Journal of Southwest Petroleum University(Science & Technology Edition)

SIMPLE ANALYSIS OF THE CONDITIONS OF REEF FORMING PETROLEUM IN UPPER PERMIAN CHANGXIN SERIES OF BEIBEI，SICHUAN

Zheng Yong -jian Lin Wei-cheng Wang Ting-dong

1986, 8(3): 1-11. DOI: 10.3863/j.issn.1000-2634.1986.03.001

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By analysing the conditions of reef forming petroleum in upper Per-
mian Changxin series of Beibei，it is thought that Changxin reef reservoir
rocks in West part of Eastern Sichuan mainly consist of intererystally and
eroSively porous crystalline dolomite and dolomitic reef limestone, the deve-
lopment degree of which is related to the diagenetic circumstances of reef,
The oil and gas primarily come from the Upper Permian Nongtan series, and
secondly from Changxin series, Although there is a small point-reef area
inside the platform, it is distriduted in it in groups and in complex form,
So oil forming conditions are very favorable and it is promising to contain
oil and gas, Reef distribution may be controlled by the paleostructure pro-
duced by the activities of buried basement faults,

STUDY OF WEAR MECHANISM OF HIGH-CHROMIUM CAST IRON LINER OF MUD PUMP

Pong Qi-mei Luo An-xian Qi Shu-min

1986, 8(3): 12-20. DOI: 10.3863/j.issn.1000-2634.1986.03.002

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High-chromium cast iron has been used in oil field as liner oxnud pump
ar home since lg7p}s, Its working life is much longer than single-layer
metal liner with hardening treatment, In order to lengthen the working life
of high-chromium cast iron and improve the present ,process,an analytical
study is made of doublelayer metal liner, which has been used in field and
has longer life, The metallograph analysis， the surface topography analysis
under scanning electron microscope and the wear debris analysis in field
mud are included, The result shows that the wear mechanism is that fatigue
spalling plays the main role, brittleness collapse the second role,and plastic
deformation, micro cutting and corrosion, etc, also play an important role,
From this， improvements on the existing process have been presented

MAIN一BODY DESIGN OF THE SYNTHETIC DESIGN PROGRAM FOR DRIVE SYSTEMS OF GENERAL REDUCERS

Meng Kun-liu

1986, 8(3): 21-33. DOI: 10.3863/j.issn.1000-2634.1986.03.003

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The constituents of constructional elements and the interconnection
of design for drive systems of various general reducers are analysed.The
main idea for their design sy nthesis is presented.The synthetic program
counting with computer suitable for them is made up,The adopted BASIC
source progra m has been practiced, proved and passed in IBM computer,It
can be used to design the drive systems for general reducers that consist
of involute cylinder gears,point contact helical gears，bevel gears，worm
drive a nd V-belt drive respecsively.It can still make continuous calcula-
lions of a lot of plans for the same type of reducers, It has the charac-
teristics of synthesis, elasticity, self-adjustment，practicality of higher
efficiency, wider application and simple usage

HIGH-SPEED CONVOLUTION ALGORITHM ON AGARWAL-COOLEY!NLAY

Yi Zong-fu

1986, 8(3): 34-42. DOI: 10.3863/j.issn.1000-2634.1986.03.004

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Based otl Agarwal-Cooley inlaying algorithm,.the high-speed convolu-
tion algorithm of 180 points with practical value has been designed in
this paper.The algorithm takes less time than Fast Fourier Transform
(FFT)，because it doesn't need to use trigonometic function and complex
number in operation.

METHOD OF WEIGHTED RESIDUALS FOR LIMIT ANALYSIS OF PLATES AND SHELLS

Tang Jun-cai Xiong Shu-lin Xu Bing-ye

1986, 8(3): 51-64. DOI: 10.3863/j.issn.1000-2634.1986.03.006

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On the basis of introducing the method of weighted residuals for structural limit analysis and solving some examples，we have analysed
the collapses load of combined shells，and further broadened the extent of using the method of weighted residuals in structural limit analysis.

ANALYSIS OF THE FORCE ACTING ON DRILLING STRING AND THE DEFORMATION OF !T BY THE .METHOD OF WEIG.HTEO RESIDUALS

Tang Jun-cai Dou Yi-hua

1986, 8(3): 65-71. DOI: 10.3863/j.issn.1000-2634.1986.03.007

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The method of weighted residuals is used to analyse the force acting
on drilling string and the deformation of it in this paper .T herefore，the
process of analysis and derivation has greatly been simplified, Compared
with the reference paper(2)it is proved that the Method used in this
paper is agreeable to drilling wello

ANALYSIS OF PRECISION OF SHEAR DEFORMATION THEORY OF CYLINDRICAL SHELLS

Yi Xian-zhong

1986, 8(3): 72-85. DOI: 10.3863/j.issn.1000-2634.1986.03.008

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The solution of differential equations’MWR is approached in this
paper, It is proved that the minimum of the square functional I(u) of this method is existent, Then，the shear deformation theory of cylindrical
shells is established. By using the method in examples，the precision of
the shear deformation theory of cylindrical shells is analysed(its funda-
mental relations contain five second-order partial differential equations of
two variables).The results show that the solution of differential equat-
ionsl MWR is successful，and the precision of the shear deformation
theory of cylindrical shells is satisfactory.

APPLICAT旧N OF THE WEIGHTED RESIDUALMETHOD TO BUCKLING OF LAMINATED COMPOSITE MATERIAL PLATES

Li Hui-rong

1986, 8(3): 86-92. DOI: 10.3863/j.issn.1000-2634.1986.03.009

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Based on the differential equation of the orthogonal anisotropy, the
buckling problem of plate is solved by means of the Weighted Residual
Method, and the method of determining its critical load is obtained in this
paper. In order to explain the application of this method, some examples
are given in this paper, The concept is clear, The calculation is convenient
The method is of a certain practical value.

THE METHOD 0F WEIGHTED RESIDUALS FOR COUPLE DISPLACEMENT BEAMS

Ling Jun Tang Jun-cai

1986, 8(3): 93-101. DOI: 10.3863/j.issn.1000-2634.1986.03.010

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In this paper, a polynomial or triangle function is used as a trial function.The method of weighted residuals is used to solve the def lec-lion and the slope of the couple displacement beam, Compared with those of other methods, the results obtained in this paper are high in precision.

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