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Heat exchanger with self-retaining bypass seal
PATENTS Cylinder-liner assembly Applicant: Caterpillar Inc, USA In one aspect, this patent focuses on a cylinder-liner assembly. The assembly may include a liner with a hollow – generally cylindrical – body extending from a top end to a bottom end, along a longitudinal axis. The cylinder-liner assembly may also include a seal disposed around the liner at the top end, and an anti-polishing ring disposed within the top end of the liner. The antipolishing ring has an annular groove formed on an outer surface to provide an air gap between it and the liner. The annular groove may axially overlap at least a portion of the seal. In another aspect, this disclosure covers an anti-polishing ring, which may include a hollow, generally cylindrical body. This ring may include a single, annular groove, formed on an outer surface of the body. This is done in order to create an air gap around the antipolishing ring. The latter may further include a pair of feet disposed at opposing ends of the single annular groove. Patent number: WO/2016/054173 Inventors: B.L. Morgan, J.A. Subatch and M.J. Pollard Publication date: 7 April 2016
Heat exchanger with self-retaining bypass seal Applicant: Dana Canada Corp, Canada This invention relates to a heat exchanger for cooling a hot gas with a liquid coolant. In particular, it concerns gas–liquid charge air coolers that have a housing enclosing a heatexchanger core. The gas–liquid heat exchanger comprises a stack of flat tubes, defining liquidflow passages. Spaces between the flat tubes define gas-flow passages – with the sides of the core having an irregular comb-like arrangement. The heat exchanger further includes a housing that covers the sides of the core, and is spaced from the sides of the core. The core has at least one portion of reduced width, so as to provide channels extending throughout its (the core) height. The heat exchanger also has a pair of side seals, at least partly received in the gap between the side cover of the housing and the core, but more particularly in the channels along the sides of the core. The side seal extends throughout the height of the core and has a thickness that is greater than that of the gap. Patent number: WO/2016/049776 Inventors: N.S. Stewart, C.A. Shore and L.M. Kinder Publication date: 7 April 2016 14
Sealing Technology
Pressure compensation mechanism for a rotary drilling device seal assembly Applicant: Halliburton Energy Services Inc, USA The downhole rotary seal assembly detailed by this patent includes a primary rotary seal, a barrier seal and a seal carrier. The seal carrier includes an inner surface, an outer surface and a first groove dimensioned to receive the primary rotary seal at the inner surface. The seal carrier also includes a second groove dimensioned to receive the barrier seal at the inner surface. An aperture is defined on the inner surface, between the first and second grooves. A relief port, located between the first and second grooves, is positioned to fluidly couple the aperture and the outer surface. This relief port includes a check valve that has a predefined crack pressure. Patent number: WO/2016/053354 Inventor: E.P. Hagar Publication date: 7 April 2016
of efficiently reflecting the resilience of a coil spring’. The spring-loaded C-ring has a soft metal covering (3). A metal coil spring (4) is inserted in the covering (3), and the coil spring is configured by winding a wire (6), with a rectangular cross section, into a coil. The total length of coil-spring-to-covering contact, in which the outer surface (4b) of the coil spring contacts the inner surface (3a) of the covering (3) in the unused state, with respect to the entire length of the inner surface of the covering – measured along an intended pressure sealline through which sealing effects are achieved by pressing the C-ring on one of a pair of opposing parallel planes (1 & 1) to be sealed – is set at 90–99%. Patent number: WO/2016/052165 Inventors: K. Kashihara and T. Honda Publication date: 7 April 2016
Motor compensator and shaft seal module for a submersible pumping system Applicants: Schlumberger Canada Ltd, Canada; Services Petroliers Schlumberger, France; Schlumberger Technology Bv, The Netherlands; and Schlumberger Technology Corp, USA This patent describes a system and methodology for improving the usefulness of certain types of motors and pumping systems in wells ranging from horizontal to vertical. The system and methodology facilitate oil volume change compensation whilst providing multiple shaft seals in an electric submersible pumping system. A compensator is combined with a shaft seal module. Both the compensator and shaft seal module may be located between a submersible motor and pump. According to the inventor, the compensator is able to balance pressure differentials between the interior of the motor and the exterior of the electric submersible pumping system without “breathing through” the shaft seal module. Patent number: WO/2016/053658 Inventor: A. Watson Publication date: 7 April 2016
The purpose of this invention – detailed by patent WO/2016/052165 – is to provide a spring-loaded C-ring which, according to the inventors, ‘is capable of efficiently reflecting the resilience of a coil spring’. The springcontaining C-ring can be used, for example, in a semiconductor device or pressure vessel.
