Patent Number: 6,253,846

Title: Internal junction reinforcement and method of use

Abstract: An internal junction stabilizer is formed with an outer dimension less than the internal bore of a junction to be strengthened The stabilizer is inserted into the junction, and expanded into tight fit. Multiple stabilizers may be expanded one inside another to form a laminate for reinforcement in high pressure applications. Each layer of metal expanded to the next outermost section provides an additive effective on the mechanical properties of the junction. Expansion can be performed in a number of ways, including mechanical, hydraulic, explosive methods. Use of directional or selective swaging can be used to further effect a fit. Further embodiments of the invention include the use of sealing compounds, elastomers, and plastics to effect a hydraulic seal and fill gaps for strength purposes.

Inventors: Nazzai; Gregory Richard (Kingwood, TX), Frank; Timothy John (Houston, TX), Coon; Robert Joe (Missouri City, TX)

Assignee: Shell Oil Company

International Classification: E21B 17/00 (20060101); E21B 43/10 (20060101); E21B 43/02 (20060101); F16L 55/16 (20060101); F16L 55/179 (20060101); E21B 017/10 (); E21B 023/00 (); E21B 043/10 ()

Expiration Date: 07/03/2018