CN205422631U - Packing element with cylindric inner core - Google Patents
Packing element with cylindric inner core Download PDFInfo
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- CN205422631U CN205422631U CN201620243432.XU CN201620243432U CN205422631U CN 205422631 U CN205422631 U CN 205422631U CN 201620243432 U CN201620243432 U CN 201620243432U CN 205422631 U CN205422631 U CN 205422631U
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- packing element
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Abstract
The utility model relates to a sealing technique field of oil development industry especially relates to one kind and can bear the highly compressed packing element with cylindric inner core of high temperature. The packing element has the seal, and the seal has through -hole, internal surface, surface and first end and the second end that is located the center, and the packing element includes a plurality of inner cores, and each inner core all is cylindricly on the whole and extends along the axial direction of packing element, and each inner core all has intercrossing's high temperature and high pressure's many cellosilks, the colloid distribute in each inner core on the surface with inside and bond each cellosilk, the diameter diverse of each inner core on the radial side of a packing element ascending cross -section. Because the cladding has an inner core in the colloid, the inner core has intercrossing's a cellosilk, the colloid distribute in each inner core on the surface with inside and bond each cellosilk. When the packing element receives axial pressure and expands, the cellosilk will restrict this inflation to in the structure hardness that increases the packing element on the whole, the compressive strength of increase packing element.
Description
Technical field
This utility model relates to the technical field of sealing technology of oil exploitation industry, particularly relates to a kind of packing element with cylindric inner core that can bear High Temperature High Pressure.
Background technology
Packing element is the sealing member for field of petroleum exploitation, and packing element typically uses rubber type of material to make, therefore referred to as packing element.Should be noted that, packing element is only the technical term that the interior agreement of a kind of industry becomes social custom, for representing the functional parts used during oil exploitation or the parts coordinating packer to use as packer, and the material referring not only to packing element needs to be made by rubber.When packing element bears certain pressure to promote its deformation for sealing, 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, when packing element is by high-temperature steam effect, packing element is more affected by the effect of High Temperature High Pressure and lost efficacy and cause losing recovery capability.
Inventor finds, variant owing to constituting the soft or hard (deformation extent of colloid under certain pressure) of colloid of packing element, when using softer colloid to make packing element, this packing element can because cannot sustain the axial compressive force of nominal amount and by conquassation.
Utility model content
The purpose of this utility model is the packing element providing a kind of new structure to design, and increases the comprcssive strength of packing element.
This utility model provides a kind of packing element, there is seal, described seal has and is positioned at the through hole at center, is positioned at the inner surface of the through hole outer surface corresponding with described inner surface and lays respectively at first end and the second end at described packing element two ends, described packing element includes multiple inner core, each described inner core the most cylindrically and along described packing element axial direction extend, each described inner core is respectively provided with the plurality of fibers silk of cross one another high temperature high voltage resistant, and colloid is distributed on the surface of each described inner core and internal and by bonding for each described cellosilk；
Wherein, the diameter of each described inner core in the radial direction cross section of described packing element is different.
Preferably, on described axial direction, quantity is the length length equal to described through hole of the described inner core of.
Preferably, on described axial direction, quantity is that the described inner core of at least two is mutually bonded and the length sum of bonding each described inner core is equal to the length of described through hole.
Preferably, the thickness of described inner core is 1.8mm-2.5mm.
Preferably, the quantity of described inner core is 10-15.
Preferably, described packing element is additionally included on described axial direction the about collar extended, described about collar is overall in enlarging shape, the flared end of described about collar is set on described first end or described the second end, and the necking end of described about collar extends through by the sheathed described first end of described flared end or described the second end for bearing axial compressive force.
Preferably, after bearing described axial compressive force, described about collar entirety is cylindrically.
Preferably, described necking end has inside bevelling.
Preferably, it is that reducing shape matches with described flared end by the sheathed described first end of described flared end or described the second end.
Preferably, described about collar is copper, and the maximum gauge of described flared end 22 is less than or equal to 2mm.
Preferably, the quantity of described about collar is two, and the flared end of one of them described about collar is set in described first end, and the flared end of another described about collar is set on described the second end.
The technique scheme provided according to this utility model, owing to being coated with inner core in colloid, inner core has cross one another cellosilk, and colloid is distributed on the surface of each inner core and internal and by bonding for each cellosilk.When packing element is expanded by axial compressive force, cellosilk will limit this expansion, thus increases the structural rigidity of packing element on the whole, increases the comprcssive strength of packing element.
