drilling

Sonic Drilling Method: How Does It Work?

Drilling with high-frequency, resonant energy created inside the sonic head is an advanced kind of drilling. As the sonic drilling string moves down the hole, resonant energy is transmitted at various sonic frequencies to the drill bit face.

How It Works

The sonic drilling equipment consists of three main parts.

  • Drill Head
  • Resonator (drill pipe or drill rod)
  • Soil type

As a result, the method’s three interdependent components must operate together harmoniously to be effective.

Sonic Drill Head

For this approach to be effective, tremendous vibrational wave energy must be efficiently transferred from the drill pipe’s upper section to the drill bit’s lower section, with very little power being lost in the process.

Counter-rotating rollers or eccentrics are often used to create linear forces. Although it does not cut, the bottom bit crushes the rock into dust or bludgeons mud and clay to the side.

Resonator

oil rigSonic drilling heads are designed to apply as much power as possible to the top of the drill pipe while transferring as much energy as possible to the bottom of the drill pipe, where it can be most effective in piercing a formation’s formation.

The frequency of energy input must fluctuate as drilling proceeds and new sections of pipe are added to maintain the wavelength condition. It takes less input energy to bring the steel drill pipe into resonance as it becomes longer.

To be sure, higher frequency operation of the sonic head allows for increased force production as drilling depth increases, allowing for sustained penetration at longer depths.

Drilling with Sonics

Soil is fluidized by the resonating drill steel when the sonic drilling head and the drill steel pipe are brought into resonance. This reduces the frictional forces that bind and constrict the pipe.

If you’re drilling in sandy or gravelly formations, the drill bit will readily disrupt the elastic connections between the particles. The sand grains will then rearrange themselves and migrate to the outside of the bit face.

Porous and saturated formations are more easily able to absorb soil particles that have been dislodged from the bit. Sonic drilling in clay-type soils is more difficult. Clays are less movable than sands and gravels because of their cohesive nature.

Sonically fracturing rock formations with tungsten carbide inserts requires special bit designs with inserts. A flushing medium, like air or water, is commonly required when drilling solidified formations to wash away cut material and keep the bit exposed to raw material.

Why Should You Consider Sonic Drilling?

Drilling applications requiring undisturbed core sampling across virtually any geological formation can benefit from sonic drilling. There are numerous advantages to using this strong technology as opposed to other sorts of drilling procedures. Low-impact technology makes crew tool handling safer by reducing the number of tools used.

 

What Popular Drill Techniques Can We Use Today?

drill techniquesA few drill techniques are being used by various industries today. When you drill a borehole, you will encounter a sundry of rock layers and different kinds of sediments. To successfully and seamlessly drill through them, an array of manual techniques in drilling have been developed. Fortunately, all of them are currently used in many different drilling applications.

Each of those drilling techniques needs to cut or break through the ground layers. 

After this, the cut or processed through ground material needs to be taken away from the hole. There would be occasions also when it is highly necessary to give support to the walls of the hole to keep it still and stable, and thus prevent it from collapsing while drilling work is in progress. 

These drilling techniques were developed either just for one or various types of rocks and specific sediment. There are also circumstances that complementary drilling techniques are applied together with other drill techniques for a single borehole. These drilling techniques we have today are classified in the following drilling principles.  

Hand Auger

The hand auger type of drilling method comes with extendable steel rods. You operate them by rotating a handle, and then at the bottom part of it, you can attach an array of steel drill bits. The augers will then need to be rotated until they get filled. To empty them, they need to get lifted out of the borehole. 

It is very possible to make use of different drill bits for each type of sediment you will encounter. As for the borehole, it will generally remain open sans requiring any kind of support.  

Sludging 

To bring the cuttings up to the surface in sludging you will need to take advantage of water circulation. In an up and down motion, you will see the drill pipes will go. The drill bit impact on the downstroke will loosen up the soil but when taking on the upstroke, the upper part of the pipe will be closed by hand. This causes the water to be drawn up via the pipe, then eventually taking the cuttings to the surface.  

