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On the surface of the horizontal directional drilling (HDD) is not excavation surface conditions, the laying of a variety of underground utilities (pipes, cables, etc.) of a drilling way, it is widely used in water supply, electricity, telecommunications, gas, gas, oil and other pipeline construction, it is suitable for sand, clay, pebbles and other DeKuang, GREAT can choose different models according to different formation of pipeline construction.

The operating environment temperature is -15℃~+45℃.

Horizontal directional drilling technology is a new construction technology that combines the directional drilling technology of petroleum industry with the traditional pipeline construction method.

Directional drilling control direction:

Wired directional control: long distance, deep penetration, and large rig use

Wireless direction control: short distance, shallow crossing, and small and medium-sized drilling rig use, direction control is convenient and accurate but limited by depth, terrain, less use.

Commonly used directional well drilling products are Tricone bit and PDC bit.

Horizontal well is a kind of directional well.

Trenchless refers to the use of a variety of rock and soil drilling and digging equipment and technology, through guidance, directional drilling methods such as in the case of a very small part of the excavation surface (generally refers to the entry and exit) small area excavation, construction, replacement and repair all kinds of underground pipeline laying technology, not blocking traffic, not green, vegetation destruction, will not affect the stores, hospitals, schools and people's normal life and work order, solve the traditional excavation disturbance to the residents, the traffic, environment, the destruction of the surrounding buildings foundation and adverse effects, therefore has high social and economic effect.

Drilling a pilot hole, hole opener(Rock reamer) and pipe installation are the three basic steps of horizontal directional drilling (HDD).

About Drilling:

1. Use special drilling tools (PDC bit or Tricone bit, drilling tool) to break up the rock in the stratum to form a well and reach the target layer, which is drilling.

In general:

The well depth within 1500 meters is shallow well.

1500-2800 meters is a medium-deep well.

2,800-4,000 meters deep well;

Over 4000 meters are ultra-deep Wells;

2. There are many types of Wells for various purposes. The common ones are general production Wells (vertical Wells) :

The hole drilled is vertical and is called a vertical well

Since the ideal vertical well does not exist, the field specifies standards such as drilling engineering.

If the following conditions are met, a straight well can be identified as qualified.

Directional wells and horizontal wells:

The method of drilling along the pre-designed borehole axis to reach the target layer is called directional drilling.

Drill with drill bits method, there are three basic parameters (drilling three elements) :

Bit pressure: the pressure applied to the bit.

Supplied by weight of drill string.

The amount of bit pressure is determined by the bit's bearing capacity, the weight the drill string can provide, the hole mass requirements, and the higher rate of penetration.

GREAT has designed different types of PDC bits for directional Wells.

High efficiency drilling, high ROP and more footage have been achieved.

At the same time, the PDC bit produced by GREAT can be repaired more frequently, which greatly saves the overall drilling cost.

Because GREAT very strict selection of high-quality raw materials steel and PDC cutters, and has a special processing technology, bit effect is also received by the customer's praise.

Drilling in day and night, GREAT provides 7/24 service online.