CN106014329A - Rubber sleeve without copper sheet coating inner side face of sealing ring at lower end, packer and bridge plug - Google Patents
Rubber sleeve without copper sheet coating inner side face of sealing ring at lower end, packer and bridge plug Download PDFInfo
- Publication number
- CN106014329A CN106014329A CN201610526115.3A CN201610526115A CN106014329A CN 106014329 A CN106014329 A CN 106014329A CN 201610526115 A CN201610526115 A CN 201610526115A CN 106014329 A CN106014329 A CN 106014329A
- Authority
- CN
- China
- Prior art keywords
- sealing ring
- packing element
- copper sheet
- end sealing
- compressive force
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
- E21B33/1277—Packers; Plugs with inflatable sleeve characterised by the construction or fixation of the sleeve
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/134—Bridging plugs
Abstract
The invention relates to the field of sealing, in particular to a rubber sleeve which is used in the oil exploitation industry, can bear high temperature and high pressure and does not coat the inner side face of a sealing ring at the lower end with a copper sheet, a packer and a bridge plug. The outside of the sealing ring at the lower end of the rubber sleeve is coated with a first copper sheet; the upper surface, the lower surface and the outer side face of the sealing ring at the lower end are coated with the first copper sheets but the inner side face of the sealing ring at the lower end is not coated with the first copper sheet; the thicknesses of the first copper sheets are set as follows: when an upper end part bears a first axial pressure, the sealing ring at the lower end deforms in the radial direction, further the first copper sheet distributed on the inner side face of the sealing ring at the lower end is enabled to prop against a central pipe, and the first copper sheet distributed on the outer surface of the sealing ring at the lower end is enabled to prop against a casing pipe. The sealing ring at the lower end, disclosed by the invention, is coated with the first copper sheets, so that a degradation effect of micromolecules of high-temperature and high-pressure steam on the rubber sleeve is reduced or prevented, and the long-term efficacy of rubber sleeve sealing is improved.
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
The lower end sealing ring medial surface of high pressure is not coated with the packing element of copper sheet, packer and bridging plug.
Background technology
Packer be oil field well recover the oil a kind of key tool, be widely used in oil field dispensing, separate zone stimulation,
The several work such as oil production by layer, mechanical pipe water blockoff, packer needs to carry out the packing of annular space, to realize oil
Edema caused by disorder of QI layer, and the core component realizing annular space packing is packing element.Bridging plug is also to commonly use in oil extraction operation
A kind of instrument of oil gas layering.The main distinction of packer and bridging plug is, packer is usually in pressure break, acid
Change, temporary transient when looking for the construction of the measure such as leakage stay in well, and bridging plug be when measures such as sealing oil recoveries temporarily or
For good and all stay in well.Packer and central canal stay well simultaneously, and mixing gives up can individually stay well, and bridging plug
It is then individually to stay well.Structurally, packer is hollow structure, can flow freely oil gas water, and bridge
It 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 crucial portion sealed
Part, its quality directly affects packer and the sealing effectiveness of bridging plug and service life, in packer and bridging plug
Play conclusive effect.Packing element typically uses rubber type of material to make, therefore referred to as packing element.But packing element is only
It is the interior technical term arranging to become social custom of a kind of industry, for representing the functional parts playing sealing function, and
Refer not only to packing element to be made by rubber.When packing element bears certain pressure to promote its deformation for sealing
Time, need to consider the deformability of packing element itself, if deformation deficiency can cause it cannot play sealing function；
If deformation is excessive, packing element may be caused to lose efficacy because of conquassation, lose recovery capability.The most important thing is, work as glue
Cylinder 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 losing recovery capability.
" petroleum machinery " of the 9th phase in 2002 discloses " packer compression packing element " protrusion-dispelling " new construction ",
Wherein record following content: " so-called protrusion-dispelling, it is simply that lay in packing element end certain blocker ring, support member,
Limiting device and guard member etc., when being used for organizing and limit packer setting, packing element highlights towards oil sets annular space
Or flowing "." owing to anti-lug structure is used to cover the annular gap between packer and sleeve pipe, packer is sat
Feng Shi, once packing element deformation contacts with casing wall, and under load effect outside, outburst prevention device covers envelope with regard to unfolded
Annular space every between device and casing wall, stops packing element towards prominent in this annular space, and it is each to homogeneous compaction for forcing packing element
State, produces and keeps the contact stress that packing element is higher, thus obtain good sealing "." ... main
There are copper bowl curing type and steel mesh or steel band curing type two kinds.The former is that copper bowl thick for two 2mm is solid respectively
Changing on two end packing element 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 " improvement of packer rubber barrel structure and advantage
Analysis " article, wherein record herein below: " on conventional packer, string has 3 packing elements, be divided into,
In, the lower identical and upper lower rubber cylinder of 3 packing element physical dimensions be long packing element type, middle packing element be 2 kinds of structures of short rubber cylinder
Form.By finding the research of traditional three packing element structures, play main seal effect is upper packing element ".And
And, carry out nonlinear analysis by non linear finite element analysis software Abaqus and draw: " along with axially carrying
Lotus increases, and axial compression amount also increases, and during beginning, decrement increases more apparent, and decrement increase subsequently slows down,
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
Added-time 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 is substantially completely compacted, the slight shoulder of packing element upper end appearance, but not
Occurring packing element to isolate phenomenon, shoulder is within allowed band ".
" improvement of high-pressure packer cartridge " in the first phase in 2009 " oil field equipment " is recognized
For " owing to rubber surface is easily torn, therefore considering to add layer of metal sheet (such as copper on the top layer of rubber
Sheet) ".
Above-mentioned prior art only analyzes applying the first axial compressive force (being equivalent to " axial load ") to packing element
The impact of deformation.But in actual production process, need first packing element applies one top-down first
Axial compressive force makes packing element produce sealing；The most again packing element is applied second axial compressive force from bottom to top
(material impact to packing element such as downhole gas).According to the test of inventor, when the first axial compressive force is 30
During MPa, inventor finds that shoulder all can occur in almost all of packing element, further applies a second axial pressure
During power (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 the materials such as downhole gas are to packing element
During impact, the little molecule of the high temperature and high pressure steam being contained therein can produce degraded to the packing element of macromolecular material
Effect, causes packing element first to follow the string in bottom and cannot play sealing function, affects what packing element sealed
Long-lasting.
Summary of the invention
One purpose of the application is the packing element providing a kind of new structure to design, and prevents packing element from sealing and loses
Effect.
An aspect according to the application, it is provided that a kind of packing element have be positioned at center through hole, be positioned at described logical
Inner surface at the hole outer surface corresponding with described inner surface, lay respectively at the upper end at described packing element two ends
Portion and bottom and the pars intermedia between described upper end and described bottom, described upper end is used for
Bear the first axial compressive force in axial direction, described bottom for bear along described axial direction with institute
State the second axial compressive force that the first axial compressive force is contrary；When described first axial compressive force puts on described upper end
Time, described upper end, pars intermedia and bottom all deform upon in radial direction；When described second axially presses
When power puts on described bottom, described upper end, pars intermedia and bottom all occur in described radial direction
Deformation, described packing element by one be positioned at the upper end sealing ring of upper end, lower end sealing ring being positioned at lower end,
More than one intermediate seal ring between described upper end sealing ring and described lower end sealing ring is described
Axial direction arrangement forms, and described upper end sealing ring serves as described upper end, and described lower end sealing ring serves as institute
Stating bottom, described intermediate seal ring serves as described pars intermedia；
Wherein, described lower end sealing ring is coated with the first copper sheet, and it is close that described first copper sheet is coated with described lower end
The upper surface of seal ring, lower surface and lateral surface and be not coated with the medial surface of described lower end sealing ring；Described
The thickness of one copper sheet is set to, and when described first axial compressive force is born in described upper end, described lower end seals
Ring deforms upon in described radial direction and makes be distributed on the described medial surface of described lower end sealing ring
One copper sheet can be conflicted with central canal, and is distributed in the first bronze medal on the described outer surface of described lower end sealing ring
Skin can be conflicted with sleeve pipe.
