Re-closable coil activated frack sleeve
AssigneeBaker Hughes, A Ge Company, LLC
InventorsJeffrey B. Koch, David A. Luft, Edward A. Rapin
Life of this patent
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Abstract
A bottom hole assembly for performing a borehole treatment has a plurality of ported valve housings where the housings have an assembly of shifting sleeves. The first sleeve is shifted uphole to open the port in the housing and lock the first sleeve in the ports open position. A second sleeve in the same housing is shifted in the same direction as the first sleeve to close the ports in the housing. The second sleeve has profiles for shifting it up to close the housing ports and back down to reopen the housing ports after closing them.
Claims14
A treatment method for a zone in a borehole, comprising:
- operating at least one port in at least one valve housing, said housing part of a bottom hole assembly comprising multiple spaced said housings in said zone, between open and closed positions;
- moving a first sleeve to open said at least one port;
- moving a second sleeve in the same direction as said first sleeve to close said at least one port;
- and
- moving said first and second sleeves in an uphole direction to first open and then close the at least one port.
A treatment valve for a zone in a borehole, comprising:
- a housing having a passage therethrough and end connections for securing said housing to a tubular string;
- said housing further comprising a lateral port selectively opened and closed with discrete sleeves mounted in said housing;
- and
- said sleeves moving in an uphole direction to open and then close said at least one lateral port.
Dependencies are inferred from the claim text.