Subsurface drilling tool

Abstract

The present invention relates in general to subsurface drilling tools, and more specifically, to a drill bit comprising a ball shaped cutting tool. The drill bit is configured so that a plurality of cones, forming the ball shaped cutting tool, rotate in opposite directions around an axle while the drill bit is drilling or cutting through the ground, rock, or other material. The drilling or cutting is accomplished by a plurality of blade inserts that fit inside and protrude therefrom a plurality of holes covering the exterior of the ball shaped cutting tool. The purpose of the present invention is to provide a new and improved subsurface drilling tool that will efficiently drill hard rock formations.

What is claimed is: 
     
         1 . A drill bit for use in a drilling operation comprising:
 a body comprising an axle;   a wheel comprising a plurality of sections configured to rotate independently about the axle while drilling; and   wherein the diameter of the wheel is greatest at its center.   
     
     
         2 . The drill bit of  claim 1  further comprising a plurality of holes covering the exterior of the wheel. 
     
     
         3 . The drill bit of  claim 2  further comprising a plurality of blade inserts that fit inside the plurality of holes, wherein each blade insert comprises a cutting face and a trailing face. 
     
     
         4 . The drill bit of  claim 1  wherein the plurality of sections are configured such that they tear at an object upon rotation of the sections in opposite directions while engaged with the object. 
     
     
         5 . The drill bit of  claim 4  wherein the wheel is configured to impact into the object. 
     
     
         6 . The drill bit of  claim 4  wherein the wheel is configured to mill the object by scraping the plurality of sections against the object. 
     
     
         7 . The drill bit of  claim 4  wherein the object is a frac plug. 
     
     
         8 . The drill bit of  claim 4  wherein the object is a sliding sleeve. 
     
     
         9 . The drill bit of  claim 1  wherein the body further comprises a plurality of cutters affixed to an outer circumference of the body. 
     
     
         10 . The drill bit of  claim 9  wherein the plurality of cutters reduce friction between the body and a hole created by the bit. 
     
     
         11 . The drill bit of  claim 9  wherein the body is configured to pulverize an object contained within a hole created by the bit as the body rotates and the plurality of cutters engage with the object. 
     
     
         12 . The drill bit of  claim 1  wherein the body and wheel are configured such that they automatically center themselves on an object being drilled within a hole. 
     
     
         13 . The drill bit of  claim 1  wherein torque built up between an object contained within a hole created by the bit and the body is released by rotating the plurality of sections in opposite directions while engaged with the object. 
     
     
         14 . The drill bit of  claim 1  wherein friction built up between an object contained within a hole created by the bit and the body is reduced by rotating the plurality of sections in opposite directions while engaged with the object. 
     
     
         15 . The drill bit of  claim 1  wherein vibration between an object contained within a hole created by the bit and the body is minimized by rotating the plurality of sections in opposite directions while engaged with the object. 
     
     
         16 . The drill bit of  claim 1  wherein the body further comprises a fluid course to supply fluid to the wheel. 
     
     
         17 . The drill bit of  claim 16  wherein the fluid course supplies fluid to the wheel such that the fluid flows around the wheel and washes debris away from the plurality of sections as they rotate. 
     
     
         18 . The drill bit of  claim 17  wherein the flow of fluid around the wheel is such that hydraulic pressure does not prevent contact between the wheel and an object being drilled. 
     
     
         19 . The drill bit of  claim 1  wherein the body further comprises a first end configured for attachment to a drill. 
     
     
         20 . The drill bit of  claim 19  wherein the drill supplies lubricating fluid for lubrication of the axle. 
     
     
         21 . The drill bit of  claim 20  wherein the plurality of sections filter the lubricating fluid by grinding up particles contained within the lubricating fluid. 
     
     
         22 . The drill bit of  claim 19  wherein the body further comprises a plurality of ports formed proximate the first end of the body. 
     
     
         23 . The drill bit of  claim 1  wherein the wheel comprises more than two sections. 
     
     
         24 . The drill bit of  claim 1  wherein the plurality of sections are of equal size. 
     
     
         25 . The drill bit of  claim 1  wherein the plurality of sections are different sizes. 
     
     
         26 . The drill bit of  claim 1  wherein the wheel, axle, and body do not comprise rubber elements. 
     
     
         27 . The drill bit of  claim 1  wherein the wheel, axle, and body do not comprise seals. 
     
     
         28 . The drill bit of  claim 1  wherein the wheel, axle, and body do not comprise grease sealed within the wheel, axle, or body. 
     
     
         29 . The drill bit of  claim 1  further comprising bearings. 
     
     
         30 . The drill bit of  claim 1  wherein the axle is cantilevered.