Swivel seal assembly

16) A composite seal configured for a swivel seal assembly, the swivel seal assembly having a first part rotatable about a longitudinal axis in comparison to a second part, wherein the first and second parts cooperatively form an inside annular groove disposed between the first and second parts, the inside annular groove being cylindrically-shaped and aligned about the longitudinal axis, wherein a gap between the first and second parts is connected to the inside annular groove, wherein the composite seal is configured to be disposed within the inside annular groove to seal the gap, wherein the composite seal is configured to be aligned about the longitudinal axis and is delimited by an inside diameter opposite an outside diameter connected by a first axial side opposite a second axial side, wherein the composite seal comprises:

• an elastomeric seal ring bonded to at least one anti-extrusion ring, wherein the at least one anti-extrusion ring is disposed at the second axial side configured to be placed adjacent to the gap when the composite seal is disposed within the inside annular groove;
• wherein the elastomeric seal ring starts from the first axial side and extends longitudinally along the inside and outside diameters until it reaches the at least one anti-extrusion ring;
• wherein the elastomeric seal ring includes an outside annular valley formed along the outside diameter, the outside annular valley separating a first outside sealing annular interface apart from a second outside sealing annular interface, the first outside sealing annular interface disposed adjacent to the first axial side and the second outside sealing annular interface disposed adjacent to the at least one anti-extrusion ring;
• wherein the elastomeric seal ring includes an inside annular valley formed along the inside diameter, the inside annular valley separating a first inside sealing annular interface apart from a second inside sealing annular interface, the first inside sealing annular interface disposed adjacent to the first axial side and the second inside sealing annular interface disposed adjacent to the at least one anti-extrusion ring;
• wherein an outside transition between the first axial side and the first outside sealing annular interface is rounded;
• wherein the first outside sealing annular interface is an annular edge formed at an intersection of the rounded transition and the outside annular valley;
• wherein the second outside sealing annular interface is cylindrical and aligns with the outside diameter;
• wherein an inside transition between the first axial side and the first inside sealing annular interface is rounded;
• wherein the first inside sealing annular interface is an annular edge formed at an intersection of the rounded transition and the inside annular valley;
• wherein the second inside sealing annular interface is cylindrical and aligns with the inside diameter;
• wherein the at least one anti-extrusion ring comprises an outer anti-extrusion ring and an inner anti-extrusion ring separated by an extension of the elastomeric seal ring, wherein the outer anti-extrusion ring is configured to be placed adjacent to the gap when the composite seal is disposed within the inside annular groove;
• and
• wherein the elastomeric seal ring and the at least one anti-extrusion ring are formed of different materials.

19) A composite seal configured for a swivel seal assembly, the swivel seal assembly having a first part rotatable about a longitudinal axis in comparison to a second part, wherein the first and second parts cooperatively form an inside annular groove disposed between the first and second parts, the inside annular groove being cylindrically-shaped and aligned about the longitudinal axis, wherein a gap between the first and second parts is connected to the inside annular groove, wherein the composite seal is configured to be disposed within the inside annular groove to seal the gap, wherein the composite seal is configured to be aligned about the longitudinal axis and is delimited by an inside diameter opposite an outside diameter connected by a first axial side opposite a second axial side, wherein the composite seal comprises:

• an elastomeric seal ring bonded to at least one anti-extrusion ring, wherein the at least one anti-extrusion ring is disposed at the second axial side configured to be placed adjacent to the gap when the composite seal is disposed within the inside annular groove;
• wherein the elastomeric seal ring starts from the first axial side and extends longitudinally along the inside and outside diameters until it reaches the at least one anti-extrusion ring;
• wherein the elastomeric seal ring includes an outside annular valley formed along the outside diameter, the outside annular valley separating a first outside sealing annular interface apart from a second outside sealing annular interface, the first outside sealing annular interface disposed adjacent to the first axial side and the second outside sealing annular interface disposed adjacent to the at least one anti-extrusion ring;
• wherein the elastomeric seal ring includes an inside annular valley formed along the inside diameter, the inside annular valley separating a first inside sealing annular interface apart from a second inside sealing annular interface, the first inside sealing annular interface disposed adjacent to the first axial side and the second inside sealing annular interface disposed adjacent to the at least one anti-extrusion ring;
• wherein a transition between the first axial side and the first outside sealing annular interface is rounded;
• wherein the first outside sealing annular interface is an annular edge formed at an intersection of the rounded transition and the outside annular valley;
• wherein the second outside sealing annular interface is cylindrical and aligns with the outside diameter;
• wherein the second inside sealing annular interface is cylindrical and aligns with the inside diameter;
• wherein the first inside sealing annular interface is cylindrical and has a larger diameter in comparison to the inside diameter;
• wherein the elastomeric seal ring and the at least one anti-extrusion ring are formed of different materials;
• and
• wherein the first axial side comprises an annular angle with respect to the longitudinal axis, the annular angle forming the first axial side that is frustoconical in shape that is sloped downwards towards the outside diameter.