Preferably, the edge of opening of described first copper sheet is concordant with the medial surface of described lower end sealing ring.
Preferably, described upper end sealing ring is coated with the 3rd copper sheet, and described 3rd copper sheet is coated with described upper end
The upper surface of sealing ring, lower surface and lateral surface and be not coated with the medial surface of described upper end sealing ring；Described
The thickness of the 3rd copper sheet is set to, and when described second axial compressive force is born in described bottom, is coated on by institute
Described 3rd copper sheet in the shoulder of the described upper surface formation stating upper end sealing ring does not ruptures.
Preferably, the quantity of described intermediate seal ring is three, wherein the described intermediate seal ring of bottom with
Described intermediate seal ring topmost is all coated with copper sheet, and 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 on described
When end sealing ring bears described first axial compressive force, described intermediate seal ring is more than institute in the deformation of radial direction
State the deformation in radial direction of the upper end sealing ring；
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
When bearing described second axial compressive force, described intermediate seal ring is close more than described lower end in the deformation of radial direction
Seal ring is in the deformation of radial direction.
Preferably, described upper end sealing ring is essentially identical with the hardness of described lower end sealing ring, so that on described
When end sealing ring bears described first axial compressive force, described intermediate seal ring is more than institute in the deformation of radial direction
State the deformation in radial direction of upper end sealing ring and described lower end sealing ring, and described lower end sealing ring bears
During described second axial compressive force, described intermediate seal ring is more than described upper end sealing ring in the deformation of radial direction
With 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 mutually handing over
The plurality of fibers silk composition of the high temperature high voltage resistant of fork, the bonding each described cellosilk of described colloid, and described glue
Body is distributed on the surface of each described matrix so that the multiple described sealing ring that arranges along described axial direction
Inside and outside form described inner surface and outer surface respectively.
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 technique scheme
One of the packing element that limited.
Another aspect according to the application, it is provided that a kind of bridging plug, this bridging plug has one of technique scheme
The packing element limited.
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 is more than the hardness of pars intermedia, so in upper end
When portion is by the first axial compressive force, upper end be more this first axial compressive force is passed to pars intermedia and under
End is not for the radial deformation of self.So can be able to allow when using the first less axial compressive force
There is radial deformation in pars intermedia and bottom, thus reaches 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, the application is by upper end
The hardness in portion is set greater than the hardness of pars intermedia, so in the first axial compressive force effect by formed objects
Time, upper end is less in the deformation of radial direction, it is accordingly required in particular to it is noted that correspondingly upper end is because of radially
The shoulder deformed and formed is the least.Less shoulder can be effectively prevented packing element and isolate, and has reached to prevent
The effect of packing element seal failure.
3, in one embodiment, owing to matrix comprising plurality of fibers silk, when filametntary quantity is more
Sealing ring is partially hard, and when filametntary negligible amounts, sealing ring is the softest, thus can be according to filametntary number
Amount regulates the soft or hard degree of sealing ring, so can directly change packing element by the hardness changing sealing ring
Overall hardness, reaches to increase the purpose of the comprcssive strength scope of packing element.
4, the matrix of the application has cross one another cellosilk, and colloid is by bonding for each cellosilk.When packing element is subject to
When expanding to the first axial compressive force, cellosilk will limit this expansion, thus increases the knot of packing element on the whole
Structure hardness, increases the comprcssive strength of packing element.
5, multiple sealing rings that the application relates to axially arrange, if there being indivedual sealing ring during oil exploitation
Damage, the sealing ring of damage can be replaced by new sealing ring, and remaining sealing ring is no longer changed.So
For on the whole, add the use duration that single sealing ring is average, it is possible to be greatly reduced the use of packing element
Amount, 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, this
Sample, when colloid is combined into as sealing ring with graphite packing or carbon fiber plate root, packing entirety can play props up
Support effect, and colloid can play deformation and seal the effect strengthened.The application selects existing packing, and not
With making the special packing as matrix, by increasing capacitance it is possible to increase the motility of production.According to the inventors knowledge, existing
Graphite packing and carbon fiber packing can tolerate the effect of High Temperature High Pressure, but graphite packing and carbon fiber plate
The resilience of root is poor.In this application, colloidal dispersions is among packing, after the first axial compressive force disappears
The packing that 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, is so axially pressed by first at packing element
The masterpiece used time, first sealing ring becomes parallel with the radial direction of packing element, and then sealing ring is just carried out radially
Inwardly or outwardly protruding.And in the state that sealing ring is become parallel with radial direction from heeling condition, seal
Ring self can't produce the deformation of radial direction, and simply packing element can produce the deformation of radial direction.So,
As a whole, the deflection of the radial direction of packing element is added, it is possible to overcome packing element harder and radial direction
The defect that deformation is not enough.
8, the lower end sealing ring of the application is coated with the first copper sheet, reduces or prevents the little of high temperature and high pressure steam
The molecule Degradation to packing element, improves the long-lasting of packing element sealing.
Accompanying drawing explanation
Some describing the application the most by way of example, and not by way of limitation in detail are concrete
Embodiment.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 of sleeve pipe of one embodiment of the application
Put relation 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, wherein
Illustrate only a part of packing element, central canal and sleeve pipe；
Fig. 3 show the packing element shown in Fig. 2 be applied in the shoulder that produces after the first axial compressive force and central canal and
The position relationship schematic diagram of sleeve pipe, 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 one embodiment of the application；
Fig. 8 is the cross sectional representation of the sealing ring of one embodiment of the application；
Fig. 9 is the cross sectional representation of the sealing ring of one embodiment of the application；
Figure 10 is the cross sectional representation of the sealing ring of one embodiment of the application；
Figure 11 is the structural representation of the packing element of another embodiment of the application；
Figure 12 is the structural representation of the packing element of the application further embodiment；
Figure 13 is that the packing element shown in Figure 12 is by the structural representation after the first axial compressive force compression；
Figure 14 is the structural representation of the about collar that one embodiment of the application relates to；
Figure 15 is the structural representation comprising the about packing element of collar of one embodiment of the application, it illustrates
About collar before compression and the position relationship of packing element other parts；
Figure 16 be in Figure 15 packing element by the structural representation in the first axial compressive force compression process；
Figure 17 is that in Figure 15, packing element, by the structural representation after the first axial compressive force compression, it illustrates compression
After the position relationship of about collar and packing element other parts；
Figure 18 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-bottom, 107-shoulder；
108-matrix, 109-colloid, 111-the first copper sheet, copper sheet inside 111a-, copper sheet outside 111b-, 111c-
Opening, copper sheet on the upside of 111d-, copper sheet on the downside of 111e-, 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.Compression packer 200
It is connected on central canal 30 be placed in sleeve pipe 40.Compression packer 200 needs in the wellbore difference
Oil reservoir, water layer separates and bears certain pressure reduction, it is desirable to can descend pit shaft precalculated position, packing is tight,
Can have durability in down-hole again, can trip out smoothly when needing.
