.000 claims abstract description 66
- 239000012530 fluid Substances 0.000 claims abstract description 38
- 238000012856 packing Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 238000011010 flushing procedure Methods 0.000 description 20
- 238000004140 cleaning Methods 0.000 description 17
- 241000283216 Phocidae Species 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 210000002445 nipple Anatomy 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920002907 Guar gum Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 238000006243 chemical reaction Methods 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
- 239000003129 oil well Substances 0.000 description 1
- 230000000750 progressive effect Effects 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, more particularly to a kind of sand washing effective packer with one heart.
Background technology
Sandstone reservoir, it is a universal phenomenon that oil-water well, which shakes out, and degree of shaking out is by reservoir properties, granular cementation situation, note
The influence of the factors such as water intensity.
With the development process in oil field, most domestic old filed has been enter into the middle and later periods of oil field development, main productive formation
Section water injection time is long, water injection intensity is big, getting worse of shaking out, while being shorted again in the presence of different degrees of, and causes reservoir pressure
Coefficient is low, and so as to cause can not be clean by shaft bottom sand setting thorough cleaning when sand washing operation, direct result be the effective sand setting in shaft bottom
Insufficient space frequently occurs sand and buries oil reservoir, pump detection period is caused to shorten, the frequent operation of oil well.Meanwhile returning conventional sand washing operation
Bring great construction risk, easily cause sand bury oil reservoir, sand card tubing string turn overhaul, sand washing do not return etc. many productions it is unfavorable because
Element.
Oil-water well sand wash operation is the routine operation of light maintenance operation, at this stage sand-flushing pipe column used, sand flushing tool, sand washing
Equipment can substantially meet the sand washing operation of conventional oil-water well.
However, missing oil-water well for low pressure, currently used way reduces formation leakage amount using temporary stifled sand washing
Increase the prop-carrying capacity of sand cleaning fluid simultaneously.Above-mentioned temporarily stifled sand washing refers to the basis in conventional sand flushing tool and conventional sand washing operation
On, improve the performance of sand cleaning fluid, the diverting agents such as guar gum are added into sand cleaning fluid, plays the role of temporarily blocking leakage oil reservoir.But
Be above-mentioned temporarily stifled sand washing mode due to there are the shortcomings of costly, larger to oil layer pollution, it is such to directly constrain
Technology is in the active application of low-pressure absorption well sand flushing.
Especially for low pressure leakage oil-water well there are when High angle hole deviation section, when carrying out sand washing in above-mentioned high angle hole
When operation, because there is " Boycott " effect in its lower curved section so that sand washing process is more difficult, the sand setting stirred from shaft bottom
It is easily deposited again in lower curved section, forms sand plug or sand bridge and cause tubing string sand card accident.Experimental study proves, concentric tube sand washing skill
Art can effectively solve low pressure leakage oil-water well, the especially efficient sand washing when it has High angle hole deviation section.
During carrying out sand washing using concentric tube, need that packer is arranged between casing and sand washing concentric tube, with reality
Leakage oil layer section is blocked in existing erosion process.However, during sand washing, sand grains is easy in skin conventional cup packer at present
Deposition, when above carrying concentric sand-flushing pipe column, is easy to happen sand card accident in bowl-shape rubber seal.Therefore, it is necessary to for institute
It states concentric tube and proposes a kind of dedicated packer.
Invention content
The object of the present invention is to provide a kind of sand washing effective packers with one heart, can coordinate with concentric sand-flushing pipe column, rush
Leakage oil layer section is effectively blocked during sand, reduces sand cleaning fluid wastage, improves sand washing efficiency, and be not easy to be formed during use
Sand card.
Following technical proposal can be used to realize in the above-mentioned purpose of the present invention：
A kind of sand washing effective packer with one heart, the sand washing concentric tube are provided with outer tube, on the outer wall of the outer tube along
Axially it is provided with the first limiting section, the second limiting section；
The packer is set on the outer tube, and between first limiting section and the second limiting section, described
Packer includes：The supporting mechanism that can be abutted against at least one of first limiting section or the second limiting section and pass through institute
State the sealing element of supporting mechanism limit；
The sealing element is hollow annular shape, and the sealing element has the first end that can be limited by the supporting mechanism
And the second end, and the hollow cavity between the first end and the second end；Wherein, the internal diameter of the cavity is big
In the first end, the internal diameter of the second end；
The sealing element matches the fluid for being formed with and the cavity capable of being made to be in communication with the outside with the supporting mechanism, outer tube
Channel.
