Schlumberger Technology Corporation

Smith International, Inc.

Shunetsu Onodera

Hitoshi Sugiyama

Masafumi Fukuhara

Brian W Cho

Ahmed Al-Jubori

Peter Thomas Cariveau

Geoffrey Charles Downton

Lance D Underwood

Gokturk Tunc

Maxim Pushkarev

Lawrence C Lee

Brian P Jarvis

Warren E Askew

William E Murray

Andrei Plop

Brian Williams

Nigel Wilcox

Daniel D Alvarado

Kazumasa Kanayama

Hideki Kinjo

Yoko Morikami

Paolo Primiero

Ryuki Odashima

Shin'ichi Houshuyama

Vanessa Dreuillault

Techniques involve a motor assembly including a rotor and a stator. The stator includes a contact surface for contacting an outer surface of the rotor. The contact surface includes a rigid material. The motor assembly also includes at least one constraint disposed along a length of the motor assembly, where the constraint constrains a radial and/or tangential movement of the rotor relative to the stator. The at least one constraint may be disposed at one or more proximate ends of the motor assembly, and/or along the length of the motor assembly. The contact surface of the stator may have a profile including peaks and valleys, and in some embodiments, the contact surface may be treated to reduce friction and/or wear.

Apparatus and method for controlling or limiting rotor orbit in moving cavity motors and pumps

A moving cavity motor or pump, such as a mud motor, comprising: a rotor, a stator, and one or more apparatus for constraining (i.e., controlling or limiting) the movement of the rotor relative to the stator.

A method and system for monitoring any incursion of particulate matter from a gas hydrate formation into a well casing used for the production of the gas hydrate and determining the degree of incursion of particulate material within the distal end of the well casing.

Method and system for monitoring the incursion of particulate material into a well casing within hydrocarbon bearing formations including gas hydrates

Methods and systems for acoustically determining reservoir parameters of subterranean formations. A tool comprising a plurality of acoustic sources and configured for acoustic measurements is deployed within a wellhole. Acquired acoustic data are processed and utilized for deriving key parameters for the formations. The plurality of acoustic sources include a plurality of hammer sources, where at least one of the hammer sources includes an actuator that is adapted to strike a surface to generate acoustic energy.

Methods and systems for acoustically monitoring formations

A circulation pump for circulating downhole fluids is provided. The circulation pump includes a cylindrical pump housing, a shaft secured in the pump housing extending in a longitudinal direction thereof, an impeller rotating around the shaft in the pump housing, a cylindrical magnetic coupler rotating around the pump housing, the cylindrical magnetic coupler including a magnet, and a motor positioned outside of the pump housing and connected to the magnetic coupler to rotate the magnetic coupler around the pump housing. The impeller is provided with a magnetic piece, which is capable of being magnetically connected with the magnet of the cylindrical magnetic coupler to cause the impeller to rotate around the shaft by rotating the cylindrical magnetic coupler around the pump housing.

Circulation pump for circulating downhole fluids, and characterization apparatus of downhole fluids

A method and system for the production of a gas hydrate including the steps of drilling into a subterranean gas hydrate formation and at least partially depressurizing the gas hydrate formation to permit separation of gas and water from the hydrate form. The gas and water is then pumped from the formation and recovered from the well. At least a portion of water pumped from the well is water that is introduced into the well from the surface or reintroduced by a feed back loop from the production operation.

Method and system for development of hydrocarbon bearing formations including depressurization of gas hydrates

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Cheltenham, United Kingdom

Shunetsu Onodera