Schlumberger Technology Corporation

Adil Busaidy

Christian Stoller

Tong Zhou

Jeffrey Miles

David Rose

Richard J Radtke

Lawrence A Behrmann

Kenneth R Goodman

Harvey Williams

Andrew J Martin

Carlos Erik Baumann

Karim Al Sayed

Pascal Millot

Fokko Harm Cornelis Doombosch

A presence of cement may be identified based on a downhole tool that may emit neutrons into a wellbore having at least one cement casing. The neutrons may interact with the particular material via inelastic scattering, inelastic neutron reactions, capture of neutrons and/or neutron activation through one of these reactions and cause a material to emit an energy spectrum of gamma rays, and wherein the downhole tool is configured to detect an energy spectrum of the gamma rays that is specific to at least one of a plurality of elements and associated a region within the wellbore. An amount of elements, such as calcium and silicon, may be determined from the gamma ray spectra that may indicate a present of cement within the wellbore.

Systems and methods for determining the presence of cement behind at least one casing using spectroscopy measurement

An assembly for minimizing damaging effects of pressure waves on devices in a wellbore. The assembly comprises a dynamic device disposed in the wellbore and generating pressure waves during actuation; a barrier device disposed in the wellbore and presenting an obstacle to the pressure waves generated by the dynamic device; and an occlusion disposed in the wellbore between the dynamic device and the barrier device which reduces the damaging effects of the pressure waves on the barrier device.

Assemblies and methods for minimizing pressure-wave damage

Growing community of inventors

Kuala Lumpur, Malaysia

Adil Busaidy