CN106089146B - Packing element, packer and bridge plug including wire sealing ring - Google Patents
Packing element, packer and bridge plug including wire sealing ring Download PDFInfo
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- CN106089146B CN106089146B CN201610700678.XA CN201610700678A CN106089146B CN 106089146 B CN106089146 B CN 106089146B CN 201610700678 A CN201610700678 A CN 201610700678A CN 106089146 B CN106089146 B CN 106089146B
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- sealing ring
- packing element
- ring
- fiber filament
- spacer ring
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- 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
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- Engineering & Computer Science (AREA)
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Gasket Seals (AREA)
Abstract
This application involves field of sealing technology, more particularly to packing element, packer and the bridge plug including wire sealing ring that can bear high temperature and pressure used in a kind of oil exploitation industry.Packing element includes wire sealing ring and fiber filament sealing ring, and wire sealing ring is inconsistent with fiber filament sealing ring and is arranged below；Wire sealing ring includes cross one another more one metal wires and colloid that each wire bonds together；Fiber filament sealing ring includes cross one another high-temperature and high-presure resistent plurality of fibers silk and colloid that each fiber filament bonds together.When the lower section of fiber filament sealing ring is arranged in the wire sealing ring of the application, wire sealing ring passes to the axial compressive force of fiber filament sealing ring because that can reduce with the friction of central tube and/or casing, the axial compressive force that fiber filament sealing ring is subject to can effectively be reduced at this time, and shoulder Producing reason is that axial compressive force is excessive, so this design the generation that can reduce or prevent shoulder.
Description
Technical field
This application involves field of sealing technology, more particularly to high temperature and pressure can be born used in a kind of oil exploitation industry
Packing element, packer and bridge plug including wire sealing ring.
Background technique
Packer is a kind of key tool that oil field well recovers the oil, and is widely used in oil field dispensing, separate zone stimulation, layering are adopted
Several work, the packers such as oil, mechanical pipe water blockoff need to carry out the packing of annular space, to realize that oil gas is layered, and realize annular space
The core component of packing is packing element.Bridge plug is also a kind of tool of oil gas layering generally used in oil extraction operation.Packer and
The main distinction of bridge plug, which is that packer is usually temporary when pressure break, being acidified, looking for the measures such as leakage construction, to be stayed in well, and bridge
Plug is temporarily or permanently stayed in well in measures such as sealing oil recoveries.Packer and central tube stay well simultaneously, mix that give up can
Individually to stay well, and bridge plug is then individually to stay well.Structurally, packer is hollow structure, can flow freely oil gas water,
And in bridge plug it is then solid construction.
As the tool of Oil-gas Separation, packer and bridge plug require packing element, critical component of the packing element as sealing, matter
Amount directly affects the sealing effect and service life of packer and bridge plug, and conclusive effect is played in packer and bridge plug.
Packing element is generally made of rubber type of material, therefore referred to as packing element.But packing element is only a kind of technology art that the interior agreement of industry becomes social custom
Language, for indicating to play the functional parts of sealing function, and referring not only to packing element can only be made by rubber.When packing element bears one
When fixed pressure is used to seal to promote it to deform, need to consider the deformability of packing element itself, if deformation deficiency will lead to it
Sealing function can not be played；If deformation is excessive, it may cause packing element and fail because of conquassation, lose recovery capability.Most of all,
When packing element underground by high-temperature steam act on when, while packing element is more by high temperature and pressure act on and fail cause to lose
Go recovery capability.
" petroleum machinery " of 9th phase in 2002 discloses " packer compresses packing element " protrusion-dispelling " new construction ", has been described
Following content: " so-called protrusion-dispelling exactly places certain blocker ring, supporting element, limits device and guard member etc. in packing element end, uses
Packing element is prominent towards oil sets annular space when preventing and limiting packer setting or flows "." since anti-lug structure is for covering
Annular gap between packer and casing, when packer setting, once packing element deformation is contacted with casing wall, under load acts on outside,
Outburst prevention device prevents packing element towards prominent in this annular space with regard to the unfolded annular space covered between packer and casing wall, forces the packing element to be in
It respectively to uniform compression, generates and keeps the higher contact stress of packing element, to obtain good sealing "." ... mainly have
Copper bowl curing type and steel mesh or two kinds of steel band curing type.The former is that the copper bowl of two 2mm thickness is solidificated in two end packing elements respectively
On a certain end face, the latter is solidificated in the steel mesh of thick 1mm or so or steel band respectively on a certain end face of packing element of two ends ".
Disclose within 2013 first-phase " oil field equipment " text of " packer rubber barrel structure improves and benefit analysis "
The following contents has been described in chapter: " string has 3 packing elements on common packer, is divided into the packing element structure size of upper, middle and lower 3
Identical and upper lower rubber cylinder is long packing element type, middle packing element is 2 kinds of structure types of short rubber cylinder.It is sent out by the research to traditional three packing element structures
Existing, play main seal is upper packing element ".Also, non-linear point is carried out by non linear finite element analysis software Abaqus
Analysis obtains: " as axial load increases, axial compression amount also increases, and decrement increases more apparent when beginning, and subsequent decrement increases
Slow down greatly, packing element deformation tends towards stability；With the increase of setting force, packing element is gradually increased with casing-contact length.Packing element appearance
Cylinder partial limited radial deformation system, packing element inner surface deformation outward bulge as appearance, when load increases, packing element is crushed
And it is compacted finally.But since structure limits, only upper packing element can be compacted.When operating pressure is 30MPa, upper packing element base
This completely densified, there is slight shoulder in packing element upper end, but packing element does not occur and isolates phenomenon, and shoulder is within allowed band ".
Think in " improvement of high-pressure packer cartridge " in the first phase in 2009 " oil field equipment " " due to rubber
Glue surface layer is easy to be torn, therefore considers to add one layer of sheet metal (such as copper sheet) on the surface layer of rubber ".
But the above-mentioned prior art only analyzes and applies first axis pressure (being equivalent to " axial load ") to packing element deformation
Influence.But it in the actual production process, needs to apply packing element first one top-down first axis pressure to make glue
Cylinder generates preliminary sealing, and then packing element applies the second axial compressive force for will receive from bottom to top (substances such as downhole gas are to packing element
Impact).According to the test of inventor, when first axis pressure is 30MPa, inventor has found that almost all of packing element all can
There is shoulder, when further applying a second axial pressure (such as 15MPa or 20MPa), all packing elements can be at shoulder
Generation is isolated, and seal failure is caused.
Further, inventor also found, though the sealing that packing element can be of short duration when applying a second axial pressure, but well
When the substances such as spirit body impact packing element, the small molecule for the high temperature and high pressure steam being contained therein can be to the packing element of high molecular material
Degradation is generated, packing element is caused to follow the string first in lower end and sealing function can not be played, influences the length of packing element sealing
Effect property.
Summary of the invention
One of the application is designed to provide a kind of packing element of new structure design, to prevent or reduce packing element generation
Shoulder.
