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    Tubing and Casing Coupling

    Product:

     Casing and Tubing Coupling, Casing Coupling, Tubing Coupling

    Application: 

     Used for connect 2 joints of tubing or casing

    Size:

    Tubing Coupling : 1.9'' -  4-1/2''


    Casing  Couping :  4-1/2'' - 13-3/8''

    Pipe Standard: 

     API 5CT and 5B PSL1/PSL2  J55,K55,N80-1,N80-Q,


     API 5CT and 5B L80-1,C90, C95,T95, P110, Q125

    Surface:

    Whole Phosphating or inside phosphating and outside coating

    Thread:

     NUE, EUE, VAM, STC, LTC, BTC, XC, VAM TOP, NEW VAM,HYDRILL CS

    Special Service

     Sweet Service, Sour Service, Anti-H2S, NACE MR0175/ISO15156


    Casing and tubing couplings are short lengths of pipes applied to connect two joints of casing and tubing. They are painted different color codes on their external surface to indicate their grades. Casing coupling and tubing coupling are manufactured according to API 5CT and 5B specifications.

    API Casing Coupling:

    Specification


    Size (Pipe OD) (in)

    4-1/2, 5, 5-1/2, 6-5/8, 7, 7-5/8, 8-5/8, 9-5/8, 10-3/4, 11-3/4, 13-3/8, 16, 18-5/8, 20

    Threading

    Short Round-Thread Casing (STC)

    Long Round-Thread Casing (LC)

    Buttress Thread Casing (BC)

    Grade

    H-40, J-55, K-55, C-75, L-80, N-80, C-95, AS-95, P-110, L80-13CR

    API Tubing Coupling:

    Specification


    Size (Pipe OD) (in)

    1.900, 2-3/8, 2-7/8, 3-1/2, 4, 4-1/2

    Upset

    Non Upset

    External Upset

    Grade

    J-55, C-75, L-80, N-80, C-95, P-110

    Option

    Electro-zinc plated

    Phosphorised

    Application

     

    The steel coupling is mainly used to connect oil pipes in pil drilling.

    This product can be used to connect the shafts of units that are

    manufactured separately.

    It can fit the misalignment of the shafts or introduce mechanical flexibility.

    The pipe coupling is capable of reducing the transmission of shock losds from one shaft to another.

    It can also introduce protecyion against overloads.

    The steel coupling can be used to alter vibration characteristics of

    rotating units.

    Pipe coupling is also used to connect drilling par and driven part.


    Casing Couplings Short Thread Specifications:

    Casing Couplings
    Short Thread

    Casing Size OD (inches)

    Coupling Size OD (inches)

    Length (inches)

    Weight per Coupling (lbs)

    Palletized Carton Quantity

    Palletized Carton Weight

    图片1.png 

    4-1/2

    5.000

    6.250

    8.05

    343

    2716

    5

    5.563

    6.500

    10.18

    210

    2168

    5-1/2

    6.050

    6.750

    11.44

    216

    2501

    6-5/8

    7.390

    7.250

    19.97

    115

    2322

    7

    7.656

    7.250

    18.34

    120

    2231

    7-5/8

    8.500

    7.500

    26.93

    80

    2322

    8-5/8

    9.625

    7.750

    35.58

    60

    2132

    9-5/8

    10.625

    7.750

    39.51

    50

    2006

    10-3/4

    11.750

    8.000

    49.61

    45

    2079

    11-3/4

    12.750

    8.000

    50.49

    35

    1767

    13-3/8

    14.375

    8.000

    56.23

    25

    1436

    16

    17.000

    9.000

    78.98

    20

     -

    18-5/8

    20

    9.000

    118.94

    10 

     -

    20

    21.000

    9.000

    98.25

    10 

     -


    Casing Couplings Long Thread Specifications:

     Casing Couplings
    Long Thread

    Casing Size OD (inches)

    Coupling Size OD (inches)

    Length (inches)

    Weight per Coupling (lbs)

    Palletized Carton Quantity

    Palletized Carton Weight

    图片2.png 

    4-1/2

    5.000

    7.000

    9.07

    294

    2697

    5

    5.563

    7.750

    12.56

    210

    2573

    5-1/2

    6.050

    8.000

    14.03

    180

    2555

    6-5/8

    7.390

    8.750

    24.82

    100

    2315

    7

    7.656

    9.000

    23.67

    100

    2351

    7-5/8

    8.500

    9.250

    34.23

    80

    2807

    8-5/8

    9.625

    10.000

    47.48

    48

    2337

    9-5/8

    10.625

    10.500

    55.77

    40

    2302

    10-3/4

    11.750

    * 10.500

    * 62.38

    45

    * 36

    11-3/4

    12.750

    * 10.500

    * 67.59

    30

    * 24

    13-3/8

    14.375

    * 10.500

    * 76.63

    25

    * 20

    16

    17.000

    * 11.000

    * 96.55

    20

    * 16

    18-5/8

    20.000

    -

    -

    10

    8

    20

    21.000

    * 11.500

    * 126.74

    10

    8

    * NOT API SPECIFICATIONS.

