13-3/8" 68# K55 Seamless Casing – API 5CT, Standard BTC Connection

The 13-3/8" 68# K55 Seamless Casing is a widely used oilfield tubular designed for surface and intermediate casing applications in oil and gas wells. Manufactured from API 5CT K55 grade carbon steel, this casing offers reliable performance with moderate yield strength, suitable for wells where corrosive exposure and high pressure are not primary concerns.

Seamless manufacturing ensures uniform mechanical integrity and resistance to collapse and tensile failure. The casing is typically supplied with BTC (Buttress Thread & Coupling) connections for a secure, standard threaded joint capable of handling axial loads during installation and operation.

With its 68 lb/ft weight, the 13-3/8" K55 casing provides the structural strength needed to support upper wellbore sections, cementing operations, and protect freshwater aquifers during drilling. It is commonly used in onshore vertical wells and some offshore surface casing programs.

Specifications:

– Outside Diameter: 13-3/8" (339.7 mm)
– Weight: 68 lb/ft (101.2 kg/m)
– Grade: API 5CT K55
– Pipe Type: Seamless
– End Connection: BTC (Buttress Thread & Coupling)
– Range: R2 or R3 (length based on order)
– Material Type: Carbon Steel
– Yield Strength: 55,000 psi (379 MPa) min
– Tensile Strength: ≥95,000 psi (655 MPa)
– Collapse Pressure: Per API 5CT K55 tables
– Coupling OD: Slightly larger than pipe OD
– Thread Sealability: Standard metal-to-metal threaded seal
– Manufacturing Standard: API 5CT
– Applications: Surface casing, intermediate casing, conductor tieback, shallow and medium-depth oil & gas wells

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