Casing Coupling, Tubing Coupling, API 5CT Couplings, OCTG Couplings

Keywords:

OCTG Couplings and Accessories

coupling

the

tubing

stc

btc

ltc

api

couplings

5ct

thread

casing

Category:

OCTG Couplings and Accessories

Casing Coupling, Tubing Coupling, API 5CT Couplings, OCTG Couplings

产品描述

Commodity name: Casing Coupling, Tubing Coupling, API 5CT Couplings, OCTG Couplings

Casing Coupling, Tubing Coupling, API 5CT Couplings, OCTG Couplings

Product Name: Casing Coupling, Tubing Coupling, API 5CT Couplings, OCTG Couplings

Size: Tubing Coupling : 1.9'' - 4-1/2'',Casing Couping : 4-1/2'' - 13-3/8''

Thread Type: NUE/EUE/STC/LTC/BTC

Grade: J55, L80, N80 & P110

Standard: API 5CT and 5B PSL1/PSL2 J55,K55,N80-1,N80-Q, API 5CT and 5B L80-1,C90, C95,T95, P110, Q125

Surface Treatment: phosphating treatment

Tubing Coupling

Normally tubing coupling OD maximum is 4 1/2”, as the tubing pipe is applied for the drilling activities (Inside the tubing is the sucker rod to drill/pump the oil), couplings type is more various and rigorous than casing, mostly used is thicken type upset coupling (Internal upset and external upset), for short is EUE coupling, it is the most favorable in tubing connections. Tubing with EU end (EUE) coupling connection also called UPTBG. Because of the end of the tubing is thickened (upset), the connecting stress is better than buttress coupling.

Buttress coupling another type used for tubing connections, it has the same thickness of the pipe body, called NU end (NUE)tubing or TBG.

Features

The oil tubing coupling can solve the problem of fatigue fracture in the existing coupling due to stress concentration. Oil tubing end is connected to the inside wall of the coupling in a tapered thread. The coupling body end and oil tubing are connected with same thread pitch flat thread. The coupling is not easy to produce fatigue fracture, and has good connection effect. It can prevent the accident of oil well pipe string break effectively.

Casing Coupling

Casing coupling is for the dimensions more than 4 1/2 inch. Differently than tubing coupling is, casing coupling normally does not need to be thickened (Non-upset), which means no upset casing coupling, so it 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.

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.

If you have any Inquiry, please don't hesitate to contact us immediately,Email: xw200609@westwu.cn tel/WA:+86 18217119799

Specification

API Tubing Coupling
Descriptions and size		Type of Thread	O.D*L	Weight
Descriptions and size		Type of Thread	(mm)	(kg)
Tubing Coupling	1.05	NUE	33.35*80.96	0.23
	1.05	EUE	42.16*82.55	0.38
	1.315	NUE	42.16*82.55	0.38
	1.315	EUE	48.26*88.90	0.57
	1.66	NUE	52.17*88.90	0.59
	1.66	EUE	58.88*95.25	0.68
	1.9	NUE	55.88*95.25	0.56
	1.9	EUE	63.50*98.42	0.84
	2-3/8″	NUE	73.02*107.95	1.28
	2-3/8″	EUE	77.80*132.82	1.55
	2-7/8″	NUE	88.90*130.18	2.34
	2-7/8″	EUE	93.17*133.35	2.4
	3-1/2″	NUE	107.95*142.88	3.71
	3-1/2″	EUE	114.30*146.05	4.1
	4″	NUE	120.65*146.05	4.35
	4″	EUE	127.00*152.40	4.82
	4-1/2″	NUE	132.08*155.58	4.89
	4-1/2″	EUE	141.30*158.75	6.05

API Casing Coupling
Descriptions and size		Type of Thread	O.D*L	Weight
Descriptions and size		Type of Thread	(mm)	(kg)
Casing Coupling	4-1/2″	STC	127.00*158.75	5.23
	4-1/2″	LTC	127.00*177.80	4.15
	4-1/2″	BTC	127.00*225.42	4.55
	5″	STC	141.30*165.10	4.66
	5″	LTC	141.30*196.85	5.75
	5″	BTC	141.30*231.78	5.85
	5-1/2″	STC	153.67*171.45	5.23
	5-1/2″	LTC	153.67*203.20	6.42
	5-1/2″	BTC	153.67*234.95	6.36
	6-5/8″	STC	187.71*184.15	9.12
	6-5/8″	LTC	187.71*222.25	11.34
	6-5/8″	BTC	187.71*244.48	11.01
	7″	STC	194.46*184.15	8.39
	7″	LTC	194.46*228.60	10.83
	7″	BTC	194.46*254.00	10.54
	7-5/8″	STC	215.90*190.50	12.3
	7-5/8″	LTC	215.90*234.95	15.63
	7-5/8″	BTC	215.90*263.52	15.82
	8-5/8″	STC	244.48*196.85	16.23
	8-5/8″	LTC	244.48*254.00	21.67
	8-5/8″	BTC	244.48*269.88	20.86
	9-5/8″	STC	269.88*196.85	18.03
	9-5/8″	LTC	269.88*266.70	25.45
	9-5/8″	BTC	269.88*269.88	23.16
	10-3/4″	STC	298.45*203.20	20.78
	10-3/4″	BTC	298.45*269.88	25.74
	11-3/4′	STC	323.85*203.20	22.64
	11-3/4′	BTC	323.85*269.88	28.03
	13-3/8″	STC	365.12*203.20	25.66
	13-3/8″	BTC	365.12*269.88	31.77
	16″	STC	431.80*228.6	34.91
	16″	BTC	431.80*269.88	40.28
	18-5/8″	STC	508.00*228.60	51.01
	18-5/8″	BTC	508.00*269.88	62.68
	20″	STC	533.40*228.6	43.42
	20″	LTC	533.4*292.10	57.04
	20″	BTC	533.40*269.88	50.1

Standard

Applicable Standards of OCTG Couplings
API 5CT material for body;
API 5B for API threads;
Premium thread per licensor specifications

Main Technical Parameters of Coupling

Couplings	Size in	Max. OD in(mm)		Min length in(mm)		Grade
	Size in	NU	EU	NU	EU	Grade
	23/8	2.875(73.03)	3.063(77.80)	41/4(107.95)	47/8(123.83)	J55 N80 L80
	27/8	3.500(88.90)	3.668(93.20)	51/8(130.18)	51/4(133.35)
	31/2	4.250(108.00)	4.500(114.30)	55/8(142.88)	53/4(146.05)
Crossovers	All kinds of crossovers, connections and sub-couplings of grades J55, N80 and L80