Method of preventing loss of an oil-base drilling fluid dewind the drilling of an oil or gas well into a subterranean formation

Patent · Tue Jun 25 04:00:00 EDT 1985

OSTI ID:6359224

Son, A J; Loftin, R E

A method of drilling a well bore into a subterranean formation containing water with monovalent and polyvalent cations and preventing leak-off into the formation of an oil-base drilling fluid used in the drilling. The method is carried out by adding to an oil-base fluid comprising an oil, water, a weighting agent and an emulsifying agent, a powdered seepage loss reducer selected from the group consisting of an amorphous silicate having a molecular ratio of silicon dioxide to alkali metal oxide in the range of from about 1.5:1 to about 3.3:1 wherein the alkali metal is selected from the group consisting of sodium, potassium, and mixtures thereof, an ammonium soap of a fatty acid having from about 12 to about 22 carbon atoms and mixtures thereof to from the drilling fluid and circulating the drilling fluid containing the powdered seepage loss reducer in the well bore. When the circulation of the drilling fluid containing the seepage loss reducer takes place, the compound reacts with the monovalent and polyvalent cations contained in the formation to form a seal in the formation adjacent to the well bore.

• Assignee: Halliburton, Co.
• Patent Number(s): US 4525285
• OSTI ID: 6359224
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ADDITIVES
ALKALI METAL COMPOUNDS
CARBOXYLIC ACIDS
CHALCOGENIDES
DRILLING
DRILLING FLUIDS
FLUIDS
LEAKS
LOSSES
NATURAL GAS WELLS
OIL WELLS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SILICON COMPOUNDS
SILICON OXIDES
WELL DRILLING
WELLS