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USGS CMG InfoBank: Horizontal Drilling

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Comment: 08:17 - 09:11 (00:54)
Source: Annenberg/CPB Resources - Earth Revealed 26. Living With Earth, Part II
Keywords: "Anthony Marino", drilling, "horizontal drilling", oil, reserve, well, "water pressure"

Our transcription: But a new technique, called "horizontal drilling," is now being used to coax oil from partially depleted reserves.
The first step in perforating a horizontal well is to run long pieces of pipe called "perforating guns" into the well.
These perforating guns contain jet charges that will blow holes in the pipe.
The guns are run into the well on the end of well tubing.
Once they're properly positioned across form the formations of where you want to perforate, they're detonated by using water pressure in the well to ignite a firing head that starts the firing chain all the way down the guns.
The guns fire over a 1,300-foot interval in a split second.

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