Generating pulses

Details Generating pulses Generating pulses

1980-05-23

1982-12-21

Moskowitz, Nelson

Acoustics

Geophysical or subsurface exploration

Seismic wave generation

181113, 367144, G01V 1137, G01V 138

Patent

active

043644465

ABSTRACT:
Methods and devices are disclosed for generating acoustic pulses in a water or land medium, e.g., for use in seismic investigations. The pulse amplitudes, waveshapes, and frequencies can be controlled by signals that may originate at a remote location. Compressed gas is confined at high pressure in a valve chamber (12, 194). An initiating signal causes the opening of a passage (54, 56, 192) from the chamber into the medium to initiate the rise of a pressure pulse therein. A second signal causes the closing of the passage in a manner such that the initial rise of the pressure pulse is limited by the closure of the passage. In one device, the passage is opened by one sleeve valve member (60) and closed by another sleeve valve member (58). In another device the passage is opened by a sleeve valve member (196) whose motion to open the passage is arrested substantially instantaneously by transferring its momentum to a momentum exchange sleeve (246) that is then gradually decelerated. The passage may be closed by the same sleeve valve member (196) whose motion to close the passage is arrested substantially instantaneously by transferring its momentum to a second momentum exchange sleeve (220) that is then gradually decelerated.

REFERENCES:
patent: 3276534 (1966-10-01), Ewing et al.
patent: 3379272 (1968-04-01), Brooks
patent: 3379273 (1968-04-01), Chelminski
patent: 3397755 (1968-08-01), Loper
patent: 3434562 (1969-08-01), Johnson
patent: 3506085 (1970-04-01), Loper
patent: 3638752 (1972-02-01), Wakefield
patent: 3653460 (1972-04-01), Chelminski
patent: 3750097 (1973-07-01), Havlik et al.
patent: 3779335 (1973-12-01), Chelminski
patent: 3997021 (1976-12-01), Chelminski
patent: 4034827 (1977-07-01), Leerskov et al.
patent: 4047591 (1977-09-01), Ward et al.
patent: 4049078 (1977-09-01), Paitson et al.
patent: 4051918 (1977-10-01), Rogers
patent: 4098369 (1978-07-01), Altschuler et al.
patent: 4114723 (1978-09-01), Paitsen et al.
patent: 4180139 (1979-12-01), Walker
patent: 4230201 (1980-10-01), Bogs
Explorations Equipment Research, Inc., Galveston, Texas, Ad. "EERI Model 3 Air Gun".

Affiliated with

Also associated with

Rating

Generating pulses does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-402375