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Calcium Hydroxide

Brief Introduction:

It is used as a source of calcium and alkalinity in both water- and oil-base drilling fluids.

IME, Hydrated LIME and slaked LIME are all common names for calcium hydroxide [Ca(OH)2]. It is used as a source of calcium and alkalinity in both water- and oil-base drilling fluids. LIME, a widely available commercial chemical, is an economical source of calcium (Ca2+) and hydroxyl ions (OH–).

 

Drilling fluid applications for LIME include: increasing pH; providing excess LIME as an alkalinity buffer; flocculating bentonite muds, removing soluble carbonate (CO 32–) ions; controlling corrosion; and activating fatty- acid, oil-base mud additives.

 

CAUTION: HYDRATED LIME is a strong base and will form high Ph (alkaline) solutions. See product handling information.

 

LIME is used as an economical source of calcium for flocculating bentonite slurries (spud mud) for improved hole cleaning. Since it is only slightly soluble in water, it is used to maintain an excess of insoluble lime in a wide range of both water- and oil-base systems. Excess LIME buffers pH; provides a reserve quantity of calcium to precipitate soluble carbonates; and activates fatty-acid, oil-base additives. LIME is used for both calcium and pH control in gyp and LIME systems. An alkaline pH which is buffered by excess LIME will prevent acidic conditions from occurring which can lead to accelerated corrosion from acid gases. The solubility of LIME increases with increased salinity, but decreases with increased calcium, increased pH and increased temperature.

ITEM

INDEX

Physical appearance

White powder

Purity (as Ca(OH)2)， %

≥90.0

Specific gravity

2.2

Acid insoluble matter content, %

≤1.0

Solubility @ 68°F (20°C)

0.165 g/100 ml water

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