valve, method for actuating a valve, casing column valve for use in fracture operations and method for use in hydraulic fracture of a well

摘要

"valve, method for actuating a valve, casing column valve for use in fracture operations and method for use in hydraulic fracture of a well". The present invention relates to valve (10) for use in hydraulic fracturing by cementing a well which allows cement to flow to the well during the cementing process and, in the open position, allows the fracture fluid be directed through the cement liner to fracture the formation adjacent to the valve (10). valve 10 is constructed to reduce the likelihood that valve 10 will become clogged as a result of cement or other foreign material. 20643211v1