petroleum tubular fitting casing coupling

Our company, was founded in 1999, with the location of the Intersection of 106 National High way and Jintian Road, East 

Industries Areas of Puyang, Henan,China. We have more than14 years of experience of producing, developing and selling oil pipes and their accessories, steel pipe fittings and other downwell tools,like pup joints, tool 

joins,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. We have the ISO 9001Quality Control Certificate, API - 5CT Certificate with the NO. 5CT0837and API - 7 certificate with the NO. 7-0649.

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, Kazakhstan, Indonesia and so on.

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

All our products are produced and processed according to API SPEC5B5CT, with the materials of steel grade including J55,K55,N80,N801, N80Q,L80,P110 and so on. The couplings have two types, namely NU(nonupset) and EU(external upset). Bynumerically controlled lathe and import molding cutter, the processing of thread can be finished in one time,which ensures its commonality and interchangeability. We have complete testing 

abilities, adopting a whole set of single testing apparatus of thread,including tape,pitch,tooth depth,profile 

and so on.Our products have already passed the identification of the Quality Testing and Inspection Centre of Oil Pipe ofCNPC

(China National Petroleum Corperation)

Below are the sizes of the API 5CT Couplings for Casing and Tubings that we offer.

API CASING COUPLINGS - SHORT THREAD (STC)

API Casing Couplings Short Thread	Casing Size OD (inches)	Coupling Size OD (inches)	Length (inches)	Weight per Coupling (lbs)	Palletized Carton Quantity	Palletized Carton Weight
	4-1/2	5.000	6.250	8.05	343	2716
	5	5.563	6.500	10.18	210	2168
	5-1/2	6.050	6.750	11.44	216	2501
	6-5/8	7.390	7.250	19.97	115	2322
	7	7.656	7.250	18.34	120	2231
	7-5/8	8.500	7.500	26.93	80	2322
	8-5/8	9.625	7.750	35.58	60	2132
	9-5/8	10.625	7.750	39.51	50	2006
	10-3/4	11.750	8.000	49.61	45	2079
	11-3/4	12.750	8.000	50.49	35	1767
	13-3/8	14.375	8.000	56.23	25	1436
	16	17.000	9.000	78.98	20	-
	18-5/8	20	9.000	118.94	10	-
	20	21.000	9.000	98.25	10

  API CASING COUPLINGS - LONG THREAD (LTC)

API Casing Couplings Long Thread	Casing Size OD (inches)	Coupling Size OD (inches)	Length (inches)	Weight per Coupling (lbs)	Palletized Carton Quantity	Palletized Carton Weight
	4-1/2	5.000	7.000	9.07	294	2697
	5	5.563	7.750	12.56	210	2573
	5-1/2	6.050	8.000	14.03	180	2555
	6-5/8	7.390	8.750	24.82	100	2315
	7	7.656	9.000	23.67	100	2351
	7-5/8	8.500	9.250	34.23	80	2807
	8-5/8	9.625	10.000	47.48	48	2337
	9-5/8	10.625	10.500	55.77	40	2302
	10-3/4	11.750	* 10.500	* 62.38	45	* 36
	11-3/4	12.750	* 10.500	* 67.59	30	* 24
	13-3/8	14.375	* 10.500	* 76.63	25	* 20
	16	17.000	* 11.000	* 96.55	20	* 16
	18-5/8	20.000	-	-	10	8
	20	21.000	* 11.500	* 126.74	10	8
	* NOT API SPECIFICATIONS.

   API CASING COUPLINGS - BUTTRESS THREAD (BTC)

API Casing Couplings Buttress Thread	Casing Size OD (inches)	Coupling Size OD (inches)	Length (inches)	Weight per Coupling (lbs)	Palletized Carton Quantity	Palletized Carton Weight
	4-1/2	5.000	8.875	10.11	196	2007
	5	5.563	9.125	12.99	144	2840
	5-1/2	6.050	9.250	14.14	144	2061
	6-5/8	7.390	9.625	24.46	92	2295
	7	7.656	10.000	23.22	80	2068
	7-5/8	8.500	10.375	64.84	64	2221
	8-5/8	9.625	10.625	45.94	48	2414
	9-5/8	10.625	10.625	50.99	40	2256
	10-3/4	11.750	10.625	56.68	36	2307
	11-3/4	12.750	10.625	61.74	24	2179
	13-3/8	14.375	10.625	69.95	20	1429
	16	17.000	10.625	87.56	16	-
	18-5/8	20.000	10.625	138.03	8	-
	20	21.000	10.625	110.33	8	-