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 provides from top to bottom first axial compressive force F of (the i.e. first axial direction A) in the axial direction1,
Rigidity spacer ring 50 can also be removed in other embodiments and by packing element 10 being applied the first axial compressive force F1
Other parts replace.As in figure 2 it is shown, packing element 10 two ends are upper end 104 and bottom 106, in
Between portion 105 between upper end 104 and bottom 106.Upper end 104 is used for bearing in axial direction
The first axial compressive force F1, bottom 106 for bear in axial direction with the first axial compressive force F1On the contrary
The second axial compressive force F2.As a part for packing element 10, upper end 104, bottom 106 and centre
Portion 105 all should have elasticity.As to elastic a kind of explanation and the restriction of elastic size, when the first axle
To pressure F1When putting on upper end 104, upper end 104, pars intermedia 105 and bottom 106 are all in footpath
Deform upon to direction；When the second axial compressive force F2When putting on bottom 106, upper end 104, centre
Portion 105 and bottom 106 all deform upon in radial direction.In the embodiment depicted in figure 2, upper end 104
It is respectively provided with hypotenuse with bottom 106, this hypotenuse can also be not provided with 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 at figure
Isolate at shoulder 107 in 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 being positioned at center
103, this through hole 103 is limited by inner surface 102 and is formed, and outer surface 101 is positioned at and inner surface 102 phase
The outside of corresponding through hole 103.When the first axial compressive force F1Upper end is acted on along the first axial direction A
Portion 104 or the second axial compressive force F2Along the second axial direction B act on bottom 106 time, packing element 10 is whole
Body will be axially compressed and be radially expanded and (have identical containing with " deforming upon in radial direction "
Justice), promote outer surface 101 outwardly convex and inner surface 102 inwardly protruding, but in sequential usually
It it is outer surface 101 partly outwardly convex.Applying the first axial compressive force F1After, inner surface 102 and figure
Central canal 30 in 1 and Fig. 2 seals, and outer surface 101 seals with the sleeve pipe 40 in Fig. 1 and Fig. 2.One
As, the space between inner surface 102 and central canal 30 is less (the most bonded to each other), and outer surface
Gap between 101 and sleeve pipe 40 is relatively big, due to central canal 30 and sleeve pipe 40 respectively by inner surface 102 He
The maximum protruding size of outer surface 101 is defined, so causing the journey of 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 embodiment illustrated in fig. 4, the hardness of upper end 104 is more than the hardness of pars intermedia 105.More than Suo
The first axial compressive force F is born in end 1041Time, pars intermedia 105 is more than upper end in the deformation of radial direction
104 in the deformation of radial direction.
Owing to the hardness of upper end 104 is more than the hardness of pars intermedia 105, so in upper end 104 by the
One axial compressive force F1Time, upper end 104 is by this first axial compressive force F more1Pass to pars intermedia 105
And bottom 106 is not for the radial deformation of self.So can use the first less axial compressive force
F1Time can allow pars intermedia 105 and bottom 106 that radial deformation occurs, thus reach packing element 10 entirety
Seal.Inventor in experiments it is found that, if the hardness of upper end 104 is not more than the hardness of pars intermedia 105,
Then upper end 104 is by the first axial compressive force F1Time, it is more the radial deformation for self rather than passes
Pass 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
The hardness of end 104 is set greater than the hardness of pars intermedia 105, so at the first axle by formed objects
To pressure F1During effect, upper end 104 is less in the deformation of radial direction, it is accordingly required in particular to it is noted that phase
The shoulder 107 answering upper end 104, ground to be formed because of radial deformation is the least.Less shoulder 107 can have
Prevent packing element 10 from isolating to effect, reach to prevent the effect of packing element 10 seal failure.
Owing to the radial direction deformation of upper end 104 is less, it is likely that ground, now upper end 104 is in radial direction
Deformation not enough sleeve pipe 40 and central canal 30 are sealed, say, that now upper end 104 will no longer
Play sealing function, and be only the first axial compressive force F that will be subject to1Pass to pars intermedia 105 and bottom
106, this is a packing element 10 critically important difference with the packing element of prior art of the application.And,
Even if the radial direction deformation of upper end 104 is relatively big and sleeve pipe 40 and central canal 30 is sealed, now upper end 104
Sealing be the most only that seal this packing element 10 one supplements, no matter whether upper end 104 is played sealing and is made
By, upper end 104 hardness more than the setting of pars intermedia 105 hardness, it is therefore prevented that shoulder 107 excessive and lead
The packing element 10 caused 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
The hardness of end 104 is set greater than the hardness of pars intermedia 105, but so upper end 104 is at the first axle
To pressure F1May not contact with sleeve pipe 40 and not play sealing function under Zuo Yong.At this kind of special knot
Under structure, when bottom 106 is essentially identical with the hardness of pars intermedia 105, the sealing of the packing element of the application by
Bottom 106 and pars intermedia 105 provide；When bottom 106 is essentially identical with the hardness of upper end 104
Time, the sealing of the packing element of the application is provided by pars intermedia 105.So the packing element 10 of the application is with existing
The packing element of technology is entirely different in the structure sealed.
As a preferred embodiment, when the outer wall of upper end 104 and the inwall of sleeve pipe 40 are inconsistent, more
When being the inner wall sealing of outer wall and sleeve pipe 40 of upper end 104 excellently, the now bottom base of upper end 104
Being covered in the top of pars intermedia 105, upper end 104 and pars intermedia 105 are substantially not present footpath this homalographic
Difference on direction, downward compresses work it is thus possible to produce pars intermedia 105 and junction, upper end 104
With, prevent or reduce pars intermedia 105, with junction, upper end 104, shoulder occurs.
If in order to reach " to be by this first axial compressive force F more as above1Pass to pars intermedia 105
And bottom 106 is not for the radial deformation of self " and upper end 104 do not produce the effect of shoulder 107,
On-deformable metal derby, such as iron block can be used.If the diameter of metal derby is less, then connect with metal derby
The pars intermedia 105 touched can produce bigger shoulder 107, if being relatively large in diameter of metal derby, then considers sleeve pipe
The bending situation of 40, metal derby is difficult to slide into suitable position in sleeve pipe 40, and if in sleeve pipe 40
The metal derby entering foreign body the biggest is not easy to detach in sleeve pipe.On the other hand, lifting force is less then
Can not be detached in sleeve pipe 40 by metal derby, lifting force is relatively big then may damage sleeve pipe 40.Consider,
Upper end 104 used in this application has elasticity, but needs to be defined the elasticity of upper end 104, i.e.
