Boring or penetrating the earth – With below-ground tool drive prime mover – Fluid rotary type
Patent
1979-09-14
1981-04-07
Purser, Ernest R.
Boring or penetrating the earth
With below-ground tool drive prime mover
Fluid rotary type
415111, 415502, E21B 402
Patent
active
042600316
ABSTRACT:
A downhole drilling motor located near the end of a rotary drill string is operated by the drilling mud for driving a rotary drill bit to drill an oil or gas well or the like. Fluid lubricated bearings are employed and a portion of the drilling fluid is diverted through the bearings of the downhole motor with the balance of the drilling fluid being discharged through ports of the drill bit. The diverted portion of the drilling fluid is transmitted along a flow path that results in an abrupt change of direction of flow. The flow path will purge a portion of the drilling fluid of unwant ed solids by diverting the solid along with the main portion of the drilling fluid through the motor and through and out of the drill bit. The entry of large contaminating solids or high-density and abrasive solids to the bearings is restricted. This prevents plugging of flow through the bearings and reduces wear in the bearings by reducing the volume of abrasive solids.
REFERENCES:
patent: 3065416 (1962-11-01), Jeter
patent: 3401758 (1968-09-01), Talbert
patent: 3456746 (1969-07-01), Garrison et al.
patent: 3516718 (1970-06-01), Garrison et al.
patent: 3666329 (1972-05-01), Bell
patent: 3788408 (1974-01-01), Dysart
patent: 3936247 (1976-02-01), Tschirky et al.
patent: 3982859 (1976-09-01), Tschirky et al.
patent: 4029368 (1977-06-01), Tschirky et al.
Dresser Industries Inc.
Purser Ernest R.
Scott Eddie E.
Winans Fred A.
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