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The safety of the horizontal well casing into theoretical research

Author: QuYongZhe
Tutor: LiYueQin
School: Southwest Petroleum University
Course: Mechanical Design and Theory
Keywords: Horizontal wells Casing Mechanical model ANSYS Software
CLC: TE931.2
Type: Master's thesis
Year: 2009
Downloads: 337
Quote: 1
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Abstract


Casing string through the curved section and the horizontal section of horizontal wells by more complex , there will be impossible some of the problems encountered in the vertical well section . Borehole casing string bending close under borehole wall , may be down into the casing rigidity much so that casing string card in the curved section of the wellbore . Into the horizontal section , the casing string will be fully fit in to go down the wall may be due to the long contact section of the casing string strata , formation of the frictional resistance of the casing string is quite large , so that the casing is blocked . Cased ago , by calculating the model to analyze the feasibility of the next into the calculation, in order to ensure the safety of the casing into the next . In this paper, we consider the special circumstances to the casing in horizontal wells infinitesimal segment of horizontal well casing stress analysis , built into the casing in horizontal wells under computational model can accurately predict the horizontal well casing down into the hook load and the friction of the casing into the process can be calculated by calculating the model . In this paper, two horizontal wells in Tarim Oilfield randomly selected as a calculation example , the error in the predicted and measured values ??of about 12% , to meet the demand for engineering applications , and to verify the correctness of the theoretical analysis and calculation methods . Use of modern simulation software ANSYS numerical analysis , the curved section of the horizontal well casing is calculated using the finite element method , using a three-dimensional solid element method to simulate the curved section of the casing unit stress and strain distribution . The horizontal well into the sleeve during the analysis can be determined by the result , the sleeve is in its material allowable stress range to ensure that the cannula down into the normal work . MATLAB development environment developed horizontal wells down into the casing of the hook load and friction prediction software , the software provides users with a simple and straightforward operation platform , into the state for the use and research casing provides a good the means of construction work on cementing a guiding role .

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CLC: > Industrial Technology > Oil and gas industry > Oil machinery and equipment and automation > Oil and gas production machinery and equipment > Wellhead and downhole equipment > Downhole equipment
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