Schlumberger Technology Corporation

Florian Risser

Patrice Ligneul

Jacques Sellin

Didier Pohl

Boris Valkov

Kamran Danaie

Kai Hsu

Gocha T Chochua

Haitao Zhang

Resonating sensors for use in high-pressure and high-temperature environments are provided. In one embodiment, an apparatus includes a sensor with a double-ended tuning fork piezoelectric resonator that includes a first tine and a second tine. These tines are spaced apart from one another so as to form a slot between the first and second tines. The width of the slot from the first tine to the second tine varies along the lengths of the first and second tines. Various other resonators, devices, systems, and methods are also disclosed.

Resonating sensor for high-pressure and high-temperature environments

Methods and apparatus for obtaining data from a density-viscosity (DV) sensor of a downhole tool, wherein the DV sensor comprises a resonating element disposed in a fluid flowing in a flowline of the downhole tool, and determining a resonance frequency and quality factor of the resonating element utilizing a nonlinear regression and/or a plurality of resonance modes exhibited by the obtained data.

Determining resonance frequency and quality factor

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Elancourt, France

Florian Risser