Patent · US Active

Washpipe assembly

US9976359B2 · kind B2 · utility

0Cited by

9References

10Claims

0Family size

Inventors

Xuejun Li · Shanghai, CN
Chen Liu · Beijing, CN
Jie Cui · San Jose, US

Key dates

Filing date	Aug 31, 2015
Grant date	May 22, 2018
Priority date	—
Expiry date	Oct 18, 2036

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B21/02
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A washpipe assembly is described for a passage of pressurized drilling fluid from a stationary first conduit member to a rotating second conduit member. The washpipe assembly comprises a lower union secured to the rotating second conduit member, an upper union secured to the stationary first conduit member, a floating seal assembly attached to the upper union, a rotating seal ring attached to the lower union, and a stationary seal ring attached to the floating seal assembly. The washpipe assembly also includes a washpipe suspended inside the upper union and the floating seal assembly through a waveform snap ring.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.