Patent · US Active

RCD sealing elements with multiple elastomer materials

US8596345B2 · kind B2 · utility

7Cited by

7References

36Claims

0Family size

Assignee

SMITH INTERNATIONAL, INC. · US

Inventors

Yanmei Li · 流花街道, CN
Alan W. Lockstedt · Palmdale, US
Sudarsanam Chellappa · Houston, US

Key dates

Filing date	Mar 24, 2011
Grant date	Dec 3, 2013
Priority date	—
Expiry date	Apr 4, 2032

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B33/085
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A sealing element for a rotating control device is disclosed, wherein the sealing element has an inner surface which forms a drillstring bore extending axially through the sealing element, an attachment end having a receiving cavity extending into the attachment end substantially parallel with the drillstring bore, a nose end opposite from the attachment end, wherein the nose end has an inner diameter smaller than the inner diameter of the attachment end, a throat region between the attachment end and the nose end, at least one soft elastomer region comprising a soft elastomer material having a hardness of 70 duro or less, and at least one stiff elastomer region comprising a stiff elastomer material having a hardness greater than 70 duro.

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