BRPI1103520A2 - tx type metal seal - Google Patents
tx type metal seal Download PDFInfo
- Publication number
- BRPI1103520A2 BRPI1103520A2 BRPI1103520-0A BRPI1103520A BRPI1103520A2 BR PI1103520 A2 BRPI1103520 A2 BR PI1103520A2 BR PI1103520 A BRPI1103520 A BR PI1103520A BR PI1103520 A2 BRPI1103520 A2 BR PI1103520A2
- Authority
- BR
- Brazil
- Prior art keywords
- sealing
- seal
- metal
- ring
- circular
- Prior art date
Links
- 239000002184 metal Substances 0.000 title claims abstract description 30
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000005260 corrosion Methods 0.000 claims abstract description 16
- 230000007797 corrosion Effects 0.000 claims abstract description 16
- 230000008021 deposition Effects 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 56
- 229910045601 alloy Inorganic materials 0.000 description 8
- 239000000956 alloy Substances 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000000151 deposition Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
- F16J15/0881—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing the sealing effect being obtained by plastic deformation of the packing
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Engineering & Computer Science (AREA)
- Gasket Seals (AREA)
- Sealing Devices (AREA)
Abstract
VEDAÇçO METÁLICA DO TIPO TX. Refere-se a uma vedação (4) metal contra metal do tipo TX que veda contra as sedes (6) fabricadas pela deposição de material com alta resistência a corrosão, pertencentes às duas peças circulares (1 e 2) definidas pela linha de centro (5) firmemente unidas pela conexão (3) metálicas que torqueada energiza a superfície (9) produzindo a vedação nessa região.TX TYPE METAL SEAL. Refers to a TX-to-metal metal-to-metal seal (4) that seals against seats (6) made by the deposition of material with high corrosion resistance, belonging to the two circular parts (1 and 2) defined by the centerline ( 5) Tightly joined by the torqued metal connection (3) energizes the surface (9) producing the seal in this region.
Description
VEDAgAo METALICA DO TIPO TX" BREVE APRESENTAQAOTX TYPE METAL SEAL BRIEF PRESENTATION
Trata a presente solicitagao de Patente de Ιηνβηςδο de uma inedita "VEDAQAO METALICA DO TIPO TX" se refere a um anel circular metalico que permite a vedagao diametral metal contra metal entre conexoes que se utilizam de elemento de vedagao resistente a corrosao tanto para altas e/ou baixas pressdes em meios contendo fluidos Iiquidos e/ou gases com aplica^ao direta, mas nao exclusivo em colunas de drill pipe risers, em equipamentos mecanicos para a prospecgao e produgao de petroleo, que requeiram vedagao metalica entre dois componentes. EMBASAMENTOThe present presenteηνβηςδο Patent Application for an original "TX TYPE METAL SEAL" refers to a circular metal ring that allows metal-to-metal diametrical sealing between connections using corrosion-resistant sealing for both high and / or low pressures in media containing liquid fluids and / or gases with direct but not exclusive application to drill pipe risers, mechanical oil drilling and production equipment requiring metal sealing between two components. PACKING
Aneis de vedagao sao comumente empregados para promover a estanqueidade quando da jungao de duas pegas tubulares por meio de algum tipo de conexao mecanica na indiistria de prospecgao e produgao de petroleo. Os modelos de aneis conhecidos no mercado apresentam uma serie de configuragoes, tais como: AX, BX, CX, DX, RX, VX e SBMS.Sealing rings are commonly employed to promote tightness when joining two tubular handles through some kind of mechanical connection in the oil prospecting and production industry. Ring models known in the market feature a number of configurations such as: AX, BX, CX, DX, RX, VX and SBMS.
