Weatherford/lamb, Inc.

Cidra Corporation

Weatherford Technology Holdings, LLC

Aps Technology, Inc.

Teleco Oilfield Services Inc.

Other

Baker Hughes Corporation

Teleco Oilfied Services Inc.

Guy A. Daigle

Guy A Daigle

John J Grunbeck

James R Dunphy

Robert J Maron

Carl Allison Perry

Mark R Fernald

Richard Todd Jones

Trevor Wayne MacDougall

Domino Taverner

Thomas Wolfgang Engel

Steven Rountree

Trevor Macdougall

Milton E Ives

Alan D Kersey

Timothy J Bailey

Arthur D Hay

Phillip E Pruett

Milton E Ives, Jr

Mark E Wassell

George Talmadge

John Grunbeck

Bryan Boemmels

Martin A Putnam

Michael A Davis

James M Sullivan

Christopher J Wright

Daniel E Burgess

Matthew B Miller

Allen R Davis

George J Talmadge

Christopher T Chipman

F Kevin Didden

Charles W Helm

Roy Nordstrom

Richard Niezgorski

Peter Gumprecht

William E Breuer, Jr

Richard Matthew Rothstein

Bradley A Currier

Christopher S Funke, Jr

Leonard Goldman

James Tsang

Joseph Dudek, Jr

William Bruck

A downhole tool is described that includes at least three sections welded together. The downhole tool has a downhole section, an intermediate tool section mounted to the downhole section with a lower weldment, and an uphole section positioned opposite the downhole section mounted to the intermediate tool section with an upper weldment. The downhole tools as described herein include an elongate internal passage that extends from the downhole section to the uphole section through the lower weldment and the upper weldment. The elongate internal passage is sized to receive drilling fluid therethrough. Furthermore, one or more of the downhole section, the intermediate tool section, and the uphole section includes: a) at least one sensor module, b) a cavity, and c) a plurality of bores (holes). In certain embodiments, the downhole tool may be triple combo tool, an acoustic logging tool, or a directional tool, such as a steerable tool.

Downhole tool with multiple welded section

An embodiment includes a downhole tool with first and second modular connectors. The connection modules are configured to aid make-up and assembly and improve stability during use.

Downhole drilling tools and connection system for same

An optical transducer is provided. A 'measuring' portion of the transducer may be exposed to a high pressure and fluids when the optical transducer is deployed (e.g., in a wellbore or other industrial setting). The transducer may include an optical waveguide with a first portion that forms a first seal that isolates an 'instrumentation' portion of the transducer from exposure to the high pressure and fluids to which the measuring portion may be exposed. The transducer may also include a second seal with a &#x201c;stack&#x201d; of material elements that contact a second portion of the optical waveguide to also isolate the instrumentation portion of the transducer from exposure to the high pressure and fluids to which the measuring portion may be exposed.

Optical transducer with integrated feedthrough

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

Embodiments of the present invention generally relate to methods and apparatuses for gripping and shearing a downhole cable. In one embodiment, a line cutter mandrel includes: a tubular mandrel; a pocket disposed along an outer surface of the mandrel and longitudinally coupled to the mandrel; a channel disposed through the pocket for receiving a cable; and a line cutter. The line cutter includes a blade, is operable to engage an outer surface of the cable in a gripping position, is operable to at least substantially sever the cable with the blade in a cutting position, and is operable from the gripping position to the cutting position by relative longitudinal movement between the cable and the pocket.

Downhole cable gripping/shearing device

A sensor for sensing the pressure of a first fluid is provided. In one embodiment, sensor for sensing the pressure of a first fluid includes a fiber optic based sensing element disposed in a housing. A buffer fluid is disposed in the housing and is in fluid communication with the sensing element. A pressure transmitter is coupled to the housing for maintaining a predefined relationship between pressures of the first fluid and buffer fluid. A connector assembly is coupled to the housing and is coupled by an optical fiber is the sensing element. The sensor having a connector assembly is suitable for use in harsh conditions, such as within oil and gas well applications.

