1

ZL03230135.9

Combined Transmission Drawworks

2

ZL 03116902.3

DC Motor Energy-consumed Braking System

3

ZL200320109527.5

Aligning Device for Mast with Well Center

4

ZL200320109526.0

Integrated Substructure with Vertical Rising and DF and Mast

5

ZL200420020021.1

Continuously Raised Mast and Substructure with One Set Raising Line

6

ZL200420020022.6

Synchro-raised Organic Whole Mast and Substructure

7

ZL 02216207.0

Single Shaft Electric Drive for Light, Medium and Heavy Drilling Rig

8

ZL 01254430.2

Continuously Raising Device for the Mast and Substructure

9

ZL 032311400

DC Motor Energy-consumed Braking System

10

ZL 01253610.5

Electromechanical Integrated Rotary Table

11

ZL 01254429.9

Improved Mast and Substructure

12

ZL 01211071.x

Electro-drive DW and RT Arranged in Parallel

13

ZL 02215263.6

Energy-consumed Braking System for Drawworks Motor

14

ZL200520043338.1

Continuously Raised Mast and Substructure with One Pair of Middle Connected Raising Line

15

ZL200520043339.6

Single Shaft Drawworks with Suspended Gear Reducer

16

ZL200520046280.6

Long Service Life Mud Pump Piston

No

Accepted Patent

Accepted Patent Name

1

200820057634.0

Mechanical Drive Oil and Natural Gas Drilling Rig

2

200820057635.5

Entirely Removable Land Oil Drilling Rig

3

200820009083.0

A Kind of DP Arranging Device with Oil Drilling Rig Mast

4

200820059622.1

A Kind of Hinge-lever-type Dual Self-locking DP Tong

5

200820059624.0

A Kind of Oil Drilling Rig Emergency Hoisting and Auto-driller Driven and Operated by Hydraulic Motor

6

200820059620.2

A Kind of Buffer Device Used for DP Tong

7

200820059623.6

A Kind of T Type and Mechanical Lock Handle Control Device

8

200810038865.1

A Kind of Drawworks Single-handle Control Device

9

200820151360.1

New Type of Drilling Rig Integral Removable Device

10

200820151359.9

A Kind of Air Control and Emergency System for Drawworks

11

200820152839.7

A Kind of Fastline Lubricant Device of Dusty-proof and Graphitic Lubricant