CN206071527U - Packing element, packer and bridging plug including tinsel sealing ring - Google Patents
Packing element, packer and bridging plug including tinsel sealing ring Download PDFInfo
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- CN206071527U CN206071527U CN201620915881.4U CN201620915881U CN206071527U CN 206071527 U CN206071527 U CN 206071527U CN 201620915881 U CN201620915881 U CN 201620915881U CN 206071527 U CN206071527 U CN 206071527U
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Abstract
The application is related to field of sealing technology, the packing element including tinsel sealing ring, packer and the bridging plug that can bear High Temperature High Pressure used in more particularly to a kind of oil exploitation industry.Packing element includes tinsel sealing ring and cellosilk sealing ring, and tinsel sealing ring is inconsistent with cellosilk sealing ring and is arranged below；The colloid that tinsel sealing ring includes cross one another many one metal wires and each tinsel bonds together；The colloid that cellosilk sealing ring includes the plurality of fibers silk of cross one another high temperature high voltage resistant and each cellosilk bonds together.When the tinsel sealing ring of the application is arranged on the lower section of cellosilk sealing ring, tinsel sealing ring is because reducing the axial compressive force for passing to cellosilk sealing ring with the friction of central canal and/or sleeve pipe, now can effectively reduce the axial compressive force that cellosilk sealing ring is subject to, and shoulder Producing reason is that axial compressive force is excessive, so this design can reduce or prevent the generation of shoulder.
Description
Technical field
The application is related to field of sealing technology, can bear High Temperature High Pressure used in more particularly to a kind of oil exploitation industry
Packing element, packer and bridging plug including tinsel sealing ring.
Background technology
Packer is a kind of key tool that oil field well recovers the oil, and is widely used in oil field dispensing, separate zone stimulation, layering and adopts
The several work such as oil, mechanical pipe water blockoff, packer need the packing for carrying out annular space, to realize that oil gas is layered, and realize annular space
The core component of packing is packing element.Bridging plug is also a kind of instrument of the oil gas layering commonly used in oil extraction operation.Packer and
The main distinction of bridging plug is, packer be usually pressure break, be acidified, look for the measure construction such as Lou when it is temporary transient stay in well, and bridge
Plug is temporarily or permanently stayed in well in measures such as sealing oil recoveries.Packer and central canal stay well simultaneously, mix that give up can
Individually to stay well, and bridging plug is then individually to stay well.Structurally, packer is hollow structure, can flow freely oil gas water,
And in bridging plug, it is then solid construction.
Used as the instrument of Oil-gas Separation, packer and bridging plug are required for packing element, critical component of the packing element as sealing, its matter
Amount directly affects the sealing effectiveness and service life of packer and bridging plug, and conclusive effect is played in packer and bridging plug.
Packing element is typically made using rubber type of material, therefore referred to as packing element.But packing element is only the technology art that agreement becomes social custom in a kind of industry
Language, for representing the functional parts for playing sealing function, and refers not only to packing element and can only be made by rubber.When packing element bears one
When fixed pressure is to promote its deformation for sealing, need to consider the deformability of packing element itself, if deformation deficiency can cause which
Sealing function cannot be played；If deformation is excessive, packing element may be caused to fail because of conquassation, lose recovery capability.Most of all,
When packing element down-hole be subject to high-temperature steam act on when, packing element be more by while High Temperature High Pressure act on and fail cause lose
Go recovery capability.
9th phase in 2002《Petroleum machinery》Disclose《Packer compresses packing element " protrusion-dispelling " new construction》, wherein recording
Following content：" so-called protrusion-dispelling, exactly lays certain blocker ring, support member, limits device and guard member etc. in packing element end, uses
When preventing and limit packer setting, packing element is projected towards oil sets annular space or is flowed "." as anti-lug structure is for covering
Annular gap between packer and sleeve pipe, during packer setting, once packing element deformation is contacted with casing wall, under load effect outside,
The outburst prevention device just unfolded annular space covered between packer and casing wall, prevents packing element prominent towards in this annular space, forces the packing element to be in
Respectively to uniform compression, the contact stress for producing and keeping packing element higher, so as to obtain good sealing "." ... mainly have
Copper bowl curing type and two kinds of steel mesh or steel band curing type.The former is that the thick copper bowls of two 2mm are solidificated in two end packing elements respectively
On certain end face, the latter is that the steel mesh or steel band of thick 1mm or so are solidificated on two end packing element end faces respectively ".
2013 first-phase《Oil field equipment》Disclose《Packer rubber barrel structure is improved and benefit analysiss》Text
Chapter, wherein recording herein below：" on conventional packer, string has 3 packing elements, is divided into the packing element physical dimension of upper, middle and lower 3
Identical and upper lower rubber cylinder is long packing element type, middle packing element is 2 kinds of versions of short rubber cylinder.Sent out by the research to traditional three packing elements structure
Existing, play main seal effect is upper packing element ".Also, non-linear point is carried out by non linear finite element analysis software Abaqus
Analysis draws：" as axial load increases, axial compression amount also increases, and during beginning, decrement increase is more apparent, and subsequent decrement increases
Slow down greatly, packing element deformation tends towards stability；With the increase of setting force, packing element is gradually increased with casing-contact length.Packing element appearance
Cylinder partial limited radial deformation system, packing element inner surface deform the outward bulge as appearance, and when load increases, packing element is crushed
And be compacted finally.But as structure is limited, only going up packing element can be compacted.When operating pressure is 30MPa, upper packing element base
There is slight shoulder in this completely densified, packing element upper end, but packing element does not occur isolate phenomenon, and shoulder is within allowed band ".
The first phase in 2009《Oil field equipment》In《The improvement of high-pressure packer cartridge》In think " due to rubber
Glue top layer is easily torn, therefore considers to add layer of metal piece (such as copper sheet) on the top layer of rubber ".
But, above-mentioned prior art only analyzes the first axial compressive force of applying (equivalent to " axial load ") to packing element deformation
Impact.But in actual production process, need to apply top-down first axial compressive force first to make glue to packing element
Cylinder produces preliminary sealing, and then packing element is applied the second axial compressive force that can be subject to from bottom to top (material such as downhole gas is to packing element
Impact).According to the test of inventor, when the first axial compressive force is 30MPa, inventor has found that almost all of packing element all can
There is shoulder, when further applying a second axial pressure (such as 15MPa or 20MPa), all of packing element can be at shoulder
Generation is isolated, and causes seal failure.
Further, inventor also has found, though the sealing that packing element can be of short duration when pressure is applied a second axial, but well
When the materials such as spirit body are impacted to packing element, the small molecule of the high temperature and high pressure steam being contained therein can be to the packing element of macromolecular material
Degradation is produced, causes packing element to follow the string in bottom first and sealing function cannot be played, affect the length of packing element sealing
Effect property.
