Cementing fills and seals the annulus between the well casing and the drilled hole.
The suspected cause of the incident, which occurred just before midnight Tuesday, is a cracked well casing.
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In working to expand mining of the cavern, the company made a cut in the well casing several hundred feet above its top, said Chustz.
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.
To get at the oil and gas trapped in shale, drillers use powerful hydraulic pumps to force water and chemicals through holes punched in the concrete-and-steel well casing.
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.
And then they send down a very high-speed injection of water into the well casing, and of course that flows into the rock and it puts little - tiny little hairline cracks in the rock, opens it up.
This well failed its casing integrity test and nothing was done.
The other process, still in use, is to cut a window in an old well's steel casing and then drill horizontally into the oil zone.
It has the same magnesium VaporMg casing, as well as the same kickstand, neat clicking sound and all.
The cement goes between the outside of the casing and the well bore.
Suffice to say, it feels well-built, which makes sense, as the casing is fashioned entirely out of aluminum.
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"We have known for some time that the cement used to secure the production casing and isolate the hydrocarbon zone at the bottom of the Macondo well must have failed in some manner, " the letter said, noting that BP used a "nitrogen foam cement" recommended and supplied by Halliburton.
It offers an ultralight durable casing and an integrated kickstand and cover that allow customers to be productive anywhere, as well as a full-sized USB port and microSDXC card slot for adding additional storage and a 16:9 widescreen high-definition display that makes it optimal for viewing and sharing content easily.
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