John D Parrish

Title: John D Parrish: Innovator in Rock Bit Technology

Introduction

John D Parrish is a notable inventor based in Houston, TX (US), recognized for his contributions to the field of rock bit technology. With a total of 3 patents, Parrish has developed innovative methods and products that enhance the efficiency and accuracy of drilling operations.

Latest Patents

One of his latest patents is a rock bit manufacturing method. This method involves creating a rock bit from previously formed lugs that are welded together to form a body. Initially, drilled holes are formed on the lug to serve as a shank end positioner. These lugs are then positioned on a mating receiver, such as dowels in a fixture. The bearing end of the lug is clamped against a locator block to establish a predetermined relationship between the shank end and the bearing end of the lug. This relationship is crucial as it determines the radial, axial, and angular positions of both ends. The faces of the lug are machined while held in this precise alignment, resulting in a bit of exceptional accuracy produced in a cost-effective manner. Additionally, a slightly different position of the locator block allows for the use of lugs with normal forging tolerances, enabling the production of bits of various sizes.

Another significant invention by Parrish is a large diameter oil well drilling bit. This invention features a unique cast body that secures multiple cutting assemblies, which include a leg, a bearing journal, and a rolling cutter mounted on the bearing journal. This innovative design enhances the performance and durability of drilling operations.

Career Highlights

Throughout his career, John D Parrish has worked with reputable companies such as Reed Rock Bit Company and Reed Tool Company. His experience in these organizations has contributed to his expertise in rock bit technology and manufacturing processes.

Collaborations

Parrish has collaborated with notable individuals in the industry, including Terry H Mayo and Rodney A Bellamy. These collaborations have likely influenced his innovative approaches and advancements in rock bit technology.

Conclusion

John D Parrish stands out as an influential inventor in the field of rock bit technology. His innovative patents and career achievements reflect his commitment to enhancing drilling efficiency and accuracy. His contributions continue to impact the industry positively.