Please find below the various components of a drilling rig
Wellhead and christmas tree equipment
The christmas tree or Xmas tree separates the well from the production platform. It is an assembly of valves which control the flow of oil or gas. the assembly commonly contain many branches and shaped some what like a tree, thus its name, christmas tree. The christmas tree sits on top of the well head casing system and represents the interface between the well and the production facility. it allows the surface monitoring and regulation of the production of hydrocarbons from a producing well.
The API 6A standards specify the requirements and gives recommendations for the performance, dimensional and functional interchangeability, design, materials, testing, inspection, welding, marking, handling, storing, shipping, purchasing, repair and remanufacture of wellhead and christmas tree equipment for the use in the petroleum and natural gas industry.
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