CN105863552A - Rubber barrel with harder upper end part as well as packer and bridge plug - Google Patents
Rubber barrel with harder upper end part as well as packer and bridge plug Download PDFInfo
- Publication number
- CN105863552A CN105863552A CN201610341306.2A CN201610341306A CN105863552A CN 105863552 A CN105863552 A CN 105863552A CN 201610341306 A CN201610341306 A CN 201610341306A CN 105863552 A CN105863552 A CN 105863552A
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- CN
- China
- Prior art keywords
- packing element
- compressive force
- pars intermedia
- sealing ring
- axial compressive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
- E21B33/1216—Anti-extrusion means, e.g. means to prevent cold flow of rubber packing
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/122—Multiple string packers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/134—Bridging plugs
Abstract
The invention relates to the field of sealing, and particularly relates to a rubber barrel with harder upper end part which is used in an oil exploitation industry and can bear a high temperature and a high pressure a packer and a bridge plug. According to one aspect of the invention, the rubber barrel is provided, wherein the hardness of the upper end part of the rubber barrel is more than the hardness of the middle part of the rubber barrel, so that the shape change of the middle part in the radial direction is more than the shape change of the upper end part in the radial direction when the upper end part bears first axial pressure. The hardness of the upper end part is more than the hardness of the middle part, in this way, when the upper end part bears the first axial pressure, the upper end part tends to transfer the first axial pressure to the middle part and a lower end part rather than uses the first axial pressure for self radial deformation. Thus, the middle part and the lower end part can be enabled to generate radial deformation when a smaller first axial pressure is used, so as to achieve the integral sealing of the rubber barrel.
Description
Technical field
The present invention relates to field of sealing technology, particularly relate in a kind of oil exploitation industry use can bear high temperature
Packing element, packer and the bridging plug that the upper end of high pressure is harder.
Background technology
Packer be oil field well recover the oil a kind of key tool, be widely used in oil field dispensing, separate zone stimulation,
The several work such as oil production by layer, mechanical pipe water blockoff, packer needs to carry out the packing of annular space, to realize oil
Gas is layered, and the core component realizing annular space packing is packing element.Bridging plug is also to commonly use in oil extraction operation
A kind of instrument of oil gas layering.The main distinction of packer and bridging plug is, packer is usually in pressure break, acid
Change, temporary transient when looking for the construction of the measure such as leakage stay in well, and bridging plug be when measures such as sealing oil recoveries temporarily or
For good and all stay in well.Packer and central tube stay well simultaneously, and mixing gives up can individually stay well, and bridging plug
It is then individually to stay well.Structurally, packer is hollow structure, can flow freely oil gas water, and bridge
It plug is then solid construction.
Being required for packing element as the instrument of Oil-gas Separation, packer and bridging plug, packing element is as the crucial portion sealed
Part, its quality directly affects packer and the sealing effectiveness of bridging plug and service life, in packer and bridging plug
Play conclusive effect.Packing element typically uses rubber type of material to make, therefore referred to as packing element.But packing element is only
It is the interior technical term arranging to become social custom of a kind of industry, for representing the functional parts playing sealing function, and
Refer not only to packing element to be made by rubber.When packing element bears certain pressure to promote its deformation for sealing
Time, need to consider the deformability of packing element itself, if deformation deficiency can cause it cannot play sealing function；
If deformation is excessive, packing element may be caused to lose efficacy because of conquassation, lose recovery capability.The most important thing is, work as glue
Cylinder in down-hole by high-temperature steam effect time, packing element be more affected by HTHP while effect and lost efficacy
Cause losing recovery capability.
2013 first-phase " oil field equipment " discloses " improvement of packer rubber barrel structure and advantage
Analysis " article, wherein record herein below: " on conventional packer, string has 3 packing elements, be divided into,
In, the lower identical and upper lower rubber cylinder of 3 packing element physical dimensions be long packing element type, middle packing element be 2 kinds of structures of short rubber cylinder
Form.By finding the research of traditional three packing element structures, play main seal effect is upper packing element ".And
And, carry out nonlinear analysis by non linear finite element analysis software Abaqus and draw: " along with axially carrying
Lotus increases, and axial compression amount also increases, and during beginning, decrement increases more apparent, and decrement increase subsequently slows down,
Packing element deformation tends towards stability；Along with the increase of setting force, packing element is gradually increased with casing-contact length.Packing element
Appearance cylinder partial limited radial deformation system, packing element inner surface deformation outward bulge as appearance, when load increases
Added-time packing element is crushed and in last compacting.But owing to structure limits, only going up packing element can be compacted.?
When operating pressure is 30MPa, upper packing element is substantially completely compacted, the slight shoulder of packing element upper end appearance, but not
Occurring packing element to isolate phenomenon, shoulder is within allowed band ".
Above-mentioned prior art only analyzes and packing element applies the first axial compressive force from top to bottom (is equivalent to " axially
Load "), but in actual production process, need that first packing element is applied first axial compressive force and make
Packing element produces and seals；Then packing element can be by the second axial compressive force from bottom to top (thing such as downhole gas
The impact of confrontation packing element) effect.According to the test of inventor, when axial operating pressure is 30MPa
Time, inventor finds that shoulder all can occur in almost all of upper packing element, further applies from bottom to top
During two axial compressive forces (such as 15Ma), all of upper packing element all can produce at shoulder and isolate, and causes close
Envelope lost efficacy.
Summary of the invention
It is an object of the present invention to provide the packing element of a kind of new structure design, prevent packing element from sealing and lose
Effect.
According to an aspect of the present invention, it is provided that a kind of packing element, packing element has and is positioned at the through hole at center, is positioned at
The inner surface of the described through hole outer surface corresponding with described inner surface, lay respectively at described packing element two ends
Upper and lower end and pars intermedia between described upper end and described bottom, described upper end
Portion is for bearing the first axial compressive force in axial direction, and described bottom is used for bearing along described axial direction
Second axial compressive force contrary with described first axial compressive force；When described first axial compressive force puts on described
During upper end, described upper end, pars intermedia and bottom all deform upon in radial direction；When described second
When axial compressive force puts on described bottom, described upper end, pars intermedia and bottom are all sent out in radial direction
Raw deformation, the hardness of described upper end is more than the hardness of described pars intermedia, so that described upper end is born described
During the first axial compressive force, described pars intermedia is more than described upper end in radial direction in the deformation of radial direction
Deformation.
