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Machine translation
1. (WO1980001832) PRESSURE SHAFT SEAL AND METHOD
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/001832    International Application No.:    PCT/US1980/000222
Publication Date: 04.09.1980 International Filing Date: 19.02.1980
IPC:
E21B 10/22 (2006.01), F16J 15/32 (2006.01)
Applicants:
Inventors:
Priority Data:
15597 27.02.1979 US
Title (EN) PRESSURE SHAFT SEAL AND METHOD
(FR) PRESSE ETOUPE ET METHODE
Abstract: front page image
(EN)A shaft seal (10) and method, for use, for example, with a rotary drill bit in the oil patch industry, including an annular metal ring (12), an annular elastomeric body (14) and a polytetrafluoroethylene liner (16). The seal (10) has an axially inwarly extending lubricant lip (18) and an axially outwardly extending mud lip (20). When the pressure of the lubricant exceeds a particular value for which the seal is designed (for example, in the range of 100-200 psi), the pressure causes the lubricant lip (18) to reverse direction and allow lubricant to be purged and flow axially outwardly past both lips, until its pressure is reduced after which the lubricant lip (18) returns (flips back) to its original position. During purging, the mud lip (20) acts as a restricted opening controlling purging and excluding drilling mud.
(FR)Presse etoupe (10) et methode, utilises, par exemple, avec un trepan de forage rotatif dans l"industrie du petrole, comprenant une bague metallique annulaire (12), un corps elastomere annulaire (14) et une garniture en polytetrafluorethylene (16). Le joint (10) possede une levre lubrifiante s"etendant axialement vers l"interieur (18) et une levre a boue s"etendant axialement vers l"exterieur (20). Lorsque la pression du lubrifiant depasse une valeur donnee pour laquelle le joint a ete concu (par exemple de l"ordre de 100 a 200 psi), la pression provoque l"inversion du sens de la levre lubrifiante (18) et permet la vidange du lubrifiant, celui-ci s"ecoulant axialement vers l"exterieur au-dela des deux levres jusqu"a ce que sa pression soit reduite, apres quoi la levre lubrifiante (18) reprend sa position d"origine. Pendant la purge, la levre de boue (20) joue le role d"un etranglement controlant la purge et empechant l"acces de la boue de forage.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)