• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    apparatus and method of sealing to seal a pipe in a well opening and method to form a seal between a first pipe and a second pipe. in one embodiment, a sealing apparatus according to the present invention includes a mandrel having at least two portions, a first portion having a sealing ring disposed on an outer surface and a second portion without a sealing ring disposed on the outer surface . in one embodiment, the seal ring is arranged around the first portion. in another embodiment, the disruption and collapse of the integrity of the first portion is substantially the same as that of the second portion.
    公开号:BR112014027295B1
    申请号:R112014027295-6
    申请日:2013-05-03
    公开日:2020-12-15
    发明作者:George Givens；Rocky A. Turley
    申请人:Weatherford/Lamb, Inc.；
    IPC主号:
    专利说明:

    Background of the Invention Field of the Invention
    [001] The embodiments of the present invention generally relate to a sealing arrangement for a drilled well. More particularly, the embodiments of the present invention relate to a sealing rod arrangement for reconnecting a pipe. Description of the Correlated Technique
    [002] During the life of a well, an operator may decide to reconnect it to a liner. One method is to insert a filament for relinking having a sealing rod at a lower end to establish the pressure integrity with the coating. Figure 1 shows a sealing rod arranged inside a polished well 3 receptacle (polish bore receptacle - PBR) of the liner. The sealing rod includes a mandrel 10 and three sets 11, 12, 13 of Chevron sealing rings arranged over a small diameter portion of the mandrel 10. Each of the sets 11, 12, 13 includes upper and lower travel stoppers 14, 16 attached to the mandrel 10. Two stacks of opposite-faced Chevron sealing rings 21, 23 are arranged between the path stop 14, 16. As shown, a stack of sealing rings 21 oriented in a direction to top and a stack of seal rings 22 oriented in a downward direction are arranged on each side of an O-shaped ring 23. Each stack can include up to twenty seal rings 21, 22 for provide adequate sealing with the PBR. The Chevron sealing rings 21, 22 are oriented in opposite directions to seal pressure differentials in either direction.
    [003] One of the disadvantages of this design is that a small diameter portion 8 is created to accommodate the sealing assemblies 11, 12, 13. The small diameter portion 8 reduces chuck breakage and collapse integrity 10. Another disadvantage is that one or more of the seals can roll off the sealing rod during insertion, removal or circulation.
    [004] Therefore, there is a need for a sealing arrangement that does not compromise the integrity of the sealing rod. There is also a need for a sealing rod to reconnect with the pipeline without the concern of the seal rolling off the sealing rod. Summary of the Invention
    [005] In one embodiment, the sealing apparatus includes a mandrel having at least two portions; a first portion having a sealing ring disposed on an outer surface and a second portion without a sealing ring disposed on an outer surface. In one embodiment, the rupture and collapse integrity of the first portion is substantially the same. In another embodiment, the seal ring is arranged around the first portion.
    [006] In one embodiment, a sealing apparatus for sealing a pipe in a well bore includes a mandrel having a sealing gasket; a sealing ring arranged on the sealing gasket to engage the piping; and one or more sealing bands arranged on the sealing ring. In another embodiment, the pipe comprises a PBR. In yet another embodiment the sealing gasket comprises a groove formed on the outer surface of the mandrel.
    [007] In another embodiment, a method for connecting a pipe to a drilled well includes providing a sealing apparatus having a mandrel having at least two portions, in which the first portion includes a sealing ring disposed on an outer surface and the second portion without the sealing ring disposed on an outer surface, and in which the breaking integrity of the first portion is substantially the same as that of the second portion. In one embodiment the method includes engaging the sealing ring to an inner side of the pipe and redistributing a portion of the sealing ring over a spacing between the mandrel and the pipe.