     

    Casing Coupling - Buttress Thread

    Casing Couplings
    Buttress Thread

    Casing Size OD (inches)

    Coupling Size OD(inches)

    Length (inches)

    Weight per Coupling (lbs)

    Palletized Carton Quantity

    Palletized Carton Weight

    图片3.png 

    4-1/2

    5.000

    8.875

    10.11

    196

    2007

    5

    5.563

    9.125

    12.99

    144

    2840

    5-1/2

    6.050

    9.250

    14.14

    144

    2061

    6-5/8

    7.390

    9.625

    24.46

    92

    2295

    7

    7.656

    10.000

    23.22

    80

    2068

    7-5/8

    8.500

    10.375

    64.84

    64

    2221

    8-5/8

    9.625

    10.625

    45.94

    48

    2414

    9-5/8

    10.625

    10.625

    50.99

    40

    2256

    10-3/4

    11.750

    10.625

    56.68

    36

    2307

    11-3/4

    12.750

    10.625

    61.74

    24

    2179

    13-3/8

    14.375

    10.625

    69.95

    20

    1429

    16

    17.000

    10.625

    87.56

    16

    -

    18-5/8

    20.000

    10.625

    138.03

    8

    -

    20

    21.000

    10.625

    110.33

    8

    -


    Tubing Couplings - External Upset End (EUE):

     EUE
    Tubing Couplings

    Casing Size OD (inches)

    Coupling Size OD (inches)

    Threads per inch

    Length (inches)

    Weight per Coupling (lbs)

    Palletized Carton Quantity

    Palletized Carton Weight

    图片4.png 

    1.90

    2.500

    10 Round

    -

    1.85

    -

    -

    2-3/8

    3.063

    8 Round

    4.875

    3.42

    1,444

    3942

    2-7/8

    3.668

    8 Round

    5.500

    5.29

    792

    4220

    3-1/2

    4.500

    8 Round

    5.750

    9.02

    448

    3860

    4

    5.000

    8 Round

    -

    10.62

    392

    -

    4-1/2

    5.563

    8 Round

    6.500

    13.31

    252

    3456


    Tubing Couplings - Non Upset End (NUE)

     Non-Upset
    Tubing Couplings

    Casing Size OD (inches)

    Coupling Size OD (inches)

    Threads per inch

    Length (inches)

    Weight per Coupling (lbs)

    Palletized Carton Quantity

    Palletized Carton Weight

    图片5.png 

    1.90

    2.200

    10 Round

    3.750

    1.85

    -

    -

    2-3/8

    2.875

    10 Round

    4.500

    2.82

    1,512

    4264

    2-7/8

    3.500

    10 Round

    5.500

    5.15

    800

    4120

    3-1/2

    4.250

    10 Round

    5.625

    8.17

    502

    4101

    4

    4.75

    8 Round

    5.75

    9.57

    392

    -

    4-1/2

    5.200

    8 Round

    6.500

    10.76

    252

    2712


    Coupling Pipe Grade Identification By Paint Color

    Grade

    Colour Coding (Painted Outside)

    H-40

    Black

    J-55 or K-55

    Green

    N-80

    Red

    M-65 or L-80

    Red with one Brown Band

    L-80 Type 9CR

    Red with two Yellow Bands

    L-80 Type 13CR

    Red with one Yellow Band

    C-90 Type 1

    Purple

    C-90 Type 2

    Purple with one Yellow Band

    T-95 Type 1

    Silver

    T-95 Type 2

    Silver with one Yellow Band

    C-95

    Brown

    P-110

    White

    Q-125 Type 1

    Orange

    Q-125 Type 2

    Orange with one Yellow Band

    Q-125 Type 3

    Orange with one Green Band

    Q-125 Type 4

    Orange with one Brown Band

     


    API 5B, Specification for Threading, Gauging and Thread Inspection of Casing, Tubing, and Line Pipe Threads.This Specification covers dimensions, tolerances and marking requirements for API threads and the gauges that control the acceptance criteria for the threads. Thread element gauges, instruments and requirements for the inspection of threads for line pipe, round thread casing, and buttress casing connections are included.  

    API Spec 5CT, Specification for Casing and Tubing, Eighth Edition, Petroleum and natural gas industries-Steel pipes for use as casing or tubing for wells.This Standard specifies the technical delivery conditions for steel pipes (casing, tubing and pup joints), coupling stock, coupling material and accessory material and establishes requirements for three Product Specification Levels (PSL-1, PSL-2, PSL-3).


    coupling.jpg


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