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Keywords: taper
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Proceedings Papers

Paper presented at the SPE/IADC Drilling Conference and Exhibition, March 14–16, 2017
Paper Number: SPE-184671-MS
... accomplished by starting at the gauge point pitch diameter and making an adjustment based on the thread height and the root truncation of the threads in order to have a diameter measurement at the root of the threads instead of the pitch diameter. The diameter is then reduced to account for the taper of the...
Proceedings Papers

Paper presented at the IADC/SPE Drilling Conference and Exhibition, March 4–6, 2014
Paper Number: SPE-167918-MS
... Landing String joint. casing design Upstream Oil & Gas resistance drill pipe selection landing string taper physical test drilling operation strength elevator innovative heavy landing system axial load pipe test unit society of petroleum engineers international association of...
Proceedings Papers

Paper presented at the SPE/IADC Drilling Conference and Exhibition, March 1–3, 2011
Paper Number: SPE-139910-MS
... Figure 8 Section from first cracked tool joint. Figure 9 Section from second cracked tool joint. Figure 10 Weld nugget microstructure in second tool joint. Figure 11 Crack at base of first tool joint taper. Figure 12 Crack at base of second tool joint...
Proceedings Papers

Paper presented at the IADC/SPE Drilling Conference, March 4–6, 2008
Paper Number: SPE-112105-MS
... selection taper torque fatigue life stress level drillstring design REG connection BSR fatigue performance connection type IADC/SPE 112105 Connection Fatigue Index (CFI): An Engineered Solution for Connection Selection and a Replacement for BSR Sean Ellis, SPE, Thomas Wadsworth, SPE, Dr. Kang...
Proceedings Papers

Paper presented at the SPE/IADC Drilling Conference, February 20–22, 2007
Paper Number: SPE-105866-MS
... exploit more remote hydrocarbon target zones. The third generation double-shoulder connection presented in this paper represents one advancement that addresses some of the drilling challenges ahead. double-start thread Jellison DSC API connection Upstream Oil & Gas drill pipe size taper...
Proceedings Papers

Paper presented at the IADC/SPE Drilling Conference, March 12–15, 1996
Paper Number: SPE-35036-MS
... conditions even further. Recent work has been done to improve the fatigue life of drill pipe by making drill pipe with longer internal taper upsets and stress relief grooves. Even though improvements have been made, slip damage still takes its toll on drill pipe. This paper addresses the failures caused by...
Proceedings Papers

Paper presented at the IADC/SPE Drilling Conference, February 18–21, 1992
Paper Number: SPE-23842-MS
... presented in the API Recommended Practice RP7G. Practice RP7G. However, increasing concern over the repeated occurrences of fatigue failure in the upset taper portion of the tube has prompted several organizations to conduct field evaluations into the frequency of failures at the internal upset location...
Proceedings Papers

Paper presented at the IADC/SPE Drilling Conference, February 18–21, 1992
Paper Number: SPE-23843-MS
... bending stress pipe is the amplitude of cyclic bending stress that is seen for each revolution. None of the stress values given take into account any changes in pipe wall geometry or any local erosive, corrosive, or mechanical damage to the tube. P. 27 stress value taper specification...
Proceedings Papers

Paper presented at the IADC/SPE Drilling Conference, February 27–March 2, 1990
Paper Number: SPE-19961-MS
... threads. A similar improvement over the NC thread form has recently been developed. This thread form has a 0.057" (1.45 mm) root radius for a further reduction in the stress concentration factor and a change in the pin taper to provide nearly equal loading of the threads along the length of the pin. On...

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