Boring or penetrating the earth – Processes – Boring curved or redirected bores
Patent
1996-10-03
1998-11-24
Kelly, C. H.
Boring or penetrating the earth
Processes
Boring curved or redirected bores
175 62, 175 65, 507140, 507906, 166301, E21B 704, E21B 3100, C09K 700
Patent
active
058395202
ABSTRACT:
A method of increasing the penetration rate of a drill string within a deviated well bore is disclosed. The method includes providing a drill string with a drilling bottom hole assembly, and rotating the bit in order to create the deviated well bore as well as a filter cake on the walls of the well bore. A pill comprising a spherical bead is prepared and pumped down into the well bore. The pill is allowed to migrated to the low side of the bore hole so that tortuosity is reduced. A method of slide drilling, batch drilling, and running a liner in a well is also disclosed utilizing the spherical beads. In the novel methods disclosed, the spherical beads are allowed to migrate to the low side of the bore hole and are allowed to penetrate through the bore hole's filter cake.
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