A maioria destes aneis e posicionada na interface entre as duas pe?as nas quais e requerida a vedagao. A efetivagao da selagem se da pela energiza^ao por algum tipo de conexao mecanica que causa a deformagao do selo metalico contra as superficies de vedagao, desenvolvendo elevadas tensoes de contato que propiciam a vedagao tanto de altas quanto baixas pressoes em meios com fluidos Iiquidos e gases. ESTADO DA TECNICAMost of these rings are positioned at the interface between the two parts at which sealing is required. The sealing is effected by energizing by some kind of mechanical connection that causes the metal seal to deform against the sealing surfaces, developing high contact stresses that allow the sealing of both high and low pressures in liquid and liquid media. gases. TECHNICAL STATE
Atualmente, os aneis de vedagao sao fabricados normalmente em ago de baixo carbono ou de ago carbono de baixa Iiga ou agos resistentes a corrosaoAt present, sealing rings are usually manufactured from low carbon or low alloy carbon or corrosion resistant agents
2525
conhecidos como a?os inoxidaveis ou Iigas resistentes a corrosao a base de niquel (CRA)1 cuja particularidade e ο baixo Iimite de escoamento, que permite a deformidade pldstica durante ο processo de energizagao do anel de maneira a absorver todas as folgas de projeto e as tolerancias de fabricagao de todos os componentes, desenvolvendo elevadas tensoes de contato nas superficies de vedagao.These are known as stainless steels or nickel-based corrosion resistant alloys (CRA) 1, the peculiarity of which is the low flow limit, which allows plastic deformity during the ring energization process to absorb all design clearances and the manufacturing tolerances of all components, developing high contact stresses on the sealing surfaces.
Todas as superficies de vedag§o sao fabricadas com excelente acabamento superficial e todas as tolerancias de fabricagao sSo dimensionadas de forma a obter um funcionamento satisfatorio da veda?ao tanto nas maximas condi?oes de material quanto nas minimas condigoes de material dos componentes da conexao.All sealing surfaces are manufactured with excellent surface finish and all manufacturing tolerances are sized to achieve satisfactory seal operation under both maximum material conditions and minimum material conditions of connection components. .
O selo met^lico do tipo SBMS apresentado na patente n° US 6561521 tern como caracteristica um corpo estrutural fabricado em material que e normalmente de alta resistencia com conceito de vedagao em Iinha com desenvolvimento de altas pressoes nas superficies de contato. Este selo pode opcionalmente ter uma camada de material macio nas regioes de veda^ao. Este conceito de selo meWlico requer materials de alta resistencia no corpo principal da vedagao devido as altas tensoes geradas quando da aplicagao da pressao de trabalho.The SBMS type metal seal disclosed in US Patent No. 6561521 is characterized by a structural body made of a material which is normally of high strength with inline sealing concept with high pressure surface development. This seal may optionally have a layer of soft material in the sealing regions. This medical seal concept requires high strength materials in the main seal body due to the high stresses generated when the working pressure is applied.
SUMARIO DA invenqaoSUMMARY OF THE INVENTION
Trata-se de um element。de vedagao metal contra metal que pode serIt is a metal-to-metal sealing element that can be
utilizado tanto como elemento primario quanto secundario de vedagao, que veda contra as sedes de veda?ao fabricada pela deposigao de material com alta resistencia a corrosao. Opcionalmente, a vedag§o metalica TX pode ser utilizada em conjunto com outro tipo de vedagao que pode preferencialmente ser elastom6rico, mas nao Iimitado a este. O elemento de vedagao proposto permite a sua aplica?ao em ambientes altamente corrosivos envolvendo tanto altas como baixas temperatures e/ ou pressao contendo fluidos Iiquidos e gases.It is used as both a primary and a secondary sealing element, which seals against the sealing seats manufactured by the deposition of material with high corrosion resistance. Optionally, the TX metal seal may be used in conjunction with another type of seal which may preferably be elastomeric but not limited thereto. The proposed sealing element allows its application in highly corrosive environments involving both high and low temperatures and / or pressure containing liquid fluids and gases.
