Research on Horizontal Vibration of Heavy-Weight Drill Pipes in Directional Drilling

查看全文 作　　者：Jiang Wei Wang Lan Engineer, Drilling Department of Bohai Oil Corp of CNOOC, Tanggu, 300452, Tianjin Engineer, Well Testing Company of Bohai Oil Corp of CNOOC, Tanggu, 300452, Tianjin 出　　处：《China Ocean Engineering》索引1992年第7卷第4期,共12页 摘　　要：The mode of load and deformation of directional drilling string and the expression of trigonometric series of deflection equation are established by means of elastic deformation energy and of the vertical and horizontal bending. A calculation formula for natural frequency of horizontal resonance and rotational speed is derived based on the calculation method by Ritz, with which analysis is made for the cause and affecting factors of the excessive abrasion of heavy-weight drill pipe in high-angle holes so as to provide reference and basis for rational selection of drilling parameters and drilling tools in the future high-angle directional drilling. 关 键 词：directional drilling, heavy-weight DRILL pile, DRILL pipe wornout HORIZONTAL vibration, natural-frequency