The modified drilling cap was used in the drilling and completion on 2 platforms in the cluster of LD oil fields, as a result that the development cost has been reduce effectively.

改造后的钻井帽先后用于旅大油田群2座平台的钻、完井作业，有效地降低了开发成本。

youdao

Crews are slowly pumping heavy drilling mud into a cap on the top of the well, to push down hydrocarbons that are already present in the well pipe.

工程人员正在缓慢地将特殊泥浆注入井口上的控油罩，将油井管道中已经形成的碳氢化合物压在下面。

youdao

The cap halted the oil flow a week before Tropical Storm Bonnie blew through and forced a temporary halt to drilling of a relief well that will seal the leak for good.

封堵油井一周后，热带风暴邦尼来袭，迫使减压井的海上作业暂时停止，而减压井将有益于封堵漏油。

youdao

As he sees it, it was BP that prepared the drilling plan, and it was BP in charge when the drilling concluded and the crew was preparing to cap the well.

FORBES

Even if the costs from drilling are much greater than was recognized pre-spill, that does not make Cap-and-Trade a good policy.

FORBES: A Gulf Spill Reality Check