    [008] In another embodiment, a method for connecting a pipe to a drilled well includes providing a sealing apparatus having a mandrel having a sealing gasket; a sealing ring arranged on the sealing gasket to engage the piping; and one or more sealing bands arranged on the sealing ring. The method also includes engaging the sealing ring in an inner part of the pipe and redistributing a portion of the sealing ring along a spacing between the mandrel and the pipe, thereby forming a seal with the pipe. Brief Description of Drawings
    [009] In order for the characteristics mentioned above to be understood in detail, a more particular description of the invention, briefly summarized here above, can be provided with reference to the realizations, some of which are illustrated in the attached drawings. However, it should be noted here that the attached drawings only illustrate typical realizations of this invention and, therefore, are not considered as limiting its scope, since the invention can admit other equally efficient realizations.
    [010] Figure 1 illustrates a sealing rod with the prior art.
    [011] Figure 2 illustrates an embodiment of a sealing rod.
    [012] Figure 3 shows an enlarged partial view of the sealing rod in Figure 2.
    [013] Figure 4 shows an enlarged view of the sealing rod after being engaged with the piping.
    [014] Figure 5 illustrates an embodiment of a sealing rod.
    [015] Figure 6 shows an enlarged partial view of the sealing rod of the Figure 5.
    [016] Figure 7 illustrates an embodiment of a sealing rod.
    [017] Figure 8 illustrates an enlarged partial view of the sealing rod of Figure 7. Detailed Description of the Preferred Realization
    [018] Generally, the present invention relates to a seal assembly for a drilling tool. The sealing assembly will be described here with reference to a sealing rod for reconnecting to a pipe such as a liner. However, it must be understood that the seal set can also be used with other drilling tools. In addition, the seal assembly can be used on a drilling tool that is disposed inside a coated perforated well or inside an open perforated well.
    [019] In one embodiment, the seal assembly includes a mandrel having one or more grooves formed on an external surface. An extrusion-resistant seal ring is arranged in each of the grooves. The seal ring can be used to form a seal with a pipe in a drilled well.
    [020] Figure 2 illustrates an embodiment of a sealing rod 100. Sealing rod 100 can be a tubing connected to a tubular filament (not shown) such as a tubing filament. In another embodiment, the sealing rod 100 may be somewhat integral with respect to the tubular filament. The sealing rod 100 includes a mandrel 110 and one or more sealing assemblies. The sealing rod 100 can be adapted to form a seal with the tubing in the drilled well. For example, sealing rod 100 can engage precise drill pipe such as a polished well receptacle - PBR. In one embodiment, the precise drill pipe can include a pipe having a machined hole and even a smooth and smooth finish in a predetermined diameter, or both. Although the achievements described below make reference to a polished well receptacle - PBR, it is contemplated that the sealing rod 100 can engage other pipes in the drilled well.
    [021] The sealing rod 100 can include any suitable number of sealing assemblies 120 to create a seal between the mandrel 110 and the polished well receptacle - PBR. Figure 3 is an enlarged view of an exemplary seal assembly 120. The sealing assembly 120 includes a sealing ring 125 arranged in a sealing gasket 130. In one embodiment, the sealing gasket 130 can be a circumference-shaped groove formed on the outer surface of the mandrel 110. Because of the wall thickness of the mandrel 110 on each side of the sealing ring 125 is retained, as indicated by reference number 108, the breaking and / or collapsing properties of the mandrel 110 remain substantially the same. In one embodiment, sealing assemblies 120 can be molded and attached to sealing gasket 120. A connection material, such as glue, fastener or any other fastening means, can optionally be used to secure sealing ring 125 to the gasket seal 130. The connection of seal ring 125 to seal gasket 130 is useful to prevent seal ring 125 from becoming unstable and rubbing out during the movement of sealing rod 100. Seal ring 125 can include an elastomeric material such as polyether acetone - PEEK (polyether ketone - PEEK), polytetrafluoroethylene - PTFE (polytetrafluoroethylene - PTFE), and combinations thereof. In addition, a volume spacing (not shown) can be created between the sealing ring 125 and one side of the sealing gasket 130. The volume spacing is configured to substantially prevent distortion of the sealing ring 125 as per sealing rod 100 is inserted into the polished well receptacle - PBR 162.
