Name: API 7-1 Drill Collar
Brand: Shengtian Group
Availability: InStock
Rating: 5 (1 reviews)

Description

Professional manufacturer API 7-1 Drill Collar, Drill Collar Factory

API 7-1 Integral Spiral Drill Collar for Oil Drilling Drill collars are extra-heavy integral tools used to concentrate weight onto the drill bit so as to produce sufficient force for the drill bit to break rock efficiently while drilling. They are made of AISI 4145H or 4145H modified steel and are connected between drill pipes and drill bits.

Our drill collar connections comply with dimensional requirements specified in API Spec 7-1. Drill collars also come with slip and elevator recesses for safe and efficient handling. Slip and elevator recesses can be used together or separately.

Size: 42mm-168mm

Grade: E75,X95,G105,S135,R780

Length: R1(6.1-7.01m),R2(8.84-9.75m),R3(12.19-13.72m)

Thread type: NC26,NC31,NC38,NC40,NC46,NC50,NC56,5 1/2FH,6 5/8FH

Drill collar (spiral drill collar)
specification		NC23-31~NC70-100
All series of API specifications
executive standard		API Spec 7-1 API Spec 7-2
SIZE	OD		Id		Lmm	Shoulder chamfering diameter	Bending strength ratio of the reference
SIZE	mm	In	mm	in	Lmm	Shoulder chamfering diameter
NC31-41(2-7/8IF)	104.8	2004/1/8	50.8	2	9150	100.4	2.43:1
NC35-47	120.7	2004/3/4	50.8	2	9150	114.7	2.58:1
NC38-50(3-1/2IF)	127	5	57.2	2002/1/4	9150	121	2.38:1
NC44-60	152.4	6	57.2	2002/1/4	9150/9450	144.5	2.49:1
NC44-60	152.4	6	71.4	2-13/16	9150/9450	144.5	2.84:1
NC44-62	158.8	2006/1/4	57.2	2002/1/4	9150/9450	149.2	2.91:1
NC46-62(4IF)	158.8	2006/1/4	71.4	2-13/16	9150/9450	150	2.63:1
NC46-65(4IF)	165.1	2006/1/2	57.2	2002/1/4	9150/9450	154.8	2.76:1
NC46-65(4IF)	165.1	2006/1/2	71.4	2-13/16	9150/9450	154.8	3.05:1
NC46-67(4IF)	171.4	2006/3/4	57.2	2002/1/4	9150/9450	159.5	3.18:1
NC50-67(4-1/2IF)	171.4	2006/3/4	71.4	2-13/16	9150/9450	159.5	2.37:1
NC50-70(4-1/2IF)	177.8	7	57.2	2002/1/4	9150/9450	164.7	2.54:1
NC50-70(4-1/2IF)	177.8	7	71.4	2-13/16	9150/9450	164.7	2.73:1
NC50-72(4-1/2IF)	184.2	2007/1/4	71.4	2-13/16	9150/9450	169.5	3.12:1
NC56-77	196.8	2007/3/4	71.4	2-13/16	9150/9450	185.3	2.70:1
NC56-80	203.2	8	71.4	2-13/16	9150/9450	190.1	3.02:1
6-5/8REG	209.6	2008/1/4	71.4	2-13/16	9150/9450	195.7	2.93:1
NC61-90	228.6	9	71.4	2-13/16	9150/9450	212.7	3.17:1
7-5/8REG	241.3	2009/1/2	76.2	3	9150/9450	223.8	2.81:1
NC70-97	247.6	2009/3/4	76.2	3	9150/9450	232.6	2.57:1

Product Photos

Drill Pipe Outer Diameter		Thread Type	Steel Grade	Wall Thickness (mm)	End-Upset type	Length (mm)
inch	mm	Thread Type	Steel Grade	Wall Thickness (mm)	End-Upset type	Length (mm)
3	76	2-3/8" REG	R780, G105, S135	6, 8	IU/IEU	1000--5000
3-1/2	89	2 3/8'' IF NC26	R780, G105, S135	6.5, 8	IU/IEU	1000--5000
4	102	2 7/8'' IF NC31	R780, G105, S135	8, 9.19	IU/IEU	1000--5000
4-1/4	108	2 7/8'' IF NC31	R780, G105, S135	8, 9.19	IU/IEU	1000--5000
4-1/2	114	2 7/8'' IF NC31	R780, G105, S135	8, 10	IU/IEU	1500--6000
5	127	3 1/2'' IF NC38	R780, G105, S135	8, 10, 12	IU/IEU	1500--6000

2. Geological Drill Pipe

External Diameter		Upset type	Steel Pipe Grade	Pipe Wall Thickness	Normal Weight	Pipe length	Thread model	Joint Diameter
inch	mm			mm	Kg/m	mm		mm
1.6	42	EU	DZ50	6.5	5.7	1000-9000	1:16	57
			R780
2	50	EU,IU	DZ50	6.5	7.1	1000-9000	1:16	65
			R780					68
2.375	60	EU,IU	R780	7.1	9.4	1000-9000	NC26	75
			S135					78
2.875	73	EU,IU	R780	8	12.9	1000-9000	NC31	95
			G105	9.19	14.5
								105
			S135
3.5	89	EU,IU	R780	8	16	1000-9000	NC38	121
			G105
				9.5	19			127
			S135

