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Inventor

Robert O. Lilley

Inventor
Aberdeen, GB

Overview

5→
Patents
1988–2000
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 5 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

E21Bprimary
E21BEarth or rock drilling67%
F16HGearing17%
Y10TTechnical subjects covered by former us classification17%
PatentTitleYear
6,076,605'Horizontal tree block for subsea wellhead and completion method'20005,971,077'Insert tree'19995,503,230'Concentric tubing hanger'19964,848,457'Annulus sliding sleeve valve'19894,771,646'Rotating and indexing mechanism'1988

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988–1996Patents assigned to VETCO GRAY INC (3)· patent assignee history
1988–1996Based in Aberdeen, GB· patent location history
1999–2000Patents assigned to VETCO GRAY INC ABB (2)· patent assignee history
1999–2000Based in Farno, IT· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
VETCO GRAY INC31988–1996
VETCO GRAY INC ABB21999–2000
Locations
LocationPatentsSpan
Aberdeen, GB31988–1996
Farno, IT21999–2000