| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Blowout preventer stack | Mining | 1: Equipment installed at an oil well-head for the purpose of controlling pressures in the annular space between the casing and drill pipe, or in an open hole during drilling operations. Source: European Union. (references) | |
| 2: The assembly of well-control equipment including preventers, spools, valves, and nipples connected to the top of the wellhead. (references) | |||
Source: compiled by the editor from various references; see credits. | Top | ||