Preferably, the hardness of described bottom is more than the hardness of described pars intermedia, so that described bottom is born
During described second axial compressive force, described pars intermedia is more than described bottom in radial direction side in the deformation of radial direction
To deformation.
Preferably, described upper end is essentially identical with the hardness of described bottom, so that described upper end is born
During described first axial compressive force, described pars intermedia radial direction deformation more than described upper end and described under
End is in the deformation of radial direction, and when described second axial compressive force is born in described bottom, and described centre
Portion is more than the deformation in radial direction of described upper end and described bottom in the deformation of radial direction.
Preferably, described packing element is formed in the arrangement of described axial direction by plural sealing ring.
Preferably, described packing element is formed in the arrangement of described axial direction by two sealing rings, a described sealing
Ring serves as described upper end, and another described sealing ring serves as described bottom and described pars intermedia.
Preferably, described packing element is formed in the arrangement of described axial direction by three sealing rings, three described sealings
Ring each acts as described upper end, described pars intermedia and described bottom.
Preferably, described packing element is formed in the arrangement of described axial direction by the sealing ring of more than three, is distributed in
Two described sealing rings at described axial direction two ends each act as described upper end and described bottom, residue
Described sealing ring serve as described pars intermedia.
Preferably, described sealing ring is respectively provided with colloid and in circular matrix, and described matrix is by intersecting
High temperature high voltage resistant plurality of fibers silk composition, the bonding each described filament of described colloid, and described colloid
It is distributed on the surface of each described matrix so that in the multiple described sealing ring that arranges along described axial direction
Portion and outside form described inner surface and outer surface respectively.
Preferably, described matrix is graphite packing or carbon fiber packing；
Preferably, each described sealing ring all radial direction with described packing element become angle β；
Wherein, 5 °≤β≤45 °.
Preferably, packing element also includes about collar, and described about collar is overall in enlarging shape, the expansion of described about collar
Mouth end is set on described upper end or described bottom, and the necking end of described about collar is away from by described enlarging
Hold sheathed described upper end or described bottom for bearing described first axial compressive force or described second
Axial compressive force.
Preferably, described necking end has inside bevelling.
Preferably, it is that reducing shape comes with described by the sheathed described upper end of described flared end or described bottom
Flared end matches.
Preferably, described about collar is copper, and the maximum gauge of described flared end 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 upper end, the flared end of another described about collar is set on described bottom.
According to another aspect of the present invention, it is provided that a kind of packer, this packer has technique scheme
One of the packing element that limited.
According to a further aspect of the invention, it is provided that a kind of bridging plug, this bridging plug has one of technique scheme
The packing element limited.
The technical scheme that the application provides at least has the following technical effect that
1, according to the technical scheme of the application, the hardness of upper end is more than the hardness of pars intermedia, so in upper end
When portion is by the first axial compressive force, upper end be more this first axial compressive force is passed to pars intermedia and under
End is not for the radial deformation of self.So can be able to allow when using the first less axial compressive force
There is radial deformation in pars intermedia and bottom, thus reaches the sealing that packing element is overall.
2, according to the technical scheme of the application, in the case of the hardness of pars intermedia is constant, the application is by upper end
The hardness in portion is set greater than the hardness of pars intermedia, so in the first axial compressive force effect by formed objects
Time, upper end is less in the deformation of radial direction, it is accordingly required in particular to it is noted that correspondingly upper end is because of radially
The shoulder deformed and formed is the least.Less shoulder can be effectively prevented packing element and isolate, and has reached to prevent
The effect of packing element seal failure.
3, in one embodiment, owing to matrix comprising plurality of fibers silk, when filametntary quantity is more
Sealing ring is partially hard, and when filametntary negligible amounts, sealing ring is the softest, thus can be according to filametntary number
Amount regulates the soft or hard degree of sealing ring, so can directly change packing element by the hardness changing sealing ring
Overall hardness, reaches to increase the purpose of the compression strength scope of packing element.
4, the matrix of the application has cross one another filament, and colloid is by bonding for each filament.When packing element is subject to
When expanding to the first axial compressive force, filament will limit this expansion, thus increases the knot of packing element on the whole
Structure hardness, increases the compression strength of packing element.
5, multiple sealing rings that the application relates to axially arrange, if there being indivedual sealing ring during oil exploitation
Damage, the sealing ring of damage can be replaced by new sealing ring, and remaining sealing ring is no longer changed.So
For on the whole, add the use duration that single sealing ring is average, it is possible to be greatly reduced the use of packing element
Amount, reduces production cost.
6, when the matrix of the application is chosen as packing, the packing of existing high temperature high voltage resistant can be selected, this
Sample, when colloid is combined into as sealing ring with graphite packing or carbon fiber plate root, packing entirety can play props up
Support effect, and colloid can play deformation and seal the effect strengthened.The present invention selects existing packing, and not
With making the special packing as matrix, by increasing capacitance it is possible to increase the flexibility of production.According to the inventors knowledge, existing
Graphite packing and carbon fiber packing can tolerate the effect of HTHP, but graphite packing and carbon fiber plate
The resilience of root is poor.In this application, colloidal dispersions is among packing, after the first axial compressive force disappears
The packing that colloid contributes to being compressed carries out resilience, thus beneficially packing element takes out from down-hole.
7, the matrix of the application all becomes angle with the radial direction of packing element, is so axially pressed by first at packing element
The masterpiece used time, first sealing ring becomes parallel with the radial direction of packing element, and then sealing ring is just carried out radially
Inwardly or outwardly protruding.And in the state that sealing ring is become parallel with radial direction from heeling condition, seal
Ring self can't produce the deformation of radial direction, and simply packing element can produce the deformation of radial direction.So,
As a whole, the deflection of the radial direction of packing element is added, it is possible to overcome packing element harder and radial direction
The defect that deformation is not enough.
