| http://www.hexinoil.com/Ch/Service.asp?ID=25
和信开发的反井钻杆，包括滚刀钻头，矿山开采中钻进通风井、排水井、溜井、充填井、提升井及水电站的压力管道竖井，
钻孔直径从 3m 至 7.5 m 不等。
我们提供全套项目管理专业技术——从勘探阶段钻探到生产。我们专门的内部设计、生产、培训和维护能力，可为我们的
客户量身定制符合具体条件和钻探需求的解决方案。
公司还在许多新兴市场提供土木工程应用领域的钻探服务。
我们的反井钻杆与其它传统钻探方法相比，具有降低成本、提高速度和安全等优点。
|
Industrial
|
Dimension
|
DI-22
|
Total length(Ref.)
|
Weigth(Ref.)
|
|
in
|
mm
|
in
|
mm
|
in
|
in
|
mm
|
pounds
|
kg
|
|
8
|
203.2
|
8-5/8
|
168.3
|
6-3/4
|
53-1/2
|
1,360
|
480
|
220
|
|
10
|
254.0
|
8
|
203.2
|
8-1/4
|
65-7/8
|
1,673
|
960
|
440
|
|
11-1/4
|
285.8
|
9
|
228.6
|
9-1/4
|
66-3/8
|
1,686
|
1,230
|
560
|
|
12-7/8
|
327.0
|
10-1/2
|
266.7
|
10-1/2
|
68
|
1,730
|
1,410
|
640
|
|
Industrial Diameter
|
HEXIN
|
Shoulder to
|
|
|
A
|
B
|
C
|
D
|
|
in
|
mm
|
in
|
mm
|
in
|
mm
|
in
|
mm
|
in
|
mm
|
|
8
|
203.2
|
8-1/4
|
209.8
|
48
|
1,219.2
|
3-3/4
|
95.3
|
6-5/32
|
156.4
|
|
10
|
254.0
|
10 1/4
|
260.4
|
60
|
1,524.0
|
4
|
101.6
|
7-7/16
|
188.9
|
|
11-1/4
|
285.8
|
11-1/2
|
292.1
|
60
|
1,524.0
|
4-3/4
|
120.7
|
7-11/16
|
195.3
|
|
12-7/8
|
327.0
|
12-7/8
|
327.0
|
60
|
1,524.0
|
5-7/16
|
138.1
|
9
|
228.6
|
|
E
|
F
|
G
|
H
|
I
|
|
in
|
Mm
|
in
|
mm
|
in
|
mm
|
in
|
mm
|
in
|
mm
|
|
22
|
558.8
|
1-1/2
|
38.1
|
2-3/4
|
69.8
|
8-1/4
|
209.6
|
5-1/2
|
139.7
|
|
30
|
762.0
|
1-1/2
|
38.1
|
2-3/4
|
69.8
|
8-1/4
|
209.6
|
5-7/8
|
149.2
|
|
30
|
762.0
|
1-1/2
|
38.1
|
3-1/2
|
88.9
|
10
|
254.0
|
6-3/8
|
161.9
|
|
30
|
762.0
|
1-9/16
|
39.7
|
3-15/16
|
100.0
|
11
|
279.4
|
8
|
203.2
|
严格按照ISO 9001：2008标准设计与制造
|
