Invention Grant
US07640984B2 Method for drilling and casing a wellbore with a pump down cement float 有权
用泵送水泥浮子钻井和套管井筒的方法

Method for drilling and casing a wellbore with a pump down cement float
Abstract:
A cement float collar is disclosed that can be positioned downhole and used in a wellbore completion operation after drilling a wellbore with casing. A wellbore drilling and completion method is also disclosed. The cement float collar is made for pumping downhole and into engagement with a groove formed in the casing, called the profile nipple. As such, no restriction is needed in the casing for accepting or latching the float collar and the portion of casing including the groove can be installed at the start of the drilling operation. In addition, the profile nipple can be used to engage other drilling tools and, therefore, can already be in place when the final well depth (TD) is reached.
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