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Packer assembly with dual hydrostatic pistons
PATENTS Seal for use in an extrusion device Applicant: Kraussmaffei Technologies GmbH, Germany This invention relates to a seal (300) for use in an extrusion device for producing continuous profiles – in particular plastics pipes. In order to achieve reliable sealing action in the case of a pipe with a large diameter and to achieve further advantages, while avoiding chattering or stick-slip effects, provision is made of a seal (300) according to the invention that has an elastic sealing disc (326). This is arranged in a plane approximately perpendicularly to the extrusion direction and has a through-passage opening (332) to let through the continuous profile, and has a sealing rim bearing against the continuous profile. A means of connection (328) is arranged along the sealing rim, and a clamping device (320) is used to exert a force on this connection. The force acts radially with respect to the extrusion axis. Clamping devices (320) are arranged in the plane parallel to the sealing disc (326), have a passage opening for the continuous profile and include “connectors” (324) for tying the means of connection (328) to the clamping devices (320). Patent number: WO/2014/006210 Inventors: A. Altmann and M. Geyer Publication date: 9 January 2014
Seal with non-metallic interface Applicant: United Technologies Corp, USA This invention generally relates to a seal between a fixed member and a moveable member. In particular, it relates to a finger seal between relatively moveable ducts. A gas-turbine engine typically includes a duct for directing exhaust gases. Many exhaust duct assemblies include a moveable portion for selectively directing the gases. Such assemblies include a fixed portion and a moveable portion, and it is necessary to place a seal between these portions in order to prevent intrusion of exhaust gases through the exhaust nozzle assembly at the interface between the fixed and moveable portions. According to an embodiment of this patent, a seal for use between first and second ducts (the ducts being able to move relative to each other) includes a first plurality of fingers for attachment to the first duct to be disposed about the first and second ducts. The flexible members of the seal provide for expansion and contraction along with creating flexibility in the region of contact between a seal land on the moveable part and the seal. Although the seal is mounted to the fixed part, it also may be fixed to the moveable part and contact a seal land on the fixed part. A first surface of one of the plurality of fingers and the seal is metallic whilst a second surface of an other seal land or one of the plurality of fingers is non-metallic. Patent number: WO/2014/007891 Inventors: S.W. Burd, R.W. Bursey, G.F. Martinez and M.H. Harris-Miller Publication date: 9 January 2014
Seal actuator with actuation level indicator
Patent WO/2014/006210 relates to a seal (300) for use in an extrusion device for producing continuous profiles – in particular, plastics pipes.
14
Sealing Technology
Applicant: Tyco Electronics Raychem Bvba, Belgium One aspect of this invention relates to a cable sealing unit that has an actuator for applying spring pressure to a sealant, and a means of providing a visual indication of the level of “spring-pressure” applied to the sealant (that is, the actuation level) at the time of installation. In certain embodiments, the “indicator” provides a visual indication of the level of pressure initially applied at installation, even after the level of pressure has decreased over time through a reduction in sealant volume. In other embodiments, the indicator includes a means of accommodating sealant volume reduction (for example, gel shrinkage caused by oil bleedout or other causes) over time. The patent also says that the indicator includes a member that moves relative to a sealant pressurisation struc-
ture during initial sealant-spring pressurisation, and moves with the pressurisation structure as the sealant’s volume is reduced over time. Patent number: WO/2014/005919 Inventor: P. Coenegracht Publication date: 9 January 2014
Packer assembly with dual hydrostatic pistons Applicant: Halliburton Energy Services Inc, USA A packer has been developed for use in a wellbore, and includes a mandrel. First and second pistons are disposed about the packer mandrel, defining first and second chambers. A first activation assembly initially prevents movement of the first piston. Similarly, a second activation assembly initially prevents movement of the second piston. A seal assembly is disposed about the packer mandrel, between the first and second pistons, such that actuation of the first assembly enables a force generated by the pressure difference between the well-bore and the first chamber to shift the first piston in a direction towards the seal assembly to expand it radially. Actuation of the second assembly enables a force, also generated by the pressure difference between the well-bore and the second chamber, to shift the second piston towards the seal assembly, again to expand it radially. Patent number: WO/2014/007794 Inventor: M.D. Ezell Publication date: 9 January 2014
