DTH drilling

См. также в других словарях:

• Drilling rig — For a detailed diagram of a Petroleum drilling rig, see List of components of oil drilling rigs. Drilling rig preparing rock blasting …   Wikipedia

• Down-the-hole drill — A Down The Hole Drill Called DTH in most drilling terms. The down the hole drill is basically a mini jack hammer that screws on the bottom of a drill string. The fast hammer action breaks hard rock into small flakes and dust and is blown clear by …   Wikipedia

• performing arts — arts or skills that require public performance, as acting, singing, or dancing. [1945 50] * * * ▪ 2009 Introduction Music Classical.       The last vestiges of the Cold War seemed to thaw for a moment on Feb. 26, 2008, when the unfamiliar strains …   Universalium

• dance — dancingly, adv. /dans, dahns/, v., danced, dancing, n. v.i. 1. to move one s feet or body, or both, rhythmically in a pattern of steps, esp. to the accompaniment of music. 2. to leap, skip, etc., as from excitement or emotion; move nimbly or… …   Universalium

• Shaft construction — concerns the building of vertical openings such as Raises and Shafts. Shafts are vertical openings used for supplying equipment, personnel, and support systems to the horizontal tunnel where the pipeline is installed. They can be temporary or… …   Wikipedia

• Natural gas — For other uses, see Natural gas (disambiguation). Natural gas extraction by countries in cubic meters per year. Natural gas is a naturally occurring gas mixture consisting primarily of methane, typically with 0–20% higher hydrocarbons[1] …   Wikipedia