Utility model content
One purpose of the application is to provide a kind of packing element of new structure design, prevents or reduce packing element generation
Shoulder.
According to the one side of the application, there is provided a kind of packing element including tinsel sealing ring, with positioned at the logical of center
It is hole, the inner surface positioned at the through hole outer surface corresponding with the inner surface, upper positioned at the packing element two ends respectively
End and bottom and the pars intermedia between the upper end and the bottom, the upper end are used to bear along axle
To first axial compressive force in direction, the bottom is used to bear contrary with first axial compressive force along the axial direction
The second axial compressive force；When first axial compressive force puts on the upper end, the upper end, pars intermedia and bottom
Deform upon in radial direction；When second axial compressive force puts on the bottom, the upper end, pars intermedia and
Bottom is deformed upon in the radial direction, and the packing element is included in the more than one metal of the axial direction arrangement
Silk sealing ring and more than one cellosilk sealing ring, one of those described tinsel sealing ring and fibre one of those described
Dimension silk sealing ring is inconsistent and is arranged on the lower section of the cellosilk sealing ring；
The tinsel sealing ring includes cross one another many one metal wires and each tinsel bonds together
Colloid；
The cellosilk sealing ring includes the plurality of fibers silk of cross one another high temperature high voltage resistant and by each fiber
The colloid that silk bonds together.
Preferably, the first inconsistent spacer ring is provided with below one of those described tinsel sealing ring, with the gold
Be provided with the second inconsistent spacer ring above the category inconsistent cellosilk sealing ring of silk sealing ring, described first every
The hardness of ring and second spacer ring is all higher than the hardness of the tinsel sealing ring and the cellosilk sealing ring；
Also, spacer ring is not provided between the tinsel sealing ring and its inconsistent cellosilk sealing ring.
Preferably, first spacer ring and second spacer ring are metal material.
Preferably, first spacer ring and second spacer ring are aluminium material；
The thickness of first spacer ring is D1, and the thickness of second spacer ring is D2, and 4mm≤D1≤6mm, 4mm≤
D2≤6mm。
Preferably, the thickness of first spacer ring is 5mm.
Preferably, the thickness of second spacer ring is 5mm.
Preferably, first spacer ring and second spacer ring are iron material matter；
The thickness of first spacer ring is D1, and the thickness of second spacer ring is D2, and 2mm≤D1≤4mm, 2mm≤
D2≤4mm。
Preferably, the thickness of first spacer ring and second spacer ring is 3mm.
According to further aspect of the application, there is provided a kind of packer, the packer has one of above-mentioned technical proposal institute
The packing element of restriction.
According to the application another in terms of, there is provided there is one of above-mentioned technical proposal to be limited for a kind of bridging plug, the bridging plug
Packing element.
The technical scheme that the application is provided at least has the following technical effect that：
1st, the technical scheme according to the application, the hardness of upper end are so subject in upper end more than the hardness of pars intermedia
During the first axial compressive force, upper end is more not for itself by the first axial pressure transmission to pars intermedia and bottom
Radial deformation.When using less first axial compressive force, pars intermedia and bottom so can be allowed to occur radially to become
Shape, the sealing overall so as to reach packing element.
2nd, the technical scheme according to the application, in the case where the hardness of pars intermedia is constant, the application is by the hard of upper end
Degree is set greater than the hardness of pars intermedia, and so when the first axial compressive force by formed objects is acted on, upper end is radially
The deformation in direction is less, it is accordingly required in particular to it is noted that correspondingly upper end because the shoulder that radial deformation is formed it is also less.It is less
Shoulder can be effectively prevented packing element and isolate, having reached prevents the effect of packing element seal failure.
3rd, in one embodiment, as plurality of fibers silk, the sealing ring when filametntary quantity is more are included in matrix
Partially hard, when filametntary negligible amounts, sealing ring is partially soft, thus can adjust sealing ring according to filametntary quantity
Soft or hard degree, so can be by the hardness of the change sealing ring hardness overall directly to change packing element, and reaching increases packing element
The purpose of comprcssive strength scope.Also, when packing element is subject to the first axial compressive force and expands, cellosilk will limit the expansion, from
And increase the structural rigidity of packing element on the whole, increase the comprcssive strength of packing element.
4th, multiple sealing rings that the application is related to axially are arranged, if there is indivedual sealing rings to damage during oil exploitation,
The sealing ring of damage can be replaced by new sealing ring, and remaining sealing ring is no longer changed.So on the whole for, increase
Single sealing ring average use duration, can greatly reduce the usage amount of packing element, reduce production cost.
5th, when it is packing that the matrix of the application is selected, the packing of existing high temperature high voltage resistant can be selected, so, works as glue
Body and graphite packing or carbon fiber plate root be combined into for sealing ring when, packing can integrally be played a supporting role, and colloid can rise
To the effect that deformation and sealing are strengthened.The application selects existing packing, and without making the special packing as matrix, energy
Enough motilities for increasing production.According to the inventors knowledge, existing graphite packing and carbon fiber packing can tolerate High Temperature High Pressure
Effect, but the resilience of graphite packing and carbon fiber packing is poor.In this application, colloidal dispersions are among packing,
The packing that colloid contributes to being compressed after the disappearance of one axial compressive force carries out resilience, so as to be conducive to packing element to take out from down-hole.
6th, when the tinsel sealing ring of the application is arranged on the lower section of cellosilk sealing ring, tinsel sealing ring because with center
The friction of pipe and/or sleeve pipe can reduce the axial compressive force for passing to cellosilk sealing ring, now can effectively reduce cellosilk
The axial compressive force that sealing ring is subject to, and shoulder Producing reason is that axial compressive force is excessive, so this design can reduce
Or prevent the generation of shoulder.
Description of the drawings
Describe some specific embodiments of the application hereinafter with reference to the accompanying drawings by way of example, and not by way of limitation in detail.
In accompanying drawing, identical reference denotes same or similar part or part.In accompanying drawing：
Fig. 1 is the compression packer comprising packing element and central canal and the position relationship of sleeve pipe of the application one embodiment
Schematic diagram；
Fig. 2 is the packing element and central canal and the position relationship schematic diagram of sleeve pipe of the application one embodiment, wherein only illustrating
A part of packing element, central canal and sleeve pipe；
Fig. 3 shows shoulder that the packing element shown in Fig. 2 produced after being applied in the first axial compressive force and central canal and sleeve pipe
Position relationship schematic diagram, does not now also apply a second axial pressure to packing element；
Fig. 4 is the structural representation of the packing element of the application one embodiment；
Fig. 5 is the structural representation of the sealing ring of the application one embodiment；
Fig. 6 is the cross-sectional view of the sealing ring of the application one embodiment；
Fig. 7 is the cross-sectional view of the application one embodiment sealing ring；
Fig. 8 is the cross-sectional view of the sealing ring of the application one embodiment；
Fig. 9 is the cross-sectional view of the sealing ring of the application one embodiment；
Figure 10 is the cross-sectional view of the sealing ring of the application one embodiment；
Figure 11 is the cross-sectional view of the packing element of the not shown through hole of the application one embodiment；
Figure 12 is the structural representation of the packing element of the three-stage according to the application one embodiment.