According to the one aspect of the application, a kind of packing element including wire sealing ring is provided, is had centrally located logical
Hole, outer surface corresponding with the inner surface, is located at the upper of the packing element both ends at the inner surface positioned at the through hole
End and lower end and the middle part between the upper end and the lower end, the upper end is for bearing along axis
To the first axis pressure in direction, the lower end is for bearing along the opposite with the first axis pressure of the axial direction
The second axial compressive force；When the first axis pressure is applied to the upper end, the upper end, middle part and lower end
In radial direction, deformation occurs；When second axial compressive force is applied to the lower end, the upper end, middle part and
In the radial direction, deformation occurs for lower end, and the packing element includes the more than one metal in axial direction arrangement
Silk sealing ring and more than one fiber filament sealing ring, one of those described wire sealing ring and one of those described fibre
Dimension silk sealing ring is inconsistent and the lower section of the fiber filament sealing ring is arranged in；
The wire sealing ring includes cross one another more one metal wires and each wire bonds together
Colloid；
The fiber filament sealing ring includes cross one another high-temperature and high-presure resistent plurality of fibers silk and by each fiber
The colloid that silk bonds together.
Preferably, it is provided with the first inconsistent spacer ring below one of those described wire sealing ring, with the gold
Belong to and be provided with the second inconsistent spacer ring above the inconsistent fiber filament sealing ring of silk sealing ring, described first every
The hardness of ring and second spacer ring is all larger than the hardness of the wire sealing ring and the fiber filament sealing ring；
Also, spacer ring is not provided between the wire sealing ring and its inconsistent fiber filament sealing ring.
Preferably, first spacer ring and second spacer ring are metal material.
Preferably, first spacer ring and second spacer ring are aluminium material；
First spacer ring with a thickness of D1, second spacer ring with a thickness of D2, and 4mm≤D1≤6mm, 4mm≤
D2≤6mm。
Preferably, first spacer ring with a thickness of 5mm.
Preferably, second spacer ring with a thickness of 5mm.
Preferably, first spacer ring and second spacer ring are iron material matter；
First spacer ring with a thickness of D1, second spacer ring with a thickness of D2, and 2mm≤D1≤4mm, 2mm≤
D2≤4mm。
Preferably, the thickness of first spacer ring and second spacer ring is 3mm.
According to further aspect of the application, a kind of packer is provided, which has one of above-mentioned technical proposal institute
The packing element of restriction.
According to another aspect of the application, a kind of bridge plug is provided, which there is one of above-mentioned technical proposal to be limited
Packing element.
Technical solution provided by the present application at least has the following technical effect that
1, according to the technical solution of the application, the hardness of upper end is greater than the hardness of middle part, in this way upper end by
When first axis pressure, upper end is more that the first axis pressure is passed to middle part and lower end not for itself
Radial deformation.It can allow middle part and lower end that radial become occurs when using lesser first axis pressure in this way
Shape, to reach the sealing of packing element entirety.
2, according to the technical solution of the application, in the case where the hardness of middle part is constant, the application is by the hard of upper end
Degree is set greater than the hardness of middle part, and in this way when the first axis pressure by same size acts on, upper end is in radial direction
The deformation in direction is smaller, it is accordingly required in particular to it is noted that the shoulder that correspondingly upper end is formed by radial deformation is also smaller.It is smaller
Shoulder can be effectively prevented packing element and isolate, achieved the effect that prevent packing element seal failure.
3, in one embodiment, due to including plurality of fibers silk, the sealing ring when filametntary quantity is more in matrix
Partially hard, when filametntary negligible amounts, sealing ring is partially soft, thus can adjust sealing ring according to filametntary quantity
Soft or hard degree can be directly changed the hardness of packing element entirety by changing the hardness of sealing ring in this way, reach and increase packing element
The purpose of compression strength range.Also, when packing element is expanded by first axis pressure, fiber filament will limit the expansion, from
And increase the structural rigidity of packing element on the whole, increase the compression strength of packing element.
4, this application involves multiple sealing ring axial alignments, if there is individual sealing rings to damage during oil exploitation,
The sealing ring of damage can be changed to new sealing ring, and remaining sealing ring is no longer replaced.So on the whole for, increase
Single sealing ring average use duration can greatly reduce the usage amount of packing element, reduce production cost.
5, when the matrix of the application is selected as packing, existing high-temperature and high-presure resistent packing can be selected, in this way, working as glue
When body and graphite packing or carbon fiber plate root are combined into as sealing ring, packing can integrally play a supporting role, and colloid can rise
The effect reinforced to deformation and sealing.The application selects existing packing, and does not have to make the special packing as matrix, energy
Enough flexibilities for increasing production.According to the inventors knowledge, existing graphite packing and carbon fiber packing can be resistant to high temperature and pressure
Effect, but the resilience of graphite packing and carbon fiber packing is poor.In this application, colloidal dispersions are among packing,
Colloid facilitates compressed packing and is sprung back after one axial compressive force disappears, and takes out to be conducive to packing element from underground.
6, when the lower section of fiber filament sealing ring is arranged in the wire sealing ring of the application, wire sealing ring because with center
The friction of pipe and/or casing can reduce the axial compressive force for passing to fiber filament sealing ring, can effectively reduce fiber filament at this time
The axial compressive force that sealing ring is subject to, and shoulder Producing reason is that axial compressive force is excessive, so this design can reduce
Or prevent the generation of shoulder.
Detailed description of the invention
Some specific embodiments of the application are described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter.
Identical appended drawing reference denotes same or similar part or part in attached drawing.In attached drawing:
Fig. 1 is the compression packer comprising packing element of the application one embodiment and the positional relationship of central tube and casing
Schematic diagram；
Fig. 2 is the packing element of the application one embodiment and the positional diagram of central tube and casing, wherein only showing
A part of packing element, central tube and casing；
Fig. 3 shows packing element shown in Fig. 2 and is applied the shoulder that generates after first axis pressure and central tube and casing
Positional diagram does not also apply a second axial pressure to packing element at this time；
Fig. 4 is the structural schematic diagram of the packing element of the application one embodiment；
Fig. 5 is the structural schematic diagram of the sealing ring of the application one embodiment；
Fig. 6 is the cross-sectional view of the sealing ring of the application one embodiment；
Fig. 7 is the cross-sectional view of the application one embodiment sealing ring；
Fig. 8 is the cross-sectional view of the sealing ring of the application one embodiment；
Fig. 9 is the cross-sectional view of the sealing ring of the application one embodiment；
Figure 10 is the cross-sectional view of the sealing ring of the application one embodiment；
Figure 11 is the cross-sectional view of the packing element that through-hole is not shown of the application one embodiment；
Figure 12 is the structural schematic diagram according to the packing element of the three-stage of the application one embodiment.
