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The use of drill pipe-beneficial mining technology.
Release time:
2021-08-17
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Select the appropriate drill pipe type according to the torque, tension and the minimum radius of curvature allowed by the drill bit. 2. During the construction process, avoid connecting large-diameter drill pipes with small-diameter drill pipes (that is, mixing large and small size drill pipes) to prevent small size drill pipes from breaking or deforming due to insufficient strength. 3. When clamping the drill pipe with a vise, do not clamp the female buckle of the female connector to prevent the female buckle from deforming. 4. Pay attention to the installation of the drill pipe. The preload of the upper buckle should be controlled within 15MPa to avoid difficulty in the hook and loop due to excessive pressure. Avoid baking the joint with fire, reduce the mechanical properties of the joint, (especially the female joint) will affect the use
According to the torque, tension and the minimum radius of curvature allowed by the drill bit, choose the appropriate one.drill pipeType.
2. During the construction process, avoid connecting large-diameter drill pipes with small-diameter drill pipes (that is, mixing large and small size drill pipes) to prevent small size drill pipes from breaking or deforming due to insufficient strength.
3. When clamping the drill pipe with a vise, do not clamp the female buckle of the female connector to prevent the female buckle from deforming.
4. Pay attention to the installation of the drill pipe. The preload of the upper buckle should be controlled within 15MPa to avoid difficulty in the hook and loop due to excessive pressure. Avoid baking the joint with fire, reduce the mechanical properties of the joint, (especially the female joint) will affect the service life. If the threaded connection is not pre-tightened to make it swing, the top of the molar teeth will be aligned with the tip by grinding the threads together, and the side will produce a ridge of teeth, which will cause thread damage. Failure to pre-tighten and press-in the female fastener procedure can result in fatigue fracture of the root of the male fitting thread. Under the action of high-pressure liquid flow, the female connector is pierced, causing corrosion, which can easily lead to longitudinal cracks in the female connector.
5. Before assembling the drill pipe, clean the male and female buckles and apply screw oil (screw oil cannot be replaced by other waste oil or inferior pressed oil) to prevent premature wear or damage of the male and female buckles.
6. Before installing and connecting the drill pipe, please pay attention to clean the channel hole to prevent debris from blocking the channel and causing pressure on the mud system.
7. Be careful not to press the button forcibly. When fastening, the male buckle must not hit the shoulder and thread of the female buckle, and ensure that the male and female joints are aligned. Make sure that the shackle of the drill bit and the spindle of the power head are coaxial.
8. Pay attention to check the wear of each part of the drill pipe and find out the cause of abnormal wear in time:
1) Determine whether the sharp hard material in the hole has scratched the drill pipe.
2) Determine whether the drill pipe is scratched by the drill guide device.
3) When the mark of the drill pipe body is about 1mm deep and rotates in a spiral shape for more than one turn, please use it with caution. Prevent the drill pipe from breaking during the construction process, causing greater losses.
9. Please note that the drill collar buckle type has been damaged (buckle, improper buckle, severe wear, etc.), and replace it in time to avoid damage to the drill pipe thread.
10, pay attention to the lifting and handling of the drill pipe, so as not to damage the ordinary buckle.
11. Please pay attention to avoid mixing the drill pipe with different button types. Even if the drill pipe is not produced by the same manufacturer, do not mix it (because the drill pipes produced by different manufacturers have different technical parameters and processing Methods, props, mechanical equipment, processing tolerances, close proximity, etc. It must be different); the new and old drill pipes are too different, and the drill pipes with too much difference in wear should not be mixed to avoid construction hazards.
12. If the drill pipe buckle is found to be damaged in a small local area (about 1-2 buckles, length 10mm), it should be repaired in time before use.
13. Please pay attention to avoid clamping any part of the main body of the drill pipe with a vise, so as to avoid the main body of the drill pipe being slipped and shorten the service life of the drill pipe.
14. Use qualified zinc-based rib fat. Butter is not suitable for use as thread oil. When the thread grease is insufficient, the joint of the platform shoulder produces high damage, which tends to "loosen" the thread connection and cause the thread to break. Do not use line grease or use unqualified line grease, will make the wire surface bonding, adhesion phenomenon.
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