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2. Oil well control - Wikipedia

   en.wikipedia.org/wiki/Oil_well_control

   Secondary oil well control is done after the Primary oil well control has failed to prevent formation fluids from entering the wellbore. This process uses "blow out preventer", a BOP, to prevent the escape of wellbore fluids from the well. As the rams and choke of the BOP remain closed, a pressure built up test is carried out and a kill mud ...

3. Core plug - Wikipedia

   en.wikipedia.org/wiki/Core_plug

   The Welch plug is a type of core plug that is made from a thin disc of metal. The Welch plug is dome-shaped and inserted into the casting hole with the convex side facing outwards. [ 6 ] When installed by striking the Welch plug with a hammer, the dome collapses slightly, expanding it laterally to seal the hole.

4. Fusible plug - Wikipedia

   en.wikipedia.org/wiki/Fusible_plug

   A drawing of a fusible plug, showing the tapered core. A fusible plug is a threaded cylinder of metal, usually bronze, brass or gunmetal, with a tapered hole drilled completely through its length. This hole is sealed with a metal of low melting point that flows away if a predetermined high temperature is reached.

5. US factory activity slumps further in December as tariffs loom

   www.aol.com/news/us-factory-activity-slumps...

   U.S. manufacturing activity contracted further in December, with a measure of factory output dropping to the lowest level in more than 4-1/2 years amid worries that higher tariffs would raise ...

6. Women and children scavenge for food in Gaza, UN official says

   www.aol.com/news/women-children-scavenge-food...

   By Emma Farge. GENEVA (Reuters) - Large groups of women and children are scavenging for food among mounds of trash in parts of the Gaza Strip, a U.N. official said on Friday following a visit to ...

7. Surge in walking pneumonia affects these high-risk groups ...

   www.aol.com/surge-walking-pneumonia-affects-high...

   Between March 31 and Oct. 5 of this year, the percentage of cases grew from 1% to 7.2% among children ages 2 to 4, and from 3.6% to 7.4% among those ages 5 to 17, the agency stated.