Heavy Weight Drill Collar & Spiral Drill Collar – API Certified for Oilfield Drillingp530p550p650

• Customization: Available
• After-sales Service: Lifetime Support
• Warranty: 12months
• Model NO.: I Drill Collar
• Manufacturing Process: CNC Milling
• Surface Treatment: Polishing
• Operation Pressure: Atmospheric Pressure
• Material: Cast Aluminum
• Colour: Blue...
• Transport Package: Wooden
• Specification: 79.4-279.4mm
• Trademark: KAIDI
• Origin: China
• HS Code: 8401100000
• Production Capacity: 50000pieces a Year

Product Description

Product Name: Premium API Drill Collar for Precision Oil & Gas Drilling
Application: Oil and Gas Drilling                         P530,P550,P650

A. Slick Drill Collar

Note: Drill collar is mainly used to provide bit weight to drill bit so that drill pipe is in tension. Especially drill collar can keep drill bit centralized and hole track by large rigidity. The Drill collar are manufactured strictly from API Spec7-1 and SY5411 standard.

B. Spiral Drill Collar

Note: Spiral drill collar is used to reduce contact area with hole so as to avoid efficiently bit sticking from diffirential pressure. The drill collars are manufactired strictly according to API Spec7-1 and Standard SY5144

C. Spiral Drill Collar With Elevator Groove And Slip Groove

Note: Elevator groove and slip groove made on box thread face of slick drill collar or spiral drill collar can be used as lifting sub and safety slip when trip out. The technical parameters for elevator groove and slip groove is as per API SPEC7-1. Hardbanding is optional at customers' requests.

D. Non-magnetic Drill Collar

The as cold rooled finish on both ID and OD surface with unique technical process strengthen the structure and ensures the tools with optimal resistance to stress,corrosion,cracking and the mechanical performance is greatly enganced.

Key Features:
High-Precision Manufacturing - Strictly compliant with API standards, ensuring superior dimensional accuracy and strength for harsh drilling conditions.

Premium Material - Made of high-strength alloy steel, heat-treated, and inspected via ultrasonic testing for enhanced fatigue resistance and durability.

Wear & Corrosion Resistant - Special surface treatment improves abrasion and corrosion resistance, extending service life.

Stable Drilling Performance - Optimized design minimizes vibration, enhances verticality, and reduces drilling risks.

Wide Compatibility - Suitable for various rigs and compatible with API-standard drill pipes and bits.

Usage Instructions:
Installed below the drill pipe to provide weight, stabilize the drill string, and improve drilling accuracy.

Inspect threads before use to ensure secure connections and prevent downhole failures.

Regular maintenance and non-destructive testing (NDT) are recommended to ensure safe operation.

Compliance Standards: API 7-1 / ISO 11961

When ordering please specify:
Drill Collarmodel;
Connection, if non-standard;
size and weight.
Contact for Technical Support:
LAURA Manager

  

