Downhole fluid motor composite torque shaft

US5363929A · kind A · utility

Assignee

• Conoco Inc. · US

Inventors

• Jerry G. Williams · Diemelstraße, US
• Monib M. Monib · Newark, US
• Mamdouh M. Salama · Ponca City, US
• David H. Schwartz · Katy, US
• Edward G. Dew · Kyle, US

Key dates

• Filing date: Jul 1, 1992
• Grant date: Nov 15, 1994
• Expiry date: Jul 1, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/1369
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

This invention relates to a composite torque shaft for connecting a downhole fluid motor to the drill bit at the end of a drill string. The composite torque shaft comprises an elongate matrix body with oriented fibers fixed therein. The fibers are particularly oriented to provide the composite torque shaft with significant torque strength and stiffness while allowing bending flexibility. Accordingly, the composite torque shaft converts the gyrating and rotating motion of the rotor in the fluid motor to the pure rotation of the drill bit.