Reference in figure is as follows：
10- packing elements, 101- outer surfaces, 102- inner surfacies, 103- through holes, 104- upper ends, 105- pars intermedias, 106- lower ends
Portion, 107- shoulders；
108- matrixes, 109- colloids, the first copper sheets of 111-, copper sheet on the inside of 111a-, copper sheet on the outside of 111b-, 111c- openings,
Copper sheet on the upside of 111d-, copper sheet on the downside of 111e-, the second copper sheets of 112-, the 3rd copper sheets of 113-；
30- central canals；
40- sleeve pipes；
The first spacer rings of 51-, the second spacer rings of 52-, the 3rd spacer rings of 53-, the 4th spacer rings of 54-；
70- sealing rings, 71- tinsel sealing rings, 72- cellosilk sealing rings, 73- graphite-seal rings；
200- compression packers；
The first axial directions of A-；
The second axial directions of B-；
F1- the first axial compressive force；
F2- the second axial compressive force.
Specific embodiment
Direction hereinafter described " on ", D score be using Fig. 2 as reference narration.
Compression packer 200 as shown in Figure 1 has the packing element 10 of the application.During compression packer 200 is connected to
It is placed on heart pipe 30 in sleeve pipe 40.Compression packer 200 needs in the wellbore different oil reservoirs, water layer to be separated and held
By certain pressure reduction, it is desirable to can descend pit shaft precalculated position, packing is tight, can have durability in down-hole again, can be smooth when needing
Rise.
As shown in Fig. 2 packing element 10 is located in the annular space that sleeve pipe 40 and central canal 30 are constituted, rigid spacer ring 50 is in axial direction
First axial compressive force F of (i.e. the first axial direction A) from top to bottom is provided on direction1, can also remove in other embodiments
Rigid spacer ring 50 by the first axial compressive force F can be applied to packing element 101Other parts replacing.As shown in Fig. 2 10 liang of packing element
Hold as upper end 104 and bottom 106, pars intermedia 105 is located between upper end 104 and bottom 106.Upper end 104 is used for
Bear the first axial compressive force F in axial direction1, bottom 106 be used for bear in axial direction with the first axial compressive force F1Phase
The second anti-axial compressive force F2.Used as a part for packing element 10, upper end 104, bottom 106 and pars intermedia 105 should have
It is flexible.As a kind of explanation to elasticity and the restriction of elastic size, when the first axial compressive force F1Put on upper end 104
When, upper end 104, pars intermedia 105 and bottom 106 are deformed upon in radial direction；When the second axial compressive force F2Put on
During bottom 106, upper end 104, pars intermedia 105 and bottom 106 are deformed upon in radial direction.Implementing shown in Fig. 2
In example, upper end 104 and bottom 106 are respectively provided with hypotenuse, can also be not provided with the hypotenuse in other embodiments.
As shown in figure 3, inventor has found, when upper end 104 is subject to the first axial compressive force F1When, upper end 104 can produce
Very big shoulder 107, when applying a second axial pressure F again2When, isolate at the shoulder 107 that upper end 104 can in figure 3.
Reduce or prevent the structure design of shoulder 107 below to describe the application.
In the embodiment shown in fig. 4, the generally tubular of packing element 10, packing element 10 have the through hole 103 positioned at center, the through hole
103 are limited and formed by inner surfacies 102, and outer surface 101 is positioned at the outside of the through hole 103 corresponding with inner surface 102.When
One axial compressive force F1Upper end 104 or the second axial compressive force F are acted on along the first axial direction A2Act on along the second axial direction B
When bottom 106,10 entirety of packing element will be axially compressed and be radially expanded and (have with " deforming upon in radial direction "
Have identical implication), promote 101 outwardly convex of outer surface and inner surface 102 is inwardly protruding, but be usually outer in sequential
101 first partly outwardly convex of surface.Applying the first axial compressive force F1Afterwards, the central canal in inner surface 102 and Fig. 1 and Fig. 2
30 sealings, outer surface 101 are sealed with the sleeve pipe 40 in Fig. 1 and Fig. 2.Usually, the space between inner surface 102 and central canal 30
Less (almost bonded to each other), and the gap between outer surface 101 and sleeve pipe 40 is larger, as central canal 30 and sleeve pipe 40 are distinguished
The raised size of the maximum of inner surface 102 and outer surface 101 is defined, so causing 101 outwardly convex of outer surface
Degree is more than 102 inwardly protruded degree of inner surface.
A kind of design for reducing shoulder 107：
As described above, upper end 104, bottom 106 and pars intermedia 105 should have elasticity, but in Fig. 2 and Fig. 4 institutes
In showing embodiment, the hardness of upper end 104 is more than the hardness of pars intermedia 105.So the first axial compressive force F is born in upper end 1041
When, pars intermedia 105 is more than deformation of the upper end 104 in radial direction in the deformation of radial direction.
As the hardness of upper end 104 is more than the hardness of pars intermedia 105, so axially pressed by first in upper end 104
Power F1When, upper end 104 is more by first axial compressive force F1Pars intermedia 105 and bottom 106 are passed to not for certainly
The radial deformation of body.So can be using less first axial compressive force F1When can allow pars intermedia 105 and bottom 106
Raw radial deformation, so as to reach the sealing of 10 entirety of packing element.Inventor in experiments it is found that, if the hardness of upper end 104 is little
In the hardness of pars intermedia 105, then upper end 104 is by the first axial compressive force F1When, it is more to become for the radial direction of itself
Shape rather than pars intermedia 105 and bottom 106 are passed to, prevent or reduce shoulder 107 as shown in Figure 3.
According to the technical scheme of the application, in the case where the hardness of pars intermedia 105 is constant, the application is by upper end 104
Hardness be set greater than the hardness of pars intermedia 105, so in the first axial compressive force F by formed objects1During effect, upper end
Portion 104 is less in the deformation of radial direction, it is accordingly required in particular to it is noted that correspondingly upper end 104 is formed because of radial deformation
Shoulder 107 is also less.Less shoulder 107 can be effectively prevented packing element 10 and isolate, and having reached prevents 10 seal failure of packing element
Effect.