3.Oil Drill Pipe

Size (in)	Nominal Weight (1b/ft)	OD of Pipe Body		Wall Thickness of Pipe Body		Grade	Upset Type	Conn. Type	OD of Pin and Box		ID of Pin
Size (in)	Nominal Weight (1b/ft)	(in)	(mm)	(in)	(mm)	Grade	Upset Type	Conn. Type	(in)	(mm)	(in)	(mm)
2 3/8	6.65	2 3/8	60.32	0.280	7.11	EXGS	EU	NC26 (2 3/8 IF)	3 3/8	85.70	1 3/4	44.45
2 7/8	10.40	2 7/8	73.02	0.36	9.19			NC31 (2 7/8 IF)	4 1/8	104.80	2	50.80
3 1/2	13.30	3 1/2	88.90	0.37	9.35			NC38 (3 1/2 IF)	5	127.00	2 7/16	61.91
3 1/2	15.50	3 1/2	88.90	0.45	11.40			NC38 (3 1/2 IF)	5	127.00	2 1/8	53.98
4	14.00	4	101.60	0.33	8.38			NC46 (4 IF)	6	154.20	3 1/4	82.55
4 1/2	16.60	4 1/2	114.30	0.34	8.56		IEU	NC40 (4 IF)	6 1/4	158.80	3	76.20
4 1/2	20.00	4 1/2	114.30	0.43	10.92			NC46 (4 IF)	6 1/4	158.75	2 1/2	63.50
5	19.50	5	127.00	0.36	9.19			NC50 (4 1/2 IF)	6 5/8	168.30	3 1/4	82.55
5	19.50	5	127.00	0.36	9.19			5 1/2 FH	7	177.80	3 3/4	95.25
5	25.60	5	127.00	0.50	12.70			NC50 (4 1/2 IF)	6 5/8	168.28	2 3/4	69.85
5	25.60	5	127.00	0.50	12.70			5 1/2 FH	7 1/4	184.15	3 1/4	82.55
5 1/2	21.90	5 1/2	139.70	0.36	9.17			5 1/2 FH	7 1/4	184.15	3 1/2	88.90
5 1/2	24.70	5 1/2	139.70	0.42	10.54			5 1/2 FH	7 1/4	184.15	3 1/2	88.90
6 5/8	25.20	6 5/8	168.28	0.33	8.38			6 5/8 FH	8 1/4	209.55	4 3/4	120.65
6 5/8	27.70	6 5/8	168.28	0.36	9.19			6 5/8 FH	8 1/4	209.55	4 3/4	120.65

4. HDD Drill Pipe(Friction welding or Forged type)

Diameter(mm)	Length(mm)	Thread type	Craft	Connection type
50	1000-3000	API 2 3/8 REG	Friction welding	Box/pin
60	1000-3000	API 2 3/8 REG	Friction welding	Box/pin
76	1500-3000	API 2 3/8 REG	Friction welding	Box/pin
89	1500-3000	NC26(2 3/8IF)	Friction welding	Box/pin
102	1500-6000	NC31(2 7/8IF)	Friction welding	Box/pin
108	1500-6000	NC31(2 7/8IF)	Friction welding	Box/pin
114	1500-6000	NC31(2 7/8IF) OR NC35	Friction welding	Box/pin
127	1500-6000	NC38(3 1/2IF)	Friction welding	Box/pin

Remarks: We can produce drill pipe as per your request.

5.Raw Material performances

Steel Grade	Yield Strength		Tensile Strength
Steel Grade	Min(Mpa)	Max(Mpa)	Min(Mpa)	Max(Mpa)
E-75	517	724	100	689
G105	724	931	793
S135	931	1138	1000
R780	520	666	780	876

Drill pipe usage notes:

1.New drill pipe should be pasted oil before connection
2.Make up and break at least 3 times before drilling
3.Hard bending and plastic coating can be processed according to clients' special requirements.

Product Application

There are different kinds of drill collars,including round drill collar,spiral drill collar,non-magnetic drill collar,square drill collar and so on.Ordinary drill collar is the circular cross section, the center has a water hole,the wall thickness is larger,the nozzle is smaller, the weight of per unit length is greater than the size of drill pipe almost 4- 5 times .The majority of drill collar is thread processing directly on the pipe body , but some of them also use the replaced joint.

Features

(1)Eccentric-weight drill collar is an effective anti-deviation drilling tool,with high drill pressure used in oblique areas,rectifying oblique as well.

(2)When drilling directional wells eccentric-weight drill collar is an effective tool to reduce oblique or straighten the well hole using high drilling pressure.

(3)Eccentric-weight drill collar has the advantages of simple structure,convenient use,connected directly to common drill collar without centralizers,greatly convenient for sinking in,fishing and milling operations.

(4)Eccentric-weight drill collar runs downhole safely,danger of leakage or bit freezing hard to appear.

(5)Pay much attention to avoid mud balling and prevent effect of anti-deviation .