Kelly Bushings designed and manufactured in accordance with API 7K and other technical standards.
The loaded parts are made of good-quality alloy steel.
|
odel
|
Type
|
Way of Drive
|
Square(in)
|
Hex(in)
|
|
HDS
|
Heavy
|
Square Drive
|
3-6
|
3-6
|
|
27-HDP
|
Pin Drive
|
3-6
|
3-6
|
|
20-HDP
|
Pin Drive
|
3-6
|
3-6
|
|
RTM4
|
Medium
|
Square Drive
|
2 1/2—5 1/4
|
3-4 1/4
|
|
20-MDP
|
Pin Drive
|
2 1/2--4 1/4
|
3-4 1/4
|
|
17-MDP
|
Pin Drive
|
2 1/2--4 1/4
|
3-4 1/4
|
|
RTS4
|
Light -duty
|
Square Drive
|
2 1/2--4 1/4
|
3-4 1/4
|