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Keywords: thread root
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Proceedings Papers

Paper presented at the IADC/SPE Drilling Conference and Exhibition, March 6–8, 2018
Paper Number: SPE-189693-MS
... design piping simulation typical location Repair Operation inspection international association of drilling contractors Upstream Oil & Gas crack surface premature connection failure operation premature failure fatigue crack pin connection repair procedure thread root blacklight...
Proceedings Papers

Paper presented at the SPE/IADC Drilling Conference and Exhibition, March 14–16, 2017
Paper Number: SPE-184680-MS
... environments. Currently, no industry standard provides quantitative analysis of the effects of pitting on the fatigue life of RSCs. This often leads to deployment of a conservative acceptance criterion of totally disallowing pitting in any thread roots in accordance with a generally accepted visual connection...
Proceedings Papers

Paper presented at the IADC/SPE Drilling Conference, March 4–6, 2008
Paper Number: SPE-112105-MS
... adopted which index the BSR range to the connection OD as shown below. Upstream Oil & Gas drill collar diameter rotary shouldered connection drill pipe selection cfi value MUT connection fatigue life stress relief feature thread root connection selection taper torque fatigue life...
Proceedings Papers

Paper presented at the IADC/SPE Drilling Conference, March 2–4, 2004
Paper Number: SPE-87191-MS
..., or both. Strain is significant because the stresses in the critical areas of the connection (thread roots and shoulder transition region) often exceed the yield strength of the material. Referring to the stress versus strain curve in Figure 1, it is evident that once the yield strength of the material...
Proceedings Papers

Paper presented at the IADC/SPE Drilling Conference, February 26–28, 2002
Paper Number: SPE-74564-MS
... stress stress distribution shoulder radius groove upstream oil & gas srg 0 counterbore iadc spe 74564 drilling equipment rotary shouldered connection tony collin thread root concentration factor stress relief groove geometry Copyright 2002, IADC/SPE Drilling Conference This paper...
Proceedings Papers

Paper presented at the IADC/SPE Drilling Conference, March 12–15, 1996
Paper Number: SPE-35033-MS
... were found. The likely locations of cracks (e.g. thread roots in box connections) are often difficult to examine. Detection and interpretation are subjective, and depend on the skill of the inspector. A crack and a surface defect may be indistinguishable. No re-viewable evidence of component inspection...
Proceedings Papers

Paper presented at the IADC/SPE Drilling Conference, February 27–March 2, 1990
Paper Number: SPE-19961-MS
... Abstract The API NC type thread form has been available on tool joints and drill collars for about 20 years. It has an advantage over the previously used (and interchangable V.065) thread form because it has a full 0.038" (0.97 mm) radius at the thread root. The full root radius has a much...

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