But for shale gas, once the drill reaches the shale rock underground, the drill bit is turned horizontally to bore a well that stretches through the natural gas producing shale.
And then that allows the gas to flow out of the rock into the well bore.
The cement goes between the outside of the casing and the well bore.
The only way that drilling could have caused communication is through the vertical well bore itself which is cemented and cased.
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About 2, 400 barrels of oil had escaped through the well bore, seeped up into the rock, then escaped through fissures in the seafloor.
And the main way they do it is through what they call hydraulic fracturing, which after they drill the well bore, they perforate it.
Then there is Halliburton, which was contracted to cement the production liner in the well casing, effectively sealing off the reservoir from the well bore.
More fluid was coming out of the well than was going in, a sign that natural gas might have been intruding into the well bore.
These provide access to the central bore of the well underneath most of the heavy valves which should have closed off the flow of oil, but for some reason did not.
Halliburton ( HAL - news - people ), which was contracted to cement the production liner in the well casing, effectively sealing off the reservoir from the well bore.
Normally, when a well begins to flow, the release of pressure cleans up the well bore of contaminants and other debris in the hole during the first few hours it is opened up.
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This is what this data is supposed to monitor, but the well flow evidence would appear to have been ignored, because at this point the BP rig supervisors should have gone to a well kill operation and started to pump heavy mud back into the well bore to restore the primary control mechanism.
And following the intersection of the well bore with those relief wells, they will put heavy mud down there to suppress the pressure of the oil coming up from the reservoir, put a cement plug in and effectively do what I would call a bottom kill, as opposed to the top kill, which was not successful a couple of weeks ago.
During the pumping and displacement of the heavyweight spacer used to displace the mud, a breach in pressure integrity resulted in the undetected loss of drilling mud into the probably uncemented well-bore.
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Before long, the girl had swung around to my seat to demonstrate her double-jointed elbows and thumbs as well as a disturbingly loud clack in her jaw when she opened her mouth full bore.
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So in an attempt not to bore loved ones with a barrage of imagery, I will cull the best photos from my storage drives, as well as those taken by friends and others, and share a short tale associated with that image.
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