Patent ID: 11959567
Assignee: DRIL-QUIP, INC.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  E | IPC E  F

Claim 0:
1. A system, comprising:
an upper compound hub flange comprising an aperture, an inner hub face, and an outer hub face, wherein the outer hub face is arranged radially outward with respect to the inner hub face;
a lower compound hub flange adjacent the upper compound hub flange and having an aperture extending therethrough, wherein the aperture is aligned with the aperture of the upper compound hub flange, wherein the lower compound hub flange further comprises an inner hub face and an outer hub face, wherein the inner hub face and the outer hub face of the lower compound hub flange are disposed adjacent to the inner hub face and the outer hub face of the upper compound hub flange, and wherein each of the apertures is arranged radially outward with respect to each of the outer hub faces; and
a bolt extending through the apertures of the upper compound hub flange and the lower compound hub flange to couple the upper compound hub flange to the lower compound hub flange;
wherein a circumferential groove is formed between the inner hub faces of the upper and lower compound hub flanges and the outer hub faces of the upper and lower compound hub flanges when the bolt couples the upper compound hub flange to the lower compound hub flange, wherein the circumferential groove does not provide a sealing surface; and
wherein there is a gap between the outer face of the upper compound hub flange and the outer face of the lower compound hub flange.