Table of Content

20 November 1983, Volume 5 Issue 4

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论文

HERSCHEL-BULKLEY RHEOLOGICAL MODEL OF DRILLNG FLUID AND CEMENTSLURRY AND ITS APPLICATION

1983, 5(4):  1-16.  DOI: 10.3863/j.issn.1000-2634.1983.04.001

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Herschel-Bulkley rheological model has a yield-value and three parameters. It can represent the properties of the usually used Newtonian, Bingham and power-law fluids at the same time. Besides, it is widely available and accurate.
With the help of the basic rheological model, in this paper we have discussed the rheological parameters, shear thinning and the capability of lifting cuttings or drilling fluid and cement slurry, and presented some reasonable methods of calculating these rheologecal parameters. By simplifying the hydraulic parameters of the canals, we have derived quite accurate formulae of the pressure drop, shear rate and Reynolds number.

EVALUATION OF THE RHEOLOGIC MODELS OF DRILLING FLUIDS

1983, 5(4):  17-38.  DOI: 10.3863/j.issn.1000-2634.1983.04.002

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In this paper we made a theoritical analysis of commonly used rheologic models of drilling fluids. By analyzing and comparing experimental data of rotational and pipe-type viscosimeter, we have proved that Robertson-Stiff model and Casson model are comparatively perfect in theory and avaelable widely and that Bingham model and power law model are available only for some drilling fluids in certain conditions.

MEASREMENT OF THE WORKING TEMPERATURE OF JOURNAL BEARINGS OF THE ROCK BIT

Yang shi-liang Chen fang-xun

1983, 5(4):  39-51.  DOI: 10.3863/j.issn.1000-2634.1983.04.003

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In order to deal with the working temperature of journal bearings of the rock bit, we made a lot of experiments on the test band. They were performed with full-sized bit under analogous bottom hole conditions. We measured the maximal temperatures of the bearing system under different conditions, and analyzed the relationship between temperature increasement and various drilling parameters. Maybe, the results are useful in improving bearing structures, selecting materials and etc.

THE SOLUTION TO THE PROBLEM OF GRIFFITH CRACK MODE BY THE METHODOF MELLIN TRANSFORM

Yang Zhou

1983, 5(4):  52-67.  DOI: 10.3863/j.issn.1000-2634.1983.04.004

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In this thesis the Mellin Transform Method is used to solve the problem of Griffith Crack Mode I. In the course of solution the Cauchy Integral and complex function method are used and correct results are obtained. These results are agreeable to those got by other methods.

OPTIMIZED DESIGN OF BOTTOM-HOLE PRESSURE FIELD CLASSIFICATION IN JET DRILLING

Yao Hen-shen Zhang Chun-yin Liao Rong-qing

1983, 5(4):  68-74.  DOI: 10.3863/j.issn.1000-2634.1983.04.005

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A scientific classification of the test data obtained proves to be of primary importance for the study of bottom-hole fluid pressure fields. In this article using quite simple mathematical methods we classified bottom-hole pressure fields optimally, worked out some computer programs and presented their application examples.

REALIZATION OF OUTPUT OF CHINESE CHARACTERS IN FORTRANON CS-3 COMPUTER EQUIPPED WITH HANBASIC

Wang Da-ming

1983, 5(4):  75-95.  DOI: 10.3863/j.issn.1000-2634.1983.04.006

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This paper is concerned with the principles and processes of realization of output of Chinese characters on CS-3 computer. Then it deals with the specialties of output of Chinese characters in FORTRAN and introduces specific transplanting methods, presenting some flow charts and source programs. At the end of the paper it is shown how to use these programs.