O preserite anel de vedagao e fabricado em ago de baixo carbono ou de ago carbono de baixa Iiga ou a^os resistentes a corrosao conhecidos como agos inoxidaveis ou Iigas resistentes a corrosao a base de niquel (CRA) ou qualquer outro material metalico que permita efetuar a vedagao entre dois componentes mecanicos que normalmente sao tubulares e de grande aplicagao na indiistria de prospecgao e produgao de petr6leo, mas nao Iimitado a este tipo de aplicagao. O anel de veda?ao έ posicionado na interface entre os dois componentes mecanicos e energizado mecanicamente ou com ο auxilio de forga hidraulica, de maneira a produzir elevadas tensoes de contato nas superficies de vedagao. *The sealing ring is made of low carbon or low alloy carbon steel or corrosion resistant alloys known as stainless steel or nickel based corrosion resistant alloys (CRA) or any other metallic material that allows it to be made. The seal between two mechanical components that are usually tubular and of great application in the oil prospecting and production industry, but not limited to this type of application. The sealing ring is positioned at the interface between the two mechanical components and is energized mechanically or with the aid of hydraulic force in order to produce high contact stresses on the sealing surfaces. *
DESCRigAO DAS FIGURASDESCRIPTION OF THE FIGURES
Para melhor explicar a inven^ao relacionam-se abaixo os desenhos que representam de forma ilustrativa e nao limitativa. Figura 1: Vista em corte da vedagao metalica TX instalada, comTo further explain the invention, the drawings below illustrate and not limit the following. Figure 1: Cross-sectional view of the installed TX metal fence with
detalhe ampliado;enlarged detail;
Figura 2: Vista em corte da vedag§o metalica TX instalada em uma primeira varia?ao construtiva, com detalhe ampliado;Figure 2: Sectional view of the TX metal fence installed in a first constructive variation, with enlarged detail;
Figura 3: Vista em corte da veda?ao metalica TX instalada em uma segunda variagao construtiva, com detalhe ampliado;Figure 3: Sectional view of the TX metal seal installed in a second constructive variation, with enlarged detail;
Figura 4: Vista em corte da vedagao metalica TX instalada em uma terceira variagao construtiva, com detalhe ampliado;Figure 4: Sectional view of the TX metal fence installed in a third constructive variation, with enlarged detail;
Figura 5: Vista em corte da vedagao metalica TX instalada em uma quarta variagao construtiva, com detalhe ampliado.Figure 5: Cross-sectional view of the TX metal fence installed in a fourth constructional variation, with enlarged detail.
DESCRigAO DETALHADA DA INVENQAO A "VEDAQAO METALICA DO TIPO TX" objeto desta solicita9§o de patente, consiste essencialmente de uma vedagao (4) metal contra metal do tipo TX que veda contra as sedes (6) fabricadas pela deposigao de material com alta resistencia a corrosao, pertencentes as duas pegas circulares (1 e 2) definidas pela Iinha de centra (5) firmemente unidas pela conexao (3) metalicas que torqueada energiza a superficie (9) produzindo a veda?ao nessa regiSo.DETAILED DESCRIPTION OF THE INVENTION The "TX TYPE METAL SEAL" object of this patent application consists essentially of a TX-to-metal metal seal (4) that seals against the seats (6) made by depositing high strength material corrosion, belonging to the two circular handles (1 and 2) defined by the centerline (5) firmly joined by the metalic connection (3) that torqued energizes the surface (9) producing the seal in that region.
Mais particularmente, conforme a figura 1, a veda?ao refere-se a um anel circular metalico (4) que permite a vedagao entre duas pe^as circulares (1) e (2) definidas pela Iinha de centra (5) que sao Iigadas rigidamente pela pega circular (3) que pode ser acionada mecanicamente atraves de rosea ou por um sistema hidraulico conforme mostrado na figura 1. As pegas (1) e (2) tem uma deposigao de material altamente resistente a corrosao (6) em todas as superficies de vedag§o, sendo normalmente de Iigas de Niquel, mas nao Iimitado a este tipo de material. O anel de vedagao (4) e normalmente fabricado em ago de baixo carbono ou de ago carbono de baixa Iiga ou agos resistentes a corrosao conhecidos como agos inoxidaveis ou Iigas resistentes a corrosao a base de niquel (CRA), mas nao Iimitado a estes materials. O material do anel de vedagao (4) apresenta normalmente Iimite de escoamento inferior ao do material (6) de maneira a permitir sua deformagao no regime elasto-plastico eliminando todas as folgas de projeto mantendo a integridade das sedes de veda^ao. O anel de veda^ao (4) apresenta a superficie (9) plana por onde ο selo e energizado atraves do movimento axial da pega (1) pelo eixo (5) produzind© a veda?ao nesta regiao. A energizag§o do anel de vedagao (4) permite a elimina?ao