Appended drawing reference in figure is as follows:
10- packing element, the outer surface 101-, 102- inner surface, 103- through-hole, the upper end 104-, 105- middle part, the lower end 106-
Portion, 107- shoulder；
108- matrix, 109- colloid, the first copper sheet of 111-, copper sheet on the inside of 111a-, copper sheet on the outside of 111b-, 111c- opening,
Copper sheet on the upside of 111d-, the downside 111e- copper sheet, the second copper sheet of 112-, 113- third copper sheet；
30- central tube；
40- casing；
The first spacer ring of 51-, the second spacer ring of 52-, 53- third spacer ring, the 4th spacer ring of 54-；
70- sealing ring, 71- wire sealing ring, 72- fiber filament sealing ring, 73- graphite-seal ring；
200- compression packer；
A- first axial direction；
The second axial direction of B-；
F1First axis pressure；
F2- the second axial compressive force.
Specific embodiment
Direction "upper" described below, "lower" are using Fig. 2 as with reference to describing.
Compression packer 200 as shown in Figure 1 has the packing element 10 of the application.During compression packer 200 is connected to
It is placed on heart pipe 30 in casing 40.The needs of compression packer 200 separate different oil reservoirs, water layer and hold in the wellbore
By certain pressure difference, it is desirable that pit shaft predetermined position can be descended, packing is tight, and can have durability in underground, can be smooth when needing
It rises.
As shown in Fig. 2, packing element 10 is located in the annular space that casing 40 and central tube 30 form, rigid spacer ring 50 is in axial direction
The first axis pressure F of (i.e. first axial direction A) from top to bottom is provided on direction1, can also remove in other embodiments
Rigid spacer ring 50 and by can to packing element 10 apply first axis pressure F1Other components replace.As shown in Fig. 2, 10 liang of packing element
End is upper end 104 and lower end 106, and middle part 105 is between upper end 104 and lower end 106.Upper end 104 is used for
Bear first axis pressure F in axial direction1, lower end 106 be used for bear in axial direction with first axis pressure F1Phase
The second anti-axial compressive force F2.As a part of packing element 10, upper end 104, lower end 106 and middle part 105 should have
It is flexible.As the restriction of a kind of explanation and elastic size to elasticity, as first axis pressure F1It is applied to upper end 104
When, in radial direction, deformation occurs for upper end 104, middle part 105 and lower end 106；As the second axial compressive force F2It is applied to
When lower end 106, in radial direction, deformation occurs for upper end 104, middle part 105 and lower end 106.Implementation shown in Fig. 2
In example, upper end 104 and lower end 106 all have bevel edge, can also be not provided with the bevel edge in other embodiments.
As shown in figure 3, inventors have found that when upper end 104 is by first axis pressure F1When, upper end 104 can generate
Very big shoulder 107, when applying a second axial pressure F again2When, upper end 104 can isolate at the shoulder 107 in Fig. 3.
The structure of shoulder 107 is reduced or prevented to design to describe the application below.
In the embodiment shown in fig. 4, the generally tubular of packing element 10, packing element 10 have centrally located through-hole 103, the through-hole
103 are limited by inner surface 102 and are formed, and outer surface 101 is located at the outside of through-hole 103 corresponding with inner surface 102.When
One axial compressive force F1Upper end 104 or the second axial compressive force F are acted on along first axial direction A2It is acted on along the second axial direction B
When lower end 106,10 entirety of packing element will be axially compressed and be radially expanded and (have with " deformation occurs in radial direction "
Have identical meaning), promote 101 outwardly convex of outer surface and inner surface 102 is inwardly protruding, but is generally outer in timing
The first partly outwardly convex in surface 101.Applying first axis pressure F1Afterwards, the central tube in inner surface 102 and Fig. 1 and Fig. 2
30 sealings, outer surface 101 are sealed with the casing 40 in Fig. 1 and Fig. 2.Generally, the gap between inner surface 102 and central tube 30
Smaller (being almost bonded to each other), and the gap between outer surface 101 and casing 40 is larger, since central tube 30 and casing 40 are distinguished
The maximum raised size of inner surface 102 and outer surface 101 is defined, so leading to 101 outwardly convex of outer surface
Degree is greater than the inwardly protruded degree of inner surface 102.
A kind of design reducing shoulder 107:
As described above, upper end 104, lower end 106 and middle part 105 should have elasticity, but in Fig. 2 and Fig. 4 institute
Show in embodiment, the hardness of upper end 104 is greater than the hardness of middle part 105.So first axis pressure F is born in upper end 1041
When, middle part 105 is greater than upper end 104 in the deformation of radial direction in the deformation of radial direction.
Since the hardness of upper end 104 is greater than the hardness of middle part 105, in this way in upper end 104 by first axis pressure
Power F1When, upper end 104 is more by first axis pressure F1Middle part 105 and lower end 106 are passed to not for certainly
The radial deformation of body.Lesser first axis pressure F can used in this way1When middle part 105 and lower end 106 can be allowed to send out
Raw radial deformation, to reach the whole sealing of packing element 10.Inventor in experiments it is found that, if the hardness of upper end 104 is little
In the hardness of middle part 105, then upper end 104 is by first axis pressure F1When, it is more the radial direction change for itself
Shape rather than pass to middle part 105 and lower end 106, prevent or reduce shoulder 107 as shown in Figure 3.
According to the technical solution of the application, in the case where the hardness of middle part 105 is constant, the application is by upper end 104
Hardness be set greater than the hardness of middle part 105, in this way in the first axis pressure F by same size1When effect, upper end
Portion 104 is smaller in the deformation of radial direction, it is accordingly required in particular to it is noted that correspondingly upper end 104 is formed because of radial deformation
Shoulder 107 is also smaller.Lesser shoulder 107 can be effectively prevented packing element 10 and isolate, and having reached prevents 10 seal failure of packing element
Effect.
Since the radial deformation of upper end 104 is smaller, it is likely that ground, at this time upper end 104 radial direction deformation
Casing 40 and central tube 30 are sealed through deficiency, that is to say, that upper end 104 will no longer play sealing function at this time, and be only
The first axis pressure F being subject to1Middle part 105 and lower end 106 are passed to, this is the packing element 10 and the prior art of the application
Packing element a critically important difference.Moreover, even if the radial deformation of upper end 104 is larger by casing 40 and center
Pipe 30 seal, the sealing of upper end 104 at this time be also only to the packing element 10 sealing one supplement, no matter upper end 104 whether
Play sealing function, 104 hardness of upper end is greater than the setting of 105 hardness of middle part, it is therefore prevented that shoulder 107 it is excessive caused by
Packing element 10 isolates, and can also use lesser first axis pressure F1Packing element 10 is sealed.
According to the technical solution of the application, in the case where the hardness of middle part 105 is constant, the application is by upper end 104
Hardness be set greater than the hardness of middle part 105, but upper end 104 in this way is in first axis pressure F1It may be simultaneously under effect
It is not contacted with casing 40 and does not play sealing function.It is hard when lower end 106 and middle part 105 under this kind of special construction
When spending essentially identical, the sealing of the packing element of the application is provided by lower end 106 and middle part 105；When lower end 106 and upper end
When the hardness in portion 104 is essentially identical, the sealing of the packing element of the application is provided by middle part 105.The packing element 10 of the application in this way
It is entirely different in the structure to seal with the packing element of the prior art.
