Down-hole devices for imparting rotary motion

Details Down-hole devices for imparting rotary motion Down-hole devices for imparting rotary motion

1985-09-24

1987-12-22

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

With shaft connected fluid force subjected thrust balancing...

Motor shaft

415185, 415501, E21B 402

Patent

active

047144033

ABSTRACT:
A down-hole signal transmitter includes an annular impeller mounted on a cylindrical casing and arranged to be driven by the mud flow passing along a drill string, and an annular stator fixed to the casing upstream of the impeller. The stator has blades canted in one sense relative to the mud flow direction, whereas the impeller has blades parallel to the mud flow direction. The stator blades thereby cause the mud flow to impact on the impeller blades at such an angle that a small or negligible thrust results at the impeller bearings. It is therefore possible to insure a long service life for the bearings.

REFERENCES:
patent: 1878747 (1932-09-01), Youngblood
patent: 2592519 (1952-04-01), Postlewaite
patent: 2800296 (1957-07-01), Hatch et al.
patent: 4245473 (1981-01-01), Sandoval
patent: 4265323 (1981-05-01), Juergens

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