Kellys

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Kellys

  • 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

Square kellys sizes:

Kelly size
drive section
  Bore   Drive section length (net of tool joints)  Overall length (with tool joints)Upper  box connectionLower pin connection  Estimated weight
 StandardOption StandardOption StandardOption StandardOption StandardOption
mmmmmmmmkg/pckg/pc
63,531,811,28-12,19-6 5/8 Reg LH4 1/2 Reg LHNC 26NC 26410-
76,244,511,28-12,19-6 5/8 Reg LH4 1/2 Reg LHNC 31NC 31495-
88,957,211,28-12,19-6 5/8 Reg LH4 1/2 Reg LHNC 38NC 38600-
108,071,411,2815,5412,1916,466 5/8 Reg LH4 1/2 Reg LHNC 46 (NC 50)NC 46 (NC 50)825780
133,482,611,2815,5412,1916,466 5/8 Reg LH-5 1/2 FH (NC 56)-1 2501 688
140,082,611,2815,5412,1916,466 5/8 Reg LH-

6 5/8 Reg

(5 1/2 FH)

-  

 Hexagonal kellys sizes:

Kelly size
drive section

  Drive section length

(net of tool joints)

  Overall length

(with tool joints)

Upper  box connectionLower pin connection  Estimated weight
StandardOptionStandardOptionStandardOptionStandardOptionStandardOption
mmmmmmkg/pckg/pc
76,211,28-12,19-6 5/8 Reg LH4 1/2 Reg LHNC 26NC 26450-
88,911,28-12,19-6 5/8 Reg LH4 1/2 Reg LHNC 31NC 31580-
108,011,2815,5412,1916,466 5/8 Reg LH4 1/2 Reg LHNC 38NC 38750700
133,411,2815,5412,1916,466 5/8 Reg LH-NC 46 (NC 50)-1020-
152,411,2815,5412,1916,466 5/8 Reg LH-5 1/2 FH (NC 56)-1320-

Mechanical properties of kellys:

Square kellys OD rangeHexagonal kellys OD range  Yield strength  Tensile strengthElongation
(L=4D)
Hardness
mmmmMPaMPa%HBW
63,5~108,076,2~133,4≥758≥965≥13≥285
140,0152,4≥689≥931≥13≥285

Options:

  • Double kellys
  • Internal coating
  • Hardbanding
  • Other sizes, thread connections, lengths
  • Stress-relief elements in thread connections
  • Thread rolling
  • Phosphating of thread joints

Shipping:

  • Shipped in protective metal covers

 

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