Bit balling treatment

Boring or penetrating the earth – Processes – Chemical reaction with earth formation or drilling fluid...

Reexamination Certificate

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C175S021000, C175S057000

Reexamination Certificate

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11678905

ABSTRACT:
A solid body contains a surfactant and crushed walnut hulls. The solid body is shaped to predetermined dimensions that permit passage through the central interior opening of drill pipe. The solid body dissolves in drilling mud for delivery of a pill to the annulus through the drill bit nozzles. The pill is an effective treatment against bit balling.

REFERENCES:
patent: 4964465 (1990-10-01), Surles
patent: 4984643 (1991-01-01), Isbell et al.
patent: 7268100 (2007-09-01), Kippie et al.
patent: 2006/0081369 (2006-04-01), Kriegel
patent: 0400532 (1990-12-01), None
Roy, S. & Cooper, G.A. “The effect of electro-osmosis on the indentation of clays” Proc of the the 32nd US Rock Mechanics Symposium, Norman, OK, Jul. 1991. pp. 335-344.
Smith, et al., “Hydraulics Optimization Research in Large Diameter Bits Reduces Operator's Variable Costs” AASDE-05-NTCE-58 (2005) pp. 1-10.

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