John Howard Craig

Title: John Howard Craig: Innovator in Cementing Technology

Introduction

John Howard Craig is a notable inventor based in Houston, TX, recognized for his contributions to the field of cementing technology. With a total of 2 patents, Craig has developed innovative systems that enhance the efficiency and precision of cement applications.

Latest Patents

One of Craig's latest patents is an automatic cementing system with improved density control. This system is designed to precisely control the density of a slurry during a continuously mixed cement application. It features an input water line and a dry cement hopper that supply water and cement to a mixing chamber. The mixing chamber consists of two chambers, Chamber A and Chamber B, which thoroughly mix the water and cement to create a cement slurry. Chamber B is equipped with a level sensor to monitor the slurry level. The system includes a pump for water supply, a flow meter for measuring water flow, and a slide-gate valve for regulating the dry cement supply. A discharge line with a discharge pump and flow meter is also included to manage the cement slurry output. The system controller receives operational parameters from the operator, ensuring accurate control of the slurry density throughout the process.

Career Highlights

John Howard Craig is currently employed at Stewart & Stevenson Services, Inc., where he continues to innovate in the field of cementing technology. His work has significantly impacted the efficiency of cement applications in various industries.

Collaborations

Craig has collaborated with notable colleagues, including Michael P. Dearing and Bruce A. Vicknair, contributing to advancements in their respective fields.

Conclusion

John Howard Craig's innovative work in cementing technology exemplifies the importance of precision and efficiency in industrial applications. His patents reflect a commitment to advancing the field and improving operational processes.