Schlumberger Technology Corporation

Other

Tamagawa Seiki Co., Ltd.

Tsutomu Yamate

Stephane Vannuffelen

Toru Terabayashi

Oliver Clinton Mullins

Robert J Schroeder

Kentaro Indo

Rogerio Tadeu Ramos

Akira Kamiya

Shigeru Sato

Juei Igarashi

Masahiro Kamata

Chengli Dong

Colin Allan Wilson

Michael O'Keefe

Soon Seong Chee

Hideki Kinjo

Akihito Chikenji

Raghu Madhavan

Ricardo Vasques

Albert Ballard Andrews

Shigeo Daito

Kazumasa Kanayama

Takeaki Nakayama

Les Nutt

Bikash Kumar Sinha

Li Jiang

Christopher Harrison

Peter S Hegeman

Reinhart Ciglenec

Xu Wu

Andrew L Kurkjian

Stephane Briquet

Go Fujisawa

Soraya Sofia Betancourt

Jeffrey A Tarvin

Jimmy Lawrence

Noriyuki Matsumoto

Eric Udd

Jiro Takeda

John J Ullo

Yuji Hosoda

Bruno Gayral

Khalid Ouaaba

Tsunehiko Imamura

Hidetoshi Yoshiuchi

Hiroshi Inoue

Arthur H Hartog

Manuel P Marya

Anthony Frank Veneruso

Nathan Scott Lawrence

Cosan Ayan

Steven G Villareal

Bhavani Raghuraman

Ricardo Reves Vasques

Gary Martin Oddie

Francois M Auzerais

Anthony R H Goodwin

James Edward Martin

Andrew Meredith

Ahmed Hammami

John A Kerr

Kazuhiko Matsumoto

Andrew John Carnegie

Robert Hughes Jones

John Ratulowski

Marian Faur

Theodorus Tjhang

Charles Woodburn

Yutaka Imasato

Moin Muhammad

Osamu Osawa

Colin A Wilson

Masaei Ito

Yves Barriol

Mihir S Patel

Masaki Miyashita

Michael M Toribio

Emmanuel Desroques

Laurent P Prouvost

Paul Steven Jaques

Akira Otsuka

Terry Sopkow

Hani Elshahawi

Shunsuke Yamazaki

Satoru Umemoto

Koichi Naito

Dimitri Cadere

Yukio Sudo

Veronique Nouaze

Will Wason

Stephen C Balkunas

Svein Haheim

Tatsuki Endo

Leslie Nutt

Tsutomu Sugimoto

Wei Heong Tan

Tim G J Jones

A method and a system for monitoring a condition of an elastic element used in a downhole tool are provided. The method comprises acquiring an output signal from a flexible-type sensor installed in the elastic element, the sensor sensing at least one of strain and stress of the elastic element, and estimating a condition of the elastic element based on the output signal from the sensor. The system comprises a flexible-type sensor installed in the elastic element, the sensor sensing at least one of strain and stress of the elastic element and a processor to acquire an output signal from the sensor and estimate a condition of the elastic element based on the output signal from the sensor.

Method and system for monitoring a condition of an elastic element used in a downhole tool

Certain embodiments disclosed herein are directed to devices for cooling. In certain examples, a thermoelectric device comprising a substrate and a superlattice coupled to the substrate is disclosed. In some examples, the superlattice includes a first semi-conducting material and a second semi-conducting material coupled to the first semi-conducting material to provide an interface between the first and second semi-conducting materials.

Devices for cooling and power

Oscillators that use resonator elements formed from langasite or one of its isomorphs are described herein. The resonator elements include crystal orientations that are stress and/or temperature compensated. The resonators vibrate at an oscillating frequency in a thickness-shear mode of vibration. The oscillating frequency can be used to derive temperature, derive pressure, and/or for frequency control applications.

Resonator applications for langasite and its isomorphs

A technique facilitates formation evaluation with downhole devices which may include fluid analyzers having atomic absorption spectroscopy (AAS) systems. According to an embodiment, a fluid analyzer of a downhole tool may be positioned in a wellbore penetrating a subterranean formation. The downhole tool comprises a downhole flowline for receiving a sample fluid. Additionally, the fluid analyzer comprises a flowline positioned to receive the sample fluid for analysis by the atomic absorption spectroscopy system. The atomic absorption spectroscopy system has a light source to generate light and to excite atoms of a substance in the sample fluid. The atomic absorption spectroscopy system also comprises a detector to measure how much light has been absorbed by the substance, thus enabling the atomic absorption spectroscopy analysis.

Fluid analyzer using absorption spectroscopy

An imaging-based measurement apparatus includes a light source, and at least one optical element for positioning in a flow conduit, the at least one optical element being part of a light path for light emitted by the light source, where light along the light path passes through a portion of fluid flowing in the flow conduit. An image sensor detects the light and measures content of the portion of the fluid.

