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Expandable metal-to-metal seal connection
PATENTS for enhanced strength, mechanical stability and durability, high utilisation of the ion-conducting membrane and the seal film material, and which is amenable to a high-speed continuous manufacturing process. Patent number: WO/2015/145129 Inventors: D.E. Barnwell, R.J. Coleman, A. Dickinson, P.G. Gray and J.M.C. Soares Publication date: 1 October 2015
Piston seal assembly Applicant: Westport Power Inc, Canada A piston seal assembly is disclosed that consists of a seal and a seal energiser that supports the seal. The assembly has one component that is designed to position the seal energiser in a fixed axial position within the piston groove. In one embodiment, the seal energiser has the shape of a split ring, with at least one of its lateral surfaces shaped to position the energiser in a fixed position within a piston groove. In other embodiments, the assembly comprises a spacer that is positioned next to the seal energiser within the piston groove and is designed to position the energiser in a fixed axial position. The piston seal assembly may consist of a seal that has a portion which protrudes between the seal energiser and the piston groove wall, such that it locates the energiser in a fixed axial position within the piston groove. Patent number: WO/2015/143559 Inventors: T.S. Coleman and K. Hatami Aghdam Publication date: 1 October 2015
Damper seal for a double-flow compressor arrangement Applicant: Dresser-Rand Co, USA This patent discusses a seal assembly for a dualflow compressor. The objective is to create an improved damper seal that is capable of reducing vibrations and improving rotor-dynamic stability of a rotary shaft in the dual-flow centrifugal compressor. The assembly may include an annular body disposed about a rotary shaft, between the first and second compression assemblies of the dual-flow compressor. An inner radial surface of the annular body and an outer radial surface of the rotary shaft partially define a radial clearance between them. The annular body may have a first seal section and a second seal section at a first axial end-portion and a second axial endportion, respectively. The first and second seal sections at least partially define a cavity. The seal assembly may also include a reference line communicably coupling the cavity with an inlet of the first compression assembly and configured 14
Sealing Technology
to at least partially generate a pressure differential between the cavity and an outlet of the first compression assembly. Patent number: WO/2015/153146 Inventors: J.L. Gilarranz and K. Ramesh Publication date: 8 October 2015
Expandable metal-to-metal seal connection Applicant: Enventure Global Technology Llc, USA This disclosure relates generally to methods and an apparatus for coupling wellbore tubulars with a threaded connection that can be radially expanded. More specifically, it relates to methods and an apparatus for providing an expandable threaded connection with a metal-to-metal seal. The threaded connection includes a pin member formed on an end of a first tubular member. The pin member has an inner seal pin portion, a threaded pin portion and an outer seal pin portion. The inner seal pin portion has an inner diameter that is greater than an inner diameter of the outer seal pin portion. A box member is formed on an end of the second tubular member. This member includes an inner seal box portion, a threaded box portion, and an outer seal box portion. The inner seal box portion has an outer diameter that is greater than an outer diameter of the outer seal box portion. The inner seal pin portion engages the inner seal box portion and the outer seal pin portion engages the outer seal box portion when the threaded pin portion is engaged with the threaded box portion. Patent number: WO/2015/153271 Inventor: F.C. Bennett Publication date: 8 October 2015
between the protrusion and a recess of the two parts; contacting an outer surface of the bent cross-section with an inner surface of the recess; contacting an inner surface of the bent crosssection with an outer surface of the protrusion; and pressurising the diffuser. Patent number: WO/2015/152742 Inventors: S. Pakkala, R. Jamiolkowski, T. Jendrzejewski and R. Pruthi Publication date: 8 October 2015
Brush seal Applicant: Siemens Aktiengesellschaft, Germany This invention relates to a brush seal for a machine – preferably for a turbo-machine, but in particular a gas or steam turbine. The brush seal has a main body (3, 4 & 6) with two branches (4 & 6) and a web (3) connecting these; a brush (1) for sealing the gap (2) between two adjacent components of the machine (preferably between a rotating and stationary component of the machine); a securing means (7) for fixing the brush (1), in particular in an interference- and/or form-fitting manner, in the main body; and a tensioning means (5) for clamping the branches (4 & 6) in a slot (2) of the machine, independently of the brush. Patent number: WO/2015/155002 Inventors: S. Beichl, F. Deister,
Apparatus and method for sealing a turbine assembly Applicants: General Electric Co, USA; S. Pakkala and R. Pruthi, India; and R. Jamiolkowski and T. Jendrzejewski, Poland A turbine or turbine system is described that includes a compressor, combustor, turbine section, diffuser with a parting line between two components, and a seal along the parting line. The seal includes a protrusion, a recess and a flexible portion between the protrusion and the recess. The flexible portion has a bent crosssection – perpendicular to the parting line. An outer surface of the bent cross-section contacts an inner surface of the recess. An inner surface of the bent cross-section contacts an outer surface of the protrusion. Sealing a parting line between two parts of a diffuser in a gas turbine system includes disposing a flexible portion
This invention, detailed by patent WO/2015/155002, relates to a brush seal for a machine – preferably for a turbo-machine, but in particular a gas or steam turbine. The seal has a main body (3, 4 & 6) with two branches (4 & 6) and a web (3) connecting these; and a brush (1) for sealing the gap (2) between two adjacent components of the machine.
