down-the-hole drilling
51Conasauga shale gas field — The Conasauga Shale is a geological gas shale formation lying within the Appalachian thrust and fault region of the state of Alabama and consisting of Lower Paleozoic (Cambrian and Ordovician) sedimentary rocks at an approximate 1,000 foot depth… …
52Beaconsfield Mine collapse — The Beaconsfield Mine collapse occurred on 25 April 2006 in Beaconsfield, Tasmania, Australia. Of the 17 people who were in the mine at the time, 14 escaped immediately following the collapse, one was killed, and the remaining two were found… …
53Mallik gas hydrate site — The Mallik Methane Hydrate Site (or Mallik Gas Hydrate Production Research Well, Mallik test well) is located in the Beaufort Sea, Canada. Contents 1 Site Highlights 2 Introduction to the Area 3 General physical and geological description …
54Oil well — The pumpjack, such as this one located south of Midland, Texas, is a common sight in West Texas. An oil well is a general term for any boring through the earth s surface that is designed to find and acquire petroleum oil hydrocarbons. Usually… …
55List of Hollows in Bleach — The Bleach anime and manga feature an extensive cast of beings known as Hollows (虚（ホロウ）, Horō?), the central antagonists of the series. These are malevolent, deceased souls of formerly ordinary humans[1] in the Bleach universe. Much of the series …
56List of pipeline accidents — The following is a list of pipeline accidents: This is an incomplete list, which may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries. Contents 1 Bel …
57Sketches from Late Night with Conan O'Brien — The following is a list of sketches performed on the late night program Late Night with Conan O Brien .Major sketchesActual ItemsA parody of Jay Leno s Headlines segment on The Tonight Show in which Leno finds humorous mistakes in various… …
58List of Doctor Who villains — The War Chief redirects here. For the Age of Empires III expansion pack, see Age of Empires III: The War Chiefs. Zaroff redirects here. For the fictional Richard Connell villain, see The Most Dangerous Game. This is a list of villains from the… …
59Bow drill — The bow drill is an ancient tool. While it was usually used to make fire, it was also used for primitive woodworking and dentistry. It consists of a bearing block or handhold , a spindle or drill , a hearth or fireboard , and a simple bow .… …
60Flat tire — The term flat tire describes the condition whereby a pneumatic tire becomes deflated, such that the metal of the wheel is no longer kept suspended above the ground. This can occur for several reasons: [ [http://www.diynetwork.com/diy/ab… …
