Casing pipe is a type of steel pipe used in drilling and well construction to stabilize and protect the wellbore. 

It is an essential component in oil, gas, and water wells, ensuring structural integrity and preventing contamination.

Key Functions of Casing Pipe:

• Wellbore Stability – Prevents the collapse of the drilled hole.

• Contamination Prevention – Isolates different geological layers to avoid fluid mixing (e.g., oil, gas, and groundwater).

• Pressure Control – Helps manage underground pressures during drilling and production.

• Corrosion & Wear Protection – Shields the well from corrosive fluids and abrasive formations.

• Support for Equipment – Provides a stable structure for installing pumps, valves, and other well components.

Types of Casing Pipe:

• Conductor Casing – First layer, prevents shallow formations from caving in.

• Surface Casing – Protects freshwater zones and anchors blowout preventers.

• Intermediate Casing – Isolates problematic zones (e.g., high-pressure or unstable formations).

• Production Casing – Final layer through which oil or gas is extracted.

• Liner Casing – A shorter casing hung from the intermediate or production casing.

Materials & Specifications:

• Made from carbon or stainless steel.

• Available in various diameters, weights, and grades (e.g., API 5CT standards).

• Can be threaded, welded, or cemented in place.

Casing pipes are crucial for safe and efficient drilling operations, ensuring long-term well integrity. Let me know if you need details on a specific type or application!