| 单词 | blowout preventer |
| 释义 | > as lemmasblowout preventer blowout preventer n. a heavy valve or assembly (‘stack’) of valves usually fitted at the top of a hole during drilling and closed in the event of a blowout to control the flow.extracted from blowoutn.blowout preventer 4. Oil Industry. In full blowout preventer. A heavy valve or assembly of valves fitted at the top of an oil well during drilling and closed in the event of a blowout. ΚΠ 1916 A. B. Thompson Oil-field Devel. & Petroleum Mining vii. 367 An apparatus which is largely employed with rotaries is what is called a ‘Blow-out Preventer’. 1934 Proc. World Petroleum Congr. 1933 I. 370/2 The main feature is a heavy rubber sleeve packer held in a container which is free to revolve in ball bearings inside the body of the preventer. 1976 Offshore Engineer July 6/4 Shell has recovered, from 130m of water, the blow-out preventer (bop) stack which fell to the seabed while being lowered into position from the rig. 1986 New Yorker 27 Jan. 69/2 The preventer, a huge contraption weighing seven thousand pounds, was in fact in place, but it had been put in upside down. < as lemmas |
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