CN205714081U - Lower end sealing ring is coated with the packing element of opening copper sheet, packer and bridging plug - Google Patents
Lower end sealing ring is coated with the packing element of opening copper sheet, packer and bridging plug Download PDFInfo
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- CN205714081U CN205714081U CN201620606236.4U CN201620606236U CN205714081U CN 205714081 U CN205714081 U CN 205714081U CN 201620606236 U CN201620606236 U CN 201620606236U CN 205714081 U CN205714081 U CN 205714081U
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- packing element
- copper sheet
- end sealing
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Abstract
The application relates to field of sealing technology, and the lower end sealing ring that can bear High Temperature High Pressure particularly relating to use in a kind of oil exploitation industry is coated with the packing element of opening copper sheet, packer and bridging plug.The lower end sealing ring of packing element is coated with the first copper sheet, upper surface, lower surface, medial surface and the lateral surface of the first copper sheet cladding lower end sealing ring；The thickness of the first copper sheet is set to, when the first axial compressive force is born in upper end, lower end sealing ring deforms upon in radial direction and makes the first copper sheet being distributed on the inner surface of lower end sealing ring can conflict with central canal, and the first copper sheet being distributed on the outer surface of lower end sealing ring can be conflicted with sleeve pipe；The edge of the first copper sheet forms ring-type opening at the upper surface of lower end sealing ring.The lower end sealing ring of the application is coated with the first copper sheet, the Degradation reducing or preventing the little molecule of high temperature and high pressure steam to packing element, and improve that packing element seals is long-lasting.
Description
Technical field
The application relates to field of sealing technology, particularly relate in a kind of oil exploitation industry use can bear High Temperature High Pressure
Lower end sealing ring is coated with the packing element of opening copper sheet, packer and bridging plug.
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 are adopted
The several work such as oil, mechanical pipe water blockoff, packer needs to carry out the packing of annular space, to realize oil gas layering, and realizes annular space
The core component of packing is packing element.Bridging plug is also the instrument of a kind of 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 construction of the measure such as leakage time temporary transient stay in well, and bridge
Plug is temporarily or permanently to stay in well when measures such as sealing oil recoveries.Packer and central canal stay well simultaneously, mix that give up can
Individually to stay well, bridging plug is then individually to stay well.Structurally, packer is hollow structure, can flow freely oil gas water,
It bridging plug is then solid construction.
Being required for packing element as the instrument of Oil-gas Separation, packer and bridging plug, packing element is as the critical component sealed, its matter
Amount directly affects packer and the sealing effectiveness of bridging plug and service life, plays conclusive effect in packer and bridging plug.
Packing element typically uses rubber type of material to make, 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 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 promotes its deformation for sealing, need to consider the deformability of packing element itself, if deformation deficiency can cause it
Sealing function cannot be played；If deformation is excessive, packing element may be caused to lose efficacy because of conquassation, lose recovery capability.The most important thing is,
When packing element in down-hole by high-temperature steam effect time, packing element be more affected by High Temperature High Pressure while effect and lost efficacy cause lose
Go recovery capability.
" petroleum machinery " of the 9th phase in 2002 discloses " packer compression packing element " protrusion-dispelling " new construction ", wherein records
Following content: " so-called protrusion-dispelling, it is simply that lay certain blocker ring, support member, restriction device and guard member etc. in packing element end, uses
Packing element prominent or flowing towards oil sets annular space when tissue and restriction packer setting "." owing to anti-lug structure is used to cover
Annular gap between packer and sleeve pipe, during packer setting, once packing element deformation contacts with casing wall, under load effect outside,
Outburst prevention device with regard to the unfolded annular space covered between packer and casing wall, stop packing element towards prominent in this annular space, force packing element in
Each to uniform compression, produce and keep the contact stress that packing element is higher, thus obtain good sealing "." ... mainly have
Copper bowl curing type and steel mesh or steel band curing type two kinds.The former is that the copper bowl that two 2mm are thick is solidificated in two end packing elements respectively
On certain end face, the latter is steel mesh or the steel band of thick about 1mm to be solidificated in respectively on two end packing element end face ".
2013 first-phase " oil field equipment " discloses the literary composition of " packer rubber barrel structure improves and benefit analysis "
Chapter, wherein records herein below: " on conventional packer, string has 3 packing elements, is divided into 3, upper, middle and lower packing element physical dimension
Identical and upper lower rubber cylinder be long packing element type, middle packing element be 2 kinds of versions of short rubber cylinder.By the research of traditional three packing element structures is sent out
Existing, play main seal effect is upper packing element ".Further, non-linear point is carried out by non linear finite element analysis software Abaqus
Analysis draws: " along with axial load increases, axial compression amount also increases, and during beginning, decrement increases more apparent, and decrement increases subsequently
Slowing down greatly, packing element deformation tends towards stability；Along 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 deformation outward bulge as appearance, when load increases, packing element is crushed
And in last compacting.But owing to structure limits, only going up packing element can be compacted.When operating pressure is 30MPa, upper packing element base
This completely densified, there is slight shoulder, but does not occurs packing element to isolate phenomenon in packing element upper end, and shoulder is within allowed band ".
" improvement of high-pressure packer cartridge " in the first phase in 2009 " oil field equipment " is thought " due to rubber
Glue top layer is easily torn, and therefore considers to add layer of metal sheet (such as copper sheet) on the top layer of rubber ".
Above-mentioned prior art only analyzes the shadow applying the first axial compressive force (being equivalent to " axial load ") to packing element deformation
Ring.But in actual production process, need first packing element to apply top-down first axial compressive force to make packing element produce
Raw sealing；Packing element applies second axial compressive force from bottom to top the most again, and (packing element is rushed by the material such as downhole gas
Hit).According to the test of inventor, when the first axial compressive force is 30MPa, inventor finds that almost all of packing element all can occur
Shoulder, when further applying a second axial pressure (such as 15Ma), all of packing element all can produce at shoulder and isolate, and causes
Seal failure.
Further, inventor also finds, even if packing element can seal, but when packing element is impacted by the materials such as downhole gas,
The little molecule of the high temperature and high pressure steam being contained therein can produce Degradation to the packing element of macromolecular material, causes packing element first
Follow the string in bottom and sealing function cannot be played, affect the long-lasting of packing element sealing.
Utility model content
One purpose of the application is the packing element providing a kind of new structure to design, and prevents packing element seal failure.
