Hydraulic fracturing (also hydrofracturing, fracking, or fraccing) is a well-stimulation technique in which rock is fractured by a hydraulically pressurized liquid. A high-pressure fluid (usually chemicals and sand suspended in water) is injected into a wellbore to create cracks in the deep-rock formations through which natural gas, petroleum, and...
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http://en.wikipedia.org/wiki/Hydraulic_fracturing
("Fracking") The process of pumping fluid under pressure underground to fracture rock containing oil or gas. Hydraulic fracturing creates fissures that increase the surface area in order to allow greater quantities of hydrocarbons to flow out of a reservoir.
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Fracturing of rock at depth with fluid pressure. Hydraulic fracturing at depth may be accomplished by pumping water into a well at very high pressures. Under natural conditions, vapor pressure may rise high enough to cause fracturing in a process known as hydrothermal brecciation. Related categor...
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http://www.daviddarling.info/encyclopedia/H/AE_hydraulic_fracturing.html
an operation in which a specially blended liquid is pumped down a well and into a formation under pressure high enough to cause the formation to crack open, forming passages through which oil can flow into the wellbore. Sand grains, aluminum pellets, glass beads, or similar materials are carried in suspension into the fractures. When the pressure is released at the surface, the fractures partially close on the proppants, leaving channels for oil to flow through to the well. Compare explosive fracturing. ...
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A process where a mixture of pressurized water, sand, and a specifically formulated fracturing compound is pumped thousands of feet down into a shale rock formation to create tiny cracks in the rock. These tiny cracks free the trapped oil and natural gas.
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(Hydrofracturing) Fracturing of rock at depth with fluid pressure. Hydraulic fracturing at depth may be accomplished by pumping water into a well at very high pressures. Under natural conditions, vapor pressure may rise high enough to cause fracturing in a process known as hydrothermal brecciation. See also Fracturing.
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https://www.encyclo.co.uk/local/22831
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