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 assembly

Info

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
Application number
IT8819706A
Other languages
Italian (it)
Other versions
IT8819706A0 (en
Inventor
Bruce Hawley Burr
Original Assignee
Hughets Tool Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US07/023,170 external-priority patent/US4753303A/en
Application filed by Hughets Tool Co filed Critical Hughets Tool Co
Publication of IT8819706A0 publication Critical patent/IT8819706A0/en
Application granted granted Critical
Publication of IT1216038B publication Critical patent/IT1216038B/en

Links

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.
IT8819706A 1987-03-09 1988-03-09 Earth boring bit with two piece bearing and rigid face seal assembly IT1216038B (en)

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)

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