Company Filing History:
17 out of 5,942 
1 out of 832,812 Years Active: 1976-1990
Title: The Innovative Contributions of William L. Medlin
Introduction
William L. Medlin is a notable inventor based in Dallas, Texas, recognized for his significant contributions to the field of acoustic borehole logging. With a total of 18 patents to his name, Medlin has made substantial advancements in understanding subsurface formations and their properties.
Latest Patents
Among his latest patents is an innovative acoustic borehole logging system. This system employs an acoustic transmitter excited by a sweep frequency tone burst to produce an acoustic output with a free-field frequency spectrum that includes at least one resonant frequency of vibration. A closely-spaced acoustic receiver detects a borehole frequency spectrum that represents the acoustic transmitter's free-field frequency spectrum, altered by the properties of the subsurface formulation materials comprising the borehole wall. The detected borehole frequency spectrum is recorded in correlation with depth, serving as a log of the material properties of the subsurface formations surrounding the borehole.
Another significant patent involves a method for determining earth stresses in formations surrounding a cased well. In this method, an acoustic logging tool traverses a fluid-filled cased well using a monopole acoustic energy source. The pressure waves generated by the source create symmetric tube waves in the well casing adjacent to the source. At least one spaced-apart receiver detects these tube waves after they have traveled through the well casing. The asymmetry imparted to the tube waves as they travel along the well casing, influenced by the maximum and minimum earth stresses behind the well casing, is identified and used to predict the azimuthal direction of subsequent hydraulic fractures.
Career Highlights
Throughout his career, William L. Medlin has worked with prominent companies, including Mobil Oil Corporation. His work has significantly impacted the field of acoustic logging and subsurface analysis.
Collaborations
Medlin has collaborated with notable individuals in his field, including Lucien Masse and James H. Sexton. Their combined expertise has contributed to the advancements in acoustic technologies and methodologies.
Conclusion
William L. Medlin's innovative work in acoustic borehole logging and earth stress determination showcases his dedication to advancing technology in subsurface analysis. His contributions continue to influence the industry and pave the way for future innovations.