Double-shouldered tool joints increase torsional strength
Drillpipe can now be furnished with patented double-shoulder tool joints that have a much greater torsional strength than conventional or API tool joints. The increased torsional strength adds versatility in drillpipe selection, longer tool joint life, more efficient drilling, and greater reliability. The double-shoulder tool joints are available in the same sizes and same OD and ID combinations as conventional rotary shouldered connectors, and they have the same thread form as their API counterpart. As discussed in this paper, the differences between these joints and conventional joints are the long pin base, the long pin nose, and the secondary torque shoulder on the end of the pin. This paper also compares the torsional strength of several double shoulder joints to conventional joints. The increased torsional strength of these connections can be used three different ways which are discussed.
- OSTI ID:
- 390131
- Journal Information:
- JPT, Journal of Petroleum Technology, Journal Name: JPT, Journal of Petroleum Technology Journal Issue: 6 Vol. 48; ISSN 0149-2136; ISSN JPTJAM
- Country of Publication:
- United States
- Language:
- English
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