Eastman-kodak Company

Schlumberger Technology Corporation

Andrew Clarke

Lori J Shaw-Klein

Patrice Ligneul

Andrew M Howe

Danuta Gibson

Gerald Henry Meeten

Brian Gray Price

John M Higgins

Stephanie V Desrousseaux

Valerie Judith Anderson

Christopher B Rider

Kenneth J Ruschak

Kwok L Yip

Tianhua Zhang

Nicholas J Dartnell

Terence D Blake

Christopher L Bower

Kim E Goppert

Eloise H Welfare

Cheng-Gang Xie

Wael Abdallah

Mohammed Badri

Trevor J Wear

Andrew Meredith

Kwok-Leung Yip

Edmund John Fordham

Lukasz Zielinski

Mikhail Stukan

John H Hone

Marie Ann Giddins

Christopher Lenn

Paul Naccache

Terry Blake

Shi Su

Christian V Nicholas

Sarah Rieubland

Christopher Barrie Rider

A coreflood experiment may be modeled by generating a three dimensional computer simulation model of a core plug and modeling within the three dimensional computer simulation model one or both of a fluid introduction element or a fluid extraction element of a core holder used in the coreflood experiment. Once generated, the model may be loaded and used when running a simulation to model a heterogeneous distribution of fluid flow proximate one or more faces of the core plug.

Modeling of fluid introduction and/or fluid extraction elements in simulation of coreflood experiment

Sag propensity of a fluid can be determined by applying an oscillatory strain at an amplitude in excess of a linear region and below a yield strain of the drilling fluid. This may include use of medium amplitude oscillatory shear (MAOS), from which an elastic modulus of the fluid is determined. The elastic modulus may be determined over time, from which a time to reach maximum elastic modulus can be determined. The time to reach maximum elastic modulus is then converted or correlated to a drilling fluid sag propensity for the drilling fluid either in absolute terms or in relation to base or comparison fluids. Such an evaluation can be performed using a torsional resonance device in which the oscillatory strain is controllable so as to be maintained relatively constant during the measurement.

System and method for determining sag propensity

Aqueous liquid which has been in contact with a subterranean geological formation, especially a hydrocarbon reservoir, is examined in order to detect or measure viscosifying polymer therein, by flowing a sample of the liquid through a constriction thereby causing extensional flow and alignment of any polymer molecules with the flow, and examining the solution for birefringence of aligned polymer molecules. The amount of birefringence is determined from intensity of light which has passed through the solution relative to intensity of the light source.

Oilfield monitoring of subterranean polymer solution

A method and apparatus for measuring interfacial or surface tension of a first fluid dispersed in a second fluid, the method involving providing at least one substantially spherical droplet or bubble of the first fluid in a flowing stream of the second fluid in a flow channel, followed by passing the flowing stream comprising the droplet or bubble through a constriction in the flow channel, the constriction being sufficiently constricting so as to cause the droplet or bubble to deform away from its substantially spherical shape and measuring and comparing a physical property of the flowing stream both before and after the constriction, wherein the physical property changes as a result of the deformation of the droplet or bubble, and thereby inferring the interfacial or surface tension from the measured physical property.

Determination of interfacial or surface tension

Systems, tools, and methods for enhancing a measurement of a fluid in a borehole, pipe, conduit and/or the like involve an electromagnetic measurement tool that includes a transmitting antenna configured to transmit electromagnetic energy, a receiving antenna configured to receive the electromagnetic energy, and a metamaterial element comprising a negative refractive index. The metamaterial element may focus the electromagnetic energy. The electromagnetic system may comprise one or more antennas that are disposed adjacent to or in contact with the fluid, electromagnetic energy may be transmitted via the transmitting antenna, and the electromagnetic energy may be received with the receiving antenna to measure a property of the fluid.

Use of metamaterial to enhance measurement of dielectric properties of a fluid

Systems, tools, and methods for measurement of a property of a solid body or fluid involve an electromagnetic measurement tool that includes a transmitter configured to transmit electromagnetic energy, a receiver configured to receive the electromagnetic energy, and a metamaterial element comprising a negative refractive index. The metamaterial element may focus the electromagnetic energy. The electromagnetic tool may be placed adjacent the solid body or fluid, electromagnetic energy may be transmitted via the transmitter, and the electromagnetic energy may be received with the receiver to measure a property of the solid body or fluid.