In a preferred embodiment, the supporting mechanism includes：
For with matched first retainer ring of the first end of the sealing element；
For with matched second retainer ring of the second end of the sealing element；
It is set in that the outer tube is outer and the support ring between first retainer ring and the second retainer ring.
In a preferred embodiment, effective packer further includes with one heart for the sand washing：
The first washer being arranged between first limiting section and first retainer ring；
And the second packing ring being arranged between second limiting section and second retainer ring.
In a preferred embodiment, it is provided on the side wall of the support ring and is opened with what the cavity of the sealing element was connected to
Mouthful,
When the packer setting, the path that fluid enters the cavity of the sealing element by the fluid channel is wrapped successively
It includes and is connected：The outer wall of the first access, the outer tube between first washer and first retainer ring and the branch
Alternate path and opening between the inner wall of pushing out ring.
In a preferred embodiment, the support ring includes main pipe and looped pipeline body, and ring is provided on the main pipe
Connected in star, the looped pipeline body are arranged in the annular groove, correspondingly, the opening includes being arranged on the main pipe
Main opening, and be arranged on the looped pipeline body, and the pair being connected with the main opening, cavity is open；
It is formed with limiting slot between the inner wall of annular groove of the both ends of the surface of the looped pipeline body to the main pipe, for setting
Set the first locating part and the second locating part limited to the sealing element.
In a preferred embodiment, first locating part or second locating part generally torus, described
Protrusion is formed on the inner wall of torus, the protrusion is fastened in the limiting slot that the looped pipeline body is formed with main pipe, and institute
Stating at least two faces of the first locating part or the second locating part can be in contact with the sealing element.
In a preferred embodiment, the support ring includes main pipe and looped pipeline body, correspondingly, the opening includes setting
The main opening on the main pipe is set, and is arranged on the looped pipeline body, and can be connected with the main opening, cavity
Pair opening；
The inner wall of the main pipe, the outer tube outer wall at least one be circumferentially arranged at intervals with for circulation stream
First diversion trench of body, by first return guide trough at the alternate path when main pipe coordinates with the outer tube.
In a preferred embodiment, the number of first diversion trench is multiple, between the circumferential direction along the main pipe
Every arrangement, correspondingly, the main opening, the number of secondary opening and the number of first diversion trench match；
The packer has the main opening and the secondary first state being staggered and the main opening and the institute of being open
State the second state of secondary open communication.
In a preferred embodiment, in first retainer ring, the matched interface of the first washer at least
One is formed with the second diversion trench, and first retainer ring and first washer are by second return guide trough at described the
One access.
In a preferred embodiment, the sealing element is provided with reinforcement in the first end and the second end position
Muscle.
In a preferred embodiment, the outer tube includes the main leg connected by way of being detachably connected and looped pipeline
Section, wherein be provided with first limiting section on the main leg, second limiting section is provided in the looped pipeline section.
The features and advantages of the invention are：It matches to be formed with supporting mechanism, outer tube by sealing element and can make packer
The fluid channel that the cavity of sealing element is in communication with the outside.When carrying out well-flushing sand washing operation, sand cleaning fluid passes through the fluid channel
Into the hollow cavity of the sealing element, to realize the automatic setting of packer.After the packer setting, the sealing
The outer wall of part is tightly bonded with the inner wall of described sleeve pipe, realizes and sand cleaning fluid is blocked to be flowed to underground, i.e., during realization sand washing
Leakage oil layer section is effectively blocked, the wastage of sand cleaning fluid is reduced, improves sand washing effect.
Further, the sealing element of the packer uses cryptomere sealing ring, after the packer setting, above-mentioned packing
The structure of device does not deposit sand position, is not easy to form sand card.When need carry out rountrip, when above carrying concentric tube sand-flushing pipe column, by
In hard card resistance, and characteristic of the sealing element with elasticity adaptation tube wall occurs without substances such as sand grains in bladder seal, in contrast,
Rountrip pressure drag is smaller, smoothly rises convenient for tubing string, to improve the safety of sand washing operation.
