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A guide to drill collar

About Us

We Super Steel Manufacturing Co.,Ltd(SMC) are amongst the top manufacturers and suppliers for the seamless steel pipe, welded steel pipe, OCTG products and fittings from China. We have been manufacturing and supplying these products to the industry since 1993, and received repeat orders and appreciation from our valued customers.

Products

Welded Steel Pipe

Welded steel pipe, also known as welded pipe, is a steel pipe made of steel plate or steel strip after being crimped and welded. Welded steel pipes have simple production process, high production efficiency, many varieties and specifications.Welded steel pipes for low-pressure fluid transportation (API 5L) are also known as general welded pipes, commonly known as black pipes. Welded steel pipe for conveying general lower pressure fluids such as water, gas, air, oil and heating steam and other purposes. Super Steel Manufacturing can offer SAWL/LSAW Steel Pipe, SSAW Steel Pipe, EFW/ERW Steel Pipe in standard size or as customer’s requirement.

Seamless Steel Pipe

Seamless pipe made of a single piece of metal with no seams on the surface is called a seamless steel pipe. According to the production method, the seamless pipe is divided into a hot rolled pipe, a cold rolled pipe, a cold drawn pipe, an extruded pipe, a top pipe, and the like. According to the shape of the section, the seamless steel pipe is divided into two types: a circular shape and an irregular shape, and the shaped pipe has a square shape, an elliptical shape and the like. The maximum diameter is 650mm and the minimum diameter is 0.3mm. Seamless steel pipe is mainly used as petroleum geological drilling pipe, cracking pipe for petrochemical industry, boiler pipe, bearing pipe and high-precision structural steel pipe for automobile, tractor and aviation.

ASTM A53 Seamless Pipe

API 5L Seamless Pipe

ASTM A106 Steel Pipe

Boiler steel Tube

Cold Drawn Seamless Pipe

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Stainless Steel Pipe

Stainless steel pipe is used for transporting liquids and gasses in a wide range of industries including mining, oil, natural gas, automotive, and aviation. Super Steel can provide Stainless Seamless Steel Pipe, Stainless Welded Steel Pipe, Stainless Steel Screen Pipe and Stainless Hollow Section in standard sizes, or you can have it custom cut to your specifications.

Stainless Seamless Steel Pipe

Stainless Welded Steel Pipe

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Alloy Steel Pipe

Alloy steel pipe is a kind of seamless steel pipe, its performance is much higher than the general seamless steel pipe, because this steel pipe inside containing Cr, high temperature resistance, low temperature, corrosion-resistant performance of other non-pipe joints not match, so the more extensive use of alloy tube in the petroleum, aerospace, chemical, electric power, boiler, military, and other industries.

Copper-Nickel Pipe/Tube

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OCTG Pipe

Oilfield tubular goods of Surper Steel is a collection of seamless rolled products consisting of Tubing and Casing, Slotted Pipe, Drill Pipe and Drill Collar, Pup Joint and Coupling, which are useful in the oil and gas production activities. These OTCG products are manufactured according to the specifications set by API. OCTG can be either seamless or welded and are available in different sizes and lengths.

API 5CT Pipe

Casing steel pipe

Drill Pipe And Drill Collar

Pup Joint

Slotted Pipe

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Hollow Section

A hollow structural section (HSS) is a type of metal profile with a hollow cross section. The steel hollow section is made up of various material welded structural hollow sections for multiple purposes. No matter building construction, or spare parts manufacturing, even working parts construction. It is also used in these projects. Here are products Mild Steel Square Tube, Mild Steel Rectangular Tube, Stainless Steel Square Tube, Stainless Steel Rectangular Tube.

Circular Hollow Sections

Rectangular Tube

Square steel tube

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Coated Steel Pipe

Coated steel pipe means the pipe that is by the processing after the corrosion, which can effectively prevent or slow the steel pipe occurs in the course of transport and chemical or electrochemical reaction corrosion phenomena. Coated steel pipe can effectively prevent or slow down the corrosion of steel pipes to extend service life and reduce operating costs pipe. Super Steel Manufacturing is a supplier that can offer Galvanized Steel Pipe, FBE Coated Pipe, Epoxy Coated Pipe, 3LPE/3PE Coated Pipe.

3PE Steel Pipe

Epoxy Coating Pipe

FBE Coating Pipe

Galvanized Steel Pipe

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Finned Steel Tube

Fin tubes are a type of heat exchanger that is used in many different industries. These tubes have a finned surface, which increases their surface area and allows them to transfer heat more efficiently. This makes them ideal for applications where high heat transfer rates are required, such as in power plants and refrigeration systems. Fin tubes are made from a variety of materials, including copper, aluminum, and stainless steel. They are available in a range of sizes and shapes and can be customized to meet the specific needs of each application.

Finned Steel Tube

Studded Tube

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Pipe Fittings

Pipe Fittings are defined as the piping components that help in pipe routing for directional changes, size changes, and branch connections. Super Steel is one of the top supplier of Flange, Elbow / Reducer / Tee / Cap / Bend and Valves, which are widely used in both the piping and plumbing industries.

Steel Plate & Beam

Steel plates normally stand for steel plates 6mm or thicker and are made by hot-rolling a semiproduct slab 200mm or thicker and then through follow-up processes such as cooling or heat treatment. Steel plates ramify into products for general structure, welding, boiler or large-diameter steel pipes depending on material. Super Steel Manufacturing can offer Alloy Steel Plate, Carbon Steel Plate, Nickel Alloy Sheet/Plate, Stainless Steel Plate,C Channel, H/I Beam,Steel Bar.

