Drill Pipe

Unitesteel Drilling provides a complete line of drill string products, including a full range of jointed drill pipe in nominal sizes from 2-3/8" to 6-5/8" and in a wide range of wall thicknesses.

Unitesteel Drilling drill pipe is designed to provide superior technical performance and a service lifetime exceeding most current industry standards. Unitesteel Drilling drill pipe is available with:

• Proprietary oversized minimum internal upset (miu), for better fatigue resistance (where applicable);
• Longer tool joints, providing a maximum re-cut capability for longer service life; and

Higher toughness specification on pipe body, weld and tool joint, providing greater safety margins in extreme drilling conditions.

Unitesteel Drilling tool joint forgings meet or exceed API specifications and tolerance requirements. Each joint is inspected to guarantee visual and dimensional properties, and tested to ensure proper mechanical characteristics. All Unitesteel Drilling tool joint forgings are:

• 100% thread-gauged;
• 100% magnetic-particle inspected;
• Phos-coated (anti-galling treatment); and
• Hardness-tested.

Do not hesitate to contact our sales representatives with special needs to evaluate feasibility.

One of the most critical sections in welded drill pipe is the transition zone between the tool joint and the pipe body. A smooth, gradual transition linked to the superior nature of the purity of our steel ensures minimum stress concentration and greatly improves the fatigue life of the pipe. 

Unitesteel Drilling tool joint forgings meet or exceed API specifications and tolerance requirements. Each joint is inspected to guarantee visual and dimensional properties, and tested to ensure proper mechanical characteristics. All Unitesteel Drilling tool joint forgings are:

• 100% thread-gauged;
• 100% magnetic-particle inspected;
• Phos-coated (anti-galling treatment); and
• Hardness-tested.

Do not hesitate to contact our sales representatives with special needs to evaluate feasibility.

Our Drill Pipe

In business and in life, we all strive to get the most value for our dollar. We weigh price, availability, and quality. We offer competitive pricing without sacrificing quality in materials and workmanship. Our drill pipe is manufactured utilizing raw materials that are purchased in quantity from reliable reliable sources. API drill pipe sizes meet or exceed E75 specifications. Tool joints are 4140 quench & tempered alloy steel. We can offer drill pipe manufactured to API Sec 5D with complete specification packages.


The manufacturing philosophy is based on employing skilled craftsmen to produce parts to specification and utilizing optimal manufacturing methods and equipment to reduce costs. These manufacturing methods and equipment investment are instrumental in being able to offer these quality products at competitive pricing.


All of the above is backed by engineering and quality assurance.


Check our material specifications against other manufacturers and suppliers. Those listed above meet or, in most cases, exceed those typically found in the waterwell, mining, or construction industries.


Material traceability insures that the materials are of the correct chemistry and heat treatment. This is not only important to the integrity of the drill rod but especially important for the friction weld process to be completed successfully.




Check our material specifications against other manufacturers and suppliers. Those listed above meet or, in most cases, exceed those typically found in the waterwell, mining, or construction industries.


Our engineering department insures that the materials are of the correct chemistry and heat treatment. This is not only important to the integrity of the drill rod but especially important for the inertia welding process to be completed successfully.




Most manufacturers of waterwell, mining, and construction drill pipe do not have an engineer on staff. The importance is in knowing that your purchase has the properties you desire with being technically sound. Or, good advice when there may be potential problems with a desired design.



Most manufacturers in the China do not have an active quality program. We like to refer to these as a “passive” quality program. A “passive” program waits for a problem to appear in the field and tries to determine if it is a one time event or a procedural or material problem. This may be OK, unless you are the one that has the problem.


An “active” quality program utilizes material traceability, inspections, testing, and skilled employees to insure that problems do not leave the plant. Our system of inspections of materials and workmanship along with a management commitment towards quality works toward shipping products free of defects in workmanship and materials.


Not only do we have the manufacturer’s vast resources but we also offer over 10 years of experience in the drill pipe business.


We specialize in drill pipe and drill string components. We have product knowledge to help you choose the best drill pipe for your application. After all, what you ask for may not be what you need. We ask the necessary questions to determine that your purchase is the best for your application.


We are very familiar with the various drill rig make and models along with the correct drill pipe design required to run on those rigs.



By purchasing your drill pipe from Unitesteel, you can be assured that you receive a product that has been engineered for your application and manufactured with quality – a product that is a notch above the rest.


OK. So how much will these extra features cost? We believe our products are competitively priced. Email us today for a quotation.

www.gaslinepipe.com