Drilling fluids

Details Drilling fluids Drilling fluids

2004-05-24

2008-03-18

Bates, Zakiya W. (Department: 3676)

Boring or penetrating the earth

Processes

Boring with specific fluid

C507S136000, C507S140000, C507S143000

Reexamination Certificate

active

07343986

ABSTRACT:
This invention relates to drilling fluids, to drilling lubricants for such drilling fluids and to methods of drilling wells, particularly oil and/or gas wells using such drilling fluids. In particular, the invention relates to the inclusion of lubricants which afford lubrication in drilling fluids in which the lubricant compatibility and/or performance may be adversely affected by other components of the drilling fluid, particularly divalent cations such as calcium, formate salts or highly alkaline components such as alkali silicate.

REFERENCES:
patent: 3716486 (1973-02-01), Perricone
patent: 4776966 (1988-10-01), Baker
patent: 5919738 (1999-07-01), Norfleet et al.
patent: 2003/0125215 (2003-07-01), Schwartz et al.
patent: 1443654 (1976-07-01), None
patent: 2283036 (1995-04-01), None
International Search Report for PCT/GB2005/000719 dated Jul. 5, 2005.

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