Due to the radial direction deformation of upper end 104 it is less, it is likely that ground, now upper end 104 radial direction deformation
Sleeve pipe 40 and central canal 30 are sealed by Jing deficiencies, that is to say, that now sealing function will no longer be played in upper end 104, and be only
By the first axial compressive force F being subject to1Pars intermedia 105 and bottom 106 are passed to, this is the packing element 10 and prior art of the application
Packing element a critically important difference.And, even if the radial direction deformation of upper end 104 it is larger and by sleeve pipe 40 and center
Pipe 30 is sealed, and the now sealing of upper end 104 is also only a supplement to the packing element 10 sealing, and no matter whether upper end 104
Play sealing function, setting of 104 hardness of upper end more than 105 hardness of pars intermedia, it is therefore prevented that shoulder 107 it is excessive and caused
Packing element 10 is isolated, also can be with less first axial compressive force F1Packing element 10 is sealed.
According to the technical scheme of the application, in the case where the hardness of pars intermedia 105 is constant, the application is by upper end 104
Hardness be set greater than the hardness of pars intermedia 105, but so upper end 104 in the first axial compressive force F1May be simultaneously under effect
Do not contact with sleeve pipe 40 and do not play sealing function.Under this kind of special construction, when bottom 106 it is hard with pars intermedia 105
When spending essentially identical, the sealing of the packing element of the application is provided by bottom 106 and pars intermedia 105；When bottom 106 and upper end
When the hardness in portion 104 is essentially identical, the sealing of the packing element of the application is provided by pars intermedia 105.Such packing element 10 of the application
It is entirely different in the structure for sealing with the packing element of prior art.
As a preferred embodiment, when the outer wall of upper end 104 and the inconsistent inwall of sleeve pipe 40, be more preferably on
During the inner wall sealing of the outer wall and sleeve pipe 40 of end 104, now it is covered in pars intermedia the basic homalographic in the bottom of upper end 104
105 top, upper end 104 are substantially not present difference in the radial direction with pars intermedia 105, so as to pars intermedia 105 with
What the generation of 104 junction of upper end was downward compresses effect, prevents or reduces pars intermedia 105 and occur with 104 junction of upper end
Shoulder.
If " being more by first axial compressive force F as above to reach1Pass to pars intermedia 105 and lower end
Radial deformation of the portion 106 not for itself " and upper end 104 do not produce the effect of shoulder 107, it is possible to use on-deformable
Metal derby, such as iron block.If the diameter of metal derby is less, bigger shoulder can be produced with the pars intermedia 105 of metal block contact
107, if metal derby is relatively large in diameter, in view of the bending situation of sleeve pipe 40, metal derby is difficult to slide into conjunction in sleeve pipe 40
Suitable position, is especially considering that coasting distance may be up to 1 kilometer, when 40 inwall of sleeve pipe has raised debris.If sleeve pipe
Enter the then larger metal derby of foreign body to be not easy to detach from sleeve pipe in 40.On the other hand, lifting force is less then can not be by
Metal derby is detached from sleeve pipe 40, and lifting force is larger may then to damage sleeve pipe 40.Consider, upper end used in this application
104 have elasticity, but need to be defined the elasticity of upper end 104, i.e., the hardness of upper end 104 is more than pars intermedia 105
Hardness, the diameter that such upper end 104 can be done are less, and convenient in set in-pipe, such as upper end 104 can be with pars intermedia
105 diameter is identical.As upper end 104 is harder, the shoulder 107 that its own is difficult to form shoulder 107 or be formed is less, by
When in compression upper end 104 radial direction gradually extensional and deform upon, reduce upper end 104 and sleeve pipe 40 it
Between space, so as to reduce or prevent the size of the formation and formation of the shoulder of pars intermedia 105.
In one embodiment, hardness of the hardness of bottom 106 more than pars intermedia 105, so that bottom 106 bears the
Two axial compressive forces F2When, pars intermedia 105 is more than deformation of the bottom 106 in radial direction in the deformation of radial direction.Based on same
The principle of sample, such structure are prevented from bottom 106 and are bearing the first axial compressive force F1Or second axial compressive force F2When produce
Raw shoulder, and can prevent bottom 106 from further bearing the second axial compressive force F in the case where shoulder has been produced2
Shi Zaocheng shoulders become big, cause 10 seal failure of packing element so as to prevent bottom 106 from being isolated.
In another embodiment, upper end 104 is essentially identical with the hardness of bottom 106, that is to say, that upper end
No matter 104 hardness that pars intermedia 105 is all higher than with the hardness of bottom 106, be so subject to the first axial compressive force F1Or second
Axial compressive force F2When, the deformation of pars intermedia 105 is all higher than upper end 104 and bottom 106.Such structure can make pars intermedia
105 quickly reach sealing state, and prevent upper end 104 there is shoulder with bottom 106 or prevent upper end 104 with
The shoulder that bottom 106 has produced becomes big.
As shown in Figure 2, Figure 3 and Figure 4 in embodiment, packing element 10 is by upper end 104, bottom 106 and pars intermedia 105 3
It is grouped into.By taking Fig. 4 as an example, in the first axial direction A, that is, on top-down direction, three sealing rings 70 fill respectively
When upper end 104, bottom 106 and pars intermedia 105, but it is more serving as pars intermedia 105 by least two sealing rings 70.
Another kind of design for reducing shoulder 107：
Background section mention " so-called protrusion-dispelling, exactly packing element end lay certain blocker ring, support member, limit dress
Put with guard member etc., during for preventing and limit packer setting, packing element is projected towards oil sets annular space or is flowed ".
Background section mention " ... mainly have copper bowl curing type and steel mesh or two kinds of steel band curing type.The former be by
Two thick copper bowls of 2mm are solidificated on two end packing element end faces respectively, and the latter is by the steel mesh or steel band of thick 1mm or so point
It is not solidificated on two end packing element end faces ".
Above two existing design follows same thinking：Directly the happening part in shoulder is limited using attaching means
System, directly to prevent the generation of shoulder.So the hardness of attaching means is the problem for needing to consider：In packing element if attaching means is really up to the mark
During deformation (especially producing shoulder), it is likely that attaching means can produce incised wound to packing element, cannot if attaching means is excessively soft
Play a part of to prevent shoulder.So the requirement to attaching means is very strict, for example for above-mentioned prior art copper bowl and
Speech, needs the thickness of strict control copper bowl.
" according to the test of inventor, when the first axial compressive force is 30MPa, inventor has found several as stated in the Background Art
Can all there is shoulder in all of packing element, when further applying a second axial pressure (such as 15MPa or 20MPa), all of
Packing element can be produced at shoulder and be isolated, and cause seal failure ".Inventor thinks be changed from the structure of packing element itself
Enter, develop and a kind of can either seal and not allow to be also easy to produce the packing element structure of shoulder.But contradiction is, if desired packing element is realized
Then packing element can not be too hard for sealing function, and then packing element can not be too soft if desired to prevent shoulder.If packing element is a hardness homogeneous body,
Need to select the material that can play of suitable stiffness, according to prior art from the point of view of, also do not develop tolerance at present and in the range of the world
The new material that 20MPa high pressure and 350 DEG C of high temperature are acted on simultaneously.
