Downhole motor

A downhole motor comprising:

• a housing;
• said housing having an annular inner wall and a first axially upwardly facing annular shoulder integrally formed in said housing on said inner wall and a second axially downwardly facing annular shoulder integrally formed in said housing on said inner wall,
• a stator mounted in said housing, said stator having a first stator end and a second stator end;
• a rotor rotatably mounted in said stator, said rotor having a first rotor end portion extending out of said first stator end and a second rotor end portion extending out of said second stator end;
• an output shaft rotatably mounted in said housing and operatively connected to said rotor having a first output shaft end and a second output shaft end;
• a first thrust bearing assembly in surrounding relationship to said output shaft and disposed proximal said first output shaft end, said first thrust bearing assembly having a first rotating thrust bearing rotatable with said output shaft and a first stationary thrust bearing engagable with said first rotating thrust bearing, said first stationary thrust bearing being positioned on said first shoulder;
• a second thrust bearing assembly in surrounding relationship to said output shaft and disposed proximal said second output shaft end, said second thrust bearing assembly comprising a second rotating thrust bearing, and a second stationary thrust bearing engagable with said second rotating thrust bearing, said second stationary thrust bearing positioned on said second shoulder;
• a radial bearing assembly disposed in said housing in surrounding relationship to said output shaft and between said first and second thrust bearing assemblies.

A down-hole motor comprising:

• a motor section, comprising:
• a motor housing,
• a motor shaft rotatably mounted in said motor housing;
• an output shaft section comprising:
• an output shaft housing, said output shaft housing having an annular inner wall a first axially upwardly facing annular shoulder integrally formed in said housing on said inner wall and a second axially downwardly facing annular shoulder integrally formed in said housing on said inner wall;
• an output shaft rotatably mounted in said output shaft housing, said output shaft having a first output shaft end and a second output shaft end, said first output shaft end of said output shaft being operatively connected to said motor shaft, said output shaft section further including:
• a first output shaft thrust bearing assembly in surrounding relationship to said first output shaft end proximal said first end of said output shaft, said first output shaft bearing assembly comprising a first output shaft rotating thrust bearing rotatable with said output shaft and a first output shaft stationary thrust bearing engagable with said first output shaft rotatable thrust bearing, said first output shaft stationary thrust bearing being positioned on said first shoulder;
• a second output shaft thrust bearing assembly in surrounding relationship to said output shaft proximal said second end of said output shaft, said second output shaft thrust bearing assembly comprising a second output shaft rotating thrust bearing rotatable with said output shaft and a second output shaft stationary thrust bearing engagable with said second output shaft rotating thrust bearing, said second output shaft stationary bearing being positioned on said second shoulder;
• a radial bearing assembly positioned between said first and second output shaft bearing assemblies and in surrounding relationship to said output shaft.

A down-hole motor comprising:

• a motor section, said motor section comprising:
• a motor housing, said motor housing having an annular inner wall and a first internal annular axially upwardly facing shoulder integrally formed in said housing on said inner wall and an axially spaced, second internal annular axially downwardly facing shoulder integrally formed in said housing on said inner wall;
• and
• a motor shaft rotatably mounted in said motor housing, said motor shaft having a first motor shaft end and a second motor shaft end;
• a first motor shaft thrust bearing assembly in surrounding relationship to said motor shaft proximal said first motor shaft end, said first motor shaft thrust bearing assembly comprising a first motor shaft rotatable thrust bearing rotatable with said motor shaft and a first motor shaft stationary thrust bearing positioned on said first shoulder and engagable with said first motor shaft rotatable thrust bearing;
• a second motor shaft thrust bearing assembly in surrounding relationship to said motor shaft proximal said second motor shaft end, said second motor shaft end thrust bearing assembly comprising a second motor shaft rotatable bearing rotatable with said motor shaft and a second motor shaft stationary bearing positioned on said second shoulder and engagable with said second motor shaft rotatable bearing;
• an output shaft section comprising:
• an output shaft housing
• an output shaft rotatably mounted in said output shaft housing, said output shaft having a first output shaft end and a second output shaft end, said first output shaft end of said output shaft being operatively connected to said motor shaft, said output shaft section further including:
• a first output shaft thrust bearing assembly in surrounding relationship to said first output shaft proximal said first output shaft end of said output shaft, said first output thrust bearing assembly comprising a first output shaft rotating thrust bearing rotatable with said output shaft and a first output shaft stationary thrust bearing engagable with said first output shaft rotatable thrust bearing;
• a second output shaft thrust bearing assembly in surrounding relationship to said output shaft proximal said second end of said output shaft, said second output shaft thrust bearing assembly comprising a second output shaft rotating thrust bearing rotatable said output shaft and a second output shaft stationary thrust bearing engagable with said second output shaft rotating thrust bearing;
• a radial bearing assembly positioned between said first and second output shaft bearing assemblies and in surrounding relationship to said output shaft.