川东地区设计套管程序为φ340、φ244、φ178、φ127。φ340套管视各井不同的需要,一般下入深度为100～300m,用以封隔地表垮塌、漏失层,并安装井口。近几年,川东钻探公司平均每年完成井31口,耗用不同尺寸套管18.7万余m,其中φ340套管占3.76～4.53％,年用量约7000～8000m,价值420万元以上。自1988年以来,公司努力促进石油管材国产化 The design of casing in eastern Sichuan is φ340, φ244, φ178 and φ127. φ340 casing depending on the needs of different wells, generally into the depth of 100 ~ 300m, to seal the surface collapse, leakage layer, and the installation of wellhead. In recent years, Chuandong Drilling Company completed an average of 31 wells per year, consuming 18.7 million m of casing with different sizes, of which φ340 casing accounted for 3.76 to 4.53% and annual consumption of about 7000 to 8000 m, valued at over 4.2 million yuan. Since 1988, the company has endeavored to promote the localization of petroleum pipe