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Oil, Gas & Mining vocabulary · Drilling & Wells

Casing

Meaning in oil, gas & mining, with examples

/ˈkeɪsɪŋ/nounCore term

In oil, gas & mining, casing means: Large steel pipe lowered into a newly drilled section of a well and cemented in place to stop the hole collapsing and to keep rock layers and fluids apart.

In Turkish: muhafaza borusu, kasing

How it is used

Wells are built in steps: drill a section, run casing, cement it, then drill deeper with a smaller bit. Each casing string has a size in inches (13 3/8-inch, 9 5/8-inch). Common phrases are run casing, casing shoe, casing string and casing pressure.

Example sentences

  1. We will run the 9 5/8-inch casing tomorrow and cement it on Thursday.

  2. A leak in the casing allowed water into the well.

Common collocations

  • run casing
  • casing string
  • casing shoe
  • cement the casing
  • production casing
  • wellA deep, narrow hole drilled into the ground to find or produce oil, gas or water, or to inject fluids back into a reservoir.
  • drilling mudA specially mixed fluid pumped down the drill pipe and back up the hole to cool the bit, carry rock cuttings to the surface and control well pressure.
  • well completionThe work done after drilling to make a well ready to produce safely, such as running production tubing, perforating the casing and installing valves.
  • wellheadThe steel equipment at the top of a well, at the surface or on the seabed, that holds the casing and tubing and connects the well to valves and flowlines.

More terms: Drilling & Wells

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