The application employs different thinkings：The packing element 10 of the application is by multiple sealing rings in axial direction arrangement first
70 compositions, so each sealing ring 70 just can be different with hardness because of the selection of material, the packing element 10 that harder sealing ring 70 is arranged
Two ends can play the problem for preventing shoulder from producing, softer sealing ring 70 can then play the effect of sealing.Further, glue
Cylinder 10 is included in the more than one tinsel sealing ring 71 and more than one cellosilk sealing ring 72 of axial direction arrangement, its
In a tinsel sealing ring 71 it is inconsistent with one of cellosilk sealing ring 72 and be arranged on the cellosilk sealing ring
72 lower section.Wherein, tinsel sealing ring 71 includes cross one another many one metal wires and each tinsel bonds together
Colloid.Wherein, cellosilk sealing ring 72 includes the plurality of fibers silk of cross one another high temperature high voltage resistant and by each cellosilk
The colloid for bonding together.Through test of many times, inventor has found that existing cellosilk can occur in the presence of 22Mpa pulling force
Fracture, therefore the cellosilk sealing ring 72 that cellosilk is made also is easy to fracture under the effect of 22Mpa axial compressive forces.Therefore
Inventor selects to have used tinsel sealing ring 71.But the adhesive of tinsel and colloid is less than the adhesion of cellosilk and colloid
Property, if the part for sealing is all using tinsel sealing ring 71, in tinsel sealing ring 71 under high pressure effect
Colloid is likely to come off, and causes packing element 10 seal, so the application is by tinsel sealing ring 71 and cellosilk sealing ring 72
Pairing is used.The reason for tinsel sealing ring 71 is arranged on the lower section of cellosilk sealing ring 72 is that inventor has found shoulder
Produce and the rupture of shoulder is more occur the second axial compressive force F from bottom to top to be applied in packing element 102When, work as metal
Silk sealing ring 71 is when being arranged on the lower section of cellosilk sealing ring 72, tinsel sealing ring 71 because with central canal 30 and/or sleeve pipe 40
Friction can reduce the axial compressive force for passing to cellosilk sealing ring 72, now can effectively reduce cellosilk sealing ring 72 and receive
The axial compressive force for arriving, and shoulder Producing reason is that axial compressive force is excessive, so this design can reduce or prevent shoulder
Prominent generation.Tinsel sealing ring 71 is made up of tinsel and colloid in addition, by the first axial compressive force F1When, in which
Wall and outer wall are substantially contacted with central canal 30 and sleeve pipe 40 respectively, the annular for so constituting in central canal 30 and sleeve pipe 40
In space, tinsel sealing ring 71 to put on cellosilk sealing ring 72 with annular space cross section identical area substantially,
Along with tinsel sealing ring 71 compares the characteristic of the anti-shoulder structurally flexible of simple metal, tinsel sealing ring 71 will not be to cellosilk
Sealing ring 72 is produced and is isolated.Especially, as shown in figure 11, when the two ends of packing element 10 are respectively graphite-seal ring 73, due to stone
Black sealing ring 73 is relatively hard, is also arranged with copper sheet, graphite-seal ring in another preferred embodiment outside graphite-seal ring 73
73 can't isolate tinsel, thus will not also isolate tinsel sealing ring 71.In the embodiment shown in fig. 11, realize above-mentioned
The combination of two kinds of anti-shoulder designs, effect are obvious.
A tinsel sealing ring 71 and a cellosilk sealing ring 72 are schematically illustrated in Figure 11 only, in other realities
More tinsel sealing rings 71 can also be set in applying example, being matched with tinsel sealing ring 71 for equal number is similarly set
The cellosilk sealing ring 72 of conjunction.
Come specifically to describe the shape and structure of sealing ring 70 below.
In process of the test inventor find, due to the soft or hard of packing element 10 it is variant, for example, by polyether-ether-ketone make glue
Cylinder 10 is harder, makes packing element 10 reach the first axial compressive force F for setting needs1It is larger to press in the first axial direction of nominal amount in other words
Power F1Lower rubber cylinder 10 becomes weakened configuration, causes packing element 10 play sealing function.When packing element 10 is made using softer colloid,
The packing element 10 understands the first axial compressive force F because sustaining nominal amount again1And allow to sustain by conquassation or i.e.
One axial compressive force F1But it is being subsequently subjected to the second axial compressive force F2When packing element can also be by conquassation.
Inventor solve packing element 10 it is softer during, once adulterated in colloid multiple high temperature high voltage resistants being separated from each other
Cellosilk, such as graphite packing silk, glass fiber.Such structure can solve the problem that packing element 10 is overall partially to a certain extent
Soft problem.But, inventor is further discovered that, although the cellosilk of doping each be connected with colloid, but each cellosilk
Between be not connected to substantially or connect less, so the hardness of packing element 10 limitedly can only be increased very much.So, inventor devises
Following technical scheme：As shown in figure 5, a matrix 108 is constituted using cross one another plurality of fibers silk, and make colloid 109
It is distributed on the surface of matrix 108 and each cellosilk of bonding is forming sealing ring 70, the sealing ring 70 of this spline structure is with footpath
To the ductility in direction, in other words, enable sealing ring 70 straight within the specific limits due to the mutual tied up in knots of each cellosilk
Footpath change does not occur to rupture (mainly filametntary fracture), during 70 diameter of sealing ring becomes big, cross one another
Cellosilk will be offset a part and promote its diameter to become the first big axial compressive force F1, so as to the diameter to cause sealing ring 70 increases
Greatly to a certain extent, it is desirable to provide the first bigger axial compressive force F1.Especially, colloid 109 by the cellosilk of each intersection tightly
Link together, to cause sealing ring 70 diameter increase to a certain extent, it is necessary to the first bigger axial compressive force F1。
For conclusion, each cellosilk intersects to form a resistance, and each cellosilk bonding is formed a resistance by colloid 109 again,
In the presence of the two resistances, 10 overall more difficult compression of packing element, this is hardened equivalent to 10 entirety of packing element.When sealing ring 70
When filametntary quantity in certain volume is roughly the same, inventor has found to adjust phase by the thickness of change sealing ring
The filametntary quantity mutually intersected, and then the first axial compressive force F needed for adjusting1Size be applied to setting for packing element 10
The size of power.Likewise it is possible to be intersected to adjust by the filametntary quantity in the certain volume for increasing sealing ring 70
Filametntary quantity, and then the first axial compressive force F needed for also adjusting1Size.The upper end that above two mode makes
Sealing ring 70 hardness more than middle sealing ring 70 hardness.
