API 5CT OCTG Casing Coupling

• After-sales Service: Video Guidance
• Warranty: 1 Years
• Manufacturing Process: Forging
• Surface Treatment: Spray-Paint
• Operation Pressure: Atmospheric Pressure
• Material: Alloy
• Model NO.: 4 1/2"-20"
• Transport Package: Wooden Package
• Specification: 4 1/2"-20"
• Trademark: Puyang Zhongshi
• Origin: China

Product Description

Product Description:

The oil casing coupling is a necessary piece used to connect the two casing. The coupling manufacturing method is the same as seamless pipe. The steel pipe ends with internal thread to connect with the upper and lower casing. In order to ensure the joint tightness, the precision of screw thread is strictly required.Casing coupling is for the dimensions more than 4 1/2 inch, which has following types:
BTC: Buttress coupling 
LTC: Long buttress coupling
STC: Short buttress coupling
All three types has same thickness of the casing pipe body, just have different lengths.

Specifications:
 

Size(inch)	Out Diameter (mm)	Minimum Length (mm)		Weight(kg)
		short-thread	long-thread	short-thread	long-thread
4 1/2	133.35	158.75	177.8	5.24	5.96
5	147.32	165.1	196.85	6.43	7.86
5 1/2	160.02	171.45	203.2	7.34	8.92
6 5/8	168.28	184.15	222.25	9.12	11.34
7	177.8	184.15	228.6	10.88	13.92
7 5/8	193.7	190.5	234.95	12.16	15.63
8 5/8	219.08	196.85	254	15.62	21.67

Finished Products: