Large-Diameter Seamless Steel Pipe Essential for Oil Well Screen and Drilling Operations API Casing

Product Description

API Casing – High-Strength Seamless Steel Pipe for Oil & Gas Wells

API Casing is a premium-grade, large-diameter seamless steel pipe designed to serve as a structural retainer for oil and gas wellbores. It is a critical component in well construction, providing reinforcement to prevent borehole collapse, protect subsurface formations, and ensure safe drilling operations. Once inserted into the wellbore, the casing is cemented in place to maintain well integrity, facilitate drilling fluid circulation, and enable efficient hydrocarbon extraction.

Specifications

Key Features & Specifications

• Material Grades: GR.B, ST52, ST35, ST42, ST45, X42, X46, X52, X56, X60, X65, X70, SS304, SS316, Duplex 2205, 2507, 3507, SUS201, SUS304, SUS316, SUS906

• Size Range: 1/4" to 24" (13.7 mm to 610 mm OD)

• Wall Thickness: 2.87 mm to 16 mm

• Minimum Yield Strength: 35,000 psi (35K) – Higher grades available for high-pressure applications

• Smooth Wall Design: Ensures optimal fluid flow and reduces friction during installation

• Connection Types: STC (Short Thread Coupling), LTC (Long Thread Coupling), BTC (Buttress Thread Coupling), P (Premium Threaded)

Standards & Certifications

• Manufacturing Standards: API 5L, ASTM A106 Gr.B, ASTM A53 Gr.B, ANSI A210, ANSI B36.10M, ASTM A1020, ASTM A179, BS 3059-2, DIN 17175, DIN 1630, DIN 2448

• Certifications: ISO 9001, SGS, CTI, ROHS, BV (Bureau Veritas)

Surface Treatment Options

To enhance durability and corrosion resistance, API Casing pipes are available with various surface treatments, including:

• Black paint

• Varnish coating

• Oiled finish

• Hot-dip galvanized

• Anti-corrosion coatings (epoxy, FBE, 3LPE)

Applications

API Casing is widely used in:

• Oil & Gas Wells: Structural support for wellbores, preventing formation collapse

• Liquid Delivery Systems: High-pressure fluid transportation

• Structural Piping: Construction and industrial applications

• High & Low-Pressure Boiler Tubes: Heat-resistant performance

• Petroleum Cracking: Seamless steel tubes for refinery operations

• Gas & Oil Pipelines: Reliable transportation of hydrocarbons

FAQ

1.who are we?
We are based in Henan, China, start from 2012, There are total about 51-100 people in our factory.
2. how can we guarantee quality?
Always final Inspection before shipment.
3. why should you buy from us not from other suppliers?
Owning 12 years researching experience, our company has following advantages: the advanced R&D technology; the high-qualified workers; the various premium products; the excellent enterprise culture; the superior special customized service.
4. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF;
Accepted Payment Currency:USD,EUR;
Accepted Payment Type: T/T,L/C;

More Details

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Oasis Oil Tools C.,LTD, located in Muye District, Xinxiang City, covers more than 20000 square meters with total RMB 15 million investment. Oasis now has more than 150 staff, among them 6 persons are senior engineer.

We will still adhere to "A good screen makes a good well", "services to customers, satisfied with customers" etc. business philosophy to get mutual development.