OTCG Casing Coupling

Standards: API 5CT Casing Couplings
Processing: Seamless
Size: 4 1/2- 10 3/4”
Grade: J55, K55, L80, N80, P110
Thread Type: STC, LTC, BTC
Test: NDT etc related rules of API 5CT and 5B
Surface Treatment: Whole phosphating, or inside phosphating and outside coating

API Casing Coupling Overview

OTCG (Oil Country Tubular Goods) is a family of rolled metal products for oil and gas drilling. These include drill pipe, casing and tubing, line pipe, couplings and connections. Our OTCG Casing coupling is designed to make your operations as efficient and effective as possible. Casing coupling is one of the most important parts of the drilling process, as it helps connect two casings and ensures that the well doesn’t collapse during operations. With this tool, you can improve production rates, reduce downtime, and even save on installation costs. Created with connect a joint tightness between the upper and lower casing, this device keeps fluids from leaking out – preventing unnecessary damage during operation. Plus, its reliability ensures consistent pressure and flow throughout your pipeline system.

API Casing coupling has three thread types: LTC:(Long buttress coupling), STC(Short buttress coupling), and BTC(Buttress coupling), which have the same thickness as the casing pipe body, but just have different lengths. Wiho metals is a quality wholesale manufacturer and supplier of OCTG Casing Couplings in China that can offer you a wide variety of API prime OCTG Tubing and Casing Couplings. We have a large supply of in-stock inventory manufactured according to API standards and used for oil production activities onshore and offshore. As a good OCTG manufacturer, we will be able to offer you a wide variety of coupling sizes and grades, and excellent service at reasonable prices.

Size, inch

Grades

Threads

4 1/2

5 1/2

8 5/8

9 5/8

10 3/4

11 3/4”

J55

K55

L80 1

L80 9Cr

P110

STC(Short thread coupling)

LTC(Long thread coupling )

BTC(Buttress thread coupling)

API Casing Couplings Dimension(LTC)

Casing Size OD(inches)	Coupling Size OD(inches)	Length (inches)	Weight Per Coupling(lbs)
4 1/2	5.000	7.000	9.07
5	5.563	7.750	12.56
5 1/2	6.050	8.000	14.03
6 5/8	7.390	8.750	24.82
7	7.656	9.000	23.67
7 5/8	8.500	9.250	34.23
8 5/8	9.625	10.000	47.48
9 5/8	10.625	10.500	55.77
10 3/4	11.750	*10.500	*62.38
11 3/4	12.750	*10.500	*67.59
13 3/8	14.375	*10.500	*76.63
16	17.000	*11.000	*96.55

API Casing Couplings Dimension (STC)

Casing Size OD (inches)	Coupling Size OD (inches)	Length (inches)	Weight per Coupling (lbs）
4-1/2	5.000	6.250	8.05
5	5.563	6.500	10.18
5-1/2	6.050	6.750	11.44
6-5/8	7.390	7.250	19.97
7	7.656	7.250	18.34
7-5/8	8.500	7.500	26.93
8-5/8	9.625	7.750	35.58
9-5/8	10.625	7.750	39.51
10-3/4	11.750	8.000	49.61
11-3/4	12.750	8.000	50.49
13-3/8	14.375	8.000	56.23
16	17.000	9.000	78.98
18-5/8	20	9.000	118.94
20	21.000	9.000	98.25

API Casing Couplings Dimension (BTC)

Casing Size OD (inches)	Coupling Size OD (inches)	Length (inches)	Weight per Coupling (lbs)
4-1/2	5.000	8.875	10.11
5	5.563	9.125	12.99
5-1/2	6.050	9.250	14.14
6-5/8	7.390	9.625	24.46
7	7.656	10.000	23.22
7-5/8	8.500	10.375	64.84
8-5/8	9.625	10.625	45.94
9-5/8	10.625	10.625	50.99
10-3/4	11.750	10.625	56.68
11-3/4	12.750	10.625	61.74
13-3/8	14.375	10.625	69.95
16	17.000	10.625	87.56
18-5/8	20.000	10.625	138.03
20	21.000	10.625	110.33