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Title: Fluid-powered linear motor with rotary pistons and motion rectifier

Abstract

A fluid-powered linear motor with rotary pistons is disclosed. An application is for a downhole motor but it could be used in other applications. Rotational pistons provide increased torque generation as the torque generated is proportional to motor length. Since downhole drills are long (generally up to a maximum length of 30 ft.), a high-torque motor can be produced using this method. A pressurized fluid is used to drive the piston assemblies to produce bit shaft power. This concept employs rotary pistons and a mechanical rectifier to convert the rotational reciprocation produced by a reciprocating rotational piston into continuous rotary motion.

Inventors:
Issue Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1735234
Patent Number(s):
10767670
Application Number:
16/153,265
Assignee:
National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16H - GEARING
F - MECHANICAL ENGINEERING F15 - FLUID-PRESSURE ACTUATORS F15B - SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL
DOE Contract Number:  
NA0003525
Resource Type:
Patent
Resource Relation:
Patent File Date: 10/05/2018
Country of Publication:
United States
Language:
English

Citation Formats

Raymond, David W. Fluid-powered linear motor with rotary pistons and motion rectifier. United States: N. p., 2020. Web.
Raymond, David W. Fluid-powered linear motor with rotary pistons and motion rectifier. United States.
Raymond, David W. Tue . "Fluid-powered linear motor with rotary pistons and motion rectifier". United States. https://www.osti.gov/servlets/purl/1735234.
@article{osti_1735234,
title = {Fluid-powered linear motor with rotary pistons and motion rectifier},
author = {Raymond, David W.},
abstractNote = {A fluid-powered linear motor with rotary pistons is disclosed. An application is for a downhole motor but it could be used in other applications. Rotational pistons provide increased torque generation as the torque generated is proportional to motor length. Since downhole drills are long (generally up to a maximum length of 30 ft.), a high-torque motor can be produced using this method. A pressurized fluid is used to drive the piston assemblies to produce bit shaft power. This concept employs rotary pistons and a mechanical rectifier to convert the rotational reciprocation produced by a reciprocating rotational piston into continuous rotary motion.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {9}
}

Works referenced in this record:

Drive system
patent, August 2008


Rotary actuator
patent, June 1997


Harmonic drive linear actuator
patent, May 2009


Linear motion power cylinder
patent, September 1989


Fluid powered linear piston motor with harmonic coupling
patent, September 2016


Percussive rotational impact hammer
patent, August 2003