das folgas de projeto e ο contato entre a superficie de vedagao (7) do anel onde se pronuncia uma pequena curvatura e a superficie (16) correspondente ao diametro externo da pega (1). Similarmente, a energizagao do anel (4) produz vedagao na superficie de contato (8) plana e a pe?a (2). A vedagao do anel (4) e produzida pelas altas pressoes de contato desenvolvidas durante ο processo de energiza^ao do elemento de vedagao nas superficies (7), (8), (9) e (16).More particularly, as shown in Figure 1, the seal refers to a circular metal ring (4) which allows sealing between two circular parts (1) and (2) defined by the centerline (5) which are Rigidly attached by the circular handle (3) which can be mechanically driven by rosea or a hydraulic system as shown in figure 1. The handles (1) and (2) have a highly corrosion resistant material deposition (6) on all the sealing surfaces are usually Nickel Alloys but not limited to this type of material. The O-ring (4) is usually made of low carbon or low alloy carbon or corrosion resistant alloys known as stainless steels or nickel based corrosion resistant alloys (CRA) but not limited to these materials. . The sealing ring material (4) usually has a lower flow limit than that of material (6) so as to allow it to deform in the elastoplastic regime eliminating all design clearances while maintaining the integrity of the sealing seats. The sealing ring (4) has the flat surface (9) through which the seal is energized by axial movement of the handle (1) by the shaft (5) producing the seal in this region. The energization of the sealing ring (4) allows the elimination of design gaps and contact between the sealing surface (7) of the ring where a slight curvature is pronounced and the surface (16) corresponding to the outer diameter of the sealing ring. take (1). Similarly, energization of the ring (4) produces sealing on the flat contact surface (8) and the part (2). The ring seal (4) is produced by the high contact pressures developed during the energizing process of the seal member on the surfaces (7), (8), (9) and (16).
Em uma primeira variagao construtiva, conforme a figura 2, a vedagao (10) do tipo metal contra metal mant6m as mesmas caracteristicas e particularidades ja comentadas, porem com a superficie de vedagao (7) onde se pronuncia uma pequena curvatura Iocalizada no Iado da superficie (17) correspondente ao diametro interno da pega (3), sendo a superficie (11) de dito anel (10), por onde a vedagao e energizada atraves do movimento axial da pega (1) tambem dotada.de projegoes arredondadas. Similarmente, a energizapao do anel (10) produz vedagao na superficie de contato (8), sem maiores detalhes, em relagao a pega (2). A vedagao do anel (10) e produzida pelas altas pressoes de contato desenvolvidas durante ο processo de energizagao do elemento de vedagao nas superficies (7), (8), (11) e (17).In a first constructive variation, as shown in Figure 2, the metal-to-metal seal (10) maintains the same characteristics and features as discussed above, but with the sealing surface (7) where a slight curvature located at the side of the surface is pronounced. (17) corresponding to the inner diameter of the handle (3), the surface (11) of said ring (10), whereby the seal is energized by axial movement of the handle (1) also provided with rounded projections. Similarly, energizing the ring (10) produces sealing on the contact surface (8), without further details, relative to the handle (2). The ring seal (10) is produced by the high contact pressures developed during the energizing process of the sealing member on the surfaces (7), (8), (11) and (17).
Em uma segunda variagao construtiva, conforme a figura 3, a vedagaoIn a second constructive variation, according to figure 3, the seal
(12) do tipo metal contra metal mantem as mesmas caracteristicas e particularidades ja comentadas, com a superficie (9) sem maiores detalhes e a superficie de veda^ao (7) e (20) pronunciadas el ou inclinadas em relag§o as superficies (16) e (19) correspondentes ao diametro externo da pe?a (1) e έ face inferior da sede de vedagao da pega (2). A superficie (20) do anel de veda?§o (12) pode ser inclinada conforme mostrado ou ate mesmo horizontal. Similarmente, a energizagao do anel (12) produz vedagao na superficie de contato (8), sem maiores detalhes, em relag§o a pega (2). A vedag§o do anel (12) e produzida pelas altas pressQes de contato desenvolvidas durante ο processo de energizagao do elemento de vedagao nas(12) of the metal-to-metal type maintain the same characteristics and particularities as previously noted, with the surface (9) without further details and the sealing surface (7) and (20) pronounced or slanted with respect to the surfaces. (16) and (19) corresponding to the outer diameter of the part (1) and the lower face of the handle seal seat (2). The surface (20) of the sealing ring (12) may be slanted as shown or even horizontal. Similarly, energization of the ring (12) produces sealing on the contact surface (8), without further details, with respect to the handle (2). The ring seal (12) is produced by the high contact pressures developed during the energizing process of the sealing member in the