As a preferred embodiment, when the inner wall of the outer wall of upper end 104 and casing 40 is inconsistent, be more preferably on
When the outer wall of end 104 and the inner wall of casing 40 seal, the basic homalographic in the lower part of upper end 104 it is covered in middle part at this time
Difference in the radial direction is substantially not present in 105 top, upper end 104 and middle part 105, so as to middle part 105 with
104 junction of upper end generate it is downward compress effect, prevent or reduce middle part 105 and the appearance of 104 junction of upper end
Shoulder.
If " being as described above more by first axis pressure F to reach1Pass to middle part 105 and lower end
Radial deformation of the portion 106 not for itself " and upper end 104 do not generate the effect of shoulder 107, can be used on-deformable
Metal block, such as iron block.If the diameter of metal block is smaller, bigger shoulder can be generated with the middle part 105 of metal block contact
107, if metal block is relatively large in diameter, consider the bending situation of casing 40, metal block is not easy to slide into conjunction in casing 40
Suitable position is especially considering that coasting distance may be up to 1 kilometer, when 40 inner wall of casing has raised sundries.If casing
Entering foreign matter in 40, then biggish metal block is also not easy to detach out of casing.On the other hand, lifting force is smaller cannot then incite somebody to action
Metal block is detached out of casing 40, and lifting force is larger, may damage casing 40.Comprehensively consider, upper end used in this application
104 have elasticity, but the elasticity to upper end 104 is needed to be defined, i.e., the hardness of upper end 104 is greater than middle part 105
Hardness, the diameter that such upper end 104 can be done is smaller, convenient in set in-pipe, such as upper end 104 can be with middle part
105 diameter is identical.Since upper end 104 is harder, its own is not easy to form shoulder 107 or the shoulder 107 of formation is smaller, by
In in compression upper end 104 radial direction gradually extensional and deformation occurs, reduce upper end 104 and casing 40 it
Between gap, thus reduce or prevent middle part 105 shoulder formation and formation size.
In one embodiment, the hardness of lower end 106 is greater than the hardness of middle part 105, so that lower end 106 bears the
Two axial compressive force F2When, middle part 105 is greater than lower end 106 in the deformation of radial direction in the deformation of radial direction.Based on same
The principle of sample, such structure can prevent lower end 106 from bearing first axis pressure F1Or the second axial compressive force F2When produce
Raw shoulder, and can prevent lower end 106 from further bearing the second axial compressive force F under the case where having generated shoulder2
Shi Zaocheng shoulder becomes larger, to prevent lower end 106 from being isolated and causing 10 seal failure of packing element.
In another embodiment, upper end 104 and the hardness of lower end 106 are essentially identical, that is to say, that upper end
104 are all larger than the hardness of middle part 105 with the hardness of lower end 106, so no matter by first axis pressure F1Or second
Axial compressive force F2When, the deformation of middle part 105 is all larger than upper end 104 and lower end 106.Such structure can make middle part
105 quickly reach sealing state, and prevent upper end 104 and lower end 106 shoulder occurs or prevent upper end 104 with
The shoulder that lower end 106 has generated becomes larger.
In embodiment as shown in Figure 2, Figure 3 and Figure 4, packing element 10 is by upper end 104, lower end 106 and middle part 105 3
It is grouped as.By taking Fig. 4 as an example, on first axial direction A, that is, on top-down direction, three sealing rings 70 fill respectively
It when upper end 104, lower end 106 and middle part 105, but is more to serve as middle part 105 by least two sealing rings 70.
Another kind reduces the design of shoulder 107:
Background technology part mention " so-called protrusion-dispelling, exactly packing element end place certain blocker ring, supporting element, limitation dress
It sets with guard member etc., packing element is towards oil sets annular space is prominent or flowing when for preventing and limit packer setting ".
Background technology part mention " ... mainly have copper bowl curing type and steel mesh or two kinds of steel band curing type.The former be by
The copper bowl of two 2mm thickness is solidificated in respectively on a certain end face of packing element of two ends, and the latter is by the steel mesh of thick 1mm or so or steel band point
It is not solidificated on a certain end face of packing element of two ends ".
Above two existing design follows same thinking: directly being limited in the happening part of shoulder using attaching means
System directly prevents the generation of shoulder.So the hardness of attaching means is problem in need of consideration: in packing element if attaching means is really up to the mark
During deformation (especially generation shoulder), it is likely that attaching means can generate incised wound to packing element, can not if attaching means is excessively soft
Play the role of preventing shoulder.So the requirement to attaching means is very strict, for example, for the above-mentioned prior art copper bowl and
Speech needs the thickness of stringent control copper bowl.
" according to the test of inventor, when first axis pressure is 30MPa, inventor's discovery is several as stated in the background art
Shoulder can all occur in all packing elements, all when further applying a second axial pressure (such as 15MPa or 20MPa)
Packing element can be generated at shoulder and be isolated, and lead to seal failure ".Inventor thinks change from the structure of packing element itself
Into a kind of can either sealing to develop and not allowing the packing element structure for being also easy to produce shoulder.But contradiction is, if desired packing element is realized
Then packing element cannot be too hard for sealing function, and if desired preventing shoulder, then packing element cannot be too soft.If packing element is a hardness homogeneous body,
The material for needing to select suitable stiffness that can play does not develop tolerance also at present and in world wide from the point of view of the prior art
The new material that 20MPa high pressure and 350 DEG C of high temperature act on simultaneously.
