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Mechanical loads on casing and tubing strings

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Proceedings Papers

Paper presented at the SPE Latin America and Caribbean Petroleum Engineering Conference, May 17–19, 2017
Paper Number: SPE-185522-MS
..., and the upper string all the way to the surface ( Fig. 2 ). The packer acts as a barrier element, which transmits the gunshock loads to the casing and maintains the wellbore shockwaves in the lower annulus, protecting the string above it from potential overload and preventing mechanical failure. After gun...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 21–23, 2021
Paper Number: SPE-206287-MS
... connector rod pumping performance production control field test pumping efficiency production monitoring mechanical wear rod load reducer anchor tubing string rod string artificial lift system upstream oil & gas jidong oilfield contractor flexible rod connector load reducer hydraulic...
Proceedings Papers

Paper presented at the ADIPEC, October 31–November 3, 2022
Paper Number: SPE-211576-MS
... ). Figure 6 Packer loads (tubing-to-packer forces) with packer operating limits for Upper & Lower Zones. Case Study 2: Dual-String Multilateral Water Injector The well is a dual water injector ( Figure 7 ) targeting different reservoir units in the Lower Cretaceous formation. Due...
Proceedings Papers

Paper presented at the SPE Middle East Oil & Gas Show and Conference, November 28–December 1, 2021
Paper Number: SPE-204541-MS
... of the drill string, the strength analysis of the casing string, the mechanical behavior analysis of the test string and the operation string, etc. Analysis results provided by finite element model of pipe string including: Mises Stress, Triaxial Safe factor, Axial stress, Hoop stress, Shear stress caused...
Proceedings Papers

Paper presented at the SPE Deepwater Drilling and Completions Conference, June 20–21, 2012
Paper Number: SPE-156017-MS
..., there are several sensors employed in the experimental setup. There is a dynamic load sensor placed at the attachment between the excitation mechanism and the PVC tube. This measures the axial load that is exciting the tubular string. In addition, there is a laser displacement sensor that measures the displacement...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 1995
Paper Number: OTC-7873-MS
... the loads for a casing or tubing string. A safe design can only be achieved if the designerhas confidencein the loads that are calculated and the material that is used. The mechanics of casing and tubing design requires knowledge of thres basic profiles: internal pressure, external pressure, and temperature...
Proceedings Papers

Paper presented at the SPE Russian Petroleum Technology Conference and Exhibition, October 24–26, 2016
Paper Number: SPE-182134-MS
.... 30 m of steel tube is enough to dissipate the huge amount of heat. One can see in the above diagrams that the thermal conductivity of steel of the casing string and air heat capacity enable to reduce the temperature of metal to 390°C. It takes less than 1 day to attain the steady state...
Proceedings Papers

Paper presented at the SPE/IADC Drilling Conference, February 23–25, 2005
Paper Number: SPE-92448-MS
... factor for the inner tube approached one at the maximum depth of the planned VIT completion, indicating that the inner tube was the most severely loaded string component. In the Hot Shut-in with Casing Leak load case, the design factor for the outer tube approached one at the maximum depth...
Proceedings Papers

Paper presented at the SPE Artificial Lift Conference & Exhibition-North America, October 6–8, 2014
Paper Number: SPE-171351-MS
... recommended practice, but may be used in certain circumstances to test or ensure the anchor function. Test Case Descriptions Temperature Temperature affects the length of the tubing string, but since the hydraulic anchor is not preloaded, this is not as much of a concern as it is with mechanical...
Proceedings Papers

Paper presented at the SPE Middle East Oil and Gas Show and Conference, March 18–21, 2019
Paper Number: SPE-194955-MS
..., the tubing pressure is 0.38MPa; the casing pressure is 0.5MPa; and the rod string assembly is 666m*Φ22mm+723m*Φ19mm. The hole trajectory curve is shown in figure 5 . Table 1 Load Comparison of Example Wells Well No. Maximum Load Minimum Load Measured, KN Predicted, KN Error...
Proceedings Papers

