A sleeve for a lip seal assembly includes a rigid portion with a tubular section having an inner surface defining a bore for receiving a shaft and an outer surface providing a seal engagement surface, and a radial flange extending from an axial end of the tubular section. An elastomeric portion attached to the rigid portion has a tubular section disposed within the rigid portion bore and a lip extending axially outwardly from one axial end of the tubular section so as to be disposed externally of the rigid portion bore and having a sealing surface engageable with the shaft outer surface, and may have another lip extending axially from the opposing axial end. The axial lip(s) reduce installation forces, retain lubricant within the sleeve bore during shipping, handling, test shaft and plug installation and removal, and final shaft assembly, and the air side lip prevents leakage of assembly lubricant.

A sleeve for a lip seal assembly includes a rigid portion with a tubular section having an inner surface defining a bore for receiving a shaft and an outer surface providing a seal engagement surface, and a radial flange extending from an axial end of the tubular section. An elastomeric portion attached to the rigid portion has a tubular section disposed within the rigid portion bore and a lip extending axially outwardly from one axial end of the tubular section so as to be disposed externally of the rigid portion bore and having a sealing surface engageable with the shaft outer surface, and may have another lip extending axially from the opposing axial end. The axial lip(s) reduce installation forces, retain lubricant within the sleeve bore during shipping, handling, test shaft and plug installation and removal, and final shaft assembly, and the air side lip prevents leakage of assembly lubricant.

A downhole tool body includes an outer surface having at least one O-ring gland. The at least one O-ring gland includes a first contour having a first radius greater than about 0.035″ (R0.89 mm) and a second contour having a second radius greater than about 0.035″ (R0.89 mm). A backup ring is arranged in the O-ring gland. The backup ring includes a gland contour having a radius that is complimentary to the first radius.

A downhole tool body includes an outer surface having at least one O-ring gland. The at least one O-ring gland includes a first contour having a first radius greater than about 0.035″ (R0.89 mm) and a second contour having a second radius greater than about 0.035″ (R0.89 mm). A backup ring is arranged in the O-ring gland. The backup ring includes a gland contour having a radius that is complimentary to the first radius.

A rotational seal assembly is associated with a rotating component. The rotational seal includes an outer casing, an inner casing, a rotational seal connected to the outer casing and the inner casing, and a followability enhancer. A section of the rotational seal includes a heel portion and a toe portion. The rotational seal is configured to contact, via a first surface of the section of the rotational seal and during operation of the rotating component, the rotating component. The followability enhancer is configured to contact, during the operation of the rotating component, a first region of a second surface of the section of the rotational seal that is associated with the toe portion. The followability enhancer is configured to not contact, during the operation of the rotating component, a second region of the second surface of the section of the rotational seal that is associated with the heel portion.

A rotational seal assembly is associated with a rotating component. The rotational seal includes an outer casing, an inner casing, a rotational seal connected to the outer casing and the inner casing, and a followability enhancer. A section of the rotational seal includes a heel portion and a toe portion. The rotational seal is configured to contact, via a first surface of the section of the rotational seal and during operation of the rotating component, the rotating component. The followability enhancer is configured to contact, during the operation of the rotating component, a first region of a second surface of the section of the rotational seal that is associated with the toe portion. The followability enhancer is configured to not contact, during the operation of the rotating component, a second region of the second surface of the section of the rotational seal that is associated with the heel portion.

A seal assembly is for sealing between an outer member and an inner member, one of which is rotatable about a central axis. An outer annular case is coupled with the outer member and an inner annular case is disposed within and spaced radially inwardly from the outer case. An annular sealing member is disposed within and coupled with the inner case, the sealing member having a centerline coaxial with the central axis and a sealing lip or lips engaged with the inner member. An annular elastomeric coupler has a first axial end attached to the outer case and a second axial end attached to the inner case. The elastomeric coupler is radially deflectable such that the outer case or inner case is radially displaceable relative to the other one of the two cases while the centerline of the sealing member remains coaxial with the central axis.

Cushion holes are provided in cover members, tubular cushion rings are provided on a piston and a piston rod so as to be insertable into and withdrawable from the cushion holes as the piston moves, cushion packings capable of slidably contacting the outer circumference of the cushion rings are mounted to be movable in an axial direction, in mounting grooves formed on inner walls of the cover members constituting the cushion holes, the cushion packings each include a plurality of protrusions extending from the outer circumferential surface to the side surface near the piston and disposed circumferentially alongside one another, and cushioning grooves that extend in parallel with the axis of the cushion rings and whose cross-sectional area changes are formed on the outer circumferential surface of the cushion rings.

Systems and methods include providing a seal for an assembly. The seal includes a jacket having a base, an inner sealing leg, and an outer sealing leg, and further includes a spring disposed within the jacket between and in contact with the inner sealing leg and the outer sealing leg. The spring includes an annular support ring disposed within the spring. The support ring biases an outer diameter (OD) of the spring towards the outer sealing leg of the jacket to maintain contact pressure between the inner sealing leg of the jacket and the shaft of the assembly. The support ring controls thermal shrinkage of the spring and the outer sealing leg to maintain a seal between a housing and a shaft of the assembly when the assembly is operated at cryogenic temperatures.

[Problem] To provide a method for manufacturing a sealing device having high pressure-resistance and high durability. Provided is a method for manufacturing a sealing device to be provided between a shaft and an inner surface of a shaft hole in which the shaft is provided, the method comprising: a step for forming an atmosphere-side rigid ring by forming a through-hole in a rigid body by a punching-out process; a step for causing a reinforcement ring for reinforcing an elastic ring to contact the elastic ring in a direction parallel to the axial direction of the shaft, wherein the elastic ring is made of an elastic body, is attached to a liquid-side rigid ring made of a rigid body and disposed inside the shaft hole, is disposed radially inward of the liquid-side rigid ring, and has formed thereon a seal lip that slidably makes sealing contact with the shaft; and a step for causing the atmosphere-side rigid ring to contact the reinforcement ring in a direction parallel to the axial direction of the shaft so that a surface contacted by an end surface of a punch during the punching-out process of the atmosphere-side rigid ring is positioned on an opposite side to the reinforcement ring.