Apparatus for generating hydraulic shock waves in a well

Details Apparatus for generating hydraulic shock waves in a well Apparatus for generating hydraulic shock waves in a well

1989-12-01

1991-03-05

Novosad, Stephen J.

Wells

Processes

Placing or shifting well part

166 651, 166 63, 166249, 166177, E21B 4325

Patent

active

049970445

ABSTRACT:
Apparatus for electrically generating hydraulic shock waves in a fluid bearing formation (14) of a bore hole (10) including a tool (16) having an upper electrode (42) and a lower electrode (46) forming a spark gap therebetween. The tool (16) has an upper end portion (40) comprised of a plurality of sections (40A-40E) threaded to each other in end to end relation and an armored electrical cable (18) having an outer metal sheath (34) is anchored to the uppermost section (40A). The tool (16) is particularly adapted for fitting within a casing having a four inch diameter and the electrodes (42,46) have diverging planar end surface portions (84) coated with tungsten carbide to provide wear resistant surfaces.

REFERENCES:
patent: 1457479 (1923-06-01), Wolcott
patent: 3180418 (1965-04-01), MacLeod
patent: 4074758 (1978-02-01), Scott
patent: 4169503 (1979-10-01), Scott
patent: 4343356 (1982-08-01), Riggs et al.
patent: 4345650 (1982-08-01), Wesley
patent: 4479680 (1984-10-01), Wesley et al.

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