Accompanying drawing explanation
Some describing the present invention the most by way of example, and not by way of limitation in detail are concrete
Embodiment.Reference identical in accompanying drawing denotes same or similar parts or part.In accompanying drawing:
Fig. 1 is the compression packer comprising packing element and central tube and the position of sleeve pipe of one embodiment of the invention
Put relation schematic diagram；
Fig. 2 is packing element and central tube and the position relationship schematic diagram of sleeve pipe of one embodiment of the invention, wherein
Illustrate only a part of packing element, central tube and sleeve pipe；
Fig. 3 show the packing element shown in Fig. 2 be applied in the shoulder that produces after the first axial compressive force and central tube and
The position relationship schematic diagram of sleeve pipe, does not applies a second axial pressure to packing element；
Fig. 4 is the structural representation of the packing element of one embodiment of the invention；
Fig. 5 is the structural representation of the sealing ring of one embodiment of the invention；
Fig. 6 is the structural representation of the packing element of another embodiment of the present invention；
Fig. 7 is the structural representation of the packing element of further embodiment of the present invention；
Fig. 8 is that the packing element shown in Fig. 6 and Fig. 7 is by the structural representation after the first axial compressive force compression；
Fig. 9 is the structural representation of the about collar that one embodiment of the invention relates to；
Figure 10 is the structural representation comprising the about packing element of collar of one embodiment of the invention, it illustrates
About collar before compression and the position relationship of packing element other parts；
Figure 11 be in Figure 10 packing element by the structural representation in the first axial compressive force compression process；
Figure 12 is that in Figure 10, packing element, by the structural representation after the first axial compressive force compression, it illustrates compression
After the position relationship of about collar and packing element other parts；
Figure 13 is the structural representation of the packing element of syllogic according to an embodiment of the invention.
Reference in figure is as follows:
10-packing element, 101-outer surface, 102-inner surface, 103-through hole, 104-upper end, 105-bottom,
106-pars intermedia, 107-shoulder；
108-matrix, 109-colloid, 111-sealing ring；
20-about collar, 21-necking end, 22-flared end；
30-central tube；
40-sleeve pipe；
50-rigidity spacer ring；
60-is protruding；
200-compression packer；
A-the first axial direction；
B-the second axial direction；
F1-the first axial compressive force；
F2-the second axial compressive force.
Detailed description of the invention
Direction hereinafter described " on ", D score is all using Fig. 2 as with reference to narration.
Compression packer 200 as shown in Figure 1 has the packing element 10 of the application.Compression packer 200
It is connected on central tube 30 be placed in sleeve pipe 40.Compression packer 200 needs in the wellbore difference
Oil reservoir, water layer separates and bears certain pressure reduction, it is desirable to can descend pit shaft precalculated position, packing is tight,
Can have durability in down-hole again, can trip out smoothly when needing.
As in figure 2 it is shown, packing element 10 is positioned at sleeve pipe 40 and the annular space of central tube 30 composition, rigidity
Spacer ring 50 provides from top to bottom first axial compressive force F of (the i.e. first axial direction A) in the axial direction1,
Rigidity spacer ring 50 can also be removed in other embodiments and by packing element 10 being applied the first axial compressive force F1
Other parts replace.As in figure 2 it is shown, packing element 10 two ends are upper end 104 and bottom 105, in
Between portion 106 between upper end 104 and bottom 105.Upper end 104 is used for bearing in axial direction
The first axial compressive force F1, bottom 105 for bear in axial direction with the first axial compressive force F1On the contrary
The second axial compressive force F2.As a part for packing element 10, upper end 104, bottom 105 and centre
Portion 106 all should have elasticity, explains as one, when the first axial compressive force F1Put on upper end 104
Time, upper end 104, pars intermedia 106 and bottom 105 all deform upon in radial direction；When the second axle
To pressure F2When putting on bottom 105, upper end 104, pars intermedia 106 and bottom 105 are all in footpath
Deform upon to direction.In the embodiment depicted in figure 2, upper end 104 and bottom 105 are respectively provided with hypotenuse,
This hypotenuse can also be not provided with in other embodiments.
In the embodiment shown in fig. 4, packing element 10 generally tubular, packing element 10 has and is positioned at the logical of center
Hole 103, this through hole 103 is limited by inner surface 102 and is formed, and outer surface 101 is positioned at and inner surface 102
The outside of corresponding through hole 103.When the first axial compressive force F1Act on along the first axial direction A
End 104 or the second axial compressive force F2Along the second axial direction B act on bottom 105 time, packing element 10
Entirety will be axially compressed and be radially expanded and (have identical with " deforming upon in radial direction "
Implication), promote outer surface 101 outwardly convex and inner surface 102 inwardly protruding, but general in sequential
Ground is the first outwardly convex of outer surface 101.Applying the first axial compressive force F1After, inner surface 102 and Fig. 1 and
Central tube 30 in Fig. 2 seals, and outer surface 101 seals with the sleeve pipe 40 in Fig. 1 and Fig. 2.Usually,
Space between inner surface 102 and central tube 30 is less (the most bonded to each other), and outer surface 101 with
Gap between sleeve pipe 40 is relatively big, owing to central tube 30 and sleeve pipe 40 are respectively by inner surface 102 and appearance
The maximum protruding size in face 101 is defined, so causing the degree of outer surface 101 outwardly convex big
In the inwardly protruded degree of inner surface 102.
As it has been described above, upper end 104, bottom 105 and pars intermedia 106 all should have elasticity, but
In Fig. 2 and embodiment illustrated in fig. 4, the hardness of upper end 104 is more than the hardness of pars intermedia 106.More than Suo
The first axial compressive force F is born in end 1041Time, pars intermedia 106 is more than upper end in the deformation of radial direction
104 in the deformation of radial direction.
Owing to the hardness of upper end 104 is more than the hardness of pars intermedia 106, so in upper end 104 by the
One axial compressive force F1Time, upper end 104 is by this first axial compressive force F more1Pass to pars intermedia 106
And bottom 105 is not for the radial deformation of self.So can use the first less axial compressive force
F1Time can allow pars intermedia 106 and bottom 105 that radial deformation occurs, thus reach packing element 10 entirety
Seal.Inventor in experiments it is found that, if the hardness of upper end 104 is not more than the hardness of pars intermedia 106,
Then upper end 104 is by the first axial compressive force F1Time, it is more the radial deformation for self rather than passes
Passing pars intermedia 106 and bottom 105, as shown in Figure 3, upper end 104 can produce the biggest
Shoulder 107.When applying a second axial pressure F again2Time, at upper end 104 meeting shoulder 107 in figure 3
Isolate.
According to the technical scheme of the application, in the case of the hardness of pars intermedia 106 is constant, the application is by upper
The hardness of end 104 is set greater than the hardness of pars intermedia 106, so at the first axle by formed objects
To pressure F1During effect, upper end 104 is less in the deformation of radial direction, it is accordingly required in particular to it is noted that phase
The shoulder 107 answering upper end 104, ground to be formed because of radial deformation is the least.Less shoulder 107 can have
Prevent packing element 10 from isolating to effect, reach to prevent the effect of packing element 10 seal failure.
