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Valve for hydraulic fracturing through cement outside casing

  • US 9,121,251 B2
  • Filed: 09/04/2012
  • Issued: 09/01/2015
  • Est. Priority Date: 09/01/2011
  • Status: Active Grant
First Claim
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1. A valve comprising:

  • a housing having an opening;

    a mandrel positioned within the housing and having an opening, a second opening and an inner bore, wherein the opening and the second opening are in communication with the inner bore;

    a sliding sleeve disposed between the housing and the mandrel and blocking fluid communication between the opening in the housing and the opening in the mandrel when the valve is in a closed position and permitting fluid flow between the opening in the mandrel and the opening in the housing when the valve is in an open position; and

    a rupture disk that, upon rupture, permits application of a fluid pressure to actuate the sliding sleeve from the closed position to the open position, wherein the rupture disk is disposed in the second opening and is ruptured by pressure applied from the inner bore and radially outward through the second opening.

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