Percussion

With percussion type of drilling, what happens is that the hammering bit will be attached securely first to a cable or a rope, then it will be dropped multiple times into the open hole. This can also be a type of temporary casing where tripod may be taken advantage of to be used as a supporting tool. 

When you move the rope or the cable in an up or down fashion about a meter, the hammering bit will loosen up the consolidated rock or soil in the borehole. Eventually, this will undergo the process of extraction with the help of a bailer.

Much like with hand augering, temporary steel or plastic casing can be used to make the hole stable and thus keep the possibility of it collapsing at bay. After installing the permanent well screen and casing, the temporary casing will have to be removed. Most of the time, a manual percussion drill is taken advantage of to a depth of around 25 meters to the ground.

Jetting

Jetting is the last of the drill techniques we want to feature here. Much like the others, this method of drilling is also based on water pressure and water circulation. Unlike sludging, you will need to pump the water down the drill pipe. This action will render the cuttings and the water to be transported to the hole that is between the borehole wall and the drill pipe. To have an adequate amount of water flow, a motor pump may offer substantial help here. 

What to Do Before You Buy Drill Rigs for Sale?

When trying to shop for some drill rigs for sale, what exactly are you looking for? What attributes should you check out to know that you’re getting the most value for your money? Would you be choosing a rig simply because it can drill a good percentage of your business? Or would you consider a rig that can work beyond the scope of your business?

Ease of use, safety, and reliability — it is crucial to take these 3 things into account when trying to shop for a drill rig because they all complement each other.  The safety level of any equipment increases if it is reliable enough, most especially when you use them within the recommended limits of the manufacturer and they are operated correctly. 

The task of choosing the right rig to use for your business is no different when you’re trying to figure out the right and appropriate tool to have for any job. You can complete a job of installing a drywall nail using a six-pound sledgehammer, but are you willing to take some risk for this? This also applies to a scenario where you will try to break cement with the use of a 9-ounce drywall hammer. You can certainly get the job done, but how long will it take you to complete everything up?  

Below are 3 important questions you need to get answers for when trying to invest money on a brand new equipment. 

  1. What type of drilling work is taking up or consuming 85% of your business time?
  2. What kind of geological formation are you likely to come across with most of the time? 
  3. Where does the majority of your business take place?  

The first thing that you need to mind about first is what comprises 85% of your business? The rig that can handle at least 85% of your business needs is undoubtedly way more productive and more practical to have than acquiring a rig that is solely designed for use in specialty projects

There is no denying that a big rig is powerful enough to drill through any size hole. But the million dollar question here is at what cost are you willing to take. The second important question in line with this is what kind of geological constraints are you most likely to come across with 85% of the time? When it comes to high water table areas, mud rotary is believed to be highly productive both with formations that can be classified as consolidated and unconsolidated.

What is most suitable for air rotary are fractured zones or dense formations with low water tables. For a smaller rig, the air compressor feature that it comes with is not working to its advantage. A downhole type hammer is an extremely indispensable and invaluable tool to have when working on  hard geological formation, especially if the hard formation to be drilled into is vast or expansive. 

drill rigs for sale

Final Thoughts

It all boils down to finding the right tool to use and the right application to have a. A rig that is powerful enough, capable of drilling through 1,000 feet can set a large casing can be worked out to drill a 100-foot hole. The underlying question here is, at what operating cost? 

Big drill rigs for sale naturally require more horsepower, and thus would consume maybe hundreds of gallons of fuel every hour. The same thing can be said for a drilling rig structured to drill through 300-foot holes. One can certainly work it out to drill through 1,000 feet, but  what about the extra equipment that it will require or the time it would take to get the job done? 

When it comes to choosing a drill rig for sale to acquire and purchase, it is important to pick something that will work best for your business’ operating area. The bigger the work  at stake is,  the more move in and move out time it will take. However,  the more expansive  a project is, the greater the odds are that there is going to be a road built and intended for access.