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Keywords: discontinuity
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Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31949-MS
... discontinuities is performed, and frequencies are screened at levels nearly up to 2700Hz. The maximum modal stresses are taken at the elements for each mode, and the total stress cycles are counted to estimate the fatigue damage. A damage sum of unity is then used as the basis for calculating the acoustic fatigue...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31102-MS
... from the Hilbert transform and inversion modeling results (acoustic impedance and modeling uncertainty) were integrated to define better geological horizons and discontinuities. The results show the integrated geophysical subsurface models can support seismic interpretation and improve shallow marine...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29642-MS
... was written that performs data quality checks and corrections on the time series data before statistics are computed. Various types of errors that typically occur in a time series include noise, flat-lined data, clipped data, outliers, and discontinuities. Statistical procedures were developed to check...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-28850-MS
... period pipeline probability discontinuity Barton , N.R. and V. Choubey , 1977 , "The Shear Strength of Rock Joints in Theory and Practice" , Rock Mechanics , Vol. 10 , No. 1-2 , pp. 1 - 54 . D’Appolonia , 1994 , "ARCAM - D’Appolonia Rockfall Simulation Program...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-28747-MS
... life discontinuity procedure sn curve reducer fatigue damage offshore technology conference transfer function frequency piping simulation spectrum stress range pressure fluctuation spectrum Abstract Piping systems having flow discontinuities like bends, tees, reducers and valves can...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 2014
Paper Number: OTC-25285-MS
... applied to understand discontinuities, at multiple scales, and spectral decomposition analysis was performed to better understand the distribution of seafloor and subsurface lithologies. The combined effect of the application of these processing and analysis steps lead to a better understanding...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2001
Paper Number: OTC-13151-MS
... that in addition to uncertainty prediction, the algorithm can also be used to statistically reduce the sharp discontinuities common in multiphase flow modeling, thus leading to improved simulation convergeance. Introduction Flow assurance and risk assessment are major issues in the offshore petroleum industry...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 1999
Paper Number: OTC-11055-MS
..., the seismic interpreter has to use his or her interpretive license in order to interpret or deduce the geometry and expression of various geologic features, such as faults and stratigraphic discontinuities. The standard 3-D seismic volume certainly shows seismic disturbances where large-displacement faults...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 1997
Paper Number: OTC-8469-MS
... be present in the as installed condition. Results of the initial findings are shown in Table 1. Although visual examinations of the affected X-brace connections using a ROV performed immediately after installing the jacket confirmed the absence of gross discontinuities, it was realized that this type...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 1996
Paper Number: OTC-8001-MS
... data to constrain the depth and configuration of a subsurface density discontinuity in a 3-D gravity modeling. The results of the seismically constrained gravity interpretation are in good agreement with seismic results, and the misfit of the predicted gravity field to the observed does not increase...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 1993
Paper Number: OTC-7281-MS
... on lower-bound S-N curves, usually the lower 95 percent confidence limit (assuming 10gN is normally distributed). The large variance in 10gN is primarily due to variance in the weld geometry and weld discontinuities. This inherently large variance makes it difficult to distinguish the secondary effects...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 1991
Paper Number: OTC-6656-MS
... positioning the member and holding it temporarily in place, a simple shutter is built up around each assembly surrounding the ring and a portion of the chord and brace. fatigue behaviour offshore technology conference mechanical creep redistribution rupture resin creep discontinuity resin...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 1989
Paper Number: OTC-5986-MS
... discontinuities in ferromagnetic materials or used to confirm defects found by other systems. An on-line computer is used in conjunction with Magfoils to bring new levels of quality control and analysis into magnetic particle inspections. Non photographic permanent magnetic images are recorded at the worksite...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 1981
Paper Number: OTC-4036-MS
... discontinuity upstream oil & gas hydraulic fracturing drilling unit OTC 4036 FABRICATION AND SERVICEABILITY OF OFFSHORE STRUCTURES by Irving L. Stern and Bruno L. Alia, American Bureau of Shipping ©Copyright 1981 Offshore Technology Conference This paper was presented at the 13th Annual OTC In Houston...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 7–10, 1978
Paper Number: OTC-3084-MS
... ABSTRACT A spherical submarine hull element is analyzed by means of a nonlinear finite-difference program. The imperfection sensitivity of this stiffened shell is greatly dampened by the structural discontinuities introduced through the stiffened portholes. The influence of shape imperfection...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 1977
Paper Number: OTC-2866-MS
... for the fast, accurate detection and location of discontinuities in subsea structures. INTRODUCTION With the increasing construction and usage of offshore platforms has come the ever increasing need for verification of structural integrity. The ap- plication of standard nondestructive testing tech- niques...

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