The hardness of upper end 104 is more than the hardness of pars intermedia 105, and the diameter that such upper end 104 can be done is less,
Conveniently can be identical with the diameter of pars intermedia 105 at set in-pipe, such as upper end 104.Due to upper end
Portion 104 is harder, and the shoulder 107 himself not being easily formed shoulder 107 or formation is less, due in compression
Time upper end 104 deform upon in radial direction gradually extensional, reduce upper end 104 and sleeve pipe
Space between 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 bear the second axial compressive force F2Time, pars intermedia 105 exists more than bottom 106 in the deformation of radial direction
The deformation of radial direction.Based on same principle, such structure is prevented from bottom 106 and is bearing
One axial compressive force F1Or the second axial compressive force F2Time produce shoulder, and the feelings of shoulder can produced
Condition gets off to prevent bottom 106 from bearing the second axial compressive force F further2Shi Zaocheng shoulder becomes big, thus anti-
Only bottom 106 is isolated and is caused packing element 10 seal failure.
In another embodiment, upper end 104 is essentially identical with the hardness of bottom 106, say, that
The hardness of upper end 104 and bottom 106 is all higher than the hardness of pars intermedia 105, the most no matter by first
Axial compressive force F1Or the second axial compressive force F2Time, the deformation of pars intermedia 105 be all higher than upper end 104 with
Bottom 106.Such structure can make pars intermedia 105 quickly reach sealing state, and prevents upper end
There is shoulder or the shoulder preventing upper end 104 and bottom 106 from having produced in portion 104 and bottom 106
Sudden change is 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 part forms.As a example by Fig. 4, in the first axial direction A, the most from top to bottom
Direction on, three sealing rings 70 are respectively upper end sealing ring 71 the most above, intermediate seal ring 72 and
It is positioned at the lower end sealing ring 73 of lower section.Upper end sealing ring 71 serves as upper end 104, and intermediate seal ring 72 fills
When pars intermedia 105, lower end sealing ring 73 serves as bottom 106.In the embodiment shown in fig. 11, it is positioned at
The quantity of the intermediate seal ring 72 between upper end sealing ring 71 and lower end sealing ring 73 is three.At Figure 12
With in embodiment illustrated in fig. 13, the quantity of intermediate seal ring 72 is nine.In other embodiments, middle
The quantity of sealing ring 72 may be arranged as 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, by polyethers ether
The packing element 10 that ketone makes is harder, makes packing element 10 reach to set the first axial compressive force F of needs1Relatively greatly in other words
The first axial compressive force F in nominal amount1Lower rubber cylinder 10 deforms deficiency, causes packing element 10 cannot play sealing
Effect.When use softer colloid make packing element 10 time, this packing element 10 again can because of cannot sustain specified greatly
The first little axial compressive force F1And by conquassation or i.e. allow to sustain the first axial compressive force F1But subsequently
Bear 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 resistance to height being separated from each other
The cellosilk of temperature high pressure, such as graphite packing silk, glass fiber.Such structure to a certain extent can
Enough solve the problem that packing element 10 entirety is the softest.But, inventor is further discovered that, although the fiber of doping
Silk is each connected with colloid, but is substantially not connected between each cellosilk or connects less, so can only
The most limitedly increase the hardness of packing element 10.So, inventor devises following technical scheme: such as Fig. 5
Shown in, use cross one another plurality of fibers silk to form a matrix 108, and make colloid 109 be distributed in base
On the surface of body 108 and bonding each cellosilk forms sealing ring 70, the sealing ring 70 of this spline structure has
In the ductility of radial direction, in other words, sealing ring 70 is made due to the mutual tied up in knots of each cellosilk
Can diameter change not rupture (the most filametntary fracture), at sealing ring 70 within the specific limits
During diameter becomes greatly, cross one another cellosilk promotes, by offsetting a part, the first axle that the change of its diameter is big
To pressure F1, thus to make the diameter of sealing ring 70 increase to a certain degree, it is desirable to provide bigger
First axial compressive force F1.Especially, the cellosilk of each intersection is linked together by colloid 109 tightly, if
The diameter of sealing ring 70 to be made increases to a certain degree, it is necessary to the first bigger axial compressive force F1.Return
For receiving, each cellosilk intersects to form a resistance, and colloid 109 forms one again by bonding for each cellosilk
Resistance, under the effect of the two resistance, the more difficult compression of packing element 10 entirety, this is equivalent to packing element
10 is overall hardening.When the filametntary quantity in the certain volume of sealing ring 70 is roughly the same, inventor
Discovery can adjust cross one another filametntary quantity by changing the thickness of sealing ring, and then can adjust
The first required axial compressive force F1Size be i.e. applied to the size of setting force of packing element 10.Similarly, may be used
To adjust cross one another cellosilk by the filametntary quantity in the certain volume of increase sealing ring 70
Quantity, and then also can adjust the first required axial compressive force F1Size.It is upper that above two mode makes
End 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 and is coated on all tables of matrix 108
The colloid 109 in face, and the colloid 109 within not shown infiltration matrix 108.As to surface herein
Individual explanation, such as, when the cross section of matrix 108 is circular, the colloid 109 in Fig. 5 is positioned at matrix 108
Periphery on.In Fig. 5, matrix 108 is polymerized by the cellosilk of many high temperature high voltage resistants, such as fiber
Silk can be the material of other high temperature high voltage resistant such as glass fibre or carbon fiber.In one embodiment, respectively
Root cellosilk longitude and latitude is woven together and forms matrix 108, and in other is embodiment, each cellosilk also may be used
Matrix 108 is formed to be otherwise woven together.
By narration above, in the technical scheme of the application, this cellosilk is not necessarily needed to have
Flexible, this is owing to contraction and the expansion of packing element 10 are completed by colloid 109.Mentioned above, colloid
On 109 surfaces being distributed in each matrix 108 and internal and by bonding for each cellosilk.It is desired that glue
The bonding every cellosilk of body 109, and each cellosilk is bonded together across.
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, and can
Enough play sealing function, but through the shortest time (such as six hours) packing element in the environment of High Temperature High Pressure
10 or can seal failures, to lost efficacy packing element 10 research and analyse, find packing element be not the most because of
The rupturing and lost efficacy of shoulder 107, and fester and lost efficacy in the bottom 106 being because packing element 10.Through grinding
Studying carefully, the little molecule of this high temperature and high pressure steam being contained within downhole gas that festers can be to the glue of macromolecular material
Cylinder produces what degraded caused.After packing element 10 seals, the only lower surface of bottom 106 and downhole gas
Directly contact, thus cause 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
The lower surface (lower portion) of cladding sealing ring 70, medial surface (left-hand component), lateral surface (the right
Part).It can be seen that the first copper sheet 111 has opening 111c, opening 111c is positioned at sealing ring 70
Upper surface, and along the upper surface extension of sealing ring 70.In one embodiment, Fig. 5, opening are seen
111c can also be shrunk to a perforate along the upper surface of sealing ring 70.Opening 111c or the design of perforate,
It is to, in the case of High Temperature High Pressure, flow out for the gas of remaining in sealing ring 70, arrange on top
The gas that can also stop High Temperature High Pressure when this perforate is compressed by sealing ring flows into from this perforate.Real shown in Fig. 6
Executing in example, the second copper sheet 112 is covered by opening 111c, can also be used with the second copper sheet in other embodiments
112 cover this opening 111c.
