Threaded connections which employ a metallic “thread saver” for OCTG in lieu of a thread compound are potentially valuable for the drilling industry because they offer a fast make-up process and an environmentally friendly method of making secure threaded connections without damaging threads. Using a thread saver to protect the tool joint thread is not a new idea, but new developments in materials technology combined with a better understanding of the makeup process appear to offer a new solution for compound-free drill pipe connections. The paper presents the latest tests conducted on NC38 drill pipe connections using thread savers fabricated from a CuBe alloy. Different tempers of the alloy and different thread saver surface coatings were tested. The results reported are the data from the first series of more than 60 tests that were carried out at the Technical University of Clausthal. The tests were designed to provide a characterization of the mechanical behavior of the connection process using the thread saver. Data from the tests is compared to similar data previously developed for the more-familiar processes which use thread compound. The results show the new technology is viable and may be used for heavy duty applications such as drill pipe and drill collar connections. Additionally, a short review of the thread saver history for the drilling industry is presented. Results suggest some important applications for the thread saver technology may be in riserless drilling or in scientific drilling such as the Integrated Ocean Drilling Program. A reliable “dope-less” connection technology is particularly valuable for operations where the adverse impact of environmental contamination by stray thread compounds is potentially higher than in some other operations.
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ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering
June 10–15, 2007
San Diego, California, USA
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
0-7918-4268-1
PROCEEDINGS PAPER
The Future of Environmental Riserless Drilling: Dope Free Drill Pipe Connections Using Thread Saver Technology Available to Purchase
Catalin Teodoriu,
Catalin Teodoriu
Texas A&M University, College Station, TX
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Klaus Ohla,
Klaus Ohla
Brush Wellman, Inc., Stuttgart, Germany
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William Nielsen
William Nielsen
Brush Wellman, Inc., Houston, TX
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Catalin Teodoriu
Texas A&M University, College Station, TX
Klaus Ohla
Brush Wellman, Inc., Stuttgart, Germany
William Nielsen
Brush Wellman, Inc., Houston, TX
Paper No:
OMAE2007-29459, pp. 759-767; 9 pages
Published Online:
May 20, 2009
Citation
Teodoriu, C, Ohla, K, & Nielsen, W. "The Future of Environmental Riserless Drilling: Dope Free Drill Pipe Connections Using Thread Saver Technology." Proceedings of the ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering. Volume 2: Structures, Safety and Reliability; Petroleum Technology Symposium. San Diego, California, USA. June 10–15, 2007. pp. 759-767. ASME. https://doi.org/10.1115/OMAE2007-29459
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