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Keywords: fatigue life
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Proceedings Papers

Paper presented at the SPE/ICoTA Well Intervention Conference and Exhibition, March 21–22, 2023
Paper Number: SPE-212916-MS
... to weight ratio can be achieved whilst considering its fundamental properties including flexibility and fatigue life as well the suitability of its strength member for the application and environment. In order to achieve this static, dynamic and environmental testing has been conducted. In addition...
Proceedings Papers

Paper presented at the SPE/ICoTA Well Intervention Conference and Exhibition, March 24–25, 2020
Paper Number: SPE-199859-MS
... sufficient to grip and cut quench and tempered coiled tubing. Once BOP slips have been set on the harder pipe and a real world ‘pipe heavy’ load applied, how significantly is the fatigue life of quench and tempered coiled tubing affected? This paper will highlight the findings of some recent testing...
Proceedings Papers

Paper presented at the SPE/ICoTA Well Intervention Conference and Exhibition, March 26–27, 2019
Paper Number: SPE-194304-MS
..., including the testing options that will cover the aspects needed for that qualification. The analysis of the information allowed establishing that the potential problems of using CT in sour service include the reduction of fatigue life available and different forms of H 2 S cracking. Considering...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, March 27–28, 2018
Paper Number: SPE-189917-MS
... This paper investigates the fatigue behavior of Concentric Coiled Tubing (CCT) and specifically the influence of internal and annular pressures on fatigue life and diametral growth rate. This behavior is assessed relative to that of conventional Coiled Tubing (CT) using samples of identical material...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, March 27–28, 2018
Paper Number: SPE-189911-MS
... with operational damage were also tested in the fatigue machine to determine the remaining life of CT strings with real-life field damage. Laboratory test results show that the new technology CT grades do not only keep the large advantage observed for undamaged CT but also increase the fatigue life advantage...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, March 27–28, 2018
Paper Number: SPE-189948-MS
... to provide the authors for this work. Unfortunately, CoilPerformance does not contain the newer materials used for this testing, and thus cannot be expected to be accurate for specific tests. However, comparisons are made that show it is similar to measured results. Effect of Rotation on Fatigue Life...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, March 27–28, 2018
Paper Number: SPE-189932-MS
... program bias weld corrosion API document represent actual value Completion Installation and Operations commercially available modeling software evaluation fatigue life industry best practice Upstream Oil & Gas information conclusion storage corrosion society of petroleum engineers...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, March 21–22, 2017
Paper Number: SPE-184796-MS
... Completion Installation and Operations Corrosion Management sour environment oilfield chemistry Upstream Oil & Gas bias weld fatigue machine Corrosion Inhibition Coiled tubing operations strength field operation manufacturing technology Microstructure partial pressure CT grade fatigue life...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, March 22–23, 2016
Paper Number: SPE-179045-MS
... Abstract "Pure" fatigue failures (i.e. not started by corrosion or mechanical damage) are not common in coiled tubing strings because of the implementation of systems/models to manage the fatigue life. However, in recent years, a series of "pure" fatigue failures occurred on bias welds of high...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, March 22–23, 2016
Paper Number: SPE-179062-MS
..., improved low-cycle fatigue life can be achieved in tapered designs compared to straight wall designs of the minimum wall thickness of the tapered design. The tapered design generally has more desirable mechanical limits compared to the straight wall designs while experiencing limited reduction in friction...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, March 22–23, 2016
Paper Number: SPE-179048-MS
... during commercial operations with coiled tubing made of the new 125-ksi grade material. At the end of field use the coiled tubing was retrieved for laboratory testing and evaluation. Residual and total fatigue life, mechanical properties, ballooning, and effects of operational environments were evaluated...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, March 22–23, 2016
Paper Number: SPE-179049-MS
... that has been implemented and is now being used by a significant portion of the CT industry. material model Upstream Oil & Gas fatigue model strain range bias weld model diametrical growth fatigue life stress strain range base material model fatigue test point manufacturer life...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, March 22–23, 2016
Paper Number: SPE-179078-MS
... tolerance software fatigue life safety factor Coiled tubing operations fatigue failure prediction CT string od growth prediction society of petroleum engineers Diameter Growth diametral growth graph Introduction Coiled tubing (CT) can be considered a reliable means of well intervention...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, March 22–23, 2016
Paper Number: SPE-179064-MS
... the number of fatigue tests required to develop accurate models. The dependence of fatigue life, diametrical growth, and fracture length on the remaining two non-dimentional variables, strain and normalized hoop stress, are shown graphically. The lessons learned in this program are used to make...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing & Well Intervention Conference & Exhibition, March 24–25, 2015
Paper Number: SPE-173639-MS
... included static, sulfide stress cracking (SSC) and hydrogen induced cracking (HIC) testing, as well as dynamic, low-cycle fatigue testing after sour exposure. Laboratory and field testing of commercial-size strings has shown the fatigue life of the new CT grades exceeds the fatigue life of currently...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing & Well Intervention Conference & Exhibition, March 24–25, 2015
Paper Number: SPE-173661-MS
... with a low flash point and high vapor pressure. Recirculation of sour crude will lead to double-sided exposure of the coiled tubing, which historically has resulted in extremely short fatigue life. The use of active fluid property testing, in addition to scavengers and inhibitors with defined mitigation...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, March 25–26, 2014
Paper Number: SPE-168247-MS
...), Simulate hydraulics to predict circulation pressure, and determine the benefit of using fluid friction reducer (chemical costs vs. CT fatigue life savings). The image below illustrates the predicted fatigue life vs. circulation pressure, which is taken into account during this step. Fluid...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing & Well Intervention Conference & Exhibition, March 26–27, 2013
Paper Number: SPE-163892-MS
... frequently manifest in bias welds present in certain portions of the coiled tubing string, affecting both fatigue life and potentially operational safety. It has long been understood that higher wall thicknesses improve the fatigue performance of coiled tubing, including bias welds. However, higher wall...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing & Well Intervention Conference & Exhibition, March 26–27, 2013
Paper Number: SPE-163940-MS
.... curvature diameter pipe failure mechanism reel Upstream Oil & Gas pipe performance CT pipe fatigue life Completion Installation and Operations spe 163940 pipe dynamic condition internal pressure Coiled tubing operations field failure hoop stress severe dynamic condition fatigue test...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing & Well Intervention Conference & Exhibition, March 26–27, 2013
Paper Number: SPE-163945-MS
... to defects can be isolated and tracked, leading to an improved evaluation of the CT string’s condition and future serviceability. In conjunction with the theoretical fatigue life tracking, a new pipe Degradation Parameter is used to improve the management of aging coiled tubing. The state-of-the-art...

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