In addition, the application is installed by the cooperation of supporting mechanism and sealing element, sealing element can be effectively controlled in pressure difference
In the case of deformation quantity, ensure the reliability when sealing element is set.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of concentric sand-flushing pipe column；
Fig. 2 is a kind of structural schematic diagram of sand washing concentric tube；
Fig. 3 is the structural schematic diagram of sand washing effective packer with one heart in a kind of embodiment of the application.
Specific implementation mode
Below in conjunction with the drawings and specific embodiments, elaborate to technical scheme of the present invention, it should be understood that these
Embodiment is only illustrative of the invention and is not intended to limit the scope of the invention, after having read the present invention, this field skill
Art personnel each fall in the application range as defined in the appended claims the modification of the various equivalent forms of the present invention.
It should be noted that when element is referred to as " being set to " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", "upper",
"lower", "left", "right" and similar statement for illustrative purposes only, are not offered as being unique embodiment.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the application
The normally understood meaning of technical staff is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.Term as used herein "and/or" includes one or more
Any and all combinations of relevant Listed Items.
The present invention provides a kind of sand washing effective packer with one heart, can coordinate with concentric sand-flushing pipe column, during sand washing
Leakage oil layer section is effectively blocked, sand cleaning fluid wastage is reduced, improves sand washing efficiency.
Referring to Fig. 1, in general, sand-flushing pipe column may include casing 40 and the oil pipe 30 that is placed in casing 40 with one heart.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 the sand washing converted for liquid stream from top to bottom
It converts pipe nipple 20, at least a sand washing concentric tube 10, sand washing machine 70 and visits sand head 80.It is same to be located at sand washing for setting in casing 40
The upper self-packing packer 50 of the upper and lower ends of heart pipe 10 and lower self-packing packer 60.Wherein, upper self-packing packer 50 can
With positioned at the top of target oil reservoir, lower self-packing packer 60 can be located at the lower section of target oil reservoir.In addition, the lower end of oil pipe 30
Tubing centrilizer 92 can also be installed, the lower end of sand washing concentric tube 10 can also install concentric tube centralizer 94, for concentric
Sand-flushing pipe column carries out righting.
Referring to Fig. 2, in general, sand washing concentric tube 10 may 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 cavity of interior sand clean out pipe 110
It is docked with the inner cavity of oil pipe 30.Oil jacket annular space 32 is converted pipe nipple 20 by sand washing and is connected to toroidal cavity 12, is formed from top to bottom
Sand washing channel.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.The inner cavity connection of sand head 80, sand washing machine 70, the inner cavity of interior sand clean out pipe 110, oil pipe 30 is visited,
Form reflux passage from bottom to top.Take the sand cleaning fluid of sand successively through visit sand head 80, sand washing machine 70, interior sand clean out pipe 110 inner cavity,
The inner cavity of oil pipe 30 is flowed out from bottom to top, to establish sand washing cycle.
On the whole, described when carrying out sand washing using the concentric sand-flushing pipe column, upper self-packing packer 50 and lower self-sealing
The sealing leakage section for avoiding sand cleaning fluid from entering stratum is formed between packer 60, the not direct stratum with long range of sand cleaning fluid connects
It touches, sand cleaning fluid contiguously layer in the very little distance only between lower self-packing packer 60 and sand setting bed 100 efficiently controls
The wastage of sand cleaning fluid improves sand washing efficiency.
However, currently, the upper self-packing packer 50 and lower self-packing packer 60 in use, sand grains be easy
Into leather cup shape rubber seal, sand card phenomenon occurs so as to cause packer, is unfavorable for the progress of rountrip.
