What are the main functions of oil reserves?

Oil casing (casing) is a kind of pipe installed in the oil well borehole to fix the wellbore wall, isolate the formation layers, 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 and 620mm, and its length also has different specifications and requirements.

The main functions of oil casing include: fixing the well wall: oil casing reinforces the well wall and prevents collapse and side leakage of the well wall. Isolate different layers: Petroleum casing helps prevent the intersection and crossover between different layers and avoid mixing and contamination between different layers. Support wellbore equipment: As the main support component of the oil well, oil casing can support and protect the lower wellbore facilities, such as oil pumps, gas integrated devices, etc. Protection of critical formations: By selecting appropriate casing materials and sizes, oil casings 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 for oil casing are very high. It is necessary to select different specifications of casing according to different strata and drilling conditions, and carry out corresponding anti-corrosion treatment. The selection and use of oil casing must comply with relevant industry standards and safety regulations.