SPINDLE OF DOWNHOLE MOTOR Russian patent published in 2003 - IPC

Abstract RU 2206695 C1

FIELD: drilling equipment, drilling of oil and gas wells. SUBSTANCE: spindle has body, hollow shaft, radial and axial supports, sleeve coupling with windows for passage of flushing fluid through hollow shaft, upper sub and nipple. Hollow shaft is mounted in body for movement along axis. It also has hydraulic rest with repelling chamfer put on sleeve coupling beneath windows for passage of flushing fluid, is fitted with ring seals placed in recesses in body and nipple. Radial and axial supports are installed beneath hydraulic rest and are positioned between ring seals. EFFECT: reduced leak of flushing fluid into bearing units of spindle, decreased friction factor, prevented cracking and premature destruction of balls in axial supports. 4 cl, 1 dwg

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RU 2 206 695 C1

Authors

Shchelkonogov G.A.

Dates

2003-06-20Published

2001-11-15Filed