Schlumberger Technology Corporation

John Yarnold

Matthew W Niemeyer

Kirk Wallace Flight

Gary L Rytlewski

Baptiste Germond

Larry W Phillips

Jeffrey Marabella

Jason Gandolfi

Matt W Niemeyer

Javier Cascudo

John A Kerr

Laure Mandrou

Peter Nellessen, Jr

Tauna Lea Leonardi

Joseph D Scranton

Quangen Du

Ronald James Spencer

John Skaggs

In-riser power generation devices and methods are utilized to generate power subsea to operate subsea devices of a subsea well system. A turbine power generator is located in fluid communication with a subsea fluid flow path of a subsea well system and the turbine power generator is operationally connected to a subsea power device.

In-riser power generation

A technique facilitates monitoring of strain related effects along a tubing string, such as a tubing string extending from surface equipment toward a sea floor in a subsea well application. A monitoring module is employed to monitor the strain related effects and may have a tubular structure. The monitoring module also has a reduced wall thickness region constructed to concentrate strain in this reduced wall thickness region. Additionally, the monitoring module comprises at least one sensor mounted to the tubular structure in the reduced wall thickness region for monitoring of strains.

Monitoring tubing related equipment

A method for pressurizing a hydraulic accumulator includes creating an annulus pressure zone in hydraulic communication with the hydraulic accumulator through a hydraulic recharging circuit and applying a hydraulic pressure to the annulus pressure zone. Operating the hydraulic recharging circuit in response to applying the hydraulic pressure and pressurizing the hydraulic accumulator in response to operating the hydraulic recharging circuit.

In-riser hydraulic power recharging

A piping system for housing system components for regulating the flow of fluid therethrough is provided. The piping system includes an inner small diameter length of piping through which hot fluids flow, an outer larger diameter length of piping surrounded by cold fluid, and an annulus between the small and larger diameter piping in which the system components are received. Insulation material extends about a predetermined section of the small diameter length of piping for restricting heat transfer therefrom to the system components in the annulus and allowing heat transfer from the system components in the annulus to the outer piping.

Piping system having an insulated annulus

An apparatus includes an engagement device to be disposed on a landing string. The engagement device includes a retracted state to allow the apparatus to be run inside a riser and an expanded state to engage the riser to secure the apparatus to the riser. The apparatus further includes an actuator assembly to be disposed on the landing string. The actuator assembly is remotely actuatable from a sea surface to rotate a tubing of the landing string relative to the engagement device to rotate the landing string to orient a tubing hanger assembly.

Orienting a subsea tubing hanger assembly

A technique enables protection of subsea wells. The technique employs a subsea test tree designed to ensure control over the well in a variety of situations. The subsea test tree is formed with at least one shut-off valve to protect against unwanted release of fluids from the subsea test tree. The subsea test tree also is coupled with and controlled by a control system having a subsea control module mounted to an interior mandrel.

Subsea control system with interchangeable mandrel

A technique facilitates powering of devices at a subsea location without requiring routing of hydraulic pressure and/or electric signals through an umbilical from a surface location. A fluid flow, such as an injection chemical fluid flow, is at least partially routed through a flow converter disposed at a subsea location. The flow converter converts energy from the fluid flow to energy used to operate a power generation device. The power generation device may be designed to generate electrical, hydraulic, or other suitable power which is utilized at the subsea location.

Power generation at a subsea location

A control system is for completion installation, intervention and testing activities at a subsea location. The control system has a first control circuit at a surface location; a subsea test tree located in a blowout preventer at the subsea location, the second control circuit located within a riser extending from the blowout preventer towards the surface location; and a plurality of sensors monitoring characteristics of the subsea location. The second control circuit communicates with the first control circuit and receives the characteristics of the subsea location. The second control circuit also controls electrically powered subsea valves based upon commands from the first control circuit and based upon the characteristics of the subsea location to complete a completion installation, intervention, and/or testing activity.

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League City, TX, United States of America

John Yarnold