Coiled tubing connector with internal anchor and external seal
AssigneeBaker Hughes, A Ge Company, LLC
InventorsDavid A. Alexander, Levi B. Oberg, Erik van Steveninck, Brian Voisin, David C. Johnson
Life of this patent
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Abstract
A connector for a coiled tubing end anchors internally and seals externally. The anchor profile is split with a gap to clear an internal spline without need to remove the spline to allow a seal to enter the coiled tubing since the seal is mounted internally to a sleeve that envelops the end of the coiled tubing. Component relative rotation extends the internal anchor radially against the coiled tubing inner wall to secure the connection with the seal engaged to the coiled tubing outer wall.
Claims13
A connection for a borehole tool to a coiled tubing end, comprising:
- the coiled tubing end having an interior surface with an inwardly-projecting spline which extends axially along said interior surface;
- a mandrel having an end sub that extends into the coiled tubing end for anchoring to the interior surface and a seal ring which extends over said coiled tubing end for selectively sealing said mandrel to an outer surface of the coiled tubing end;
- and
- a lock ring having a split which straddles the spline when the end sub is within the coiled tubing end and which is expanded radially toward the interior surface upon a ramp of the mandrel to lock the mandrel within the coiled tubing end.
A well treatment method using a tool connected to a coiled tubing end with a connector, comprising:
- leaving in place a spline inside said coiled tubing end;
- advancing a lock ring on said connector relatively to said spline when a lock ring is in a retracted position;
- providing an axial split in said lock ring to straddle said spline during said advancing;
- radially extending said lock ring into an inside wall of said coiled tubing end to secure said connector to said coiled tubing end.
Dependencies are inferred from the claim text.