Referring to Fig. 3, embodiments, provides a kind of sand washing effective packers with one heart by the application.Wherein, the sand washing
Concentric tube is provided with outer tube 1, and the first limiting section 11, the second limiting section 13 are axially provided on the outer wall of the outer tube 1.Institute
It states packer to be set on the outer tube 1, and between first limiting section, 11 and second limiting section 13, the packer
Including：The supporting mechanism that can be abutted against at least one of first limiting section, 11 or second limiting section 13 and by described
The sealing element 2 of supporting mechanism limit；The sealing element 2 is hollow annular shape, and the sealing element 2 has can be by the support machine
The first end and the second end of structure limit, and the hollow cavity between the first end and the second end；Wherein,
The internal diameter of the cavity is more than the internal diameter of the first end, the second end；The sealing element 2 and the supporting mechanism, outer tube 1
Match the fluid channel for being formed with and the cavity capable of being made to be in communication with the outside.
In the present embodiment, the first limiting section 11 can be provided on the outer wall of the outer tube 1 of the sand washing concentric tube.Institute
State the first limiting section 11 for and the packer match, to limit the upward shift length of the packer.Specifically, institute
It can be the step formed on the outer wall of the outer tube 1 to state the first limiting section 11.In addition, first limiting section 11 can also
For the spacing ring etc. on the outer wall of the outer tube 1 is arranged by way of being detachably connected.For example, first limiting section 11
It can be the annulus that the mode being connected through a screw thread is arranged on the outer wall of the outer tube 1.Certainly, first limiting section 11 is gone back
Can be other forms, such as the local crowning etc. directly formed on the outer wall of the outer tube 1, the application does not make to have herein
The restriction of body.
In the present embodiment, it is also provided with the second limiting section 13 on the outer wall of the outer tube 1 of the sand washing concentric tube.
Second limiting section 13 is used for and packer matches, to limit the downward displacement distance of the packer.Specifically, described
Second limiting section 13 or the step formed on the outer wall of the outer tube 1.In addition, second limiting section 13 can also
For the limit annulus etc. being arranged by way of being detachably connected on the outer wall of the outer tube 1.For example, second limiting section
13 can be the annulus that the mode being connected through a screw thread is arranged on the outer wall of the outer tube 1.Certainly, second limiting section 13
Can also be other forms, such as the local crowning etc. directly formed on the outer wall of the outer tube 1, the application do not make herein
It is specific to limit.
In a specific embodiment, the outer tube 1 may include the master being arranged by way of being detachably connected
Pipeline section and looped pipeline section.Wherein, the main leg can be provided with first limiting section 11.It can on the outside of the upper end of the main leg
To connect hoop with by 1 auxiliary connection of inner and outer pipes, inner and outer pipes 1 and be fixed in said inner tube.The looped pipeline section can be provided with
Two limiting sections 13.The upper end of the looped pipeline section could be formed with second limiting section 13, and the inside of lower end can be by interior
1 auxiliary connection of outer tube is fixed on inner pipe.Wherein, the mode being detachably connected can be to be threadedly coupled, snap connection.
In the present embodiment, the packer be arranged the outer tube 1 the first limiting section 11 and the second limiting section 13 it
Between.The packer may include：Sealing element 2 is arranged in the retainer ring at 2 both ends of the sealing element and setting in the support
Washer between ring and first locating part 36, the second locating part 37.
Wherein, the sealing element 2 can be cryptomere rubber seal, generally hollow annular shape.The sealing element 2
With the first end and the second end that can be limited by the supporting mechanism, and positioned at the first end and the second end it
Between hollow cavity；Wherein, the internal diameter of the cavity is more than the internal diameter of the first end, the second end, to form the capsule
Shape structure.
In the present embodiment, the sealing element 2 matches to be formed with the supporting mechanism, outer tube 1 can make the chamber
The fluid channel that body is in communication with the outside.When carrying out well-flushing sand washing operation, sand cleaning fluid is entered described close by the fluid channel
The hollow cavity of sealing 2, to realize the automatic setting of packer.After the packer setting, the outer wall of the sealing element 2
It is tightly bonded with the inner wall of described sleeve pipe, realizes and sand cleaning fluid is blocked to be flowed to underground.To sum up, sand washing described herein is concentric
Effective packer coordinates with concentric tube sand-flushing pipe column, can realize effective closure leakage oil layer section during sand washing, reduce sand washing
The wastage of liquid improves sand washing effect.
