Tool Joints

The enlarged and threaded ends of joints of drillpipe. These components are fabricated separately from the pipe body and welded onto the pipe at a manufacturing facility.

The tool joints provide high-strength, high-pressure threaded connections that are sufficiently robust to survive the rigors of drilling and numerous cycles of tightening and loosening at threads. Tool joints are usually made of steel that has been heat treated to a higher strength than the steel of the tube body.

The large-diameter section of the tool joints provides a low stress area where pipe tongs are used to grip the pipe. Hence, relatively small cuts caused by the pipe tongs do not significantly impair the strength or life of the joint of drillpipe.

• Tool jointdesignation

  Size and style

  Nom.Wt. Ib/ft

  Grade

  OutsideDia. of Pin and Box D

  Inside Dia.ofPin d

  Bevel Dia.Of Pin andBoxshoulder DF

  Totallength Tool JointPin LP

  Pin TongSpace L PB

  Box TongSpace L B

  CombinedLength ofpinAnd Box L

  Dia. OfBoxat ElevatorUpset D PE

  Dia. ofBoxat ElevatorUpset D TE

  NC26 2 3/8IF

  23/8EU

  6.65

  E

  3 3/8

  1 3/4

  3 17/64

  10.00

  7

  8

  15

  2 9/16

  2 9/16

  X

  3 3/8

  1 3/4

  3 17/64

  10.00

  7

  8

  15

  2 9/16

  2 9/16

  G

  3 3/8

  1 3/4

  3 17/64

  10.00

  7

  8

  15

  2 9/16

  2 9/16

  NC31 2 7/8IF

  2 7/8EU

  10.40

  E

  4 1/8

  2 1/8

  3 61/64

  10 1/2

  7

  9

  16

  3 3/16

  3 3/16

  X

  4 1/8

  2

  3 61/64

  10 1/2

  7

  9

  16

  3 3/16

  3 3/16

  G

  4 1/8

  2

  3 61/64

  10 1/2

  7

  9

  16

  3 3/16

  3 3/16

  S

  4 1/8

  1 5/8

  3 61/64

  10 1/2

  7

  10 1/2

  16

  3 3/16

  3 3/16

  NC38

  3 1/2EU

  9.5

  E

  4 3/4

  2 11/16

  4 37/64

  11 1/2

  8

  10 1/2

  18 1/2

  3 7/8

  3 7/8

  NC38 3 1/2IF

  3 1/2EU

  13.3

  E

  4 3/4

  2 11/16

  4 37/64

  12

  8

  10 1/2

  18 1/2

  3 7/8

  3 7/8

  X

  5

  2 9/16

  4 37/64

  12

  8

  10 1/2

  18 1/2

  3 7/8

  3 7/8

  G

  5

  2 7/16

  4 37/64

  12

  8

  10 1/2

  18 1/2

  3 7/83

  3 7/8

  S

  5

  2 1/8

  4 37/64

  12

  8

  10 1/2

  18 1/2

  7/8

  3 7/8

  15.5

  E

  5

  2 9/16

  4 37/64

  12

  8

  10 1/2

  18 1/2

  3 7/8

  3 7/8

  S

  5

  2 7/16

  4 37/64

  12

  8

  10 1/2

  18 1/2

  3 7/8

  3 7/8

  G

  5

  2 1/8

  4 37/64

  12

  8

  10

  18 1/2

  3 7/8

  3 7/8

  NC40 4FH

  3 1/2EU

  15.5

  S

  5 1/2

  2 1/4

  5 1/64

  11 1/2

  7

  10

  17

  3 7/8

  3 7/8

  4IU

  14.0

  E

  5 1/4

  2 13/16

  5 1/64

  11 1/2

  7

  10

  17

  4 3/16

  4 3/16

  X

  5 1/4

  2 11/16

  5 1/64

  11 1/2

  7

  10

  17

  4 3/16

  4 3/16

  G

  5 1/2

  2 7/16

  5 1/64

  11 1/2

  7

  10

  17

  4 3/16

  4 3/16

  S

  5 1/2

  2

  5 1/64

  11 1/2

  7

  10

  17

  4 3/16

  4 3/16

  NC46 4IF

  4EU

  14.00

  E

  6

  3 1/4

  5 23/32

  11 1/2

  7

  10

  17

  4 1/2

  4 1/2

  X

  6

  3 1/4

  5 23/32

  11 1/2

  7

  10

  17

  4 1/2

  4 1/2

  G

  6

  3 1/4

  5 23/32

  11 1/2

  7

  10

  17

  4 1/2

  4 1/2

  S

  6

  3

  5 23/32

  11 1/2

  7

  10

