US3581564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for detecting roller bit bearing failure
Assignee: ExxonMobil Upstream Research Co
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Filing: 1969-05-14
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Granted: 1971-06-01
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Expires: 1989-05-14
Abstract
Abstract 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.
Inventors
- 👤 Farrile S Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:33
CPC Classifications
E; E21; E21B; E21B44/00; E21B12/00; E21B12/02; E21B45/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
67 words
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.
Claim 2
Independent Claim
67 words
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.
Claim 3
Dependent Claim
21 words
A method as recited in claim 1 including displaying also said parameter of rotary torque and said parameter of penetration rate.
Claim 4
Dependent Claim
17 words
A method as recited in claim 2 iNcluding plotting on a chart said ratio parameter psi .
Claim 5
Dependent Claim
23 words
A method as recited in claim 3 including plotting on said chart said parameter of rotary torque and said parameter of penetration rate.
Claim 6
Independent Claim
74 words
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.
Claim 7
Independent Claim
74 words
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.
Claim 8
Dependent Claim
17 words
A method as recited in claim 5 including plotting on a chart said ratio parameter psi .
Claim 9
Dependent Claim
23 words
A method as recited in claim 6 including plotting on said chart said parameter of rotary torque and said parameter of penetration rate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |