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专利名称：Float collar发明人：Jerry P. Allamon申请号：US09951828申请日：20010911公开号：US06684957B2公开日：20040203
专利附图：
摘要：The present invention relates to a float collar apparatus for regulating thepassage of fluid through a casing liner or sub-sea casing. Apparatus of the presentinvention is fabricated using plastic flapper valves and sleeve components in contrast toprior art float collar components which are fabricated almost entirely of hard metals. The
use of plastic components in the float collar apparatus of the present invention providesa substantial reduction in time and resources expended during drilling out of the floatcollar once cementing operations are completed. Additionally, the float collar apparatusof the present invention is fabricated from a pre-determined combination of plasticcomponents and metal components thereby ensuring that the improved float collar canstill endure substantial hydrostatic stresses encountered during casing liner running inand cementing operations.
申请人：ALLAMON INTERESTS
代理机构：O'Neil & McConnell, PLLC
代理人：R. Perry McConnell
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