Garry R Stephen

Title: Garry R. Stephen and His Wellhead Inventions.

Introduction

Garry R. Stephen is an inventor based in Aberdeen, Great Britain, whose work focuses on wellhead and casing-support technologies. His patent portfolio includes 4 patents.

Latest Patents

Stephen’s recent inventions address well completion and the secure support of casing strings.

- **Wellhead completion system.** This system uses a seal with its own load ring, lowered into a wellhead housing around a tubular member. Once positioned, the split load ring moves outward into a housing groove, and a locking assembly secures the seal. The assembly can also lock onto the upper end of casing that has been cut during an emergency stuck condition. A tubing hanger lands over the assembly and is retained by an actuating ring and lock ring that operate independently of the tubing hanger seal.

- **Casing tension retainer.** This invention supports a casing string in tension using a resilient, outwardly biased split load ring mounted on the exterior of a casing hanger. The ring is held in place while the casing is run, then released by the running tool so it can spring outward and support the load. Wickers on the ring engage matching wickers inside the wellhead housing bore.

Career Highlights

Stephen’s listed company affiliations include ABB Vetco Gray Incorporated and Vetco Gray Inc. His patent work reflects a focus on practical mechanisms for wellhead completion and casing retention.

Collaborations

Stephen’s listed coworkers include Stephen A. Cromar and Eric R. Schwelm.

Conclusion

Garry R. Stephen’s inventions address key wellhead engineering challenges, including sealing, locking, and supporting casing under tension.