An aspect according to the application, it is provided that a kind of packing element, has and is positioned at the through hole at center, is positioned at described through hole
Outer surface, the upper and lower end laying respectively at described packing element two ends and the position that inner surface is corresponding with described inner surface
Pars intermedia between described upper end and described bottom, described upper end is for bearing first axially pressing in axial direction
Power, described bottom is for bearing second axial compressive force contrary with described first axial compressive force along described axial direction；When
When described first axial compressive force puts on described upper end, described upper end, pars intermedia and bottom all occur in radial direction
Deformation；When described second axial compressive force puts on described bottom, described upper end, pars intermedia and bottom are all in described footpath
Deform upon to direction, described packing element by one be positioned at the upper end sealing ring of upper end, one be positioned at the lower end sealing ring of lower end, one
The individual above intermediate seal ring between described upper end sealing ring and described lower end sealing ring arranges at described axial direction
Forming, described upper end sealing ring serves as described upper end, and described lower end sealing ring serves as described bottom, described intermediate seal ring
Serve as described pars intermedia；
Wherein, described lower end sealing ring is coated with the first copper sheet, and described first copper sheet is coated with described lower end sealing ring
Upper surface, lower surface, medial surface and lateral surface；The thickness of described first copper sheet is set to, when described upper end is born described
During the first axial compressive force, described lower end sealing ring deforms upon in described radial direction and makes to be distributed in described lower end sealing ring
The first copper sheet on described inner surface can be conflicted with central canal, and is distributed on the described outer surface of described lower end sealing ring
First copper sheet can be conflicted with sleeve pipe；
The edge of described first copper sheet forms ring-type opening at the upper surface of described lower end sealing ring.
Preferably, the second copper sheet arranged at the described upper surface of described lower end sealing ring covers described opening or institute
State opening to be covered by described second copper sheet.
Preferably, described upper end sealing ring is coated with the 3rd copper sheet, and described 3rd copper sheet is coated with described upper end sealing ring
Lower surface, medial surface, lateral surface and upper surface；The thickness of described 3rd copper sheet is set to, when institute is born in described bottom
When stating the second axial compressive force, described 3rd copper sheet being coated in the shoulder formed by the described upper surface of described upper end sealing ring
Do not rupture.
Preferably, the quantity of described intermediate seal ring is three, and wherein the described intermediate seal ring of bottom is with topmost
Described intermediate seal ring be all coated with copper sheet, middle described intermediate seal ring is not coated with copper sheet.
Preferably, the hardness of described upper end sealing ring is more than the hardness of described intermediate seal ring, so that described upper end seals
When ring bears described first axial compressive force, described intermediate seal ring is more than described upper end sealing ring in footpath in the deformation of radial direction
To the deformation in direction；
The hardness of described lower end sealing ring is more than the hardness of described intermediate seal ring, so that described lower end sealing ring bears institute
When stating the second axial compressive force, described intermediate seal ring is more than described lower end sealing ring in radial direction in the deformation of radial direction
Deformation.
Preferably, described upper end sealing ring is essentially identical with the hardness of described lower end sealing ring, so that described upper end seals
When ring bears described first axial compressive force, described intermediate seal ring is more than described upper end sealing ring and institute in the deformation of radial direction
State the deformation in radial direction of the lower end sealing ring, and when described lower end sealing ring bears described second axial compressive force, described in
Between sealing ring in the deformation of radial direction more than described upper end sealing ring and described lower end sealing ring in the deformation of radial direction.
Preferably, described intermediate seal ring has colloid and in circular matrix, and described matrix is by cross one another resistance to
The plurality of fibers silk composition of High Temperature High Pressure, the bonding each described cellosilk of described colloid, and described colloid are distributed in each described base
So that the inside and outside of multiple described sealing ring arranged along described axial direction forms described interior table respectively on the surface of body
Face and outer surface.
Preferably, described matrix is graphite packing or carbon fiber packing or glass fibre packing.
According to further aspect of the application, it is provided that a kind of packer, this packer has one of technique scheme institute
The packing element limited.
Another aspect according to the application, it is provided that a kind of bridging plug, this bridging plug has one of technique scheme and limited
Packing element.
The technical scheme that the application provides at least has the following technical effect that
1, according to the technical scheme of the application, the hardness of upper end, more than the hardness of pars intermedia, is so subject in upper end
During the first axial compressive force, upper end is that this first axial compressive force is passed to pars intermedia and bottom not for self more
Radial deformation.So pars intermedia and bottom can be allowed to occur radially when using the first less axial compressive force become
Shape, thus reach the sealing that packing element is overall.
2, according to the technical scheme of the application, in the case of the hardness of pars intermedia is constant, hard by upper end of the application
Degree is set greater than the hardness of pars intermedia, and so when by the first axial compressive force effect of formed objects, upper end is radially
The deformation in direction is less, it is accordingly required in particular to it is noted that the shoulder that correspondingly upper end is formed because of radial deformation is the least.Less
Shoulder can be effectively prevented packing element and isolate, reached to prevent the effect of packing element seal failure.
3, in one embodiment, owing to matrix comprising plurality of fibers silk, the sealing ring when filametntary quantity is more
Partially hard, when filametntary negligible amounts, sealing ring is the softest, thus can regulate sealing ring according to filametntary quantity
Soft or hard degree, so can directly change, by the hardness changing sealing ring, the hardness that packing element is overall, reaches to increase packing element
The purpose of comprcssive strength scope.
4, the matrix of the application has cross one another cellosilk, and colloid is by bonding for each cellosilk.When packing element is by first
Axial compressive force and when expanding, cellosilk will limit this expansion, thus increases the structural rigidity of packing element on the whole, increases packing element
Comprcssive strength.
5, multiple sealing rings that the application relates to axially arrange, if there being indivedual sealing ring 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.For the most on the whole, increase
The use duration that single sealing ring is average, it is possible to be greatly reduced the usage amount of packing element, reduces production cost.
6, when the matrix of the application is chosen as packing, the packing of existing high temperature high voltage resistant can be selected, so, work as glue
When body is combined into as sealing ring with graphite packing or carbon fiber plate root, packing entirety can be played a supporting role, and colloid can rise
The effect strengthened to deformation and sealing.The application selects existing packing, and need not make the special packing as matrix, energy
Enough motilities 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 is among packing,
The packing that after one axial compressive force disappearance, colloid contributes to being compressed carries out resilience, thus beneficially packing element takes out from down-hole.
7, the matrix of the application all becomes angle with the radial direction of packing element, so at packing element by the first axial compressive force effect
Time, first sealing ring becomes parallel with the radial direction of packing element, and then sealing ring just carries out inwardly or outwardly projection radially.And
In the state that sealing ring is become parallel with radial direction from heeling condition, sealing ring self can't produce the change of radial direction
Shape, simply packing element can produce the deformation of radial direction.So, as a whole, add the deflection of the radial direction of packing element,
Packing element can be overcome harder and the defect of radial direction deformation deficiency.
8, the lower end sealing ring of the application is coated with the first copper sheet, reduces or prevent the little molecule pair of high temperature and high pressure steam
The Degradation of packing element, improves the long-lasting of packing element sealing.
Accompanying drawing explanation
Describe some specific embodiments of the application the most by way of example, and not by way of limitation in detail.
