Experimental research on integrated mechanical model of PDC bit

被引:0
作者
Liang Er-guo [1 ]
Li Zi-feng [1 ]
Zou De-yong [2 ]
机构
[1] Yanshan Univ, Inst Petr Engn, Qinhuangdao 066004, Peoples R China
[2] China Univ Petr, Coll Petr Engn, Dongying 257061, Peoples R China
关键词
PDC cutter; cutting area; arc length coefficient; worn height coefficient; mechanical model;
D O I
暂无
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
The cutting tests on various rocks were carried out using PDC cutters with simulating the shape of cutter section, the worn state of cutter and the state of lapping cutting. The factors, which include cutting area, contact arc length, back rake angle, rock strength against drilling and worn height of cutter, on the forces on PDC cutter were analyzed. Under a constant cutting area, the force on cutter changes with radian coefficient by the relationship of linear, rock strength against drilling by the relationship of power function, and worn height coefficient by the relationship of exponential function. It is found that the force on PDC cutter is the minimum when back rake is about 5-10 degrees. The conceptions of radian coefficient and worn height coefficient were introduced. Based on them, the general mechanical model of PDC cutter is built. Using balance equation of force, the integrated mechanical model of PDC bit is built for force calculation, which offers theoretical basis for bit design optimization and reasonable use.
引用
收藏
页码:938 / 942
页数:5
相关论文
共 6 条
[1]  
GLOWKA D A, 1986, 15619 SPE
[2]  
[李海波 Li Haibo], 2002, [岩土力学, Rock and Soil Mechanics], V23, P329
[3]  
SINOR L A, 1998, 39306 IADCSPE
[4]  
WARREN T M, 1986, 15618 SPE
[5]  
Xu Z, 1994, J U PETROLEUM, V18, P31
[6]  
ZHAI YingHu, 1994, ACTA PETROLEI SINICA, V3, P119