Schlumberger Technology Corporation

Kenneth Kin-nam Liang

Smaine Zeroug

Francois M Auzerais

Jacques A Jundt

Harald Quintus-Bosz

John David Rowatt

Joshua P Kinsley

Jeffrey E Thomas

Philippe F Salamitou

Alfred J Costa

Simone Musso

Ching-Hua Tseng

Julien Prosper Marc Aknin

Jonathan Andrew Bannister

Methods and apparatus for analyzing the material properties and behavior of cement as it hydrates under simulated downhole conditions. A wellbore cement simulator includes a temperature and pressure controlled innermost oil-filled container; an annulus in contact with the innermost container configured to hold a cement sample; a mesh sleeve in contact with the annulus wherein the mesh sleeve is water permeable to permit hydration of the cement sample; a steel sleeve in contact with the mesh sleeve; an elastomeric bladder surrounding the steel sleeve; and a temperature and pressure controlled outermost oil-filled container.

Wellbore cement simulator

Sensors located in the vicinity of a hydrocarbon-producing well receive power and communicate with one or more hubs located in the well or at the outer surface of a casing by means of elastodynamic waves. Each hub incorporates a plurality of transducers which permit focusing of the emitted elastodynamic waves. In order to concentrate the energy on a single sensor, or a group of sensors arranged in a cluster. Hubs and sensors communicate by exchanging, modulated elastodynamic waves. Sensors belonging to a cluster may transmit, properly time-shifted elastodynamic waves, in order to collectively focus their energy in the direction of a hub. Time synchronization between the sensors within a cluster may be accomplished by means of electromagnetic fields which travel much faster than elastodynamic waves, but can only propagate over short distances in typical formations.

Downhole sensor networks using wireless communication

Growing community of inventors

Cambridge, MA, United States of America

Kenneth Kin-nam Liang