Accompanying drawing explanation
Describe specific embodiments more of the present utility model 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 packing element and central canal and the position relationship schematic diagram of sleeve pipe of one embodiment of this utility model；
Fig. 2 is the structural representation of the packing element according to one embodiment of this utility model；
Fig. 3 is the structural representation of the about collar according to one embodiment of this utility model；
Fig. 4 is the structural representation comprising the about packing element of collar according to one embodiment of this utility model, it illustrates the position relationship of the about collar before compression and seal；
About collar when Fig. 5 is to compress in Fig. 4 and the structural representation of seal, it illustrates the projection formed in sealant surface；
Fig. 6 is the structural representation of the about collar after compressing in Fig. 4 and seal；
Fig. 7 is the part-structure schematic diagram of the packing element according to another embodiment of this utility model
Fig. 8 is the schematic diagram that in Fig. 7, internal layer inner core is combined with colloid；
Fig. 9 is the structural representation of the packing element of the syllogic according to one embodiment of this utility model.
Reference in figure is as follows:
10-packing element, 101-outer surface, 102-inner surface, 103-through hole, 104-first end, 105-the second end；
106-internal layer inner core, 107-middle level inner core, 108-outer layer inner core, 109-colloid；
20-about collar, 21-necking end, 22-flared end；
30-central canal；
40-sleeve pipe；
50-seal；
60-is protruding；
200-compression packer；
A-axial direction；
F-axial compressive force.
Detailed description of the invention
Packer is a kind of key tool that oil field well recovers the oil, it is widely used in the several work purpose needs such as oil field dispensing, separate zone stimulation, oil production by layer, mechanical pipe water blockoff, packer needs to carry out the packing of annular space, and the core component realizing annular space packing is packing element.Packing element is as the core component of packer, and its quality directly affects using effect and the service life of packer, plays conclusive effect in packer.Inventor finds, variant owing to constituting the soft or hard of the colloid of packing element, such as, when being colloid when using polyetheretherketonematerials materials, owing to polyether-ether-ketone is harder, reaches pressure when setting bigger.When use softer colloid make packing element time, this packing element can because cannot sustain the axial compressive force of nominal amount and by conquassation.
Compression packer 200 as shown in Figure 1 has the packing element 10 of the application, and described packing element 10 is the most cylindric.Compression packer 200 needs in the wellbore different oil reservoirs, water layer are separated and bear certain pressure reduction, it is desirable to can descend pit shaft precalculated position, and packing is tight, can have durability in down-hole again, can trip out smoothly when needing.
As shown in Figure 2, in an embodiment of the application, a kind of packing element 10 is provided, packing element 10 has seal 50, seal 50 has the through hole 103 being positioned at center, this through hole 103 is formed by the inner surface 102 of packing element 10, and outer surface 101 is positioned at the outside of the through hole 103 corresponding with inner surface 102, and packing element 10 two ends are first end 104 and the second end 105.When axial compressive force F of axial direction A acts on first end 104 and the second end 105, packing element 10 entirety will be compressed, promote outer surface 101 outwardly convex and inner surface 102 inwardly protruding, so that inner surface 102 seals with the central canal 30 in Fig. 1, and outer surface 101 is made to seal with the sleeve pipe 40 in Fig. 1.See Fig. 4, Fig. 5 and Fig. 6, usually, space between inner surface 102 and central canal 30 is less, and gap between outer surface 101 and sleeve pipe 40 is bigger, due to the restriction effect of central canal 30 and sleeve pipe 40, so causing the degree of outer surface 101 outwardly convex more than the inwardly protruded degree of inner surface 102.
