Wellhead

Wellhead

A wellhead is piece of equipment that exists atop (the exposed area above ground) of a well.

Wellheads are manufactured in a vast variety of manners for numerous purposes which dictate design. Factors that affect wellhead configuration are pressure, temperature, location, well depth, well size, well purpose, expected well life, well control equipment interface, drilling method, etc.

A wellhead serves numerous functions. Some of these are:

1) Means of casing suspension. (Casing is the permanently installed pipe used to line the well hole for pressure containment, collapse prevention etc.)2) Means of casing pressure isolation when multiple casing strings are used3) Means of attaching BOP (Blow Out Preventor) during drilling4) Means of attaching a tree for well control during production, injection, or other operations5) Means of well access6) Means of pump attachment7) Means of tubing suspension (Tubing is removable pipe installed in the well)

ee also

* Christmas tree
* Oil well
* Pumpjack
* Casing
* American Petroleum Institute
* List of oilfield service companies
* Subsea
* Seaboard International (company promote)

External links

* [http://www.glossary.oilfield.slb.com/Display.cfm?Term=wellhead Schlumberger Oilfield Glossary: wellhead]


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Look at other dictionaries:

  • Wellhead — Well head , n. A source, spring, or fountain. [1913 Webster] At the wellhead the purest streams arise. Spenser. [1913 Webster] Our public school and university life is a great wellhead of new and irresponsible words. Earle. [1913 Webster] …   The Collaborative International Dictionary of English

  • wellhead — index source Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • wellhead — [wel′hed΄] n. 1. the source of a spring of water; spring 2. a source; fountainhead 3. the top of a well, as an oil or gas well …   English World dictionary

  • Wellhead —   The point at which the crude (and/or natural gas) exits the ground. Following historical precedent, the volume and price for crude oil production are labeled as wellhead, even though the cost and volume are now generally measured at the lease… …   Energy terms

  • wellhead — /wel hed /, n. 1. a fountainhead; source. 2. Also called wellhouse. a shelter for a well. 3. the assemblage of equipment attached to the opening of an oil or gas well. adj. 4. noting or pertaining to petroleum, natural gas, etc., at the place and …   Universalium

  • Wellhead price —   The value at the mouth of the well. In general, the wellhead price is considered to be the sales price obtainable from a third party in an arm s length transaction. Posted prices, requested prices, or prices as defined by lease agreements,… …   Energy terms

  • wellhead — noun Date: 13th century 1. the source of a spring or a stream 2. principal source ; fountainhead 3. the top of or a structure built over a well …   New Collegiate Dictionary

  • wellhead — noun a) The surface structure of an oil well etc b) The source of water for a stream or well …   Wiktionary

  • wellhead — n. spring; fountain; structure built over a well …   English contemporary dictionary

  • wellhead — well•head [[t]ˈwɛlˌhɛd[/t]] n. 1) a fountainhead; source 2) Also called wellhouse a shelter for a well. 3) min the top of the opening of an oil or gas well • Etymology: 1300–50 …   From formal English to slang

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