Device for producing pressure pulses in an oil well fluid medium

Details Device for producing pressure pulses in an oil well fluid medium Device for producing pressure pulses in an oil well fluid medium

1988-05-09

1990-03-06

Kisliuk, Bruce M.

Boring or penetrating the earth

With means movable relative to tool below ground to stop...

166320, 367 83, 367 85, G01V 140, E21B 2110, E21B 4712

Patent

active

049057782

ABSTRACT:
An apparatus for producing pressure pulses in an oil well fluid medium is established which includes a main valve member moveable relative to a supporting member by a pressure gradient between two flow channels. The main valve body is longitudinally moveable relative to the supporting body, and a gap is provided between the two bodies. The gap is opened for fluid flow which prevents the development of dead water zones and the buildup of sedimentary deposits to prevent restriction of movement between the two bodies. The gap includes one or more throttle zones to assist in maintaining the necessary gradient between the two flow channels.

REFERENCES:
patent: Re29734 (1978-08-01), Manning
patent: 3764969 (1973-10-01), Cubberly, Jr.
patent: 3764970 (1973-10-01), Manning
patent: 3958217 (1976-05-01), Spinnler
patent: 4641289 (1987-02-01), Jurgens

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