1. It improves drilling efficiency and reduces labor intensity With
hydraulic automatic feeding mechanism.
2. It can be achievedwithout stopping to change rods, easy to
operate, safe and reliable with ball clip holding mechanism
orhydraulic chuck.
3. It hashole bottom pressure gauge to be easy to master the
situation in the hole.
4. It also has advantage of Compact structure,concentrated handle,
small footprint, light weight, strong decomposition, easy tomove.
It can be operated in plains and mountainareas.
Q1: How long can your air compressor be used?
A: Normally more than 10 years.
Q2: What are the terms of payment?
A: TT, Western Union transfer.
Q3, Can you provide us with the documents for customs clearance?
A: Of course. We will send you commercial invoice, sales contract,
packing list, bill of lading (FOB or CFR, CIF terms), insurance
policy (if CIF terms), and certificate of origin if you need it
Q4: How is your customer service?
A: 24-hour online service. The 48 hour problem was solved (except
in special cases).
Q5: How about your after-sales service?
A: 1. Provide customers with online installation and commissioning
instructions.
Well trained engineers can serve overseas. (non epidemic impact)
What should be paid attention to when using DTH bit?
1. according to the rock conditions (hardness, corrosion) and drill
type (high wind pressure, low wind pressure) to choose the drill
bit.
Different forms of alloy and cloth teeth are suitable for drilling
different rocks.
Choosing the right drill bit is the premise to get the best use
effect;
2. When installing the drill bit, gently insert the bit into the
drill bit bit sleeve of the drill bit impactor. Do not force
collision to avoid damaging the drill bit
In the process of rock drilling, it is necessary to ensure that the
pressure of air on the drilling rig is sufficient;
3.In case of intermittent work , the compressed air system of the
drilling machine should be checked to ensure that there is no rock
slag in the hole during the drilling process;
4. If a metal object is found falling into the hole, it should be
pulled out with magnet or other methods in time to avoid damaging
the bit;
5.Pay attention to the size of the hole drilled when replacing the
drill bit.
If the bit diameter is too worn out but the hole has not been
drilled, do not update the bit to avoid sticking.
The operation can be completed with old drill bits that have been
used and worn out to approximately the same diameter
Prevention of drilling hole collapse
The preventive measures for hole collapse should first meet two
conditions: mud liquid column pressure = technological pore
pressure; Minimize water infiltration into the rock and soil or
water seepage around the hole wall.
Preventive measures for hole collapse caused by geological factors
include:
(1) Increase the mud density and increase the mud liquid column
pressure to balance the formation pressure;
(2) Use a larger ratio of mud to plastic to protect the hole.
Preventive measures for hole collapse caused by physical factors
include:
(1) Start the pump too fast and keep the drill pipe working under
constant tension as far as possible to avoid the sudden increase of
liquid column pressure and the violent impact of drilling tools on
the hole wall;
(2) According to the distribution of underground obstacles, the
drilling track design and reaming procedure shall be well done to
avoid the rotary extrusion of the drilling tool on the hole wall
caused by the excessive curvature of the guide hole;
(3) Reasonably control the mud density and rheological properties,
make the mud have a certain liquid column pressure, and maintain
the low return velocity of the mud