Owing to the radial direction deformation of upper end 104 is less, it is likely that ground, now upper end 104 is in radial direction
Deformation be not enough to seal sleeve pipe 40 and central tube 30, say, that now upper end 104 will not
Recurrence is to sealing function, and is only the first axial compressive force F that will be subject to1Pass to pars intermedia 106 and lower end
Portion 105, this is a packing element 10 critically important difference with the packing element of prior art of the application.And
And, even if sleeve pipe 40 and central tube 30 are sealed, now upper end relatively greatly by the radial direction deformation of upper end 104
The sealing in portion 104 is the most only that seal this packing element 10 one supplements, and no matter whether upper end 104 plays
Sealing function, upper end 104 hardness is more than the setting of pars intermedia 106 hardness, it is therefore prevented that the mistake of shoulder 107
Packing element 10 that is big and that cause isolates, also can be by the first less axial compressive force F1Packing element 10 is sealed.
According to the technical scheme of the application, in the case of the hardness of pars intermedia 106 is constant, the application is by upper
The hardness of end 104 is set greater than the hardness of pars intermedia 106, but so upper end 104 is at the first axle
To pressure F1May not contact with sleeve pipe 40 and not play sealing function under Zuo Yong.At this kind of special knot
Under structure, when bottom 105 is essentially identical with the hardness of pars intermedia 106, the sealing of the packing element of the application by
Bottom 105 and pars intermedia 106 provide；When bottom 105 is essentially identical with the hardness of upper end 104
Time, the sealing of the packing element of the application is provided by pars intermedia 106.So the packing element 10 of the application is with existing
The packing element of technology is entirely different in the structure sealed.
As a preferred embodiment, when the outer wall of upper end 104 is inconsistent with the inwall of sleeve pipe 40, more excellent
Ground is the inner wall sealing of outer wall and the sleeve pipe 40 of upper end 104, and now the bottom of upper end 104 is substantially etc.
Being covered in the top of pars intermedia 106, upper end 104 and pars intermedia 106 are substantially not present radial direction side area
Difference upwards, downward compresses effect it is thus possible to produce pars intermedia 106 and junction, upper end 104,
Prevent or reduce pars intermedia 106, with junction, upper end 104, shoulder occurs.
If in order to reach " to be by this first axial compressive force F more as above1Pass to pars intermedia 106
And bottom 105 is not for the radial deformation of self " and upper end 104 do not produce the effect of shoulder 107,
The metal derby not with deformation, such as iron block can be used.If but the diameter of metal derby is less, then with metal derby
The pars intermedia 106 of contact can produce bigger shoulder 107, if being relatively large in diameter of metal derby, then considers set
The bending situation of pipe 40, metal derby is difficult to slide into suitable position in sleeve pipe 40, and if sleeve pipe 40
The metal derby that interior entrance foreign matter is the biggest is not easy to detach in sleeve pipe.On the other hand, lifting force is less
Then can not be detached in sleeve pipe 40 by metal derby, lifting force is relatively big then may damage sleeve pipe 40.Consider,
Upper end 104 used in this application has elasticity, but is defined the elasticity of upper end 104, i.e. goes up
The hardness of end 104 is more than the hardness of pars intermedia 106, and the diameter that such upper end 104 can be done is less,
Conveniently can be identical with the diameter of pars intermedia 106 at set in-pipe, such as upper end 104.Due to upper end
Portion 104 is harder, and the shoulder 107 himself not being easily formed shoulder 107 or formation is less, due in compression
Time upper end 104 deform upon in radial direction gradually extensional, reduce upper end 104 and sleeve pipe
Space between 40, thus reduce or prevent the formation of shoulder and the size of formation of pars intermedia 106.
In one embodiment, the hardness of bottom 105 is more than the hardness of pars intermedia 106, so that bottom
105 bear the second axial compressive force F2Time, pars intermedia 106 exists more than bottom 105 in the deformation of radial direction
The deformation of radial direction.Based on same principle, such structure is prevented from bottom 105 and is bearing
One axial compressive force F1Or the second axial compressive force F2Time produce shoulder, and the feelings of shoulder can produced
Condition gets off to prevent bottom 105 from bearing the second axial compressive force F further2Shi Zaocheng shoulder becomes big, thus anti-
Only bottom 105 is isolated and is caused packing element 10 seal failure.
In another embodiment, upper end 104 is essentially identical with the hardness of bottom 105, say, that
The hardness of upper end 104 and bottom 105 is all higher than the hardness of pars intermedia 106, the most no matter by first
Axial compressive force F1Or the second axial compressive force F2Time, the deformation of pars intermedia 106 be all higher than upper end 104 with
Bottom 105.Such structure can make pars intermedia 106 quickly reach sealing state, and prevents upper end
There is shoulder or the shoulder preventing upper end 104 and bottom 105 from having produced in portion 104 and bottom 105
Sudden change is big.
As shown in Figure 2, Figure 3 and Figure 4 in embodiment, packing element 10 is by upper end 104, bottom 105 and
Pars intermedia 106 3 part forms, and three sealing rings 111 each act as upper end 104, bottom 105 and
Pars intermedia 106.In Fig. 6, Fig. 7 and embodiment illustrated in fig. 8, packing element 10 is by 11 sealing rings 111
Composition, wherein sealing ring 111 topmost serves as upper end 104, under the sealing ring 111 of bottom serves as
End 105, remaining 9 sealing ring 111 serves as pars intermedia 106.In other embodiments, in composition
Between the sealing ring 111 in portion 106 can also be other quantity.Returning to Fig. 2, Fig. 3 and Fig. 4, packing element 10 is also
Can only have two sealing rings 111 to form, one of them sealing ring 111 serves as upper end 104, another
Sealing ring 111 serves as bottom 105 and pars intermedia 106.
Come specifically to describe shape and the structure of sealing ring 111 below.
Inventor finds, owing to the soft or hard of packing element 10 is variant, such as, polyether-ether-ketone and the packing element made
10 is harder, reaches to set the first axial compressive force F of needs1Relatively big first axial in nominal amount in other words
Pressure F1Lower rubber cylinder 10 deforms deficiency, causes packing element 10 cannot play sealing function.When using softer glue
When system becomes packing element 10, this packing element can be because of the first axial compressive force F that cannot sustain nominal amount1And pressed
Burst or i.e. allow to sustain the first axial compressive force F1But it is being subsequently subjected to the second axial compressive force F2Time packing element
Also can be by conquassation.
