Boring or penetrating the earth – Processes
Patent
1997-08-13
2000-01-18
Neuder, William
Boring or penetrating the earth
Processes
175100, 175 94, 166178, E21B 708
Patent
active
060150181
ABSTRACT:
An apparatus for creating a pulling force on a bottom hole assembly contained within a bore hole is disclosed. Generally, the apparatus comprises a housing, a piston having a first section and a second section, and a venturi member, operatively associated with the piston, adapted for creating a zone of low pressure. In one embodiment, the housing is attached to a work string and the piston is attached to a bottom hole assembly. The first section of the piston and the housing forms a first chamber. The second section of the piston and the housing forms a second chamber. The venturi member contains a first passageway for communicating the zone of low pressure created by the venturi member with the first chamber; and a second passageway for communicating the inner diameter of the venturi means with the second chamber. In the preferred embodiment, the venturi member comprises a nozzle operatively associated with the piston; a mixing tube, formed on the inner diameter of the piston; and, a diffuser section adjoining the mixing tube. A method of moving a piston in a down hole environment is also disclosed.
REFERENCES:
patent: 4106571 (1978-08-01), Stone
patent: 4697651 (1987-10-01), Dellinger
patent: 4705118 (1987-11-01), Ennis
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