18-5/8" 106.5# K55 TPQR Seamless Casing (R3) – API 5CT Casing, Premium TPQR Connection

The 18-5/8" 106.5# K55 TPQR Seamless Casing (R3) is a high-strength, large-diameter oilfield casing pipe designed for durability and structural integrity in oil and gas wells. Manufactured from K55 grade steel per API 5CT standard, this casing offers reliable mechanical properties including high axial strength and moderate corrosion resistance.

With a heavier wall thickness (106.5 lb/ft), this version is particularly suited for demanding surface and intermediate casing applications where higher burst and collapse resistance is required. The TPQR premium connection ensures a gas-tight seal, robust torque performance, and resistance to connection failure under thermal cycling or pressure load.

Supplied in Range 3 (R3) length, this casing is ideal for reducing the number of connections and enhancing installation efficiency in long-string designs.

Specifications:

– Outside Diameter: 18-5/8" (473.1 mm)
– Weight: 106.5 lb/ft (158.49 kg/m)
– Steel Grade: K55 (API 5CT)
– Connection Type: TPQR (Premium Thread, Metal-to-Metal Seal)
– Length Range: R3 (Approx. 40–42 ft / 12–13 m)
– Pipe Type: Seamless
– Standard: API 5CT
– Condition: New / Surplus (as specified)
– Certification: Mill Test Certificate & Premium Connection Report available

Performance Notes:
– TPQR premium connection delivers enhanced sealing and torque capacity
– K55 steel offers good tensile strength for surface and intermediate strings
– Increased wall weight enhances pressure containment and mechanical safety margins
– R3 length reduces rig time and improves operational efficiency

Applications:
– High-load surface and intermediate casing strings
– Large-diameter structural and conductor casing
– Onshore and offshore drilling operations
– Zones requiring higher burst/collapse resistance

Availability:
Inquire now for availability and pricing. Documentation including API 5CT compliance, connection inspection reports, and material traceability available upon request.

For further specifications or to inquire about this equipment and ReflowX's logistics services, Please contact ReflowX at info@reflowx.com