The application uses different thinkings: the packing element 10 of the application is by multiple sealing rings arranged in the axial direction first
70 compositions, sealing ring 70 each in this way because material selection can hardness it is different, the packing element 10 that harder sealing ring 70 is arranged
Both ends can play and prevent shoulder from leading to the problem of, softer sealing ring 70 can then play the effect of sealing.Further, glue
Cylinder 10 includes the more than one wire sealing ring 71 and more than one fiber filament sealing ring 72 arranged in the axial direction,
In a wire sealing ring 71 and one of fiber filament sealing ring 72 it is inconsistent and be arranged in the fiber filament sealing ring
72 lower section.Wherein, wire sealing ring 71 includes cross one another more one metal wires and each wire bonds together
Colloid.Wherein, fiber filament sealing ring 72 includes cross one another high-temperature and high-presure resistent plurality of fibers silk and by each fiber filament
The colloid to bond together.Inventor passes through test of many times, it is found that existing fiber filament can occur under the action of 22Mpa pulling force
Fracture, therefore the fiber filament sealing ring 72 that fiber filament is made into also is easy to be broken under the effect of 22Mpa axial compressive force.Therefore
Inventor's selection has used wire sealing ring 71.But the adhesive of wire and colloid is less than the adhesion of fiber filament and colloid
Property, if the part to seal all uses wire sealing ring 71, under high pressure effect in wire sealing ring 71
Colloid is likely to fall off, and causes packing element 10 that can not seal, so the application is by wire sealing ring 71 and fiber filament sealing ring 72
Pairing uses.Wire sealing ring 71 is arranged in the reason of lower section of fiber filament sealing ring 72 and is, inventor has found shoulder
It generates and the rupture of shoulder is more to occur to be applied the second axial compressive force F from bottom to top in packing element 102When, work as metal
Silk sealing ring 71 is when being arranged in the lower section of fiber filament sealing ring 72, wire sealing ring 71 because with central tube 30 and/or casing 40
Friction can reduce the axial compressive force for passing to fiber filament sealing ring 72, can effectively reduce at this time fiber filament sealing ring 72 by
The axial compressive force arrived, and shoulder Producing reason is that axial compressive force is excessive, so this design can reduce or prevent shoulder
Prominent generation.In addition wire sealing ring 71 is made of wire and colloid, by first axis pressure F1When, in
Wall and outer wall have substantially been contacted with central tube 30 and casing 40 respectively, the annular constituted in this way in central tube 30 and casing 40
In space, wire sealing ring 71 is applied on fiber filament sealing ring 72 with area substantially identical with annular space cross section,
Along with wire sealing ring 71 compares the characteristic of the anti-shoulder structurally flexible of pure metal, wire sealing ring 71 will not be to fiber filament
The generation of sealing ring 72 is isolated.Especially, as shown in figure 11, when the both ends of packing element 10 are respectively graphite-seal ring 73, due to stone
Black sealing ring 73 is relatively hard, is also arranged with copper sheet, graphite-seal ring in another preferred embodiment outside graphite-seal ring 73
73 can't isolate wire, thus will not isolate wire sealing ring 71.In the embodiment shown in fig. 11, it realizes above-mentioned
The combination of two kinds of anti-shoulder designs, effect are obvious.
A wire sealing ring 71 and a fiber filament sealing ring 72 are only schematically illustrated in Figure 11, in other realities
More wire sealing rings 71 can also be arranged by applying in example, matching with wire sealing ring 71 for identical quantity is similarly arranged
The fiber filament sealing ring 72 of conjunction.
Come the shape and structure that specifically describe sealing ring 70 below.
It is during the test inventors have found that soft or hard variant due to packing element 10, for example, the glue made by polyether-ether-ketone
Cylinder 10 is harder, and packing element 10 is made to reach the first axis pressure F for setting needs1It is larger in other words in the first axis pressure of nominal amount
Power F1Lower rubber cylinder 10 deforms deficiency, causes packing element 10 that can not play sealing function.When packing element 10 is made using softer colloid,
The packing element 10 again can be because of the first axis pressure F of unbearable firmly nominal amount1And it is crushed or even if is able to bear
One axial compressive force F1But it is being subsequently subjected to the second axial compressive force F2When packing element can also be crushed.
Inventor once adulterates multiple high temperature high voltage resistants being separated from each other during solution packing element 10 is softer in colloid
Fiber filament, such as graphite packing silk, glass fiber.It is whole partially that such structure is able to solve packing element 10 to a certain extent
Soft problem.But although inventor it has furthermore been found that doping fiber filament be each connected with colloid, each fiber filament
Between be not connected to or connect substantially it is less, so the hardness of packing element 10 can only be increased very limitedly.So inventor devises
The following technical solution: as shown in figure 5, forming a matrix 108 using cross one another plurality of fibers silk, and make colloid 109
It is distributed on the surface of matrix 108 and is bonded each fiber filament to form sealing ring 70, the sealing ring 70 of this spline structure has in diameter
To the ductility in direction, in other words, enable sealing ring 70 straight in a certain range due to the mutual tied up in knots of each fiber filament
Diameter becomes larger without fracture (mainly filametntary fracture), cross one another during 70 diameter of sealing ring becomes larger
Fiber filament will offset a part of first axis pressure F for promoting its diameter to become larger1, thus to increase the diameter of sealing ring 70
Greatly to a certain extent, it is desirable to provide bigger first axis pressure F1.Especially, colloid 109 by the fiber filament of each intersection tightly
Ground links together, to increase the diameter of sealing ring 70 to a certain extent, it is necessary to bigger first axis pressure F1。
For conclusion, each fiber filament intersects to form a resistance, and each fiber filament is bonded and forms a resistance again by colloid 109,
Under the action of the two resistances, the whole more difficult compression of packing element 10, this is equivalent to, and packing element 10 is whole to be hardened.When sealing ring 70
When filametntary quantity in certain volume is roughly the same, inventor's discovery can adjust phase by changing the thickness of sealing ring
The filametntary quantity mutually intersected, and then required first axis pressure F can be adjusted1Size be applied to setting for packing element 10
The size of power.Likewise it is possible to which the filametntary quantity in the certain volume for passing through increase sealing ring 70 intersects to adjust
Filametntary quantity, and then can also adjust required first axis pressure F1Size.The upper end that above two mode makes
The hardness of sealing ring 70 be greater than the hardness of intermediate sealing ring 70.
Fig. 5 is returned to, for the clear needs in structure, Fig. 5 illustrates only the colloid for being coated on 108 all surface of matrix
109, and the colloid 109 penetrated into inside matrix 108 is not shown.As an explanation to surface herein, such as when matrix 108
When cross section is round, the colloid 109 in Fig. 5 is located on the periphery of matrix 108.Matrix 108 is by more high temperature resistant height in Fig. 5
The fiber filament of pressure is polymerized, such as fiber filament can be other high-temperature and high-presure resistent materials such as glass fibre or carbon fiber.
In one embodiment, each fiber filament longitude and latitude is woven together and forms matrix 108, it is other be each fiber in embodiment
Silk can also be woven together in other ways and form matrix 108.
In Fig. 5 matrix 108 with a thickness of 1.8cm-2.5cm, it is 2-12 that quantity, which can choose,.In embodiment illustrated in fig. 11
In have 6 sealing rings 70, the quantity of matrix 108 is also 6.Filametntary diameter is selected as 7-30 μm, thus can be one
With the fiber filament of substantial amounts on a sealing ring 70, the hardness of packing element 10 can be greatly improved.According to the test of inventor, base
The thickness of body 108 no more than 2cm to be advisable.This is because inventors have found that needing the glue for forming colloid 109 penetrating into base
Sealing ring 70 is formed in body 108, but as the permeating speed of the increase glue of 108 thickness of matrix will be gradually slack-off.Especially
The speed that glue penetrates into after the thickness of matrix 108 is greater than 2.5cm will be very slow.So in one embodiment, each matrix
108 with a thickness of 2cm, in other embodiments or 1.8cm or 2.5cm.
