TUBULAR VALVING SYSTEM AND METHOD

摘要

A tubular valving system comprising a tubular having a plurality of ports; a plurality of sleeves disposed at the tubular covering the plurality of ports; a plug runnable within the tubular and seatingly engagable with the plurality of sleeves such that attainment of a first pressure applied against the plug and one of the plurality of sleeves causes movement of the one of the plurality of sleeves to thereby uncover at least one of the plurality of ports covered by the one of the plurality of sleeves; at least one of the plurality of sleeves being yieldable to allow passage of the plug upon attainment of a second pressure applied thereagainst; and a plurality of occlusive members occluding the plurality of uncovered ports until a later time and method.