Method for detecting roller bit bearing failure |
|||||||
| 申请号 | US3581564D | 申请日 | 1969-05-14 | 公开(公告)号 | US3581564A | 公开(公告)日 | 1971-06-01 |
| 申请人 | EXXON PRODUCTION RESEARCH CO; | 发明人 | YOUNG FARRILE S; | ||||
| 摘要 | A method for detecting failure of bearings in roller drill bits used in rotary drilling. Two drilling parameters-rotary torque and drilling rate-are measured and plotted with a third parameter ( psi ) equals ratio of the parameter of rotary torque divided by the parameter of drilling rate. A sharp increase in the third parameter psi indicates bearing failure. | ||||||
| 权利要求 | 1. A method for detecting roller bit bearing failure of a roller drill bit attached at the lower end of a rotatable drill pipe string when drilling boreholes through earth formations comprising: measuring and displaying the ratio parameter psi of the parameter of rotary torque in said drill string divided by the parameter of penetration rate of said drill bit through said earth formations when drilling said borehole. 2. A method as recited in claim 1 including displaying also said parameter of rotary torque and said parameter of penetration rate. 3. A method as recited in claim 2 iNcluding plotting on a chart said ratio parameter psi . 4. A method as recited in claim 3 including plotting on said chart said parameter of rotary torque and said parameter of penetration rate. 5. A method for detecting roller bit bearing failure of a roller drill bit attached at the lower end of a rotatable drill pipe string when drilling boreholes through earth formations comprising: measuring parameters of rotary torque in said drill string and penetration rate of said drill bit through said earth formations when drilling a borehole; and obtaining the ratio parameter psi of said parameter of rotary torque divided by said parameter of penetration rate. 6. A method as recited in claim 5 including plotting on a chart said ratio parameter psi . 7. A method as recited in claim 6 including plotting on said chart said parameter of rotary torque and said parameter of penetration rate. |
||||||
| 说明书全文 | |||||||
QQ群二维码
意见反馈
意见反馈