Further, the sealing element 2 of the packer is formed using cryptomere sealing ring and between the packer and outer tube 1
Fluid channel can realize automatic setting.When in use, after the packer setting, the structure of above-mentioned packer is not deposited
Sand position is not easy to form sand card.When needing to carry out rountrip, when above carrying concentric tube sand-flushing pipe column, due in bladder seal 2
Hard card resistance occurs for the substances such as no sand grains, and sealing element 2 has the characteristic that elasticity adapts to tube wall, in contrast, rountrip pressure difference
Resistance is smaller, smoothly rises convenient for tubing string, to improve the safety of sand washing operation.
In one embodiment, the supporting mechanism includes：For matched with the first end of the sealing element 2
First retainer ring 31；For with matched second retainer ring of the second end of the sealing element 2 32；It is set in the outer tube 1
The outer and support ring 35 between first retainer ring, 31 and second retainer ring 32.
In the present embodiment, first retainer ring 31 can be set in outside the first end.Specifically, described
One retainer ring 31 can be with a circular top surface and the annulus side wall being disposed around outside the top surface.First retainer ring 31 can
It is fitted closely with the end face and outer surface with the first end, to limit the displacement of the first end, and is increased
The rigidity of the first end.
In the present embodiment, second retainer ring 32 can be set in outside the second end.Specifically, described
Two retainer rings 32 can be with a circular bottom surface and the annulus side wall being disposed around outside the bottom surface.Second retainer ring 32 can
It is fitted closely with the end face and outer surface with the second end, to limit the displacement of the second end, and is increased
The rigidity of the second end.
In the present embodiment, the support ring 35 is set in the outside of the outer tube 1, is located at first retainer ring 31
And second between retainer ring 32.Specifically, the upper surface of the support ring 35 can be abutted against with first retainer ring 31, institute
Stating the lower face of support ring 35 can abut against with second retainer ring 32.
To sum up, in the application embodiment, pass through the formation such as the first retainer ring 31, the second retainer ring 32, support ring 35
The cooperation of supporting mechanism and the sealing element 2 is installed, can effectively control the sealing element 2 in the case that pressure difference deformation quantity.
Further, the packer can also include：It is arranged in first limiting section 11 and first retainer ring
The first washer 33 between 31；And the second packing ring being arranged between second limiting section 13 and second retainer ring 32
34.The material of first washer 33 and second packing ring 34 can be that wearability is relatively strong and the materials such as rubber with predetermined elasticity
Matter, to extend the service life of the packer.
In one embodiment, it is provided on the side wall of the support ring 35 and to be connected to the cavity of the sealing element 2
Opening, when the packer setting, the path that fluid enters the cavity of the sealing element 2 by the fluid channel includes successively
It is connected：The outer wall of the first access, the outer tube 1 between first washer 33 and first retainer ring 31 with it is described
Alternate path and opening between the inner wall of support ring 35.
In the present embodiment, it is formed with first passage between first washer 33 and first retainer ring 31,
It is formed with second channel between inner wall in the outer wall of the outer tube 1 and the support ring 35, in the side wall of the support ring 35
On be provided with the opening being connected to the cavity of the sealing element 2.The first passage, second channel, opening form packer certainly
Move fluid channel when setting.
Certainly, the first passage is not limited to be arranged between first washer 33, the first retainer ring 31.For example,
When being not provided with first washer 33, the first passage can be arranged to be held in first limiting section 11 and described first
Between filler ring 31.In addition, the generation type of the first passage can also be other modes, the application does not make specific herein
It limits.
Likewise, the second channel is not limited to that the inner wall in the outer wall and the support ring 35 of the outer tube 1 is arranged
Between.For example, can be arranged in the tube wall of the outer tube 1 etc..Certainly, the generation type of the second channel can also be it
His mode, the application do not make specific limit herein.
In a specific embodiment, the support ring 35 may include main pipe and looped pipeline body, the main pipe
On be provided with annular groove, the looped pipeline body is arranged in the annular groove, correspondingly, the opening includes setting described
Main opening on main pipe, and be arranged on the looped pipeline body, and the pair being connected with the main opening, cavity is open；Institute
The both ends of the surface for stating looped pipeline body are formed with limiting slot between the inner wall of the annular groove of the main pipe, for being arranged to described close
The first locating part 36 and the second locating part 37 that sealing 2 limits.
