Analysis of the Causes of Drill Pipe Fracture in Horizontal Directional Drilling Machine

1. Raw material and processing of drill pipe

1. For drill pipe raw materials, users should not only consider the low price, but also distinguish the amount of pipe raw materials. Customers should purchase standard products from official manufacturers that are produced in strict accordance with international and national standards, so that the quality of steel based on Z can be guaranteed.

2. The processing quality mainly refers to the processing specification, processing button type, processing quality, processing accuracy and so on of connecting threaded buttons.

3. Whether the heat treatment process, quenching and tempering and hardening treatment meet the rules and requirements.

Engineering questions

1. The non-excavation drill pipe has been used for too long, and the surface is damaged more, approaching or exceeding the fatigue life. Replace the drill pipe with a new one in time.

2. The material and thickness of the drill pipe body do not meet the requirements of the technical specification. Please contact your supplier.

3. When expanding the hole (especially when expanding the hole) or drilling the pilot hole for a long distance, the drill bit suddenly hits a hard object to generate a strong impact. Cause non-excavation drill pipe to break or twist off. When operating the non-excavation drilling rig, the operator should reasonably control the rotation speed and propulsion force to prevent such situations from happening.

4. The radius of curvature of the construction hole exceeds the parameter of the small radius of curvature of the drill pipe to control the small radius of curvature of the construction hole.

5. Severe scratches on the surface of the drill pipe body (more than 1 mm in depth and in a spiral shape) avoid using drill pipes with scratches.

6. The torque of the Horizontal Directional Drilling Machine is greater than the torque accepted by the inclination angle of the drill pipe. Equip the drilling rig with suitable drill pipe.