Schlumberger Technology Corporation

Intelliserv, Inc.

Wellbore Integrity Solutions LLC

Ashley Bernard Johnson

Jonathan Robert Hird

Walter David Aldred

John Mervyn Cook

Michael Paul Barrett

Benjamin Peter Jeffryes

Michael Charles Sheppard

Geoffrey Charles Downton

Gokturk Tunc

Riadh Boualleg

J Ernest Brown

Geoff Downton

Kjell Haugvaldstad

Paul Simon Hammond

Arthur H Hartog

Maurice Ringer

Jonathan James Elphick

Lawrence A Behrmann

Wenbo Yang

Gary Martin Oddie

Joachim Sihler

Fokko Harm Cornelis Doornbosch

Frank F Espinosa

Mauro Caresta

Harry G Barrow

Huseyin Murat Panayirci

Tomas Rosinski

Jarek Rosinski

Cheng-Gang Xie

Ian C Walton

Paul Frederick Cilgrim Dickenson

Devi Putra

Caroline Humphrey

Charles Jenkins

Paul Anthony Francis

Brian Oliver Clark

Jacques J Orban

Gary L Rytlewski

David Milton Eslinger

Trevor Lloyd Hughes

Philip F Sullivan

Dean Michael Willberg

Iain Michael Cooper

Louise Bailey

Jonathan Stuart Phipps

Andrew Meredith

Spyro J Kotsonis

Simon Hastings Bittleston

Eric Lavrut

Paul Bolchover

Gareth P Lees

Jonathan Mitchell

Geoffrey Colin Maitland

Oney Erge

Jonathan Dunlop

Matthew Miller

Simon H Bittleston

Valerian Guillot

Paul William Way

Roger Card

Bernadette Craster

Iain M Rezmer-Cooper

Carlos J Delgado

Kjetil Havre

Franck Bruno Jean Monmont

Diego Medina

Theo Cuny

Paul Dickenson

Paul A Wand

Paul Reid

Don Conkle

David Robert Evan Snoswell

Trevor McLeod

Fabio Cappi

Steven Hart

Michalis Frangos

Charles Roderick Jenkins

David Scott

Adam Colbourne

Richard Dearden

Débora Campos De Faria

Kevin Andre Hermansen

Dean Gardner

William Bertram

Jakub Jerabek

Lee F Dolman

John A McCullagh

Lee Dolman

Göktürk Tunç

Alistair Oag

Hans Seehuus

Pierre-Jerome Acquaviva

Hemant Ladva

John Corben

Ines De Mata Cecilio

Stuart Swift

Sean Lovett

Marcos Allen

Chaobo Qi

Iead Rezek

Lost circulation events are mitigated by determining a size and extent of a formation feature causing the loss of circulation. The formation feature may be determined based on surface drilling parameters, and can apply one or more of a mechanical specific energy, hydraulic, or aperture model. Using such model(s), the size of a fracture/void/aperture can be estimated and a treatment plan for a lost circulation vent can be determined. For instance, a mechanical specific energy of zero can indicate the presence of a void, the pressure at the standpipe can an extent of a formation feature, or the size of the formation feature can be estimated using drilling fluid flow rate, volume, pressure, or rheology. Determining a treatment plan can include selecting or designing a lost circulation material, a volume of lost circulation material, or alternative drilling methods.

Lost circulation mitigation

A method for generating a drilling plan for drilling a wellbore at a field includes receiving data. The data includes one or more of geological properties at the field, wellbore properties, drilling tool parameters, rig characteristics of drilling rigs, and working practices of a plurality of drilling crews. The method also includes generating a plurality of candidate drilling plans for drilling the wellbore at the field. The method also includes estimating one or more outputs for the candidate drilling plans based at least partially upon the data. The one or more outputs include an amount of emissions generated to drill the wellbore using the candidate drilling plans. The method also includes presenting for selection one or more of the candidate drilling plans based at least partially upon the one or more outputs.

Operational emissions framework

Systems and methods are provided that store and release compressed gas, which include an accumulator for storing compressed gas, a gas compressor, a thermal storage subsystem, a plurality of secondary heater stages and a corresponding plurality of gas expander stages, and a secondary heat source. During accumulation operations, the thermal storage subsystem is configured to extract heat from the compressed gas produced by the gas compressor and supplied to the accumulator and store the extracted heat. During the expansion operations, the secondary heater stages and gas expander stages are configured to heat and expand compressed gas supplied from the accumulator and heated by the thermal storage subsystem. The secondary heater stages use heat supplied by the secondary heat source. The secondary heat source can extract heat from a green or renewable system or an industrial process located at or near the system that stores and releases compressed gas.

Thermal impact of gas storage

A cutting element assembly includes a cutter support including a cutter bore. A cutting element is in the cutter bore and a resilient element is integral with the cutter support. The resilient element is longitudinally compressible and has a displacement of greater than 0.1 mm and optionally less than 2 mm. Another cutting assembly includes a cutter support coupled to multiple cutting elements. A resilient element of the cutter support is compressible based on a force applied to the cutter support through one or more of the cutting elements. The resilient element can include a slit in the cutter support. A slit may, for instance, extend perpendicular or transverse to an axis of the cutting elements and allow the cutter support to flex and close off or reduce a size of the slit when forces act on one or more of the cutting elements.

Devices and systems for cutting element assemblies

A method for measuring at least one property of a sample includes obtaining a sample of fluid including at least fines from a downhole environment, exposing the sample to a magnetic field, measuring a magnetic susceptibility of the fines in the sample in response to the magnetic field, and identifying at least one mineral present in the fines based at least partially on the magnetic susceptibility.