Reference identical in accompanying drawing denotes same or similar parts 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 one embodiment of the application
Schematic diagram；
Fig. 2 is packing element and central canal and the position relationship schematic diagram of sleeve pipe of one embodiment of the application, the most only illustrates
A part of packing element, central canal and sleeve pipe；
Fig. 3 shows that the packing element shown in Fig. 2 is applied in the shoulder that produces after the first axial compressive force and central canal and sleeve pipe
Position relationship schematic diagram, does not applies a second axial pressure to packing element；
Fig. 4 is the structural representation of the packing element of one embodiment of the application；
Fig. 5 is the structural representation of the sealing ring of one embodiment of the application；
Fig. 6 is the cross sectional representation of the sealing ring of one embodiment of the application；
Fig. 7 is the cross sectional representation of the sealing ring of another embodiment of the application；
Fig. 8 is the cross sectional representation of the sealing ring of the application further embodiment；
Fig. 9 is the structural representation of the packing element of another embodiment of the application；
Figure 10 is the structural representation of the packing element of the application further embodiment；
Figure 11 is that the packing element shown in Figure 10 is by the structural representation after the first axial compressive force compression；
Figure 12 is the structural representation of the about collar that one embodiment of the application relates to；
Figure 13 is the structural representation comprising the about packing element of collar of one embodiment of the application, before it illustrates compression
About collar and the position relationship of packing element other parts；
Figure 14 be in Figure 13 packing element by the structural representation in the first axial compressive force compression process；
Figure 15 is that in Figure 13, packing element, by the structural representation after the first axial compressive force compression, it illustrates the constraint after compression
Set and the position relationship of packing element other parts；
Figure 16 is the structural representation of the packing element of the syllogic according to one embodiment of the application.
Reference in figure is as follows:
10-packing element, 101-outer surface, 102-inner surface, 103-through hole, 104-upper end, 105-pars intermedia, 106-lower end
Portion, 107-shoulder；
108-matrix, 109-colloid, 111-the first copper sheet, copper sheet inside 111a-, copper sheet outside 111b-, 111c-opening,
112-the second copper sheet, 113-the 3rd copper sheet；
20-about collar, 21-necking end, 22-flared end；
30-central canal；
40-sleeve pipe；
50-rigidity spacer ring；
60-is protruding；
70-sealing ring, 71-upper end sealing ring, 72-intermediate seal ring, 73-lower end sealing ring；
200-compression packer；
A-the first axial direction；
B-the second axial direction；
F1-the first axial compressive force；
F2-the second axial compressive force.
Detailed description of the invention
Direction hereinafter described " on ", D score is all using Fig. 2 as with reference to 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 are 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
Trip out.
As in figure 2 it is shown, packing element 10 is positioned at sleeve pipe 40 and the annular space of central canal 30 composition, rigidity spacer ring 50 is axially
First axial compressive force F of (the i.e. first axial direction A) from top to bottom is provided on direction1, can also remove in other embodiments
Rigidity spacer ring 50 by packing element 10 being applied the first axial compressive force F1Other parts replace.As in figure 2 it is shown, packing element 10 liang
End is upper end 104 and bottom 106, and pars intermedia 105 is 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 for bear in axial direction with the first axial compressive force F1Phase
The second anti-axial compressive force F2.As a part for packing element 10, upper end 104, bottom 106 and pars intermedia 105 all should have
Flexible.As to elastic a kind of explanation and the restriction of elastic size, when the first axial compressive force F1Put on upper end 104
Time, upper end 104, pars intermedia 105 and bottom 106 all deform upon in radial direction；When the second axial compressive force F2Put on
During bottom 106, upper end 104, pars intermedia 105 and bottom 106 all deform 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 this hypotenuse in other embodiments.
As it is shown on figure 3, inventor finds, when upper end 104 is by the first axial compressive force F1Time, upper end 104 can produce
The biggest shoulder 107, when applying a second axial pressure F again2Time, upper end 104 can be isolated at shoulder 107 in figure 3.
Describe the application below reduce or prevent the structure of shoulder 107 from designing.
In the embodiment shown in fig. 4, packing element 10 generally tubular, packing element 10 has the through hole 103 being positioned at center, this through hole
103 are limited by inner surface 102 and are formed, 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 is acted on along the first axial direction A2Along the second axial direction B effect
When bottom 106, packing element 10 entirety will be axially compressed and be radially expanded and (have with " deforming upon in radial direction "
Have identical implication), promote outer surface 101 outwardly convex and inner surface 102 inwardly protruding, but outside in sequential being usually
Surface 101 partly outwardly convex.Applying the first axial compressive force F1After, inner surface 102 and the central canal in Fig. 1 and Fig. 2
30 seal, and outer surface 101 seals with the sleeve pipe 40 in Fig. 1 and Fig. 2.Usually, the space between inner surface 102 and central canal 30
Less (the most bonded to each other), and the gap between outer surface 101 and sleeve pipe 40 is relatively big, due to central canal 30 and sleeve pipe 40 respectively
The maximum protruding size of inner surface 102 and outer surface 101 is defined, so causing outer surface 101 outwardly convex
Degree is more than the inwardly protruded degree of inner surface 102.
As it has been described above, upper end 104, bottom 106 and pars intermedia 105 all should have elasticity, but in Fig. 2 and Fig. 4 institute
Showing in 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
Time, pars intermedia 105 is more than the upper end 104 deformation in radial direction in the deformation of radial direction.
Owing to 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 F1Time, upper end 104 is by this first axial compressive force F more1Pass to pars intermedia 105 and bottom 106 not for certainly
The radial deformation of body.So can use the first less axial compressive force F1Time can allow pars intermedia 105 and 106, bottom
Raw radial deformation, thus reach the sealing of packing element 10 entirety.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 F1Time, it is more the radial direction change for self
Shape rather than pass to pars intermedia 105 and bottom 106, prevent or reduce shoulder 107 as shown in Figure 3.
According to the technical scheme of the application, in the case of 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 the least.Less shoulder 107 can be effectively prevented packing element 10 and isolate, and has reached to prevent packing element 10 seal failure
Effect.
Owing to the radial direction deformation of upper end 104 is less, it is likely that ground, now upper end 104 radial direction deformation
Through deficiency, sleeve pipe 40 and central canal 30 are sealed, say, that now sealing function will no longer be played in upper end 104, and be only
The first axial compressive force F that will be subject to1Passing to pars intermedia 105 and bottom 106, this is packing element 10 and the prior art of the application
A critically important difference of packing element.And, even if the radial direction deformation of upper end 104 relatively big and by sleeve pipe 40 and center
Pipe 30 seals, and the now sealing of upper end 104 is the most only that seal this packing element 10 one supplements, and no matter whether upper end 104
Playing sealing function, upper end 104 hardness is more than the setting of pars intermedia 105 hardness, it is therefore prevented that shoulder 107 excessive and cause
Packing element 10 isolates, also can be by the first less axial compressive force F1Packing element 10 is sealed.
