Company Filing History:
7 out of 36 
7 out of 832,812 Years Active: 1977-1994
Title: Innovations by Lawrence Sanford in Subterranean Fluid Sampling
Introduction
Lawrence Sanford is a notable inventor based in Houston, TX, with a remarkable portfolio of 14 patents. His work primarily focuses on improving methods and apparatus for obtaining subterranean fluid samples, which is crucial for various applications, including environmental testing and nuclear migration studies.
Latest Patents
One of Sanford's latest patents is an apparatus designed for obtaining subterranean fluid samples. This invention provides improved methods for collecting multiple fluid samples from subterranean formations of interest. The apparatus is particularly well-suited for testing nuclear migration in groundwater, utilizing test wells surrounding a nuclear test site. The design includes a plurality of flow ports in the casing, each positioned at a depth of a formation of interest, with a sliding sleeve over each port. A wireline tool is lowered to the selected depth, where a downhole electric motor powers a pump to move a first dog radially outward. The tool can be axially moved until the first dog locks into a groove in the casing, sealing the fluid entering the casing above and below the sliding sleeve. Fluid pressure is then applied to engage a second dog, allowing the sliding sleeve to open the port. The fluid can be tested by a downhole tester, with signals transmitted to the surface. If the fluid is representative of the downhole fluid, it is passed to a chamber within the downhole tool for retrieval. This innovative procedure allows for the reliable collection of multiple fluid samples at selected depths with a single wireline run, significantly reducing costs.
Career Highlights
Throughout his career, Sanford has made significant contributions to the field of subterranean fluid sampling. His inventions have enhanced the efficiency and reliability of fluid sample collection, which is vital for environmental monitoring and research.
Collaborations
Sanford has collaborated with notable professionals in his field, including Charles O. Stokley and Ronald A. Jordan. These collaborations have likely contributed to the advancement of his innovative work.
Conclusion
Lawrence Sanford's contributions to the field of subterranean fluid sampling through his innovative patents have made a significant impact on environmental testing and research. His work continues to influence the industry and improve methodologies for fluid sample collection.