An Experimental Study on the Pressure Distribution in Horizontal Gas Wells

The paper presents a review of analytical and experimental work which has been done on flows in rotating ducts. It presents the results of an experimental study to measure the secondary flows predicted by the previous analytical work. A duct of approximately 3 ft in length with a cross section of 2 × 5 in. was rotated up to speeds of 300 rpm. Air was used as the working fluid. Static pressures, total pressures, and yaw angles were measured at selected points along the channel. The flow regime examined was the developing flow from the entrance to the exit of the channel. Examination of the data revealed the presence of two longitudinal vortices which extended the length of the channel. Pressure distribution across the height of the channel and across the width of the channel was obtained. The magnitude of the cross-flow velocities in the channel were determined and mapped. It was found that the data for various rotational speeds could be collapsed upon a single curve by dividing all data by the rotational speeds. The results of the experimental study provide solid verification for the hypothesis of longitudinal vortices in rotating ducts.

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WIND PRESSURE DISTRIBUTION ON LOW-RISE BUILDINGS WITH CYLINDRICAL ROOFS

Proceedings of International Structural Engineering and Construction ◽

10.14455/isec.res.2015.193 ◽

2015 ◽

Vol 2 (1) ◽

Author(s):

Astha Verma ◽

Ashok Kumar Ahuja

Keyword(s):

Boundary Layer ◽

Experimental Study ◽

Wind Tunnel ◽

Pressure Distribution ◽

Open Circuit ◽

Wind Pressure ◽

Wind Loads ◽

Wind Loading ◽

Pressure Coefficients ◽

Available Information

Wind is one of the important loads to be considered while designing the roofs of low-rise buildings. The structural designers refer to relevant code of practices of various countries dealing with wind loads while designing building roofs. However, available information regarding wind pressure coefficients on cylindrical roofs is limited to single span only. Information about wind pressure coefficients on multi-span cylindrical roofs is not available in standards on wind loads. Present paper describes the details of the experimental study carried out on the models of low-rise buildings with multi-span cylindrical roofs in an open circuit boundary layer wind tunnel. Wind pressure values are measured at many pressure points made on roof surface of the rigid models under varying wind incidence angles. Two cases namely, single-span and two-span are considered. The experimental results are presented in the form of contours of mean wind pressure coefficients. Results presented in the paper are of great use for the structural designers while designing buildings with cylindrical roofs. These values can also be used by the experts responsible for revising wind loading codes from time to time.

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Experimental study of alcoholic retarded acid systems for high temperature gas wells acidizing process

Chemical Engineering Research and Design ◽

10.1016/j.cherd.2014.06.003 ◽

2015 ◽

Vol 93 ◽

pp. 576-583 ◽

Cited By ~ 4

Author(s):

P. Fayzi ◽

A. Mirvakili ◽

M.R. Rahimpour ◽

M. Farsi ◽

A. Jahanmiri

Keyword(s):

Experimental Study ◽

High Temperature ◽

Gas Wells ◽

High Temperature Gas

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Experimental Study on Sand-Carrying Mechanism and Capacity Evaluation in Water-Producing Gas Wells and Its Application in Artificial Lift Optimization

10.2118/173700-ms ◽

2014 ◽

Author(s):

Changyin Dong ◽

Yanlong Li ◽

Qinghua Zhang ◽

Shengli Feng ◽

Lihui Zhang

Keyword(s):

Experimental Study ◽

Gas Wells ◽

Artificial Lift ◽

Capacity Evaluation

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A New Artificial Lifting Technology for Gas Wells-Downhole Gas Compression

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.753-755.2689 ◽

2013 ◽

Vol 753-755 ◽

pp. 2689-2692

Author(s):

Xiang Liu ◽

Zhi Chao Qiu ◽

Chun Zhao

Keyword(s):

Experimental Study ◽

New Technology ◽

Ordos Basin ◽

Research Progress ◽

Gas Wells ◽

Liquid Loading ◽

Artificial Lift ◽

Gas Compression ◽

Effective Drainage ◽

Gas Fields

Downhole Gas Compression (DGC) is an entirely new powered artificial lift technology specifically for natural gas wells. The technology offers the opportunity to increase production by 30-50%, significantly improve reserves and delay the onset of liquid loading. Key application of DGC is for use in deeper partially depleted reservoir wells encountering liquid loading. The research progress of DGC is introduced in this paper and the results of theoretical and experimental study of DGC are investigated. Moreover, the adaptability and application prospect of this new technology is analyzed. There are many gas fields in China faced with problems about effective drainage and recovery enhancement, such as the mature gas fields in Sichuan and Ordos Basin. DGC will have a good application prospect in China and further study of the DGC technology is recommended.

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