序号

Organization

Patents

1

China National Petroleum Corporation

152

2

Schlumberger Limited

118

3

China Petrochemical Corporation (Sinopec Group)

115

4

Halliburton Company

99

5

China University Of Petroleum

51

6

National-Oilwell Varco, Inc.

30

7

General Electric Company

29

8

China National Offshore Oil Corp

29

9

Southwest Petroleum University

26

10

Stanley Black & Decker, Inc.

16

11

Enn Coal Gasification Co Ltd

16

12

China University Of Mining And Technology

15

13

Chinese Academy Of Sciences

14

14

Enn Coal Gasification Mining Co., Ltd.

10

15

Weatherford International Ltd.

9

16

Techtronic Industries Co. Ltd.

9

17

Makita Corporation

9

18

Saudi Arabian Oil Company

9

19

Core Laboratories N.V.

8

20

EPIROC DRILLING TOOLS LLC

7