公开(公告)号：EP2909434A1

公开(公告)日：2015-08-26

申请号：EP13893150.6

申请日：2013-09-06

申请人： Halliburton Energy Services, Inc.

发明人： GAO, Li ,  PELLETIER, Michael T. ,  ATKINSON, Robert S. ,  PERKINS, David L.

IPC分类号： E21B45/00 ,  E21B44/02 ,  E21B47/125

CPC分类号： E21B47/122 ,  E21B41/02 ,  G01N17/04 ,  G01V3/26

摘要： Methods and systems for monitoring material loss in a downhole environment arising from corrosion and/or erosion include placing a downhole sensor in a borehole. The resistance of the downhole sensor is measured using a four-probe resistance technique in which a power source is provided at two electrodes of the downhole sensor and voltage is measured at two voltage taps. A rise in voltage over time indicates loss of conductive material on the downhole sensor. The conductive material on the downhole sensor may be formed to provide discrete voltage increases for improving reliability of material loss and/or rate of material loss resistance measurements.

公开(公告)号：EP3052968A1

公开(公告)日：2016-08-10

申请号：EP13899334.0

申请日：2013-12-09

申请人： Halliburton Energy Services, Inc.

发明人： ATKINSON, Robert S. ,  PERKINS, David L. ,  PELLETIER, Michael T. ,  JONES, Christopher Michael ,  ZHANG, Wei ,  GAO, Li

IPC分类号： G01V3/26 ,  G01V13/00

CPC分类号： G01V8/12 ,  G01V3/26 ,  G01V13/00

摘要： The disclosure relates to logging sensor or tool including an electromagnetic radiation source operable to emit at least one wavelength of electromagnetic radiation, a detector operable to detect the wavelength of electromagnetic radiation, a polycrystalline transparent ceramic component transparent to the wavelength of radiation, and a flowline between the electromagnetic radiation source and the detector having at least a portion of a wall formed from the polycrystalline transparent ceramic component, the flow line operable to permit the flow of a drilling fluid. Such a sensor may be used in a logging while drilling or measuring while drilling apparatus. The also disclosure relates to a wireline measurement apparatus including a sensor comprising a polycrystalline transparent ceramic component. The disclosure further relates to a cast logging sensor or tool component comprising a polycrystalline transparent ceramic component, wherein the sensor component has a shape not obtainable from a single crystal using machining techniques.