Concrete core for cementing plugs

Abstract

A well plug, comprising a cylindrical body, a plurality of cylindrical fins encircling the cylindrical body, a concrete core disposed within the cylindrical body and a locking feature disposed in the concrete core and configured to lock with an adjacent well plug.

1 - 20 . (canceled). 
     
     
         21 . A well plug, comprising:
 a cylindrical body having a plurality of cylindrical fins encircling the cylindrical body, the cylindrical body forming an interior space;   a solid concrete core disposed within the cylindrical body and filling the interior space; and   a locking feature partially disposed in the concrete core and partially extending from the cylindrical body, the locking feature configured to lock with an adjacent well plug.   
     
     
         22 . The well plug of  claim 21  wherein the locking feature further comprises a plurality of locking sub-features on a first end that partially extends from the cylindrical body. 
     
     
         23 . The well plug of  claim 21  wherein the locking feature further comprises a plurality of locking sub-features on a first end that partially extends from the cylindrical body and a second end that is flat and which terminates in the concrete core. 
     
     
         24 . The well plug of  claim 21  wherein the locking feature further comprises shapes disposed around a circumference of a cavity. 
     
     
         25 . The well plug of  claim 21  wherein the locking feature comprises a uniform cylindrical bore that extends from a first end that partially extends from the cylindrical body and a second end that terminates in the concrete core. 
     
     
         26 . The well plug of  claim 21  wherein the locking feature comprises a uniform cylindrical bore that extends from a first end that partially extends from the cylindrical body and a second end that terminates in the concrete core, and wherein the cylindrical bore continues into the concrete core. 
     
     
         27 . The well plug of  claim 21  wherein the locking feature comprises a uniform cylindrical bore that extends from a first end that partially extends from the cylindrical body and a second end that terminates in the concrete core, and wherein the cylindrical bore continues through the concrete core to a second end of the cylindrical body. 
     
     
         28 . A well plug, comprising:
 a cylindrical body having a first end and a second end and forming an interior cylindrical chamber;   a plurality of cylindrical fins encircling the cylindrical body;   a solid concrete core disposed within the interior cylindrical chamber of the cylindrical body from the first end to the second end of the cylindrical body; and   a locking feature disposed at a first end of the cylindrical body extending partially into the concrete core and partially outside of the concrete core through the cylindrical body.   
     
     
         29 . The well plug of  claim 28  further comprising a second locking feature disposed at the second end of the cylindrical body and extending into the concrete core. 
     
     
         30 . The well plug of  claim 28  wherein the locking feature further comprises a plurality of locking sub-features. 
     
     
         31 . The well plug of  claim 28  wherein the locking feature comprises a plurality of radially-disposed locking sub-features. 
     
     
         32 . The well plug of  claim 28  wherein the locking feature comprises a uniform cylindrical bore that extends from a first end that partially extends from the cylindrical body and a second end that terminates in the concrete core. 
     
     
         33 . The well plug of  claim 28  wherein the locking feature comprises a uniform cylindrical bore that extends from a first end that partially extends from the cylindrical body and a second end that terminates in the concrete core, and wherein the cylindrical bore continues into the concrete core. 
     
     
         34 . A well plug system, comprising:
 a solid concrete core well plug further comprising:
 a cylindrical body having a plurality of cylindrical fins encircling the cylindrical body, the cylindrical body forming an interior space; 
 a solid concrete core disposed within the cylindrical body and filling the interior space; and 
 a locking feature partially disposed in the concrete core and partially extending from the cylindrical body, the locking feature configured to lock with an adjacent well plug; 
   a hollow concrete core well plug with a locking feature; and   wherein the locking feature of the solid concrete core well plug interlocks with the locking feature of the hollow concrete core well plug.   
     
     
         35 . The well plug system of  claim 34  wherein the hollow concrete core well plug comprises a cylindrical body. 
     
     
         36 . The well plug system of  claim 34  wherein the hollow concrete core well plug comprises a plurality of cylindrical fins encircling the cylindrical body. 
     
     
         37 . The well plug system of  claim 34  wherein the hollow concrete core well plug comprises a concrete core disposed within the cylindrical body. 
     
     
         38 . The well plug system of  claim 34  wherein the hollow concrete core well plug comprises a cavity disposed in the concrete core along an axis of the cylindrical body. 
     
     
         39 . The well plug system of  claim 34  wherein the hollow concrete core well plug comprises a second locking feature disposed at a second end in the concrete core. 
     
     
         40 . The well plug system of  claim 34  wherein the locking feature of the solid concrete core well plug and the locking feature of the hollow concrete core well plug each comprise a plurality of locking sub-features.