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Inventor

Gerald W. Crotwell

Inventor
Sugar Land, TX, US

Overview

5→
Patents
1987–2011
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 drilling100%
PatentTitleYear
8,021,081'Pull-style tensioner system for a top-tensioned riser'20117,467,914'Apparatus and method for supporting a steel catenary riser'20086,129,151'Apparatus for use in the completion of subsea wells'20005,515,917'Well apparatus'19964,651,830'Marine wellhead structure'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987Patents assigned to CAMERON IRON WORKS INC (1)· patent assignee history
1987–2011Based in Sugar Land, TX, US· patent location history
1996–2000Patents assigned to DRIL QUIP INC (2)· patent assignee history
2000Based in Sugarland, TX, US· patent location history
2008–2011Patents assigned to TECHNIP FRANCE (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DRIL QUIP INC21996–2000
TECHNIP FRANCE22008–2011
CAMERON IRON WORKS INC11987
Locations
LocationPatentsSpan
Sugar Land, Texas, US41987–2011
Sugarland, Texas, US12000