A drilling and cementing operation is carried out utilizing a universal fluid comprising blast furnace slag, water, a silicate and a retarder, the components of the drilling fluid being chosen so as to have a dual functionality in promoting the drilling fluid and thereafter in being functional constituents of a cementitious slurry.

Drilling and cementing with blast furnace slag/silicate fluid

A composition suitable for drilling and cementing comprising coal slag, water and drill solids, the components of the drilling fluid being chosen so as to have a dual functionality in promoting the drilling fluid and thereafter in being functional constituents of a cementitious slurry. Also, a method for drilling using a drilling fluid containing coal slag so as to lay down a filter cake which is settable and which is compatible with a subsequent coal slag cementitious slurry.

Coal slag universal fluid

Methods are provided for producing a composition comprising carbonates, wherein the methods comprise utilizing waste sources of metal oxides. An aqueous solution of divalent cations, some or all of which are derived from a waste source of metal oxides, may be contacted with CO2 and subjected to precipitation conditions to provide compositions comprising carbonates. In some embodiments, a combustion ash is the waste source of metal oxides for the aqueous solution containing divalent cations. In some embodiments, a combustion ash is used to provide a source of proton-removing agents, divalent cations, silica, metal oxides, or other desired constituents or a combination thereof.

Methods and systems for utilizing waste sources of metal oxides

A composition suitable for drilling and cementing comprising blast furnace slag, water, a soluble polyalcohol and an insoluble polyalcohol, the components of the drilling fluid being chosen so as to have a dual functionality in promoting the drilling fluid and thereafter in being functional constituents of a cementitious slurry.

Drilling and cementing with blast furnace slag/soluble/insoluble alcohol

A drilling and cementing operation is carried out utilizing a universal fluid comprising blast furnace slag, water and a polyalcohol, the components of the drilling fluid being chosen so as to have a dual functionality in promoting the drilling fluid and thereafter in being functional constituents of a cementitious slurry.

Drilling and cementing with blast furnace slag/polyalcohol fluid

Disclosed is a manufacturing process for converting coal ash slag from a slagging coal gasifier into a marketable cement product having the characteristics and qualities of portland cement. This process comprises the steps of transferring molten slag from a slagging coal gasifier to a melt chamber and reacting it with a mineral containing lime, for example: calcium oxide, calcium hydroxide or calcium carbonate, to form a homogeneous cement product. This cement product is then transferred to a quench chamber where it is allowed to cool and solidify in the form of clinkers, which are later reduced to powder form. This process also provides an efficient means to conserve energy when producing a portland cement and provides an effective and economical way to dispose of a waste product while increasing the cost efficiency of a slagging coal gasifier.

Process for converting coal ash slag into portland cement

A method of mining a seam of rigid hydrocarbonaceous containing mineral such as oil shale or coal whereby essentially complete recovery of the mineral deposit is possible. This method comprises the steps of apportioning the seam into one or more working horizons and extracting from about 15 to about 85 percent of the mineral in a horizon using a room and pillar mining technique. The void areas resulting from the above mining operation are then filled with concrete, which is formed from cement made from spent residue and aggregate comprised of additional spent material. After the void areas are filled the remaining mineral is removed and additional concrete is deposited. Subsequently, an adjacent horizon, either above or below the initial horizon, is excavated by repeating the above steps until essentially all of the mineral deposit is recovered.

Fondriest F Frederick

Papers

Process for converting coal ash slag into portland cement

Method of mining