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APPARATUS AND METHODS FOR WELL CEMENTING

  • US 20120031614A1
  • Filed: 08/04/2010
  • Published: 02/09/2012
  • Est. Priority Date: 08/04/2010
  • Status: Active Grant
First Claim
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1. An apparatus for regulating fluid flow during primary cementing of a subterranean well, the well having a borehole and at least one casing string, comprising:

  • i. a cementing plug fitted with at least one membrane,ii. a one-way valve preinstalled inside the plug interior; and

    iii. means to regulate the fluid-flow rate through the plug interior.

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