Expandable tool with enhanced expansion capability

Details Expandable tool with enhanced expansion capability Expandable tool with enhanced expansion capability

2005-05-26

2010-06-08

Gay, Jennifer H (Department: 3676)

Wells

Expansible anchor or casing

Expansible casing

C166S195000

Reexamination Certificate

active

07730941

ABSTRACT:
An expandable downhole tool features a mandrel that is expanded from within by a swage or other technique. The expansion of the mandrel advances an exterior ring or comparable slidably mounted object against an exterior sleeve that can be impervious or porous. The ring engages a ratchet mechanism to hold its position with respect to the mandrel as the swage advances through the mandrel and expands the ring and the exterior sleeve. The locking of the ring to the mandrel keeps the exterior sleeve from springing back longitudinally as the expansion is concluded.

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Walkevar, S., et al., “Expandable Technology Improves Reliability of Conventional Liner Hanger Systems”, IASC/SPE 99186, Feb. 2006, 1-11.
Klevelaan, M., et al., “Deplolyment of Swelling Elastomer Packers in Shell E & P”, SPE/IADC 92346, Feb. 2005, 1-5.
Chustz, M., et al., “Expandable Liner Installation Avoids Sidetracking Following Production Casing Failure in the Gulf of Mexico,” SPE/ IADC 91923, Feb. 2005, 1-7.

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