What is the difference between tubing and casing?

Tubing is used to transport oil or gas and casing insulators protect these tubes. The casing pipeline keeps the main pipe safe. When the pipelines are crossing through any barrier, a link seal helps to seal the penetration. The end seal helps to ensure that nothing enters between the space between a carrier pipe (tubing) and a casing pipe. Link seal is oil, gas, fire, and extreme temperature resistant.

Casing insulators help in preventing:

  1. Contamination of freshwater,
  2. Instability in upper formations,
  3. Isolating zones that have different pressures while drilling.

Casing insulators are horizontal in shape. Casing pipes are made from steel.

Located near rivers, highways, railroads, and other such areas, pipelines are inside casings. Casings size can be 20inches to 7inches run through drilling hole sizes of 24 inches, 17 and a half inches,12 and a half inches, and 8 and a half inches.

Tubing is usually cylindrical in shape. It can be round, rectangular, or square.

Depending on the material of construction, tubing is classified as rigid or flexible based on its outside diameter (OD).

Kind of material used for tubing

  • Metal tubes — Aluminum, types of steel, copper, or other metals.
  • Plastic tubes — Ethyl, polyamides, polyethylene, polytetrafluoroethylene, or polyvinylidene fluoride.
  • Rubber tubes — Natural compounds like polyisoprene or silicone.
  • Glass/quartz tubes
  • Electrical tubing
  • Fiberglass tubing — For extreme temperatures.
  • Mechanical tubing — For stronger cross-sections.
  • Medical tubing — Small in diameter.

Tubing run after drilling. Tubing is safe and cost-effective. Tubing is used for the maintenance of wells during the production phase.

The opening between the carrier pipeline and the casing pipe needs protection from external particles. It can cause corrosion and should be kept dry. The casing end seal help to protect this opening. Sealing cylindrical objects against water or soil is done quickly and permanently with the help of a link seal. Raci pipelines offer a range of solutions that can help protect oil, gas, water, and jet fuel pipelines.

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