JHK

Specification for Material Selection

Standard Metallurgy

  • Protectors are manufactured from Cast Steel to BS3100 Grade A2 standards.
  • Bolts, barrels and hinge pins are manufactured from alloy steel to ASTM A193 Grade B7M or BS970 H40 standards.
  • Washers are  manufactured from Stainless Steel to BS3100 Grade B4 standards.

Corrosion Resistant Metallurgy

  • Protectors are manufactured from Cast Steel to BS3100 Grade 316 C12 standards.
  • Bolts, barrels and hinge pins are manufactured from Stainless Steel to BS1506 Grade 410S21-760 standards.
  • Washers are manufactured from Stainless Steel to BS3100 Grade 420C29 standards.

Mechanical AND COMPOSITIONAL REQUIREMENTS

Mechanical Properties

Tensile Strength, Yield Strength and Elongation values for the castings shall conform to the values specified in the standards quoted above.  The maximum hardness value shall be HRC 22 in accordance with NACE MR-0175.

Compositional Properties

Chemical analysis values for the castings and fasteners shall be in accordance with the standards quoted above.

Welding Requirements

No structural weld repair on the castings is permitted.

 

OPERATIONAL REQUIREMENTS

The cable protector is constructed to withstand the following loads when correctly installed on the tubing.

  • Rotational Slippage Load  –  4 Tonnes
  • Lateral Load  –  20 Tonnes
  • Axial Slippage Load  –  25 Tonnes
  • Cable Grip  –  Equivalent to 100ft of cable
  • Control Line Grip  –  30lbs

The above load capabilities have been established by the results of extensive tests conducted on typical cross coupling cable protectors.

 

CERTIFICATION AND TESTING

Certification

JHK, together with their Chinese manufacturers operate a Quality Management System, which is in accordance to BS EN ISO9001 : 2008

Design and Testing

JHK employ AutoCAD and SolidWorks design software to create solutions to most well completions. Test criteria include:

  • Radiography of the castings to ASTM E446.
  • MPI testing when required
  • Dimensional inspection
  • Assembly trials
  • Drift testing
  • Visual inspection
  • Cable and Control line slippage testing