Down The Hole (DTH) Rock Drilling - An Introduction

Commonly known as DTH, the Down-the-Hole Hammer drill is a percussive device in cylindrical form with integral drill bit that is fitted directly onto the bottom of a drill string. Technical Data used in the field explained in drilling courses in Rawalpindi.  DTH is one of the most efficient ways of drilling rock, using a rapid hammer action to break the rock into sizeable chips which are then evacuated from the bore hole by the air exhausted from the DTH Hammer. The technique provides fast drilling of accurately aligned, straight and clean holes in most ground conditions.

It is important to remember in rock extraction that blasting is the first phase of crushing. It is therefore vital that time and effort is spent on ensuring that the hole size, overall blast design and explosive loading is appropriate for the conditions, in order to achieve good fragmentation, optimum productivity, safe stable faces and level floors at minimal cost. Some more details of drilling courses in Rawalpindi are as under.

Jack hammers were used for springing, stopping and popping. Although they were lightweight, portable, easily maintained and inexpensive, they were essentially labor intensive, low volume producers, resulting in small holes and limited control, as well as presenting significant health and safety issues.

The cable tool was primitive and used a heavy bar with a chisel, suspended on a wire rope that was then mechanically dropped on the rock to crush it within the hole, using water to bale clear the resultant cuttings and dust. Again easy to use, simple to maintain with low cost operation, minimal dust and effective in bad ground, but the cable tool was slow and limited to larger holes, with no alignment control. It required a regular water supply, two man operation and was really only of use for soft to medium rock formations. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join drillingcourses in Islamabad.

Casing and Tubing - Drilling

A bit attached to a drill string that rotates into the earth, is used to create a well 127.0 mm to 914.4 mm (5-36 inches). Technical Data used in the field explained in drilling courses in rawalpindi. Following the hole drilling process, casing is placed is placed into the hole. Casing and tubing is used for two main purposes, the first of which is to strengthen the newly drilled well, and secondly, to reduce the potential hazards of high pressure zones below the surface.

With the well now safely secured by the casing, a smaller drill bit can be used to drill deeper into the earth. Smaller casing is then used to secure the smaller hole as it is drilled into more-potentially unstable formations. Most wells have 2 to 5 sets of subsequent holes drilled inside itself, each level being strengthened by cemented casing. Some more details of drilling courses in Rawalpindi  are as under.

The sheer weight of the drill string and collars break up the earth as the drill bit digs down. The breakup of the rock is helped by having drilling fluid pumped down the drilling shaft and exiting at the drill bit. This also keeps the drill bit cool, clean and lubricated. The rock cuttings generated by the drill bit are carried back up to the surface by the drilling fluid. The drilling fluid is filtered through shakers to remove all of the rock fragments before being reused. Watching for abnormalities in the returning cuttings and volume of returning fluid are imperative to catch "kicks" (when the pressure below the bit is more than that above, causing gas and mud to come up uncontrollably) early. The pipe or drill string to which the bit is connected is little by little lengthened as the well gets deeper by screwing in several 30-foot (10 m) joints of pipe at surface. Usually joints are combined into 3 joints equaling 1 stand. Some smaller rigs only use 2 joints and newer rigs can handle stands of 4 joints.

This operation is all facilitated by a drilling rig which contains all necessary equipment to circulate the drilling fluid, hoist and turn the casing and tubing, control downhole pressures, remove cuttings from the drilling fluid, and generate onsite power for these operations. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join drilling courses in Islamabad.

Oil Drilling Environmental Preservation Efforts

Not only are citizens concerned about the impacts of oil drilling on the environment. Oil companies have the same concerns about the environment. Technical Data used in the field explained in drilling courses in Rawalpindi. Oil companies have made great strides in reducing the risks to the environment when drilling for oil. There are many ways that the environmental impact can be reduced when drilling.

When oil is drilled offshore, there is not only concern for the environment from the act of drilling and possible spills, there is concern regarding the emissions from the offshore drilling rigs. The truth is that the rigs must adhere to emission regulations to meet air quality standards. In addition, many drilling rigs use low sulfur fuel and filters to reduce or eliminate some emissions. Some more details of drilling courses in Rawalpindi are as under.

