专利名称：Anti-rotation device for use with well tools发明人：Burney Latiolais, Jr.,Keith T. Lutgring,Samuel
P. Hawkins, III
申请号：US09631436申请日：20000802公开号：US06425442B1公开日：20020730
专利附图：
摘要：A drillable, anti-rotation device for limiting the rotation of a downhole tool,such as a cement plug, when drilling out the down hole tool. The drillable, anti-rotationdevice comprises a drillable sleeve connected within a non-drillable outer tubular
member connected within a pipe string. The sleeve has one or more grooves or otherindentations, and/or one or more ribs or other protrusions extending inwardly within theinterior of the device for gripping or otherwise retarding the rotation of such downholetool.
申请人：FRANK'S INTERNATIONAL, INC.
代理机构：The Matthews Firm
代理人：William E. Johnson, Jr.
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