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The marcellus shale was penetrated on Saturday the 18th
at a depth of 5010 feet. Williams geologists estimate the
shale zone to be in the area of 275 to 300 feet thick.
The cores look very good with the presence of natural gas.
The rig workers pulled the drill string as shown in a photo
in the previous post. After performing equipment changes
such as changing the bit and other maintenance operations, the
string was lowered and core drilling commenced late Saturday.
Drilling preceded at a rate of thirteen feet per hour. The
special drill bit is 8 3/4 inch diameter with a four inch hole
in the center. A thirty foot section of specialty drill pipe is
attached to the bit. The drill pipe is lined inside with a high
density fiber glass tube. As the bit grinds down through the
marcellus shale, a core of the shale is forced up into the tubing.
When the drill string is pulled the fiberglass tube with the core
inside is pulled from the drill pipe. The cores are then cut into
three foot long sections and logged. The cores are stored on site
until all the core drilling is completed. The cores will then be
shipped to Texas for testing. Tommy Bell, the site manager expects
to have the drilling of the cores completed by Wednesday evening
the 22nd barring any equipment malfunctions.
The first cores from the marcellus shale.