The H type safety joint , which is installed on the position required for subsurface drill stem and can bear in fishing operation all kinds of loads for pulling or pressing and used to transmit torque , is a subsurface safety equipment. In down hole operation, in case of being needed ,the safety joint is easy to be discharged off so as to take out the drill stem above it .It is easy to butt the safety joint to go on fishing operation when running in hole again .
Technical parameters and specifications
| Type |
O.D.(mm) |
Thread connection |
I.D.(mm) |
Max working
pull load(KN) |
Max working
torque (KN・m) |
| AH-105 |
105 |
NC31(2 7/8IF) |
38 |
1340 |
12.70 |
| AH-121(127) |
121(127) |
NC38(3 1/2IF) |
38 |
1400 |
17.65 |
| AH-156 |
156 |
NC50(4 1/2IF) |
54 |
1500 |
35.00 |
| AH-159 |
159 |
NC50(4 1/2IF) |
70 |
1600 |
35.00 |
| AH-178 |
178 |
5 1/2FH |
76 |
2000 |
40.00 |
| AH-203 |
203 |
6 5/8REG |
76 |
2500 |
44.00 | |