    [022] Sealing ring 125 includes one or more anti-extrusion bands, such as a first sealing band 141 (first anti-extrusion band) and a second sealing band 142 (second anti-extrusion band). As shown, the sealing bands 141, 142 are embedded in the sealing ring 125 on an upper corner on each side of the sealing ring 125. In one embodiment, the sealing bands 141, 142 are arranged on an outer circumference of the sealing ring 125. In another embodiment, the sealing bands can be a non-elastomeric anti-extrusion band to withstand high pressures. In yet another embodiment, the sealing bands 141, 142 are springs, such as toroidal coil springs. The sealing bands 141, 142 can be used to limit the extrusion of the sealing ring 125 during expansion of the sealing assembly 120. The sealing bands 141, 142 can also be used to limit the extrusion of the pressure differential applied after the expansion seal assembly 120.
    [023] Figure 4 shows the sealing rod 100 engaged with the polished well receptacle - PBR 162. When the sealing ring 125 initially engages the polished well receptacle - PBR 162, the sealing ring 125 changes its configuration and it occupies a portion of the spacing 145 between the mandrel 110 and the polished well receptacle - PBR 162. As shown in Figure 3, the sealing ring 125 includes a projection for contact with the polished well receptacle - PBR 162. The projection it can have any suitable shape such as an arcuate shape, an outline or a double projection. In one embodiment, the projection has a height above the mandrel 110 that is greater than the spacing distance 145. Engagement with the PBR causes the elastomeric material of the sealing ring 125 to be redistributed along the spacing 145 between the mandrel 110 and the polished well receptacle - PBR 162. Additionally, at least a portion of the anti-extrusion bands 141, 142 is forced in an outward direction in a spacing 145 direction due to redistribution of the seal ring material. In this position, the sealing bands 141, 142 act as barriers to substantially prevent the extrusion of the sealing ring 125 in the spacing 145 in addition to the sealing bands 141, 142. In one embodiment, the sealing bands 141, 142 are springs, such as as toroidal coil springs, which expand radially in an outward direction at spacing 145 due to the redistribution of the elastomeric material. As the springs expand radially in an outward direction, the coils of the springs act as a barrier with respect to the flow of elastomeric material from the sealing ring 125. In this way, the sealing bands 141, 142 on the sealing ring 125 act as anti-extrusion barriers.
    [024] The achievements of the seal assemblies 120 described herein provide several advantages over the prior art. For example, by preventing extrusion of seal ring 125, seal bands 141, 142 retain seal ring 125 in an energized state to create a high pressure seal between seal assembly 120 and well-polished receptacle - PBR 162. In one embodiment, seal assembly 120 can create a high pressure seal at the rate of 12,000 to 14,000 psi. Another potential benefit is that the seal assembly 120 does not require the mandrel 110 to include a small diameter portion to accommodate the seal assembly. As a result, mandrel 110 has a higher break and collapse property.
    [025] Figure 5 illustrates an embodiment of a sealing rod 200. For convenience, components on sealing rod 200 that are similar to components on sealing rod 100 will be identified with the same reference numbers. The sealing rod 200 includes a mandrel 110 and sealing assemblies 120. Each of the sealing assemblies 120 can include the first sealing band 141 (first anti-extrusion band) and the second sealing band 142 (second anti-extrusion band) as it is here described.
    [026] As shown in Figure 5, the sealing rod 200 includes a boss ring 250 disposed adjacent to each end of the seal assemblies 120. The boss ring 250 is configured to bounce (or clean / pass over ) an internal surface 165 of the PBR 162 as the shoulder ring 250 contacts and slides along the internal surface 165 when the sealing rod 200 is inserted into the polished well receptacle - PBR 162.
    [027] As a result, a clean surface is provided for sealing assemblies 120 when sealing rod 100 is engaged with the polished well receptacle - PBR 162. An optional O-shaped ring 245 can be positioned under the cam ring 250. The O-shaped ring, 245 is configured to act as a reinforcement under the cam ring 250. In other words, the O-shaped ring 245 reinforces the cam ring 250 by means of support a portion of the shoulder 250.
