LexDanaLexDanabeta
Inventor

Guomin Yan

Inventor
Shandong, CN

Overview

2→
Patents
2017
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 2 as inventor

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

E21Bprimary
E21BEarth or rock drilling100%
PatentTitleYear
9,631,450'Surface layer conductor running tool for deep-water well drilling'20179,605,499'Subsea wellhead pressure indicating and automatic adjusting device for deep-water dual-gradient drilling'2017

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2017Patents assigned to UNIV CHINA PETROLEUM EAST CHINA (2)· patent assignee history
2017Based in Shandong, CN· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
UNIV CHINA PETROLEUM EAST CHINA22017
Locations
LocationPatentsSpan
Shandong, CN22017