Number And Connection Table	Product Code	OD		ID		Length mm	Bevel Diameter mm	Bending Strength Ratio
		mm	in	mm	in
NC23-31	Z01/Z02-01000	79.4	3 1/8	31.8	1 1/4	9150	76.2	2.57:1
NC26-35(2 3/8 IF)	Z01/Z02-02000	88.9	3 1/2	38.1	1 1/2	9150	84.5	2.42:1
NC31-41(2 7/8 IF)	Z01/Z02-04000	104.8	4 1/8	50.8	2	9150	101.6	2.43:1
NC35-47	Z01/Z02-06000	120.6	4 3/4	50.8	2	9150	114.7	2.58:1
NC38-50(3 1/2 IF)	Z01/Z02-07000	127	5	57.2	2 1/4	9150	121	2.38:1
NC44-60	Z01/Z02-23000	152.4	6	57.2	2 1/4	9150 or 9450	144.5	2.49:1
NC44-60	Z01/Z02-23100	152.4	6	71.4	2 13/16	9150 or 9450	144.5	2.84:1
NC44-62	Z01/Z02-08000	158.8	6 1/4	57.2	2 1/4	9150 or 9450	149.2	2.91:1
NC46-62(4 IF)	Z01/Z02-08100	158.8	6 1/4	71.4	2 13/16	9150 or 9450	150	2.63:1
NC46-65(4 IF)	Z01/Z02-09000	165.1	6 1/2	57.2	2 1/4	9150 or 9450	154.8	2.76:1
NC46-65(4 IF)	Z01/Z02-09100	165.1	6 1/2	71.4	2 13/16	9150 or 9450	154.8	3.05:1
NC46-67(4 IF)	Z01/Z02-11000	171.4	6 3/4	57.2	2 1/4	9150 or 9450	159.5	3.18:1
NC50-67(4 1/2 IF)	Z01/Z02-11100	171.4	6 3/4	71.4	2 13/16	9150 or 9450	159.5	2.37:1
NC50-70(4 1/2 IF)	Z01/Z02-12000	177.8	7	57.2	2 1/4	9150 or 9450	164.7	2.54:1
NC50-70(4 1/2 IF)	Z01/Z02-12100	177.8	7	71.4	2 13/16	9150 or 9450	164.7	2.73:1
NC50-72(4 1/2 IF)	z01/z02-24000	184.2	7 1/4	71.4	2 13/16	9150 or 9450	169.5	3.12:1
NC56-77	Z01/Z02-13000	196.8	7 3/4	71.4	2 13/16	9150 or 9450	185.3	2.70:1
NC56-80	Z01/Z02-14000	203.2	8	71.4	2 13/16	9150 or 9450	190.1	3.02:1
6 5/8 REG	Z01/Z02-15000	209.6	8 1/4	71.4	2 13/16	9150 or 9450	195.7	2.93:1
NC61-90	Z01/Z02-16000	228.6	9	71.4	2 13/16	9150 or 9450	212.7	3.17:1
7 5/8 REG	Z01/Z02-17000	241.3	9 1/2	76.2	3	9150 or 9450	223.8	2.81:1
NC70-97	Z01/Z02-25000	247.6	9 3/4	76.2	3	9150 or 9450	232.6	2.57:1
NC70-100	Z01/Z02-18000	254	10	76.2	3	9150 or 9450	237.3	2.81:1
8 5/8 REG	Z01/Z02-19000	279.4	11	76.2	3	9150 or 9450	266.7	2.84:1

 

 
FAQ for Oilfield Machinery Products

Q1:Do your products comply with API/ISO international standards?
Answer: Yes, our products fully comply with API Spec 7-1, API 6A, and are certified with ISO 9001.
Q2:How do we ensure quality?
Answer:Production samples are always made before mass production.
A final inspection is always conducted before shipment.
Q3:: Are you the manufacturer? What petroleum machinery products do you mainly offer?
Answer: Yes, we are a professional manufacturer integrating R&D, production and export with our own production base. Our main products include:
Fishing Tools (e.g., overshots, fishing spears, milling shoes
Drilling Tools (e.g., drill pipes, stabilizers, reamers)
Valves (e.g., gate valves, check valves, safety valves)
Other downhole equipment, etc.
 
Q4:What is the warranty period? How to claim it?
Answer: 12-month warranty. Provide the serial number and fault description for a response within 48 hours.
Q5:Do you provide technical training or on-site support?
Answer: Free remote training is available. On-site support costs are negotiable.
Q6: What is the lead time for delivery?
Answer: 30 days for standard products; 60-90 days for customized orders (subject to complexity).
Q7: What shipping methods do you offer? How to track orders?
Answer: Sea express shipping available. Tracking number and link provided after shipment.
Q8: How do you package the products to prevent rust during sea shipping?**  
Answer:Packaging includes anti-rust oil, vacuum sealing, wooden crates, and desiccants.*  
Q9:Do you accept customized orders?
Answer: OEM is accepted. Submit detailed drawings or specifications for a quote.
Q10:How to get your latest product catalog?For any further detailed inquiries, please feel free to contact us .