According to the technical scheme of the application, in the case of 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 is in the first axial compressive force F1May be also under Zuo Yong
Do not contact with sleeve pipe 40 and do not play sealing function.Under this kind of special construction, hard when bottom 106 and 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.So packing element 10 of the application
With the packing element of prior art in the structure sealed entirely different.
As a preferred embodiment, when the outer wall of upper end 104 and the inwall of sleeve pipe 40 are inconsistent, be more preferably on
During the inner wall sealing of the outer wall of end 104 and sleeve pipe 40, now it is covered in pars intermedia the basic homalographic in the bottom of upper end 104
The top of 105, upper end 104 and pars intermedia 105 be substantially not present difference in the radial direction, it is thus possible to pars intermedia 105 with
What the generation of junction, upper end 104 was downward compresses effect, prevents or reduces pars intermedia 105 and the appearance of junction, upper end 104
Shoulder.
If in order to reach " to be by this first axial compressive force F more as above1Pass to pars intermedia 105 and lower end
Portion 106 is not for the radial deformation of self " 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, then the pars intermedia 105 with metal block contact can produce bigger shoulder
107, if being relatively large in diameter of metal derby, then consider the bending situation of sleeve pipe 40, metal derby is difficult to slide into conjunction in sleeve pipe 40
Suitable position, and if enter foreign body in sleeve pipe 40, bigger metal derby is not easy to detach in sleeve pipe.On the other hand,
Lifting force is less, can not be detached in sleeve pipe 40 by metal derby, and lifting force is relatively big then may damage sleeve pipe 40.Consider, this
The upper end 104 that application uses has elasticity, but needs to be defined the elasticity of upper end 104, i.e. the hardness of upper end 104
More than the hardness of pars intermedia 105, the diameter that such upper end 104 can be done is less, convenient at set in-pipe, such as upper end
104 can be identical with the diameter of pars intermedia 105.Owing to upper end 104 is harder, himself it is not easily formed shoulder 107 or is formed
Shoulder 107 less, due to compression time upper end 104 deform upon in radial direction gradually extensional, reduce
Space between end 104 and sleeve pipe 40, thus reduce or prevent the formation of shoulder and the size of formation of pars intermedia 105.
In one embodiment, the hardness of bottom 106 is more than the hardness of pars intermedia 105, so that bottom 106 bears the
Two axial compressive forces F2Time, pars intermedia 105 is more than the bottom 106 deformation in radial direction in the deformation of radial direction.Based on same
The principle of sample, such structure is prevented from bottom 106 and is bearing the first axial compressive force F1Or the second axial compressive force F2Time produce
Raw shoulder, and can prevent bottom 106 from bearing the second axial compressive force F further in the case of having produced shoulder2
Shi Zaocheng shoulder becomes big, thus prevents bottom 106 from being isolated and causing packing element 10 seal failure.
In another embodiment, upper end 104 is essentially identical with the hardness of bottom 106, say, that upper end
104 are all higher than the hardness of pars intermedia 105 with the hardness of bottom 106, the most no matter by the first axial compressive force F1Or second
Axial compressive force F2Time, 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 and bottom 106 occur shoulder 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.As a example by Fig. 4, in the first axial direction A, on the most top-down direction, three sealing rings 70 are respectively
Upper end sealing ring 71 above, intermediate seal ring 72 and be positioned at the lower end sealing ring 73 of lower section.Upper end sealing ring 71 serves as
Upper end 104, intermediate seal ring 72 serves as pars intermedia 105, and lower end sealing ring 73 serves as bottom 106.In embodiment illustrated in fig. 9
In, the quantity of the intermediate seal ring 72 between upper end sealing ring 71 and lower end sealing ring 73 is three.At Figure 10 and Figure 11
In illustrated embodiment, the quantity of intermediate seal ring 72 is nine.In other embodiments, the quantity of intermediate seal ring 72 is all right
It is set to other quantity.
Come specifically to describe shape and the structure of sealing ring 70 below.
In process of the test, inventor finds, owing to the soft or hard of packing element 10 is variant, such as, polyether-ether-ketone and the glue made
Cylinder 10 is harder, makes packing element 10 reach to set the first axial compressive force F of needs1In nominal amount first is axially pressed relatively greatly in other words
Power F1Lower rubber cylinder 10 deforms deficiency, causes packing element 10 cannot play sealing function.When using softer colloid to make packing element 10,
This packing element 10 again can be because sustaining the first axial compressive force F of nominal amount1And by conquassation or i.e. allow to sustain
One axial compressive force F1But it is being subsequently subjected to the second axial compressive force F2Time packing element also can be by conquassation.
Inventor is during solution packing element 10 is softer, and once adulterated in colloid multiple high temperature high voltage resistant 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 is each connected with colloid, but each cellosilk
Between be substantially not connected to or connect less, so the hardness of packing element 10 can only the most limitedly be increased.So, inventor devises
Following technical scheme: as it is shown in figure 5, use cross one another plurality of fibers silk to form a matrix 108, and make colloid 109
Being distributed on the surface of matrix 108 and bonding each cellosilk is to form sealing ring 70, the sealing ring 70 of this spline structure has in footpath
To the ductility in direction, in other words, make the sealing ring 70 can be the most straight due to the mutual tied up in knots of each cellosilk
Footpath becomes does not ruptures (the most filametntary fracture), during sealing ring 70 diameter becomes greatly, cross one another
Cellosilk promotes, by offsetting a part, the first axial compressive force F that the change of its diameter is big1, thus to make the diameter of sealing ring 70 increase
The most to a certain extent, it is desirable to provide the first bigger axial compressive force F1.Especially, colloid 109 is by the cellosilk of each intersection tightly
Link together, to make the diameter of sealing ring 70 increase to a certain degree, it is necessary to the first bigger axial compressive force F1。
For conclusion, each cellosilk intersects to form a resistance, and colloid 109 forms again a resistance by bonding for each cellosilk,
Under the effect of the two resistance, the more difficult compression of packing element 10 entirety, it is overall hardening that this is equivalent to packing element 10.When sealing ring 70
When filametntary quantity in certain volume is roughly the same, inventor finds to adjust phase by changing the thickness of sealing ring
The filametntary quantity intersected mutually, and then the first axial compressive force F needed for adjusting1Size be i.e. applied to setting of packing element 10
The size of power.Intersect likewise it is possible to adjusted by the filametntary quantity in the certain volume of increase sealing ring 70
Filametntary quantity, and then also can adjust the first required axial compressive force F1Size.The upper end that above two mode makes
Sealing ring 71, all can make the hardness hardness more than intermediate seal ring 72 of upper end sealing ring 71.