Through narration above it is found that in the technical solution of the application, not necessarily need the fiber filament that there is elasticity,
This is because the contraction and expansion of packing element 10 are completed by colloid 109.Described above, colloid 109 is distributed in the table of each matrix 108
Each fiber filament is simultaneously bonded by face and inside.It is desired that colloid 109 is bonded every fiber filament, and each fiber filament is handed over
Bond together to fork.
The copper sheet coated on packing element 10 is described in detail below.
Inventors have found that can be played if packing element 10 selects suitable material close after solving the problems, such as shoulder 107
Envelope effect, but by very short time (such as six hours) packing element 10 or meeting seal failure in the environment of high temperature and pressure, it is right
The packing element 10 of failure is researched and analysed, and discovery packing element does not fail because of the rupture of shoulder 107 instead of more, because of packing element
It festers and fails in 10 lower end 106.After study, small point of the high temperature and high pressure steam being contained in downhole gas that festers
Son can generate caused by degradation the packing element of high molecular material.After packing element 10 seals, the only lower surface of lower end 106 and well
Spirit body directly contacts, so that packing element 10 be caused to degrade from the bottom up failure.
In the embodiment shown in fig. 6, sealing ring 70 is coated with the first copper sheet 111,111 cladding sealing ring of the first copper sheet
70 lower surface (lower portion), medial surface (left-hand component), lateral surface (right-hand component).As can be seen that the first copper sheet 111 tool
There are opening 111c, opening 111c to be located at the upper surface of sealing ring 70, and extends along the upper surface of sealing ring 70.Implement at one
In example, an aperture can also be shrunk to along the upper surface of sealing ring 70 referring to Fig. 5, the 111c that is open.Be open 111c or aperture
Design, be to be flowed out for gas remaining in sealing ring 70 in order in the case where high temperature and pressure, in the sealing ring of top setting
The gas of high temperature and pressure can also be prevented to flow into when the aperture is compressed from the aperture.In the embodiment shown in fig. 6, opening 111c will
The covering of second copper sheet 112, also can be used the second copper sheet 112 to cover opening 111c in other embodiments.
It has to be considered that sealing ring 70 is circular ring shape, so the first copper sheet 111 being coated on outside it is also circular ring shape,
First copper sheet 111 of circular ring shape is easy to produce rupture in bending place, so in the embodiment shown in fig. 7, the first copper sheet 111 cladding
Medial surface (left-hand component) of upper surface, lower surface and the lateral surface of sealing ring 70 without cladding sealing ring 70.In this way, first
Copper sheet 111 need primary bending i.e. formable, improve the production efficiency of the first copper sheet 111.It is previously mentioned " inner surface 102
Gap between central tube 30 is smaller (being almost bonded to each other), and the gap between outer surface 101 and casing 40 is larger ", institute
It only needs the inwardly protruding of very little that can seal with central tube 30 with sealing ring 70, and needs very big outwardly convex just can be with set
Pipe 40 seals, and the face for thus not coating copper sheet does not select to select in outer side in medial surface.
Referring to Fig. 7, the open edge of the first copper sheet 111 is concordant with the medial surface of sealing ring 70 in Fig. 7, and this design is
In the case where medial surface does not coat copper sheet, protection is generated to the upper and lower surface of sealing ring 70 as much as possible, it is high to reduce high temperature
Press steam to the degradation of sealing ring 70.
In the embodiment shown in fig. 8, sealing ring 70 is coated with third copper sheet 113,113 cladding sealing ring 70 of third copper sheet
Lower surface, medial surface, lateral surface and upper surface or the upper surface of 113 cladding sealing ring 70 of third copper sheet, lower surface with
And lateral surface is without the medial surface of cladding sealing ring 70.When the first copper sheet 111 is also coated on the upper of the graphite-seal ring 73 of lower end
When surface, the shape of the first copper sheet is identical as third copper sheet 113.
In the embodiment shown in fig. 9, sealing ring 70 is coated with inside copper sheet 111a and outside copper sheet 111b, inside copper sheet
A part of lower surface of 111a cladding sealing ring 70, whole medial surfaces (left-hand component) and a part of upper surface.Outside copper sheet
A part of lower surface of 111b cladding sealing ring 70, whole lateral surfaces (right-hand component) and a part of upper surface.And it is interior
Side copper sheet 111a and outside copper sheet 111b has the part for the superposition that overlaps in upper and lower surfaces.
In the embodiment shown in fig. 10, sealing ring 70 is coated with upside copper sheet 111d and downside copper sheet 111e, upside copper
A part of medial surface of skin 111d cladding sealing ring 70, whole upper surfaces (upper rim portion) and a part of lateral surface.Downside copper
A part of medial surface of skin 111e cladding sealing ring 70, whole lower surfaces (lower portion) and a part of lateral surface.On and
Side copper sheet 111d and downside copper sheet 111e has the part for the superposition that overlaps in medial surface and lateral surface.In one embodiment
In, upside copper sheet 111d and downside copper sheet 111e prevent the small molecule and sealing ring 70 of high temperature and high pressure steam in overlapping welding
Direct contact.
Fig. 9 and embodiment illustrated in fig. 10 prevent the first copper sheet also for the quantity for the bending place for reducing by the first copper sheet 111
111 are easy to produce rupture in bending place, and also improve the production efficiency of the first copper sheet 111.
Height can be prevented when two graphite-seal rings 73 when lower end are coated with Fig. 6, Fig. 8 or Fig. 9 copper sheet referring to Figure 11
The small molecule of warm high steam is caused to corrode and be degraded to the graphite-seal ring 73 of lower end.Further, due to the graphite of lower end
Sealing ring 73 is only contradicted with central tube 30 and casing 40, only plays slight sealing function, the graphite-seal ring 73 and set of lower end
It is likely that there are gap between pipe 40, so being also required to cover copper sheet on the lateral surface of the graphite-seal ring 73 of lower end.Due to
The upper surface of the graphite-seal ring 73 of lower end is compressed by the lower surface of wire sealing ring 71, has been completely cut off and high temperature and high pressure steam
The direct contact of small molecule, from this from the aspects of, the upper surface of the graphite-seal ring 73 of lower end do not need covering copper sheet.If
In this way, then the opening of copper sheet is necessarily located on the lateral surface of graphite-seal ring 73 of lower end, in this way in packing element 10 by compression and
During radial deformation, the opening of copper sheet, which can generate wire sealing ring 71, is isolated, thus in the embodiment shown in fig. 6,
Opening 111c is located on upper surface, contacts, is open with the direct of the small molecule of high temperature and high pressure steam in order to further completely cut off
111c covers the second copper sheet 112.Inside copper sheet 111a and outside copper sheet 111b in Fig. 9 are "u"-shaped, during installation
First inside copper sheet 111a can be set on sealing ring 70 from medial surface, be set in sealing from lateral surface by outside copper sheet 111b
On ring 70 and sections inner side copper sheet 111a, copper sheet can be conveniently mounted on sealing ring 70 by such structure, improve peace
Fill efficiency.For two graphite-seal rings 73 of upper end, the structure after combining with copper sheet can be Fig. 6, Fig. 8 or Fig. 9
Shown in structure.When for structure shown in fig. 6, need the first copper sheet 111 and the second copper sheet 112 rotating 180 degree to make
With the 111c that is open at this time is pressed against by the upper surface of fiber filament sealing ring 72, and such structure can prevent opening 111c from opening.