Inventor is during solution packing element 10 is softer, and once adulterated in colloid multiple resistance to height being separated from each other
The filament of temperature high pressure, 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 filament of doping is each connected with colloid, but each fiber
Substantially it is not connected between Si or connects less, so the hardness of packing element 10 can only the most limitedly be increased.Institute
With, inventor devises following technical scheme: use cross one another plurality of fibers silk to form a matrix
108, and make colloid 109 be distributed on the surface of matrix 108 and bonding each filament is to form sealing ring 111,
The sealing ring 111 of this spline structure has the ductility in radial direction, in other words, owing to each filament is mutual
Tied up in knots and make sealing ring 111 can within the specific limits diameter become not rupture (mainly fine
The fracture of dimension silk), during sealing ring 111 diameter becomes greatly, cross one another filament will offset one
Part promotes the first axial compressive force F that the change of its diameter is big1, thus to make the diameter of sealing ring 111 increase
To a certain extent, it is desirable to provide the first bigger axial compressive force F1.Especially, colloid 109 is by each intersection
Filament links together tightly, to make the diameter of sealing ring 111 increase to a certain degree, just needs
The first axial compressive force F that will be bigger1.For conclusion, each filament intersects to form a resistance, colloid 109
Forming again a resistance by bonding for each filament, under the effect of the two resistance, packing element 10 is overall
Relatively difficult compression, it is hardening that this is equivalent to packing element 10.Filametntary when in the certain volume of sealing ring 111
When quantity is roughly the same, inventor finds to adjust cross one another fibre by changing the thickness of sealing ring
The quantity of dimension silk, and then the first axial compressive force F needed for adjusting1Size be i.e. applied to the seat of packing element 10
The size of envelope power.Likewise it is possible to by the filametntary quantity in the certain volume of increase sealing ring 111
Adjust cross one another filametntary quantity, and then also can adjust the first required axial compressive force F1Big
Little.The upper end 104 that above two mode makes, all can make the hardness of upper end 104 more than pars intermedia
The hardness of 106.
As it is shown in figure 5, sealing ring 111 includes matrix 108 and colloid 109 two parts.Fig. 5 only finishes
Clear needs on structure, and illustrate only the colloid 109 being coated on matrix 108 all surface, such as, when
When the cross section of matrix 108 is circular, the colloid 109 in Fig. 5 is positioned on the circumference of matrix 108.Fig. 5
Colloid 109 within not shown infiltration matrix 108.Matrix 108 is gathered by the filament of many high temperature high voltage resistants
Conjunction forms, and such as filament can be the material of other high temperature high voltage resistant such as glass fibre or carbon fiber.?
In one embodiment, each filament longitude and latitude is woven together and forms matrix 108, is embodiment at other
In each filament can also otherwise be woven together and form matrix 108.
By narration above, in the technical scheme of the application, this filament is not necessarily needed to have
Flexible, this is owing to contraction and the expansion of packing element 10 are completed by colloid 109.Mentioned above, colloid
On 109 surfaces being distributed in each matrix 108 and internal and by bonding for each filament.It is desired that glue
The bonding every filament of body 109, and each filament is bonded together across.
Seeing Fig. 4, Fig. 5 and Fig. 6, two ends 104,105 of packing element 10 can be by colloid 109
Levelling.Each sealing ring 111 extends in circular and along packing element 10 axial direction on the whole.When adjacent base
The thickness phase of the colloid 109 between body 108 meanwhile, it is capable to make as much as possible packing element 10 in equal area
Interior hardness is essentially identical, prevents packing element 10 unbalance stress from locally caving in.But, when such as scheming
Shown in 13, when packing element 10 is syllogic, each section of packing element can be all a single packing element, so
Packing element 10 shown in Figure 13 is equivalent to be spliced in the axial direction by three separate packing elements.
Only with packing element 10 for syllogic as an example, packing element can also have other section to Figure 13 in other embodiments,
Such as two sections or five sections.
Owing to being coated with sealing ring 111 in colloid 109, the matrix 108 of sealing ring 111 has and intersects
Filament, colloid 109 is distributed on the surface of matrix 108 and internal and by bonding for each filament.First,
It is mixed with filament, when packing element 10 is by the first axial compressive force F in colloid 1091Or second axial compressive force F2
And when expanding (inwardly or outwardly), filament will limit this expansion, thus increase packing element 10 on the whole
Structural rigidity, increase packing element 10 compression strength.Especially, during for circular matrix 108, when
Sealing ring 111 is by the first axial compressive force F1Or second axial compressive force F2Time, each sealing ring 111 stress
Ratio is more uniform, it is therefore prevented that the partial collapse of packing element 10.Further, in an embodiment of the application, phase
The thickness of the adjacent colloid 109 between matrix 108 is identical, thus can guarantee that by the first axial compressive force F1
Or second axial compressive force F2Power is handed on by the sealing ring 111 of effect equably, it is therefore prevented that sealing ring 111
Each several part unbalance stress and by conquassation.
Seeing Fig. 6, each sealing ring 111 is each other by the bonding and bonding each sealing ring 111 of colloid 109
The length sum of axial direction equal to the length of through hole 103, thus form multiple seal section.Base in Fig. 5
The thickness of body 108 is 1.8cm-2.5cm, and quantity is 2-12.Matrix 108 in a preferred embodiment
Quantity be 5, the quantity of such sealing ring 111 is also 5.Filametntary a diameter of 7-30 μm,
Thus can have the filament of substantial amounts on a sealing ring 111, packing element 10 can be improved greatly
Hardness.According to the test of inventor, the thickness of matrix 108 is to be advisable less than 2cm.This is because,
Inventor finds, needs to penetrate in matrix 108 glue forming colloid 109 to form sealing ring 111,
But along with the permeating speed increasing glue of matrix 108 thickness will be the most slack-off.Especially when matrix 108
Thickness will be the slowest more than the speed that glue after 2.5cm penetrates into.So, in one embodiment, each base
The thickness of body 108 is 2cm, can also be 1.8cm or 2.5cm in other embodiments.
