What does a well head do?
Simply put, a wellhead is a system of spools, valves, and assorted adapters that used to provide pressure control of a production well. Its primary purpose is to provide a suspension point and pressure seals for the casing strings that run from the bottom of the hole sections to the surface pressure control equipment.
How does a subsea well work?
Used on offshore oil and gas fields, a subsea tree monitors and controls the production of a subsea well. Fixed to the wellhead of a completed well, subsea trees can also manage fluids or gas injected into the well. Since the 1950s, subsea trees have been topping underwater wellheads to control flow.
What are the types of wellhead?
Two types of wellhead chokes are used. They are (1) positive (fixed) chokes and (2) adjustable chokes. Placing a choke at the wellhead means fixing the wellhead pressure and, thus, the flowing bottom-hole pressure and production rate.
What is a well head in oil and gas?
wellhead in the Oil and Gas Industry The wellhead is the unit at the surface of a well which controls pressure and connects to drilling and production equipment.
What is a subsea well?
1. n. [Well Completions] A well in which the wellhead, Christmas tree and production-control equipment is located on the seabed.
How many subsea wells are there?
In 2014, 328 subsea wells worldwide came onstream or started achieving first production. A subsea well startup refers to the initial operational commencement of a subsea well....Total number of subsea well startups worldwide from 2010 to 2017*CharacteristicNumber of subsea well startups2017**2677 more rows•Jul 6, 2016
What is a water well head?
Introduction. The wellhead is the portion of the water well extending above ground. Because of a contamination risk, state law prohibits buried wellheads. The well cap is designed to keep rainwater, insects, and small animals out of the well.
What are the components of a wellhead?
Generally, the wellhead consists of three components: (1) the casing head, (2) the tubing head, and (3) the Christmas tree. The casing head consists of heavy fittings that provide a seal between the casing and the surface.
What is a wellhead equipment?
The wellhead equipment is the component at the surface of an oil or gas well, which offers the pressure-containing and structural interface for the drilling equipment. It provides pressure seals and suspension point for the casing strings. It forms an integral structure of the well.
What is offshore wellhead?
Offshore wellhead systems are normally more sophisticated in design to handle ocean currents, bending loads, and other loads induced by the environment during the life of the well. Some of these loads are cyclic in nature, so fatigue-resistant designs are desirable, particularly for deepwater developments.
What is well head platform?
Wellhead platform generally is a type of oil platform that houses personnel and machineries to extract oil and natural gas through wells in the ocean bed. A wellhead platform (WHP) may include an integrated deck, utility systems, wellhead systems, helideck and drilling facilities.
What is well head pressure?
Wellhead pressure – pressure at the top of the well, i.e., at its wellhead. It is measured by pressure gauges of the wellhead fittings. There are static and dynamic wellhead pressures.
What are subsea operations?
Any activity underwater and on or under the seabed in the various offshore energy sectors can usually be prefixed by the word “subsea”. Subsea activities began in earnest in the 30's and 40's of the last century with the first offshore oil wells.
What is subsea construction?
Oil and gas fields reside beneath many inland waters and offshore areas around the world, and in the oil and gas industry the term subsea relates to the exploration, drilling and development of oil and gas fields in these underwater locations.
What is subsea processing?
Subsea processing (SSP) can be defined as any handling and treatment of the produced fluids for mitigating flow assurance issues prior to reaching the platform or onshore.
What is a subsea platform?
Subsea production systems are wells located on the sea floor, as opposed to at the surface. Just as in a FPS, the petroleum is extracted at the seafloor, and then “tied-back” to an already existing production platform.