August 2016
Piston seal assembly Applicant: Westport Power Inc, Canada A piston seal assembly is disclosed that consists of a seal and a seal energiser that supports the seal. The assembly has one component that is designed to position the seal energiser in a fixed axial position within the piston groove. In one embodiment, the seal energiser has the shape of a split ring, with at least one of its lateral surfaces shaped to position the energiser in a fixed position within a piston groove. In other embodiments, the assembly comprises a spacer that is positioned next to the seal energiser within the piston groove and is designed to position the energiser in a fixed axial position. The piston seal assembly may consist of a seal that has a portion which protrudes between the seal energiser and the piston groove wall, such that it locates the energiser in a fixed axial position within the piston groove. Patent number: WO/2015/143559 Inventors: T.S. Coleman and K. Hatami Aghdam Publication date: 1 October 2015
Damper seal for a double-flow compressor arrangement Applicant: Dresser-Rand Co, USA This patent discusses a seal assembly for a dualflow compressor. The objective is to create an improved damper seal that is capable of reducing vibrations and improving rotor-dynamic stability of a rotary shaft in the dual-flow centrifugal compressor. The assembly may include an annular body disposed about a rotary shaft, between the first and second compression assemblies of the dual-flow compressor. An inner radial surface of the annular body and an outer radial surface of the rotary shaft partially define a radial clearance between them. The annular body may have a first seal section and a second seal section at a first axial end-portion and a second axial endportion, respectively. The first and second seal sections at least partially define a cavity. The seal assembly may also include a reference line communicably coupling the cavity with an inlet of the first compression assembly and configured 14
Sealing Technology
to at least partially generate a pressure differential between the cavity and an outlet of the first compression assembly. Patent number: WO/2015/153146 Inventors: J.L. Gilarranz and K. Ramesh Publication date: 8 October 2015
Expandable metal-to-metal seal connection Applicant: Enventure Global Technology Llc, USA This disclosure relates generally to methods and an apparatus for coupling wellbore tubulars with a threaded connection that can be radially expanded. More specifically, it relates to methods and an apparatus for providing an expandable threaded connection with a metal-to-metal seal. The threaded connection includes a pin member formed on an end of a first tubular member. The pin member has an inner seal pin portion, a threaded pin portion and an outer seal pin portion. The inner seal pin portion has an inner diameter that is greater than an inner diameter of the outer seal pin portion. A box member is formed on an end of the second tubular member. This member includes an inner seal box portion, a threaded box portion, and an outer seal box portion. The inner seal box portion has an outer diameter that is greater than an outer diameter of the outer seal box portion. The inner seal pin portion engages the inner seal box portion and the outer seal pin portion engages the outer seal box portion when the threaded pin portion is engaged with the threaded box portion. Patent number: WO/2015/153271 Inventor: F.C. Bennett Publication date: 8 October 2015
between the protrusion and a recess of the two parts; contacting an outer surface of the bent cross-section with an inner surface of the recess; contacting an inner surface of the bent crosssection with an outer surface of the protrusion; and pressurising the diffuser. Patent number: WO/2015/152742 Inventors: S. Pakkala, R. Jamiolkowski, T. Jendrzejewski and R. Pruthi Publication date: 8 October 2015
Brush seal Applicant: Siemens Aktiengesellschaft, Germany This invention relates to a brush seal for a machine – preferably for a turbo-machine, but in particular a gas or steam turbine. The brush seal has a main body (3, 4 & 6) with two branches (4 & 6) and a web (3) connecting these; a brush (1) for sealing the gap (2) between two adjacent components of the machine (preferably between a rotating and stationary component of the machine); a securing means (7) for fixing the brush (1), in particular in an interference- and/or form-fitting manner, in the main body; and a tensioning means (5) for clamping the branches (4 & 6) in a slot (2) of the machine, independently of the brush. Patent number: WO/2015/155002 Inventors: S. Beichl, F. Deister,
Apparatus and method for sealing a turbine assembly Applicants: General Electric Co, USA; S. Pakkala and R. Pruthi, India; and R. Jamiolkowski and T. Jendrzejewski, Poland A turbine or turbine system is described that includes a compressor, combustor, turbine section, diffuser with a parting line between two components, and a seal along the parting line. The seal includes a protrusion, a recess and a flexible portion between the protrusion and the recess. The flexible portion has a bent crosssection – perpendicular to the parting line. An outer surface of the bent cross-section contacts an inner surface of the recess. An inner surface of the bent cross-section contacts an outer surface of the protrusion. Sealing a parting line between two parts of a diffuser in a gas turbine system includes disposing a flexible portion
This invention, detailed by patent WO/2015/155002, relates to a brush seal for a machine – preferably for a turbo-machine, but in particular a gas or steam turbine. The seal has a main body (3, 4 & 6) with two branches (4 & 6) and a web (3) connecting these; and a brush (1) for sealing the gap (2) between two adjacent components of the machine.
August 2016