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2. Grant Prideco - Wikipedia

   en.wikipedia.org/wiki/Grant_Prideco

   Grant Prideco, Inc. is a supplier of drill pipe and drill stem accessories headquartered in Houston, Texas.Since 2008, it has been a subsidiary of energy services company NOV Inc. Grant Prideco was included on the Fortune magazine top 1000 largest corporations for several years in the mid-2000s [1] [2] and through the 1990s and early 2000s was the world's largest oilfield drill pipe supplier.

3. NOV Inc. - Wikipedia

   en.wikipedia.org/wiki/NOV_Inc.

   NOV Inc., formerly National Oilwell Varco, is an American multinational corporation based in Houston, Texas.It is a worldwide provider of equipment and components used in oil and gas drilling and production operations, oilfield services, and supply chain integration services to the upstream oil and gas industry.

4. Patterson-UTI - Wikipedia

   en.wikipedia.org/wiki/Patterson-UTI

   Patterson Drilling Company was founded in 1978 by Cloyce Talbott and Glenn Patterson. [1] UTI Energy was formed in 1986 to purchase Universal Well Services, Union Supply Company, Triad Drilling Company, and International Petroleum Services Company. In 2001, Patterson Drilling acquired UTI Energy and renamed the company Patterson-UTI Energy. [3]

5. Alcoa Aluminum Alloy Drill Pipe (AADP®) Selected by ... - AOL

   www.aol.com/news/2013-01-16-alcoa-aluminum-alloy...

   Alcoa's drill pipe is composed of high-strength, aluminum alloy tube connected by a proprietary thermal joining technology, which enables conventional steel tool joints to be used with an aluminum ...

6. Drill string - Wikipedia

   en.wikipedia.org/wiki/Drill_string

   Drill pipe makes up the majority of the drill string back up to the surface. Each drill pipe comprises a long tubular section with a specified outside diameter (e.g. 3 1/2 inch, 4 inch, 5 inch, 5 1/2 inch, 5 7/8 inch, 6 5/8 inch). At each end of the drill pipe, tubular larger-diameter portions called the tool joints are located.

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8. Drill pipe - Wikipedia

   en.wikipedia.org/wiki/Drill_pipe

   Drill pipe is most often considered premium class, which is 80% remaining body wall (RBW). After inspection determines that the RBW is below 80%, the pipe is considered to be Class 2 or "yellow band" pipe. Eventually the drill pipe will be graded as scrap and marked with a red band. Drill pipe is a portion of the overall drill string.

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