China API 5CT 5 1 2quot N80 Btc Premium Thread Casing Coupling

Product Description

Casing coupling is a kind of oil field drilling tool, which is mainly used for tubing connection.The coupling mainly solves the problem of fatigue fracture caused by stress concentration.

The coupling is divided into tubing coupling and casing coupling.

Technical Parameter

Specifications

Tubing Coupling

Tubing coupling specifications

OD mm

Min length mm

Weight kg

NU

EN

NU

EN

NU

EN

1.9

55.88

63.5

93.25

98.42

0.56

0.84

2 3/8

73.02

77.8

107.95

123.82

1.28

1.55

2 7/8

88.9

93.17

130.18

133.35

2.34

2.4

3 1/2

107.95

114.3

142.88

146.05

3.71

4.1

4

120.65

127

146.05

152.4

4.35

4.82

4 1/2

132.08

141.3

155.58

158.75

4.89

6.05

Casing Coupling

Casing coupling specifications

OD mm

Min length mm

Weight kg

short-thread

long-thread

short-thread

long-thread

4 1/2

127

158.75

177.8

3.62

4.15

5

141.3

165.1

196.85

4.66

5.75

5 1/2

153.67

171.45

203.2

5.23

6.42

Performance of Internal Epoxy Coating

Inspection ItemStandardInspection Method1AppearanceSmooth, Uniform color, no bubble, no cracking or contraction cavity, little range peel allowedVisual2Thermal Performance |ΔT g|(ºC )≤ 5Appendix B3cathodic disbanding resistance≤ 6.5Appendix C24h or 48h (mm)4Bonding surface porosity1~4Appendix D5The section void ratio1~3Appendix D6resistance to deflection 3°No crackingAppendix E7Impact Energy (8J)No pin holeAppendix F8Adhesive forcedissection method1~2Appendix Gpull off adhesion (MPa)≥ 20GB/T 52109Electric strength (MV/m)≥ 30GB/T 1408.110Volume resistivity(Ω·m )≥ 1x1013GB/T 141011Salt fog resistance (1000h)No change of anti-corrosion coatingGB/T 1771

All of casing couplings are with materials of steel grade including J55, K55, N80, N80-1,N80-Q,L80,P110 and so on . The casing couplings have two types, namely NU and EU. By numerically controlled lathe and import molding cutter, the processing of thread can be finished in one time,which ensures its commonality and interchangeability. We have complete testing abilities, adopting a whole set of single testing apparatus of thread, including tape,pitch,tooth depth and profile.

We carry size range ofin grade. All of our couplings meet the API Specifications 5CT/5B.

1.Material:J55, K55, N80-1, N80-Q, L80, C90, P110

2.Size: tubing coupling from 2-3/8" to 4-1/2"

3.Surface treatment: Whole phosphating, or inside phosphating and outside coating

4.Packing: By carton, wooden case, wooden pallet, or by requirements of customers