See Fig. 6, Fig. 7 and Fig. 8, it illustrates by the first axial compressive force F1Time packing element 10 deformation
Journey.From fig. 6, it can be seen that there is colloid 109 between adjacent two matrixes 108, it is not subject at packing element 10
To the first axial compressive force F1Time, matrix 108 all radial direction with packing element 10 become angle β, in figure 6
β is 10 ° of angles.In other embodiments, β can also be 5 ° of angles or 45° angle.The application arranges β
Reason be, and first axial compressive force F by nominal amount overall harder when sealing ring 1111And cause glue
When cylinder 10 deforms deficiency and cannot play sealing function, sealing ring 111 is first from the radial direction side with packing element 10
To becoming angle β to become the radial direction level of sealing ring 111 and packing element 10, and then as shown in Figure 8
Sealing ring like that carries out projection radially again, and such structure can improve the deformation extent of packing element 10.?
In embodiment illustrated in fig. 7, it is not affected by the first axial compressive force F at packing element 101Time, matrix 108 is all and packing element
The radial direction of 10 is parallel.As shown in Figure 8, the packing element 10 shown in Fig. 6 and Fig. 7 is axial by first
Pressure F1Time, all shorten at axial direction, and expand in radial direction, the most again in the lower end of packing element 10
Pressure F is applied a second axial at portion 1052。
In one embodiment of the invention, matrix 108 is graphite packing or carbon fiber packing.Packing
(packing), generally formed by relatively soft thread braiding, usual sectional area be square or rectangular,
Circular.In one embodiment, the cross section of matrix 108 is quadrangle, such as square.Real at other
Executing in example, the cross section of matrix 108 can also be circular.
The about collar 20 of packing element 10 is described in detail below.
With reference to Fig. 9, Figure 10, Figure 11 and Figure 12, as it is shown in figure 9, about collar 20 entirety is enlarging shape,
It has flared end 22 and necking end 21.Seeing Figure 10, the about flared end 22 of collar 20 is set in upper end
In portion 104 and bottom 105, in other embodiments, flared end 22 can also only be set in upper end
On one of 104 and bottom 105, it has mainly depended on that this end prevents in pressure the need of restrained deformation
Compression process deform excessive.In figs. 10-12, the about quantity of collar 20 is two, and one of them is about
The flared end 22 of collar 20 is set in upper end 104, and the flared end 22 of another about collar 20 is set in
On bottom 105.Seeing Figure 11, the about necking end 21 of collar 20 is sheathed upper away from being flared end 22
End 104 or bottom 105 are used for bearing the pressure from axial.In Figure 10 and Figure 11, it is only
The needs of clear in structure and show schematically about collar 20 and the position relationship of packing element 10 other parts, real
On border, about collar 20 is to combine closely in the end with packing element 10, contacts with each other the most between the two.From figure
12 it can be seen that bearing the first axial compressive force F1After, about collar 20 entirety is cylindrically.Further, about
The flared end 22 of collar 20 is essentially identical with the diameter of necking end 21, and both diameters and sleeve pipe 40
Internal diameter identical, now the outer surface 101 of packing element 10 seals with sleeve pipe 40, and the interior table of packing element 10
Face 102 seals with central tube 30.
The about effect of collar 20 is the most extremely important, and this is owing to the sealing ring 111 of the application is equal
Axially arranged, and be also from axial pressure to sealing ring 111 generation effect.So, it is however very well possible to
Ground, the sealing ring 111 being positioned at packing element 10 two ends can be because of the first axial compressive force F1Or second axial compressive force F2's
Act on and contact in advance with central tube 30 and sleeve pipe 40 in radial direction, cause the sealing in the middle part of packing element 10
Ring 111 cannot produce radial protrusion because stress is too small.By about collar 20 in the constraint of end, it is possible to
First the sealing ring 111 making middle part is the most protruding, when the sealing ring 111 at middle part is by central tube 30 and sleeve pipe
After 40 limit, the sealing ring 111 at two ends occur again radial protrusion and band moving constraint set 20 generation Figure 10,
The such deformation of Figure 11 and Figure 12.Or the sealing ring 111 first making middle part is the most protruding, and in this mistake
Cheng Zhong, also there is radial protrusion band moving constraint set 20 generation Figure 10, Tu11He in the sealing ring 111 at two ends
The such deformation of Figure 12.Above two mode is for preventing the two ends projection in advance of packing element 10 from doing
Specialized designs.When the design that about collar 20 is harder with upper end 104 comes across packing element 10 jointly, it is possible to
Pars intermedia 106 is made to carry out preferentially deforming of radial direction without error.
In Figure 10 and embodiment illustrated in fig. 11, the edge of upper end 104 and bottom 105 is through chamfering
Process, adapt with about collar 20, say, that be flared the sheathed upper ends of end 22 104 with under
Match with flared end 22 in reducing shape in end 105.This design of packing element 10 can increase packing element 10
The contact area of end and about collar 20, and the end of this kind of design and the first axial compressive force F1Between
There is angle, thus need the first bigger axial compressive force F1Packing element 10 could be compressed and produce nominal amount
Deformation, a certain degree of setting force increasing needs.As shown in figure 12, when applying the first axial compressive force
F1After, packing element 10 inwardly or outwardly will extend to radial direction, due to the constraint of sleeve pipe 40, the most about
Collar 20 carries out expansion radially, the most about flared end of collar 20 in the range of limiting at sleeve pipe 40
22 by essentially identical with the diameter of packing element 10, and the most essentially identical with the internal diameter of sleeve pipe 40.Such as Figure 11 institute
Show, in compression process, projection can be formed, Figure 11 schematically illustrates a projection 60, in reality
During the compression of border, outer surface 101 entirety of packing element 10 expands outwardly as projection, and simply the application is at one
The protruding speed at the middle part of packing element 10 is deliberately faster than its two ends by the design of about collar 20 by embodiment
Protruding speed.Very important, if about collar 20 is chosen as the material of difficult deformation, then such as Figure 11
As Suo Shi, when continuing compression, protruding 60 will contact with the top edge of about collar 20, and the most right
Protruding 60 cause shearing, have impact on the sealing of packing element 10.The most about collar is chosen as copper sheathing, and
And determine the maximum gauge of flared end 22 less than 2mm in upper thickness limit, flared end 22 refers to such as Fig. 9
In whole trumpet-shaped edge, rather than that end face of the rightmost side in Fig. 9.Such restriction enables to about
Collar 20 will not cause damage to protruding 60, or damage is the slightest.And it is also beneficial to compressed
Cheng Zhong, about collar 20 is deformed and becomes as shown in Figure 12 by sleeve pipe 40.Based on same
Reason, can not use the about collar 20 of perpendicular type as shown in fig. 12, otherwise before compression
During compression, about collar 20 also can be to gradually protruding outer surface 101 generation shearing to packing element 10
Generation is isolated.In this application, about collar 20 is bell mouth shape, during compression, and about collar 20
It is that a kind of face contacts rather than linear contact lay with protruding 60, greatly reduces the possibility of protruding 60 damages.And such as
Shown in Fig. 9, necking end 21 has inside bevelling, and when compression, bevelling will be around central tube 30, and
Bevelling receives the first axial compressive force F1, such it is designed to make wedging ring 20 in an orderly manner, gradually become
Shape, will not be by the first axial compressive force F1Suddenly conquassation.The application selects another that about collar 20 is copper sheathing
Major reason is, so when being tripped out from down-hole by packer 200, copper sheathing is easily deformed, and will not be stuck in
Between sleeve pipe 40.Based on same reason, it is also possible to select same yielding silver as about collar.
