Products > Drilling Equipment

Drill Collar

Product Number: KW-DE-05 Drill collars are manufactured strictly according to API Spec7-1 standard; The size of drill collar is from 3-1/8 to 11 inches

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KINGWELL Drill Collar Features & Benefits:

Kingwell supplies slick drill collars, spiral drill collars and non-magnetic drill collars etc. The size of drill collar is from 3-1/8 to 11 inches.

Drill collars are manufactured strictly according to API Spec7-1 standard.

Material: 4145H, 4145H Mod, Non Magnetic
Type: Slick Drill Collar, Spiral Drill Collar
Size: 3 1/8" - 14"
Hardbanding: ANRCO 100 XT, 200XT, 300XT.

KINGWELL is young team who is dedicated to provide global customer base with quick turnaround solutions extends across the entire drilling solutions. Kingwell team can provide bespoke. fit for purpose solutions, and rapidly convert concept to completion.

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l Working with an experienced and dynamic team like us, you'll never be disappointed. Pls contact us to achieve your plan.

Drill collars are manufactured strictly according to API Spec7-1 standard; The size of drill collar is from 3-1/8 to 11 inches.

Material: 4145H, 4145H Mod, Non Magnetic
Type: Slick Drill Collar, Spiral Drill Collar
Size: 3 1/8" - 11"
Hardbanding: ANRCO 100 XT, 200XT, 300XT.

• Slick
• Flex
• Spiral
• Special

• Slick Non-Mag Drill Collar

Kingwell Slick Non-Mag Drill Collar provides the required weight on bit, and will not interfere with the directional drilling ability.

• Spiral Non-Mag Drill Collar

Kingwell Spiral Non-Mag Drill Collar is designed to allow greater flow area for drilling fluids, while providing the benefits of non-mag steel for complex drilling programs.

• Flex Non-Mag Drill Collar

Kingwell Flex Non-Mag Drill Collar is thinner and more flexible than standard drill collar. Their ability to make short radius turns, bend for high build angles, and pass through severe doglegs makes them ideal for use in directional and horizontal applications. Manufactured with non-mag steel, this drill collar is well suited for housing MWD equipment.

When ordering please specify:
• Drill collar OD and ID;
• Material;
• Overall length;
• Connections required (size and type);
• Special features desired, for example;
• Slick、Spiral、Flex、Special;
• Stress Relief Features;
• Hardbanding;
The Non-mag Drill Collar has an important role in the bottom hole assembly.

Non-mag drill collars are used to provide magnetic spacing, protecting the downhole directional sensors from magnetic interference. Kingwell offers non- mag drill collars that from a specific alloy of non-magnetic elements, manufactured as API standards.

Non-mag Drill Collar

The following special processes are uniformly compressed surface layers:

• Hammer Peening
• Roller Burnishing
• Shot Peening
The pitting and stress corrosion resistance of non-magnetic drill collars is improved by increasing the content of Chromium, Molybdenum, Nitrogen and other alloying elements.

All Kingwell non-magnetic materials generally exhibit excellent stress corrosion resistance

Testing of drill collars during production:

• Impact Test
• Tensile Test
• Hardness Test
• Oxalic Acid Test
• Metallographic
• Ultrasonic Test
Probe Test

KINGWELL Drill Collar Technical Data:

OD		ID		L(mm)	DF(mm)	Bending Strength ratio	Drill Collar Nominal size
mm	in	mm	in	L(mm)	DF(mm)	Bending Strength ratio	Drill Collar Nominal size
79.4	3-1/8	31.8	1-1/4	9,150	76.2	2.57:1	NC23-31
88.9	3-1/2	38.1	1-1/2	9,150	82.9	2.42:1	NC26-35(2-3/8IF)
104.8	4-1/8	50.8	2	9,150	100.4	2.43:1	NC31-41(2-7/8IF)
120.7	4-3/4	50.8	2	9,150	114.7	2.58:1	NC35-47
127	5	57.2	2-1/4	9,150	121	2.38:1	NC38-50(3-1/2IF)
152.4	6	57.2	2-1/4	9,150/9,450	144.5	2.49:1	NC44-60
152.4	6	71.4	2-13/16	9,150/9450	144.5	2.84:1	NC44-60
158.8	6-1/4	57.2	2-1/4	9,150/9,450	149.2	2.91:1	NC44-62
158.8	6-1/4	71.4	2-13/16	9,150/9,450	150	2.63:1	NC46-62(4IF)
165.1	6-1/2	57.2	2-1/4	9,150/9,450	154.8	2.76:1	NC46-65(4IF)
165.1	6-1/2	71.4	2-13/16	9,150/9,450	154.8	3.05:1	NC46-65(4IF)
171.4	6-3/4	57.2	2-1/4	9,150/9,450	159.5	3.18:1	NC46-67(4IF)
171.4	6-3/4	71.4	2-13/16	9,150/9,450	159.5	2.37:1	NC50-67(4-1/2IF)
177.8	7	57.2	2-1/4	9,150/9,450	164.7	2.54:1	NC50-70(4-1/2IF)
177.8	7	71.4	2-13/16	9,150/9,450	164.7	2.73:1	NC50-70(4-1/2IF)
184.2	7-1/4	71.4	2-13/16	9,150/9,450	169.5	3.12:1	NC50-72(4-1/2IF)
196.8	7-3/4	71.4	2-13/16	9,150/9,450	185.3	2.70:1	NC56-77
203.2	8	71.4	2-13/16	9,150/9,450	190.1	3.02:1	NC56-80
209.6	8-1/4	71.4	2-13/16	9,150/9,450	195.7	2.93:1	6-5/8REG
228.6	9	71.4	2-13/16	9,150/9,450	212.7	3.17:1	NC61-90
241.3	9-1/2	76.2	3	9,150/9,450	223.8	2.81:1	7-5/8REG
247.6	9-3/4	76.2	3	9,150/9,450	232.6	2.57:1	NC70-97
254	10	76.2	3	9,150/9,450	237.3	2.81:1	NC70-100
279.4	11	76.2	3	9,150/9,450	266.7	2.84:1	8-5/8 REG