Fig. 5 is returned to, for the clear needs in structure, Fig. 5 illustrate only the colloid for being coated on 108 all surface of matrix
109, and the not shown colloid 109 penetrated into inside matrix 108.Illustrate as to surface herein, such as when matrix 108
When cross section is circular, the colloid 109 in Fig. 5 is located on the periphery of matrix 108.In Fig. 5, matrix 108 is by many high temperature resistant height
The cellosilk of pressure is polymerized, and such as cellosilk can be the material of other high temperature high voltage resistants such as glass fibre or carbon fiber.
In one embodiment, each cellosilk longitude and latitude is woven together and forms matrix 108, each fiber in other are embodiment
Silk can also otherwise be woven together and form matrix 108.
In Fig. 5, the thickness of matrix 108 is 1.8cm-2.5cm, and quantity can be selected as 2-12.In embodiment illustrated in fig. 11
In there are 6 sealing rings 70, the quantity of matrix 108 is also 6.Filametntary diameter is selected as 7-30 μm, thus can be one
On individual sealing ring 70, the cellosilk with substantial amounts, can greatly improve the hardness of packing element 10.According to the test of inventor, base
The thickness of body 108 is being advisable less than 2cm.This is because, inventor has found, needs for the glue for forming colloid 109 to penetrate into base
Sealing ring 70 is formed in body 108, but as the permeating speed of the increase glue of 108 thickness of matrix will be gradually slack-off.Especially
The speed that glue penetrates into after the thickness of matrix 108 is more than 2.5cm will be very slow.So, in one embodiment, each matrix
108 thickness is 2cm, can also be 1.8cm or 2.5cm in other embodiments.
By narration above, in the technical scheme of the application, not necessarily need the cellosilk that there is elasticity,
This be due to packing element 10 contraction and expansion by colloid 109 completing.Mentioned above, colloid 109 is distributed in the table of each matrix 108
It is on face and internal and by each cellosilk bonding.It is desired that colloid every cellosilk of 109 bonding, and each cellosilk is handed over
Bond together fork.
The copper sheet coated on packing element 10 is described in detail below.
Inventor has found, after shoulder 107 is solved the problems, such as, can play close if packing element 10 is from suitable material
Envelope is acted on, but through very short time (such as six hours) packing element 10 or meeting seal failure in the environment of High Temperature High Pressure, it is right
The packing element 10 of failure is researched and analysed, it is found that packing element is failed because of the rupture of shoulder 107, and be because packing element
Fester and fail in 10 bottom 106.Through studying, little point of the high temperature and high pressure steam being contained within downhole gas that festers
Son can produce what degraded was caused to the packing element of macromolecular material.After packing element 10 is sealed, the only lower surface and well of bottom 106
Spirit body directly contact, so as to cause packing element 10 to degrade from the bottom up failure.
In the embodiment shown in fig. 6, sealing ring 70 is coated with the first copper sheet 111,111 cladding sealing ring of the first copper sheet
70 lower surface (lower portion), medial surface (left-hand component), lateral surface (right-hand component).As can be seen that the first copper sheet 111 has
There is opening 111c, the 111c that is open is located at the upper surface of sealing ring 70, and the upper surface along sealing ring 70 extends.Implement at one
In example, referring to Fig. 5, opening 111c can also be shrunk to a perforate along the upper surface of sealing ring 70.Opening 111c or perforate
Design, be in order in the case of High Temperature High Pressure, to flow out for the gas of remaining in sealing ring 70, in the sealing ring that top is arranged
The gas of High Temperature High Pressure can also be prevented when the perforate is compressed to flow into from the perforate.In the embodiment shown in fig. 6, being open 111c will
Second copper sheet 112 is covered, and also can use the second copper sheet 112 to cover opening 111c in other embodiments.
It has to be considered that sealing ring 70 is annular, so the first copper sheet 111 being coated on outside which is also annular,
First copper sheet 111 of annular easily produces rupture in bending place, so in the embodiment shown in fig. 7, the first copper sheet 111 is coated
The upper surface of sealing ring 70, lower surface and lateral surface and the not medial surface (left-hand component) of cladding sealing ring 70.So, first
Copper sheet 111 only needs to once to bend i.e. formable, improves the production efficiency of the first copper sheet 111.It is previously mentioned " inner surface 102
(almost bonded to each other) less with the space between central canal 30, and the gap between outer surface 101 and sleeve pipe 40 is larger ", institute
With sealing ring 70 only need very little it is inwardly protruding by seal with central canal 30, and need the very big outwardly convex just can be with set
Pipe 40 is sealed, and the face for thus not coating copper sheet does not select to select in medial surface in lateral surface.
Referring to Fig. 7, the edge of opening of the first copper sheet 111 is concordant with the medial surface of sealing ring 70 in the figure 7, and this design is
In the case where medial surface does not coat copper sheet, protection is produced to the upper and lower surface of sealing ring 70 as much as possible, reduces high temperature high
Pressure Degradation of the steam to sealing ring 70.
In the embodiment shown in fig. 8, sealing ring 70 is coated with the 3rd copper sheet 113,113 cladding sealing ring 70 of the 3rd copper sheet
Lower surface, medial surface, lateral surface and upper surface, or the upper surface of 113 cladding sealing ring 70 of the 3rd copper sheet, lower surface with
And lateral surface and the not medial surface of cladding sealing ring 70.When the first copper sheet 111 is also coated on the upper of the graphite-seal ring 73 of lower end
During surface, the shape of the first copper sheet is identical with the 3rd copper sheet 113.
In the embodiment shown in fig. 9, sealing ring 70 is coated with inner side copper sheet 111a and outside copper sheet 111b, inner side copper sheet
A part of lower surface of 111a cladding sealing rings 70, whole medial surface (left-hand component) and a part of upper surface.Outside copper sheet
A part of lower surface of 111b cladding sealing rings 70, whole lateral surface (right-hand component) and a part of upper surface.And it is interior
Side copper sheet 111a and outside copper sheet 111b have the part of the superposition that overlaps in upper and lower surface.
In the embodiment shown in fig. 10, sealing ring 70 is coated with upside copper sheet 111d and downside copper sheet 111e, upside copper
A part of medial surface of skin 111d cladding sealing rings 70, whole upper surfaces (upper rim portion) and a part of lateral surface.Downside copper
A part of medial surface of skin 111e cladding sealing rings 70, whole lower surfaces (lower portion) and a part of lateral surface.And on
Side copper sheet 111d and downside copper sheet 111e have the part of the superposition that overlaps in medial surface and lateral surface.In one embodiment
In, upside copper sheet 111d and downside copper sheet 111e prevents the small molecule of high temperature and high pressure steam and sealing ring 70 in overlapping welding
Directly contact.
Fig. 9 and embodiment illustrated in fig. 10 prevent the first copper sheet also for the quantity of the bending place for reducing by the first copper sheet 111
111 easily produce rupture in bending place, and also improve the production efficiency of the first copper sheet 111.
