Patent ID: 7819184

Claim:
A logging plug for use in conjunction with coiled tubing for conducting operation in a well, the logging plug comprising: a body having a bore therein for passing the coiled tubing therethrough; a sealing mechanism within the bore for sealing between the coiled tubing and the body, wherein the sealing mechanism comprises a series of seals including an upper ring seal, adjacent an upper cap seal, adjacent a central ring seal, adjacent a lower cap seal, adjacent a lower ring seal; wherein the upper ring seal, central ring seal and lower ring seal each have a flat inner surface configured to seal with an outer surface of the coiled tubing; wherein the upper cap seal and lower cap seal each comprise a cap ring surrounded in the bore by an elastomer o-ring, the cap rings each having a flat inner surface configured to the seal with the outer surface of the coiled tubing; wherein the series of seals, each having flat inner surfaces, defines an elongated inner sealing surface that adapts continuously along its length to changing profiles of the coiled tubing as the coiled tubing is run through the sealing mechanism, to thereby provide a dynamic seal around the coiled tubing.