IT1216038B - Earth boring bit with two piece bearing and rigid face seal assembly - Google Patents
Earth boring bit with two piece bearing and rigid face seal assemblyInfo
- Publication number
- IT1216038B IT1216038B IT8819706A IT1970688A IT1216038B IT 1216038 B IT1216038 B IT 1216038B IT 8819706 A IT8819706 A IT 8819706A IT 1970688 A IT1970688 A IT 1970688A IT 1216038 B IT1216038 B IT 1216038B
- Authority
- IT
- Italy
- Prior art keywords
- seal assembly
- rigid face
- seal
- face seal
- movement
- Prior art date
Links
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000005553 drilling Methods 0.000 abstract 1
- 239000011435 rock Substances 0.000 abstract 1
Landscapes
- Earth Drilling (AREA)
Abstract
A rigid face seal assembly in a rock bit is susceptible to pressure or volume changes when the cutter moves during drilling. The seal is improved by positioning the seal groove and seal assembly in relation to the bearing surface such that rigid face seal movement is decreased relative to axial cutter movement. The movement of the rigid face seal is about one half that of the cutter, and is achieved by making the bearing surface intermediate the radial thickness of the seal assembly groove. A threaded bearing lug is used, upon which is a threaded bearing sleeve contg. about one half of the radial thickness of the total seal groove.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/023,170 US4753303A (en) | 1983-10-17 | 1987-03-09 | Earth boring bit with two piece bearing and rigid face seal assembly |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8819706A0 IT8819706A0 (en) | 1988-03-09 |
IT1216038B true IT1216038B (en) | 1990-02-22 |
Family
ID=21813499
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT8819706A IT1216038B (en) | 1987-03-09 | 1988-03-09 | Earth boring bit with two piece bearing and rigid face seal assembly |
Country Status (3)
Country | Link |
---|---|
CA (1) | CA1292220C (en) |
IT (1) | IT1216038B (en) |
MX (1) | MX166269B (en) |
-
1988
- 1988-02-18 CA CA000559193A patent/CA1292220C/en not_active Expired - Fee Related
- 1988-03-09 IT IT8819706A patent/IT1216038B/en active
- 1988-03-09 MX MX1070188A patent/MX166269B/en unknown
Also Published As
Publication number | Publication date |
---|---|
IT8819706A0 (en) | 1988-03-09 |
CA1292220C (en) | 1991-11-19 |
MX166269B (en) | 1992-12-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19980327 |