In early August, owner BP used cement and mud to plug the damaged Gulf of Mexico well.

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Importantly, this mud also acts as a kind of plug in the hole, preventing any oil and gas from blasting up out of the hole.

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And in some regions, cottonseed hulls are processed into oil-drilling mud, a sticky, industrial-strength type of Play-Doh that is used to plug leaks in oil wells.

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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.

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