Heavy Weight Drill Pipe

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Heavy-wall drill pipe:

  • Standard: API Spec 7-1, manufacturer's TU technical specifications
  • Protection: No coating, or external lacquer coating. Metal thread protectors applied on each joint
  • Marking: Depending on requirements of standard or customer, tubulars are marked using stamp or paint
  • Length: Joints supplied are 9.45 m long

 

Heavy-wall drill pipe sizes:

  Pipe OD  Pipe ID  Outside tool joint diameter

  Internal tool joint diameter

  Connection  Central upset diameter
 inch  mm

 

 inch        

mminchmminchmminchmm
3 1/288,92 1/457,24 3/4 (4 7/8, 5)120,6 (123,8, 127)2 1/457,2NC384  101,6
2 1/1652,42 1/1652,4
4  101,62 1/263,55 1/4133,42 1/263,5NC404 1/2114,3
2 9/1665,12 9/1665,1
4 1/2114,32 11/1668,36 1/4158,82 11/1668,3NC465  127,0
2 3/469,92 3/469,9
2 13/1671,42 13/1671,4
5  127,03    76,26 5/8168,33    76,2NC505 1/2139,7
5 1/2139,73 1/482,67 (7 1/4, 7 1/2)177,8 (184,1, 190,5)3 1/482,65 1/2 FH6  152,4
3 3/885,73 3/885,7
3 7/898,43 7/898,4
4    101,64    101,6
6 5/8168,34    101,68 (8 1/4, 8 1/2)203,2 (209,5, 215,9)4    101,66 5/8 FH7 1/8181  
4 1/2114,34 1/2114,3
5    127,05    127,0

Mechanical properties of integral heavy-wall drill pipe:

  Tool joint OD range  Yield strength  Tensile strength

Elongation

(L = 4D)
 Hardness
mmMPaMPa%BHN
88,9~127≥758≥965≥13≥285
139,7~168,3≥689≥931≥13≥285

Options:

  • Welded heavy-wall drill pipe (with welded tool joints)
  • Internal coating
  • Hardbanding
  • Stress-relief elements in thread connections
  • Thread rolling
  • Phosphating of thread joints
  • Other lengths, other thread connections (including double-shoulder)
  • Extra central upsets
  • Spiral grooves in central upset

Shipping:

  • Shipped in bundles up to 5,000 kg bound with steel strap or wire in 4 spots minimum

 

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