    [028] As shown in Figure 6, the shoulder 250 is arranged in a gasket 220. In one embodiment, the gasket 250 can have a groove in the shape of a circumference formed on the outer surface of the mandrel 110. The gasket 250 is shaped in such a way as to provide support for the shoulder 250 as the shoulder 250 cleans the inner surface 165 of the polished well receptacle - PBR 162.
    [029] As shown in Figure 6, a volume spacing 220 is created between the sealing ring 125 and one side of the sealing gasket 130. Generally, the volume spacing 220 is used to substantially prevent distortion of the sealing ring. 125 as the sealing rod 200 is inserted in the PBR 162. The volume spacing 220 is a free space (void, opening, gap) between a portion of the sealing ring 125 and a portion of the sealing gasket 130 before insertion of the sealing rod 200 in the polished well receptacle - PBR 162.
    [030] In other words, during the manufacturing process of the sealing rod 200, the volume spacing 220 is created by positioning the sealing ring 125 inside the sealing gasket 130 in a way that the sealing ring 125 is spaced and spaced from at least one side of the gasket 130. Although the volume spacing 220 in Figure 6 is created by having one side of the gasket 130 arranged in parallel to one side of the gasket 125, the volume spacing 220 can be created in any configuration, such as positioned at an angle, without departing from the principles of the present invention.
    [031] Additionally, the size of the volume spacing 220 may vary depending on the seal gasket configuration 130. In one embodiment, the gasket 130 has 3-5% more volume due to the volume spacing 220 than a gasket of standard seal without volume spacing.
    [032] During the insertion of the sealing rod 200 in the PBR 162, the sealing ring 125 moves until it comes into contact with the inner surface 165 of the polished well receptacle - PBR 162 to create a seal between the sealing rod 200 and the receptacle polished well - PBR 162. As the seal ring 125 contacts the inner surface 165 of the polished well receptacle - PBR 162, the seal ring 125 changes its configuration and occupies a portion of the volume spacing 220.
    [033] In one embodiment, the volume spacing 220 is located on the side of the seal assembly 120 which is the first portion to be in contact with the inner surface 165 of the polished well receptacle - PBR 162. The location of the spacing of volume 220 in the seal assembly 120 allows the seal ring 125 to change position (or reconfiguration) within the seal gasket 130 during the insertion operation. In addition, the volume of the volume spacing 220 may change during the insertion operation.
    [034] Figure 7 illustrates an embodiment of a sealing rod 300. For convenience, the components on the sealing rod 300 that are similar to the components on the sealing rod 100, 200 will be identified with the same reference numbers.
    [035] As shown, the sealing rod 300 includes multiple sets of seal sets 120 on mandrel 110. Each set includes two sets of seal 120. However, it should be understood that each set can include any number of seal assemblies without departing from the principles of the present invention.
    [036] Figure 8 illustrates an enlarged partial view of the sealing rod 300 of Figure 7. As shown, the sealing ring 125 includes one or more anti-extrusion bands, such as the first sealing band 141 (first anti-extrusion band) and the second sealing band 142 (second anti-extrusion band). The sealing strips 141, 142 are embedded in the sealing ring 125 in an upper corner on each side of the sealing ring 125. The sealing ring 125 is arranged in the sealing gasket 130.
    [037] Additionally, the volume spacing 220 can be created between the sealing ring 125 and the side of the sealing gasket 130. The volume spacing is configured to substantially prevent distortion of the sealing ring 125 according to the sealing rod 300 is being inserted into the PBR (not shown).
