Well drilling bit dressing apparatus and method
OwnerJohn Herkeinventor
Life of this patent
Estimating the term…
Abstract
A dressing apparatus for drill bits such as employed in well drilling operations including a horizontally reciprocating hammer having a die mounted on the end thereof which is relatively narrow in relation to the face of the drilling bit to be dressed. The hammer and die associated therewith are reciprocally guided and the die is provided with teeth on the end thereof to form ridges and grooves in a predetermined pattern on the face of the drilling bit. The drilling bit is supported in a cradle structure which enables the face of the drilling bit to be moved laterally in relation to the die to enable the die to be engaged with the drilling face from one lateral edge to the other.
Claims9
In a well drilling bit dressing apparatus comprising a frame, means supporting a well drilling bit longitudinally on the frame, a single reciprocal hammer mounted on the frame in opposed relation to the bit, said hammer having a die on the end thereof adjacent the bit for impact engagement with the face of the bit, means supporting and guiding the hammer from the frame, and means reciprocating the hammer for impact engagement of the die with the face of the bit, that improvement comprising said die and bit being disposed in the same horizontal plane with the die having a horizontal dimension substantially less than one half the horizontal width of the face of the bit and a vertical dimension generally equal to the vertical width of the face of the bit for impact engagement with only a small surface area of the face of the bit during each impact of the die with the bit face.
The method of dressing a bit consisting of the steps of orienting the generally circular face of the bit in a position for impact engagement with a reciprocating hammer and die having an impact surface having a length substantially equal to a diameter of the face of the bit and a width substantially less than the radius of the face of the bit to be dressed and progressively moving the face of the bit laterally in relation to the path of movement of the hammer and die to progressively impact the hammer and die against various surface portions of the face of the bit, the step of impacting the face of the bit including the steps of maintaining the bit in the same horizontal plane as the hammer and die and adjusting the bit longitudinally for impacting the center portion of the face of the bit with greater impact forces than the impact forces imparted to the side edge portions of the face of the bit.
Dependencies are inferred from the claim text.