Drill Collar/DC/API Spec 7/4130/API 7-1

• Customization: Available
• After-sales Service: 7X24
• Warranty: 12months
• Model NO.: DC
• Manufacturing Process: Forging
• Surface Treatment: Sand Blast
• Operation Pressure: as Required
• Material: Alloy
• Standard: API Spec 5dp
• Transport Package: Steel Strap Packaged
• Specification: 2-7/8"-5-1/2"
• Trademark: LFM
• Origin: China

Product Description

Product Description
Drill Collar
LFM Drill Collar
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.
 

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
	mm	In	mm	in
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

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FAQ

Q1: What's your packing?
A:  Regular packing.

Q2: What's your delivery?
A:  Normally, about 30-45 days.

Q3:  What are the shipping methods?
A: Ocean shipment to the port near from you; Air shipment to the shipment near from your company; Door to door service by  international express.

Q4:  What about the payment options?
 A: In general, we accept T/T. 

Q5:  When can I get the price?
A: We usually quote within 24 hours after we get your inquiry. If you are very urgent to get the price,please call us or tell us in  your  email so that we will detail with your inquiry priority.