Inventor is during solution colloid is softer, and the cellosilk of multiple high temperature high voltage resistant being separated from each other that once adulterated in colloid, this structure can solve the problem that the problem that packing element 10 entirety is the softest to a certain extent.But, inventor is further discovered that, although the cellosilk of doping is connected with colloid, but is substantially not connected between each cellosilk or connects less, so the hardness of packing element 10 can only limitedly be increased.So, inventor devises following technical scheme: use cross one another plurality of fibers silk to form an inner core, the inner core of this spline structure has certain ductility in radial direction, in other words, inner core can not rupture within the specific limits in diameter change, and during inner core diameter becomes greatly, cross one another cellosilk promotes, by offsetting a part, axial compressive force F that the change of its diameter is big, thus to make the diameter of inner core increase to a certain degree, it is desirable to provide bigger axial compressive force F.Especially, colloid 109 is distributed on the surface of each described inner core and internal and by design bonding for each cellosilk, cause colloid 109 to be linked together tightly by the cellosilk of each intersection, to make the diameter of inner core increase to a certain degree, it is desirable to provide axial compressive force F the biggest.It is to say, glue is cured as colloid, one resistance of bonding for each cellosilk formation, each cellosilk intersection are formed again a resistance by colloid, and under the effect of the two resistance, the more difficult compression of packing element 10 entirety, it is hardening that this shows as packing element 10.Inventor through overtesting, finds can probably adjust cross one another filametntary quantity by changing the thickness of inner core, and then the size of the size setting force in other words of axial compressive force F needed for adjusting.
In embodiment as shown in Figure 7, packing element 10 includes internal layer inner core 106, middle level inner core 107 and 108 3 inner cores of outer layer inner core, Fig. 7 only schematically illustrates packing element 10 and has the part in 12 inner cores, usually, the quantity of described inner core is set to 10-15, the quantity of inner core can be chosen as 10 the most in one embodiment, in another embodiment the quantity of inner core is chosen as 15.It is significant to note that, each described inner core is respectively provided with the plurality of fibers silk (not shown) of cross one another high temperature high voltage resistant, and the most each cellosilk longitude and latitude is woven together.Cellosilk can be the material of other high temperature high voltage resistant such as glass fibre or carbon fiber.Described filametntary a diameter of 7-30 μm, thus can have the cellosilk of substantial amounts on an inner core, can improve the hardness of packing element 10 greatly, the most filametntary diameter can also be other numerical value, but according to the test of inventor, to be advisable less than 2mm.This is because, inventor finds, by relatively difficult for the inner core that the glue forming colloid 109 penetrates into multifilament, the speed that glue penetrates into when the thickness of inner core is 2mm is optimal, and the speed that glue penetrates into after the thickness of inner core is more than 2.5mm will be the slowest.So, in one embodiment, the thickness of each described inner core is 2mm, can also be 1.8mm or 2.5mm in other embodiments.
By narration above, in the technical scheme of the application, being not required to this cellosilk and have elasticity, this is owing to contraction and the expansion of packing element 10 are completed by seal 50, is more precisely completed by the colloid 109 in seal 50.Mentioned above, colloid 109 is distributed on the surface of each described inner core and internal and by bonding for each described cellosilk.It is desired that the bonding every cellosilk of colloid 109, and each cellosilk is bonded together across.Owing to all being sealed by colloid 109 inside and outside inner core, thus see on the whole, inner core the most as shown in Figure 7 and Figure 8 as substantially, and entirety is all covered by colloid as common packing element.
See Fig. 2, each described inner core the most cylindrically and along described packing element 10 axial direction A extend, as shown in Figure 7, the diameter of each described inner core on a cross section of the radial direction of described packing element 10 is different, and such structure can increase the hardness of packing element 10.When distance between each inner core is identical, additionally it is possible to the hardness in equal area making packing element 10 as much as possible is essentially identical, otherwise packing element 10 unbalance stress and locally caving in.But, when as it is shown in figure 9, when packing element 10 is syllogic, the cross section of the radial direction of each section of packing element can as it is shown in fig. 7, thus the packing element 10 shown in Fig. 9 generally speaking, just there are three identical inner cores being sequentially distributed in the axial direction of diameter.
According to the technical scheme of the application, owing to being coated with inner core in colloid 109, inner core has cross one another cellosilk, and colloid 109 is distributed on the surface of each inner core and internal and by bonding for each cellosilk.First, being mixed with cellosilk in colloid 109, when packing element 10 is expanded (inwardly or outwardly) by axial compressive force, cellosilk will limit this expansion, thus increases the structural rigidity of packing element 10 on the whole, increases the comprcssive strength of packing element 10.Especially, when cellosilk consists of a cylindric inner core, when inner core is by axial compressive force F, inner core can evenly radially be expanded, inner surface 102 by making packing element 10 during axial compressive force is the most inwardly protruding, outer surface 101 outwardly convex equably, it is therefore prevented that uneven projection and cause the partial collapse of packing element 10, it is therefore prevented that uneven radial dilatation and cause the partial collapse of packing element 10.Further, in an embodiment of the application, the colloid thickness between each layer inner core is identical, thus can guarantee that the end of the packing element 10 acted on by axial compressive force F can stress the most equably, it is therefore prevented that the end of packing element 10 is by conquassation.