It has to be considered that sealing ring 70 is annular, so being coated on its first outer copper sheet 111 also for ring
Shape, the first copper sheet 111 of annular easily produces in bending place and ruptures, so in the embodiment shown in fig. 7,
Upper surface, lower surface and the lateral surface of the first copper sheet 111 cladding sealing ring 70 and not cladding sealing ring 70
Medial surface (left-hand component).So, the first copper sheet 111 has only to once bend and can shape, and improves
The production efficiency of the first copper sheet 111.It is previously mentioned " 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 bigger ", so close
Seal ring 70 only needs the least inwardly protruding can seal with central canal 30, and needs the biggest outwardly convex
Just can seal with sleeve pipe 40, the face not the most being coated with copper sheet does not select to select at medial surface at lateral surface.
Seeing 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,
This design is in the case of medial surface is not coated with copper sheet, as much as possible the upper following table to sealing ring 70
Face produces protection, reduces the high temperature and high pressure steam Degradation to sealing ring 70.
In the embodiment shown in fig. 8, sealing ring 70 is coated with the 3rd copper sheet 113, and the 3rd copper sheet 113 wraps
Cover the lower surface of sealing ring 70, medial surface, lateral surface and upper surface, or the 3rd copper sheet 113 is coated with
The upper surface of sealing ring 70, lower surface and lateral surface and the medial surface of not cladding sealing ring 70.When first
When copper sheet 111 is also coated on the upper surface of lower end sealing ring 73, the shape of the first copper sheet and the 3rd copper sheet 113
Identical.
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 a part of lower surface of copper sheet 111a cladding sealing ring 70, whole medial surface (left-hand component) and
A part of upper surface.Outside a part of lower surface of copper sheet 111b 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 111b is at upper table
Face and lower surface all have the part of the superposition that overlaps.
In the embodiment shown in fig. 10, sealing ring 70 is coated with upside copper sheet 111d and downside copper sheet 111e,
Upside a part of medial surface of copper sheet 111d cladding sealing ring 70, whole upper surface (upper rim portion) and
A part of lateral surface.Downside a part of medial surface of copper sheet 111e cladding sealing ring 70, whole lower surface (under
Rim portion) and a part of lateral surface.And upside copper sheet 111d and downside copper sheet 111e at medial surface and
Lateral surface all has the part of the superposition that overlaps.In one embodiment, upside copper sheet 111d and downside copper
Skin 111e prevents the little molecule of high temperature and high pressure steam and directly contacting of sealing ring 70 in overlapping welding.
Fig. 9 and embodiment illustrated in fig. 10, also for the quantity of the bending place reducing by the first copper sheet 111, prevent
First copper sheet 111 easily produces in bending place and ruptures, and also improves the production efficiency of the first copper sheet 111.
Seeing Figure 11, packing element 10 has 71, lower end sealing ring 73 of a upper end sealing ring and three
Intermediate seal ring 72.In this embodiment, lower end sealing ring 73 can be coated with Fig. 6, Fig. 8 or Fig. 9
The copper sheet of structure like that.So, after the packing element 10 shown in Figure 11 seals, it is possible to prevent High Temperature High Pressure from steaming
The lower surface of lower end sealing ring 73 is caused corrosion and degraded by the little molecule of vapour.Further, due to lower end
Sealing ring 73 is only conflicted with central canal 30 and sleeve pipe 40, only plays slight sealing function, and lower end seals
It is likely that there are gap, so being also required to the lateral surface at lower end sealing ring 73 between ring 73 and sleeve pipe 40
Upper covering copper sheet.Owing to the upper surface of lower end sealing ring 73 is by the lower surface of the intermediate seal ring 72 of bottom
Compress, completely cut off directly contacting of the little molecule with high temperature and high pressure steam, in terms of this from the point of view of, lower end is close
The upper surface of seal ring 73 is not required to cover copper sheet.If but the upper surface of lower end sealing ring 73 does not cover copper
Skin, then the opening part of copper sheet is necessarily located on the lateral surface of lower end sealing ring 73, is so pressed at packing element 10
Contracting and during radial deformation, the opening of copper sheet can be to lower end sealing ring 73 self or the centre of bottom
Sealing ring 72 produces and isolates, and 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, opening 111c is by the second copper sheet
112 cover.Inner side copper sheet 111a and outside copper sheet 111b in Fig. 9 are " u "-shaped structure, in peace
First inner side copper sheet 111a can be set in sealing ring 70 from medial surface, from lateral surface by copper outside during dress
Skin 111b is set on sealing ring 70 and sections inner side copper sheet 111a, and such structure can be by copper sheet side
Just it is installed on sealing ring 70, improves installation effectiveness.For upper end sealing ring 71, upper end is close
Structure after seal ring 71 combines with copper sheet can be for the structure shown in Fig. 6, Fig. 8 or Fig. 9.When for Fig. 6 institute
During the structure shown, need that the first copper sheet 111 and the second copper sheet 112 are all revolved turnback and use, now
Opening 111c is pressed against by the upper surface of intermediate seal ring 72 topmost, and such structure is prevented from
End sealing ring 71 opening 111c when by the first axial compressive force F1 opens.By to structure shown in Fig. 6
It is 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 by
Adjacent sealing ring is pressed against, and prevents opening when by the first axial compressive force F1 or the second axial compressive force F2
111c opens.Structure in Fig. 8, after can being coated with sealing ring 70 by using copper sheet again at gap
Welding realizes.Structure in Fig. 9, why by inner side copper sheet 111a and the overlap of outside copper sheet 111b
Part is arranged at sealing ring 70 upper and lower surface, and reason is, when inner side copper sheet 111a and copper outside
When the lap of skin 111b is arranged at medial surface or the lateral surface of sealing ring 70, when to the first axial compressive force
In F1 or the second axial compressive force F2 compression process, adjacent sealing ring may be produced and isolate effect, and
And lap is arranged at the upper and lower surface of sealing ring 70, adjacent sealing ring can be to lap
Extruding, has completely cut off directly contacting of the little molecule with high temperature and high pressure steam further.Inner side copper sheet in Fig. 9
The structure shown in Fig. 8 can be formed after the overlapping welding of 111a and outside copper sheet 111b.
As a example by Figure 11, the structure of lower end sealing ring 71 and copper sheet as shown in Figure 6, when upper end sealing ring 71
Bear the first axial compressive force F1Time, the first axial compressive force F1Going down and cause lower end sealing ring 73 radially
Direction deforms upon, the first copper sheet 111 being so distributed on the medial surface of lower end sealing ring 73 can with in
Heart pipe 30 is conflicted, and the first copper sheet 111 being distributed on the outer surface of lower end sealing ring 73 can be with sleeve pipe 40
Conflicting, this can realize by being configured to the thickness of the first copper sheet 111, and the most not coated copper
The sealing ring 70 of skin seals respectively with central canal 30 and sleeve pipe 40.In one embodiment, the first copper sheet
The thickness of 111 is 1mm.When upper end sealing ring 71 and copper sheet structure as shown in Figure 8, lower end sealing ring
71 bear the second axial compressive force F2Time, it is coated in the shoulder formed by the upper surface of upper end sealing ring 71
3rd copper sheet 113 does not ruptures.This can by the thickness of the 3rd copper sheet 113 is configured to realize,
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 the sealing of the sealing of sleeve pipe 40, i.e. metal and metal, then need the biggest pressure.In the application
Embodiment in, including a sealing ring not being coated with copper sheet, this sealing ring is normally at centre, such as
It is positioned at the intermediate seal ring 72 in the middle of three intermediate seal rings 72 in the embodiment shown in fig. 11 not to be coated with
Copper sheet, arbitrary intermediate seal ring 72 is not coated with copper sheet.It is not coated with copper sheet
Sealing ring 70 plays main sealing function, and lower end sealing ring 71 stops most high temperature and high pressure steam,
The intermediate seal ring 72 of bottom stops a part of high temperature and high pressure steam further, so arrives bottom
The high temperature and high pressure steam of intermediate seal ring 72 the most considerably less, be effectively reduced high temperature and high pressure steam pair
The corrosion of middle intermediate seal ring 72 and degraded, extend the sealing persistent period of packing element 10.It is not coated with
The quantity of the intermediate seal ring 72 of copper sheet can also be arranged as required to two or more.Upper end sealing ring 71 wraps
When being covered with copper sheet, mainly prevent or shoulder 107 with copper sheet, refer to above " reduce or prevent shoulder
The structure design of 107 ".