  17

  4 1/2

  4 1/2

  4 1/2IU

  13.75

  E

  6

  3 3/8

  5 23/32

  11 1/2

  7

  10

  17

  4 11/16

  4 11/16

  16.6

  E

  6 1/4

  3 1/4

  5 23/32

  11 1/2

  7

  10

  17

  4 11/16

  4 11/16

  X

  6 1/4

  3

  5 23/32

  11 1/2

  7

  10

  17

  4 11/16

  4 11/16

  G

  6 1/4

  3

  5 23/32

  11 1/2

  7

  10

  17

  4 11/16

  4 11/16

  S

  6 1/4

  2 3/4

  5 23/32

  11 1/2

  7

  10

  17

  4 11/16

  4 11/16

  4 1/2EU

  20.00

  E

  6 1/4

  3

  5 23/32

  11 1/2

  7

  10

  17

  4 11/16

  4 11/16

  X

  6 1/4

  2 3/4

  5 23/32

  11 1/2

  7

  10

  17

  4 11/16

  4 11/16

  G

  6 1/4

  2 1/2

  5 23/32

  11 1/2

  7

  10

  17

  4 11/16

  4 11/16

  S

  6 1/4

  2 1/4

  5 23/32

  11 1/2

  7

  10

  17

  4 11/16

  4 11/16

  Tool joint designation	Size and style	Nom Wt. Ib/ft	Grade	Outside Dia of Pin and Box	Inside Dia of Pin	Bevel Dia of Pin and Box shoulder DF	Total lengthTool Joint Pin LP	Pin Tong Space LPB	Box Tong Space	Combined Length of pin And Box L	Dia. Of Box at Eleevator Upset Dpe	Dia. of Box at Elevator UpsetDPE
  NC50 4 1/2IF	4 1/2EU	13.75 16.60	E	6 5/8	3 3/4	6 1/16	11 1/2	7	10	17	5	5
  			E	6 5/8	3 3/4	6 1/16	11 1/2	7	10	17	5	5
  			X	6 5/8	3 3/4	6 1/16	11 1/2	7	10	17	5	5
  			G	6 5/8	3 3/4	6 1/16	11 1/2	7	10	17	5	5
  			S	6 5/8	3 1/2	6 1/16	11 1/2	7	10	17	5	5
  		20.00	E	6 5/8	3 5/8	6 1/16	11 1/2	7	10	17	5	5
  			X	6 5/8	3 1/2	6 1/16	11 1/2	7	10	17	5	5
  			G	6 5/8	3 1/2	6 1/16	11 1/2	7	10	17	5	5
  			S	6 5/8	3	6 1/16	11 1/2	7	10	17	5	5
  	5 IEU	19.5	E	6 5/8	3 3/4	6 1/16	11 1/2	7	10	17	5 1/8	5 1/8
  			X	6 5/8	3 1/2	6 1/16	11 1/2	7	10	17	5 1/8	5 1/8
  			G	6 5/8	3 1/4	6 1/16	11 1/2	7	10	17	5 1/8	5 1/8
  			S	6 5/8	2 3/4	6 1/16	11 1/2	7	10	17	5 1/8	5 1/8
  		25.60	E	6 5/8	3 1/2	6 1/16	11 1/2	7	10	17	5 1/8	5 1/8
  			X	6 5/8	3	6 1/16	11 1/2	7	10	17	5 1/8	5 1/8
  			G	6 5/8	2 3/4	6 1/16	11 1/2	7	10	17	5 1/8	5 1/8
  5 1/2FH	5 IEU	19.50	E	7	3 3/4	6 23/32	13	8	10	18	5 1/8	5 1/8
  			X	7	3 3/4	6 23/32	13	8	10	18	5 1/8	5 1/8
  			G	7	3 3/4	6 23/32	13	8	10	18	5 1/8	5 1/8
  			S	7 1/4	3 1/2	6 23/32	13	8	10	18	5 1/8	5 1/8
  		25.60	E	7	3 1/2	6 23/32	13	8	10	18	5 1/8	5 1/8
  			X	7	3 1/2	6 23/32	13	8	10	18	5 1/8	5 1/8
  			G	7 1/4	3 1/2	6 23/32	13	8	10	18	5 1/8	5 1/8
  			S	7 1/4	3 1/4	6 23/32	13	8	10	18	5 1/8	5 1/8
  	5 1/2IEU	21.90	E	7	4	6 23/32	13	8	10	18	5 11/16	5 11/16
  			X	7	3 3/4	6 23/32	13	8	10	18	5 11/16	5 11/16
  			G	7 1/4	3 1/2	6 23/32	13	8	10	18	5 11/16	5 11/16
  			S	7 1/4	3	6 23/32	13	8	10	18	5 11/16	5 11/16
  		24.70	E	7	4	6 23/32	13	8	10	18	5 11/16	5 11/16
  			X	7	3 1/2	6 23/32	13	8	10	18	5 11/16	5 11/16
  			G	7 1/4	3 1/2	6 23/32	13	8	10	18	5 11/16	5 11/16
  			S	7 1/2	3	6 23/32	13	8	10	18	5 11/16	5 11/16
  6 5/8FH	6 5/8IEU	25.20	E	8	5	7 45/64	13	8	10	18	5 11/16	5 11/16
  			X	8	5	7 45/64	13	8	11	19	6 15/16	6 15/16
  			G	8 1/4	4 3/4	7 45/64	13	8	11	19	6 15/16	6 15/16
  			S	8 1/4	4 1/4	7 45/64	13	8	11	19	6 15/16	6 15/16
  		22.70	E	8	5	7 45/64	13	8	11	19	6 15/16	6 15/16
  			X	8 1/4	4 3/4	7 45/64	13	8	11	19	6 15/16	6 15/16
  			G	8 1/4	4 3/4	7 45/64	13	8	11	19	6 15/16	6 15/16
  			S	8 1/2	4 3/4	7 45/64	13	8	11	19	6 15/16	6 15/16