Oil Spill Glossary

Berm, Dispersants, Static Kill, and more

by Catherine McNiff
A-Q | R-W

  • Annulus
    The space between the pipe and the wellbore.
  • Biodegradation
    The breaking down of substances by microorganisms, such as oil-hungry Alcanivorax, which use the substances for food and generally release harmless byproducts such as carbon dioxide and water.
  • Berm
    A wall or barrier of sand usually used to protect against flooding along coasts, used to stop oil from washing up on Gulf Coast beaches.
  • Boom
    A temporary floating barrier used to contain an oil spill.
  • Blowout
    An uncontrolled flow of reservoir fluids into the wellbore, and sometimes catastrophically to the surface. A blowout may consist of salt water, oil, gas or a mixture of these.
  • Blind shear ram
    The part of the blowout preventer that can completely seal the well.
  • Blowout preventer (BOP)
    A large valve at the top of a well that may be closed in the event of a problem.
  • Bottom kill
    A procedure in which mud and cement are pumped from deep underground to seal the well permanently.
  • Containment cap
    A collection device engineered to create a seal over an open pipe atop the blowout preventer to funnel leaking oil up to a tanker ship floating above.
  • Crude oil
    Unrefined petroleum or liquid petroleum.
  • Dispersants
    Chemicals, such as Corexit, used to break down spilled oil into small droplets.
  • Fossil fuels
    Fuel, such as oil, formed in the earth from plant or animal remains.
  • Junk shot
    One method of temporarily plugging an oil leak by shooting material such as shredded tires and golf balls into the broken wellhead.
  • Loop current
    Flow of warm ocean water that steers Gulf waters toward Florida.
  • Moratorium
    Suspension of activity.

A-Q | R-W

  • Relief well
    A secondary well drilled to intersect the leaking main well, allowing engineers to intercept the oil flow from the reservoir below and pump in cement and heavy fluids to stop the leak.
  • Rig
    Machine used to drill a wellbore.
  • Riser pipe
    The pipe that connects an underwater wellhead to the drilling rig floating on the surface of the ocean above.
  • Skimmers
    Devices, such as boats, used to remove oil from the water's surface.
  • Slick
    A thin film of oil on the water's surface.
  • Static Kill
    A method of spill containment which involves pumping mud and cement into the damaged well to prevent more oil from leaking into the ocean.
  • Tar balls
    Dense, black sticky spheres of hydrocarbons; formed from weathered oil.
  • Top hat
    A containment device used to cap off the oil.
  • Top kill
    A temporary method of sealing an oil well involving pumping dense mud into the blowout preventer under such high pressure that it forces the leaking oil back into the ground.
  • Wellbore
    A hole drilled for the purpose of extracting oil.
  • Wellhead
    A system of spools, valves and assorted adapters that provide pressure control of a production well. The wellhead is the component at the surface of the wellbore to which the apparatus for extracting the oil is attached. The blowout preventer is at the wellhead.

Information Please® Database, © 2007 Pearson Education, Inc. All rights reserved.

Did you know?
The oldest president inaugurated was Reagan (age 69); the youngest was Kennedy (age 43).


Vote Now for the Children's & Teen Choice Book Awards
Voting is open now through May 3 for the Children's and Teen Choice Book Awards — the only national book awards program where the winning author, illustrator, and books of the year are selected by young readers. Encourage your child to vote for his favorites today!

Find Today's Newest & Best Children's Books!
Looking for newly released books for your child? Try our new Book Finder tool to search for new books by age, type, and theme, and create reading lists for kids!

8 Products to Help Your Family Go Plastic-Free
How can you minimize your family's exposure to harmful chemicals and lessen your impact on the environment? Try swapping out some of your everyday plastic products with these non-plastic alternatives.

Registered for Kindergarten — Now What?
Wondering what to do now that you've signed your child up for kindergarten? Try our award-winning Kindergarten Readiness app! This easy-to-use checklist comes with games and activities to help your child build essential skills for kindergarten. Download the Kindergarten Readiness app today!

stay connected

Sign up for our free email newsletters and receive the latest advice and information on all things parenting.

Enter your email address to sign up or manage your account.

Facebook icon Facebook icon Follow Us on Pinterest

editor’s picks