Referring to Figure 11, when two graphite-seal rings 73 of lower end are coated with Fig. 6, Fig. 8 or Fig. 9 copper sheet, height is prevented from
The small molecule of warm high steam is caused to corrode and is degraded to the graphite-seal ring 73 of lower end.Further, due to the graphite of lower end
Sealing ring 73 is only contradicted with central canal 30 and sleeve pipe 40, only plays slight sealing function, graphite-seal ring 73 and the set of lower end
Gap is likely that there are between pipe 40, so being also required to copper sheet be covered on the lateral surface of the graphite-seal ring 73 of lower end.Due to
The upper surface of the graphite-seal ring 73 of lower end is compressed by the lower surface of tinsel sealing ring 71, has been completely cut off and high temperature and high pressure steam
The directly contact of small molecule, from from the aspects of this, the upper surface of the graphite-seal ring 73 of lower end simultaneously need not cover copper sheet.If
Thus, be then necessarily located on the lateral surface of graphite-seal ring 73 of lower end at the opening of copper sheet, so in packing element 10 by compression
During radial deformation, the opening of copper sheet can be produced to tinsel sealing ring 71 and be isolated, thus in the embodiment shown in fig. 6,
Opening 111c is located on upper surface, in order to further completely cut off the directly contact with the small molecule of high temperature and high pressure steam, opening
Second copper sheet 112 is covered by 111c.Inner side copper sheet 111a and outside copper sheet 111b in Fig. 9 is " u "-shaped structure, when mounted
First inner side copper sheet 111a can be set on sealing ring 70 from medial surface, outside copper sheet 111b is set in into sealing from lateral surface
On ring 70 and sections inner side copper sheet 111a, such structure can be conveniently mounted to copper sheet on sealing ring 70, improve peace
Dress efficiency.For two graphite-seal rings 73 of upper end, its structure after combining with copper sheet can be Fig. 6, Fig. 8 or Fig. 9
Shown structure.When the structure shown in Fig. 6, need to rotate 180 degree to make by the first copper sheet 111 and the second copper sheet 112
With the 111c that is now open is pressed against by the upper surface of cellosilk sealing ring 72, and such structure is prevented from opening 111c and opens.
By being used separately as the narration in top and bottom to structure shown in Fig. 6, it is known that opening 111c all should be by adjacent close
Seal ring is pressed against, and prevents opening 111c when by the first axial compressive force F1 or the second axial compressive force F2 from opening.Knot in Fig. 8
Structure, welds to realize at gap after can coat sealing ring 70 again.Structure in Fig. 9, why will
The lap of inner side copper sheet 111a and outside copper sheet 111b is arranged at 70 upper and lower surface of sealing ring, and reason is, when
The lap of inner side copper sheet 111a and outside copper sheet 111b is when being arranged at the medial surface or lateral surface of sealing ring 70, when to first
In axial compressive force F1 or the second axial compressive force F2 compression process, may adjacent sealing ring be caused to isolate, and overlapping portion
Set up the upper and lower surface for being placed in sealing ring 70 separately, adjacent sealing ring can to overlapping portion extrusion, further completely cut off with
The directly contact of the small molecule of high temperature and high pressure steam.The overlapping welding of inner side copper sheet 111a and outside copper sheet 111b in Fig. 9
The structure shown in Fig. 8 can be formed afterwards.And can prevent from bearing the second axial compressive force by the setting to copper sheet thickness
F2When shoulder rupture.In one embodiment, the thickness of copper sheet is 1mm.
Need especially, it is emphasized that 70 outer cladding copper sheet of sealing ring, to realize sealing ring 70 with central canal 30 and sleeve pipe
40 sealing, i.e. metal and the sealing of metal, then need very big pressure.In embodiments herein, including not coating
The tinsel sealing ring 71 and cellosilk sealing ring 72 of copper sheet.The graphite-seal ring 73 of bottom prevents most High Temperature High Pressure
Steam, the graphite-seal ring 73 of secondary lower end further prevent a part of high temperature and high pressure steam, so reach tinsel sealing ring 71
It is just considerably less with the high temperature and high pressure steam of cellosilk sealing ring 72, it is effectively reduced high temperature and high pressure steam and tinsel is sealed
The corrosion and degraded of ring 71 and cellosilk sealing ring 72, extends the sealing persistent period of packing element 10.
When as shown in figure 12, when packing element 10 is three-stage, each section of packing element can be a single packing element, so
Packing element 10 shown in Figure 12 is equivalent to be spliced by three separate packing elements in the axial direction.Figure 12 is only with packing element
10 be three-stage as an example, in other embodiments packing element can also have other sections, such as two sections or five sections.
In the embodiment shown in fig. 11, the lower section of tinsel sealing ring 71 is provided with the first inconsistent spacer ring 51, fiber
The top of silk sealing ring 72 is provided with the second inconsistent spacer ring 52, the first spacer ring 51, the second spacer ring 52, the 3rd spacer ring 53 and the
The hardness of four spacer rings 54 is all higher than the hardness of tinsel sealing ring 71 and cellosilk sealing ring 72.Also, tinsel sealing ring 71
Spacer ring is not provided between cellosilk sealing ring 72.3rd spacer ring 53 is arranged between two graphite-seal rings 73 of upper end, the
Four spacer rings 54 are arranged between two graphite-seal rings 73 of lower end.
The spacer ring (the first spacer ring 51, the second spacer ring 52, the 3rd spacer ring 53 and the 4th spacer ring 54) of the application and prior art
Spacer ring role be different：Spacer ring is that reason its harder characteristic is set directly at packing element 10 in the prior art
Two ends are preventing the generation of shoulder.And in this application, as packing element 10 is by multiple sealing rings (tinsel sealing ring 71, fibre
73) dimension silk sealing ring 72 and graphite-seal ring constitute, due to the hardness of each sealing ring it is different, so in axial compressive force
Lower each sealing ring deformation in the axial direction of effect is different, such as in axle due to due to cellosilk sealing ring 72 is softer
To pressure effect under be partially embedded in adjacent graphite-seal ring 73, this can cause packing element cannot seal or sealing effectiveness not
It is good.So in this application, the design of spacer ring is to provide for a uniform plane of constraint, and thus those skilled in the art can
Know, two stress surfaces up and down of spacer ring in this application all should be as far as possible for plane, and for rigidity.First spacer ring 51,
The upper and lower surfaces that the rigidity spacer ring such as the second spacer ring 52, the 3rd spacer ring 53 and the 4th spacer ring 54 equably can be contacted to which apply
Pressure, prevent tinsel sealing ring 71, cellosilk sealing ring 72 and graphite-seal ring 73 by axial compressive force and in upper table
Face or lower surface become uneven.
