Seamless casing pipe is a steel pipe used to support the walls of oil and gas wells, ensuring the normal operation of the well after drilling and completion. Each well employs multiple layers of casing based on different drilling depths and geological conditions. Once the casing is in place, cement is used to secure it. Unlike tubing and drill pipes, casings are single-use consumable materials and cannot be reused. As a result, casing consumption accounts for over 70% of all oil well pipes.
Types of Casings
Casings can be categorized based on their usage:
- Surface Oil Casing:
Protects the well from contamination by shallow water and gas layers.
Supports wellhead equipment and maintains the weight of other casing layers.
- Technical Oil Casing:
Separates pressures at different levels to allow normal circulation of drilling fluid.
Protects the production casing.
Enables installation of anti-burst devices, leak-proof devices, and liners in the well.
- Reservoir Oil Casing:
Transports oil and natural gas from the reservoir below the surface.
Protects wells and helps stratify drilling mud.
Typically has an outer diameter ranging from 114.3 mm to 508 mm.
Standards and Packaging
According to the SY/T6194-96 "Petroleum Casing" standard, petroleum casings are categorized and packaged as follows:
Short-Threaded Casing and Coupling
Long-Threaded Casing and Coupling
These standards ensure that the casing pipes meet the necessary specifications for effective performance in oil extraction operations.
United Steel Industry As the most important steel pipe manufacturer and exporter in China, in the past 20 years, we have completed more than 100 projects, with partners in more than 100 countries, and established relationships with oil and gas and EPC companies in many countries business relationship.
For more information about the product price, catalog and rolling mill inspection certificate,
please consult:Email:Sales@usisteels.com
