company news about How to use drill pipe and matters needing attention

1. According to the torque, push-pull force and allowable minimum curvature radius of the drilling rig, select the drill pipe of the appropriate specification and model.

2. Avoid connecting large-diameter drill pipes to small-diameter drill pipes during construction (ie, mixed use of large and small drill pipes) to prevent small drill pipes from being broken or deformed due to insufficient strength.

3. When clamping the drill rod with a vise, do not clamp the female part of the female connector to prevent the female buckle from being clamped and deformed.

4. When attaching the drill pipe, the pre-tightening force of the make-up should be controlled within 15MPa to prevent the difficulty of unloading due to excessive pressure. Avoid using fire to bake the joint, which will reduce the mechanical properties of the joint (especially the female joint) and affect the service life. Without pre-tightening, the threaded connection swings, causing the threads to grind each other and the crests to become sharper, resulting in ridges on the sides, resulting in thread damage and sticking. If there is no pre-tightening and the step of the female buckle is not pressed tightly, the thread root of the male joint may be fatigued and broken. Under the action of high-pressure liquid flow, the female joint will be pierced, resulting in puncture corrosion, which may easily lead to longitudinal cracking of the female joint.

5. Pay attention to clean the male and female buttons before attaching the drill pipe, and apply thread oil (thread oil cannot be replaced by other waste oil or inferior pressure oil) to prevent premature wear or damage of the male and female buttons .

6. Pay attention to cleaning the water channel holes before installing the drill pipe to prevent the debris from blocking the channel and causing the mud system to hold back pressure.

7. Be careful not to forcibly buckle up. When buckling, the male buckle can not impact the shoulder and thread of the female buckle, and ensure that the male and female joints are centered, and the coaxiality of the unloader of the drilling rig and the main shaft of the power head is ensured.

8. Pay attention to check the wear of various parts of the drill pipe. If abnormal wear occurs, the cause should be found in time:

1) Determine whether the drill pipe is scratched by sharp and hard substances in the hole.

2) Determine whether the drill rod is scratched by the drill guide device.

3) When the scratch marks on the body of the drill pipe are about 1mm deep in a spiral shape for more than one circle, please use it with caution. Prevent the drill pipe from being broken during construction, resulting in greater losses.

9. Pay attention to the damage of the short connection of the drill collar (wrong opening, serious wear of the random buckle, etc.), and it should be replaced in time to avoid damage to the drill pipe thread.

10. Pay attention to hoisting and avoid impact damage to the male buckle when handling the drill pipe.

11. Be careful to avoid mixing drill pipes of different buckle types, even if they are not produced by the same manufacturer, do not mix them (because the technical parameters, processing methods, props, and mechanical equipment of drill pipes manufactured by various manufacturers are different, and the tolerances of the drill pipes processed are different. , close distance, etc. must be different); the difference between the old and the new is too large, and the drill pipes with too much wear and tear should not be mixed to avoid construction hazards.

12. It is found that the drill pipe buckle type has local small-scale damage (about 1-2 buckles, the buckle length is 10mm), and it should be repaired in time before use.

13. Pay attention to avoid holding any part of the drill pipe body with a vise, so as to avoid the rod body being pinched and reducing the service life of the drill pipe.

14. Use qualified thread grease. Butter is not suitable for thread oil. Insufficient thread grease will cause damage to the shoulder of the joint and produce high points, which is easy to "loose" the threaded connection and cause the thread to be damaged. Do not use thread grease or use unqualified thread grease, the surface of the thread will be glued, resulting in the phenomenon of sticking.