Drill bit method and apparatus

Patent · Tue Aug 19 04:00:00 EDT 1986

OSTI ID:5247745

Davis, K

This patent describes a drill bit having a lower cutting face which includes a plurality of stud assemblies radially spaced from a longitudinal axial centerline of the bit, each stud assembly being mounted within a stud receiving socket which is formed in the bit cutting face. The method of removing the stud assemblies from the sockets of the bit face consists of: forming a socket passageway along the longitudinal axial centerline of the stud receiving socket and extending the passageway rearwardly of the socket; forming a blind passageway which extends from the bit cutting face into the bit body, and into intersecting relationship respective to the socket passageway; while arranging the socket passageway and the blind passageway laterally respective to one another; forming a wedge face on one side of a tool, forming a support post which has one side inclined to receive the wedge face of the tool thereagainst; forcing a ball to move from the cutting face of the bit, into the blind passageway, onto the support post, then into the socket passageway, and into abutting engagement with a rear end portion of the stud assembly; placing the wedge face against the side of the ball which is opposed to the stud assembly; forcing the tool to move into the blind passageway while part of the tool engages the blind passageway and the wedge face engages the ball and thereby forces the ball to move in a direction away from the blind passageway; applying sufficient force to the tool to cause the ball to engage the stud assembly with sufficient force to be moved outwardly in a direction away from the socket, thereby releasing the stud assembly from the socket.

• Assignee: NOV; EDB-86-173016; NOV-85-021017
• Patent Number(s): US 4606108
• OSTI ID: 5247745
• Country of Publication: United States
• Language: English

Related Subjects

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BOREHOLES
CAVITIES
DESIGN
DRILL BITS
DRILLING
DRILLING EQUIPMENT
EQUIPMENT
FABRICATION
INCLINATION
MECHANICAL STRUCTURES
NATURAL GAS WELLS
OIL WELLS
OPERATION
POSITIONING
REPAIR
SPACE DEPENDENCE
SUPPORTS
WEAR
WELL DRILLING
WELLS