Seeing Figure 12, two ends 104,105 of packing element 10 can be levelling by colloid 109.Each close
Seal ring 70 extends in circular and along packing element 10 axial direction on the whole.Between adjacent base 108
The thickness phase of colloid 109 is meanwhile, it is capable to make the hardness in equal area of packing element 10 basic as much as possible
Identical, prevent packing element 10 unbalance stress from locally caving in.But, when as shown in figure 18, working as glue
When cylinder 10 is syllogic, each section of packing element can be all a single packing element, the glue shown in such Figure 18
Cylinder 10 is equivalent to be spliced in the axial direction by three separate packing elements.Figure 18 is only with packing element
10 be syllogic as an example, packing element can also have other section in other embodiments, such as two sections or
Five sections.It should be noted that in an embodiment of the application, rigidity spacer ring 50 can also be used in
Between each sealing ring shown in Figure 11, inventor finds, when the copper sheet of sealing ring 70 and cladding has part convex
Go out or time part is harder, the deformation of the sealing ring that impact that can be serious is inconsistent with it.And rigidity spacer ring 50
Equably its upper and lower surfaces contacted can be applied pressure, prevent sealing ring 70 uneven because of its rigidity
And surface or lower surface become uneven thereon when by axial compressive force, and prevent sealing ring 70
Upper surface or the lower surface of the sealing ring 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 is axial
Pressure F2And during radial direction expansion (inwardly or outwardly), cellosilk will limit this expansion, thus in entirety
The structural rigidity of upper increase packing element 10, increases the comprcssive strength of packing element 10.Especially, matrix 108 is circle
Time ring-type, when sealing ring 70 is by the first axial compressive force F1Or second axial compressive force F2Time, each sealing ring
70 stress ratios are more uniform, it is therefore prevented that the partial collapse of packing element 10.Further, in an embodiment of the application
In, the thickness of the adjacent colloid 109 between matrix 108 is identical, thus can guarantee that by first axial
Pressure F1Or second axial compressive force F2Power is handed on by the sealing ring 70 of effect equably, it is therefore prevented that seal
The each several part unbalance stress of ring 70 and by conquassation.
Seeing Figure 12, each sealing ring 70 is each other by the bonding and bonding each sealing ring 70 of colloid 109
The length sum of axial direction is equal to the length of through hole 103, thus forms multiple seal section.Matrix in Fig. 5
The thickness of 108 is 1.8cm-2.5cm, and quantity can be chosen as 2-12.Have in the embodiment shown in fig. 11
Having 5 sealing rings 70, the quantity of matrix 108 is also 5.Filametntary diameter is chosen as 7-30 μm,
Thus can have the cellosilk of substantial amounts on a sealing ring 70, packing element 10 can be improved greatly
Hardness.According to the test of inventor, the thickness of matrix 108 is to be advisable less than 2cm.This is because, send out
A person of good sense finds, needs to penetrate into the glue forming colloid 109 to form sealing ring 70 in matrix 108, but with
The permeating speed increasing glue matrix 108 thickness will be the most slack-off.Especially when the thickness of matrix 108
The speed penetrated into more than glue after 2.5cm will be the slowest.So, in one embodiment, each matrix 108
Thickness be 2cm, can also be 1.8cm or 2.5cm in other embodiments.
See Figure 12 and Figure 13, Figure 12 and Fig. 1 entirety to show by packing element during the first axial compressive force F1
The deformation process of 10.As a example by packing element 10 shown in Figure 12, between adjacent sealing ring 70, there is colloid 109,
It is not affected by the first axial compressive force F at packing element 101Time, each sealing ring 70 all radial direction with packing element 10 become
Angle β, β is 10 ° of angles in fig. 12.In other embodiments, 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 the of nominal amount
One axial compressive force F1And cause packing element 10 when deforming deficiency and sealing function cannot be played, sealing ring 70 first from
Become angle β to become the radial direction level of sealing ring 70 and packing element 10 with the radial direction of packing element 10,
And then carrying out projection radially again, such structure can improve the deformation extent of packing element 10.In Figure 11 institute
Show in embodiment, be not affected by the first axial compressive force F at packing element 101Time, each sealing ring 70 all with packing element 10
Radial direction parallel.As it is shown in figure 1, the packing element 10 shown in Figure 11 and Figure 12 is axial by first
Pressure 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), generally formed by relatively soft thread braiding, usual sectional area be square or rectangular,
Circular.In one embodiment, the cross section of matrix 108 is tetragon, such as square.Real at other
Executing in example, 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 14, Figure 15, Figure 16 and Figure 17, as shown in figure 14, about collar 20 entirety is enlarging shape,
It has flared end 22 and necking end 21.Seeing Figure 15, the about flared end 22 of collar 20 is set in upper end
In portion 104 and bottom 106, in other embodiments, flared end 22 can also only be set in upper end
On one of 104 and bottom 106, it has mainly depended on that this end prevents in pressure the need of restrained deformation
Compression process deform excessive.In Figure 15-Figure 17, the about quantity of collar 20 is two, and one of them is about
The flared end 22 of collar 20 is set in upper end 104, and the flared end 22 of another about collar 20 is set in
On bottom 106.Seeing Figure 16, the about necking end 21 of collar 20 is sheathed upper away from being flared end 22
End 104 or bottom 106 are used for bearing the pressure from axial.In Figure 15 and Figure 16, it is only
The needs of clear in structure and show schematically about collar 20 and the position relationship of packing element 10 other parts, real
On border, about collar 20 is to combine closely in the end with packing element 10, contacts with each other the most between the two.From figure
17 it can be seen that bearing the first axial compressive force F1After, about collar 20 entirety is cylindrically.Further, about
The flared end 22 of collar 20 is essentially identical with the diameter of necking end 21, and both diameters and sleeve pipe 40
Internal diameter identical, now the outer surface 101 of packing element 10 seals with sleeve pipe 40, and the interior table of packing element 10
Face 102 seals with central canal 30.
