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Maintaining for the Down The Hole Hammer

April 26 , 2022

1. When start drilling, try to use a small air volume and propulsion force to make the drill bit enter the rock layer smoothly, which can reduce the impact on the piston. 2. It is very important to match the propulsion force and the model of the drill. The thrust of the propeller must change with the weight of the drill. Remember that the small Hammer should not have a large thrust, in case of the piston or drill to break on the spot. 3. Because there is a right-hand thread between the joint of the Hammer and the joint, during the drilling process, the Hammer should always be rotated to the right, and the drill should not be reckless. 4. During the drilling process of the water well drilling rig, due to stones, sand particles and cracks in the rock formation, the drill may be stuck. Therefore, it is very important to regularly use the Hammer to blow strongly and clean the bottom of the hole. Do not turn the stuck drill sharply, so as not to drop the front joint and drill bit into the hole. 5. The rotation speed usually used by the Hammer is generally 15-25rpm....

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Selecting the type of drill bit for well deviation formation

April 22 , 2022

The larger formation dip is the main reason for the well deviation, and the bending of the lower drill string and the improper selection of the drill bit type are the technical factors that cause the well deviation. From the long-term production practice, the shaft-shift type bit is likely to cause well deviation when drilling in inclined formations, so the roller cone bit with no shaft-shift or a small amount of shaft-shift should be selected. At the same time, under the premise of ensuring a small axis shift, a bit softer than the formation rock should also be selected, so that the ROP can be increased at a lower WOB, which can not only ensure the ROP, but also reduce the well deviation.

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Drilling Bit selection for soft and hard staggered formations

April 21 , 2022

Drilling Bit selection for soft and hard staggered formations In soft and hard staggered formations, generally we should choose to increase the wedge tooth or the height of the conical spherical tooth in the insert bit, so as to have a higher ROP in the softer formation and ensure the drill ability in the hard formation. However, the WOB and rotational speed of water well drilling rigs should be different during drilling. When drilling in soft formations, the rotational speed can be increased and the WOB can be reduced. In the well sections of hard formations, the WOB should be increased and the rotational speed should be reduced to achieve better geological conditions. economic effect.

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DTH Hammer Drilling Advantages

April 21 , 2022

DTH Hammer Drilling Advantages (1) The cost is low. The down-the-hole hammer drilling requires small axial pressure on the drilling rig, low rotational speed, low torque, and low natural power consumption. The diameter of the drill pipe is relatively small, easy to install and disassemble, and has a long service life. (2) The drilling efficiency is high, the life of the drilling tool is longer, the down-the-hole hammer drilling is used for rock drilling, the medium is air, and there is no problem of recovery and disposal of the flushing medium, which reduces the auxiliary time. (3) In the stratum with serious leakage and unstable hole wall, the down-the-hole hammer drilling can be used to drill with the pipe to completely solve the problem of repeated operations. ​​ (4) DTH hammer drilling, the hole wall is relatively complete, there is no pollution from other materials , the original formation structure and water permeability can be basically maintained, the well cleaning time is reduced, and the cost is saved. ​​ (5) As the down-the-hole hammer uses wind as the power source, it is constructed in severe winter, which greatly reduces the workload of cold protection in previous winter construction.

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Truck Mounted Type Drilling Rig Machine

April 11 , 2022

The truck-mounted drilling rig is specially designed for field drilling and convenient transportation. The vehicle-mounted type integrates the truck chassis, drilling rig equipment, air compressor, mud pump, etc. The structure is reasonable and the operation is simple. After arriving at the construction site, there is no need for additional crane loading and unloading, which greatly facilitates the drilling work and saves manpower and material resources. 1. The truck chassis can be selected from Chinese brands such as Sinotruk and Dongfeng, or other brands can be selected according to customer requirements 2. The drilling rig can choose PTO to take power, or can choose independent engine. 3. Optional air compressor and mud pump for percussion drilling or mud drilling. 4, Up to 6.6 meters of stroke, retractable carriage, saving space.

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Drilling Bit selection for abrasive formations

April 08 , 2022

Abrasive formations can cause the bit teeth to wear out too quickly and the ROP to decrease rapidly. The drill bit has less footage, especially the orbital teeth of the drill bit, the back cone of the cone and the claw tip, so that the diameter of the drill bit becomes smaller, resulting in exposed bearings, which will accelerate the damage of the drill bit. It is best to use insert teeth for drilling in this formation drill.

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