接箍 Coupling：
1、标准接箍 Stabdard Coupling
2、特殊间歇接箍 Special Space Coupling
3、特殊倒角接箍 Special Bevellde Coupling
4、改进型带密封环接箍 API Improved Seal-Ring Coupling(SR13)
5、组合接箍或异径接箍 Combination Coupling or Special Diameter Coupling 短节或连接管 Pup Joint or Connector：
包括所有油套管规格、螺纹或其他组合
All Size,thread or their combination of tubing and casing are supplied. 尺寸偏差 Dimensions and Tolerances：
外径、壁厚、重量允许偏差 Outside Diameter,Wall Thickness and Weight Tolerances:
| 项目Item | 允许偏差Tolerance | 外径
Outside Diameter | 管体Pipe Body | D≤101.60mm±0.79m | | D≤114.30mm± | ＋1.0%D | | -0.5%D | | 接箍 coupling | ±1%D | | 壁厚Wall Thickness | 0,-12.5%t | | 重量 Weight | 单根Single Lengths | ＋6.5% | | -3.5% | | 车载量Carload Lots | 0,-1.75% |
螺纹参数允许偏差 Thread Parameter Tolerances：
品种规格
Type and Size | 锥度
taper
mm/m | 螺距Pitch mm | 齿 高
Height
mm | 螺纹角度
Angle
度
deg. | 螺纹长度a
Length L4
（外螺纹
External
Thread） | 管 端
倒 角
Chamfer on
End of Pipe
度
deg. | 紧密矩a
Standoff | 每英寸
Per Inch | 累 计
Accu-
mulative | 管体螺纹
Pipe
Thread | 接箍螺纹
Coupling
Thread | 圆螺纹油管
Round Thread
Tubing
2 3/8"～4 1/2" | 10 | 牙/英寸
Threads
per inch | +5.208
-2.600 | ±0.76 | ±0.152 | +0.051
-0.102 | 11/2 | 11/2P | +5
-0 | ±11/2P | ±11/2P | | 8 | 牙/英寸
Threads
per inch | +5.208
-2.600 | ±0.76 | ±0.152 | +0.051
-0.102 | 11/2 | 1P | +5
-0 | ±1P | ±1P | | 圆螺纹套管 Round Thread Casing 4"～7" | +5.208
-2.600 | ±0.76 | ±0.152 | +0.051
-0.102 | 11/2 | 1P | +5
-0 | ±1P | ±1P | 偏梯形螺纹套管
Buttress Thread
Casing
4 1/2"～7" | 接箍
Coupling | +4.50
-2.50 | ±0.051 | ±0.102 | ±0.025 | / | - | +5
-0 | +11/2P
-0 | +0
-11/2P | | | 完整螺纹
Perfect thread | +3.50
-1.50 | 不完整螺纹
Lmperfect
thread length | +4.50
-1.50 |
注a:p---螺距
Note：p---Pitch. 接箍料常用规格
Normal size range of coupling stock
| 代号 Labels | 外径 OD（mm） | 壁厚WT（mm） | | 2 3/8 | 72 | 12 | | 2 3/8 EU | 78 | 12 | | 2 7/8 | 89 | 13 | | 2 7/8 EU | 94 | 13 | | 3 1/2 | 108 | 15 | | 3 1/2 EU | 114 | 15.5 | | 4 | 121 | 15.5 | | 4 EU | 127 | 16 | | 4 1/2 | 132 | 15.5 | | 41/2 EU | 141 | 15 | | 5 | 141 | 14.5 | | 5 1/2 | 154 | 14.5 | | 6 5/8 | 188 | 15 | | 7 | 195 | 17 | | 7 5/8 | 216 | 19.5 | | 8 5/8 | 245 | 21.5 | | 9 5/8 | 270 | 21.5 | | 10 3/4 | 299 | 21.5 | | 11 3/4 | 324 | 21.5 | | 13 3/8 | 365 | 25.4 | | 16 | 432 | 22 |
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