Spring-loaded C-ring
Externally-pressurised porous media serving as a thrust bearing and seal
Applicant: Mitsubishi Cable Industries Ltd, Japan The designers behind this invention say the aim is to ‘provide a spring-loaded C-ring capable
Applicant: New Way Machine Components Inc, USA Briefly stated, an embodiment of this invention uses a porous material that is externally pressurised
February 2017
Heat exchanger with self-retaining bypass seal Applicant: Dana Canada Corp, Canada This invention relates to a heat exchanger for cooling a hot gas with a liquid coolant. In particular, it concerns gas–liquid charge air coolers that have a housing enclosing a heatexchanger core. The gas–liquid heat exchanger comprises a stack of flat tubes, defining liquidflow passages. Spaces between the flat tubes define gas-flow passages – with the sides of the core having an irregular comb-like arrangement. The heat exchanger further includes a housing that covers the sides of the core, and is spaced from the sides of the core. The core has at least one portion of reduced width, so as to provide channels extending throughout its (the core) height. The heat exchanger also has a pair of side seals, at least partly received in the gap between the side cover of the housing and the core, but more particularly in the channels along the sides of the core. The side seal extends throughout the height of the core and has a thickness that is greater than that of the gap. Patent number: WO/2016/049776 Inventors: N.S. Stewart, C.A. Shore and L.M. Kinder Publication date: 7 April 2016 14
Sealing Technology
Pressure compensation mechanism for a rotary drilling device seal assembly Applicant: Halliburton Energy Services Inc, USA The downhole rotary seal assembly detailed by this patent includes a primary rotary seal, a barrier seal and a seal carrier. The seal carrier includes an inner surface, an outer surface and a first groove dimensioned to receive the primary rotary seal at the inner surface. The seal carrier also includes a second groove dimensioned to receive the barrier seal at the inner surface. An aperture is defined on the inner surface, between the first and second grooves. A relief port, located between the first and second grooves, is positioned to fluidly couple the aperture and the outer surface. This relief port includes a check valve that has a predefined crack pressure. Patent number: WO/2016/053354 Inventor: E.P. Hagar Publication date: 7 April 2016
of efficiently reflecting the resilience of a coil spring’. The spring-loaded C-ring has a soft metal covering (3). A metal coil spring (4) is inserted in the covering (3), and the coil spring is configured by winding a wire (6), with a rectangular cross section, into a coil. The total length of coil-spring-to-covering contact, in which the outer surface (4b) of the coil spring contacts the inner surface (3a) of the covering (3) in the unused state, with respect to the entire length of the inner surface of the covering – measured along an intended pressure sealline through which sealing effects are achieved by pressing the C-ring on one of a pair of opposing parallel planes (1 & 1) to be sealed – is set at 90–99%. Patent number: WO/2016/052165 Inventors: K. Kashihara and T. Honda Publication date: 7 April 2016
Motor compensator and shaft seal module for a submersible pumping system Applicants: Schlumberger Canada Ltd, Canada; Services Petroliers Schlumberger, France; Schlumberger Technology Bv, The Netherlands; and Schlumberger Technology Corp, USA This patent describes a system and methodology for improving the usefulness of certain types of motors and pumping systems in wells ranging from horizontal to vertical. The system and methodology facilitate oil volume change compensation whilst providing multiple shaft seals in an electric submersible pumping system. A compensator is combined with a shaft seal module. Both the compensator and shaft seal module may be located between a submersible motor and pump. According to the inventor, the compensator is able to balance pressure differentials between the interior of the motor and the exterior of the electric submersible pumping system without “breathing through” the shaft seal module. Patent number: WO/2016/053658 Inventor: A. Watson Publication date: 7 April 2016
The purpose of this invention – detailed by patent WO/2016/052165 – is to provide a spring-loaded C-ring which, according to the inventors, ‘is capable of efficiently reflecting the resilience of a coil spring’. The springcontaining C-ring can be used, for example, in a semiconductor device or pressure vessel.
Spring-loaded C-ring
Externally-pressurised porous media serving as a thrust bearing and seal
Applicant: Mitsubishi Cable Industries Ltd, Japan The designers behind this invention say the aim is to ‘provide a spring-loaded C-ring capable
Applicant: New Way Machine Components Inc, USA Briefly stated, an embodiment of this invention uses a porous material that is externally pressurised
February 2017