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The things you see on back roads

CJD3

*Supporting Member*
10,854
190
63
NE Ohio
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This 24" Tri-Cone bit is an animal!

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From the top
24" tri-cone bit-
18" tri- cone bit
28" hammer bit
18" hammer bite

Just for drilling through the upper hole.
Where I'm at, the larger drills down around 270' through all water tables.
The 18" goes to around 450' for the mine string.
Then a 12.5" for intermediate string and lastly, 8.5" the rest of the way which can go out to 17-19,000' TD
 
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CJD3

*Supporting Member*
10,854
190
63
NE Ohio
Another angle
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These Marcellus wells go to around 6-6,500 ft before they turn to start the horizontal run. In sw pa, that's around 370-390 million years ago. ( when the formation would have been on the surface)
Crazy when you only have to dig 2-3" for a civil war bullet.
 

CJD3

*Supporting Member*
10,854
190
63
NE Ohio
Sometimes the hammer bit will create a ledge jumping around that prevents the casing from going in. When that happens, they will go back in with a "reaming tool" .

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