Boring or penetrating the earth – Processes – Boring curved or redirected bores
Patent
1982-09-08
1984-06-26
Novosad, Stephen J.
Boring or penetrating the earth
Processes
Boring curved or redirected bores
175323, 175325, 308 4A, E21B 1710, E21B 1720, E21B 1722
Patent
active
044560800
ABSTRACT:
A method and apparatus for drilling straight bores into the earth is made up of a series of articulated joints which are interpositioned between a drill string and drill bit with an enlarged stabilizer member positioned between each pair of joints and the initial or lowermost section between the drill bit and first joint cooperating with the stabilizer members in such a way as to cause the entire assembly to drill on a straight line or course. In one modified form of invention, a stabilizer member is fixed for rotation behind the drill bit to straighten the drilling course, and may be employed alone or in combination with additional stabilizers and joints in the drill string.
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Novosad Stephen J.
Reilly John E.
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