Halliburton Energy Services, Inc.

Chevron U.s.a. Inc.

Mark Anthony Sitka

John Ransford Hardin, Jr

Gregory N Gilbert

Kristopher V Sherrill

James E Stone

Zbigniew Sobolewski

David Welshans

Randal Thomas Beste

Larry DeLynn Chambers

Ronald L Spross

Preston N Weintraub

Tony T Vu

Pedro R Segura

Gary Nguyen

Larry Delynn Chambers

Michael S Bittar

Mark Anton Proett

Richard Thomas Hay

Daniel Winslow

James H Dudley

Jesse Kevin Hensarling

Ronald G Earles

Laban M Marsh

Imran Sharif Vehra

Michael W Holcombe

Jean Michel Beique

Jeffrey Bowden Lasater

Christopher Neil Marland

John R Hardin

Mukul M Agnihotri

Ricardo Ortiz

Sergei Sharonov

Malcolm Douglas McGregor

James M Fogal

Vadim Minosyan

Glenn C Gray

Christopher Anthony Maranuk

William Edward Hendricks

Malcolm Douglas Mcgregor

Pedro Segura

David M Welshans

Vadim Yuryevich Minosyan

Randal T Beste

Jr John R Hardin

Kristopher V Sherril

A device comprising a housing having a longitudinal dimension; a linear actuator including a casing coupled to the housing; an actuator shaft having an exterior surface and configured to be longitudinally translated relative to the casing; and a seal assembly engaging the housing and sealingly engaging the exterior surface. The device also comprising a motor assembly disposed within the housing, the motor assembly including a motor case and a motor shaft, the motor shaft configured to rotate one of the seal assembly or the actuator shaft.

Device including a seal assembly

A electrical conveyance for downhole tools is disclosed. The electrical conveyance system may include an electrical power manifold, a drill string coupled to the electrical power manifold, a multi-conductor conduit extending through an interior of the drill string, and a stinger assembly extending from an exterior of the electrical power manifold to an interior of the electrical power manifold to couple the multi-conductor conduit to an electrical power source.

Electrical conveyance for downhole tools

Methods and apparatus are disclosed for generating fluid pulses in a fluid column, such as within a well. A described example fluid pulse generator has a valve member comprising a piston that is linearly movable within a piston chamber to control flow by selectively obstructing a fluid passage. The fluid passage may extend around at least a portion of the piston chamber and intersect at an angle relative to the axis of movement of the valve member. The piston is linearly movable, such as from a closed or minimal-flow position to a maximal-flow position, and optionally to any of a number or range of positions therebetween. The position of the valve member may be varied to generate fluid pulses of a selected pattern of duration, amplitude, and so forth, to generate a signal within the fluid column detectable at a location remote from the fluid pulse generator.

Method and apparatus for generating pulses in a fluid column

A method of operating a drill string comprises independently modifying a rotary speed of a downhole portion of the drill string relative to other downhole portions of the drill string, each of the portions comprising a plurality of drill pipe sections. The modified-speed portion of the drill string can comprise a downhole end portion of the drill string extending between a downhole drill string end and a curved portion of the borehole in which the drill string is located. The downhole end portion can be rotated at an increased speed relative to a portion of the drill string coincident with the curved portion of the borehole. Independent speed modification can be effected by incorporating one or more transmission modifier devices in the drill string, the transmission modifier device being switchable between a disengaged mode in which it transfers unmodified drill string torque and rotation, and an engaged mode in which it transmits torque and rotation along the drill string at a modified speed and torque. Selective switching of the transmission modifier devices, while downhole, maybe controlled from the surface.

Independent modification of drill string portion rotational speed

A disclosed example embodiment includes an antenna assembly for use in a well logging system. The antenna assembly includes a flexible, non-conductive cylindrical core having an outer surface and an electrically conductive path positioned on the outer surface of the core. The electrically conductive path forms an electromagnetic coil operable to transmit or receive electromagnetic energy. The electrically conductive path is formed on the core without winding a wire around the core using, for example, a removal process selected from the group consisting of milling, machining, etching and laser removal, an additive process selected from the group consisting of printing with conductive and dielectric inks and silk screening with conductive and dielectric epoxies or an integrated material deposition process such as a multi-material 3D printing process. The antenna assembly may be flexible mounted on a tubular member during assembly of a well logging tool.

