Oil casing is a type of pipe installed in an oil well hole to secure the wellbore wall, isolate the zone, and support and protect the drilling pipe and oil pipe. Petroleum casing is usually made of steel, manganese steel and other alloy materials, its nominal diameter is usually between 114mm~620mm, the length also has different specifications and requirements.
The main functions of oil casing include: Fixing borehole wall: Oil casing strengthens borehole wall and prevents borehole wall collapse and side leakage. Isolation of different zones: Oil casing helps prevent the intersection and crossing of different zones, avoiding mixing and contamination between different zones. Supporting wellbore equipment: Oil casing is the main support component of the well, supporting and protecting the lower wellbore facilities, such as oil pumps, gas integration, etc. Critical formation protection: By selecting the right casing material and size, oil casing can effectively isolate and protect high-quality resources such as oil and gas in the reservoir, thereby ensuring the quality of oil storage and transportation.
The technical requirements of oil casing are very high, and different specifications of casing should be selected according to different strata and drilling conditions, and corresponding anti-corrosion treatment should be carried out. The selection and use of oil casing should follow the relevant industry standards and safety regulations.