Returning to Fig. 5, for the clear needs in structure, Fig. 5 illustrate only the colloid being coated on matrix 108 all surface
109, and the colloid 109 within not shown infiltration matrix 108.As an explanation to surface herein, such as when matrix 108
When cross section is circular, the colloid 109 in Fig. 5 is positioned 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 resistant 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 is embodiment
Silk can also otherwise be woven together and form matrix 108.
By narration above, in the technical scheme of the application, this cellosilk is not necessarily needed to have elasticity,
This is owing to contraction and the expansion of packing element 10 are completed by colloid 109.Mentioned above, colloid 109 is distributed in the table of each matrix 108
On face and internal and by bonding for each cellosilk.It is desired that the bonding every cellosilk of colloid 109, and each cellosilk is handed over
Bond together fork.
The copper sheet of cladding is described in detail below on packing element 10.
Inventor finds, after the problem solving shoulder 107, if packing element 10 selects suitable material, can play close
Envelope effect, but through the shortest time (such as six hours) packing element 10 or meeting seal failure in the environment of High Temperature High Pressure, right
The packing element 10 lost efficacy is researched and analysed, and finds that packing element is not the most to lose efficacy because of rupturing of shoulder 107, and is because packing element
Fester and lost efficacy in the bottom 106 of 10.Through research, little point of this high temperature and high pressure steam being contained within downhole gas that festers
Son can produce what degraded caused to the packing element of macromolecular material.After packing element 10 seals, the only lower surface of bottom 106 and well
Spirit body directly contacts, thus causes packing element 10 to degrade from the bottom up inefficacy.
In the embodiment shown in fig. 6, sealing ring 70 is coated with the first copper sheet 111, this first copper sheet 111 cladding sealing ring
The lower surface (lower portion) of 70, medial surface (left-hand component), lateral surface (right-hand component).It can be seen that the first copper sheet 111 has
Opening 111c, opening 111c is had to be positioned at the upper surface of sealing ring 70, and along the upper surface extension of sealing ring 70.An enforcement
In example, see Fig. 5, opening 111c and 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, flow out for the gas of remaining in sealing ring 70, the sealing ring arranged on top
The gas that can also stop High Temperature High Pressure when this perforate being compressed flows into from this perforate.In the embodiment shown in fig. 6, opening 111c will
Second copper sheet 112 covers, and can also be used with the second copper sheet 112 in other embodiments and covers this opening 111c.
In the embodiment shown in fig. 7, sealing ring 70 is coated with the 3rd copper sheet 113, the 3rd copper sheet 113 cladding sealing ring 70
Lower surface, medial surface, lateral surface and upper surface.When the first copper sheet 111 is also coated on the upper surface of lower end sealing ring 73,
The shape of the first copper sheet is identical with the 3rd copper sheet 113.
In the embodiment shown in fig. 8, sealing ring 70 is coated with inner side copper sheet 111a and outside copper sheet 11b, inner side copper sheet
A part of lower surface of 111a cladding sealing ring 70, whole medial surface (left-hand component) and a part of upper surface.Outside copper sheet
A part of lower surface of 11b cladding sealing ring 70, whole lateral surface (right-hand component) and a part of upper surface.And inner side
Copper sheet 111a and outside copper sheet 11b all has the part of the superposition that overlaps in upper and lower surface.
Seeing Fig. 9, packing element 10 has 71, lower end sealing ring 73 of a upper end sealing ring and three intermediate seal rings
72.In this embodiment, lower end sealing ring 73 can be coated with the copper sheet of the such structure of Fig. 6, Fig. 7 or Fig. 8.So, in Fig. 9 institute
After the packing element 10 that shows seals, it is possible to prevent the little molecule of high temperature and high pressure steam the lower surface of lower end sealing ring 73 is caused corrosion and
Degraded.Further, owing to lower end sealing ring 73 is only conflicted with central canal 30 and sleeve pipe 40, only play slight sealing function,
It is likely that there are gap, so being also required on the lateral surface of lower end sealing ring 73 cover between lower end sealing ring 73 and sleeve pipe 40
Copper sheet.Owing to the upper surface of lower end sealing ring 73 is compressed by the lower surface of the intermediate seal ring 72 of bottom, completely cut off and high temperature
The little molecule of high steam directly contact, in terms of this from the point of view of, the upper surface of lower end sealing ring 73 be not required to cover copper
Skin.But if the upper surface of lower end sealing ring 73 does not cover copper sheet, then the opening part of copper sheet is necessarily located at lower end sealing ring 73
On lateral surface, so at packing element 10 by compression during radial deformation, the opening of copper sheet can be to lower end sealing ring 73 self
Or the intermediate seal ring 72 of bottom produces and isolates, the most in the embodiment shown in fig. 6, opening 111c is positioned on upper surface, for
Directly contacting of the further little molecule completely cut off with high temperature and high pressure steam, the second copper sheet 112 is covered by opening 111c.Fig. 8
In inner side copper sheet 111a and outside copper sheet 11b be " u "-shaped structure, when mounted can first by inner side copper sheet 111a from inner side
Surface cover is located on sealing ring 70, is set in sealing ring 70 and sections inner side copper sheet 111a by outside copper sheet 11b from lateral surface, this
Copper sheet can be conveniently mounted on sealing ring 70 by the structure of sample, improves installation effectiveness.For upper end sealing ring 71,
Structure after upper end sealing ring 71 combines with copper sheet can be for the structure shown in Fig. 6, Fig. 7 or Fig. 8.When for the structure shown in Fig. 6
Time, need that the first copper sheet 111 and the second copper sheet 112 are all revolved turnback and use, now opening 111c is by centre topmost
The upper surface of sealing ring 72 is pressed against, and such structure is prevented from upper end sealing ring 71 and opens when by the first axial compressive force F1
Mouth 111c opens.By structure shown in Fig. 6 being used separately as upper end sealing ring 71 and the narration of lower end sealing ring 73, it is known that
Opening 111c all should be pressed against by adjacent sealing ring, prevents from opening when by the first axial compressive force F1 or the second axial compressive force F2
Mouth 111c opens.Structure in Fig. 7, can weld at gap after being coated with by sealing ring 70 by using copper sheet again and realize.
Structure in Fig. 8, why the lap of inner side copper sheet 111a and outside copper sheet 11b is arranged at sealing ring 70 upper surface and
Lower surface, reason is, when the lap of inner side copper sheet 111a and outside copper sheet 11b be arranged at sealing ring 70 medial surface or
During lateral surface, when, in the first axial compressive force F1 or the second axial compressive force F2 compression process, adjacent sealing ring being produced
Effect is isolated in life, and lap is arranged at the upper and lower surface of sealing ring 70, and adjacent sealing ring can be to overlapping portion
Divide extruding, completely cut off directly contacting of the little molecule with high temperature and high pressure steam further.Inner side copper sheet 111a in Fig. 8 and outside
The structure shown in Fig. 7 can be formed after the overlapping welding of copper sheet 11b.
