| |
 |
|
Class Information
Number: 367/34
Name: Communications, electrical: acoustic wave systems and devices > Seismic prospecting > Well logging > Received signal cycle discrimination
Description: Subject matter wherein particular cycles of the received signals are analyzed or processed to provide particular information or improved signal-to-noise response.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7423930 |
Methods and systems for detecting arrivals of interest |
Sep. 9, 2008 |
| 6920083 |
Method intended for detection and automatic classification, according to various selection criteria, of seismic events in an underground formation |
Jul. 19, 2005 |
| 6837332 |
Method and apparatus for cancellation of unwanted signals in MWD acoustic tools |
Jan. 4, 2005 |
| 6643220 |
Vapor handling in printing |
Nov. 4, 2003 |
| 6630890 |
Methods, systems and tools for borehole logging |
Oct. 7, 2003 |
| 6618322 |
Method and apparatus for measuring acoustic mud velocity and acoustic caliper |
Sep. 9, 2003 |
| 5780784 |
Cancellation of tool mode signal from combined signal |
Jul. 14, 1998 |
| 5724308 |
Programmable acoustic borehole logging |
Mar. 3, 1998 |
| 5654938 |
Method for identifying alteration of earth formations using dipole acoustic logging |
Aug. 5, 1997 |
| 5541890 |
Method for predictive signal processing for wireline acoustic array logging tools |
Jul. 30, 1996 |
| 5502686 |
Method and apparatus for imaging a borehole sidewall |
Mar. 26, 1996 |
| RE34975 |
Ultrasonic measurement apparatus |
Jun. 20, 1995 |
| 5289433 |
Acoustic multi-mode wide-band logging device |
Feb. 22, 1994 |
| 5278805 |
Sonic well logging methods and apparatus utilizing dispersive wave processing |
Jan. 11, 1994 |
| 5226017 |
Method and apparatus for acquiring borehole seismic data in two opposite directions |
Jul. 6, 1993 |
| 5159578 |
Apparatus for rotating a transducer assembly of a borehole logging tool in a deviated borehole |
Oct. 27, 1992 |
| 5159577 |
Technique for reducing whirling of a drill string |
Oct. 27, 1992 |
| 5130950 |
Ultrasonic measurement apparatus |
Jul. 14, 1992 |
| 5124952 |
Formation fracture detection using instantaneous characteristics of sonic waveforms |
Jun. 23, 1992 |
| 5058077 |
Compensation technique for eccentered MWD sensors |
Oct. 15, 1991 |
| 5010527 |
Method for determining the depth of a hydraulic fracture zone in the earth |
Apr. 23, 1991 |
| 4985873 |
Method and apparatus for determining compressional first arrival times from waveform threshold crossings provided by apparatus disposed in a sonic well tool |
Jan. 15, 1991 |
| 4951266 |
Method of filtering sonic well logging data |
Aug. 21, 1990 |
| 4901289 |
System for acquiring and recording signals delivered by a set of sensors disposed in well probes |
Feb. 13, 1990 |
| 4875197 |
Method and apparatus for determining propagation velocities of elastic waves in a borehole |
Oct. 17, 1989 |
| 4817059 |
Borehole logging methods for detection and imaging of formation structural features |
Mar. 28, 1989 |
| 4703427 |
Method for evaluating the quality of cement surrounding the casing of a borehole |
Oct. 27, 1987 |
| 4531204 |
Computerized truck instrumentation system |
Jul. 23, 1985 |
| 4527260 |
Method for seismic exploration by vertical seismic profiling and installation for its implementation |
Jul. 2, 1985 |
| 4524432 |
Measurement of porosity and formation factor using slow compressional waves |
Jun. 18, 1985 |
| 4428072 |
Seismic well log display method and apparatus |
Jan. 24, 1984 |
| 4397004 |
Method for seismic exploration by vertical seismic profiling and installation for its implementation |
Aug. 2, 1983 |
| 4367541 |
Apparatus and method for determining velocity of acoustic waves in earth formations |
Jan. 4, 1983 |
| 4320470 |
Method and apparatus for acoustic well logging |
Mar. 16, 1982 |
| 4223398 |
Method for acoustic signal detection |
Sep. 16, 1980 |
| 4210967 |
Method and apparatus for determining acoustic wave parameters in well logging |
Jul. 1, 1980 |
| 4042907 |
Apparatus for preventing cycle skipping in processing acoustic well-logging signals |
Aug. 16, 1977 |
|
|
|
