Chesapeake sent a crew to check the water wellhead .
切萨皮克公司派了维修人员来她家检查水井口。
Then there is the cementing of the wellhead , a process which is necessarily tricky .
接着是油井井口的水泥灌浆，这是一项相当棘手的任务。
Before the relief well punctures macondo , engineers may also-if the government allows them-pump some heavy mud down from the now-capped wellhead .
如果政府允许，工程师们在减压井减弱macondo（漏油状况）之前，将从已经封闭的井口注入部分水泥。
An explosion at a bp well in the gulf of mexico in april killed 11 men and caused the world 's biggest civilian oil spill to date , before the wellhead on the sea floor was finally sealed in september .
