National Oilwell Varco, L.p.

Alan H Kitching

Alan Martyn Eddison

James Robert Streater

Russell C Gilleylen

Deepthi Raj Setlur

Haresh Ghansyam

Derek James Stuart

Shiran Waas

Murray Gilbertson

Russell Gilleylen

James R Streater

A downhole tool comprises a housing having a longitudinal bore and an agitator assembly disposed within the longitudinal bore of the housing. A removable component is disposed within the longitudinal bore and can be removed from the housing so as to at least partially open the longitudinal bore.

Downhole pulse generating device for through-bore operations

A rotor for a progressive cavity device has a central axis and includes an outer tubular. The outer tubular has a radially outer surface and a radially inner surface defining a rotor cavity. The outer surface includes at least one helical rotor lobe. The rotor also includes a filler structure disposed within the rotor cavity. The outer tubular is made of a first material having a first density and the filler structure is made of a second material having a second density that is less than the first density.

Lightweight and flexible rotors for positive displacement devices

A pulse generator comprises a stator coupled to a housing and a rotor that is rotatably disposed within the housing. An annulus is formed between the rotor and the stator. An inner bore is formed through the rotor. One or more outer flow ports provide fluid communication between the annulus and the inner bore. A retrievable valve assembly is rotationally coupled to the rotor and at least partially disposed within the inner bore. The retrievable valve assembly includes a rotary valve member having one or more primary flow ports. A fluid flow path is periodically formed by the one or more outer flow ports, the annulus, and the one or more primary flow ports as the rotor rotates.

Downhole pulse generating device

Growing community of inventors

Katy, TX, United States of America

Alan H Kitching