Device for generating sound pulses inside a well, by percussion

Details Device for generating sound pulses inside a well, by percussion Device for generating sound pulses inside a well, by percussion

1985-01-23

1987-03-10

Jordan, Charles T.

Acoustics

Geophysical or subsurface exploration

Well logging

181119, 367 25, 367143, 367911, G01V 100, G01V 104, G01V 140

Patent

active

046484787

ABSTRACT:
A device for generating sound pulses in a well by a mobile mass striking against a target element integral with an elongate body anchored in a well by retractable shoes actuated by hydraulic cylinders. The mobile mass which slides in a first chamber in the body is moved away by a piston moving in a second chamber of the body and intermittently locked in the moved away position by a valve. The piston, the valve and also the hydraulic cylinders acting on the anchorage shoes are actuated by a hydraulic system which may be remote controlled from the surface.

REFERENCES:
patent: 3209854 (1965-10-01), Williams
patent: 3408622 (1968-10-01), Cox
patent: 3777814 (1973-12-01), Gustavson et al.
patent: 3858167 (1974-12-01), Stas et al.
patent: 3990297 (1975-09-01), Pelet et al.
patent: 4394754 (1983-07-01), Waters

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