Increasing Casing Collapse Resistance Against Salt-Induced Loads

1985 ◽  
Author(s):  
F. Khalaf
Keyword(s):  
Collapse Resistance ◽  
Casing Collapse

On Some Factors Affecting Casing Collapse Resistance under External Pressure

2020 ◽  
Author(s):  
Bisen Lin ◽  
David Coe ◽  
Richard Harris ◽  
Timothy Thomas
Keyword(s):  
External Pressure ◽  
Factors Affecting ◽  
Collapse Resistance ◽  
Casing Collapse

Analysis on the Influence Factors of Casing Collapse Resistance Strength

2011 ◽  
Vol 415-417 ◽  
pp. 2121-2125 ◽  
Author(s):  
Qi Lou ◽  
Wei Du ◽  
Xin Li Han ◽  
Dong Feng Li ◽  
Guang Lu Zhang
Keyword(s):  
Residual Stress ◽  
Yield Strength ◽  
Material Properties ◽  
Influence Factors ◽  
Full Scale ◽  
Test Results ◽  
Resistance Property ◽  
Collapse Resistance ◽  
Strength Based ◽  
Casing Collapse

Casing collapse resistance strength is an important parameter for its properties in using. Specification, geometry accuracy, material properties, and many other reasons can influence casing collapse resistance property. Study each factors influence for casing collapse resistance strength based on full scale collapse test results of seventeen Φ177.80mm casings and there geometry and material properties test results. The results show that casing collapse resistance strength was influenced by geometry accuracy, yield strength and residual stress together. Ovality greater than 0.5% and fluctuated more than 0.5%, or eccentricity more than 10%, casing collapse resistance strength will be reduced obviously. Casing with excellent collapse resistance strength will be produced through making yield strength in appropriate level, controlling the geometry accuracy and reducing residual stress.

HPHT Gas Well Cementing Complications and its Effect on Casing Collapse Resistance

2012 ◽  
Author(s):  
Zhaoguang Yuan ◽  
Jerome Schubert ◽  
Catalin Teodoriu ◽  
Paolo Gardoni
Keyword(s):  
Gas Well ◽  
Collapse Resistance ◽  
Casing Collapse

Effect of Nonuniform Loading on Conventional Casing Collapse Resistance

2004 ◽  
Vol 19 (03) ◽  
pp. 156-163 ◽  
Author(s):  
P.D. Pattillo ◽  
N.C. Last ◽  
W.T. Asbill
Keyword(s):  
Collapse Resistance ◽  
Nonuniform Loading ◽  
Casing Collapse

Effect of Nonuniform Loading on Conventional Casing Collapse Resistance

2003 ◽  
Author(s):  
P.D. Pattillo ◽  
N.C. Last ◽  
W.T. Asbill
Keyword(s):  
Collapse Resistance ◽  
Nonuniform Loading ◽  
Casing Collapse

Equations to Calculate Casing Collapse Strength Under Nonuniform Load Based on New ISO Model

2016 ◽  
Vol 138 (5) ◽  
Author(s):  
Kuanhai Deng ◽  
Yuanhua Lin ◽  
Wanying Liu ◽  
Dezhi Zeng ◽  
Yongxing Sun ◽  
...  
Keyword(s):  
Full Account ◽  
Manufacturing Defects ◽  
Iso Standards ◽  
Failure Data ◽  
Collapse Resistance ◽  
Collapse Model ◽  
Collapse Models ◽  
Nonuniform Load ◽  
Calculation Results ◽  
Casing Collapse

Many studies focused on casing collapse resistance under uniform load have been done, and API 5C3 and ISO standards have been formed. However, the collapse models presented by API 5C3 and ISO standards are not suitable for calculating and predicting the casing collapse resistance under nonuniform load (NUL), despite it is well known that the NUL has a significant impact on the casing collapse resistance. Hence, based on the elastic theory and new ISO collapse model, the conception of advance coefficient of plastic collapse of casing under NUL is put forward, and the new equations to compute casing collapse resistance under NUL are established, which takes into full account the effect of manufacturing defects (such as ovality and eccentricity) and residual stress on the casing collapse resistance. The influence rule of nonuniform coefficient of load (NCL) on casing collapse resistance has been analyzed. Numerical and experimental comparisons show that the calculation results (CR) of new equations are much closer to the real failure data than the current equations proposed by Han and EI-Sayed (1992, “Resistance of Cemented Concentric Casing Strings Under Nonuniform Loading,” SPE Drill. Eng., 7(1), pp. 59–64). Research results can provide an important theoretical reference for casing design in complicated stratum (such as plastic creep and dipping stratum).

Comparison of steel frames with RWS and WFP beam-to-column connections through seismic fragility analysis

2020 ◽  
pp. 136943322097728
Author(s):  
Haoran Yu ◽  
Weibin Li
Keyword(s):  
Limit State ◽  
Pushover Analysis ◽  
Steel Frames ◽  
Fragility Analysis ◽  
Structural Safety ◽  
Seismic Fragility ◽  
Fe Modelling ◽  
Collapse Resistance ◽  
Seismic Collapse ◽  
Probabilistic Seismic Demand

Reduced web section (RWS) connections and welded flange plate (WFP) connections can both effectively improve the seismic performance of a structure by moving plastic hinges to a predetermined location away from the column face. In this paper, two kinds of steel frames—with RWS connections and WFP connections—as well as different frames with welded unreinforced flange connections were studied through seismic fragility analysis. The numerical simulation was conducted by using multiscale FE modelling. Based on the incremental dynamic analysis and pushover analysis methods, probabilistic seismic demand analysis and seismic capability analysis were carried out, respectively. Finally, combined with the above analysis results, probabilistic seismic fragility analysis was conducted on the frame models. The results showed that the RWS connection and WFP connection (without double plates) have little influence on reducing the maximum inter-storey drift ratio under earthquake action. RWS connections slightly reduce the seismic capability in non-collapse stages and improve the seismic collapse resistance of a structure, which exhibits good structural ductility. WFP connections can comprehensively improve the seismic capability of a structure, but the seismic collapse resistance is worse than that of RWS connections when the structure has a large number of storeys. The frame with WFP connections has a lower failure probability at every seismic limit state, while the frame with RWS connections sacrifices some of its structural safety in non-collapse stages to reduce the collapse probability.

scholarly journals Study on progressive collapse resistance of single-layer reticulated shells

2021 ◽  
Vol 1777 (1) ◽  
pp. 012037
Author(s):  
R Han ◽  
T Y Yin ◽  
X D Yang ◽  
Y Zhang ◽  
Y S Zhang ◽  
...  
Keyword(s):  
Progressive Collapse ◽  
Single Layer ◽  
Collapse Resistance

Progressive collapse resistance of framed buildings with partially encased composite beams

2021 ◽  
Vol 38 ◽  
pp. 102228
Author(s):  
Gianrocco Mucedero ◽  
Emanuele Brunesi ◽  
Fulvio Parisi
Keyword(s):  
Progressive Collapse ◽  
Composite Beams ◽  
Collapse Resistance
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