Patent ID: 6460633
Filing Date: 2002-10-08
Classification: E21B

Abstract:
A side tracking bit providing a flex point, a bit crown of said bit, a face of said bit crown, a bit shank, said flex point being between said bit crown and said bit shank providing a much shorter length than other methods from said face of said bit crown and said flex point that greatly increases the pivotal capability of said bit crown more than other methods when said bit interfaces with the wall of a well hole and greatly increases the side tracking capability of said bit,said bit comprising said bit shank constructed with a straight tubular section with a spherical knob constructed on one end of said tubular section of said bit shank, said spherical knob being larger in diameter than said tubular section, said spherical knob having a concave spherical shaped internal wall with the radius center of said internal wall being the same position as the radius center of said spherical knob, said internal wall having a diameter larger than the internal diameter of said tubular section, a flow port through the wall of said spherical knob, said flow port having the same diameter and axial center as said tubular section of said bit shank, four threaded holes through the wall of said spherical knob and equally spaced around the circumference of said spherical knob and perpendicular to and at maximum distance from the axial center of said tubular section of said bit shank, a connecting tube, four slots through the wall of said connecting tube, said four slots equally spaced around the circumference of said connecting tube, the length of said slots being parallel to the axial center of said connecting tube, one internal end portion of said connecting tube having internal threads, said diameter of said spherical knob is small enough to slip inside of said connecting tube and be in contact with the internal wall of said connecting tube to limit vibration when said bit is in operation, four studs, said studs having one end portion threaded and a pinhole through said studs near the threaded end of said studs, the width of said slots is wide enough for said studs to slip through and still be in contact with the sides of said slots, said studs are screwed into said threaded holes in said spherical knob through said slots, thread end of said studs is long enough for said pinhole to be passed through the internal wall of said spherical knob so a retaining pin can be placed in said pin-hole, a threaded extension on the backside of said bit crown, the center of said threaded extension having a concave cavity, said cavity having a radius the same as the radius of said spherical knob, said spherical knob and said cavity interface and form said flex point of said bit, said flex point provides a pivotal point for said bit crown, an exhaust port through the axial center of said bit crown, said threaded extension being large enough to screw into said internal threads of said connecting tube connecting said connecting tube to said bit crown, a geometric shaped o-ring, the outside rim of said o-ring fits into the corner formed by the interface of the inside wall of said connecting tube and the top of said threaded extension, said o-ring have a internal rim concave curved to interface with said spherical knob, a tool joint connected to the end of said tubular section of said bit shank that extends form said connecting tube.