Control Line

Product description

Prysmian Downhole Technology’s control line (hydraulic tubing) range is engineered for demanding environments, emphasizing our commitment to strength, corrosion resistance, and dependable performance essential for well operations. PDT’s control lines are manufactured and tested to meet or exceed ASTM standards, reflecting our technical expertise and reliability. We offer four types of control lines, each with manufacturing processes tailored to balance cost and technical requirements, ensuring optimal solutions for industry professionals.

 

Construction 

Outer Tube Materials

  • 316L Stainless Steel
  • A825 Alloy
  • A825 Alloy Enhanced Properties
  • Duplex 2205/2507
  • Alloy 625

Standard Sizes

  • 1/8" x 0.028" & 0.035"
  • 1/4" x 0.035", 0.049" & 0.065"
  • 3/8" x 0.035", 0.049" & 0.065"
  • 1/2" x 0.049", 0.065" & 0.083"
  • 5/8" x 0.049", 0.065" & 0.083"

 

Manufacturing Methods

Outer Tube Materials

A flat strip is formed into a tube through a series of rollers into a round shape and longitudinally welded to size, with no additional work.

 

Welded & Drawn 

After welding, the tube is drawn through a reduction die to homogenize the seam weld. The weld seam is reworked externally
by the die. By drawing through a die, the tube has an improved sealing surface, a truly round OD and an improved external
surface finish.

 

Welded & Floated Plug Drawn

After welding, the tube is drawn through a die with a floating plug in the bore to rework the weld seam. The plug is not attached to a rod or mandrel, but “floating” inside the tube surrounded by lubricant. The weld seam is reworked internally and externally by the die. By drawing through a die, the tube has an improved sealing surface, a truly round OD and a better internal and external surface finish. This tubing is referred to as “smooth” bore.

 

Seamless

A billet of metal is extruded into a tube and drawn to the final size. There is a longitudinal weld with a seamless tube, although orbital welds are used to manufacture long lengths. The manufacturing process for the seamless tube limits the maximum continuous length; orbital welds are required to join lengths of seamless coil to achieve lengths suitable for well applications.

 

Non-destructive Testing

Eddy current testing (ECT) is performed on the longitudinally seam-welded tubing and strip splice welds at intermediate sizes in the as-heat-treated condition. Radiographic testing is performed on all orbital welds, and strip splice welds are detected by ECT at intermediate size in the as-heat-treated condition. Yield pressure hydrostatic testing is performed on the cold-worked tubing at the final size.

Product datasheet