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Essay / Research Paper Abstract
3 pages in length. Asbestos – with all its implication for disease to the human body if inhaled – is still utilized as a drilling fluid viscosifier (thickening agent), primarily because of its inherent ability to keep down costs. That asbestos is not nearly as advantageous as clays, which are the predominant choice, speaks to the limited usage this fibrous silicate material – such as a binding agent - can contribute to the drilling process; however, when asbestos is incorporated into the drilling fluid, the cost-saving components are derived from a combination of ready availability and the inexpensive nature of soluble silicates as bonding agents. Bibliography lists 10 sources.
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3 pages (~225 words per page)
File: LM1_TLCAsbestos.rtf
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Unformatted sample text from the term paper:
to keep down costs. That asbestos is not nearly as advantageous as clays, which are the predominant choice (Gray, 1980; Anonymous, 2003; Anonymous, 2001; Anonymous, 2004), speaks to the
limited usage this fibrous silicate material - such as a binding agent (Darley et al, 1988) - can contribute to the drilling process; however, when asbestos is incorporated into the
drilling fluid, the cost-saving components are derived from a combination of ready availability and the inexpensive nature of soluble silicates as bonding agents (PQ Corporation, 2003; PQ Corporation, 2003a). Chrysotile
- hydrated magnesium silicate - is the primary element of commercial asbestos (Gray, 1980), a property that is "incombustible, nonconducting and chemically resistant" (The Australian National Groundwater Data Transfer Standard,
1999). The composition of chyrsotile asbestos - which has the appearance of closely packed "tubular, parallel fibers" (Gray, 1980, p. 546) - presents a positive charge when placed in
water, a characteristic considered unusual by other additive standards. The "brush-heap structure" (Gray, 1980, p. 546) of chrysotiles fibrous composition develops when added to fresh or salt water; bulk
volume is trimmed down by virtue of palletizing, while well site dispersion occurs more rapidly when preshearing is applied. Despite its "adequate carrying capacity" (Gray, 1980, p. 546), filtration
control is a concern when employing chrysotile asbestos in drilling fluid, however, inasmuch as bentonite is typically necessary to combine with it to "provide good hole-cleaning with some filtration control"
(Gray, 1980, p. 546). Those throughout the United States who continue to utilize the cost-saving properties of chyrsotile asbestos typically receive their supply from a limited number of manufacturers, not
the least of which include Canada (Quebec) and California (near Coalinga). According to U.S. Department of the Interiors Mineral Commodity Summaries of 2001, the domestic sales of this cost-saving
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