专利检索 ap:("SCHLUMBERGER TECHNOLOGY BV" OR "SCHLUMBERGER HOLDINGS" OR "PRAD RES & DEV LTD" OR "SERVICES PETROLIERS SCHLUMBERGER (SPS)") AND inv:"RUSTAD ROLF" 第 1 页

1.

发明公开
PRE-STRESSED GAMMA DENSITOMETER WINDOW AND METHOD OF FABRICATION 审中-公开

公开(公告)号：EP2507828A4

公开(公告)日：2017-11-01

申请号：EP10835067

申请日：2010-12-01

申请人： SCHLUMBERGER TECHNOLOGY BV , SCHLUMBERGER HOLDINGS , PRAD RES & DEV LTD , SERVICES PETROLIERS SCHLUMBERGER (SPS)

发明人： RUSTAD ROLF , BRATLAND PAAL , NOEL JEAN-FRANÇOIS

IPC分类号： H01L23/06 , G01F1/74 , G01N23/083 , G01N23/12 , H01L23/10 , H01P1/08

CPC分类号： G01N23/12 , G01F1/74 , G01N23/083 , G01N2223/04 , G01N2223/317 , H01P1/08 , Y10T29/49865

摘要： A gamma densitometer window comprises a plate of non-metallic, preferably gamma transparent, material. The window further comprises a metallic frame member fitted around the outer edge of the plate and adapted to pre-load the plate with a compressive stress that is sufficiently high such that the sum of the compressive stress, tensile stress and shear stress components generated in the plate under high-pressure conditions is always compressive. The window is fabricated by shrink fitting the metallic frame member around the outer edge of the plate at a shrink-fit temperature such that the metallic frame member applies a compressive stress to the plate at any temperature below the shrink-fit temperature.