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Heavy Weight Drill Pipe

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  • Heavy Weight Drill Pipe is a type of drillpipe whose walls are thicker and collars are longer than conventional drillpipe.
  • HDWP is a type of drillpipe whose walls are thicker and collars are longer than conventional drillpipe.
  • Heavy Weight Drill Pipe is a type of drillpipe whose walls are thicker and collars are longer than conventional drillpipe.
  • Heavy Weight Drill Pipe is a type of drillpipe whose walls are thicker and collars are longer than conventional drillpipe.

Short Description:


  • Product: Heavy Weight Drill Pipe, HWDP, Welded Heavyweight Drill Pipe
  • Standard: API 5DP, API SPEC 7-1
  • Grade: API 5DP Grade DZ50, E75, R780, X95, G105, S135
  • Sizes: 2 3/8”, 2 7/8”, 3 1/2” 4”, 4 1/2”, 5”, 5 1/2” up to 6 5/8” OD Range in mm: 60.3mm, 73mm, 88.9mm, 101.6mm, 114.3mm, 127mm, 139.7mm Range of Thickness: 6.5mm to 12.7mm, or cutomized
  • Connection threads: NC26, NC31, NC38, NC40, NC46, NC50, 5 1/2FH.6 5/8FH.
  • Internal Upset: IU, EU, IEU
  • Length: R1, R2, R3
  • Connection: API Regular, PAC, H90
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    Description

    Specification

    Materials

    Standards

    Process

    Packings

    Integral heavy weight drill pipe is the transition zone between drill collar and drill pipe. It can not only reduce stress-formation in the connection of drill collar and drill pipe, but also reduce the wear on OD.

    Integral heavy weight drill pipe is made from one piece of AISI 4145H solid bar, fully heat treated, all physical properties conform to API spec7 latest edition.

    HWDP’s wear resistance hard banding is standard on tool joints connections and central upset. The types of hard banding include Arnco 100XT and100XT. All threads are phosphated, copperized or cold worked. All connections are equipped with pressed steel thread protectors. All theads are machined with CNC lathes –Double-shoudered and special threads.

    Heavy weight drill pipe

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    • Technical specifications and parameters

    Size(in)

    O.D. (in)

    I.D. (in)

    Tool Joint O.D. (in)

    Tool Joint I.D. (in)

    Connection

    Max.elevator diameter (in)

    Central upset dia. (in)

    Min.drift dia.size(in)

    3 1/2

    3 1/2

    2 1/4

    4 3/4
    (4 7/8, 5)

    2 1/4

    NC38

    3 7/8

    4

    2

    2 1/16

    2 1/16

    1 13/16

    4

    4

    2 1/2

    5 1/4

    2 1/2

    NC40

    4 3/16

    4 1/2

    2 1/4

    2 9/16

    2 9/16

    2 5/16

    4 1/2

    4 1/2

    2 11/16

    6 1/4

    2 11/16

    NC46

    4 11/16

    5

    2 7/16

    2 3/4

    2 3/4

    2 1/2

    2 13/16

    2 13/16

    2 9/16

    5

    5

    3

    6 5/8

    3

    NC50

    5 1/8

    5 1/2

    2 3/4

    5 1/2

    5 1/2

    3 1/4

    7
    (7 1/4, 7 1/2)

    3 1/4

    5 1/2 FH

    5 11/16

    6

    3

    3 3/8

    3 3/8

    3 1/8

    3 7/8

    3 7/8

    3 5/8

    4

    4

    3 3/4

    6 5/8

    6 5/8

    4

    8
    (8 1/4, 8 1/2)

    4

    6 5/8 FH

    6 15/16

    7 1/8

    3 3/4

    4 1/2

    4 1/2

    4 1/4

    5

    5

    4 3/4

     

    Spiral heavy weight drill pipe
    Specification  mm

    Tube

    Joint
    ID mm Elevator upsetmm elevator groove
    /Slip outside diametermm    		 Screw in diametermm Spiral groove depthmm Thread Type OD mm ID mm
    88.9(3 1/2) 54 92.1 88.9 101.6 9.5 NC38 120.6 54
    114.3(4 1/2) 69.8 117.5 114.3 127 12.7 NC46 158.8 69.8
    127.0(5) 76.2 130.2 127 139.7 12.7 NC50 165.1 76.2
    Steel Mark

    Chemical Composition%
    C Si Mn P S Cr Mo Cu Al
    4145H 0.42～0.48 0.15～0.35 0.90～1.20 ≤0.03 ≤0.03 0.90～1.20 0.15～0.25 ≤0.2 0.025～0.045
    Other Elements：N≤0.015，Ni≤0.5

    Application

    Material

    Size

    Yield Strength (Min KSI)

    Ultimate Strength (Min KSI)

    Hardness Brinell (HB)

    Elongation (A%)

    Min CHarpy (ft-lbs @+20°C)

    Integral Standard
    & NS-1

    AISI 4145H Modified

    All

    110

    140

    285 to 340

    13

    40

    Welded Standard
    (central part)

    AISI 1340 Modified

    All

    65

    95

    235 (max)

    18

    30

    Welded NS-1
    (central part)

    AISI 4140H Modified

    All

    120

    140

    285 to 340

    13

    40

    Welded Standard
    & NS-1 (tool joint)

    AISI 4140H Modified

    Above 7 1/4”

    120

    140

    285 to 340

    13

    40

    Standard welded
    & NS-1 (tool joint)

    AISI 4140H Modified

    Up to 7 1/4”

    100

    135

    285 to 340

    13

    40

    HWDP-110 HW MS

    ASCOWELL C

    Above 6 3/4”

    110

    140

    285 to 340

    13

    0

    HWDP-110 HW MS

    ASCOWELL C

    Up to 6 3/4”

    100

    135

    285 to 340

    13

    55

    HWDP-65 HW MS (tool joint)

    ASCOWELL C

    Above 6 3/4”

    110

    140

    285 to 340

    13

    55

    HWDP-65 HW MS (tool joint)

    ASCOWELL C

    Up to 6 3/4”

    100

    135

    285 to 340

    13

    55

    HWDP-65 HW MS
    (central part)

    AISI 1340 Modified

    All

    65

    95

    235 (max)

    18

    30

    standards

    process

    packing