Different Types of Drilling Rigs

April 21, 2020

Drilling rigs are massive structures that are used to drill wells that have water, oil, or natural gas. The most common components of drilling rigs are pipes, cables, drill bits, and derricks, which all play a huge role in extracting vital commodities under the Earth’s surface. 

These structures are not only used for extracting natural resources, but they can also be used in the construction industry. Drilling rigs are utilised in building foundation construction, roadbed, bridges, and airport constructions. They can also sample subsurface mineral deposits, test properties of rock, soil, and groundwater, and install underground utilities, instrumentation, and tunnels.

What makes the aforementioned applications possible is the presence of different drilling rigs. Drilling rigs have numerous types, which can be accurately grouped into the following factors and attributes. 

Power Source

Some drilling rigs can be powered by diesel, while others rely on electricity to run. Drilling rigs that are run by diesel engines use clutches, transmissions, and torque converters to power the whole thing. Alternatively, drilling rigs that are powered by electric motor generates power through the internal combustion engines. Drilling rigs can also be powered by hydraulics, steam, and pressurised air.

Pipe Varieties

There are drilling rigs that use cables to raise and drop drill bits. On the other hand, some drilling rigs use plastic or metal drill pipes to perform their intended function. Lastly, a coil tubing rig uses giant tube coils and downhole drilling motors to get the job done.

Drill Pipes Height 

Another factor to consider in knowing some types of drilling rigs is through their height categorisation, which can be measured through the height of the unattached drill pipes from the hole and the number of connected pipes in the derrick. A single rig can pull single drill pipes, while double rigs can work with a stand of pipe that has two connected pipes in the derrick. Triple stand rigs can handle three drill pipes, while a quadri stand can work with four connected drill pipes. 

Drilling Method

Most service rigs and direct push rigs have non-rotational rigs. However, some drilling rigs utilise rotary table rigs, which can achieve rotation by turning a hexagonal or square pipe at the floor level of the drill. The rotation and circulation of top drive rigs, conversely, are done around the top area of the drill string. Sonic rigs are known to use vibratory energy for the advancement of the drill string, while hammer rigs use percussive and rotation force for the drill string.

Derrick Position

Some conventional rigs have a derrick or lifting device that is positioned vertically. Other drilling rigs, however, have derrick slanted at an angle of 25 degrees. 

Drilling rigs have various types that are classified and grouped according to the mentioned factors. To know more about drilling rigs, just visit us at Adz Lift Crane Hire. We are a locally owned and operated company that provides professional and reliable crane and rigging services in Geelong.