Image-based measurement of a fluid

A fluid analyzer of a downhole tool positionable in a wellbore penetrating a subterranean formation is provided. The wellbore has a downhole fluid thereabout. The downhole tool has a downhole flowline for receiving the downhole fluid. The fluid analyzer includes a microflowline fluidly coupled to the downhole flowline to receive the downhole fluid therethrough, a plurality of electrodes positionable in the microflowline to generate an electrical field therebetween and to vaporize the downhole fluid passing therebetween whereby plasma emissions are generated from the downhole fluid, and a plasma detector to measure plasma emissions whereby components of the fluid are detectable.

Fluid analyzer with plasma emission unit and method of using same

Example microfluidic methods and apparatus to perform in situ chemical detection are disclosed. A disclosed example downhole apparatus comprises a microfluidic chamber to introduce a microfluidic-scale drop of a reagent into a formation fluid to form a mixed fluid, a flowline to fluidly couple the formation fluid from a geologic formation to the microfluidic chamber, and a detector to measure a property of the mixed fluid, the property representative of a presence of a chemical in the formation fluid.

Microfluidic methods and apparatus to perform in situ chemical detection

A sensor module for a sensing apparatus configured for operation downhole, within a borehole. The sensor module comprises a sensor array having a plurality of sensors to sense selected formation parameters and a control system for selective and independent operation of each sensor of the sensor array. Each sensor of the sensor array is configured or designed as a discrete sensor unit for individual and independent communication and control. Each sensor of the sensor array may have an associated electronics module that provides standardized electronic connectivity with the control system.

Downhole sensor systems and methods thereof

A gas separation and detection tool for performing in situ analysis of borehole fluid is described. The tool comprises a sampling chamber for a downhole fluid. The sample chamber comprises a detector cell with an opening. The tool also comprises a gas separation module for taking a gas from the downhole fluid. The gas separation module comprises a membrane located in the opening, a support for holding the membrane, and a sealant applied between the housing and the membrane or support. Moreover, the tool comprises a gas detector for sensing the gas.

Detecting gas compounds for downhole fluid analysis

Example methods and apparatus to detect phase separation in downhole fluid sampling operations are disclosed. An example method to detect a phase separation condition of a fluid from a subterranean involves obtaining a sample of the fluid, measuring a first characteristic value of the sample, measuring a second characteristic value of the sample and comparing the first characteristic value to a first reference value associated with a single-phase condition of the fluid to generate a corresponding first comparison result. The example method then compares the second characteristic value to a second reference value associated with the single-phase condition of the fluid to generate a corresponding second comparison result and detects the phase separation condition of the fluid based on the first and second comparison results.

Phase separation detection in downhole fluid sampling

Subterranean sensing devices configured or designed for downhole use to sense a local condition in the well. The sensing devices comprise one or more transistor having at least one carbon nanotube field effect transistor (CNT FET) configured or designed for operation downhole, within a borehole.

Downhole sensing system using carbon nanotube FET

A pressure transducer for high-pressure measurements comprising a housing and a piezoelectric resonator located in the housing, wherein the resonator comprises double rotation cut piezoelectric material configured or designed for vibrating in the fundamental tone of dual modes of the fast and slow thickness-shear vibrations.

Pressure transducer

A downhole characterization apparatus for formation fluids is provided. The apparatus comprises a downhole tool including a flowline for flowing the formation fluids capable of isolating a quantity of the formation fluids in a portion thereof; and a pump unit for depressurizing the isolated formation fluids; and a measurement controller which controls the downhole tool. The measurement controller includes a rough value estimation unit which estimates a rough value of the bubble point pressure of the formation fluids; and a speed controller which controls the depressurizing speed of the pump unit such that the isolated formation fluids are depressurized at a first speed to a certain pressure which is a predetermined value higher than said estimated rough value, and the isolated fluids are depressurized at a second speed which is slower than said first speed in order to measure a precise value of the bubble point pressure.

Method of downhole characterization of formation fluids, measurement controller for downhole characterization of formation fluids, and apparatus for downhole characterization of formation fluids

A sensor apparatus comprising a housing, two or three gyroscope units and three accelerometer units. The gyroscope units are oriented orthogonally respective to each other and mounted within the housing. Each gyroscope unit includes a plurality of gyroscopes with input axes parallel to each other. The accelerometer units are oriented orthogonally respective to each other and mounted within the housing. Each accelerometer unit includes a plurality of accelerometers with detection axes parallel to each other.

Method and apparatus for wellbore survey using inertial sensors

Growing community of inventors

Yokohama, Japan

Tsutomu Yamate