Product Details

Company Information

Henan Dongfanglong Machine Manufacture Co.,LTD was founded in 1999 and located at intersection of 106 National Highway and JIntian road,Puyang,Henan,Chian.We have over 15 years experience of producing,

developing and selling oil pipes and their accessories,steel pipe fittings and other down well tools.We can supply the related certifications for you as follow:

ISO 9001 Quality control certificate
API-5CT Certificate with the NO.5CT-0837
API-7 Certificate with the No.7-0872
API -5DP Certificate with the No.5DP-0135

The company has a fixed assets of over 570 million RMB,and is staffed with over 200 employees,almost hundred sets of accurate CNC lathes,auxiliary equipments and developed other machines and testing

equipments.Our own trademark has been registered and approved since february 2010.

Main products

The main products of our factory is as follow: Tubing and casing couplings size from 1.9" to 20" with various

material and types,pup joints, all kinds of tool joints, and other down well tools that designed and developed

by our own such as:High efficient cyclone separator,tubing centralizer, Spiralflow sand setting device and so on.Now our production capability has reached 3000000 piece per year.

Main market

We are the regular suppliers of Petrochina and Sinopec. From 2009,our market have expanded abroad out of China.Our products have already been used in USA,Brazil, Venezuela,India,Kazakhatan,Indonesia and so on.

We will hope to cooperate with you by our high quality products and excellent service.

Product Description

Tubing coupling

1.Size:1.9" 2 3/8" 2 7/8" 3 1/2" 4 1/2"

2.Thread type:Non-upset(NU), external upset(EUE);

3.Grade type:J55 K55 N80-1 N80-Q L80 P110;

4.Standard: API 5CT 5B;

API external-upset tubing coupling Dimensions and masses

Tubing OD (in)	Coupling OD (in)	Length (in)	Weight per coupling/Kg	Package Quantity (piece)	Package Weight/Kg	Teeth number per25.4mm of thread (piece)
1.9	2.188	3.750	0.84	2800	2352	8
2 3/8	3.036	4.875	1.55	1444	2239	8
2 7/8	3.668	5.500	2.40	792	1901	8
3 1/2	4.500	5.750	4.10	448	1837	8
4	4.750	5.750	4.82	320	1543	8
4 1/2	5.563	6.500	6.05	252	1552	8

API non-upset tubing coupling Dimensions and masses

Tubing OD(in)	Coupling OD (in-mm)	Length (in-mm)	Weight per coupling/Kg	Package Quantity (piece)	Package Weight/Kg	Teeth number per25.4mm of thread (piece)
1.9	2.188-55.575	3.750-95.250	0.56	2900	1624	10
2 3/8	2.875-73.025	4.500-114.300	1.28	1512	1936	10
2 7/8	3.500-88.900	5.500-139.700	2.34	800	1872	10
3 1/2	4.250-107.950	5.625-142.875	3.71	502	1863	10
4	4.726-120.040	5.750-146.050	4.35	382	1662	10
4 1/2	5.200-132.080	6.500-165.100	4.89	252	1233	10