Downhole electromagnetic seismic source

Details Downhole electromagnetic seismic source Downhole electromagnetic seismic source

1987-01-30

1988-06-14

Jordan, Charles T.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-refraction type

367 37, 367 57, 181106, G01V 100

Patent

active

047516887

ABSTRACT:
The present invention is a downhole seismic source capable of generating seismic forces in excess of 1000 newtons. The source produces seismic waves for seismic applications, particularly cross borehole measurements and vertical seismic profiling. Coupled with motion sensing devices, the present invention also performs as a seismic logging tool. The source is comprised of an outer housing, a means for clamping the source securely to the wellbore, and a linear electromagnetic actuator which utilizes permanent magnetic material having remanent magnetic field exceeding about 0.9 T such as rare earth permanent magnetics. The source has a diameter of about 12.5 cm to fit within a typical wellbore and the acuator has a length of about 1 meter.

REFERENCES:
patent: 2522433 (1950-09-01), Dahlberg
patent: 4214226 (1980-07-01), Narasimhan et al.
patent: 4298967 (1981-11-01), Hawkins
patent: 4394754 (1983-07-01), Waters
patent: 4627036 (1986-12-01), Wyatt
patent: 4648039 (1987-03-01), Devaney et al.
patent: 4648478 (1987-03-01), Dedole et al.
Paulsson et al., "Elastic-Wave Velocities and Attenuation in an Underground Granitic Repository for Nuclear Waste", Geophysics, vol. 50, No. 4 (Apr. 1985); pp. 551-570.

Affiliated with

Also associated with

Rating

Downhole electromagnetic seismic source does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Downhole electromagnetic seismic source, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Downhole electromagnetic seismic source will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-509351