05.07.2009

Sorry, this entry is only available in עברית.

To regain control of a blowout well by installing and closing a valve on the wellhead

A relatively impermeable rock, commonly shale, anhydrite or salt, that forms a barrier or seal above and around a reservoir so that fluids and gas cannot migrate beyond the reservoir

A supply contract between a buyer and a seller, whereby the buyer is assured that he will not have to pay more than a given maximum price.