Shengji manufacture the tubing and casing coupling with more than 20-year production enperience, we can make EUE and NUE for casing tubing coupling, strictly comply with API 5CT/5B standard, the annual production capacity is 1,000,000 pcs.

The EXPE coating Tubing and Casing Coupling has good corrosion resistance and is used in combination with the HDPE liner tubing. It is widely used in high corrosion Wells.Shengji liner tubing are repair-free thereby extending performance 4.7 times. This reduces maintenance costs. All HDPE/EXPE liner tubing must pass strict quality inspection to guarantee 100% customer satisfaction. Shengji uses an advanced defect detection machine.

1. Couplingmaterialcoverthewholestandardrange.2. Highdimensionprecision.3. Goodpeformancein Anti-Corrosion.

TubingCoupling

Tubing coupling specifications

OD mm

Min lengthmm

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

CasingCoupling

Casing coupling specifications

OD mm

Min lengthmm

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 Item Standard Inspection Method 1 Appearance Smooth, Uniform color, no bubble, no cracking or contraction cavity, little range peel allowed Visual 2 Thermal Performance |ΔT g|(℃ ) ≤ 5 Appendix B 3 cathodic disbanding resistance ≤ 6.5 Appendix C 24h or 48h (mm) 4 Bonding surface porosity 1~4 Appendix D 5 The section void ratio 1~3 Appendix D 6 resistance to deflection 3° No cracking Appendix E 7 Impact Energy (8J) No pin hole Appendix F 8 Adhesive force dissection method 1~2 Appendix G pull off adhesion (MPa) ≥ 20 GB/T 5210 9 Electric strength (MV/m) ≥ 30 GB/T 1408.1 10 Volume resistivity(Ω·m ) ≥ 1×1013 GB/T 1410 11 Salt fog resistance (1000h) No change of anti-corrosion coating GB/T 1771

1.Magnetic Flux Leakage Testing

2.Ultrasonic Flaw Detection atthe End of The Pipe

3.Magnetic Particle Inspection

4.X-ray Radiographic Inspection

5.Hydrostatic Test

In 1964, our factory is established;

In 1995, we bought in the first tubing production line;

In 2007, our company is restuctured;

In 2015, we became the supplier for Schlumberger and Haliburton.

API 5CT 2 38 N80 EUE NUE Casing Tubing Coupling SeamlessAPI 5CT 2 38 N80 EUE NUE Casing Tubing Coupling SeamlessAPI 5CT 2 38 N80 EUE NUE Casing Tubing Coupling SeamlessAPI 5CT 2 38 N80 EUE NUE Casing Tubing Coupling SeamlessAPI 5CT 2 38 N80 EUE NUE Casing Tubing Coupling SeamlessAPI 5CT 2 38 N80 EUE NUE Casing Tubing Coupling SeamlessAPI 5CT 2 38 N80 EUE NUE Casing Tubing Coupling Seamless