As a example by Fig. 9, the structure of lower end sealing ring 71 and copper sheet as shown in Figure 6, when upper end sealing ring 71 bears the first axle
To pressure F1Time, the first axial compressive force F1Going down and cause lower end sealing ring 73 and deform upon in radial direction, be so distributed in
The first copper sheet 111 on the inner surface of lower end sealing ring 73 can be conflicted with central canal 30, is distributed in the appearance of lower end sealing ring 73
The first copper sheet 111 on face can be conflicted with sleeve pipe 40, this can by the thickness of the first copper sheet 111 is configured to realize,
And the sealing ring 70 not the most being coated with copper sheet seals respectively with central canal 30 and sleeve pipe 40.In one embodiment, the first bronze medal
The thickness of skin 111 is 1mm.When upper end sealing ring 71 with the structure of copper sheet as it is shown in fig. 7, lower end sealing ring 71 to bear second axial
Pressure F2Time, the 3rd copper sheet 113 being coated in the shoulder formed by the upper surface of upper end sealing ring 71 does not ruptures.This can
With by the thickness of the 3rd copper sheet 113 is configured to realization, in one embodiment, the thickness of the 3rd copper sheet 113 is
1mm。
Need especially it is emphasized that sealing ring 70 outer cladding copper sheet, to realize sealing ring 70 and central canal 30 and sleeve pipe
The sealing of 40, i.e. metal and the sealing of metal, then need the biggest pressure.In embodiments herein, including one not
The sealing ring of cladding copper sheet, this sealing ring is normally at centre, is positioned at three intermediate seals the most in the embodiment shown in fig. 9
Intermediate seal ring 72 in the middle of ring 72 is not the most coated with copper sheet, and arbitrary intermediate seal ring 72 is not coated with
Copper sheet.The sealing ring 70 not being coated with copper sheet plays main sealing function, and lower end sealing ring 71 stops most High Temperature High Pressure
Steam, the intermediate seal ring 72 of bottom stops a part of high temperature and high pressure steam further, so arrives the centre of bottom
The high temperature and high pressure steam of sealing ring 72 is the most considerably less, is effectively reduced high temperature and high pressure steam to middle intermediate seal ring 72
Corrosion and degraded, extend the sealing persistent period of packing element 10.The quantity of the intermediate seal ring 72 not being coated with copper sheet is all right
It is arranged as required to two or more.When upper end sealing ring 71 is coated with copper sheet, mainly prevent or shoulder 107 with copper sheet, please
With reference to " reducing or prevent the structure of shoulder 107 from designing " above.
Seeing Figure 10, two ends 104,105 of packing element 10 can be levelling by colloid 109.Each sealing ring 70 is overall
On extend in circular and axial direction along packing element 10.When the thickness of the colloid 109 between adjacent base 108 is identical, energy
The hardness in equal area enough making packing element 10 as much as possible is essentially identical, prevents packing element 10 unbalance stress from locally occurring
Cave in.But, when as shown in figure 16, when packing element 10 is syllogic, each section of packing element can be all a single packing element, this
Packing element 10 shown in master drawing 16 is equivalent to be spliced in the axial direction by three separate packing elements.Figure 16 is only with glue
Cylinder 10 be syllogic as an example, packing element can also have other section, such as two sections or five sections in other embodiments.Need
Illustrating, in an embodiment of the application, rigidity spacer ring 50 can also be used between each sealing ring shown in Fig. 9,
Inventor finds, when the copper sheet of sealing ring 70 and cladding has part to protrude or part is harder, can serious impact offset with it
The deformation of the sealing ring touched.And rigidity spacer ring 50 can apply pressure to its upper and lower surfaces contacted equably, prevent from sealing
Because its rigidity is uneven, when by axial compressive force, surface or lower surface become uneven to ring 70 thereon, and prevent close
Upper surface or the lower surface of the sealing ring that seal ring 70 is adjacent to it because its rigidity is uneven cause uneven.
Owing to being mixed with cellosilk in colloid 109, when packing element 10 is by the first axial compressive force F1Or second axial compressive force F2And
When radial direction expands (inwardly or outwardly), cellosilk will limit this expansion, thus the structure increasing packing element 10 on the whole is hard
Degree, increases the comprcssive strength of packing element 10.Especially, when matrix 108 is circular, when sealing ring 70 is by the first axial compressive force F1
Or second axial compressive force F2Time, each sealing ring 70 stress ratio is more uniform, it is therefore prevented that the partial collapse of packing element 10.Further, at this
In one embodiment of application, the thickness of the adjacent colloid 109 between matrix 108 is identical, thus can guarantee that by first
Axial compressive force F1Or second axial compressive force F2Power is handed on by the sealing ring 70 of effect equably, it is therefore prevented that sealing ring 70 each
Part unbalance stress and by conquassation.
Seeing Figure 10, each sealing ring 70 is each other by the axial direction of the bonding and bonding each sealing ring 70 of colloid 109
Length sum equal to the length of through hole 103, thus form multiple seal section.In Fig. 5, the thickness of matrix 108 is 1.8cm-
2.5cm, quantity can be chosen as 2-12.Having 5 sealing rings 70 in the embodiment shown in fig. 9, the quantity of matrix 108 is also
5.Filametntary diameter is chosen as 7-30 μm, thus can have the cellosilk of substantial amounts, energy on a sealing ring 70
Improve the hardness of packing element 10 greatly.According to the test of inventor, the thickness of matrix 108 is to be advisable less than 2cm.This be because of
For, inventor finds, needs to penetrate in matrix 108 glue forming colloid 109 to form sealing ring 70, but along with matrix
The permeating speed increasing glue of 108 thickness will be the most slack-off.Especially after the thickness of matrix 108 is more than 2.5cm, glue oozes
The speed entered will be the slowest.So, in one embodiment, the thickness of each matrix 108 is 2cm, the most also
Can be 1.8cm or 2.5cm.
See Figure 10 and Figure 11, Figure 10 and Fig. 1 entirety and show the deformation by packing element during the first axial compressive force F1 10
Journey.As a example by packing element 10 shown in Figure 10, between adjacent sealing ring 70, there is colloid 109, be not affected by first at packing element 10 axial
Pressure F1Time, each sealing ring 70 all radial direction with packing element 10 become angle β, and β is 10 ° of angles in Fig. 10.In other embodiments
In, β can also be 5 ° of angles or 45° angle.The reason arranging β in the application is, when sealing ring 70 overall harder and by specified
First axial compressive force F of size1And cause packing element 10 when deforming deficiency and sealing function cannot be played, sealing ring 70 first from glue
The radial direction of cylinder 10 becomes angle β to become the radial direction level of sealing ring 70 and packing element 10, and then carries out radially convex again
Rising, such structure can improve the deformation extent of packing element 10.In the embodiment shown in fig. 9, it is not affected by the first axle at packing element 10
To pressure F1Time, each sealing ring 70 is all parallel with the radial direction of packing element 10.As it is shown in figure 1, the packing element 10 shown in Fig. 9 and Figure 10
By the first axial compressive force F1Time, all shorten at axial direction, and expand in radial direction, the most again at lower end sealing ring 73
Place applies a second axial pressure F2。
In an embodiment of the application, matrix 108 is graphite packing or carbon fiber packing.Packing (packing) is logical
Often being 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, such as square.In other embodiments, the cross section of matrix 108 can also be circular.