    [038] Mandrel 110 has a first outer diameter 325 between each of the sets of seal sets 120 and a second outer diameter 310 in seal sets 120. The first outer diameter 325 is smaller than the second outer diameter 310. In in other words, mandrel 110 has a greater wall thickness (refer to reference number 310) in the seal sets 120 when compared to the wall thickness (refer to reference number 325) between each set of sets seal 120. Increased wall thickness in seal assemblies 120 provides support for seal assemblies 120 as sealing rod 300 is being inserted into the PBR (not shown) Additionally, increased wall thickness in seal assemblies 120 minimizes the spacing (reference number 145 in Figure 4) between mandrel 110 and PBR.
    [039] As a result, a smaller spacing can be used to limit the extrusion of the sealing ring 125 as the sealing rod 300 is being inserted into the PBR. The smaller spacing can also be used to limit the extrusion of seal ring 125 when seal sets 120 are subjected to a high pressure differential after seal rod 300 has been inserted into the PBR. In other words, the seal assemblies 120 will be able to withstand a higher pressure differential above and / or below the seal assemblies 120 with the smaller volume spacing, as described here, when compared to the seal assemblies that do not have the shorter spacing.
    [040] Additionally, the smaller diameter 325 between each of the sets of sealing assemblies 120 increases the gap between the sealing rod 300 and the PBR over a substantial portion of the sealing rod 300. The increased gap between the sealing rod 300 seal 300 and the PBR minimizes the risk of the seal rod 300 being stuck (or paralyzed) when the seal rod 300 is being inserted into the PBR.
    [041] In one embodiment the sealing apparatus includes a mandrel having at least two portions, a first portion having a sealing ring disposed on an outer surface and a second portion without a sealing ring disposed on an outer surface. In one embodiment, the seal ring is arranged around the first portion. In another embodiment, the break and / or collapse integrity of the first portion is substantially the same as that of the second portion.
    [042] In one embodiment, a sealing apparatus for sealing a pipe in a drilled well includes a mandrel having a sealing gasket; a sealing ring disposed on the sealing gasket for engaging the tubing, in which a mandrel wall thickness on one side of the gasket is substantially the same; and one or more sealing bands arranged on the sealing ring.
    [043] In another embodiment, the tubing comprises a polished well receptacle - PBR. In yet another embodiment, the sealing gasket comprises a groove formed on an external surface of the mandrel. In yet another embodiment, in which the mandrel includes two gaskets, and a wall thickness of the mandrel in one of the gaskets is less than the wall thickness between the two gaskets.
    [044] While the above is directed to embodiments of the present invention, further additional embodiments of the invention can be developed without departing from its basic scope, and the scope of the same is determined by the following claims.
    权利要求:
    Claims (27)
    [0001]
    1. Sealing apparatus for sealing a pipe in a well opening, characterized by the fact that it comprises a mandrel (110) having at least two portions, wherein a first portion includes a sealing ring (125) disposed on an outer surface and a second portion without a sealing ring (125) disposed on the outer surface, in which sealing ring (125) is arranged in a sealing gasket (130) of the first portion, a first sealing band (141) is incorporated in the sealing ring (125), the first band is inside the sealing gasket (130) of the first portion and at least a portion of the first band and a portion of the sealing ring (125) are outside the gasket in a second position .
    [0002]
    2. Sealing apparatus according to claim 1, characterized in that the sealing ring (125) is arranged around the first portion.
    [0003]
    Sealing apparatus according to claim 1, characterized by the fact that the pipe comprises a polished hole receptacle (PBR).
    [0004]
    4. Sealing apparatus according to claim 1, characterized in that the first sealing band (141) is a spring.
    [0005]
    5. Sealing apparatus according to claim 1, characterized in that the first sealing strip (141) comprises an anti-extrusion non-elastomeric strip.
    [0006]
    6. Sealing apparatus according to claim 1, characterized in that the sealing ring (125) includes a projection for contacting the pipe.
    [0007]
    7. Sealing apparatus according to claim 6, characterized in that it additionally comprises a second band incorporated in the sealing ring, in which the projection is between the first band and the second band.
    [0008]
    8. Sealing apparatus according to claim 1, characterized in that the first band moves from the first position to the second position when the sealing ring (125) is redistributed in a space between the mandrel (110) and the pipe.