The number of barrels of drilling mud and cutting that's dumped into the ocean is regulated. The components are chemically inert and not harmful. The bacteria content is controlled with natural methods that won't affect the ocean.

Maximum allowances are rarely met. They are calculated in the event a rig must be running full speed continually. This is set in the event there is a need to run the rigs. Actual use is must less than the maximum allowed.

Seismic wave use is restricted when it interferes with whales and dolphins that use sonar are in the area. The seismic wave can change migration and even cause some whales to beach themselves.

Before the well can be drilled, equipment and workers must be able to reach the site. Often roads need to be created. The impact during the drilling will happen; it can be kept to minimum with proper planning. After the well is no longer used, oil companies will work to restore the area to its previous condition as much as possible.

At the drill site, there are restrictions on the number of platforms built per well. This reduces the impact on the environment. With the technology that is available to do horizontal drilling, it further reduces the effects of oil drilling on the environment because fewer wells are built. One well can access several reservoirs of oil. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join drilling courses in Islamabad.

Small Drill Rigs For Pile Driving

Drill rigs have become a common sight on commercial construction job sites due to their versatility. Technical Data used in the field explained in drilling courses in Rawalpindi. Because construction sites offer unlimited variations of challenges, manufactures of drill rigs have developed technically advance machines that provide site managers and subcontractors with multiple options to facilitate speedy solutions when time is of the essence.

Unlike projects that are located on wide open spaces, renovation construction project managers must take into consideration a multitude of existing variables. Renovation challenges may include jobsites with limited access, limited overhead space, confined spaces, and the need for businesses (both onsite and adjacent) to be minimally impacted. For these reasons, a variety of options are available for use. Some more details of drilling courses in Rawalpindi are as under.

Project manager are sometimes challenged with the need to provide additional foundational support to existing structures. These situations result in the need for creative solutions. In most cases the existing structures pose limitations that can be resolved with traditional drill rigs.

Many manufacturers have addressed this need with low overhead drilling rigs. Some of these rigs require as little as six feet of overhead clearance to drill micropiles. To add to their allure, most of these machines also utilize rubber tracks instead of traditional steel tracks. This allows operators to enter into buildings without damaging the existing slab.

Other features that make these micro drilling rigs desirable are the ability to separate the power source from the drill rig. These attributes prove to be highly valuable, especially in situations where existing businesses wish to remain open while undergoing the construction renovation. By locating the power source in a location that is outside of the building, business owners do not experience the exhaust fumes from the diesel engines that are necessary to power the drill rigs. Placing the diesel engine outside of the structure also greatly reduces the noise that accompanies piling equipment. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join drilling courses in Islamabad.

How To Find A Good Quality Water Well Drilling Rig

If you are planning to drill a water well, then you will need the right equipment, as this will make sure that your project performs in an efficient way, and more importantly, that you get the right results. Technical Data used in the field explained in drilling courses in Rawalpindi. Therefore, when it comes to searching for a water well drilling rig, the equipment material quality is essential as this will make a huge difference in the outcome of your drilling projects, such as if you were to create a water pump station.

A great place to find a good quality water well drilling rig is by going online. The reason this is an effective route to take is because you will be able to find reputable manufacturers who sell well drilling rigs, and more importantly, it becomes easier for you to choose the best water well drilling rig for your specific needs. The way in which this is possible is by being able to browse through various manufacturers' websites at almost the same time, which in turn makes it easy for you to compare drilling equipment from each of these manufacturers without any difficulty. Some more details of drilling courses in Rawalpindi are as under.

By having the power to easily compare drilling equipment from one manufacturer to another, you will then be able to choose the best drilling equipment for your project. However, to make the right purchasing decision, there are a few points that you should always keep in mind. First of all, it is important that your drilling rig specifically drills a straight line, because this precision will make sure that your project is successful. The water well drilling rig should also be easy to use, portable, yet powerful enough to drill the required depths to create a water well. All of these factors are important, because you will find that no two water wells will have the same requirements. For example, you might find that you only need to drill as deep as 100 meters for one specific water well, yet have the need to drill as deep as 200 meters for another well. Your drilling equipment should handle all types of projects without any difficulty. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join drilling courses in Islamabad.