一、 简介 General:
安全卡瓦适用于石油、天然气钻井作业中上扣或卸扣时，防止钻具下滑的工具，可通过调整牙板套环节数改变卡持管径范围。
The safety clamps are designed for coupling and uncoupling in oil natural gas drilling operation. It can prevent the drill tools from slipping down. When changing the working range, it is only necessary to adjust the No. of chain link s.
二、 主要技术参数 Main technical parameters:
|
型 号
Type
|
扣 合 管 径
Pipe 0.D.(in)
|
链 节 数
No. of Chain
|
|
T
|
1 1/8-2
|
4
|
|
2 1/8- 3 1/4
|
5
|
|
|
3 1/2-4 1/2
|
6
|
|
|
C
|
3 1/2-4 5/8
|
7
|
|
4 1/2-5 5/8
|
8
|
|
|
5 1/2-6 5/8
|
9
|
|
|
6 1/2-7 5/8
|
10
|
|
|
7 1/2-8 5/8
|
11
|
|
|
8 1/2-9 5/8
|
12
|
|
|
9 1/2-10 5/8
|
13
|
|
|
10 1/2-11 5/8
|
14
|
|
|
11 1/2-12 5/8
|
15
|
|
|
12 1/2-13 5/8
|
16
|
|
|
13 1/2-14 5/8
|
17
|
|
|
14 1/2-15 5/8
|
18
|