In the present embodiment, the support ring 35 may include main pipe and the looped pipeline body of nested setting.It is wherein described
Inside annular groove is provided on the outer wall of main pipe.The looped pipeline body is arranged in the annular groove.Specifically, described
The length of annular groove axial direction is longer than the length of the looped pipeline body, in the ring of the both ends of the surface of the looped pipeline body to the main pipe
It is formed with limiting slot between the inner wall of connected in star.The limiting slot is for being arranged the first locating part limited to the sealing element 2
36 and second locating part 37.Wherein, first locating part 36 or second locating part, 37 entirety can be torus, in institute
It states and is formed with protrusion on the inner wall of torus.The protrusion is fastened in the limiting slot that the looped pipeline body is formed with main pipe, and
At least two faces of first locating part, 36 or second locating part 37 can be in contact with the sealing element 2, in order to described
The both ends of sealing element 2 carry out axial and circumferential limit.For example, first locating part, 36 or second locating part 37 is away from described convex
The face and the inner surface of the sealing element 2 risen match, limit function is better achieved.Certainly, first locating part 36
Or second the concrete form of locating part 37 can also be other forms, the application does not make specific limit herein.
When the support ring 35 may include main pipe and the looped pipeline body of nested setting, correspondingly, the opening includes
Main opening on the main pipe is set, and setting is connected on the looped pipeline body, and with the main opening, cavity
Pair opening, the main opening can be connected with the secondary opening.
The support ring 35 includes main pipe and looped pipeline body, correspondingly, the opening includes being arranged on the main pipe
Main opening, and the secondary opening that is arranged on the looped pipeline body, and can be connected with the main opening, cavity；The supervisor
The inner wall of body, the outer tube 1 outer wall at least one the first diversion trench being circumferentially arranged at intervals with for flow-through fluid,
By first return guide trough at the alternate path when main pipe coordinates with the outer tube 1.
In the present embodiment, it can be arranged at intervals on the inner wall of the main pipe and be led for the first of flow-through fluid
Chute.It, can be by first return guide trough at the alternate path when main pipe coordinates with the outer tube 1.
Alternatively, the first diversion trench for flow-through fluid can be arranged at intervals in outer wall in the outer tube 1.It is described
It, can be by first return guide trough at the alternate path when main pipe coordinates with the outer tube 1.
Alternatively, being all arranged at intervals with for flow-through fluid on the inner wall of the main pipe and on the outer wall of the outer tube 1
The first diversion trench.The main pipe be set in the outer tube 1 it is outer when, the two formed the first diversion trench can be opposite, formed
The alternate path.
Further, when the number of first diversion trench be it is multiple, along the circumferentially-spaced arrangement of the main pipe, phase
It answers, the main opening, the number of secondary opening and the number of first diversion trench match；The packer has the master
Second state of the first state and the main opening and the secondary open communication that opening is staggered with the secondary opening.
In the present embodiment, when the number of first diversion trench is multiple, advantageously ensure that packer quickly may be used
Self sealss are realized by ground.Wherein, first diversion trench is connected with the main opening on the main pipe.When first water conservancy diversion
Slot be circumferentially arranged for interval when, the main opening and first diversion trench match and can also circumferentially be spaced cloth
It sets.The number of the main opening can match with the number of first diversion trench.In addition, the number of the secondary opening also may be used
Think it is multiple, specifically, the number of the secondary opening can be less than or equal to the number of first diversion trench or the main opening.
Preferably, the number of the secondary opening can be identical as the number of the main opening, in favor of pressure fluid it is fast and reliable pass through
Multiple channels are injected into cavity, are set to realize.
In the present embodiment, the packer have first state that the main opening is staggered with the secondary opening and
Second state of the main opening and the secondary open communication.When under the concentric sand-flushing pipe column lower going-into-well, the main opening
The first state being staggered is may be at the secondary opening, it is described when to ensure that the concentric sand-flushing pipe column is under lower going-into-well
Packer will not be realized and accidentally be sealed.After the concentric sand-flushing pipe column tripping in is to designated position, the concentric sand washing can be rotated
Pipe predetermined angular so that the main opening and the secondary opening in communication, and then in well-flushing, the packer is realized from close
Envelope.
