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With a rational dynamic model established on basis of the structural features and constraining conditions of the annular plate installation and through Duhamel's integral solution of Lagrange motion equation,the impact load and dynamic response of surface casing cementing unit induc.

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In view of constant pressure outside boundary double permeability composite oil reservoir model, the variable rate question dimensionless pressure distribution Laplace solution has been studied, and the corresponding application briefly derived.

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The research indicated that the ground stress,pore pressure and the rocky Biot's elasticity coefficient play the leading role in the wellbore stability study,and the other rock mechanical parameters fol...

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Probably not. He said,"It is going to be a busy week trying to figure it out." But he mostly sounds as if he already has. He said Sheffield looks comfortable at first base, though last night he still appeared to be what he is, a veteran learning a new spot. Torre also said Matsui, though inferior to Cabrera, is still a capable left fielder.

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Field tests are carried out in some wells and experimental results are analysed to provide well selection principle for gas lift jet pump.

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But we know full well that we'd better fetch a flint than beg for lightwood, we'd better dig a well for ourselves than beg for water from others.

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This paper analyzes log responses of tight formation s and tight gas reservoirs, correlates vertical formations in a same well and lateral formations in different wells and intra-formational response as well, uses graphic calibration method, analyzes the characteristics of logging curves of tight formation s from different perspectives, and thus determines gas potential of tight formation .

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