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Ovality

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Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-151
... ABSTRACT The reel-lay method has been used extensively for the installation of subsea pipelines. Plastic deformation associated with reeling may increase the ovality of a pipe, and as a result reduce its collapse capacity. Previous studies have shown that reeling induced ovality for seamless...
Proceedings Papers

Paper presented at the The 26th International Ocean and Polar Engineering Conference, June 26–July 2, 2016
Paper Number: ISOPE-I-16-100
... Abstract API 5L X65 and API 5L X80 pipes with ovality or thickness eccentricity were evaluated to investigate the influence of ratio of diameter to thickness (D/t) on the collapse resistance using elastic-plastic finite element (FE) analyses. A parametric study was shown that the plastic...
Proceedings Papers

Paper presented at the Offshore Technology Conference Asia, March 22–25, 2016
Paper Number: OTC-26566-MS
... in Metallic Structure . OTC-26566-MS Ovality Prediction for Reel-Laid Pipeline Using Empirical Formulas T. Ngai, and B. C. Fong, McDermott International, Inc. Copyright 2016, Offshore Technology Conference This paper was prepared for presentation at the Offshore Technology Conference Asia held in Kuala...
Proceedings Papers

Paper presented at the OTC Arctic Technology Conference, December 3–5, 2012
Paper Number: OTC-23783-MS
... geometric imperfections on the local buckling response was examined. The loading conditions included internal pressure and end rotation. Mechanicalresponse parameters examined included moment-curvature, ovalization, localstrain and modal response. procedure parametric study pipe segment length...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, April 1–2, 2008
Paper Number: SPE-113669-MS
...fi SPE 113669 A Field Study of Coiled-Tubing Material Loss and Ovality J. Boles, SPE, R. Burgos, SPE, and A. Medina, SPE, Schlumberger Copyright 2008, Society of Petroleum Engineers This paper was prepared for presentation at the 2008 SPE/ICoTA Coiled Tubing and Well Intervention Conference...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, March 20–21, 2007
Paper Number: SPE-107125-MS
... Abstract Some clients of coiled tubing service companies increasingly demand inspection of the tubing immediately prior to or during field operations. There is a lack of suitable available equipment for inspection of tubing for wall thickness and ovality deficiencies, particularly where...
Journal Articles
SPE Drill & Compl 9 (02): 103–106.
Paper Number: SPE-24613-PA
Published: 01 June 1994
...Ferda Akgun; B.J. Mitchell; H-P. Huttlemaier Summary A finite-element program, ANSYS, was used to determine the change in physical dimensions of oilfield tubulars and the growth of stresses in their walls as these tubulars were run and landed into a drillhole. Ovalities and axial and tangential...
Proceedings Papers

Paper presented at the SPE Western Regional Meeting, March 23–25, 1994
Paper Number: SPE-27881-MS
... deflection society of petroleum engineers Society of Petroleum Engineers SPE 27881 The Combined Effects of Curvature, Tension, and Pressure on the Ovality and Collapse of Oilfield Tubulars Ferda Akgun, Middle East Technical U., and B.J. Mitchell, Colorado School of Mines Copyright 1994, Society...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2016
Paper Number: OTC-27202-MS
... governing potential pipe cross-section ovalization, and subsequent stress alternating and fatigue damage of pressure armor under dynamic loadings. Also presented in this paper is a procedure and technique for capturing such induced pressure armor damage in the pipe design process. It is noted...
Proceedings Papers

Paper presented at the SPE North Africa Technical Conference and Exhibition, September 14–16, 2015
Paper Number: SPE-175758-MS
... rate of obtaining valid pressure measurements and fluid samples, a proper selection of the formation tester probe geometry is essential. A series of prejob simulations using various probe types indicated that the use of oval-shaped pads provided distinctive advantages over standard probe types...
Proceedings Papers

Paper presented at the PAPG/SPE Pakistan section Annual Technical Conference, November 24–27, 2014
Paper Number: SPE-174719-MS
.... Short axis logging with positioning caliper was proposed as a solution with Advanced Formation Testing tool. oval hole evaluation Upstream Oil & Gas tight formation log analysis long axis formation testing successful formation testing breakout borehole condition borehole wall...
Proceedings Papers

Paper presented at the SPWLA 51st Annual Logging Symposium, June 19–23, 2010
Paper Number: SPWLA-2010-93360
... ABSTRACT: Probe designs for formation testing and sampling tools have evolved from the simple, round, cylindrical snorkel to new shapes and configurations. There are now elongated or oval-shaped probes, as well as probes with a focusing ring and an oval-shaped, focused probe. These new probes...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2009, October 29–31, 2009
Paper Number: ISRM-EUROCK-2009-082
... Abstract Ovaling deformations develop when waves propagate perpendicular to the tunnel axis. Two closed form solutions for estimating forces and displacements due to ovaling deformations are used for engineering purposes. The present closed form solutions for predicting forces...
Proceedings Papers

Paper presented at the SPWLA 50th Annual Logging Symposium, June 21–24, 2009
Paper Number: SPWLA-2009-86800
... fluid samples are retrieved using a time-constant flow rate. Invasion time is varied from 1 to 48 hours to compare drilling and wireline sampling tools. This study quantifies mudcake sealing effectiveness, as well as the effect of borehole deviation. Oval (elongated) and focusing guard-style probes...
Proceedings Papers

Paper presented at the ISRM International Symposium on Rock Mechanics - SINOROCK 2009, May 19–22, 2009
Paper Number: ISRM-SINOROCK-2009-113
... Symposium on Rock Mechanics: Rock Characterisation, Modelling and Engineering Design Methods 1 INTRODUCTION Ovaling deformation is the most significant influence on the tunnel lining under seismic loading, except for the case of the tunnel being directly sheared by a fault (Penzien, 2000). Ovaling...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, November 11–14, 2007
Paper Number: SPE-110831-MS
..., but they have temperature, pressure, and operational limitations. The new Oval Pad* design, an elongated oval-shaped probe/pad assembly, possesses many of the advantages of dual packers without their limitations. Like a straddle packer, the Oval Pad tool is effective when testing thinly laminated and tight...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 24–27, 2006
Paper Number: SPE-102366-MS
..., and the difficulty of sealing the probes on testing tools. An Oval Pad was introduced to help overcome all of these challenges. The Oval Pad covers a vertical section of the well bore, giving it the sealing advantages of a straddle packer but still maintaining the operational flexibility of a probe. In particular...
Proceedings Papers

Paper presented at the The Eleventh International Offshore and Polar Engineering Conference, June 17–22, 2001
Paper Number: ISOPE-I-01-407
... for Including Ovalization Effects of Tubular Member on Cross-Section Properties H. Karadeniz Delft University of Technology Delft, The Netherlands ABSTRACT This paper presents the calculation of stiffness matrix of an ovalized tubular member modeled as a 3D beam element, which can be used in offshore steel...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-609
... complex variable solution boundary condition expression tunnel trough depth tunnel boundary settlement trough tunnel lining equation displacement shallow tunnel ovalization Verruijt expansion contraction coefficient circular tunnel A COMPLEX VARIABLE SOLUTION...
Journal Articles
Journal: SPE Journal
SPE J. 4 (01): 57–63.
Paper Number: SPE-55681-PA
Published: 01 March 1999
...A.S. Zheng Summary This paper presents a new modeling technique to predict collapse pressure of oval coiled tubing. Through finite element analysis, a failure mechanism for tubing collapse is identified and a collapse model proposed. This model relates the tubing collapse pressure with its yield...

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