The present invention also provides for a kind of packer, and this packer has the packing element that one of technique scheme is limited
10。
The present invention also provides for a kind of bridging plug, and this bridging plug has the packing element 10 that one of technique scheme is limited.
So far, although those skilled in the art will appreciate that and the most detailed illustrate and describing the application's
Multiple exemplary embodiments, but, in the case of without departing from the application spirit and scope, still can be according to this
Application disclosure directly determines or derives other variations or modifications of many meeting the application principle.Cause
This, scope of the present application is it is understood that and regard as covering other variations or modifications all these.
Claims (10)
1. a packing element (10), has and is positioned at the through hole (103) at center, is positioned at described through hole (103)
Inner surface (102) outer surface (101) corresponding with described inner surface (102) at place, respectively position
In the upper end (104) at described packing element (10) two ends and bottom (105) and be positioned at described upper end
(104) pars intermedia (106) and between described bottom (105), described upper end (104) are used for
Bearing the first axial compressive force in axial direction, described bottom (105) are used for bearing along described axial side
To second axial compressive force contrary with described first axial compressive force；When described first axial compressive force puts on institute
When stating upper end (104), described upper end (104), pars intermedia (106) and bottom (105) are equal
Deform upon in radial direction；When described second axial compressive force puts on described bottom (105), institute
State upper end (104), pars intermedia (106) and bottom (105) all in described radial direction generation shape
Become, it is characterised in that
The hardness of described upper end (104) is more than the hardness of described pars intermedia (106), so that described upper end
When described first axial compressive force is born in portion (104), described pars intermedia (106) is big in the deformation of radial direction
In described upper end (104) in the deformation of radial direction.
Packing element the most according to claim 1 (10), it is characterised in that
The hardness of described bottom (105) is more than the hardness of described pars intermedia (106), so that described lower end
When described second axial compressive force is born in portion (105), described pars intermedia (106) is big in the deformation of radial direction
In described bottom (105) in the deformation of radial direction.
Packing element the most according to claim 1 (10), it is characterised in that
Described upper end (104) is essentially identical with the hardness of described bottom (105), so that described upper end
When described first axial compressive force is born in portion (104), described pars intermedia (106) is big in the deformation of radial direction
In described upper end (104) and described bottom (105) in the deformation of radial direction, and described lower end
When described second axial compressive force is born in portion (105), described pars intermedia (106) is big in the deformation of radial direction
In described upper end (104) and described bottom (105) in the deformation of radial direction.
Packing element the most according to claim 1 (10), it is characterised in that
Described packing element (10) is formed in the arrangement of described axial direction by plural sealing ring (111).
Packing element the most according to claim 4 (10), it is characterised in that
Described packing element (10) is formed in the arrangement of described axial direction by two described sealing rings (111), one
Described sealing ring (111) serves as described upper end (104), and another described sealing ring (111) serves as
Described bottom (105) and described pars intermedia (106)；Or
Described packing element (10) is formed, described in three in the arrangement of described axial direction by three sealing rings (111)
Sealing ring (111) each acts as described upper end (104), described pars intermedia (106) and described lower end
Portion (105)；Or
Described packing element (10) is formed in the arrangement of described axial direction by the sealing ring (111) of more than three, point
Two the described sealing rings (111) being distributed in described axial direction two ends each act as described upper end (104)
With described bottom (105), remaining described sealing ring (111) serves as described pars intermedia (106).
Packing element the most according to claim 5 (10), it is characterised in that
Described sealing ring (111) is respectively provided with colloid (109) and in circular matrix (108), described base
Body (108) is made up of the plurality of fibers silk of cross one another high temperature high voltage resistant, and described colloid (109) is bonding
Each described filament, and described colloid (109) be distributed on the surface of each described matrix (108) so that
The multiple described sealing ring (111) arranged along described axial direction inside and outside formed respectively described in
Surface (102) and outer surface (101).
Packing element the most according to claim 6 (10), it is characterised in that
Described matrix (108) is graphite packing or carbon fiber packing；
Preferably, each described sealing ring (111) all described radial direction with described packing element (10) become angle
β；
Wherein, 5 °≤β≤45 °.
Packing element the most according to claim 1 (10), it is characterised in that also include:
About collar (20), described about collar (20) is overall in enlarging shape, the expansion of described about collar (20)
Mouth end (22) is set on described upper end (104) or described bottom (105), described about collar (20)
Necking end (21) away under the described upper end (104) or described sheathed by described flared end (22)
End (105) is used for bearing described first axial compressive force or described second axial compressive force；
Preferably, described necking end (21) has inside bevelling；
Preferably, by the sheathed described upper end (104) of described flared end (22) or described bottom (105)
Match with described flared end (22) in reducing shape；
Preferably, described about collar (20) is copper, the maximum gauge of described flared end (22) less than or
Equal to 2mm；
Preferably, the quantity of described about collar (20) is two, one of them described about collar (20)
Flared end (22) is set in described upper end (104), the flared end of another described about collar (20)
(22) it is set on described bottom (105).
9. a packer, it is characterised in that include the packing element (10) that one of claim 1-8 is described.