Flexible antenna assembly for well logging tools

A method of modulating information on pressure fluctuations transmitted via a tubular string can include applying pressure to a piston, thereby axially displacing the piston, axially displacing and rotating an intermediate sleeve in response to the piston displacement, rotating an output member in response to the axial displacement and rotation of the intermediate sleeve, and rotating a variable flow restrictor rotor relative to a stator, the rotor being connected to the output member. A mud pulser can include a variable flow restrictor, and an actuator which operates the flow restrictor and modulates information on pressure fluctuations produced by the flow restrictor, the actuator including a piston which displaces axially in response to a pressure differential, an intermediate sleeve which is both rotated and displaced axially by the piston, and an output member which is rotated by both rotation and axial displacement of the intermediate sleeve.

Mud pulser with high speed, low power input hydraulic actuator

A downhole assembly including a turbine to be disposed within a wellbore and a rotating array. The rotating array includes magnetic material and is coupled to the turbine. The downhole assembly also includes a magnetostrictive material coupled to the rotating array to strain the magnetostrictive material to induce an electric current in a conductor coupled to the magnetostrictive material.

Systems and methods of harvesting energy in a wellbore

The subject matter of this specification can be embodied in, among other things, a system for mounting a strain sensor on a tubular pipe, which includes a mechanical clamp. The clamp has a bottom flexing section having an arcuate portion terminating at a first terminal and at a second end, and a first and second upper flexing sections having an arcuate portions terminating at first terminal ends and at second terminal ends in a pivot pin assembly having a bore parallel to a central longitudinal axis of the clamp, the bore there through for receiving a removable connector. Sensor mounting arms are disposed outwardly on the first and second upper flexing sections, said sensor mounting arms including at least one receptacle sized to receive and retain ends of a strain gauge.

Mounting bracket for strain sensor

A method and assembly to produce data pulses in a drilling fluid in a drill string. The assembly comprises a shear valve that includes a valve member mounted in a valve passage in fluid flow communication with a fluid flow conduit of a drill string to which the assembly is connectable. The valve member is connected to a reciprocation mechanism comprising a rocker, a driven crank arrangement, and a slider member that provides a sliding coupling between the crank arrangement and the rocker. The slider member is pivotally connected to the crank arrangement, is keyed to the rocker for angular displacement about a valve axis, and is radially slidable relative to the rocker, so actuation of the crank arrangement causes angular reciprocation of the rocker, and hence of the valve member, about the valve axis, to produce data pulses in the drilling fluid.

Apparatus and method to produce data pulses in a drill string

The subject matter of this specification can be embodied in, among other things, a system for removably attaching an optical fiber sensor loop onto a tubular member, which includes an optical fiber sensor loop having a continuous optical fiber positioned arranged in a plurality of loops, each of said loops having a first end turn and a second end turn, a first and a second turn guide each including a plurality of turn grooves increasing outwardly in increasing radii, each of said turn grooves configured to receive an end turn portion of the optical fiber, a first and a second supporting wedge each having a planar first surface configured to receive a turn guide and a curved second surface configured to be received on the tubular member, and a connector configured to couple the first mounting wedge to the second mounting wedge.

Portable attachment of fiber optic sensing loop

A downhole tool includes a tool body, stator, and rotor. The tool body is aligned along a tool centerline and includes an aperture therethrough operable to pass a fluid to an exterior of the body. The stator is fixed relative to the tool body and includes a fluid flow restriction operable to pass at least a portion of the fluid from an interior of the stator to the exterior of the body at an adjustable flow rate. The rotor is disposed within the tool body and rotatable relative to the stator and includes an exhaust port selectively aligned with at least one aperture through the tool body by rotation of the rotor relative to the stator. The exhaust port is operable to pass at least a portion of the fluid from an interior of the rotor to the exterior of the body when aligned with the aperture.

Generating fluid telemetry

A fluid pulse generator for use in a drill string comprises an elongate obstruction member mounted in a fluid passage for driven pivoting about a pivot axis transverse to the fluid passage, obstruction of the fluid passage by the obstruction member being variable in relation to pivotal position of the obstruction member. Telemetry signals can be transmitted along the drill string by driven pivoting of the obstruction member, to generate data pulses in drilling fluid in the drill string. Pressure-locking of the obstruction member in a maximally obstructive position can be counteracted by provision of a bypass arrangement to allow bypass flow at a leading end of the obstruction member.

Borehole fluid-pulse telemetry apparatus and method

Growing community of inventors

Richmond, TX, United States of America

Mark Anthony Sitka