Device for efficient energy transfer and damping of impact drill

Details Device for efficient energy transfer and damping of impact drill Device for efficient energy transfer and damping of impact drill

1990-02-08

1991-02-19

Dang, Hoang C.

Boring or penetrating the earth

With above-ground means to impact an earth-penetrating means

173105, 173131, 173139, 175162, 175173, 175189, E21B 102, E21B 600

Patent

active

049935046

ABSTRACT:
Device in impact machines. The device comprises a first chamber (5) which is connected to an accumlator (6) and the pressure of which is used to hold together a set of rods (2) forming part of the drill tool. Furthermore there is a second chamber (7) to damp the recoil from the set of rods.

REFERENCES:
patent: 3356166 (1967-12-01), Diachenko
patent: 4068727 (1978-01-01), Andersson et al.
patent: 4314613 (1982-02-01), Kuhn
patent: 4387775 (1983-06-01), Adolfsson et al.
patent: 4593768 (1986-06-01), Eklof
patent: 4871035 (1989-10-01), Ekwall

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