Yesterday, the oil and gas explorer said its drill stem test at its Moran-3X exploration well in Papua New Guinea flowed water with traces of oil.
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In a drill stem test, the drill bit is removed and replaced with the DST tool and devices are inflated above and below the section to be tested.
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A valve is opened, reducing the pressure in the drill stem to surface pressure, causing fluid to flow out of the packed-off formation and up to the surface.
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His third well, the " Daisy Bradford No . 3 ", struck " black gold " in the Woodbine sand at 3592 feet on a drill stem test.
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Percussion action is performed by lifting the drill stem with a rope over a pulley, attached to a simple derrick, made with locally available materials, such as wood or bamboo poles.
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Drill stem testing is an oil and gas exploration procedure to isolate, stimulate and flow a downhole formation to determine the fluids present and the rate at which they can be produced.
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Because it's performed before casing is run, open hole drill stem testing can be the most economical way to determine productive capacity, pressure, permeability or the extent of an oil or gas reservoir.
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The third stage places the product or casing pipe in the enlarged hole by way of the drill stem; it is pulled behind the reamer to allow centering of the pipe in the newly reamed path.
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Perhaps the simplest and cheapest of them all is the Baptist well drilling method, which uses lightweight and cheap PVC pipe for most of the drill stem and in which the drill bit doubles as a footvalve.
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In this case, the driller only acts on downstroke, giving an extra push to the drill stem, while the upward movement is assured by other workers, pulling the rope or pushing down the lever, or by a small motor.
