Drill Collar

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Drill Collar

  • 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

 

Drill collar sizes:

  Pipe body OD   Standard finish  Finish type
Bore ID  Tool joint thread type  Estimated weight Bore IDTool joint thread type Estimated weight
per API  Analog per GOST30 ft     (9,15 m)30 ft     (9,45 m)per APIAnalog per GOST30 ft     (9,15 m)30 ft     (9,45 m)
 inch mm  inch mmkgkginchmmkgkg
3 1/879,41 1/431,8NC 23З-65296306125,42 3/8 RegЗ-66316326
3 1/482,61 1/431,8NC 23З-65325336125,4NC 23 (2 3/8 Reg)З-65345357
3 1/288,91 1/238,1NC 26З-733583701 1/431,8NC 26З-73384397
4 1/8104,8250,8NC 31З-864694851 3/444,5NC 31З-86503520
4 1/4108,0250,8NC 31З-865095261 3/444,5NC 31З-86541559
4 1/2114,3250,8NC 31З-865856051 3/444,5NC 31З-86617638
4 3/4120,72 1/457,2NC 35З-94629650250,8NC 38З-102668690
5127,02 1/457,2NC 38З-102716740250,8NC 38З-102755780
5 1/4133,42 1/457,2NC 38З-102811838250,8NC 38З-102850878
5 1/2139,72 1/457,2NC 38З-102905935250,8NC 38З-102944975
5 3/4146,12 1/457,2NC 40 (4 FH)З-108100910432 13/1671,44 1/2 FHЗ-121905935
6152,42 1/457,2NC 44З-118111411512 13/1671,4NC44 (4 1/2 FH)З-11810111045
6 1/4158,82 1/457,2NC 46З-122122412652 13/1671,4NC 46З-12211231160
6 1/2165,12 1/457,2NC 46З-122134013852 13/1671,4NC 50З-13312371278
6 3/4171,52 1/457,2NC 46З-122102410582 13/1671,4NC 50З-13313551400
7177,82 13/1671,4NC 50З-133148115302 1/457,2NC 50З-13315771630
7 1/4184,22 13/1671,4NC 50З-13316071661376,25 1/2 FHЗ-14715681620
7 1/2190,52 13/1671,4NC 50З-133174117992 3/469,95 1/2 RegЗ-14017521810
7 3/4196,92 13/1671,4NC 56 (6 5/8 Reg)З-14918771940376,2NC 56 (6 5/8 Reg )З-14918481910
8203,22 13/1671,4NC 56 (6 5/8 Reg)З-14920182085376,2NC 56 (6 5/8 Reg )З-14919792045
8 1/4209,62 13/1671,46 5/8 RegЗ-15221682240376,26 5/8 RegЗ-15221272198
8 1/2215,92 13/1671,46 5/8 RegЗ-15223152392376,26 5/8 RegЗ-15222742350
8 3/4222,32 13/1671,46 5/8 RegЗ-15224732555376,26 5/8 RegЗ-15224342515
9228,6376,2NC 61 (7 5/8 Reg)З-163258926752 13/1671,4NC 61 (7 5/8 Reg)З-16326272715
9 1/4235,0376,2NC 61 (7 5/8 Reg)З-163275828502 13/1671,4NC 61 (7 5/8 Reg)З-16327972890
9 1/2241,3376,27 5/8 RegЗ-177292330202 13/1671,47 5/8 RegЗ-17729613060
9 3/4247,7376,2NC 70 (7 5/8 Reg)З-185309832002 13/1671,4NC 70 (7 5/8 Reg)З-18531363240
10254,0376,2NC 70 (8 5/8 Reg)З-185327633852 13/1671,4NC 70 (8 5/8 Reg)З-18533163427

Mechanical properties of drill collars:

 DC OD rangeYield strengthTensile strength  Relative elongation (L=4D) Hardness
mmMPaMPa%HBW
88,9~174,6≥758≥965≥13≥285
177,8~279,4≥689≥931≥13≥285

Drill collar types supplied:

Slick drill collar (analogue Type A)
Drill collar with slip and elevator recesses (analogue Type Б)
Drill collar with slip and elevator recesses with hardbanding  (analogue Type Б/1) 
Drill collar with spiral grooves (analogue Type E)
Drill collar with elevator recesses (analogue Type Л)
Drill collar with elevator recesses  with hardbanding  (analogue Type Л/1)
Drill collar with slip recesses (analogue Type M) 
Drill collar with slip recesses with hardbanding  (analogue Type M/1) 
Drill collar with spiral grooves and elevator recess (analogue Тype ЕЛ)
Drill collar with spiral grooves and elevator recess with hardbanding (analogue Тype ЕЛ/1)
Drill collar with spiral grooves and slip recess (analogue Тype ЕM) 
Drill collar with spiral grooves and slip recess with hardbanding (analogue Тype ЕM/1)
Drill collar with spiral grooves, slip and elevator recesses (analogue Type EH)
Drill collar with spiral grooves,  slip and elevator recesses with hardbanding  (analogue Type EH/1)

Options:

  • Thread rolling
  • Thread connections with stress-relief elements
  • Phosphating of thread joints
  • Internal coating
  • Hardbanding
  • Other sizes, thread connections (including double-shoulder), other lengths
  • Non-magnetic drill collar
  • Low-torque versions of thread connections (for large-OD drill collar)

Shipping:

  • Shipped in bundles up to 5,000 kg bound with steel strap or wire in 4 spots minimum. Non-magnetic DC are supplied in cases

 

 

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