By being used separately as the narration in top and bottom to structure shown in Fig. 6, it is known that opening 111c should all be by adjacent close
Seal ring is pressed against, and prevents the 111c opening that is open when by first axis pressure F1 or the second axial compressive force F2.Knot in Fig. 8
Structure is welded again at gap to realize after being coated sealing ring 70 by using copper sheet.Structure in Fig. 9 why will
The lap of inside copper sheet 111a and outside copper sheet 111b are set to 70 upper and lower surfaces of sealing ring, the reason is that, working as
When the lap of inside copper sheet 111a and outside copper sheet 111b are set to the medial surface or lateral surface of sealing ring 70, when to first
In axial compressive force F1 or the second axial compressive force F2 compression process, adjacent sealing ring may be caused to isolate, and overlapping portion
Set up the upper and lower surfaces for being placed in sealing ring 70 separately, adjacent sealing ring can to overlapping portion extrusion, further completely cut off with
The direct contact of the small molecule of high temperature and high pressure steam.The overlapping of inside copper sheet 111a and outside copper sheet 111b in Fig. 9 weld
After can form structure shown in fig. 8.And it can prevent from bearing the second axial compressive force by the setting to copper sheet thickness
F2When shoulder rupture.In one embodiment, copper sheet with a thickness of 1mm.
It needs to be emphasized that 70 outer cladding copper sheet of sealing ring, to realize sealing ring 70 and central tube 30 and casing
The sealing of 40 sealing, i.e. metal and metal then needs very big pressure.It is coated in embodiments herein, including not
The wire sealing ring 71 and fiber filament sealing ring 72 of copper sheet.The lowermost graphite-seal ring 73 prevents most high temperature and pressure
Steam, the graphite-seal ring 73 of secondary lower end further prevent a part of high temperature and high pressure steam, in this way arrival wire sealing ring 71
It is just considerably less with the high temperature and high pressure steam of fiber filament sealing ring 72, it is effectively reduced high temperature and high pressure steam and wire is sealed
The corrosion and degradation of ring 71 and fiber filament sealing ring 72 extend the sealing duration of packing element 10.
When as shown in figure 12, when packing element 10 is three-stage, each section of packing element all can be an individual packing element, in this way
Packing element 10 shown in Figure 12 is equivalent to be spliced in the axial direction by three mutually independent packing elements.Figure 12 is only with packing element
10 for three-stage as an example, packing element can also have other sections, such as two sections or five sections in other embodiments.
In the embodiment shown in fig. 11, the lower section of wire sealing ring 71 is provided with the first inconsistent spacer ring 51, fiber
The top of silk sealing ring 72 is provided with the second inconsistent spacer ring 52, the first spacer ring 51, the second spacer ring 52, third spacer ring 53 and the
The hardness of four spacer rings 54 is all larger than the hardness of wire sealing ring 71 Yu fiber filament sealing ring 72.Also, wire sealing ring 71
Spacer ring is not provided between fiber filament sealing ring 72.Third spacer ring 53 is arranged between two graphite-seal rings 73 of upper end, the
Four spacer rings 54 are arranged between two graphite-seal rings 73 of lower end.
The spacer ring (the first spacer ring 51, the second spacer ring 52, third spacer ring 53 and the 4th spacer ring 54) and the prior art of the application
Spacer ring role be different: spacer ring is that reason its harder characteristic is set up directly on packing element 10 in the prior art
Both ends prevent the generation of shoulder.And in this application, since packing element 10 is by multiple sealing rings (wire sealing ring 71, fibre
Tie up silk sealing ring 72 and graphite-seal ring 73) composition, since the hardness of each sealing ring is different, so in axial compressive force
The deformation of each sealing ring in the axial direction is different under effect, such as due to fiber filament sealing ring 72 is softer and in axis
To pressure effect under be partially embedded in adjacent graphite-seal ring 73, this will lead to packing element can not seal or sealing effect not
It is good.So in this application, the design of spacer ring is to provide for a uniform plane of constraint, and thus those skilled in the art can
Know, two stress surfaces up and down of spacer ring in this application all should be planar as far as possible, and be rigidity.First spacer ring 51,
The upper and lower surfaces that the rigidity spacer ring such as the second spacer ring 52, third spacer ring 53 and the 4th spacer ring 54 can equably contact it apply
Pressure prevents wire sealing ring 71, fiber filament sealing ring 72 and graphite-seal ring 73 by axial compressive force and in upper table
Face or lower surface become uneven.
Spacer ring is not provided between wire sealing ring 71 and fiber filament sealing ring 72, which is because, when being under pressure,
Wire sealing ring 71 can be combined as a whole with fiber filament sealing ring 72, integrally play sealing function.If spacer ring is arranged, pressing
Under power effect, wire sealing ring 71 can surround spacer ring with fiber filament sealing ring 72, then just radially can expanded
Sealing, this will necessarily reduce sealing performance.First spacer ring 51, the second spacer ring 52, third spacer ring 53 and the 4th spacer ring 54 are metal
Material, such as aluminium material or iron material matter.When for aluminium material, first spacer ring (51) with a thickness of D1, second spacer ring
(52) with a thickness of D2, and 4mm≤D1≤6mm, 4mm≤D2≤6mm.Preferably, D1 and/or D2 is 5mm.Due to iron material matter
It is harder, so when for iron material matter, 2mm≤D1≤4mm, 2mm≤D2≤4mm, it is preferable that D1 and/or D2 is 3mm.
In the embodiment shown in fig. 11, first axis pressure F is not affected by packing element 101When, each sealing ring 70 is and packing element
10 radial direction is parallel.As shown in Figure 1, packing element 10 is by first axis pressure F1When, shorten in the axial direction and in diameter
It is expanded to direction, then bears the second axial compressive force F everywhere in the lowermost graphite-seal ring 73 again2。
In one embodiment of the application, matrix 108 is graphite packing or carbon fiber packing.Packing (packing) leads to
It is often woven by relatively soft thread, usual sectional area is square or rectangular, circle.In one embodiment, base
The cross section of body 108 is quadrangle, such as square.In other embodiments, the cross section of matrix 108 may be circle.
The application also provides a kind of packer, which has packing element 10 defined by one of above-mentioned technical proposal.
The application also provides a kind of bridge plug, which has packing element 10 defined by one of above-mentioned technical proposal.
So far, although showing those skilled in the art will appreciate that the multiple of the application have been shown and described in detail herein
Example property embodiment still, still can be direct according to present disclosure in the case where not departing from the application spirit and scope
Determine or deduce out many other variations or modifications for meeting the application principle.Therefore, scope of the present application is understood that and recognizes
It is set to and covers all such other variations or modifications.
