Deployable centralizers

DWPI Title: Well casing assembly for use in oil drilling applications, has gas generating device for generating force upon slide unit for extending slide unit away from housing to cause flexible units to pivot in direction away from direction of force
Abstract: A centralizer assembly is disclosed that allows for the assembly to be deployed in-situ. The centralizer assembly includes flexible members that can be extended into the well bore in situ by the initiation of a gas generating device. The centralizer assembly can support a large load carrying capability compared to a traditional bow spring with little or no installation drag. Additionally, larger displacements can be produced to centralize an extremely deviated casing.
Use: Well casing assembly for use in oil drilling, natural gas, geothermal drilling, and deep earth penetration applications.
Advantage: The assembly supports a large load carrying capability so as to minimize installation drag. The assembly is designed to be easily attached to the casing as the casing is run.
Novelty: The assembly has a centralizer assembly (10) comprising first sleeve (12) comprising an outer housing (22), a gas generating device contained within the housing, and a slide unit (24) partially contained within the housing. A set of flexible units (16) is located between the first sleeve and second sleeve (14), and connects the first and second sleeves. The gas generating device generates applied force upon the slide unit for extending the slide unit away from the housing to cause the set of flexible units to pivot in direction away from direction of the applied force. The housing and the second sleeve are rigidly attached to a well casing (18).
Filed: 2/23/2017
Application Number: US15441058A
Tech ID: SD 12513.2
This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.
Data from Derwent World Patents Index, provided by Clarivate
All rights reserved. Republication or redistribution of Clarivate content, including by framing or similar means, is prohibited without the prior written consent of Clarivate. Clarivate and its logo, as well as all other trademarks used herein are trademarks of their respective owners and used under license.