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Do you know the cause of drill pipe fracture?

Aug 19 , 2019

Do you know the cause of drill pipe fracture?

Drill Pipe supplier China shares that the drill pipe is a screw tube with a leading screw used to connect the surface equipment of the rig to the drilling and grinding equipment or bottom hole device at the bottom of the well. The purpose of the drill pipe is to transport the drilling mud to the bit and, together with the bit, raise, lower or rotate the bottom hole device. The drill pipe must be able to withstand great internal and external pressure, distortion, bending and vibration. In the process of oil and gas exploitation and refining, drill pipe can be used many times.

As for the common reasons of drill pipe fracture, please refer to the following points:

1. Trenchless drill pipe for sale has been used for a long time with many surface damage, which is close to or beyond the fatigue life. Replace new drill pipe in time.

2. The material and thickness of the drill pipe body do not meet the requirements of the technical specifications.

3. When reaming or drilling guide holes for a long distance, the drill bit suddenly encounters a hard object and produces a strong impact force. Causes sudden increase of torque and causes the trenchless drill pipe to break or twist. When operating trenchless drilling rig, the operator should reasonably control the rotation speed and propulsion to avoid this kind of situation. Drilling and pressurizing should be carried out at an appropriate rotation speed.


Drill Pipe supplier China

Drill Pipe


4. The minimum radius of curvature of the construction hole is controlled by the parameter that the radius of curvature of the construction hole exceeds the minimum radius of curvature of the drill pipe.

5. If the surface of Heavy duty drill pipe body is seriously scratched, avoid using the drill pipe with scars.

6. The torque of the drill is greater than the torque borne by the inclination Angle of the drill pipe. Equip the rig with proper drill pipe.

7. the hole position. Do not form the operation of the drill pipe, but be careful not to "don't" the drill pipe.

8. Drilling. Under the action of gravity of drill pipe and drill tool, the process of realizing drill pipe extension by overcoming the friction force of hole wall and the buoyancy of mud is called drilling release. The correct sequence of drilling is: the outer rod is lowered in place, and the adjacent inner rod starts to extend from the outer rod, from the outside to the inside, and is completed one by one.

Drill pipe is the basic component of drill string. Its main role is to transfer torque and drilling fluid, and to deepen the hole by gradually lengthening the drill pipe. Therefore, drill pipe plays a very important role in oil drilling.


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  • Add: Tongda Road, Baotou Equipment Manufacturing Industry Park, Qingshan District, Baotou City, Inner Mongolia, China.

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