Graeme Thomas Marr

Title: Graeme Thomas Marr: Innovator in Downhole Tool Technology

Introduction

Graeme Thomas Marr is a notable inventor based in Aberdeenshire, GB. He has made significant contributions to the field of downhole tool technology, holding a total of six patents. His innovative designs have enhanced the efficiency and reliability of tools used in wellbore operations.

Latest Patents

One of Marr's latest patents is the "Downhole Setting Tool with Dual Hydraulic Release." This downhole tool features a mandrel and a lower sleeve that is partially positioned within the mandrel. The lower sleeve defines a first seat designed to receive a first impediment, which triggers a primary hydraulic release of the downhole tool from a second downhole tool in a wellbore. Additionally, the tool includes an upper sleeve that also defines a second seat for a second impediment. This upper sleeve is designed to move downward in response to the second impediment, activating a secondary hydraulic release if the primary release fails.

Another significant patent is the "Stop Collar." This device can be fixedly mounted on a liner or other tubular member. The stop collar consists of a first sleeve and a second sleeve that extend around the outer circumference of the tubular member and are engaged by threaded connections. The sleeves provide opposing inner thrust surfaces, and a radially expandable gripping member is positioned between these surfaces. By rotating the sleeves, the thrust surfaces bear on the gripping member, expanding it radially inward into frictional engagement with the tubular member.

Career Highlights

Throughout his career, Graeme Marr has worked with prominent companies in the oilfield industry, including Weatherford and Tercel Oilfield Products USA LLC. His experience in these organizations has allowed him to develop and refine his innovative ideas in downhole technology.

Collaborations

Marr has collaborated with several professionals in his field, including Mark Davies and Paul David Howlett. These partnerships have contributed to the advancement of his inventions and the successful implementation of his patented technologies.

Conclusion

Graeme Thomas Marr is a distinguished inventor whose work in downhole tool technology has made a significant impact on the industry. His innovative patents and collaborations reflect his commitment to enhancing the efficiency and reliability of oilfield operations.