Systems and methods for determining the mineralogy of drill solids

Microwave-based drilling systems and methods are provided that employ coiled tubing that is deployed from a spool of coiled tubing to guide propagation of microwave radiation into a borehole. The coiled tubing has a surface end disposed at the spool. Microwave radiation generated at the surface is injected into the surface end of the coiled tubing. The microwave radiation propagates inside the coiled tubing and is used to vaporize rock and extend the borehole.

Systems and methods for microwave-based drilling employing coiled tubing waveguide

In a drill bit which has hard-faced cutting or gauge protection elements positioned to be in direct contact with subterranean formation as the bit is rotated, at least one of these elements includes a window positioned to be in direct contact with the formation or cuttings from the formation as the bit rotates and moves forward to drill into the formation. Electromagnetic radiation with wavelength in the range from 100 nm to 2600 nm is transmitted through the window to the formation in contact with the window. Electromagnetic radiation such as fluorescence that returns through the same window is received by a spectrometer. The source and receiver of electromagnetic radiation are both accommodated within the downhole drilling equipment but spaced from the windowed element. The electromagnetic radiation travels along light guides from the source to the window and from the window to the receiver.

Formation evaluation at drill bit

A stabilizer can include an outer collar, an inner sleeve, and a locking mechanism. The locking mechanism is changeable between a first mode in which the outer collar is rotationally fixed to the inner sleeve and a second mode in which the outer collar is rotationally isolated relative to the inner sleeve. The stabilizer may include an active or passive system for changing modes. An example passive device may include a magnetic clutch where the detected force overcomes magnetic forces to change mode. The stabilizer can be used to mitigate whirl on a rotating device by switching the rotating device between a rotating mode and a non-rotating mode. In the rotating mode, outer collar may rotate with the inner sleeve. In the non-rotating mode, the outer collar may be rotationally isolated from the inner sleeve.

Anti-whirl stabilization tools

A rotary tool for operation within an underground borehole or within tubing in a borehole has a tool body and at least one sensor-containing unit attached to the tool body and positioned to contact the conduit wall. The sensor-containing unit includes an exterior portion to contact the borehole or tubing wall and one or more sensors is located in a cavity between the exterior portion and the tool body. The sensor-containing unit may be formed from the exterior portion, an attachment portion for attachment to the tool body, and one or more connecting portions extending between the attachment and exterior portions, with the sensor-containing cavity between the attachment and exterior portions. Possible rotary tools include drill bits, reamers, mills, stabilizers, and rotary steerable systems.

Downhole tool with sensor set(s) sensitive to circumferential, axial, or radial forces

A rotary tool for operation within an underground wellbore or within tubing in a wellbore has at least one force-sensitive element attached to the tool body and positioned to contact the conduit wall, wherein the force-sensitive element comprises an outer portion to contact the wellbore or tubing wall, at least one connecting portion which is more compliant than the outer portion and through which the outer portion is connected to the tool body, and at least one sensor responsive to force on the outer portion transmitted through the force-sensitive element to the tool body. The sensors may resolve forces into measurable forces on three axes. Possible rotary tools include drill bit, reamer, mill, stabilizer and rotary steerable system for a drill bit.

Instrumented rotary tool with compliant connecting portions

A method of mitigating whirl on a rotating device includes detecting force on a outer surface of the rotating device and switching the rotating device between a rotating mode and a non-rotating mode. In the rotating mode, the outer surface may rotate with an inner sleeve. In the non-rotating mode, the outer surface may be rotationally isolated from the inner sleeve. The rotating device may include a stabilizer with an active or passive system for switching modes. The stabilizer can include an outer collar, an inner sleeve, and a locking mechanism. The locking mechanism is changeable between a first mode in which the outer collar is rotationally fixed to the inner sleeve and a second mode in which the outer collar is rotationally isolated relative to the inner sleeve. An example passive device may include a magnetic clutch where the detected force overcomes magnetic forces to change mode.

Methods for mitigating whirl

Instrumented rotary tool with sensor in cavity

A directional drilling system that includes a drill bit that drills a bore through rock. The drill bit includes an outer portion of a first material and an inner portion coupled to the outer portion. The inner portion includes a second material.

Drilling systems and methods

A drilling system that includes a drill bit that drills a bore through rock. A shaft coupled to the drill bit, wherein the shaft transfers rotational power to the drill bit. A housing that receives at least part of the shaft. A rotary steering system that controls a drilling direction of the drill bit. The rotary steering system includes a steering sleeve that couples to and uncouples from the housing to control a drilling direction of the drill bit.

Rotary steering systems and methods

A method for detecting an influx and/or loss of circulation in a wellbore, comprising measuring a condition in the wellbore using a downhole sensor; determining that a positive displacement pump is shut off or turned on; predicting pit volume and/or gas concentration at a plurality of time points after the positive displacement pump is shut off or turned on using the measured condition in the wellbore prior to the positive displacement pump is shut off or turned on, wherein the measured condition correlates with the pit volume and/or gas concentration; measuring pit volume and/or gas concentration at the plurality of time points; comparing the predicted and the measured pit volumes and/or gas concentrations at the plurality of time points; and producing a warning signal if the difference between the predicted and the measured pit volumes and/or gas concentrations is greater than a pre determined value.

Detection of influx and loss of circulation

Growing community of inventors

Cambridge, United Kingdom

Ashley Bernard Johnson