Project Description

Small Size Tubing

Detailed Product Description

Tubing is inserted into wells for production or injection purposes. Typically, tubing with an outer diameter ≤2-1/16″ (52.4mm) is considered small tubing. It is mainly used for water injection, oil production, or extracting gas from oil-bearing layers.

Main Types

  • API Standard:
    • NU (Plain End, Coupled): Not thickened, with couplings.
    • EU (External Thickened, Coupled): Thickened externally, with couplings.
    • IJ (Integral Joint, Uncoupled): With integral joints, without couplings.
  • Non-API:
    • CB-IJ (Direct Connect, Uncoupled): Direct connect design, without couplings.
    • CB-FJ (Direct Connect, Uncoupled, Gas-tight Thread): Direct connect design, without couplings, with gas-tight threads.
  • Main Steel Grades: J55, N80, L80, P110, etc.

Compliance Standards

  • API SPEC 5CT
  • API SPEC 5B

Product Features

  • Ranking of Outer Diameter Size of Joints: EU > NU > IJ > CB-IJ > CB-FJ;
  • Ranking of Inner Diameter Size of Joints: CB-IJ = EU = NU > CB-FJ > IJ;
  • Ranking of Joint Connection Strength: EU > IJ > CB-IJ > NU > CB-FJ;
  • Product Performance depends on: The dimensions of the tubing body (outer diameter, wall thickness), and steel grade.

Product Specifications Range

Outer Diameter: Φ26.67mm ~ Φ48.26mm; Wall Thickness: 3.18mm ~ 3.68mm.