Seeing Fig. 7, when the internal layer inner core 106 of the packing element 10 in Fig. 7 is long as the through hole 103 of packing element 10, say, that in axial direction A, quantity is the length length equal to through hole 103 of the inner core of, and it can form the packing element 10 shown in Fig. 2.In the same manner, in described axial direction A, quantity is that the described inner core of at least two is mutually bonded and the length sum of bonding each described inner core is equal to the length of described through hole 103, when for example, three, it can form the packing element 10 shown in Fig. 9, thus forms multiple seal section.The about collar arranged two ends not shown in Fig. 9, but show that the place connected at every section of packing element is provided with about collar 20.
The about collar 20 of packing element 10 is described in detail below.
With reference to Fig. 3-Fig. 6, wherein Fig. 3 shows the structural representation of the about collar 20 before being compressed by axial compressive force F, Fig. 4 shows the position relationship schematic diagram of the about collar 20 before being compressed by axial compressive force F and seal 50, Fig. 5 shows that Fig. 6 shows the schematic shapes of the about collar after compression 20 and seal 50 by the change schematic diagram of about collar 20 and seal 50 in axial compressive force F compression process.
As it is shown on figure 3, about collar 20 entirety is enlarging shape, it has flared end 22 and necking end 21.See Fig. 4, the flared end 22 of described about collar 20 is set on described first end 104 and described the second end 105, in other embodiments, flared end 22 can also only be set on one of first end 104 and the second end 105, and it has mainly depended on that this end prevents from deforming in compression process excessive the need of restrained deformation.In Fig. 4-Fig. 6, the quantity of described about collar 20 is two, and the flared end 22 of one of them described about collar 20 is set in described first end 104, and the flared end 22 of another described about collar 20 is set on described the second end 105.Seeing Fig. 5, the necking end 21 of described about collar 20 extends through by the sheathed described first end 104 of described flared end 22 or described the second end 105 for bearing axial compressive force.In figures 4 and 5, only show schematically about collar 20 and the position relationship of seal 50, it practice, about collar 20 is combined closely with seal 50, contact with each other the most between the two.From fig. 6, it can be seen that after bearing axial compressive force F, described 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, and now the outer surface 101 of seal 50 seals with sleeve pipe 40, and the inner surface 102 of seal 50 seals with central canal 30.
The about effect of collar 20 is the most extremely important, and this is owing to the inner core of the application is the most axially arranged, and is also axial compressive force to inner core generation effect.So, it is however very well possible to ground, inner core can scatter in radial direction because of the effect of axial compressive force, causes each inner core of packing element 10 to separate.By about collar 20 in the constraint of end, it is possible to limit inner core separation at outermost both sides.And the colloid that has in other place of inner core is filled, so the probability separated is less.
In the embodiment shown in figs. 4 and 5, the edge chamfer of first end 104 and the second end 105 processes to adapt with about collar 20, it is to say, matched with described flared end 22 in reducing shape by the sheathed described first end 104 of described flared end 22 and described the second end 105.This design of packing element 10 can increase the end of packing element 10 and the contact area of about collar 20, and between end and axial compressive force F of this kind of design, there is angle, thus need bigger axial compressive force F ability compression seal body 50 to produce the deformation of nominal amount, a certain degree of setting force increasing needs.As shown in Figure 6, after applying axial compressive force F, packing element 10 inwardly or outwardly will extend to radial direction, constraint due to sleeve pipe 40, the most about collar 20 will limit at sleeve pipe 40 in the range of carry out expansion radially, the flared end 22 of final about collar 20 is by essentially identical with the diameter of seal 50 and the most essentially identical with the internal diameter of sleeve pipe 40.As it is shown in figure 5, in compression process, can form projection, schematically illustrating a projection 60 in Fig. 5, when actual compression, outer surface 101 entirety of seal 50 expands outwardly as projection, and inner surface 102 entirety is inward expansion as projection.Very important, if about collar 20 is chosen as the material of difficult deformation, then as shown in Figure 5, 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 the sealing of seal 50.The most about collar is chosen as copper sheathing, and determines the maximum gauge of flared end 22 less than 2mm in upper thickness limit, and flared end 22 refers to whole trumpet-shaped edge in such as Fig. 3, rather than that end face of the rightmost side in a Fig. 3.Such restriction enables to about collar 20 will not cause damage to protruding 60, or damage is the slightest.And being also beneficial in compression process, about collar 20 is deformed and becomes as shown in Figure 6 by sleeve pipe 40.Based on same reason, can not use the about collar 20 of perpendicular type as shown in Figure 6 before compression, otherwise during compression, the outer surface 101 of gradually protruding seal also can be produced and shears by about collar 20.In this application, described about collar 20 is bell mouth shape, and during compression, about collar 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 it is shown on figure 3, necking end 21 has inside bevelling, when compression, bevelling will be around central canal 30, and bevelling receives axial compressive force F, and such being designed to makes wedging ring 20 in an orderly manner, gradually deform, will not be by the unexpected conquassation of axial compressive force F.