The about collar 20 of packing element 10 is described in detail below.
With reference to Figure 12, Figure 13, Figure 14 and Figure 15, as shown in figure 12, about collar 20 entirety is enlarging shape, and it has flared end
22 and necking end 21.Seeing Figure 13, the about flared end 22 of collar 20 is set on upper end 104 and bottom 106, real at other
Executing in example, flared end 22 can also only be set on one of upper end 104 and bottom 106, and it has mainly depended on that this end is
The no deformation that needs restraint prevents from deforming in compression process excessive.In Figure 13-Figure 15, the about quantity of collar 20 is two,
The flared end 22 of one of them about collar 20 is set in upper end 104, and the flared end 22 of another about collar 20 is set in lower end
In portion 106.Seeing Figure 14, about the necking end 21 of collar 20 is away from being flared end 22 sheathed upper end 104 or bottoms 106
For bearing from axial pressure.In figs. 13 and 14, only the needs of clear in structure and show schematically about collar
20 and the position relationship of packing element 10 other parts, it practice, about collar 20 is to combine closely in the end with packing element 10, i.e. both
Between contact with each other.It can be seen from fig. 15 that bearing the first axial compressive force F1After, about collar 20 entirety is cylindrically.Further,
The about flared end 22 of collar 20 is essentially identical with the diameter of necking end 21, and both diameters are identical with the internal diameter of sleeve pipe 40,
Now the outer surface 101 of packing element 10 seals with sleeve pipe 40, and the inner surface 102 of packing element 10 seals with central canal 30.
The about effect of collar 20 is the most extremely important, and this is owing to the sealing ring 70 of the application is the most axially arranged,
And be also from axial pressure to sealing ring 70 generation effect.So, it is however very well possible to ground, it is positioned at the upper end at packing element 10 two ends
Sealing ring 71 and lower end sealing ring 72 can be because of the first axial compressive forces F1Or second axial compressive force F2Effect and radial direction with in
Heart pipe 30 contacts in advance with sleeve pipe 40, causes intermediate seal ring 72 cannot produce radial protrusion because stress is too small.By constraint
Set 20 constraints in end, it is possible to first make intermediate seal ring 72 the most protruding, when middle sealing ring 72 is by central canal 30 and set
After pipe 40 limits, upper end sealing ring 71 and lower end sealing ring 72 occur again radial protrusion and band moving constraint set 20 generation Figure 13,
The such deformation of Figure 14 and Figure 15.Or first make intermediate seal ring 72 the most protruding, and in the process, upper end sealing ring 71
Also occur to deform as radial protrusion band moving constraint set 20 generation Figure 13, Figure 14 and Figure 15 with lower end sealing ring 72.Above-mentioned
The specialized designs that two ways is for preventing the two ends of packing element 10 protruding in advance and does.When about collar 20 and upper end 104
When harder design comes across packing element 10 jointly, it is possible to make pars intermedia 105 carry out preferentially deforming of radial direction without error.
In Figure 13 and embodiment illustrated in fig. 14, the edge of upper end 104 and bottom 106 through chamfered, come with
About collar 20 adapts, say, that is flared end 22 sheathed upper ends 104 and bottom 106 and comes and enlarging in reducing shape
End 22 matches.This design of packing element 10 can increase the end of packing element 10 and the contact area of about collar 20, and this kind
The end of design and the first axial compressive force F1Between there is angle, thus need the first bigger axial compressive force F1Glue could be compressed
Cylinder 10 produces the deformation of nominal amount, a certain degree of setting force increasing needs.As shown in figure 15, axial when applying first
Pressure F1After, packing element 10 inwardly or outwardly will extend to radial direction, and due to the constraint of sleeve pipe 40, the most about collar 20 will be
Sleeve pipe 40 carries out expansion radially in the range of limiting, and the most about the flared end 22 of collar 20 is by phase basic with the diameter of packing element 10
With, and the most essentially identical with the internal diameter of sleeve pipe 40.As shown in figure 14, in compression process, projection can be formed, in Figure 14 schematically
Show a projection 60, when actual compression, outer surface 101 entirety of packing element 10 expands outwardly as projection, simply this
The protruding speed at the middle part of packing element 10 is the most deliberately faster than its two ends by the design of about collar 20 by application
Protruding speed.Very important, if about collar 20 is chosen as the material of difficult deformation, then as shown in Figure 14, when
When continuing compression, protruding 60 will contact with the top edge of about collar 20, and finally cause shearing to protruding 60, have impact on packing element 10
Sealing.The most about collar is chosen as copper sheathing, and determines the maximum gauge of flared end 22 in upper thickness limit and be less than
2mm, flared end 22 refers to whole trumpet-shaped edge in such as Figure 12, rather than that end face of the rightmost side in Figure 12.So
Restriction enable to about collar 20 and will not cause damage to protruding 60, or damage is the slightest.And it is also beneficial in pressure
In compression process, about collar 20 is deformed and becomes as shown in Figure 15 by sleeve pipe 40.Based on same reason, can not
The about collar 20 of the perpendicular type as using as shown in Figure 15 before compression, otherwise during compression, about collar 20 is also
Gradually protruding outer surface 101 can be produced and shear and packing element 10 is produced and isolates.In this application, about collar 20 is horn mouth
Shape, during compression, about collar 20 is that a kind of face contacts rather than linear contact lay with protruding 60, greatly reduces protruding 60 damages
Probability.And as shown in figure 12, necking end 21 has inside bevelling, when compression, bevelling will be around central canal 30, and
Bevelling receives the first axial compressive force F1, such it is designed to make wedging ring 20 in an orderly manner, gradually deform, will not be by first
Axial compressive force F1Suddenly conquassation.Another major reason that the application selects about collar 20 to be copper sheathing is, so will insulate
When device 200 trips out from down-hole, copper sheathing is easily deformed, and will not be stuck between sleeve pipe 40.Based on same reason, it is also possible to select same
The yielding silver of sample is as about collar.
The application also provides for a kind of packer, and this packer has the packing element 10 that one of technique scheme is limited.
The application also provides for a kind of bridging plug, and this bridging plug has the packing element 10 that one of technique scheme is limited.
