LexDanaLexDanabeta
Inventor

Menglei MA

Inventor
CN

Overview

1→
Patents
2024
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 1 as inventor

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

E21Bprimary
E21BEarth or rock drilling33%
F15BSystems acting by means of fluids in general33%
G05DSystems for controlling or regulating non-electric variables33%
PatentTitleYear
12,000,222Pressure compensation device with accumulator group for controlled pressure drilling2024

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2024Patents assigned to CHINA NAT PETROLEUM CORP (1)· patent assignee history
2024Patents assigned to CNPC BOHAI DRILING ENGINEERING COMPANY LTD (1)· patent assignee history
2024Patents assigned to UNIV CHINA PETROLEUM EAST CHINA (1)· patent assignee history
2024Based in CN· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CHINA NAT PETROLEUM CORP12024
CNPC BOHAI DRILING ENGINEERING COMPANY LTD12024
UNIV CHINA PETROLEUM EAST CHINA12024
Locations
LocationPatentsSpan
CN12024