CPC E21B 34/142 (2020.05) [E21B 34/063 (2013.01); E21B 2200/06 (2020.05)] | 20 Claims |
1. A flow control configuration comprising:
a housing having an opening;
a port sleeve disposed within the housing and having, in order, a first positively restrained and closed position within the housing, wherein the port of the housing is closed to flow by the port sleeve, a second positively restrained and open position within the housing wherein the port of the housing is open to flow, and a third positively restrained and closed position within the housing, wherein the port of the housing is closed to flow by the port sleeve.
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