Workshop

High quality piping products from approved manufacturers.
In order to continuously improve our offerings to our clients, we have consistently improved and upgraded our manufacturing facility and can hence offer material with stringent requirements.

Projects

Over the years, Super Steel Manufacturing Co.,Ltd(SMC) has developed an enviable reputation for project management for the Oil & Gas, Construction, Power Energy, Marine & Offshore, Water Treatment, Exploration & Drilling Services, Pipeline & Petrochemical and other heavy industries.
The many years of experience that we have means that there is always someone who has the ability to carry a project forward.

Services

Super Steel Manufacturing Co.,Ltd(SMC) adheres to the principle of being customer-oriented, focusing on customers and meeting their requirements. We respond quickly and customize products and solutions for end users.

News

Always up to date. In this column you can find the steel pipe related articles, including industry trends, product standards and materials, and some technical guidelines.

Product News

A guide to drill collar

Date:2025-02-21

Drill collars are a crucial component of the drill string, providing support to the drill bit and enhancing the rigidity of the string. Manufactured in strict accordance with API Spec 7-1 standards, our drill collars are made from AISI 4145 Mod steel. We offer a variety of drill collars, including slick and spiral types, with sizes ranging from 3-1/8” to 11 inches. Custom sizes and configurations can also be produced based on specific customer requirements.

Super Steel Manufacturing Co.,Ltd is professional drill collars manufacturer, for more details, please contact:sales@super-steels.com

Product Features of Drill Collar

- State-of-the-Art Equipment:

High-performance machinery ensures efficient processes like heat treating and friction welding, optimizing the manufacturing flow.

- Compliance with Global Standards:

Meets the international specifications of API 5DP, API 7G, and ISO 9001.

- Advanced Inspection & Quality Control:

Equipped with precision instruments to guarantee top-tier product quality and consistent performance.

Specifications of Drill Collar

Item	Name	Spiral or Slick	O.D	I.D	Tool joint		Bevel diameter in	Material	Overall length
Item	Name	Spiral or Slick	in	in	Connection		Bevel diameter in	Material	ft
1	Drill collar	Slick or Spiral	3.1/8	1.1/4	NC26	2.3/8"IF	3	4145H	30 or 31
2	Drill collar	Slick or Spiral	3.1/2	1.1/2	NC26	2.3/8"IF		4145H	30 or 31
3	Drill collar	Slick or Spiral	4.1/8	2	NC31-41	2.7/8"IF	3.61/64	4145H	30 or 31
4	Drill collar	Slick or Spiral	4.3/4	2	NC35-47		4.33/64	4145H	30 or 31
5	Drill collar	Slick or Spiral	5	2.1/4	NC38-50	3.1/2"IF	4.49/64	4145H	30 or 31
6	Drill collar	Slick or Spiral	6	2.1/4	NC44-60		5.11/16	4145H	30 or 31
7	Drill collar	Slick or Spiral	6	2.13/16	NC44-60		5.11/16	4145H	30 or 31
8	Drill collar	Slick or Spiral	6.1/4	2.1/4	NC44-62		5.7/8	4145H	30 or 31
9	Drill collar	Slick or Spiral	6.1/4	2.13/16	NC46-62	4"IF	5.29/32	4145H	30 or 31
10	Drill collar	Slick or Spiral	6.1/2	2.1/4	NC46-65	4"IF	6.3/32	4145H	30 or 31
11	Drill collar	Slick or Spiral	6.1/2	2.13/16	NC46-65	4"IF	6.3/32	4145H	30 or 31
12	Drill collar	Slick or Spiral	6.3/4	2.1/4	NC46-67	4"IF	6.9/32	4145H	30 or 31
13	Drill collar	Slick or Spiral	7	2.1/4	NC50-70	4.1/2"IF	6.31/64	4145H	30 or 31
14	Drill collar	Slick or Spiral	7	2.13/16	NC50-70	4.1/2"IF	6.31/64	4145H	30 or 31
15	Drill collar	Slick or Spiral	7.1/4	2.13/16	NC50-72	4.1/2"IF	6.43/64	4145H	30 or 31
16	Drill collar	Slick or Spiral	7.3/4	2.13/16	NC56-77		7.19/64	4145H	30 or 31
17	Drill collar	Slick or Spiral	8	2.13/16	NC56-80		7.31/64	4145H	30 or 31
18	Drill collar	Slick or Spiral	8.1/4	2.13/16	6.5/8"REG		7.45/64	4145H	30 or 31
19	Drill collar	Slick or Spiral	9	2.13/16	NC61-90		8.3/8	4145H	30 or 31
20	Drill collar	Slick or Spiral	9.1/2	3	7.5/8"REG		8.13/16	4145H	30 or 31
21	Drill collar	Slick or Spiral	9.3/4	3	NC70-97		9.5/32	4145H	30 or 31
22	Drill collar	Slick or Spiral	10	3	NC70-100		9.11/32	4145H	30 or 31
23	Drill collar	Slick or Spiral	11	3	8.5/8"REG		10.1/2	4145H	30 or 31
Note:	If theclient has any specialrequirement, for example compound,cold rolling,make and break,hard banding (ARNCO 100XT ARNCO 300XT etc), internal coating (TK34 TK34PTC2000, etc),Stress- Relief Pin, Bored Back Box,Elevator Recess, slip Recess please feel free to contact us.