The about effect of collar 20 is the most extremely important, and this is the equal axle of sealing ring 70 due to the application
To setting, and also it is from axial pressure to sealing ring 70 generation effect.So, it is however very well possible to ground,
The upper end sealing ring 71 and the lower end sealing ring 72 that are positioned at packing element 10 two ends can be because of the first axial compressive forces F1Or the
Two axial compressive forces F2Effect and contact in advance with central canal 30 and sleeve pipe 40 in radial direction, cause centre
Sealing ring 72 cannot produce radial protrusion because stress is too small.By about collar 20 at the constraint of end, energy
Enough first make intermediate seal ring 72 the most protruding, when middle sealing ring 72 is limited by central canal 30 and sleeve pipe 40
After making, there is radial protrusion band moving constraint set 20 product in upper end sealing ring 71 and lower end sealing ring 72 again
The such deformation of raw Figure 15, Figure 16 and Figure 17.Or first make intermediate seal ring 72 the most protruding, and
In the process, also there is radial protrusion band moving constraint set 20 in upper end sealing ring 71 and lower end sealing ring 72
Produce the such deformation of Figure 15, Figure 16 and Figure 17.Above two mode is for preventing packing element 10
The specialized designs that two ends are protruding in advance and do.The design harder with upper end 104 when about collar 20 goes out jointly
Now when packing element 10, it is possible to make pars intermedia 105 carry out preferentially deforming of radial direction without error.
In Figure 15 and embodiment illustrated in fig. 16, the edge of upper end 104 and bottom 106 is through chamfering
Process, adapt with about collar 20, say, that be flared the sheathed upper ends of end 22 104 with under
Match with flared end 22 in reducing shape in end 106.This design of packing element 10 can increase packing element 10
The contact area of end and about collar 20, and the end of this kind of design and the first axial compressive force F1Between
There is angle, thus need the first bigger axial compressive force F1Packing element 10 could be compressed and produce nominal amount
Deformation, a certain degree of setting force increasing needs.As shown in figure 17, when applying the first axial compressive force
F1After, packing element 10 inwardly or outwardly will extend to radial direction, due to the constraint of sleeve pipe 40, the most about
Collar 20 carries out expansion radially, the most about flared end of collar 20 in the range of limiting at sleeve pipe 40
22 by essentially identical with the diameter of packing element 10, and the most essentially identical with the internal diameter of sleeve pipe 40.Such as Figure 16 institute
Show, in compression process, projection can be formed, Figure 16 schematically illustrates a projection 60, in reality
During the compression of border, outer surface 101 entirety of packing element 10 expands outwardly as projection, and simply the application is at one
The protruding speed at the middle part of packing element 10 is deliberately faster than its two ends by the design of about collar 20 by embodiment
Protruding speed.Very important, if about collar 20 is chosen as the material of difficult deformation, then such as Figure 16
As Suo Shi, when continuing compression, protruding 60 will contact with the top edge of about collar 20, and the most right
Protruding 60 cause shearing, have impact on the sealing of packing element 10.The most about collar is chosen as copper sheathing, and
And determine the maximum gauge of flared end 22 less than 2mm in upper thickness limit, flared end 22 refers to such as scheme
Whole trumpet-shaped edge in 14, rather than that end face of the rightmost side in Figure 14.Such restriction can make
About must will not cause damage to protruding 60 by collar 20, 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 17 by sleeve pipe 40.Based on same
The reason of sample, the about collar 20 of the perpendicular type as can not using as shown in Figure 17 before compression,
Otherwise during compression, about collar 20 also can be to gradually protruding outer surface 101 generation shearing to glue
Cylinder 10 produces and isolates.In this application, about collar 20 is bell mouth shape, during compression, and constraint
Set 20 is that a kind of face contacts rather than linear contact lay with protruding 60, greatly reduces the probability of protruding 60 damages.
And as shown in figure 14, 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 being designed to makes wedging ring 20 in an orderly manner, gradually
Deformation, will not be by the first axial compressive force F1Suddenly conquassation.The application selects about collar 20 to be the another of copper sheathing
One major reason is, so when being tripped out from down-hole by packer 200, copper sheathing is easily deformed, will not
It is stuck between sleeve pipe 40.Based on same reason, it is also possible to select same yielding silver as about collar.
The application also provides for a kind of packer, and this packer has the packing element that one of technique scheme is limited
10。
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 and the most detailed illustrate and describing the application's
Multiple exemplary embodiments, but, in the case of without departing from the application spirit and scope, still can be according to this
Application disclosure directly determines or derives other variations or modifications of many meeting the application principle.Cause
This, scope of the present application is it is understood that and regard as covering other variations or modifications all these.
Claims (10)
1. a packing element (10), has and is positioned at the through hole (103) at center, is positioned at described through hole (103)
Inner surface (102) outer surface (101) corresponding with described inner surface (102) at place, respectively position
In the upper end (104) at described packing element (10) two ends and bottom (106) and be positioned at described upper end
(104) pars intermedia (105) and between described bottom (106), described upper end (104) are used for
Bearing the first axial compressive force in axial direction, described bottom (106) are used for bearing along described axial side
To second axial compressive force contrary with described first axial compressive force；When described first axial compressive force puts on institute
When stating upper end (104), described upper end (104), pars intermedia (105) and bottom (106) are equal
Deform upon in radial direction；When described second axial compressive force puts on described bottom (106), institute
State upper end (104), pars intermedia (105) and bottom (106) all in described radial direction generation shape
Become, it is characterised in that
Described packing element (10) by one be positioned at the upper end sealing ring (71) of upper end, one be positioned under lower end
End sealing ring (73), more than one it is positioned at described upper end sealing ring (71) and described lower end sealing ring (73)
Between intermediate seal ring (72) described axial direction arrangement form, described upper end sealing ring (71) is filled
When described upper end (104), described bottom (106) is served as in described lower end sealing ring (73), 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)
It is coated with upper surface, lower surface and the lateral surface of described lower end sealing ring (73) and not to be coated with described lower end close
The medial surface of seal ring (73)；The thickness of described first copper sheet (111) is set to, when described upper end (104)
When bearing described first axial compressive force, described lower end sealing ring (73) deform upon in described radial direction and
Make the first copper sheet (111) energy and the sleeve pipe being distributed on the described outer surface of described lower end sealing ring (73)
(40) conflict.
Packing element the most according to claim 1 (10), it is characterised in that
The edge of opening of described first copper sheet (111) is concordant with the medial surface of described lower end sealing ring (73).
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), described 3rd copper sheet (113)
It is coated with upper surface, lower surface and the lateral surface of described upper end sealing ring (71) and not to be coated with described upper end close
The medial surface of seal ring (71)；The thickness of described 3rd copper sheet (113) is set to, when described bottom (106)
When bearing described second axial compressive force, it is coated on and is formed by the described upper surface of described upper end sealing ring (71)
Shoulder on described 3rd copper sheet (113) do not rupture.
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
Copper sheet, middle described intermediate seal ring (72) all it is coated with described intermediate seal ring (72) topmost
It 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 institute
Stating upper end sealing ring (71) when bearing described first axial compressive force, described intermediate seal ring (72) is radially
The deformation in direction is more than described upper end sealing ring (71) deformation in radial direction；
The hardness of described lower end sealing ring (73) is more than the hardness of described intermediate seal ring (72), so that institute
Stating lower end sealing ring (73) when bearing described second axial compressive force, described intermediate seal ring (72) is radially
The deformation in direction is more than described lower end sealing ring (73) deformation in 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 institute
Stating upper end sealing ring (71) when bearing described first axial compressive force, described intermediate seal ring (72) is radially
The deformation in direction is more than described upper end sealing ring (71) and described lower end sealing ring (73) in radial direction
Deformation, and when described second axial compressive force is born in described lower end sealing ring (73), described intermediate seal ring
(72) deformation in radial direction is more than described upper end sealing ring (71) and described lower end sealing ring (73)
Deformation in 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), described
Matrix (108) is made up of the plurality of fibers silk of cross one another high temperature high voltage resistant, and described colloid (109) glues
Connect each described cellosilk, and described colloid (109) be distributed on the surface of each described matrix (108) with
The multiple described sealing ring (70) causing to arrange along described axial direction inside and outside formed respectively described in
Surface (102) and outer surface (101).
