Lewis L Lacy

Title: Lewis L. Lacy: Inventor in Materials Testing and Steel Toughness

Introduction

Lewis L. Lacy is an inventor associated with The Woodlands, Texas. His patent work includes methods for evaluating material properties and assessing the heat-affected-zone toughness of steel. He is credited with 5 patents.

Latest Patents

One of Lacy’s patents, “Method for Analyzing Physical Properties of Materials,” describes a nondestructive approach to measuring changes in a sample’s dynamic Young’s modulus, density, static viscosity, compressive strength, and expansion or contraction over time. The method is designed to operate at substantially constant temperature and pressure. It highlights cement and completion gels, whose properties under downhole conditions are important to the petroleum industry.

Another patent, “Method for Determining the Relative HAZ Toughness of Steel,” presents a way to assess steel’s relative heat-affected-zone (HAZ) toughness. The method determines thermal cycles for one or more weld heat-input values, simulates the resulting HAZ, and fractures the steel to measure fracture properties. Those measurements can be used to determine midpoint transition temperatures, which are compared with a previously established standard to assess whether the steel may have low or high HAZ toughness.

Career Highlights

Lacy’s listed patent affiliations include the United States of America, as represented by the Administrator, and BJ Services Company. The subject matter of his patents connects materials testing with practical needs in petroleum operations and steel evaluation.

Collaborations

Lacy’s listed coworkers include Michael B. Robinson and Daniel B. Nisen. Their names appear among the professional connections associated with his patent record.

Conclusion

Lewis L. Lacy’s patents address methods for measuring material behavior and evaluating steel toughness, reflecting applications relevant to petroleum materials and welding.