Pressure sensor assembly suitable for use in harsh environments

A method and device for pressure sensing using an optical fiber having a core, a cladding and a Bragg grating imparted in the core for at least partially reflecting an optical signal at a characteristic wavelength. The cladding has two variation regions located on opposite sides of the Bragg grating to allow attachment mechanisms to be disposed against the optical fiber. The attachment mechanisms are mounted to a pressure sensitive structure so as to allow the characteristic wavelength to change according to pressure in an environment. In particular, the variation region has a diameter different from the cladding diameter, and the attachment mechanism comprises a ferrule including a front portion having a profile substantially corresponding to at least a portion of the diameter of the variation region and a butting mechanism which holds the ferrule against the optical fiber.

Optical sensor device having creep-resistant optical fiber attachments

A method and device for tuning an optical device including an optical fiber having a core, a cladding and a Bragg grating imparted in the core to partially reflect an optical signal at a reflection wavelength characteristic of the spacing of the Bragg grating. The cladding has two variation regions located on opposite sides of the Bragg grating to allow attachment mechanisms to be disposed against the optical fiber. The attachment mechanisms are mounted to a frame so as to allow the spacing of the Bragg grating to be changed by an actuator which tunes the reflection wavelength. In particular, the variation region has a diameter different from the cladding diameter, and the attachment mechanism comprises a ferrule including a front portion having a profile substantially corresponding to diameter of the variation region and a butting mechanism butting the ferrule against the optical fiber.

Optical filter device having creep-resistant optical fiber attachments

A fused tension-based fiber grating pressure sensor includes an optical fiber having a Bragg grating impressed therein. The fiber is fused to tubes on opposite sides of the grating and an outer tube is fused to the tubes to form a chamber. The tubes and fiber may be made of glass. Light is incident on the grating and light is reflected from the grating at a reflection wavelength &lgr; . The grating is initially placed in tension as the pressure P increases, the tension on the grating reduced and the reflection wavelength shifts accordingly. A temperature grating may be used to measure temperature and allow for a temperature-corrected pressure measurement.

Fused tension-based fiber grating pressure sensor

A pressure sensor assembly for determining the pressure of a fluid in a harsh environment includes a pressure sensor suspended within a fluid filled housing. The assembly includes a pressure transmitting device which transmits the pressure of the fluid to sensor and maintains the fluid within the housing in a void free condition. The pressure sensor assembly maintains the sensor in a near zero base strain condition and further protects the sensor from shock and vibration. The pressure sensor assembly further includes bumpers that limit the movement of the sensor within the housing.

Pressure sensor assembly structure to insulate a pressure sensing device from harsh environments

A creep-resistant optical fiber attachment includes an optical fiber,, having a cladding,and a core,, having a variation region,(expanded or recessed) of an outer dimension on of the cladding and a structure, such as a ferrule,, disposed against least a portion of the variation region,. The fiber,is held in tension against the ferrule and the ferrule,has a size and shape that mechanically locks the ferrule,to the variation,, thereby holding the fiber,in tension against the ferrule,with minimal relative movement (or creep) in at least one axail direction between the fiber,and the ferrule,. The ferrule,may be attached to or part of a larger structure, such as a housing. The variation,and the ferrule,may have various different shapes and sizes. There may also be a buffer layer,between the cladding,and the ferrule,to protect the fiber,and/or to help secure the ferrule,to the fiber,to minimize creep.

Creep-resistant optical fiber attachment

A fiber optic Bragg grating pressure sensor particularly suited for measuring ambient pressure of a fluid includes a pressuring detecting device,such as a glass element whose elastic deformation is proportional to applied pressure. An optical fiber,with an integral first grating,is wrapped at least once around the device and has at least a portion of its length fused to the device,such that elastic deformation of the device,generates a corresponding axial strain in the fiber,and/or the grating,and thus a corresponding change of the fiber length and/or characteristic reflectance wavelength of the grating,. A second grating,may be formed near the pressure detecting device,so as to sense ambient temperature but not be affected by deformation of the device,for temperature compensation. Also, the fiber,may have more than one grating or be doped at least between a pair of gratings,, to form a fiber laser or a DFB fiber laser which lasing wavelength changes with changing pressure.

Fiber optic bragg grating pressure sensor

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Plainville, CT, United States of America

Guy A Daigle