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 (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610526115.3A CN106014329A (en) | 2016-07-06 | 2016-07-06 | Rubber sleeve without copper sheet coating inner side face of sealing ring at lower end, packer and bridge plug |
| CN201611129679.XA CN106481306B (en) | 2016-07-06 | 2016-12-09 | Rubber sleeve with lower end sealing ring inner side surface not coated with copper sheet, packer and bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610526115.3A CN106014329A (en) | 2016-07-06 | 2016-07-06 | Rubber sleeve without copper sheet coating inner side face of sealing ring at lower end, packer and bridge plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106014329A true CN106014329A (en) | 2016-10-12 |
Family
ID=57107489
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610526115.3A Pending CN106014329A (en) | 2016-07-06 | 2016-07-06 | Rubber sleeve without copper sheet coating inner side face of sealing ring at lower end, packer and bridge plug |
| CN201611129679.XA Active CN106481306B (en) | 2016-07-06 | 2016-12-09 | Rubber sleeve with lower end sealing ring inner side surface not coated with copper sheet, packer and bridge plug |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611129679.XA Active CN106481306B (en) | 2016-07-06 | 2016-12-09 | Rubber sleeve with lower end sealing ring inner side surface not coated with copper sheet, packer and bridge plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN106014329A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958432A (en) * | 2017-05-25 | 2017-07-18 | 隆学武 | Increase full bag enhancing set, processing method, cartridge and the packer of laminating degree |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112611640B (en) * | 2020-10-22 | 2022-05-17 | 西南石油大学 | Device and method for testing high-temperature compression performance of variable-specification multi-size rubber cylinder |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6962206B2 (en) * | 2003-05-15 | 2005-11-08 | Weatherford/Lamb, Inc. | Packer with metal sealing element |
| CN2844418Y (en) * | 2005-11-25 | 2006-12-06 | 张立臣 | Steel umbrella formula sealer |
| CN102505927A (en) * | 2011-12-16 | 2012-06-20 | 中国石油天然气股份有限公司 | Metal wrapped-type high-temperature sealing structure and manufacturing method thereof |
| CN203685115U (en) * | 2013-10-17 | 2014-07-02 | 北京一龙恒业石油工程技术有限公司 | Rubber tube protruding prevention ring for permanent packer |
| CN204312018U (en) * | 2014-10-29 | 2015-05-06 | 中国石油天然气股份有限公司 | Packing element guard member and protection structure of rubber drum of packer |
| CN204371211U (en) * | 2015-01-12 | 2015-06-03 | 中国石油大学(华东) | A kind of packer sealing structure based on the sealing of metal-rubber cylinder |
| CN105156063B (en) * | 2015-09-23 | 2017-10-31 | 天鼎联创密封技术（北京）有限公司 | Skeleton seal and packer |
| CN105298434B (en) * | 2015-11-23 | 2017-12-22 | 天鼎联创密封技术（北京）有限公司 | Packing element, compression packer and the encapsulating method of high temperature steam |
| CN205349290U (en) * | 2015-11-23 | 2016-06-29 | 天鼎联创密封技术（北京）有限公司 | Resistant high -temperature steam's packing element and compression packer |
| CN105545244B (en) * | 2016-01-21 | 2019-04-02 | 天鼎联创密封技术（北京）有限公司 | The packing element and compression packer of carbon fiber oxidization fiber |
| CN206280041U (en) * | 2016-07-06 | 2017-06-27 | 天鼎联创密封技术（北京）有限公司 | Lower end sealing ring medial surface does not coat packing element, packer and the bridging plug of copper sheet |
-
2016
- 2016-07-06 CN CN201610526115.3A patent/CN106014329A/en active Pending
- 2016-12-09 CN CN201611129679.XA patent/CN106481306B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958432A (en) * | 2017-05-25 | 2017-07-18 | 隆学武 | Increase full bag enhancing set, processing method, cartridge and the packer of laminating degree |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106481306A (en) | 2017-03-08 |
| CN106481306B (en) | 2023-03-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105888602A (en) | Rubber sleeve with lower end seal ring covered with opened copper sheet, packer and bridge plug | |
| CN105863553A (en) | Packer element with lower end sealing ring wrapped by two copper sheets, packer and bridge plug | |
| CN106121582A (en) | Two ends are the packing element of hard sealing ring, packer and bridging plug | |
| CN105863552A (en) | Rubber barrel with harder upper end part as well as packer and bridge plug | |
| CN105781482A (en) | Rubber barrel with relatively hard upper and lower end parts, packer and bridge plug | |
| CN106089146A (en) | Packing element, packer and bridging plug including tinsel sealing ring | |
| CN106014329A (en) | Rubber sleeve without copper sheet coating inner side face of sealing ring at lower end, packer and bridge plug | |
| CN105927183A (en) | Rubber cylinder with lower sealing ring coated with upper and lower copper skins, packer and bridge plug | |
| CN205714083U (en) | Lower end sealing ring is coated with the packing element of two panels copper sheet, packer and bridging plug | |
| CN205778712U (en) | Packing element, packer and the bridging plug that upper and lower end parts is harder | |
| CN206280043U (en) | Packing element, packer and the bridging plug of coated graphite layer | |
| CN206071528U (en) | Two ends are packing element, packer and the bridging plug of hard sealing ring | |
| CN205714082U (en) | The lower end sealing ring cladding packing element of copper sheet, packer and bridging plug | |
| CN205714081U (en) | Lower end sealing ring is coated with the packing element of opening copper sheet, packer and bridging plug | |
| CN206448794U (en) | Packing element, packer and the bridging plug of two layers of copper sheet above and below the sealing ring cladding of lower end | |
| CN106481305A (en) | Composite structure, packing element manufacture method, packing element, packer and bridging plug | |
| CN206280041U (en) | Lower end sealing ring medial surface does not coat packing element, packer and the bridging plug of copper sheet | |
| CN106050184B (en) | Packing element, packer and the bridge plug of lower end sealing ring cladding copper sheet | |
| CN106522872A (en) | Rubber barrel with metal sealing rings, packer and bridge plug | |
| CN105781480A (en) | Rubber cylinder with inner cores provided with spiral packing, packer and bridge plug | |
| CN205714080U (en) | Packing element, packer and the bridging plug that upper end is harder | |
| CN206448795U (en) | Packing element, packer and bridging plug with metallic packing ring | |
| CN206280042U (en) | Packing element, packer and bridging plug that upper and lower ends are relatively large in diameter | |
| CN206439023U (en) | Packing element, packer and bridging plug with disc spring | |
| CN106639967A (en) | Rubber sleeve coated with graphite layer, packer and bridge plug |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161012 |