So far, although those skilled in the art will appreciate that the multiple of the most detailed the application of illustrate and describing show
Example embodiment, but, in the case of without departing from the application spirit and scope, still can be direct according to present disclosure
Determine or derive other variations or modifications of many meeting the application principle.Therefore, scope of the present application is it is understood that and recognize
It is set to and covers other variations or modifications all these.
Claims (10)
1. a packing element (10), the inner surface (102) there is the through hole (103) being positioned at center, being positioned at described through hole (103) place,
The outer surface (101) corresponding with described inner surface (102), lay respectively at described packing element (10) two ends upper end (104) and
Bottom (106) and the pars intermedia (105) being positioned between described upper end (104) and described bottom (106), described upper end
Portion (104) is for bearing the first axial compressive force in axial direction, and described bottom (106) are used for bearing along described axial direction
Second axial compressive force contrary with described first axial compressive force；When described first axial compressive force puts on described upper end
(104), time, described upper end (104), pars intermedia (105) and bottom (106) all deform upon in radial direction；When described
When two axial compressive forces put on described bottom (106), described upper end (104), pars intermedia (105) and bottom (106) are equal
Deform upon in described radial direction, it is characterised in that
Described packing element (10) by one be positioned at the upper end sealing ring (71) of upper end, lower end sealing ring (73) being positioned at lower end,
The more than one intermediate seal ring (72) being positioned between described upper end sealing ring (71) and described lower end sealing ring (73) is in institute
Stating axial direction arrangement to form, described upper end (104) is served as in described upper end sealing ring (71), and described lower end sealing ring (73) is filled
When described bottom (106), described intermediate seal ring (72) serves as described pars intermedia (105)；
Wherein, described lower end sealing ring (73) is coated with the first copper sheet (111), described first copper sheet (111) be coated with described under
Upper surface, lower surface, medial surface and the lateral surface of end sealing ring (73)；The thickness of described first copper sheet (111) is set to, when
When described first axial compressive force is born in described upper end (104), described lower end sealing ring (73) is in described radial direction generation shape
Become and make the first copper sheet (111) being distributed on the described inner surface of described lower end sealing ring (73) can conflict with central canal, with
And the first copper sheet (111) being distributed on the described outer surface of described lower end sealing ring (73) can conflict with sleeve pipe；
The edge of described first copper sheet (111) upper surface in described lower end sealing ring (73) forms ring-type opening (111c).
Packing element the most according to claim 1 (10), it is characterised in that
The second copper sheet (112) that described upper surface in described lower end sealing ring (73) is arranged cover described opening (111c) or
Described second copper sheet (112) is covered by opening described in person (111c).
Packing element the most according to claim 1 (10), it is characterised in that
Described upper end sealing ring (71) is coated with the 3rd copper sheet (113), and described 3rd copper sheet (113) is coated with described upper end and seals
Lower surface, medial surface, lateral surface and the upper surface of ring (71)；The thickness of described 3rd copper sheet (113) is set to, under described
When described second axial compressive force is born in end (106), it is coated on and is formed by the described upper surface of described upper end sealing ring (71)
Described 3rd copper sheet (113) in shoulder does not ruptures.
Packing element the most according to claim 1 (10), it is characterised in that
The quantity of described intermediate seal ring (72) is three, wherein the described intermediate seal ring (72) of bottom and institute topmost
Stating intermediate seal ring (72) and be all coated with copper sheet, middle described intermediate seal ring (72) is not coated with copper sheet.
Packing element the most according to claim 1 (10), it is characterised in that
The hardness of described upper end sealing ring (71) is more than the hardness of described intermediate seal ring (72), so that described upper end sealing ring
(71), when bearing described first axial compressive force, described intermediate seal ring (72) seals more than described upper end in the deformation of radial direction
Ring (71) is in the deformation of radial direction；
The hardness of described lower end sealing ring (73) is more than the hardness of described intermediate seal ring (72), so that described lower end sealing ring
(73), when bearing described second axial compressive force, described intermediate seal ring (72) seals more than described lower end in the deformation of radial direction
Ring (73) is in the deformation of radial direction.
Packing element the most according to claim 5 (10), it is characterised in that
Described upper end sealing ring (71) is essentially identical with the hardness of described lower end sealing ring (73), so that described upper end sealing ring
(71), when bearing described first axial compressive force, described intermediate seal ring (72) seals more than described upper end in the deformation of radial direction
Ring (71) and described lower end sealing ring (73) are in the deformation of radial direction, and described lower end sealing ring (73) bears described second
During axial compressive force, described intermediate seal ring (72) is more than described upper end sealing ring (71) and described lower end in the deformation of radial direction
Sealing ring (73) is in the deformation of radial direction.
Packing element the most according to claim 1 (10), it is characterised in that
Described intermediate seal ring (72) has colloid (109) and in circular matrix (108), and described matrix (108) is by mutually
The plurality of fibers silk composition of the high temperature high voltage resistant intersected, the bonding each described cellosilk of described colloid (109), and described colloid
(109) it is distributed on the surface of each described matrix (108) so that the multiple described sealing ring (70) arranged along described axial direction
Inside and outside form described inner surface (102) and outer surface (101) respectively.
Packing element the most according to claim 7 (10), it is characterised in that
Described matrix (108) is graphite packing or carbon fiber packing or glass fibre packing.
9. a packer, it is characterised in that include the packing element (10) that one of claim 1-8 is described.
10. a bridging plug, it is characterised in that include the packing element (10) that one of claim 1-8 is described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620606236.4U CN205714081U (en) | 2016-06-20 | 2016-06-20 | Lower end sealing ring is coated with the packing element of opening copper sheet, packer and bridging plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620606236.4U CN205714081U (en) | 2016-06-20 | 2016-06-20 | Lower end sealing ring is coated with the packing element of opening copper sheet, packer and bridging plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205714081U true CN205714081U (en) | 2016-11-23 |
Family
ID=57315041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620606236.4U Withdrawn - After Issue CN205714081U (en) | 2016-06-20 | 2016-06-20 | Lower end sealing ring is coated with the packing element of opening copper sheet, packer and bridging plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205714081U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888602A (en) * | 2016-06-20 | 2016-08-24 | 天鼎联创密封技术（北京）有限公司 | Rubber sleeve with lower end seal ring covered with opened copper sheet, packer and bridge plug |
-
2016
- 2016-06-20 CN CN201620606236.4U patent/CN205714081U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888602A (en) * | 2016-06-20 | 2016-08-24 | 天鼎联创密封技术（北京）有限公司 | Rubber sleeve with lower end seal ring covered with opened copper sheet, packer and bridge plug |
| CN105888602B (en) * | 2016-06-20 | 2019-05-03 | 天鼎联创密封技术（北京）有限公司 | Lower end sealing ring is coated with packing element, packer and the bridge plug of opening copper sheet |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161123 Effective date of abandoning: 20190503 |