In one embodiment, in first retainer ring 31, first washer, 33 matched interface extremely
Few one is formed with the second diversion trench, first retainer ring 31 and first washer 33 by second return guide trough at
First access.
In the present embodiment, it could be formed with the second diversion trench in the upper surface of first retainer ring 31, described
The number of two diversion trenches can match with first diversion trench.For example, the number of second diversion trench can with it is described
The number of first diversion trench is identical.The multiple second diversion trench along first retainer ring 31 circumferentially-spaced arrangement.Institute
It states when the first retainer ring 31 coordinates with first washer 33 and forms first access.
Alternatively, could be formed with the second diversion trench, of second diversion trench in the lower surface of first washer 33
Number can match with first diversion trench.For example, the number of second diversion trench can be with first diversion trench
Number is identical.The multiple second diversion trench along first washer 33 circumferentially-spaced arrangement.First retainer ring 31
First access is formed when coordinating with first washer 33.
It is led alternatively, being all formed with second in the lower surface of the upper surface of first retainer ring 31 and first washer 33
Chute.First retainer ring 31 forms first access when coordinating with first washer 33.
In one embodiment, the sealing element 2 is provided with reinforcing rib in the first end and the second end position
4。
In the present embodiment, the sealing element 2 can be provided with reinforcement in the first end and the second end position
Muscle 4, to improve the rigidity of the first end and the second end, to improve the bearing capacity of the sealing element 2.
Above-mentioned each embodiment in this specification is described in a progressive manner, identical between each embodiment
Similar portion is cross-referenced, and what each embodiment stressed is and other embodiment difference.
The foregoing is merely several embodiments of the invention, although disclosed herein embodiment it is as above, institute
Content is stated only to facilitate the embodiment for understanding the present invention and using, is not intended to limit the present invention.Any institute of the present invention
Belong to those skilled in the art, do not depart from disclosed herein spirit and scope under the premise of, can be in embodiment
Formal and details on make any modification and variation, but the scope of patent protection of the present invention still must be with appended claims
Subject to the range that book is defined.
Claims (11)
1. a kind of sand washing effective packer with one heart, which is characterized in that the sand washing concentric tube is provided with outer tube, the outer tube it is outer
The first limiting section, the second limiting section are axially provided on wall；
The packer is set on the outer tube, and between first limiting section and the second limiting section, the packing
Device includes：The supporting mechanism that can be abutted against at least one of first limiting section or the second limiting section and by the branch
The sealing element of support mechanism limit；
The sealing element is hollow annular shape, and the sealing element has the first end that can be limited by the supporting mechanism and the
Two ends, and the hollow cavity between the first end and the second end；Wherein, the internal diameter of the cavity is more than institute
State the internal diameter of first end, the second end；
It is logical that the sealing element matches the fluid for being formed with and the cavity capable of being made to be in communication with the outside with the supporting mechanism, outer tube
Road.
2. sand washing as described in claim 1 effective packer with one heart, which is characterized in that the supporting mechanism includes：
For with matched first retainer ring of the first end of the sealing element；
For with matched second retainer ring of the second end of the sealing element；
It is set in that the outer tube is outer and the support ring between first retainer ring and the second retainer ring.
3. sand washing as claimed in claim 2 effective packer with one heart, which is characterized in that further include：
The first washer being arranged between first limiting section and first retainer ring；
And the second packing ring being arranged between second limiting section and second retainer ring.
4. sand washing as claimed in claim 3 effective packer with one heart, which is characterized in that be provided on the side wall of the support ring
The opening being connected to the cavity of the sealing element,
When the packer setting, the path that fluid enters the cavity of the sealing element by the fluid channel includes phase successively
Connection：The outer wall of the first access, the outer tube between first washer and first retainer ring and the support ring
Inner wall between alternate path and opening.
