drilling stem

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• Drilling engineering — is a subset of petroleum engineering. Drilling engineers design and implement procedures to drill wells as safely and economically as possible. They work closely with the drilling contractor, service contractors, and compliance personnel, as well …   Wikipedia

• Drilling fluid invasion — is a process that occurs in a well being drilled with higher wellbore pressure than formation pressure. The liquid component of the drilling fluid (known as the mud filtrate) continues to invade the porous and permeable formation until the solids …   Wikipedia

• Drilling fluid — This article is about fluids used when drilling a well. For fluids used with drill bits during metal working, see cutting fluid. Driller pouring a foaming agent down the rod string on a drilling rig In geotechnical engineering, drilling fluid is… …   Wikipedia

• Stem cell — Mouse embryonic st …   Wikipedia

• 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

• Drilling mud — In geotechnical engineering, drilling mud, also known as spud mud (when beginning the drilling process), is a drilling fluid used to drill boreholes into the earth. Often used while drilling oil and natural gas wells and on exploration drilling… …   Wikipedia

• stem — 1. n. & v. n. 1 the main body or stalk of a plant or shrub, usu. rising into light, but occasionally subterranean. 2 the stalk supporting a fruit, flower, or leaf, and attaching it to a larger branch, twig, or stalk. 3 a stem shaped part of an… …   Useful english dictionary

• rotary drilling — Drilling a well by the rotation of a bit. A method frequently used in boring for oil. Boring is done by rotation of a bit attached to a steel pipe, which, when so used is called a drill stem. A smaller bore, called a rat hole, sometimes precedes …   Ballentine's law dictionary

• Exploration diamond drilling — Drilling rig capable of both diamond and reverse circulation drilling. Exploration diamond drilling is used in the mining industry to probe the contents of known ore deposits and potential sites. By withdrawing a small diameter core of rock from… …   Wikipedia

• Drill Stem Test — A drill stem test (DST) is a procedure for isolating and testing the surrounding geological formation through the drill stem. The test is a measurement of pressure behavior at the drill stem and is a valuable way to obtain important sampling… …   Wikipedia

• Baptist well drilling — A very simple manual method to drill water wells, meant to be applied by very poor villagers in developing countries, who quickly learn how to drill their wells themselves. The Baptist drilling rig can be built in any ordinary arc welding… …   Wikipedia