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The product name:SAFETY JOINT

1.      Application

The safety joint is a special-purpose joint that is connected to the working pipe column during drilling, workover, testing, washing, fracturing, acidizing, etc. When the column is working normally, it can withstand the tension, compression and impact loads to ensure the pipe column unblocked. When the pipe column is stuck, first it can be disengaged from the safety joint, pull out the pipe column above the joint, and then process the lower pipe column and simplify the next step.

2.      Structural Principle:

The tool mainly consists of upper joint, rubber ring, lower joint and safety nail.

The safety joint is connected to the pipe string. When it is used normally, the load such as pressure is transmitted to the lower joint to realize the continuity of the pipe string. When the tool or column is stuck, the pipe column will be lifted with a certain hanging weight (the greatness is determined by the depth of the safety joint), and then the pipe string is turned forward, and the jacket nail is cut or the pipe string is lifted to cut off the safety nail. Take out the upper column and carry out other operations.

3.      Main Technical Parameters:

Max outer diameter of Steel body      110mm

Sealing pressure                    25MPa

Total tool length                    350mm

Carrying capacity                   ≥400 KN

Min diameter                       62mm

4. Operation Method

l  Check the surface of the tool for damage, and whether the thread and the diameter meet the requirements, and the joint should be greased;

l  Connect the column to the well and make record of the hanging weight;

l  When it is necessary to unload, slightly raise the pipe string to the original hanging weight, turn the pipe string forward on the ground, and observe the weight meter. It means the safety joint has been unloaded if the suspension weight drops suddenly.

Note: When connecting the safety joint to the pipe string, the upper and lower joints should be respectively connected to the pipe string to avoid forward and reverse.

Copyright(C) Shandong leiqiang machinery manufacturing Shandong leiqiang machinery manufacturing co. LTD 2018-2019 Registration number: lu ICP, 00000000