Abstract:Differential Valves are used in multistage cementing tools to ensure having adequate cement placement and enhanced wellbore isolation. Multistage tools are recommended to use if the formation is unable to support the hydrostatic pressure of the cement column. In cases of lose circulation, multistage tools are used at designated depth to help placing cement all the way to surface.
There are two types of multistage tools: conventional ones that can withstand low-pressure rating and more recently d… Show more
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