from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The source of a well or stream.
  • n. A principal source; a fountainhead.
  • n. The structure built over a well.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The surface structure of an oil well etc
  • n. The source of water for a stream or well

from the GNU version of the Collaborative International Dictionary of English

  • n. A source, spring, or fountain.

from The Century Dictionary and Cyclopedia

  • n. The source of a natural well or spring.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a structure built over a well
  • n. the source of water for a well


Sorry, no etymologies found.


  • The worst case scenario, if the wellhead is lost, could be 6 million barrels a day, or 4 Exxon Valdezes per week.

    Unnatural Disaster « Gerry Canavan

  • He suspects a part of the pipe installation known as the wellhead, which sits on the seafloor, may have failed, releasing large amount of gas, he said.

    Delayed Cement Plugging Is a Focus

  • If they are indeed communicated, pressure will build on the wellhead, which is exactly what's happening.

    Robert L. Cavnar: Adm. Allen Confused -- So, Now, Everybody Else Is, Too

  • Currently the major op at the wellhead is a dome where some of the oil is being captured and pumped to vessels at the surface the rest is overflowing the containment vessel.

    Obama’s Oil Spill Sleights of Hand | RedState

  • The wellhead is the last component to be constructed.

    6. Water sources, their protection and development

  • The typical well in the Iron Idle program is finished with a wellhead, which is the top of the metal lining, and perhaps a device called a tree, a faucet-like rig equipped with valves to open and shut the flow of hydrocarbons during production.

    The Seattle Times

  • Booming and skimming operations will be affected by winds and waves, even though the wellhead is a good 400 miles from the storm center, now about 150 miles southeast of - News

  • The removal of the cap means that the wellhead, which is 5,000 feet below the surface, was pouring oil unabated into the Gulf. - Top Stories

  • The casing is a pipe that runs through the wellbore from the reservoir 13,000 feet below the seafloor to the wellhead, which is on the seafloor under 5,000 feet of water. Chronicle

  • It would not even be able to get close to the wellhead, which is 5,000 feet below the surface. Home Page

Wordnik is becoming a not-for-profit! Read our announcement here.


Log in or sign up to get involved in the conversation. It's quick and easy.

  • Boy Electrocuted Near Water Hydrant
    Electrician Says Water Wellhead Was Energized

    June 26, 2011