    [0009]
    Sealing apparatus according to claim 1, characterized in that a disruption of the integrity of the first portion is substantially the same as that of the second portion.
    [0010]
    10. Sealing method for sealing a pipe in a well opening, characterized by the fact that it comprises: providing a sealing apparatus having a mandrel (110) having at least two portions, wherein a first portion includes a sealing ring (125 ) disposed on an outer surface and a second portion without a seal ring (125) disposed on the outer surface, the seal ring (125) is disposed on a seal gasket (130) of the first portion, a first seal band (141) is incorporated in the sealing ring (125), the first band is inside the sealing gasket (130) of the first portion and at least a portion of the first band and a portion of the sealing ring (125) are outside the gasket in a second position; engaging the sealing ring (125) with an inner part of the pipe; and moving the seal ring and band from the first position to the second position by redistributing a portion of the seal ring (125) over a space between the mandrel (110) and the tubing while forcing at least a portion of the band out of the gasket and into the space.
    [0011]
    11. Method according to claim 10, characterized in that the pipe comprises a precise bore pipe.
    [0012]
    12. Sealing method according to claim 11, characterized by the fact that the pipe comprises a polished hole receptacle (PBR).
    [0013]
    13. Sealing method according to claim 10, characterized in that a disruption of the integrity of the first portion is substantially the same as that of the second portion.
    [0014]
    14. Sealing apparatus for sealing a pipe in a well opening, particularly an internal surface of the pipe, characterized by the fact that it comprises: a mandrel (110) having a first groove and a second groove; a sealing ring (125) positioned in the first groove, the sealing ring (125) having one or more anti-extrusion bands incorporated within the sealing ring (125), the sealing ring (125) being configured to engage the internal pipe surface; a cleaning ring disposed in the second groove, the cleaning ring configured to clean the internal surface of the pipe before the sealing ring (125) engages the internal surface of the pipe; and an “O” ring positioned in the second groove between the cleaning ring and a bottom wall of the second groove.
    [0015]
    Sealing apparatus according to claim 14, characterized in that it additionally comprises a defined clearance volume between one side of the first groove and one side of the sealing ring (125), in which the clearance volume is configured to close when the sealing ring (125) engages the inner surface of the pipe.
    [0016]
    16. Sealing apparatus according to claim 15, characterized in that the volume spacing is configured to close when the sealing ring engages / engages with the inner surface of the tubular.
    [0017]
    17. Sealing apparatus according to claim 16, characterized in that the volume spacing is closed by filling the volume spacing with a portion of the sealing ring.
    [0018]
    18. Sealing apparatus according to claim 14, characterized by the fact that the “O” ring is configured to provide support for the cleaning ring.
    [0019]
    19. Sealing apparatus according to claim 14, characterized by the fact that the sealing ring includes a projection / protrusion to contact the inner surface of the tubular.
    [0020]
    20. Sealing apparatus according to claim 19, characterized by the fact that the sealing ring includes two anti-extrusion bands, and the projection / protrusion is arranged between the two anti-extrusion bands.
    [0021]
    21. Method for creating a seal between a first tubular and a second tubular, characterized by the fact that it comprises: positioning a portion of the first tubular inside the second tubular, the first tubular having a sealing ring arranged in a first groove and a wiper ring disposed on an O-shaped ring disposed in a second groove, the seal ring having one or more anti-extrusion bands embedded within the seal ring; cleaning an inner surface of the second tubular as the cleaning ring contacts the inner surface of the second tubular; and creating the seal between the first tubular and the second tubular as the seal ring engages the inner surface of the second tubular.
    [0022]
    22. Method according to claim 21, characterized in that a volume spacing is defined between one side of the first groove and one side of the seal ring.
    [0023]
    23. The method of claim 22, further comprising closing the volume spacing when creating the seal between the first tubular and the second tubular.