10. a bridging plug, it is characterised in that include the packing element (10) that one of claim 1-8 is described.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610341306.2A CN105863552B (en) | 2016-05-20 | 2016-05-20 | The harder packing element in upper end, packer and bridge plug |
| CA3023664A CA3023664C (en) | 2016-05-20 | 2017-05-12 | Rubber cylinder having higher hardness in upper end portion, packer, and bridge plug |
| US16/301,727 US20190264531A1 (en) | 2016-05-20 | 2017-05-12 | Rubber cylinder having higher hardness in upper end portion, packer, and bridge plug |
| PCT/CN2017/084210 WO2017198121A1 (en) | 2016-05-20 | 2017-05-12 | Rubber cylinder having higher stiffness in upper end portion, packer, and bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610341306.2A CN105863552B (en) | 2016-05-20 | 2016-05-20 | The harder packing element in upper end, packer and bridge plug |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105863552A true CN105863552A (en) | 2016-08-17 |
| CN105863552B CN105863552B (en) | 2019-05-03 |
Family
ID=56635540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610341306.2A Active CN105863552B (en) | 2016-05-20 | 2016-05-20 | The harder packing element in upper end, packer and bridge plug |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20190264531A1 (en) |
| CN (1) | CN105863552B (en) |
| CA (1) | CA3023664C (en) |
| WO (1) | WO2017198121A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017198121A1 (en) * | 2016-05-20 | 2017-11-23 | 天鼎联创密封技术（北京）有限公司 | Rubber cylinder having higher stiffness in upper end portion, packer, and bridge plug |
| WO2018036224A1 (en) * | 2016-08-22 | 2018-03-01 | 天鼎联创密封技术（北京）有限公司 | Rubber cylinder with hard sealing rings on both ends, packer and bridge plug |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749640B (en) * | 2020-07-13 | 2022-03-01 | 中国科学技术大学 | Packer, packer machining method and packer setting method |
| CN111894510B (en) * | 2020-08-18 | 2022-03-25 | 西南石油大学 | Combined rubber-cylinder type two-stage ultrahigh pressure sealing packer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5165703A (en) * | 1991-03-20 | 1992-11-24 | Oem Components, Inc. | Anti-extrusion centering seals and packings |
| US6712153B2 (en) * | 2001-06-27 | 2004-03-30 | Weatherford/Lamb, Inc. | Resin impregnated continuous fiber plug with non-metallic element system |
| CN2557691Y (en) * | 2002-07-18 | 2003-06-25 | 阜新市石油工具厂 | Fishable high pressure bridge plug |
| CN2599219Y (en) * | 2003-02-18 | 2004-01-14 | 克拉玛依采油工艺研究院 | Drilling type packer with hydraulic cylinder |
| US7331581B2 (en) * | 2005-03-30 | 2008-02-19 | Schlumberger Technology Corporation | Inflatable packers |
| US7441605B2 (en) * | 2005-07-13 | 2008-10-28 | Baker Hughes Incorporated | Optical sensor use in alternate path gravel packing with integral zonal isolation |
| CN101319603A (en) * | 2008-07-23 | 2008-12-10 | 姚洪全 | High-strength sealing steam injection packer |
| CN201730586U (en) * | 2010-07-26 | 2011-02-02 | 于成龙 | Four-rubber cylinder compression packer |
| CN102287161A (en) * | 2011-07-25 | 2011-12-21 | 上海道氟化工科技有限公司 | Compression packer rubber cylinder, and preparation method and application thereof |
| CN102505927A (en) * | 2011-12-16 | 2012-06-20 | 中国石油天然气股份有限公司 | Metal wrapped-type high-temperature sealing structure and manufacturing method thereof |
| CN202970610U (en) * | 2012-12-14 | 2013-06-05 | 中国石油集团川庆钻探工程有限公司 | Oil and gas well underground casing pipe packer rubber sleeve |
| GB2513851A (en) * | 2013-05-03 | 2014-11-12 | Tendeka Bv | A packer and associated methods, seal ring and fixing ring |
| US10001214B2 (en) * | 2013-11-26 | 2018-06-19 | Baker Hughes, A Ge Company, Llc | Seal arrangement and method of sealing |
| CN104389546A (en) * | 2014-11-26 | 2015-03-04 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Compressed packer rubber barrel with spacer ring combined spring shoulder pad |
| CN105545244B (en) * | 2016-01-21 | 2019-04-02 | 天鼎联创密封技术（北京）有限公司 | The packing element and compression packer of carbon fiber oxidization fiber |
| CN105781482B (en) * | 2016-05-20 | 2019-04-02 | 天鼎联创密封技术（北京）有限公司 | The harder packing element of upper and lower end parts, packer and bridge plug |
| CN105863552B (en) * | 2016-05-20 | 2019-05-03 | 天鼎联创密封技术（北京）有限公司 | The harder packing element in upper end, packer and bridge plug |
| CN205778712U (en) * | 2016-05-20 | 2016-12-07 | 天鼎联创密封技术（北京）有限公司 | Packing element, packer and the bridging plug that upper and lower end parts is harder |
| CN205714080U (en) * | 2016-05-20 | 2016-11-23 | 天鼎联创密封技术（北京）有限公司 | Packing element, packer and the bridging plug that upper end is harder |
-
2016
- 2016-05-20 CN CN201610341306.2A patent/CN105863552B/en active Active
-
2017
- 2017-05-12 US US16/301,727 patent/US20190264531A1/en not_active Abandoned
- 2017-05-12 CA CA3023664A patent/CA3023664C/en active Active
- 2017-05-12 WO PCT/CN2017/084210 patent/WO2017198121A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017198121A1 (en) * | 2016-05-20 | 2017-11-23 | 天鼎联创密封技术（北京）有限公司 | Rubber cylinder having higher stiffness in upper end portion, packer, and bridge plug |
| WO2018036224A1 (en) * | 2016-08-22 | 2018-03-01 | 天鼎联创密封技术（北京）有限公司 | Rubber cylinder with hard sealing rings on both ends, packer and bridge plug |
| US10837257B2 (en) | 2016-08-22 | 2020-11-17 | Tianding Sealing Technology (Beijing) Co., Ltd. | Rubber cylinder with rigid seal rings on both ends, packer, and bridge plug |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105863552B (en) | 2019-05-03 |
| US20190264531A1 (en) | 2019-08-29 |
| WO2017198121A1 (en) | 2017-11-23 |
| CA3023664A1 (en) | 2017-11-23 |
| CA3023664C (en) | 2020-08-18 |
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