Method for displacing oil base drilling muds and/or residues...

Details Method for displacing oil base drilling muds and/or residues... Method for displacing oil base drilling muds and/or residues...

2007-03-13

2007-03-13

Suchfield, George (Department: 3676)

Wells

Processes

Cleaning or unloading well

C166S291000, C507S237000, C507S238000, C507S260000, C507S267000, C507S277000, C507S928000

Reexamination Certificate

active

10932965

ABSTRACT:
Fluid producing wells may be treated with a water-in-oil emulsion for the removal or inhibition of unwanted solid particulates, including pipe dope, asphaltenes and paraffins. Such emulsions are of particular applicability in the displacement of oil base drilling muds and/or residues from such muds from producing wells. The water-in-oil emulsions may optionally contain a dispersing agent as well as a surfactant.

REFERENCES:
patent: 4588845 (1986-05-01), Bull
patent: 4594170 (1986-06-01), Brown et al.
patent: 2002/0130090 (2002-09-01), Symens et al.
patent: 0 559 418 (1993-08-01), None

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