Weatherford/lamb, Inc.

Lumeda Inc.

Cidra Corporation

Qorex LLC

3m Innovative Properties Company

Other

Weatherford Technology Holdings, LLC

Petrospec Engineering Ltd.

Trevor Wayne MacDougall

Paul Eric Sanders

Martin A Putnam

Domino Taverner

Mark R Fernald

Alan D Kersey

Timothy J Bailey

James R Dunphy

John J Grunbeck

Richard Todd Jones

Yi Yang

Edward Michael Dowd

Guy A Daigle

Jerin J Russell

Matthew J Patterson

John R Troll

Moses Mekala David

James M Sullivan

Jay Walter Dawson

James Francis Brennan, Iii

Robert N Brucato

Brian J Gates

James S Sirkis

Thomas Wolfgang Engel

Christopher J Wright

Bryon J Cronk

Matthew B Miller

Andrew S Kuczma

Milton E Ives, Jr

Christopher T Chipman

Brian J Pike

Rebecca S Bryant

Edward Hernandez

Michael Arcand

Michael A Davis

Joseph Francis Pinto

David A Krohn

Brian Kenneth Nelson

Mokhtar S Maklad

Leonard A Johnson

Jay W Dawson

John A Valenti

Minfu Lu

Sanders Paul

Bryan Outlaw

Freddie Falero, Jr

Francesco Birritta

Duane J Rodriguez

In some implementations, the device may include an optical diffuser assembly having a plurality of light emitting devices positioned along an axis adjacent to one another and the plurality of light emitting devices are adapted to be selectively addressable to produce an irradiance pattern for each of the plurality of the light emitting devices.

Configurable optical applicator

In some implementations, a PDT delivery device is disclosed that may include a housing including a handle, a fiber lock orifice, a probe insertion orifice and a tube retraction groove positioned between the fiber lock orifice and the probe insertion orifice. In addition, the PDT delivery device may include an insertion probe having a stepped hollow cylinder positioned within the probe insertion orifice and within the tube retraction groove and having an insertion needle at a distal end. The PDT delivery device may include a fiber locking mechanism and a probe release mechanism selectively movable between an unlock position and a lock position. Also, the PDT delivery device may include a probe retraction mechanism releasably coupled to the insertion probe. Further, the PDT delivery device may include a retraction trigger coupled to the probe retraction mechanism to translate the insertion probe between an insertion position and a retraction position.

Interstitial photodynamic therapy probe delivery device

A photodynamic therapy (PDT) apparatus and method are disclosed. The PDT apparatus includes a light flap that includes a plurality of light emitting devices wherein each of the light emitting devices has a plurality of operating states. The plurality of operating states are used to train a neural network model capable of producing a treatment irradiance profile. The method includes using an image of an area of interest for targeted treatment of PDT wherein the image is used an input to the trained neural network model. The neural network model produces a plurality of optimized feature states and the apparatus in turn produces a treatment irradiance profile closely matching the area of interest.

Optical applicator feature optimizer

In some implementations, a PDT system may include a probe assembly having an elongated cylinder having a probe inner diameter and a probe outer diameter optical surface and a probe tip positioned on a distal end, a therapy window positioned proximal the probe tip, a door positioned inside of the elongated cylinder and configured to move between an open position to expose the therapy window and a closed position to seal the therapy window, a balloon positioned within the inner probe diameter, a cylindrical light diffuser position inside of the balloon, and a detector fiber positioned proximate the cylindrical light diffuser.

Small profile light therapy probe

A photodynamic therapy (PDT) apparatus and method are disclosed. The PDT apparatus can include a flexible optical applicator that includes a plurality of light emitting devices for producing an irradiance pattern of therapy light to a target area of a patient. The PDT system includes an optical light controller that includes a computer processor. The method disclosed includes determining a treatment plan based on a plurality of therapy light parameters, photosensitizing drug selection, patient specific parameters, optimized light interval and other relevant parameters. The method further includes monitoring the application of the therapy light against the treatment plan and determining an updated treat plan in the event of a deviation from an initial treatment plan.

A therapeutic light delivery apparatus and method are disclosed. The apparatus includes a light source, a plurality of light emitting devices paired with a plurality of light detecting devices, wherein each of the light emitting devices is in optical communication with a channel of a delivery optical switch and each of the plurality of light detection devices is in optical communication with a channel of a detection optical switch. The plurality of light emitting devices are fixedly positioned within an applicator light flap. The system further includes an optical detector in optical communication with the detector optical switch. The system further includes an opto-electronic controller that controls delivery optical switch, the detector optical switch and the light source.

