Schlumberger Technology Corporation

Extreme Engineering Ltd.

Timothy Neff

Derek W Logan

Anthony Robert Dopf

Paul L Camwell

Wendall Siemens

Trang Le

Dave Switzer

A brush and brush housing arrangement for use with an electric brushed motor containing viscous fluid. The brush and brush housing arrangement comprises a brush housing and at least one brush. The at least one brush comprising a first end that is in contact with a rotating commutator of the motor when in use and an opposed second end. At least one open-faced channel in a surface of the brush extends from the first end to the second end. The open-faced channel provides an exit for entrained fluid from the brush and brush housing, minimizing or eliminating brush lift caused by fluid being forced between the rotating commutator and the brush. Additional pressure relief channels for allowing escape of entrained fluid may be located in the housing.

Brush and brush housing arrangement to mitigate hydrodynamic brush lift in fluid-immersed electric motors

A shaft protection washer to protect a rotating shaft in a 'measurement while drilling' (MWD) tool. Use of the shaft protection washer renders the rotating shaft less susceptible to erosion from the drilling fluid flowing between the rotating component and the stationary component.

Fluid erosion protection washer for rotating shaft in MWD tool

A direct current electric motor brush and brush housing arrangement which significantly reduces the effect of brush lift in a brushed motor containing viscous fluid. The brush housing enables viscous fluid to avoid momentum transfer into the brushes by providing two or more pressure relief channels that provide the fluid with direct radial exits along the direction of the brush, potentially reducing the brush lift due to the fluid being forced between a rotating commutator and its associated brushes. The pressure relief channels may be located in the housing immediately adjacent to the brush, being radially disposed to the leading face (or leading and trailing faces) of each brush, or in the leading face (or leading and trailing faces) of each brush itself, and may include additional channels in the housing near but not immediately adjacent the brushes.

Growing community of inventors

Calgary, Canada

Timothy Neff