Halliburton Energy Services, Inc.

Benny E Dawsey

Lonnie Carl Helms

Min Mark Yuan

Stephen Allen Yeldell

Valve systems and methods for inserting into a casing used in a downhole environment are provided. The valve system includes a tool mandrel, a check valve assembly, and a setting system. The setting system includes inner and outer setting mandrels and a slip collar. The inner setting mandrel is located around at least a portion of the tool mandrel and includes a frustoconical outer surface. The outer setting mandrel is located around at least a portion of the inner setting mandrel and includes a frustoconical inner surface. The slip collar is located around at least a portion of the outer setting mandrel and includes a plurality of tabs and each tab includes gripping elements.

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Houston, TX, United States of America

Benny E Dawsey