Article: Hammers and bits.(Porky's Hole Thoughts)

Article: Texas Inventor Develops Down-The-Hole Hammer
US Fed News Service, Including US State News;  April 24, 2008 ;     494 words ... ... Mansfield, Texas, has developed a method for assembling a down-the-hole hammer. According to the U.S. Patent & Trademark Office: "A down-the-hole hammer includes a casing and a piston movable in the casing between a lowermost ...

Dictionary definition: mud, drilling
A Dictionary of Earth Sciences;      289 words ...mud, drilling During rotary drilling, the fluid mud that is circulated to cool the drill bit , convey rock chippings to the surface, and to ...

Article: Down hole hammer. (Product Info).
National Driller;  December 1, 2002 ;     324 words ...Numa's newly introduced Patriot down-hole hammer line provides penetration and durability for drilling in hard rock conditions. The entire product range holds the capacity to ...

Dictionary definition: down-hole hammer drilling
A Dictionary of Earth Sciences;      294 words ...down-hole hammer drilling A method of drilling a borehole using a pneumatic, percussive hammer drill. The rock is fragmented by repeated impaction ...

Article: Deep-hole hammer range.(PRODUCT SHOWCASE: HAMMERS & ...
National Driller;  September 1, 2008 ;     425 words ...Bulroc's new hammers are designed to operate efficiently and overcome high heads of water in the hole. The combined control tube, diverter and check valve minimize the number of components, reducing the overall length of the hammer for ease of handling. The Hyper DH range will be available shortly

Article: Drilling--from air to mud. (Drilling Fluids).
National Driller;  July 1, 2003 ;     700+ words ...In many parts of the country, there are water well contractors who drill with both air and foam and also use bentonite-drilling fluids. Most of these contractors prefer using air when possible, as it is usually a much faster method as opposed to drilling with mud--especially in hard drilling

Article: Gel strength: the muscle of mud.(Drilling Fluids)
National Driller;  July 1, 2004 ;     700+ words ...One of the most common tests performed on drilling fluids for most any drilling application is the viscosity test. Viscosity gives us an idea of fluid thickness and helps us get a general idea of how much bentonite or other products we have or need in a drilling fluid, but it does not tell us how