NUMA125 DTH Hammer

 

 

The NUMA125 DTH Hammer is a robust and high-performance drilling tool designed for demanding drilling applications in the mining, construction, and geothermal industries. With a focus on precision, durability, and efficiency, this hammer is engineered to deliver exceptional results in even the toughest drilling conditions.

 

 

The NUMA125 DTH Hammer is usually used in the following situations, especially in projects that require large diameter drilling or in projects with more complex geological conditions:

 

High rock hardness: The NUMA125 DTH Hammer is an ideal choice when you need to drill through very hard rock or geological formations. It can provide enough impact and energy to cope with the drilling needs of high hardness rock.

 

Large Diameter Drilling: The NUMA125 DTH Hammer is suitable for projects that require large diameter drilling, such as underground blast holes, mine blast holes or large diameter boreholes. It can complete drilling of large hole diameters in a short period of time.

 

Deep well drilling: In deep well drilling projects, the NUMA125 DTH Hammer also performs well. It can provide enough impact and energy to effectively penetrate deep geology and ensure hole wall quality.

 

Complex geological conditions: When project geological conditions are complex and there are many different types of rocks or soil layers, the high performance and adaptability of the NUMA125 DTH Hammer make it an ideal choice for solving complex geological challenges.

 

High Productivity Requirements: Where high productivity and rapid project completion are required, the NUMA125 DTH Hammer can provide fast and efficient drilling, reducing the overall project run time.

 

In short, when large-diameter or deep well drilling is required in high-hardness rocks, and high productivity and drilling quality are required, the NUMA125 DTH Hammer is a reliable tool that can cope with various complex drilling needs.

 

According to the gas distribution method, the downhole hammer can be divided into two types: valve type hammer and valveless hammer. In addition to the different gas distribution methods, the structure is slightly different, but the working principle is basically similar, but the valve type and its anti-pollution ability are even worse.

 

There are many reasons for the failure of the down-the-hole hammer , but the manifestation is mainly the hammer without impact, impact force and intermittent impact. Analysis of the cause of the failure and subsequent improvements to the equipment will contribute to the improvement of the hammer structure and drilling process.

 

Inductive classification of its fault factors can be analyzed from the following five aspects:

1, processing defects

The dth hammer piston and the cylinder liner are tightly matched, and the mating length is long, and the processing precision and surface smoothness are required to be high, which requires a very high cylindricity of the piston and the cylinder liner. If the cylindricity is not guaranteed, the piston will be directional or intermittently stuck. In the end, it may not be right. Lift the drill pipe at the airport and repair the hammer.

 

In addition, the rigidity of the outer casing of the hammer is also an important factor that limits the service life of the hammer. If the outer casing is of poor hardness. During the drilling process, the inflating machine will be deformed due to frequent collision with the well wall; when the hammer is not working, it is often necessary to vibrate and disassemble and clean the hammer, which in turn will aggravate the deformation of the outer casing of the hammer; The deformation will cause each part of the hammer to become stuck and cause disassembly, which will eventually cause the hammer to be scrapped.

 

For the effective movement of the inner cylinder and piston of the hammer and the high-precision production of the product, Superman DTH Machinery Co., Ltd.has been working deeply for 20 years.

 

2, the hammer tail backstop seal is not reliable

At present, the tail of the hammer for geophysical exploration is provided with a check valve. The sealing form is mainly based on the compression deformation of the spherical rubber cap or the O-ring attached to the metal cone to perform the backstop sealing. Its backstop function is achieved by an elastomer, and the elastomer generally has a guiding device.

 

This type of sealing has the following problems:

(1) The friction between the spring and the guide will affect the cutoff speed of the reverse stop valve;

(2) If the rubber seal material is compressed frequently for a long time, the friction will make it wear over;

(3) spring fatigue failure, resulting in reverse sealing failure;

(4) When the gas is stopped, the sudden decrease of the internal pressure of the hammer causes the rock powder or liquid-solid mixture to pour back into the inner cavity of the hammer, which will cause the piston to jam;

(5) More seriously, when water carries cuttings into the valve position (valve type hammer), the valve cannot normally close the valve, resulting in the failure of the hammer to discharge only debris without impacting work.

 

 

Bit Shank	Connection Thread	Hole Range	Length	Weight	Working Pressure		Air Consumption (m³/min)
NUMA125A	API 6 5/8" Reg	Φ305-445mm	1956mm	578kg	10-25Bar		14Bar	24Bar
							32.94	54.54

 

 

Drill Bits	Diameter		Gauge Buttons (mm)	Front Buttons(mm)				Weight(KG)	Part Number
	mm	Inch		Flat Face	Convex Face	Concave Face	Face Type
	305	12	Φ18*27	Φ18*15	/	Φ16*11	Concave Face	182.0	LR-N125A-305CC
	315	12 2/5	Φ18*27	Φ18*15	/	Φ16*12	Concave Face	206.0	LR-N125A-315CC
	325	12 4/5	Φ18*27	Φ18*15	/	Φ16*15	Concave Face	209.0	LR-N125A-325CC
	350	13 7/9	Φ18*27	Φ18*24	/	Φ16*12	Concave Face	228.0	LR-N125A-350CC