Double guided mud pulse valve

Details Double guided mud pulse valve Double guided mud pulse valve

1990-08-09

1991-08-13

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Wellbore telemetering

Through well fluids

G01V 140

Patent

active

050401556

ABSTRACT:
The present invention discloses a double guided slide valve apparatus for producing pressure pulses in drilling mud medium flowing through a drill string casing.

REFERENCES:
patent: 3958217 (1976-05-01), Spinnler
patent: 4641289 (1987-03-01), Jurgens
patent: 4742498 (1988-05-01), Barron
patent: 4802150 (1989-01-01), Russell et al.
patent: 4901290 (1990-02-01), Feld et al.
patent: 4905778 (1990-03-01), Jurgens

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