Spacer ring is not provided between tinsel sealing ring 71 and cellosilk sealing ring 72, its reason is, when being under pressure,
Tinsel sealing ring 71 can be combined as a whole with cellosilk sealing ring 72, integrally play sealing function.If arranging spacer ring, in pressure
Under power effect, spacer ring can be surrounded by tinsel sealing ring 71 with cellosilk sealing ring 72, then just can carry out expansion in radial direction and come
Sealing, this will necessarily reduce sealing property.First spacer ring 51, the second spacer ring 52, the 3rd spacer ring 53 and the 4th spacer ring 54 are metal
Material, such as aluminium material or iron material matter.When for aluminium material when, the thickness of first spacer ring (51) is D1, second spacer ring
(52) thickness is D2, and 4mm≤D1≤6mm, 4mm≤D2≤6mm.Preferably, D1 and/or D2 is 5mm.Due to iron material matter
It is harder, thus when for iron material matter when, 2mm≤D1≤4mm, 2mm≤D2≤4mm, it is preferable that D1 and/or D2 be 3mm.
In the embodiment shown in fig. 11, the first axial compressive force F is not affected by packing element 101When, each sealing ring 70 is and packing element
10 radial direction is parallel.As shown in figure 1, packing element 10 is by the first axial compressive force F1When, in axial direction shortening in footpath
Expand to direction, then the graphite-seal ring 73 again in bottom bears the second axial compressive force F everywhere2。
In one embodiment of the application, matrix 108 is graphite packing or carbon fiber packing.Packing (packing), leads to
Often formed by relatively soft thread braiding, usual sectional area is square or rectangular, circle.In one embodiment, base
The cross section of body 108 is tetragon, for example square.In other embodiments, the cross section of matrix 108 can also be circle.
The application also provides a kind of packer, and the packer has the packing element 10 limited by one of above-mentioned technical proposal.
The application also provides a kind of bridging plug, and the bridging plug has the packing element 10 limited by one of above-mentioned technical proposal.
So far, although those skilled in the art will appreciate that detailed herein illustrate and describe the multiple of the application and show
Example property embodiment, but, in the case of without departing from the application spirit and scope, still can be direct according to present disclosure
It is determined that or deriving many other variations or modifications for meeting the application principle.Therefore, scope of the present application is understood that and recognizes
It is set to and covers all these other variations or modifications.
Claims (10)
1. a kind of packing element (10) including tinsel sealing ring, with the through hole (103) positioned at center, positioned at the through hole
(103) inner surface (102) at place, the outer surface (101) corresponding with the inner surface (102), respectively be located at the packing element
(10) upper end (104) and bottom (106) at two ends and be located at the upper end (104) and the bottom (106) it
Between pars intermedia (105), the upper end (104) is for bearing the first axial compressive force in axial direction, the bottom
(106) for bearing second axial compressive force contrary with first axial compressive force along the axial direction；When described first
When axial compressive force puts on the upper end (104), the upper end (104), pars intermedia (105) and bottom (106) exist
Radial direction is deformed upon；When second axial compressive force puts on the bottom (106), the upper end (104), in
Between portion (105) and bottom (106) deform upon in the radial direction, it is characterised in that
The packing element (10) be included in the more than one tinsel sealing ring (71) of axial direction arrangement and more than one
Cellosilk sealing ring (72), one of those described tinsel sealing ring (71) and cellosilk sealing ring one of those described
(72) lower section that is inconsistent and being arranged on the cellosilk sealing ring (72)；
The tinsel sealing ring (71) bonds together including cross one another many one metal wires and by each tinsel
Colloid；
The plurality of fibers silk of the cellosilk sealing ring (72) including cross one another high temperature high voltage resistant and by each fiber
The colloid that silk bonds together.
2. packing element (10) according to claim 1, it is characterised in that
Inconsistent the first spacer ring (51) is provided with below one of those described tinsel sealing ring (71), with the tinsel
Inconsistent the second spacer ring (52), institute are provided with above an inconsistent cellosilk sealing ring (72) of sealing ring (71)
The hardness for stating the first spacer ring (51) and second spacer ring (52) is all higher than the tinsel sealing ring (71) and the cellosilk
The hardness of sealing ring (72)；
Also, be not provided between the tinsel sealing ring (71) and its inconsistent cellosilk sealing ring (72) every
Ring.
3. packing element (10) according to claim 2, it is characterised in that
First spacer ring (51) and second spacer ring (52) are metal material.
4. packing element (10) according to claim 3, it is characterised in that
First spacer ring (51) and second spacer ring (52) are aluminium material；
The thickness of first spacer ring (51) is D1, and the thickness of second spacer ring (52) is D2, and 4mm≤D1≤6mm,
4mm≤D2≤6mm。
5. packing element (10) according to claim 4, it is characterised in that
The thickness of first spacer ring (51) is 5mm.
6. packing element (10) according to claim 4, it is characterised in that
The thickness of second spacer ring (52) is 5mm.
7. packing element (10) according to claim 3, it is characterised in that
First spacer ring (51) and second spacer ring (52) are iron material matter；
The thickness of first spacer ring (51) is D1, and the thickness of second spacer ring (52) is D2, and 2mm≤D1≤4mm,
2mm≤D2≤4mm。
8. packing element (10) according to claim 7, it is characterised in that
The thickness of first spacer ring (51) and second spacer ring (52) is 3mm.
9. a kind of packer, it is characterised in that including the packing element (10) described in one of claim 1-8.
10. a kind of bridging plug, it is characterised in that including the packing element (10) described in one of claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620915881.4U CN206071527U (en) | 2016-08-22 | 2016-08-22 | Packing element, packer and bridging plug including tinsel sealing ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620915881.4U CN206071527U (en) | 2016-08-22 | 2016-08-22 | Packing element, packer and bridging plug including tinsel sealing ring |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089146A (en) * | 2016-08-22 | 2016-11-09 | 天鼎联创密封技术（北京）有限公司 | Packing element, packer and bridging plug including tinsel sealing ring |
| WO2018036224A1 (en) * | 2016-08-22 | 2018-03-01 | 天鼎联创密封技术（北京）有限公司 | Rubber cylinder with hard sealing rings on both ends, packer and bridge plug |
-
2016
- 2016-08-22 CN CN201620915881.4U patent/CN206071527U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089146A (en) * | 2016-08-22 | 2016-11-09 | 天鼎联创密封技术（北京）有限公司 | Packing element, packer and bridging plug including tinsel sealing ring |
| WO2018036224A1 (en) * | 2016-08-22 | 2018-03-01 | 天鼎联创密封技术（北京）有限公司 | Rubber cylinder with hard sealing rings on both ends, packer and bridge plug |
| CN106089146B (en) * | 2016-08-22 | 2019-06-18 | 天鼎联创密封技术（北京）有限公司 | Packing element, packer and bridge plug including wire sealing ring |
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