Drill Pipe

Your Professional Drill Pipe Supplier

Wuxi Junzhi Machinery Equipment Manufacturing Co., Ltd was established in the early 1990s. In the early days of the factory, it mainly cooperated with Shanghai Baoshan Iron and Steel Group Corporation, Shanghai Electric Group Heavy Machinery Plant, and Shanghai Tunnel Company Machinery Manufacturing Branch to engage in the manufacturing and processing of supporting parts for metallurgical and mining equipment, and complete sets of customized processing of non-standard equipment in other machinery industries.The main processing equipment includes CNC plasma cutting equipment, gas shielded welding, large CNC lathes, CNC gantry milling, vertical machining centers, ultrasonic flaw detectors, hardness testers, etc.

Why Choose Us

High Quality
Our factory strictly implements the GB/T9 001-2008 quality system, and continuously improves its products to win customer satisfaction.

Professional Team
After years of continuous development, the factory has trained a group of high-quality workers and technical teams.

24-Hour Service
Our dedicated 24-hour online support ensures prompt responses, providing you with an excellent shopping experience. Feel free to reach out with any questions at any time.

Our Factory
Wuxi Junzhi Machinery Equipment Manufacturing Co., Ltd. (formerly Wuxi Yaqing Machinery Factory), the new factory is located at No. 1087 Guangshi Road, Luoshe Town, Huishan District, Wuxi City, 20 minutes away from Beijing-Shanghai High-speed Railway, 15 minutes away from Wuxi Airport, and about 40 minutes away from Taihu Lake and other famous scenic spots. The transportation is very convenient.

Types of Drill Pipe

Standard Drill Pipes

Made of high-strength steel, standard drill pipes are the most commonly used in both oil and gas drilling as well as mining. Conventional drill pipes are strong and reliable in normal drilling conditions.

Heavy Weight Drill Pipes

These pipes are thicker and stronger than standard drill pipes, designed to provide more weight on the drill bit without compromising flexibility.

High Torque Drill Pipes

Description: These pipes are designed with thicker walls and stronger connections to handle high torque drilling.

Composite Drill Pipes

Composite drill pipes are not metallic; they may be made with carbon fibres or any other synthetic composite material.

Tool Joints Parameter

Tool joint designation	Size and style	Nom.Wt(kg/m)
NC26(2 3/8IF)	2 3/8EU	9.90
NC31(2 7/8IF)	2 7/8EU	15.49
NC38	3 1/2EU	14.15
NC38(3 1/2IF)	3 1/2EU	19.81 23.09
NC40(4FH)	3 1/2EU 4IU	23.09 20.85
NC46(4IF)	4EU	20.85
	4 1/2IU 4 1/2IEU	20.48 24.73
	4 1/2IEU	29.79
NC50 4 1/2IF	4 1/2EU 4 1/2EU	20.48 24.73
	4 1/2EU	29.79
	5IEU	29.05
	5IEU	38.13
5 1/2FH	5IEU	29.05
	5IEU	38.13
	5 1/2IEU	32.62
	5 1/2IEU	36.79
6 1/2FH	6 5/8IEU	37.54
6 1/2FH	6 5/8IEU	41.29

Aluminum Drill Pipe for Seabed Drilling Rigs

Features of Drill Pipe

(1) The end of the drill pipe is heated by medium frequency, hydraulically upset, and heat treated to effectively eliminate the internal stress caused by the previous processing.

(2) The lock joint is made of 40Cr or 42CrM0 material, and is subjected to tempering heat treatment after rough machining, and surface nitriding treatment after fine machining, which can effectively prevent the problems of sticking and pulling, and is more wear-resistant and easy to disassemble.

(3) All threads are cut and formed using forming blades on CNC lathes to ensure precise fit and strong interchangeability.

Specifications

Nominal size, weight and grade	Connection	Tool joint OD (in.)	Tool joint ID (in.)	Max MUT (ft-lb)	Tensile capacity (lb)
3½ in. 15.5 ppf (0.449 in.) S-135	NC-38	5	2⅛	15,900	451,100
3½ in. 15.5 ppf (0.449 in.) S-135	GPDS™ 38	5	2 7⁄16	17,400	451,100
4 in. 15.7 ppf (0.380 in.) S-135	Delta™ 391	4⅞	2 11⁄16	21,400	456,900
4½ in. 20.0 ppf (0.430 in.) S-135	Delta™ 425	5⅜	3	30,300	482,800
5 in. 25.6 ppf (0.500 in.) S-135	NC-50	6⅝	2¾	38,000	746,400
5 in. 25.6 ppf (0.500 in.) S-135	GPDS™ 50	6⅝	3¼	43,000	746,400
5 in. 25.6 ppf (0.500 in.) S-135	Delta™ 471	5⅞	3¼	37,900	746,400
5 in. 25.6 ppf (0.500 in.) S-135	Delta™ 527	6½	3½	55,400	746,400
5 in. 25.6 ppf (0.500 in.) S-135	Delta™ 544	6⅝	3⅝	58,300	746,400
5½ in. 24.7 ppf (0.415 in.) S-135	5½ Full Hole (FH)	7	4	33,400	704,300
5½ in. 24.7 ppf (0.415 in.) S-135	Delta™ 544	6⅝	4	50,300	704,300

Packing and Transport

Packing: Seaworthy Packing
Delivery: About 30 days after your down payment.

FAQ

Q: What is the function of the drill pipe?

A: The role of the drill pipe is mainly to transmit torque and axial pressure, and to transport flushing fluid, chemical slurry, cement slurry, etc.

Q: How do I identify a drill pipe?

A: Drillpipe identification is marked at the base of the pin by the tool joint manufacturer after the pin is affixed.

Q: How is drill pipe measured?

A: Methods for measuring Drill pipe length:
- Use a calibrated measuring tape or laser distance meter. - Measure from the shoulder of the pin end to the face of the box end. - Ensure the pipe is straight and on a level surface. - Take multiple measurements and average the results for increased accuracy.

Q: How thick is drill pipe?

A: Note that drill pipes will have different thicknesses, which are specified. Examples include (but are not limited to) 2 ⅜ inch thick drill pipe, 5 inch thick drill pipe, and 6 ⅝ inch drill pipe.

Q: How is drill size calculated?

A: As a rule of thumb, for Metric threads, the tapping drill can be calculated by subtracting the pitch from the diameter of the thread. eg for an M5x0. 75 thread the tapping drill is 5-0.75mm = 4.25mm. For Imperial (inch) threads the tapping drill size is calculated in the same way, diameter minus pitch.

Q: How do I choose a drill size?

A: The diameter of the hole you drill should be slightly smaller than the diameter of the screw. So, for example, if you're using a 3.5 mm screw, use a drill bit with a diameter of 3 mm. If you're using wall anchors as well as screws, the drill bit and anchors should have the same diameter.

We're professional drill pipe manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to buy high-grade drill pipe from our factory.

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