So far, those skilled in the art will recognize that, although the most detailed multiple exemplary embodiments illustrate and describing the application, but, in the case of without departing from the application spirit and scope, still can directly determine according to present disclosure or derive other variations or modifications of many meeting the application principle.Therefore, 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), there is seal, described seal (50) has and is positioned at the through hole (103) at center, is positioned at the inner surface (102) at through hole (103) the place outer surface (101) corresponding with described inner surface (102) and lays respectively at first end (104) and the second end (105) at described packing element (10) two ends, it is characterized in that
Described packing element (10) includes multiple inner core, each described inner core the most cylindrically and along described packing element (10) axial direction extend, each described inner core is respectively provided with the plurality of fibers silk of cross one another high temperature high voltage resistant, and colloid (109) is distributed on the surface of each described inner core and internal and by bonding for each described cellosilk；
Wherein, the diameter of each described inner core in the radial direction cross section of described packing element (10) is different.
Packing element the most according to claim 1 (10), it is characterised in that
On described axial direction, quantity is the length length equal to described through hole (103) of the described inner core of.
Packing element the most according to claim 1 (10), it is characterised in that
On described axial direction, quantity is that the described inner core of at least two is mutually bonded and the length sum of bonding each described inner core is equal to the length of described through hole (103).
Packing element the most according to claim 1 (10), it is characterised in that
The thickness of described inner core is 1.8mm-2.5mm.
Packing element the most according to claim 1 (10), it is characterised in that
The quantity of described inner core is 10-15.
Packing element the most according to claim 1 (10), it is characterised in that also include:
The about collar (20) extended on described axial direction, described about collar (20) is overall in enlarging shape, the flared end (22) of described about collar (20) is set on described first end (104) or described the second end (105), and the necking end (21) of described about collar (20) extends through and is used for bearing axial compressive force by the sheathed described first end (104) of described flared end (22) or described the second end (105).
Packing element the most according to claim 6 (10), it is characterised in that
Described necking end (21) has inside bevelling.
Packing element the most according to claim 6 (10), it is characterised in that
The described first end (104) sheathed by described flared end (22) or described the second end (105) match with described flared end (22) in reducing shape.
Packing element the most according to claim 6 (10), it is characterised in that
Described about collar (20) is copper, and the maximum gauge of described flared end 22 is less than or equal to 2mm.
Packing element the most according to claim 6 (10), it is characterised in that
The quantity of described about collar (20) is two, the flared end (22) of one of them described about collar (20) is set in described first end (104), and the flared end (22) of another described about collar (20) is set on described the second end (105).
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| CN201620243432.XU CN205422631U (en) | 2016-03-28 | 2016-03-28 | Packing element with cylindric inner core |
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| CN201620243432.XU CN205422631U (en) | 2016-03-28 | 2016-03-28 | Packing element with cylindric inner core |
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| CN205422631U true CN205422631U (en) | 2016-08-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105756611A (en) * | 2016-03-28 | 2016-07-13 | 天鼎联创密封技术（北京）有限公司 | Rubber cylinder with cylindrical inner cores |
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2016
- 2016-03-28 CN CN201620243432.XU patent/CN205422631U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105756611A (en) * | 2016-03-28 | 2016-07-13 | 天鼎联创密封技术（北京）有限公司 | Rubber cylinder with cylindrical inner cores |
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