Boring or penetrating the earth – With below-ground tool drive prime mover – With means to anchor prime movers support to bore wall
Patent
1984-08-02
1985-12-17
Watkins, Donald
Boring or penetrating the earth
With below-ground tool drive prime mover
With means to anchor prime movers support to bore wall
1510405, 175103, 2541344, B65H 5900, E21B 4300, E21C 2916, H02G 108
Patent
active
045587515
ABSTRACT:
Apparatus 10 for propelling equipment through a fluid-filled conduit 12, such as a pipeline or oil well tubular. The propulsion apparatus incorporates first and second elements 14,16 adapted to be moved in a first axial direction through the conduit 12 and to resist being moved in the opposite axial direction. The first and second elements 14,16 are connected by a biasing element 18 which is adapted to move the first and second elements 14,16 toward one another in response to increasing the pressure within the conduit 12 and to move the first and second elements 14,16 away from one another in response to decreasing the pressure. By cycling the pressure of the fluid within the conduit 12, the propulsion apparatus 10 propels itself through the conduit 12. In one embodiment, the first and second elements 14,16 are adapted to reverse, on operator command, the direction of permitted travel of the propulsion apparatus 10.
REFERENCES:
patent: 2518330 (1950-08-01), Jasper et al.
patent: 2974932 (1961-03-01), Xenis
patent: 3495546 (1970-02-01), Brown et al.
patent: 4113236 (1978-09-01), Neinast
patent: 4378051 (1984-03-01), Cholet et al.
Exxon Production Research Co.
Hannon Thomas R.
Phillips Richard F.
Watkins Donald
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