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Keywords: frequency
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Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31917-MS
... oscillates in its second torsional eigenmode (low amplitude at baseplate, high amplitude at damper element) with frequency and amplitude as high as in a real environment in the field. A heater is used to heat up the system to temperatures similar as operating temperature (up to 170 °C). The system response...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31949-MS
...Fatigue Modeler The modal stresses and the corresponding frequencies are presented in Figure-5 below. Acoustic fatigue failures are usually characterized by higher-order acoustic fluctuations which induce radial pipe deformation. Studies [ 3 ] have shown that there is a possible correlation...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-32132-MS
... automated subsea pipeline leak detection akhmetkaliyeva masuri riser corrosion frequency leakage offshore technology conference leak oil spill Introduction Due to production or installation difficulties, this involves failure, such as material defects or construction flaws (inadequate...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31706-MS
... frequency granular soil vibro driveability displacement vibratory hammer modeling & simulation dynamic driving force hammer frequency hook load driveability hammer vibratory upstream oil & gas offshore technology conference strength wall thickness installation static...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31719-MS
... tools. Local resonance within the materials creates band gap effects that increase attenuation in specific frequency ranges. The band gap region can be tuned, through selection of properties of the additive, to be in the regime of cement bond log tools. This can be particularly useful for lightweight...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31760-MS
... pipeline sustainability risk management midstream oil & gas air emission concentration cfd model carbon dioxide sustainable development social responsibility frequency co 2 database threat specialist subsea release pipeline system diameter plume loc frequency hazard consequence...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-32014-MS
... frequency mean wind speed offshore renewable irregular wave model statistics ocean energy weibull distribution amplitude significant wave height incident wave application spectrum offshore technology conference wind speed equation Introduction Offshore renewable facilities ("offshore...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31823-MS
... and estimated failure rates of mooring lines. frequency information mooring failure preemptive replacement upstream oil & gas mooring line failure rate offshore unit mooring system line failure failure event mooring integrity issue subsea system operator replacement offshore technology...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31828-MS
...Abstract Abstract Using AI-Based sound wave analysis of drilling equipment to assess its health condition and to predict equipment failure by detecting anomalous sound patterns in both time and frequency domains, and apply predictive maintenance. Machines can produce noise with frequencies...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31329-MS
.... As the run count progressed, the newly redesigned technology achieved the objectives by delivering effective friction reduction at consistent frequency and pressure drop. It soon became evident that the step change in flow rate did not affect the tool wear and tear. Since its inception the tool has set two...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31258-MS
... sloshing leads to unpredictable motion response of floating vessels that should be accounted for in the design and offloading operations of FPSO. upstream oil & gas cargo floating production storage & offloading frequency wave wire secondary peak offshore technology conference wave...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31180-MS
... against the theoretical well test volume. Experiences from the Coronavirus pandemic has brought about the new normal into well test execution. In deepwater environment, the process of well testing is more challenging and this paper aims to address these challenges and propose optimum well test frequency...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31049-MS
... power spectra using a dedicated transfer function. In coastal waters, under conditions with a weak return signal from the sea, the mean frequency related to ocean waves can occasionally not be found by the FM detector. Instead, the FM detector may lock on erroneous Doppler frequencies introduced...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31102-MS
... within complex shallow sediments. Instantaneous amplitude, phase, and frequency are the most widely used seismic attributes to indicate geological features, but those time-domain data are too limited to define an accurate subsurface model in depth. Therefore, seismic inversion is also required...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-30917-MS
... with respect to j th pipe; m: vector of M complex measurements from different receivers and frequencies, M=N rcv ×N f , where N rcv and N f are the number of receivers and frequencies, respectively; s(x): vector of M synthetic responses from forward modeling; Abstract Abstract...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31020-MS
... The ubiquitous presence of near-inertial waves in the ocean explains the high peak at the inertial frequency in current power spectra [ 3 , 4 ]). Such waves observed at any particular location can be of ‘local’ or ‘global’ or ‘remote’ origin. Since the waves can only exist in the frequency range...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31222-MS
... vibration (FIV) of control lines since lines are exposed to highly turbulent annular flows on injection wells. According to ( Nardi, 2018 ), Reynolds numbers in the order of 10 5 can be expected. Vibration effects can be more severe if flow characteristical frequency matches the natural frequencies...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2020
Paper Number: OTC-30690-MS
.... mooring system accuracy coefficient frequency model test vessel model upstream oil & gas operation estimation objective function correspond parameter value stiffness artificial intelligence marine operation high-precision data prediction forecast simulation wave direction surge...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2020
Paper Number: OTC-30718-MS
... model test safety factor viv cross-flow viv jip response curve jumper system response model frequency guidance note upstream oil & gas assessment API Recommended Practice 17R ( 2015 ), Recommended Practice for Flowline Connectors and Jumpers , American Petroleum Institute...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2020
Paper Number: OTC-30737-MS
... of multiple text-mining techniques. The techniques include: term frequency-inverse document frequency (TF-IDF), clustering, association rules, term matrix creation, and lexicon development for pre-processing text. In isolation these techniques have shown to be effective in non-industrial pursuits...

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