Schlumberger Technology Corporation

Prad Research and Development Nv

Services Petroliers Schlumberger

Schlumberger Holdings Limited

Prad Research and Development Limited

Schlumberger Oilfield Assistance Limited

Olivier Sindt

Hossein Akbari

Julien Ramier

Michael Shepherd

Rogerio Tadeu Ramos

Geoff Downton

Jagdish H Shah

Agathe Robisson

Cliff Evans

Lawrence C Lee

Mark William Dalton

Francois Clouzeau

Robert Ian Robson

Philip Dryden

Laurent Carteron

Norman Ward

Steven Hart

David White

Joachim Sihler

The present invention recites a method of fabricating a stator for a downhole motor, the method comprising the steps of providing a stator tube having an interior surface and applying a bonding agent to the interior surface of the stator tube. Additionally, a mandrel is positioned within the stator tube, the mandrel having an outer geometry that is complimentary to a desired inner geometry for the stator. Furthermore, a reinforcing material is introduced into the stator tube to fill space between the mandrel and the interior surface of the stator tube and subsequently solidified to bond the reinforcing material to the interior surface of the stator tube. The mandrel is then removed from the bonded stator tube and reinforcing material such that a stator is fabricated.

Stators for downhole motors, methods for fabricating the same, and downhole motors incorporating the same

The present invention recites a method of fabricating a stator for a downhole motor, the method comprising the steps of providing a stator tube having an interior surface and applying a bonding agent to the interior surface of the stator tube. Additionally, a mandrel is positioned within the stator tube, the mandrel having an outer geometry that is complimentary to a desired inner geometry for the stator. Furthermore, a reinforcing material is introduced into the stator tube to fill space between the mandrel and the interior surface of the stator tube and subsequently solidified to bond the reinforcing material to the interior surface of the stator tube, The mandrel is then removed from the bonded stator tube and reinforcing material such that a stator is fabricated.

Stators for downwhole motors, methods for fabricating the same, and downhole motors incorporating the same

The present application discloses a progressive cavity motor or pump component, either stator or rotor, which provides a high glass transition temperature polymeric surface on the component which becomes resilient at or below the expected operating temperature of the motor or pump, but which remains solid at ambient temperatures, along with a method of fabricating either a stator or a rotor with such surface characteristics. Since the surface becomes resilient, the progressive cavity pump operates efficiently at temperatures above the glass transition temperature of the selected polymeric surface.

Method of fabricating a high temperature progressive cavity motor or pump component

A skinned rotoror skinned statorof a progressive cavity apparatus is described. A rotorcan be skinned by threading a sleevewith a profiled helical outerand profiled helical innersurface onto a corewith a profiled helical outer surface. A rotor () can also be skinned by inserting a non-helical core () into a non-helical longitudinal bore () of a sleeve () with a profiled helical outer surface (). A statorcan be skinned by threading a tubular linerwith profiled helical innerand profiled helical outersurfaces into a profiled helical boreof a tube. A stator () can also be skinned by inserting a tubular liner () with a non-helical outer surface () into a non-helical bore () of a tube ().

Skinning of progressive cavity apparatus

Cast material rotor () with profiled helical outer surface (). Cast material layer () can be disposed between core () and tube (). Profiled helical outer surface () can be in tubeor cast material layer, respectively. Method of forming rotorcan include filling void between outer surfaceof coreand longitudinal boreof tubehaving profiled helical outer surfacewith cast materialin fluid state, and solidifying cast material. Tubecan be disposed within profiled helical boreof mold, e.g., before solidifying cast material. Method of forming rotorcan include filling void between outer surfaceof coreand profiled helical borein moldwith cast materialin fluid state, solidifying cast materialto impart profiled helical outer surfacethereto, and removing moldfrom cast material

Rotor of progressive cavity apparatus and method of forming

A Moineau device includes a stator that interfaces to a rotor whereby fluid flows through cavities between the stator and rotor that progress axially as the rotor is rotated relative to the stator. At least one of the stator and the rotor is realized from a nanocomposite that includes a polymeric matrix with carbon nanotubes dispersed therein.

Nanocomposite Moineau device

The rotor of a downhole motor includes a mandrel having at least one radial lobe, and an elastomeric tubular sleeve compressed about the mandrel so as to establish frictional engagement therebetween. The sleeve is compressed about the mandrel through one of various processes, including heat shrinking, vacuum shrinking, and stretching.

Downhole motor seal and method

A method of making a fiber optic accelerometer includes (a) drawing an optical fiber through a resin; (b) winding the resin coated fiber onto a disc mounted on an assembly having a central shaft; and (c) curing the resin-coated fiber. The optical fiber may be drawn through a resin by providing a container filled with a resin having an orifice therethrough and drawing the fiber through the orifice. The resin may be cured such that the fiber is bonded to the disc by curing the resin to the fiber and the disc at the same time.

Manufacturing method for high temperature fiber optic accelerometer

Growing community of inventors

Cheltenham, United Kingdom

Olivier Sindt