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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):
E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01B - MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
DOE Contract Number:  
NA0003525
Resource Type:
Patent
Resource Relation:
Patent File Date: 10/05/2018
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

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:

Percussive rotational impact hammer
patent, August 2003


Linear motion power cylinder
patent, September 1989


Percussion Drilling Tool
patent, October 1971


Rock Drill
patent, June 1937


Drive system
patent, August 2008


Harmonic drive linear actuator
patent, May 2009


Compound Axial Torsional Hydraulic Actuator
patent, October 1973


Rotary actuator
patent, June 1997


Rock Drill
patent, October 1962


Pressure Fluid Motor
patent, August 1936