Use of metamaterial to enhance measurement of dielectric properties

Interfacial tension between first and second immiscible liquids is determined using a device in which entrance and exit channels are connected by a cavity with wider cross-section. A flow of the first liquid enters the cavity as a jet and breaks into droplets within the cavity. Passage of a droplet through the exit channel feeds back to perturb the jet entering the cavity. An alternating signal applied to a heating element perturbs the incoming jet and is progressively scanned over a frequency range which includes the system's resonant frequency (frequency of droplet formation with no signal to the heating element). A bandwidth of frequency is observed in which the frequency of droplet formation is phase locked to the frequency applied to the heater. The ratio of resonant frequency to this bandwidth is a measurement of the interfacial tension between the two liquids.

Measurement of interfacial property

A method and system for determining a rock matrix dielectric permittivity. The method and system use a matching liquid with a temperature dependant permittivity. The matching liquid may be used in an automated and/or downhole system for measuring matrix dielectric permittivity of rock formations.

Matrix permitivity determination

A droplet generating device for use as part of a continuous inkjet printer comprises a set of channels for providing a composite flow of a first fluid () surrounded by a second fluid () and an expansion cavity () having an entry orifice () and an exit orifice (). The cross sectional area of the cavity is larger than the cross sectional area of either orifice such that the composite flow breaks up to form droplets of the first fluid within the second-fluid within the cavity, the exit orifice also forming a nozzle of an inkjet device, the passage of the droplets of the first fluid through the exit orifice causing the composite jet to break into composite droplets.

Continuous inkjet drop generation device

A method and device for periodically perturbing the flow field within a microfluidic device to provide regular droplet formation at high speed.

Droplet generator

Systems and methods for analysis of drilling cuttings are described. Complex permittivity is measured of rock cutting samples obtained during drilling operations. The origin of the cuttings is known by flow rate analysis in the drilling system. Various means can be used for rock cutting dielectric measurement. For example, the dielectric measurement can be made by matching the unknown permittivity of the medium to be analyzed to the permittivity of known liquid mixtures by successive saturation and looking for a 'zero-contrast' measurement.

Analysis of drilling cuttings for permittivity

A method and device for passively periodically perturbing the flow field within a microfluidic device to cause regular droplet formation at high speed.

A method for creating composite droplets for use in an ink jet system includes a first fluid () brought into contact with a second fluid within a set of channels (). The interface between the fluids is characterized by an interfacial tension. The first fluid forms spaced droplets () within the second fluid, the composite of the first and second fluids passing through an orifice () to form a jet ().

Continuous ink jet printing of encapsulated droplets

An inkjet printing system comprising a plurality of static inkjet printing units each comprising at least one inkjet printing head; an ink-receiving element comprising a poorly-absorbing or impermeable substrate; an aqueous inkjet composition which comprises a polymeric compound comprising discrete particles responsive to an external stimulus, and a functional material, which may be incorporated as part of the polymeric particles, the composition having a first rheological state and a different second rheological state in response to a stimulated change in conditions, the first state being associated with a first lower viscosity of the composition, wherein the particles have a first lower volume, and the second state being associated with a second higher viscosity of the composition, wherein the particles have a second higher volume, and of drying the aqueous ink composition only positioned downstream of the plurality of the printing units.

Inkjet printing system

A method of creating substantially monodisperse droplets comprising supplying a first fluid () and a second immiscible fluid () within a set of channels, the second fluid surrounding the first fluid and filling the channels to form a composite jet. The composite jet passes through an entrance channel () into a wider cavity (), where the first fluid breaks into droplets (), the resulting composite of droplets of the first fluid within the second fluid passing through an exit channel (). The cross sectional area of the exit channel perpendicular to the flow is smaller than the cross sectional area of the cavity and the passage of a droplet of the first fluid out of the cavity via the exit perturbs the composite flow field within the cavity such that the incoming jet of the first fluid is perturbed.

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Haslingfield, United Kingdom

Andrew Clarke