Well drilling apparatus

Claim 2

A drill bit deflecting tool comprising a sub having housed therein fluid volume flow responsive means longitudinally movable, at least one movable deflecting blade means and at least one undergauge stabilizer blade means attached to said sub, said movable blade means and said stabilizer blade means being connected with means for allowing independent rotation of said blade means about said sub and maintaining and returning said blades in and into respectively strict angular alignment with said sub when the tool is not in operation, means for transmitting motion of said fluid volume flow responsive means to said movable deflecting blade means, and slidably engaging said undergauge stabilizer blade means attached to said sub, said deflecting blade means constructed and arranged to be undergauge when said tool is not operative and progressively overgauge in response to the longitudinal movement of said fluid volume flow responsive means.

Claim 3

The apparatus of claim 1 wherein said fluid volume flow responsive device comprises a movable venturi section.

Claim 4

The apparatus of claim 1 wherein said fluid volume flow responsive device comprises a movable orifice valve assembly.

Claim 5

The device of claim 1 having two undergauge stabilizer blades and two movable stabilizer blades.

Claim 6

The apparatus of claim 1 having two undergauge stabilizer blades and one movable stabilizer blade.

Claim 7

The apparatus of claim 5 wherein said undergauge stabilizer blades and said movable stabilizer blade are located 120* apart.

Claim 8

The apparAtus of claim 1 having two full gauge stabilizer blades, one undergauge stabilizer blade and one movable stabilizer blade.

Claim 9

The apparatus of claim 7 wherein said two full gauge stabilizer blades and said undergauge stabilizer blade and said movable stabilizer blade are located 90* apart.

Claim 10

Drill bit drive means comprising: a drill string; a tubular sub provided with means for connection to a drill bit at one end and to a drill string at the other to provide fluid communication from said drill string to said drill bit; an orifice valve disposed within said sub responsive to the volume of fluid flow through said sub, movable bearing means outside said sub and operatively connected to said orifice valve for longitudinal movement along the axis of said sub; stationary bearing means attached to said sub below said movable bearing means; at least one undergauge stabilizer blade attached to said stationary bearing means and slidably engaging said movable bearing means; and at least one movable stabilizer blade pivotally attached to said stationary bearing means and engaging said movable bearing means cam-fashion, so that movable stabilizer blade is undergauge when not in use and progressively overgauge responsive to the longitudinal movement of said movable bearing means.

Claim 11

Drill bit drive means comprising: a drill string; a tubular sub provided with means for connection to a drill bit at one end and to a drill string at the other to provide fluid communication from said drill string to said drill bit; an orifice valve disposed within said sub responsive to the volume of fluid flow through said sub, movable bearing means outside said sub and operatively connected to said orifice valve for longitudinal movement along the axis of said sub; stationary bearing means attached to said sub below said movable bearing means; at least one undergauge stabilizer blade attached to said stationary bearing means and slidably engaging said movable bearing means; and at least one movable stabilizer blade pivotally attached to said stationary bearing means and engaging said movable bearing means cam-fashion, so that movable stabilizer blade is undergauge when not in use and progressively overgauge responsive to the longitudinal movement of said movable bearing means.

Claim 12

A drill bit deflecting tool comprising a sub having a plurality of lengthwise slots, said sub enclosing a spring biased volume flow responsive valve in a drilling fluid conduit, said volume flow responsive valve positioned at said slots and provided with sealing means to prevent flow of drilling fluid through slots, a movable bearing means disposed outside of and around said sub and operatively attached to the body of said volume flow responsive valve through said slots for longitudinal movement a stationary bearing means attached around the outside of said sub below said slots, said stationary bearing means carrying at least one undergauge stabilizer blade, said undergauge stabilizer blade slidably engaging said movable bearing means, at least one movable stabilizer blade pivotally attached to said stationary bearing means, said stabilizer blade engaging said movable bearing means on a cam surface such that said movable stabilizer blade is undergauge when not in use and progressively overgauge responsive to the longitudinal movement of said movable bearing means.

Claim 13

A drill bit deflecting tool comprising a sub having a plurality of lengthwise slots, said sub enclosing a spring biased volume flow responsive valve in a drilling fluid conduit, said volume flow responsive valve positioned at said slots and provided with sealing means to prevent flow of drilling fluid through slots, a movable bearing means disposed outside of and around said sub and operatively attached to the body of said volume flow responsive valve through said slots for longitudinal movement a stationary bearing means attached around the outside of said sub below said slots, said stationary bearing means carrying at least one undergauge stabilizer blade, said undergauge stabilizer blade slidably engaging said movable bearing means, at least one movable stabilizer blade pivotally attached to said stationary bearing means, said stabilizer blade engaging said movable bearing means on a cam surface such that said movable stabilizer blade is undergauge when not in use and progressively overgauge responsive to the longitudinal movement of said movable bearing means.

Claim 14

A drill bit deflecting tool comprising a tubular sub with means for connection to a drill bit at one end and to a drill string at the other to provide fluid communication from said drill string to said drill bit, a fluid volume flow responsive device disposed within said sub responsive to fluid volume flow in said sub for movement, a movable ring disposed around the outside of said sub and operatively connected to said fluid volume flow responsive device for movement in response to movement of said fluid volume flow responsive device, at least one undergauge stabilizer blade attached to the exterior of said sub, and at least one movable stabilizer blade pivotally attached at one end to said sub and slidably engaging said movable ring at the other end cam-fashion such that said movable stabilizer blade is undergauge when not in use and progressively overgauge responsive to the longitudinal movement of said fluid volume flow responsive device.

Claim 15

A drill bit deflecting tool comprising a tubular sub with means for connection to a drill bit at one end and to a drill string at the other to provide fluid communication from said drill string to said drill bit, a fluid volume flow responsive device disposed within said sub responsive to fluid volume flow in said sub for movement, a movable ring disposed around the outside of said sub and operatively connected to said fluid volume flow responsive device for movement in response to movement of said fluid volume flow responsive device, at least one undergauge stabilizer blade attached to the exterior of said sub, and at least one movable stabilizer blade pivotally attached at one end to said sub and slidably engaging said movable ring at the other end cam-fashion such that said movable stabilizer blade is undergauge when not in use and progressively overgauge responsive to the longitudinal movement of said fluid volume flow responsive device.

Claim 16

The apparatus of claim 11 wherein said fluid volume flow responsive device comprises a movable venturi section.

Claim 17

The apparatus of claim 11 wherein said fluid volume flow responsive device comprises an orifice valve.

Claim 18

The device of claim 11 having two movable stabilizer blades and one undergauge stabilizer blade.

Claim 19

The device of claim 11 having two full gauge stabilizer blades, one undergauge stabilizer blade and one movable stabilizer blade.

Claim 20

The device of claim 11 having two undergauge stabilizer blades and two movable stabilizer blades.

Claim 21

The device of claim 11 having two undergauge stabilizer blades and one moVable stabilizer blade.

Claim 22

The device of claim 17 wherein said undergauge stabilizer blades and said movable stabilizer blade are spaced at 120* intervals around said sub.