Treatment techniques for drill fluids, cuttings and other oil field wastes

Patent · Tue Feb 16 04:00:00 EST 1988

OSTI ID:5238281

Dugat, J W

Process for treatment of oilfield wastes for disposal or recovery, the oilfield wastes including one or more types of drilling mud, drill cuttings and soil solids, petroleum, diesel and other oils, salts, and water, is described comprising separating the liquid components of the oilfield wastes from the solid components therof by filtration to produce a filtrate, treating the filtrate with acid to reduce its pH and with a flocculating agent to flocculate solids therefrom and filtering the flocculated solids from the remaining liquid and combining same with the solid components, heating and incinerating the solid components at a temperature between about 200/sup 0/F. (93/sup 0/K.) and about 1500/sup 0/F. (816/sup 0/K.) with hot gases to produce char solids and flue gas containing materials vaporized from the solid components. The char solids are cooled to a temperature between about 190/sup 0/F. (88/sup 0/K.) and about 350/sup 0/F. (77/sup 0/K.) by heat exchange with air to produce heated combustion air, cooling the flue gas to a temperature between about 200/sup 0/F. (93/sup 0/K.) and about 700/sup 0/F. (371/sup 0/K.) by heat exchange with air to produce condensed materials and additional heated combustion air, burning a fuel with the heated combustion air and the additional heated combustion air to produce the hot gases, and recovering the cooled char solids and the condensed materials for disposal or use.

• Assignee: NOV; EDB-88-098271; NOV-88-006668
• Patent Number(s): US 4725362
• OSTI ID: 5238281
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020800* -- Petroleum-- Waste Management
ACIDIFICATION
CHARS
CHEMICAL REACTIONS
COMBUSTION
CUTTINGS REMOVAL
DIESEL FUELS
DRILLING FLUIDS
ENERGY SOURCES
FILTRATION
FLOCCULATION
FLUIDS
FOSSIL FUELS
FUELS
HIGH TEMPERATURE
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
MEDIUM TEMPERATURE
MINERAL WASTES
OIL WELLS
OXIDATION
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PETROLEUM RESIDUES
PH VALUE
PRECIPITATION
PROCESSING
PYROLYSIS PRODUCTS
REMOVAL
SEPARATION PROCESSES
SOLID WASTES
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WELLS