Claims (10)
1. a kind of packing element (10) including wire sealing ring has centrally located through-hole (103), is located at the through-hole
(103) inner surface (102) at, is located at the packing element at outer surface corresponding with the inner surface (102) (101)
(10) upper end (104) at both ends and lower end (106) and be located at the upper end (104) and the lower end (106) it
Between middle part (105), the upper end (104) is used to bear first axis pressure in axial direction, the lower end
(106) for bearing second axial compressive force opposite with the first axis pressure along the axial direction；When described first
When axial compressive force is applied to the upper end (104), the upper end (104), middle part (105) and lower end (106) exist
Deformation occurs for radial direction；When second axial compressive force is applied to the lower end (106), the upper end (104), in
Between in the radial direction, deformation occurs portion (105) and lower end (106), which is characterized in that
The hardness of the upper end (104) and lower end (106) is essentially identical, and is all larger than the hardness of the middle part (105),
The middle part (105) includes the more than one wire sealing ring (71) and more than one in axial direction arrangement
Fiber filament sealing ring (72), one of those described wire sealing ring (71) and one of those described fiber filament sealing ring
(72) inconsistent and setting passes through the wire sealing ring (71) and central tube in the lower section of the fiber filament sealing ring (72)
(30) and the friction of casing (40) reduces second axial compressive force to the pressure of the fiber filament sealing ring (72), to reduce
Or prevent the shoulder of the upper end (104)；
The wire sealing ring (71) includes cross one another more one metal wires and each wire bonds together
Colloid；
The fiber filament sealing ring (72) includes cross one another high-temperature and high-presure resistent plurality of fibers silk and by each fiber
The colloid that silk bonds together.
2. packing element (10) according to claim 1, which is characterized in that
It is provided with inconsistent the first spacer ring (51) below one of those described wire sealing ring (71), with the wire
Inconsistent the second spacer ring (52), institute are provided with above an inconsistent fiber filament sealing ring (72) of sealing ring (71)
The hardness for stating the first spacer ring (51) and second spacer ring (52) is all larger than the wire sealing ring (71) and the fiber filament
The hardness of sealing ring (72)；
Also, be not provided between the wire sealing ring (71) and its inconsistent fiber filament sealing ring (72) every
Ring.
3. packing element (10) according to claim 2, which is characterized in that
First spacer ring (51) and second spacer ring (52) are metal material.
4. packing element (10) according to claim 3, which is characterized in that
First spacer ring (51) and second spacer ring (52) are aluminium material；
First spacer ring (51) with a thickness of D1, second spacer ring (52) with a thickness of D2, and 4mm≤D1≤6mm,
4mm≤D2≤6mm。
5. packing element (10) according to claim 4, which is characterized in that
First spacer ring (51) with a thickness of 5mm.
6. packing element (10) according to claim 4, which is characterized in that
Second spacer ring (52) with a thickness of 5mm.
7. packing element (10) according to claim 3, which is characterized in that
First spacer ring (51) and second spacer ring (52) are iron material matter；
First spacer ring (51) with a thickness of D1, second spacer ring (52) with a thickness of D2, and 2mm≤D1≤4mm,
2mm≤D2≤4mm。
8. packing element (10) according to claim 7, which is characterized in that
The thickness of first spacer ring (51) and second spacer ring (52) is 3mm.
9. a kind of packer, which is characterized in that including packing element (10) described in one of claim 1-8.
10. a kind of bridge plug, which is characterized in that including packing element (10) described in one of claim 1-8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610700678.XA CN106089146B (en) | 2016-08-22 | 2016-08-22 | Packing element, packer and bridge plug including wire sealing ring |
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| CN201610700678.XA CN106089146B (en) | 2016-08-22 | 2016-08-22 | Packing element, packer and bridge plug including wire sealing ring |
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| CN106089146B true CN106089146B (en) | 2019-06-18 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106121582B (en) * | 2016-08-22 | 2019-05-03 | 天鼎联创密封技术（北京）有限公司 | Both ends are packing element, packer and the bridge plug of hard sealing ring |
| CN106639964A (en) * | 2017-03-10 | 2017-05-10 | 西南石油大学 | High leakproofness shoulder-protrusion resistant compression type packer |
| CN107630676B (en) * | 2017-08-18 | 2020-07-10 | 中国石油天然气股份有限公司 | Surface treatment method of soluble fracturing bridge plug and soluble bridge plug |
| CN115234192A (en) * | 2022-08-29 | 2022-10-25 | 承德石油高等专科学校 | Flexible packer suitable for directional well |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5775429A (en) * | 1997-02-03 | 1998-07-07 | Pes, Inc. | Downhole packer |
| CN2854227Y (en) * | 2005-12-23 | 2007-01-03 | 梁海亮 | High strength ceramic fibre seal packing |
| CN203905890U (en) * | 2013-10-28 | 2014-10-29 | 四机赛瓦石油钻采设备有限公司 | High temperature and high pressure resistant ultra-pound class compressive seal assembly suitable for casing pipe and uncased hole |
| CN105298434A (en) * | 2015-11-23 | 2016-02-03 | 天鼎联创密封技术（北京）有限公司 | Rubber barrel capable of resisting high-temperature steam, compressed type packer and sealing method |
| CN105863553A (en) * | 2016-06-20 | 2016-08-17 | 天鼎联创密封技术（北京）有限公司 | Packer element with lower end sealing ring wrapped by two copper sheets, packer and bridge plug |
| CN206071527U (en) * | 2016-08-22 | 2017-04-05 | 天鼎联创密封技术（北京）有限公司 | Packing element, packer and bridging plug including tinsel sealing ring |
-
2016
- 2016-08-22 CN CN201610700678.XA patent/CN106089146B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5775429A (en) * | 1997-02-03 | 1998-07-07 | Pes, Inc. | Downhole packer |
| CN2854227Y (en) * | 2005-12-23 | 2007-01-03 | 梁海亮 | High strength ceramic fibre seal packing |
| CN203905890U (en) * | 2013-10-28 | 2014-10-29 | 四机赛瓦石油钻采设备有限公司 | High temperature and high pressure resistant ultra-pound class compressive seal assembly suitable for casing pipe and uncased hole |
| CN105298434A (en) * | 2015-11-23 | 2016-02-03 | 天鼎联创密封技术（北京）有限公司 | Rubber barrel capable of resisting high-temperature steam, compressed type packer and sealing method |
| CN105863553A (en) * | 2016-06-20 | 2016-08-17 | 天鼎联创密封技术（北京）有限公司 | Packer element with lower end sealing ring wrapped by two copper sheets, packer and bridge plug |
| CN206071527U (en) * | 2016-08-22 | 2017-04-05 | 天鼎联创密封技术（北京）有限公司 | Packing element, packer and bridging plug including tinsel sealing ring |
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| CN106089146A (en) | 2016-11-09 |
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