Production of lignite from underground deposits

Patent · Tue May 11 00:00:00 EDT 1982

OSTI ID:5218083

Fenstermaker, R W

Lignite is removed from a seam or stratum containing the same in an underground formation by forming within the seam or stratum with aid of a production fluid, which can contain a dispersant or surfactant, a suspension of the lignite in said fluid whereupon the fluid is removed to the surface and the lignite recovered therefrom. The fluid thus recovered is re-used. The production fluid can be heated and/or pulsated and is injected and passed through the formation under conditions to promote the formation of the desired lignite suspension.

• Assignee: Phillips Petroleum Co
• Patent Number(s): US 4328995
• OSTI ID: 5218083
• Resource Relation: Patent File Date: Filed date 25 Apr 1980; Other Information: PAT-APPL-143669
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
HYDRAULIC MINING
LIGNITE
PRODUCTION
AMMONIUM PHOSPHATES
COAL MINING
HEATING
INJECTION
POTASSIUM PHOSPHATES
PULSATIONS
RECYCLING
SODIUM PHOSPHATES
SURFACTANTS
SUSPENSIONS
UNDERGROUND MINING
ALKALI METAL COMPOUNDS
AMMONIUM COMPOUNDS
BROWN COAL
CARBONACEOUS MATERIALS
COAL
DISPERSIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
INTAKE
MATERIALS
MINING
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
POTASSIUM COMPOUNDS
SODIUM COMPOUNDS
012000* - Coal
Lignite
& Peat- Mining