Patent ID: 7913716

Claim:
A sealing element, comprising: a tube-shaped body of metallic material, a first male sealing member arranged at a first end of the body, a second male sealing member arranged at a second end of the body opposite said first end; at least two intermediate members arranged in series in the body between the first and second male sealing members, each of said intermediate members comprising a protuberance formed in the body and extending around a center axis of the body, each one of said intermediate members being compressible so as to be adapted to store elastic energy when the body is subjected to axial compression; and an internal bore extending through the body, said internal bore extending through the first and second male sealing members and through the intermediate members, wherein the first male sealing member has an external spherical contact surface designed for mating with a corresponding internal conical contact surface of a female sealing member so as to form a fluid-tight seal between the first male sealing member and the female sealing member when their contact surfaces are pressed against each other.