5. sand washing as claimed in claim 4 effective packer with one heart, which is characterized in that the support ring includes main pipe and pair
Tube body is provided with annular groove on the main pipe, and the looped pipeline body is arranged in the annular groove, correspondingly, described open
Mouthful include the main opening that is arranged on the main pipe, and be arranged on the looped pipeline body, and with the main opening, cavity phase
The secondary opening of connection；
It is formed with limiting slot between the inner wall of annular groove of the both ends of the surface of the looped pipeline body to the main pipe, for setting pair
The first locating part and the second locating part of the sealing element limit.
6. sand washing as claimed in claim 5 effective packer with one heart, which is characterized in that first locating part or described second
Locating part generally torus, is formed with protrusion on the inner wall of the torus, the protrusion be fastened on the looped pipeline body with
In the limiting slot that main pipe is formed, and at least two faces of first locating part or the second locating part can be with the sealing element phase
Contact.
7. sand washing as claimed in claim 4 effective packer with one heart, which is characterized in that the support ring includes main pipe and pair
Tube body correspondingly, the opening includes the main opening being arranged on the main pipe, and is arranged on the looped pipeline body, and
The secondary opening that can be connected with the main opening, cavity；
The inner wall of the main pipe, the outer tube outer wall at least one be circumferentially arranged at intervals with for flow-through fluid
First diversion trench, by first return guide trough at the alternate path when main pipe coordinates with the outer tube.
8. sand washing as claimed in claim 7 effective packer with one heart, which is characterized in that the number of first diversion trench is more
It is a, along the circumferentially-spaced arrangement of the main pipe, correspondingly, the main opening, the number of secondary opening and first water conservancy diversion
The number of slot matches；
The packer has the main opening and the secondary first state being staggered and the main opening and the pair of being open
Second state of open communication.
9. sand washing as claimed in claim 4 effective packer with one heart, which is characterized in that first retainer ring, described first
At least one of matched interface of washer is formed with the second diversion trench, and first retainer ring is logical with first washer
Second return guide trough is crossed into first access.
10. sand washing as described in claim 1 effective packer with one heart, which is characterized in that the sealing element is in the first end
Portion and the second end position are provided with reinforcing rib.
11. sand washing as described in claim 1 effective packer with one heart, which is characterized in that
The outer tube includes the main leg connected by way of being detachably connected and looped pipeline section, wherein is set on the main leg
It is equipped with first limiting section, second limiting section is provided in the looped pipeline 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 CN106285551A (en) | 2017-01-04 |
| CN106285551B true CN106285551B (en) | 2018-08-14 |
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| 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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| CN (1) | CN106285551B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106681383B (en) * | 2017-01-23 | 2023-07-28 | 中国科学院理化技术研究所 | A 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 |
| 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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| CN1594826A (en) * | 2003-09-09 | 2005-03-16 | 赵连臣 | Stratum anti-pollution air bag packer |
| CN2893131Y (en) * | 2005-12-23 | 2007-04-25 | 中国石油化工股份有限公司河南油田分公司第二采油厂 | Sand flushing packer |
| CN200940456Y (en) * | 2006-08-28 | 2007-08-29 | 中国石油化工股份有限公司江苏油田分公司石油工程技术研究院 | Spiral flow sand washing device for horizontal well |
| CN104481432A (en) * | 2014-11-24 | 2015-04-01 | 中国石油天然气股份有限公司 | Sand washing pipe column and sand washing method of low-pressure leakage well |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7051812B2 (en) * | 2003-02-19 | 2006-05-30 | Schlumberger Technology Corp. | Fracturing tool having tubing isolation system and method |
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|---|---|---|---|---|
| CN1594826A (en) * | 2003-09-09 | 2005-03-16 | 赵连臣 | Stratum anti-pollution air bag packer |
| CN2893131Y (en) * | 2005-12-23 | 2007-04-25 | 中国石油化工股份有限公司河南油田分公司第二采油厂 | Sand flushing packer |
| CN200940456Y (en) * | 2006-08-28 | 2007-08-29 | 中国石油化工股份有限公司江苏油田分公司石油工程技术研究院 | Spiral flow sand washing device for horizontal well |
| CN104481432A (en) * | 2014-11-24 | 2015-04-01 | 中国石油天然气股份有限公司 | Sand washing pipe column and sand washing method of low-pressure leakage well |
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| CN106285551A (en) | 2017-01-04 |
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