Convertiball

Abstract

Provided is a plug apparatus, the apparatus including a cone shaped wedge having a first end and a second end and having an inside surface and an outside surface, the cone shaped wedge having, at least in some part, a decreasing diameter on the outside surface and a constant diameter on the inside surface from the first end to the second end, a slip, comprising a tapered inner surface, configured to encircle the second end of the cone shaped wedge, a sealing ring, having an annular body, encircled around the cone shaped wedge and near the first end of the cone shaped wedge, and a mandrel positioned inside the cone shaped wedge, the mandrel having an open cylindrical shape and having a first end and a second end.

What is claimed is: 
     
         1 . A plug apparatus, the apparatus comprising:
 a cone shaped wedge having a first end and a second end and having an inside surface and an outside surface, the cone shaped wedge having, at least in some part, a decreasing diameter on the outside surface from the first end to the second end;   a slip, comprising a tapered inner surface, configured to encircle the second end of the cone shaped wedge;   a sealing ring, having an annular body, encircled around the cone shaped wedge and near the first end of the cone shaped wedge; and   a mandrel positioned inside the cone shaped wedge, the mandrel having an open cylindrical shape and having a first end and a second end, the mandrel comprising:
 an axial mandrel bore; 
 a stopple seat in the axial mandrel bore; 
 a plurality of flow path ports adapted to allow fluid to enter the axial mandrel bore, wherein:
 the plurality of flow path ports are positioned between the first end of the mandrel and the stopple seat; and 
 the plurality of flow path ports are protruded with a 60 degrees angle+/−10 degrees of off the axial mandrel bore; and 
 
 a stopple positioned between the plurality of flow path ports and the first end of the mandrel; and 
 one or more releases configured to releasably fixing the position of the stopple in the axial mandrel bore. 
   
     
     
         2 . The plug apparatus of  claim 1 , wherein:
 the mandrel having an inside surface and an outside surface; and   the plurality of flow path ports are positioned circumferentially around the mandrel, wherein the plurality of flow path ports are configured to direct the fluid from the outside surface of the mandrel to the inside surface of the mandrel and towards the second end of the mandrel.   
     
     
         3 . The plug apparatus of  claim 2 , wherein:
 the releases comprise frangible or shearable parts adapted to fail at an identified pressure; and   the stopple is releasable to seat on the stopple seat by reaching a hydraulic back pressure threshold above the plurality of flow path ports upon failing of the plurality of frangible or shearable parts.   
     
     
         4 . The plug apparatus of  claim 2 , wherein:
 the plurality of flow path ports comprises four identical flow path ports spaced circumferentially at 90 degrees apart from each other.   
     
     
         5 . The plug apparatus of  claim 1 , the cone shaped wedge further comprising:
 a plurality of collet fingers or rods extended axially and spaced circumferentially on the second end of the cone shaped wedge.   
     
     
         6 . The plug apparatus of  claim 5 , the plug further comprising:
 a setting ring having an annular body, the setting ring comprising:
 a plurality of keys arranged circumferentially and protruded radially inward on the setting ring; and 
   wherein the setting ring is positioned slidably around the plurality of collet fingers.   
     
     
         7 . The plug apparatus of  claim 6 , the plug further comprising:
 a gauge ring attached to the plurality of collet fingers or rods and extended around the setting ring.   
     
     
         8 . The plug apparatus of  claim 1 , the slip comprising:
 a plurality of individual slip segments positioned closely adjacent and angularly around the cone shaped wedge.   
     
     
         9 . The plug apparatus of  claim 8 , wherein:
 the individual slip segments are equally spaced.   
     
     
         10 . The plug apparatus of  claim 1 , wherein:
 the stopple comprises a truncated cone portion.   
     
     
         11 . The plug apparatus of  claim 10 , wherein:
 the stopple comprises a solid cylindrical portion.   
     
     
         12 . The plug apparatus of  claim 1 , wherein:
 the stopple has dimensions suitable for being received in the stopple seat, as a means to restrict longitudinal flow passage through the plug apparatus.   
     
     
         13 . The plug apparatus of  claim 1 , wherein:
 the stopple seat comprises a tapered shape facing the first end of the mandrel.   
     
     
         14 . The plug apparatus of  claim 1 , wherein:
 the mandrel comprises an outer wedge seat configured to seat on a mandrel seat.   
     
     
         15 . The plug apparatus of  claim 1 , wherein:
 the diameter of the cone shaped wedge decreases at a constant linear rate, at least in some part, on the outside surface.   
     
     
         16 . The plug apparatus of  claim 1 , the sealing ring comprising:
 a groove configured to receive a plurality of elasticity rings to hydraulically seal a liner.   
     
     
         17 . The plug apparatus of  claim 1 , wherein the slip further comprises:
 a plurality of gripping serrations as a means of locking mechanism to prevent any dismantlement.   
     
     
         18 . A method of plugging a liner bore, the method comprising:
 running a plug into a liner to a location to be plugged, the plug comprising:
 a cone shaped wedge having a first end and a second end and having an inside surface and an outside surface, the cone shaped wedge having, at least in some part, a decreasing diameter on the outside surface from the first end to the second end; 
 a slip, comprising a tapered inner surface, configured to encircle the second end of the cone shaped wedge; 
 a sealing ring, having an annular body, encircled around the cone shaped wedge and near the first end of the cone shaped wedge; and 
 a mandrel positioned inside the cone shaped wedge, the mandrel having an open cylindrical shape and having a first end and a second end, the mandrel comprising:
 an axial mandrel bore; 
 a stopple seat in the axial mandrel bore; 
 a stopple; 
 a plurality of frangible shear screws positioned near the first end of the mandrel; and 
 a plurality of flow path ports adapted to allow fluid to enter the axial mandrel bore, wherein:
 the plurality of flow path ports are positioned between the first end of the mandrel and the stopple seat; and 
 the plurality of flow path ports are protruded with a 60 degrees+/−10 degrees angle of off the axial mandrel bore; and 
 
 
   setting the plug in the liner; and   dropping the stopple into the stopple seat by reaching a hydraulic back pressure threshold in the liner.