T-Frac System Run in System

Abstract

A central slant hub tool is provided which is capable of receiving tubing or a tool such as a drill from the surface and directing the tube or tool laterally outward using an exit line slant surface or directing the tube or tool downward to an area below the tool. In this way, the tool acts as a hub to communicate with both lateral branches and lower zones of the main casing. Fracture window tools may be installed in the lateral and lower branches to selectively open the bores for drilling, testing and/or production or may be sealed by a bridge plug or the like when not in use.

1 . A down hole hub tool for directing down hole tools, comprising:
 the hub tool comprising a substantially cylindrical body having an axial bore extending between a top and bottom of said body, said cylindrical body further having a lateral opening on an outer circumference of the body located between the top and bottom of said body, wherein said lateral opening is in communication with said lateral bore;   said hub tool having an inner surface within said axial bore slanted 15 to 75 degrees from the axis of the hub tool and being adjacent said lateral opening, said slanted surface defining an axial opening within said face coaxial with said axial bore, wherein said axial opening has a radius smaller than said the radius of said axial bore but at least half of the diameter of the axial bore.   
     
     
         2 . A method of operating a downhole well having a vertical well casing, comprising:
 providing a hub tool within said well casing, said hub tool comprising a substantially cylindrical body having an axial bore extending between a top and bottom of said body, said cylindrical body further having a lateral opening on an outer circumference of the body located between the top and bottom of said body, wherein said lateral opening is in communication with said lateral bore;   providing said hub tool with an inner surface within said axial bore slanted 15 to 75 degrees from the axis of the hub tool adjacent said lateral opening, said slanted surface defining an axial opening within said face coaxial with said axial bore, wherein said axial opening has a radius smaller than said the radius of said axial bore;   providing a down hole tool having a radius smaller than said the radius of said axial bore and larger than the radius of said inner surface axial opening;   lowering said down hole tool through said hub tool along said slanted surface and laterally outward through said later opening into the ground laterally surrounding said well casing.   
     
     
         3 . A method of operating a downhole well according to  claim 2 , wherein said down hole tool is a drill. 
     
     
         4 . A method of operating a downhole well according to  claim 2 , further comprising:
 providing a packer tool above and below said hub tool to selectively secure said hub tool within said well casing or allowing the hub tool to move within said well casing.   
     
     
         5 . A method of operating a downhole well according to  claim 2 , further comprising:
 lowering a first run in casing into said well bore and through said inner surface axial opening of said hub tool to communicate with an area of the ground below said well casing.   
     
     
         6 . A method of operating a downhole well according to  claim 5 , further comprising:
 providing an upper reconnect tool connected to said hub tool;   said upper connect tool having a J slot tool for selectively providing tension or compression to said hub tool as said run in casing is lifted up or down;   providing a castle lock tool connected to said hub tool and having upper teeth and lower teeth interlocked for selectively rotating said lateral opening in a desired location or maintaining the later opening in a selected orientation;   lifting said first run in casing to cause a knob on said casing to move said J tool into said tension position to release the upper teeth from the lower teeth on said castle lock;   rotating the lateral opening to the desired orientation;   setting the run in casing down to interlock the upper and lower teeth of the castle lock to maintain the lateral opening in the desired location.   
     
     
         7 . A method of operating a downhole well according to  claim 6 , further comprising:
 using an OBHO tool to orient the lateral window in a predetermined direction.   
     
     
         8 . A method of operating a downhole well according to  claim 5 , further comprising:
 running in a t-frac window system on the run in casing through the hub tool axial opening to a location below the hub tool.   
     
     
         9 . A method of operating a downhole well according to  claim 8 , further comprising:
 running in bridge plug tool to a location above the t-frac window system to terminate fluid communication along the well casing between the t-frac window system and the hub tool.   
     
     
         10 . A method of operating a downhole well according to  claim 5 , further comprising:
 removing the run in casing from the well casing;   inserting a second run in casing having a radius larger than the axial opening to cause the second run in casing to move along the slanted inner surface and out the later window;   installing a second t-frac window system in a later bore laterally outward from the well casing.   
     
     
         11 . A method of operating a downhole well according to  claim 5 , further comprising:
 running in bridge plug tool to a location upstream from the second t-frac window system to terminate fluid communication between the second t-frac window system and the hub tool.   
     
     
         12 . A method of operating a downhole well according to  claim 5 , further comprising
 removing the second run in casing from the well casing.