Paper presented at the Fall Meeting of the Society of Petroleum Engineers of AIME, October 8–11, 1972
Paper Number: SPE-4088-MS
... was investigated. The tests considered conditions where collapsing forces were imposed on a bare cement sheath as well as a cement sheath surrounded by tubing. The dual tubular string collapse resistance was determined by applying hydraulic and mechanical loads to the structure. Hydraulic Collapse Tests Tests...
Proceedings Papers

Paper presented at the ADIPEC, October 31–November 3, 2022
Paper Number: SPE-211547-MS
... for variation of those cases. Tracking the failure mechanism Abstract The performance of rod pumped wells are analyzed based on routine monitoring methods of echo meter and dynamometer analysis. There are 1080 sucker rod pumps installed in various fields of Mehsana. Rod pumps fail due to rod-tubing...
Proceedings Papers

Paper presented at the SPE Health, Safety and Environment in Oil and Gas Exploration and Production Conference, November 11–14, 1991
Paper Number: SPE-23483-MS
... are calculated and compared. In these calculations, the loading conditions are assumed to be known. The conditional probabilities of failure can vary widely depending on the location of a joint in the string and its controlling mechanism of failure. The calculated reliabilities are also compared to the case...
Proceedings Papers

Paper presented at the SPE Asia Pacific Oil & Gas Conference and Exhibition, October 17–19, 2022
Paper Number: SPE-210780-MS
.... Application of the industry standard soft string torque and drag model can be used to determine the axial stress profile however this may over or underestimate the magnitude of axial stress, especially in highly tortuous ERD wells. A load case must be verified against the mechanical limit of the casing...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2015
Paper Number: OTC-25679-MS
... acid jobs. In addition, the string mechanical-analysis method was used for the staged acid jobs. Based on case studies on the different methods for mitigating string challenges, a method was selected as the primary measure for improving string safety during staged acid jobs for high-pressure wells...
Proceedings Papers

Paper presented at the SPE Deepwater Drilling and Completions Conference, September 10–11, 2014
Paper Number: SPE-170327-MS
... and use this as a proxy for the tendency of the tubing string to undergo buckling – the more compressive this average injector load, the greater tendency for the tubing to undergo buckling (and lockup). Also plotted in Figure 2 is the injector load for a case with no excitation on the downhole end...
Proceedings Papers

Paper presented at the SPE Middle East Artificial Lift Conference and Exhibition, November 28–29, 2018
Paper Number: SPE-192464-MS
..., Ecopetrol. Most of the failures in these wells are related to the contact between rod string and production tubing in high DogLegs points, up to 7.8°/100 ft, which causes two different failure mechanisms. One is the breaking of the rod string due to high contact loads, and the other is the wear on the inner...
Proceedings Papers

Paper presented at the SPE Middle East Artificial Lift Conference and Exhibition, November 28–29, 2018
Paper Number: SPE-192485-MS
... and predict premature rod string failure and tubing wear. For the same previous sample case, Fig. 6 depicts the dynamic load behavior during a complete pumping cycle, the horizontal dashed line accounting for the calculated value of the critical bending force, and the time intervals in wich rod string...
Proceedings Papers

Paper presented at the SPE Production Operations Symposium, March 13–14, 1989
Paper Number: SPE-18842-MS
... at the point of helical deformation, will in some cases, exceed the yield strength limitation of the commonly used carbon steel tubulars. With the TSL the need for large compressive landing loads is eliminated. For a detailed comparison of loads and stresses in the tubing string of our test well's . deep...
Proceedings Papers

Paper presented at the SPE Saudi Arabia Section Annual Technical Symposium and Exhibition, April 21–23, 2015
Paper Number: SPE-177977-MS
... policy specifies to complete the well with three barriers, two mechanical barriers and one hydraulic barrier. This policy applies for the inside of the string and tubing-casing annulus. The cemented casing completion string tubing-casing annulus has two mechanical barriers and one hydraulic barrier...

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