Positive displacement motor with radially constrained rotor catch

US9982485B2 · kind B2 · utility

Inventors

• William Murray · Tomball, US
• Lance D. Underwood · Cypress, US
• Peter Thomas Cariveau · Spring, US
• Brian P. Jarvis · Bristol, GB
• Nigel Wilcox · Bristol, GB
• Brian Joseph Williams · Tigard, US
• Geoffrey C. Downton · Minchinhampton, GB
• Lawrence Lee · Houston, US
• Shun'etsu Onodera · Katy, US
• Daniel Alvarado · Houston, US
• Maxim Pushkarev · Edmonton, CA
• Gokturk Tunc · Houston, US
• Andrei Plop · Lechlade, GB

Key dates

• Filing date: Nov 3, 2016
• Grant date: May 29, 2018
• Expiry date: Nov 3, 2036

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04C15/0065
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

Techniques relate to a moving cavity motor or pump, such as a mud motor, including 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, where the apparatus for constraining is operable with the rotor catch. The motor may include a top sub, power section having a progressive cavity motor with a stator and rotor, a rotor catch, and an apparatus between a proximal and distal end of the rotor catch shaft. The apparatus may constrain the radial and/or tangential movement of the rotor catch shaft and the rotor.