Coupling
Hot sale sizes: 7″ casing coupling, 9-5/8″ casing coupling, 13-3/8″ casing coupling, 20″ casing coupling
Hot sale threads for casing coupling: BTC, LTC, STC
More information:
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Casing Coupling |
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Pipe O.D. |
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″ |
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Grade |
H-40, J-55, K-55, C-75, L-80, N-80, C-95, P-110, L80-13CR |
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Thread Connection |
BTC, STC, LTC |
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Option |
Electro-zinc plated |
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Phosphorization |
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Hot sale sizes: 2-3/8″ tubing coupling, 2-7/8″ tubing coupling, 3-1/2″ tubing coupling, 4-1/2″ tubing coupling
Hot sale threads for tubing coupling: EUE, NUE, API 5CT
More information:
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Tubing Coupling |
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Pipe O.D. |
1.900″, 2-3/8″, 2-7/8″, 3-1/2″, 4″, 4-1/2″ |
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Grade |
J-55, C-75, L-80, N-80, C-95, P-110 |
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Thread Connection |
EUE, NUE |
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Option |
Electro-zinc plated Phosphorization |
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Standard |
API 5CT, API 5B |
Advanced thermal spraying technology is adopted to melt Ni alloy and other high wear-resisting materials on the blank surface of the collar after high temperature flame spraying, so as to reduce the friction coefficient between the anti-wear collar and the oil pipe to 0.01, which is an effective combination of high hardness and low friction, thus improving the service life of the rod and pipe in oil exploitation.
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Type |
Grade |
O.D(mm) |
Minimum length(mm) |
Hardness |
Weight |
Standard |
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3/4″ |
19-T |
41.05~41.43 |
101.6~103.17 |
56-62HRA |
0.65 |
API 11B |
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7/8″ |
22-T |
45.75~46.13 |
45.75~46.13 |
56-62HRA |
0.8 |
API 11B |
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1″ |
25-T |
55.35~55.73 |
55.35~55.73 |
12-23HRA |
1.15 |
API 11B |