Shaft seal assembly Applicant: Inpro/Seal Llc, USA This patent provides an illustrative embodiment of a multi-shaft seal assembly that generally includes first and second seals, and a collar. The collar may be integrally formed with a portion of the first seal, and may serve to axially space the second seal from the first. The second seal is formed so as to include a cutaway to ensure proper clearance between the second seal and one of the shafts. Other embodiments of this multi-shaft seal assembly use a collar formed with the equipment housing or second seal. Other embodiments include further seals for additional shafts. Patent number: WO/2014/007971 Inventors: D.C. Orlowski, N.F. Hoehle, R.A. Tejano and M. Pullias Publication date: 9 January 2014
Seal ring with lip relief Applicant: Schaeffler Technologies Ag & Co Kg, Germany In summary, this invention relates to a seal ring
July 2014
Seal with non-metallic interface Applicant: United Technologies Corp, USA This invention generally relates to a seal between a fixed member and a moveable member. In particular, it relates to a finger seal between relatively moveable ducts. A gas-turbine engine typically includes a duct for directing exhaust gases. Many exhaust duct assemblies include a moveable portion for selectively directing the gases. Such assemblies include a fixed portion and a moveable portion, and it is necessary to place a seal between these portions in order to prevent intrusion of exhaust gases through the exhaust nozzle assembly at the interface between the fixed and moveable portions. According to an embodiment of this patent, a seal for use between first and second ducts (the ducts being able to move relative to each other) includes a first plurality of fingers for attachment to the first duct to be disposed about the first and second ducts. The flexible members of the seal provide for expansion and contraction along with creating flexibility in the region of contact between a seal land on the moveable part and the seal. Although the seal is mounted to the fixed part, it also may be fixed to the moveable part and contact a seal land on the fixed part. A first surface of one of the plurality of fingers and the seal is metallic whilst a second surface of an other seal land or one of the plurality of fingers is non-metallic. Patent number: WO/2014/007891 Inventors: S.W. Burd, R.W. Bursey, G.F. Martinez and M.H. Harris-Miller Publication date: 9 January 2014
Seal actuator with actuation level indicator
Patent WO/2014/006210 relates to a seal (300) for use in an extrusion device for producing continuous profiles – in particular, plastics pipes.
14
Sealing Technology
Applicant: Tyco Electronics Raychem Bvba, Belgium One aspect of this invention relates to a cable sealing unit that has an actuator for applying spring pressure to a sealant, and a means of providing a visual indication of the level of “spring-pressure” applied to the sealant (that is, the actuation level) at the time of installation. In certain embodiments, the “indicator” provides a visual indication of the level of pressure initially applied at installation, even after the level of pressure has decreased over time through a reduction in sealant volume. In other embodiments, the indicator includes a means of accommodating sealant volume reduction (for example, gel shrinkage caused by oil bleedout or other causes) over time. The patent also says that the indicator includes a member that moves relative to a sealant pressurisation struc-
ture during initial sealant-spring pressurisation, and moves with the pressurisation structure as the sealant’s volume is reduced over time. Patent number: WO/2014/005919 Inventor: P. Coenegracht Publication date: 9 January 2014
Packer assembly with dual hydrostatic pistons Applicant: Halliburton Energy Services Inc, USA A packer has been developed for use in a wellbore, and includes a mandrel. First and second pistons are disposed about the packer mandrel, defining first and second chambers. A first activation assembly initially prevents movement of the first piston. Similarly, a second activation assembly initially prevents movement of the second piston. A seal assembly is disposed about the packer mandrel, between the first and second pistons, such that actuation of the first assembly enables a force generated by the pressure difference between the well-bore and the first chamber to shift the first piston in a direction towards the seal assembly to expand it radially. Actuation of the second assembly enables a force, also generated by the pressure difference between the well-bore and the second chamber, to shift the second piston towards the seal assembly, again to expand it radially. Patent number: WO/2014/007794 Inventor: M.D. Ezell Publication date: 9 January 2014
Shaft seal assembly Applicant: Inpro/Seal Llc, USA This patent provides an illustrative embodiment of a multi-shaft seal assembly that generally includes first and second seals, and a collar. The collar may be integrally formed with a portion of the first seal, and may serve to axially space the second seal from the first. The second seal is formed so as to include a cutaway to ensure proper clearance between the second seal and one of the shafts. Other embodiments of this multi-shaft seal assembly use a collar formed with the equipment housing or second seal. Other embodiments include further seals for additional shafts. Patent number: WO/2014/007971 Inventors: D.C. Orlowski, N.F. Hoehle, R.A. Tejano and M. Pullias Publication date: 9 January 2014
Seal ring with lip relief Applicant: Schaeffler Technologies Ag & Co Kg, Germany In summary, this invention relates to a seal ring
July 2014