Time mulitplexed dosimetry system and method

A therapeutic light delivery apparatus and method are disclosed. The apparatus includes a light source and an integrated optical applicator. The integrated optical applicator includes a plurality of light emitting devices and detector fibers fixedly spatially positioned within a flexible matrix material. The light emitting devices can be positioned a predetermined distance from an application side of the integrated optical applicator comprising an accurate and repeatable standoff position. A flexible matrix material is disclosed having a high scattering coefficient to produce a uniform irradiance pattern and predetermined fluence. A method of performing a photodynamic therapy procedure is disclosed that includes providing an integrated optical applicator couple to a therapy light source, providing a photosensitizing drug to a tissue of a patient, positioning an application side of the integrated optical applicator against a target area of the tissue, delivering a therapy light to the target area, and producing an irradiance pattern.

Optical surface applicator with integrated diffuser

Embodiments of the present disclosure include a low crosstalk, optical fiber based disturbance detection system that includes single-mode optical fiber (SMF) arranged into dual ring Sagnac interferometer wherein both rings share a common sensing section of optical fiber path length. Certain embodiments further include fiber Bragg gratings (FBG's), circulators and couplers to be able to separate the optical signals of the two rings of the dual ring Sagnac interferometer and to perform processing of their individual signals. Embodiments are also disclosed that enable the position of a physical disturbance, the magnitude of the physical disturbance and the frequency of the physical disturbance to be known.

Low crosstalk, common path, dual ring sagnac interferometer for disturbance sensing

An optical sensor apparatus illuminates nested optical cavities by a broadband light source, such as a tunable laser. A composite interference signal is obtained from light reflected from the nested optical cavities, partial interference spectra are recovered from the composite interference signal, cavity depths are measured based on the partial interference spectra, and electrical signals are provided based on the final measured cavity depths.

Method for analyzing nested optical cavities

Techniques and systems suitable for performing low-loss fusion splicing of optical waveguide sections are provided. According to some embodiments, multiple laser beams (from one or more laser) may be utilized to uniformly heat a splice region including portions of the optical waveguide sections to be spliced, which may have different cross-sectional dimensions. According to some embodiments, the relative distance of the optical waveguide sections and/or the power of the multiple laser beams may be varied during splicing operations.

Large diameter optical waveguide splice

A sensing cable includes a pair of sensing fibers that are connected to one another by a U-shaped turnaround section. The turnaround section is a section of sensing fiber coated with a jacket that includes metallic components. The turnaround section is bent and, then, annealed according to a method of the present invention. The turnaround section is robust and reduced in size (i.e., radius). The sensing cable also includes an inner sleeve that surrounds the sensing fibers and an elongated outer armor casing (i.e., including an armor tube and a sealing cap) that encases a terminating end thereof. The armor tube and the sealing cap protect the sensing fiber from mechanical and chemical harm, are reduced in size and facilitate insertion of the sensing cable into downhole environments. The sensing cable has improved operating range up to 300&#xb0; C.

High temperature fiber optic turnaround

Methods and apparatus enable monitoring conditions in a well-bore using multiple cane-based sensors. The apparatus includes an array of cane-based Bragg grating sensors located in a single conduit for use in the well-bore. For some embodiments, each sensor is located at a different linear location along the conduit allowing for increased monitoring locations along the conduit.

Array temperature sensing method and system

A holographic pressure sensing apparatus includes a first optical fiber with a diffractive element at its end face, and a light-coupling component for receiving from the first optical fiber end face first and second images respectively formed by interaction with the diffractive element of a first light of a first wavelength and a second light of a second wavelength. Displacement of the light-coupling component, toward or away from the first optical fiber end face, will adjust an overlap of the first and second images, such that a change in a measurement of said overlap will indicate a change of the pressure in the fluid surrounding the casing.

Multi-mode holographic pressure sensor

A sensing cable has a sensing fiber assembly, which includes a pair of sensing fibers joined by a turnaround section with a modal filter, at a terminating end of the sensing fibers. The sensing cable also includes an inner sleeve that surrounds the sensing fiber assembly and an armored casing that caps the terminating end of the inner sleeve. The sensing cable has a low profile and its components are each made of high temperature and hydrogen tolerant materials and are capable of prolonged operation at high temperatures, such as up to 300&#xb0; C., in hydrogen environments over long lengths of fiber. A distributed thermal sensing (DTS) interrogator is connected to the sensing cable and performs DTS measuring according to protocols and algorithms that leverage the modal filter of the turnaround section to calculate temperature readings along the sensing fiber assembly.

Low profile, high temperature, hydrogen tolerant optical sensing cable

Growing community of inventors

Simsbury, CT, United States of America

Trevor Wayne MacDougall