In order to solve the key technology of ultra-deep well drilling-improving cutting efficiency and rate of penetration in marine facies complex exploration area of south China

it is required to collect outcrops of Northeast Sichuan area formation

test and analyze their rock mechanical characteristics at normal temperature and simulated downhole conditions with available apparatuses. The goal and meaning of the test and collected samples were briefly introduced. The experimental scheme

testing apparatus

samples

the results and data statistical method were stated. According to statistical results

the method for analyzing rock mechanical characteristics of deep formation and related qualitative and quantitative results acquired were presented in detail. And the rock breaking mechanism of ultra-deep well drilling was qualitatively analyzed. Research shows that by testing and analysis: the mechanical properties of the rock directly related rock breaking. Under the action of temperature and pressure factors

the deep changes in mechanical properties of rock result in rock broken of cut way to scrape more difficult in the deep strata of rock. This is the key factor of the ultra-deep drilling speed can not be greatly improved. Through this pilot study and analysis

access to a set of rocks mechanical properties under different environmental conditions. Changes in mechanical properties of the qualitative and quantitative conclusions will provide technical support for rock breaking mechanism

high-performance bit research and selection in deep and ultra deep drilling