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• W2082461366 abstract "Abstract Shell has operations in Pinedale Anticline, Wyoming. Most wells in this region are approximately 14,000 ft deep and take an average of 30 – 40 days to drill. Drilling within their 4 1/2 production tubing strings will allow deeper penetration into the production zone resulting in increased production. To reduce well cost, Shell requested Grant Prideco to qualify the 4 1/2, 13.50ppf, P110 DWC/C-SR to utilize for its production string. This paper details the specific test plan. DWC/C-SR is a thread seal connection which has been integrated with a resilient seal. Both fatigue and seal ability performances were to be verified because the connection will be used for drilling applications. Fatigue testing followed API RP7 guidelines. Seal ability testing was based on ISO 13679 qualification requirements. Finite element analysis (FEA) was performed on different ISO configurations to determine the worst-case fatigue configuration based on linearized Stress Amplification Factor (SAF) analysis. In addition, FEA was used to determine the worst-case galling configuration. Three specimens were tested at targeted stress levels to determine the connector fatigue life. Next, four specimens were fatigued to a pre-determined number of cycles at a target stress level. This was followed with ISO series B tests. In order to evaluate high temperature performance, one of the ISO Series B test was conducted at 300°F. Additionally, make/break specimens were tested to verify galling resistance. Casing drilling technology is quickly expanding into more stringent applications. However, connection performance under these severe fatigue and combined load applications is uncertain. Previously, casing drilling connection design focused on providing high torsion capacity and fatigue resistance; however, sealability characteristics should be seriously evaluated. The test program detailed in this paper evaluates connection performance for both fatigue and sealability. This information will assist in facilitating a broader application of casing drilling connections. Introduction The objective of this project was to evaluate the 4 1/2, 13.50ppf; P110 DWC/C-SR connection for Shell's casing drilling applications in the Rocky Mountains. Tests were conducted in three steps, each with distinctive goals: Step I: Functional make and break test Step II: Fatigue to failure test Step III: Post-fatigue ISO Series B with bending test Step I assessed make and break performance of the worst-case ISO configuration for galling. FEA was performed to verify the contact stress of specified ISO configurations. Various end finishes for the DWC/C-SR connection were tested. Torsion capacity was also verified. Step II determined fatigue life of the connection. FEA was used to establish the SAF of specified ISO configurations. Three specimens of the worst-case configuration, as identified by FEA, were tested to determine fatigue life. The mean and bending stresses for the fatigue testing were calculated based on expected well loads. Step III included the post-fatigue ISO Series B testing with bending. The specimens were fatigued to a predetermined number of cycles at a stress level of 5°/100ft followed by ISO 13679 Series B testing with bending. The internal pressure media for the two-quadrant ISO Series B test was gas. Four specimens were manufactured to the same ISO configuration as in Step II. Each specimen was tested to a specified service load envelope (SLE) based on actual material properties. Three specimens were tested at ambient temperature. In addition, one specimen was tested at elevated temperature. Statement of Theory and Definitions The theory of this test program is to simulate the actual working conditions of this casing drilling application. The connection was tested as it would be used in the field." @default.
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• W2082461366 date "2007-04-16" @default.
• W2082461366 modified "2023-09-27" @default.
• W2082461366 title "Casing Drilling Connection Qualification for Shell Rocky Mountain Project" @default.
• W2082461366 doi "https://doi.org/10.2118/108141-ms" @default.
• W2082461366 hasPublicationYear "2007" @default.
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