    [0024]
    24. Sealing device for sealing against an internal surface of a tubular in a well hole, characterized by the fact that it comprises: a mandrel having a first portion, a second portion, and a Third portion, the second portion disposed between the first portion and the third portion, the second portion having a wall thickness greater than that of the first portion and third portion; a first ring arranged in a first groove formed in the second portion of the mandrel, the first ring having one or more anti-extrusion bands embedded within the first ring, the first ring being configured to engage / engage with the inner surface of the tubular; and a second ring disposed in the second groove formed in the second mandrel portion.
    [0025]
    25. Sealing apparatus according to claim 24, characterized in that a volume spacing is defined between one side of the first groove and one side of the first ring, and in which the volume spacing is configured to close when the first ring engages / fits with the inner surface of the tubular.
    [0026]
    26. Sealing apparatus according to claim 24, additionally comprising an O-shaped ring disposed between the second ring and a lower surface of the second groove, characterized in that the second ring is configured to clean the internal surface of the tubular.
    [0027]
    27. Sealing apparatus according to claim 24, characterized in that the second ring includes one or more anti-extrusion bands embedded with the second ring, and the second ring is configured to engage / engage with the inner surface of the tubular.
    类似技术:
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    BR102014027278A2|2016-10-18|pipe connection and sealing system and method
    同族专利:
    公开号 | 公开日
    AU2013256104A1|2014-11-20|
    AU2017203056A1|2017-06-01|
    BR112014027295A2|2017-06-27|
    CA2872152A1|2013-11-07|
    AU2013256104B2|2017-02-16|
    WO2013166359A2|2013-11-07|
    AU2018256535B2|2019-08-29|
    AU2017203056B2|2018-11-29|
    US9260926B2|2016-02-16|
    AU2018256535A1|2018-11-22|
    US20130292138A1|2013-11-07|
    PL2844824T3|2020-08-24|
    WO2013166359A3|2014-04-10|
    EP2844824B1|2020-03-18|
    CA2872152C|2016-12-06|
    EP3660262A1|2020-06-03|
    EP2844824A2|2015-03-11|
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    法律状态:
    2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2020-01-21| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2020-08-04| B06G| Technical and formal requirements: other requirements|Free format text: O REQUERENTE APRESENTOU QUADRO REIVINDICATORIO COM 18 REIVINDICACOES CONFORME QUADRO APRESENTADO ANTES DO PEDIDO DE EXAME NA PETICAO 870160017028 DE 02/05/2016. EM RESPOSTA AO DESPACHO 6.21 NA PETICAO 870200047452 DE 15/04/2020 APRESENTOU QUADRO REIVINDICATORIO COM 27 REIVINDICACOES. ATRAVES DA PETICAO 800160119061 DE 03/05/2016 FOI PAGO O PEDIDO DE EXAME EQUIVALENTE A 18 REIVINDICACOES, COM O VALOR PAGO DE R$ 1690,00 (UM MIL SEISCENTOS E NOVENTA REAIS). ADICIONALMENTE NA PETICAO 870200047452 DE 15/04/2020 APRESENTOU A GRU 29409201917904640 COM COMPLEMENTACAO DO PEDIDO DE EXAME NO VALOR DE R$ 590,00 (QUINHENTOS E NOVENTA REAIS). DESSA FORMA O PEDIDO DE EXAME APRESENTA UM VALOR TOTAL JA PAGO |
    2020-11-10| B09A| Decision: intention to grant|
    2020-12-15| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 03/05/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    2021-04-13| B25A| Requested transfer of rights approved|Owner name: WEATHERFORD TECHNOLOGY HOLDINGS, LLC (US) |
    优先权:
    申请号 | 申请日 | 专利标题
    US201261642340P| true| 2012-05-03|2012-05-03|
    US61/642,340|2012-05-03|
    US13/837,881|2013-03-15|
    US13/837,881|US9260926B2|2012-05-03|2013-03-15|Seal stem|
    PCT/US2013/039417|WO2013166359A2|2012-05-03|2013-05-03|Seal stem|
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