Patent ID: 6513590
Filing Date: 2003-02-04
Classification: E21B

Abstract:
Apparatus for running a tubular member in a wellbore containing drilling fluid using a drill string, comprising:a running tool connected to the top of the tubular member and having an axial bore therethrough; an upper liner wiper plug assembly which is releasably connected to the drill string within the tubular member near the top of the tubular member, said upper liner wiper plug assembly having a bore therethrough and said upper liner wiper plug assembly including a receptacle in said bore for receiving a drill string dart; a lower liner wiper plug assembly which is releasably connected to the upper liner wiper plug assembly within the tubular member said lower liner wiper plug assembly having a bore therethrough and said lower liner wiper plug assembly including a receptacle in said bore for receiving a drill string dart; a drop ball housing which is connected to the lower liner wiper plug assembly below the lower liner wiper plug assembly, said drop ball housing: (a) including a releasable drop ball having a diameter greater than the inside diameter of the drill string; and (b) having ports above the drop ball through which drilling fluid may flow into the bore of the lower liner wiper plug assembly; and float equipment which is attached to the tubular member near the bottom of the tubular member, said float equipment having an axial bore through which drilling fluid may flow, said axial bore having a diameter greater than the inside diameter of the drill string, said float equipment including a plurality of flapper valves which are activated by the drop ball after it is released from the drop ball housing.