1)  Visual Tube

  • Full length visual examination of the inside and outside surfaces of used tubes
  • Evaluating Straightness, mechanical or corrosion damage, debris such as scale or drilling mud

2)  OD Gage Tube

  • Full length mechanical gauging of the outside diameter of used drill pipe tubes
  • Evaluating Diameter variations caused by excessive wear or mechanical damage, expansions caused by string shot, reductions caused by over pull.

 3)  UT Wall Thickness

  • Wall thickness is measured around one circumference of the drill pipe tube using an ultrasonic thickness gage
  • Evaluating Tube wall thickness below the specified acceptance limits, minimum cross-sectional area of the tube.

 

4)  Electromagnetic – 1 (EMI – I)

  • Full length scanning (excluding upsets) of drill pipe tube using the longitudinal field (transverse flaw) buggy type unit
  • Evaluating Flaws such as fatigue cracks, corrosion pits, cuts, gouges, and other damage that exceed the specified acceptance limits

5)  Electromagnetic -2 (EMI –II)

  • Full length scanning (excluding upsets) using a unit (Four function system) with longitudinal magnetic field EMI (transverse flaw), transverse magnetic field EMI (longitudinal flaw), grade verifier and Hall effect system for measuring wall thickness capabilities
  • Evaluating Flaws such as fatigue cracks,    corrosion pits, cuts, gouges, reduction of wall  thickness, other damage that exceeds the specified acceptance limits and grade  verification.

 

6)  MPI Slip/Upset 

  • Examination of the external surface of drill pipe and HWDP upsets and slip areas using the active-field AC yoke dry /wet magnetic particle technique.
  • Evaluating Flaws such as fatigue cracks, corrosion pits, cuts, gouges, and other damage that exceed the specified acceptance limits.

7)  UT Slip/Upset

  • Examination of Drill Pipe and HWDP upsets and slip areas using shear wave ultrasonic equipment.
  • Evaluating Flaws such as fatigue cracks, corrosion pits, cuts, gouges, and other damage that exceed the specified acceptance limits.

8)  Visual Connection

  • Visual examination of connections, shoulders, and tool joints and profile check of threads, measurement of box swell
  • Evaluating Handling damage, indications of torsional damage, galling, washouts, fins, visibly non-flat shoulders, corrosion, weight/grade markings on tool joint and pin flat.

9)  Dimensional – 1

  • Measurement or Go-No-Go gauging of box OD, pin ID, shoulder width, and tong space
  • Evaluating torsional capacity of Pin and Box, torsional matching of tool joint and tube, adequate shoulder to support makeup stresses, adequate gripping space for tongs

10) Dimensional – 2

  • Dimensional – 1 requirement plus measurement or Go-No-Go gauging of pin lead, counterbore depth, box counterbore, pin flat length, bevel diameter, seal width and shoulder flatness
  • Evaluating Same as dimensional – 1, plus evidence of torsional damage, potential box thread engagement with pin flat, excessive

       shoulder width, sufficient seal area to avoid galling,

       non-flat shoulders.

11) Black light Connection

  • Fluorescent wet magnetic particle inspection using active DC current.
  • Evaluating Fatigue Crack.