Diagram of a aquot;Christmas treeaquot;, a series of pipes and valves at the top of the casing of an oil well, that controls the flow of oil ... Regardless of whether the well was drilled with an underwater system or mudline suspension system, the operatoranbsp;...
|Title||:||Effects of Offshore Oil and Natural Gas Development on the Coastal Zone|
|Author||:||Library of Congress. Congressional Research Service|