superficies (7), (8), (9), (16), (19) e (20). Em uma terceira variagao construtiva, conforme a figura 4, a vedagao (13) do tipo metal contra metal mantem as mesmas caracteristicas e particularidades ja comentadas, apresenta as superficies arredondadas (11) por onde ο selo e energizado atrav6s do movimento axial da pega (1) pelo eixo (5) produzindo a veda?ao nesta regiao. A superficie (20) do anel de veda?§o (13) pode ser inclinada ou ate mesmo horizontal e a superficie (7) pronunciada em rela^ao a parede (17). Similarmente, a energizagao do anel (13) produz vedagao na superficie de contato (8) em relagao έ pega (2). A vedagao do anel (13) e produzida pelas altas pressoes de contato desenvolvidas durante ο processo de energizag^o do elemento de vedagao nas superficies (7), (8), (11), (17), (19) e (20).surfaces (7), (8), (9), (16), (19) and (20). In a third constructive variation, as shown in Figure 4, the metal-to-metal seal (13) retains the same characteristics and features as discussed above, has the rounded surfaces (11) through which the seal is energized through the axial movement of the handle ( 1) by the shaft (5) producing the seal in this region. The surface (20) of the sealing ring (13) may be slanted or even horizontal and the surface (7) pronounced relative to the wall (17). Similarly, energization of the ring (13) produces sealing at the contact surface (8) relative to the handle (2). The ring seal (13) is produced by the high contact pressures developed during the energizing process of the seal member on the surfaces (7), (8), (11), (17), (19) and (20). ).
Em uma quarta variagao construtiva, conforme a figura 5’ a veda?ao (15) do tipo metal contra metal mantem as mesmas caracteristicas e particularidades ja comentadas, apresenta as regioes de vedagao (11) pronunciadas por onde ο selo e energizado atraves do movimento axial do flange (14) pelo eixo (5) produzindo a veda^ao nesta regiao. Tal qual a superficie de vedagao (7) do anel e ao contrario da superficie (8) e (18) sem maiores detalhes pertencentes ao flange inferior (14). A vedagao do anel (15) e produzida pelas altas pressoes de contato desenvolvidas durante ο processo de energizagao do elemento de vedag§o nas superficies (7), (8),In a fourth constructive variation, according to figure 5 'the metal-to-metal seal (15) maintains the same characteristics and particularities as discussed above, presents the sealing regions (11) pronounced where the seal is energized by movement. of the flange (14) by the shaft (5) producing the seal in this region. Like the sealing surface (7) of the ring and unlike surface (8) and (18) without further details pertaining to the lower flange (14). The ring seal (15) is produced by the high contact pressures developed during the energizing process of the sealing element on the surfaces (7), (8),
(11)(11)
eand
(18).(18).
Claims (5)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BRPI1103520-0A BRPI1103520A2 (en) | 2011-07-06 | 2011-07-06 | tx type metal seal |
| PCT/BR2012/000193 WO2013003919A1 (en) | 2011-07-06 | 2012-06-26 | Metal tx seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BRPI1103520-0A BRPI1103520A2 (en) | 2011-07-06 | 2011-07-06 | tx type metal seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BRPI1103520A2 true BRPI1103520A2 (en) | 2013-07-02 |
Family
ID=47436393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BRPI1103520-0A BRPI1103520A2 (en) | 2011-07-06 | 2011-07-06 | tx type metal seal |
Country Status (2)
| Country | Link |
|---|---|
| BR (1) | BRPI1103520A2 (en) |
| WO (1) | WO2013003919A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3690685A (en) * | 1970-04-03 | 1972-09-12 | Siemens Ag | Sealing ring |
| CA1034488A (en) * | 1975-09-10 | 1978-07-11 | Mcevoy Oilfield Equipment Co. | Seal |
| US7467799B1 (en) * | 1999-08-05 | 2008-12-23 | Oil States Industries, Inc. | Composite metal-to-metal seal having a relatively soft metal overlay and a relatively hard metal core |
| US7025360B2 (en) * | 2002-09-25 | 2006-04-11 | Dril-Quip, Inc. | Metal seal with corrosion resistant alloy overlay |
| GB2438631B (en) * | 2006-06-02 | 2008-02-13 | Alan Stewart Paton | Bimetal Bore Seal |
-
2011
- 2011-07-06 BR BRPI1103520-0A patent/BRPI1103520A2/en not_active IP Right Cessation
-
2012
- 2012-06-26 WO PCT/BR2012/000193 patent/WO2013003919A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013003919A1 (en) | 2013-01-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
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