Validation of Global Riser/Wellhead Analysis Using Data from a Full-Scale Measurement Campaign

ABSTRACT: Fatigue damage predictions of risers and wellhead/casing systems due to drilling operations require predictive modeling techniques for load calculation/estimation. This work attempts to address the uncertainty as to whether the global riser analyses are overly...

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Design Verification and Validation Testing of the Stones Jumper Breakaway Joint

ABSTRACT: The design verification analysis and validation testing of an 8 inch jumper and integrated breakaway joint for the Stones subsea development located in 6,610 feet of water in the Gulf of Mexico is described. To control the jumper’s failure mode in the event of a...

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Corrosion Performance of Nickel Based Alloys in Highly Concentrated Hydrochloric Acid

ABSTRACT: Nickel alloys, especially the nickel (Ni)-chromium (Cr)-molybdenum (Mo) family, offer excellent resistance to hydrochloric acid. The objective of this paper is to study the corrosion performance of various Ni based alloys in high concentrations of HCl acids below the...

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Electrochemical Study of Acetic Acid Influence on Carbon Steel Corrosion in Sour Environment

ABSTRACT: This paper presents the results of an investigation into the effect of ppm concentrations of acetic acid on the electrochemical corrosion behavior of API 5L X65 carbon steel in a sour environment. Electrochemical techniques, Linear Polarization Resistance (LPR),...

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Collective Effects of Leakage, Temperature Changes, and Entrapped Air during Hydrostatic Testing

ABSTRACT: During hydrostatic testing of pipelines, leaks in the test section will result in a loss of test pressure, and a reduction in water temperature during the test hold time will also typically result in a pressure decrease. This paper reports an analysis of the comparative...

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ILI and NDE Characterization of Pipeline Manufacturing Flaws and Confirmation through Full-Scale Testing

ABSTRACT: Pipeline-manufacturing flaws, such as slivers, can be difficult to accurately characterize and size during in-line inspection. After discovery of longitudinal flaws of varying depth and length, full-scale burst tests and metallography were conducted to confirm the size...

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Fatigue Performance Characterization of a Manufacturing Seam Defect in High Frequency Electric Resistance Welded Pipe

ABSTRACT: The detection, characterization, and sizing of seam anomalies continues to be a challenge for both in-line and in-the-ditch inspection technologies. This paper presents a testing program developed to evaluate the fatigue performance on a planar manufacturing defect...

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Grade P110 Tubing Shredded by Downhole Detonation

ABSTRACT: A failure analysis was performed on a length of API 5CT Grade P110 tubing that failed while being used in a drilling operation. Approximately 10 feet of the tubing was shredded by axial slits, and there were collapsed zones above and below the failure. The slits were at...

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The Challenges of Coiled Tubing Failure Analysis

ABSTRACT Although coiled tubing provides many commercial advantages to oil and gas operators, the severe cyclic plastic strain experienced by it in normal operation limits its life and presents unique challenges to the failure analyst. This paper will address those challenges,...

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