Posts made in October, 2015

Advantages of Wireline Drilling Method

Several drilling methods and machinery are available for different drilling needs. Shallow drills can be done hydraulically, for instance, while deeper holes may require diesel power. Different drilling diameters can also be achieved for different purposes.  One drilling method that has fast risen to popularity is the wireline drilling method. Wireline drilling rods are designed specifically for the wireline drilling process. In this process, the diamond drill rods carry out drilling in a regular manner but the core is collected differently. With many drilling techniques, drilling has to be discontinued and the rods removed from the hole to facilitate core removal. After every removal, the drilling rods are then lowered back into the hole and drilling resumes. Since drilling rods range between one and three meters, boring a kilometer or two into the earth can be quite arduous.

Wireline Drilling is a process whereby the drilling apparatus expels the core without having to remove the diamond drilling rods. The core is expelled by use of a feature called an “overshot.” The overshot is attached to a wireline, and it winches the inner tubing that was used to capture the drilled core, out of the hole. Empty tubing is then lowered back. All this happens while the diamond drilling rods are still in position down the hole. Once the tubing is back, drilling resumes. Besides a considerable reduction in drilling time, there are two other advantages to this drilling technique.

Reduced danger

When drilling in areas prone to caving, wireline drill rods would be the best option to use. The outer barrel of the drill and the drill string remain firmly in position while the inner tubing removes core substance after every run. The material in the walls of the hole does not, therefore, get disturbed and loosen leading to a cave-in.

Increased bit life

In situations where the drill bit has to be removed after every run for core expulsion, the bit often loses its drilling “strength” or becomes dull quicker. The loss in “bit-life” can be attributed to constant re-drilling necessary whenever the apparatus is on re-entry to continue drilling. Cave-ins, especially, contribute to this loss of life. In the wireline drilling technique, the diamond drill rods are not subjected to this need for re-entry drilling. They will, therefore, achieve more drilling over longer periods of time before requiring change.

Finally, the less drilling time and effort accorded by wireline drilling technique translates to greater drilling distances. Kilometers of earth can be removed quite easily with this method as opposed to other methods.

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Warning Signs That You May Need a New Roof

Your roof doesn’t always need to cave in or blow right off for it to be in need of serious repair or even replacement. Very often the asphalt shingle and tiles will start to wear away or come loose long before they come right off, and there are also other telltale signs that your roof is getting old and worn and needs replacing.

If you’re alert to these signs, you can have your roof repaired or replaced long before it does cave in or blow away, or at the very least, have it inspected for needed repairs. Note a few of these signs to keep your eyes open for if you’re a homeowner.

1. Shingles that don’t stay flat

Stand across the street and look at your home’s roof and note if the shingles seem to create hills, trenches, or any type of an accordion look. If so, they are probably starting to come loose and need replacing or repairing. Shingles should all be flat against the roof, but as they start to dry up or buckle with age, they may pull back toward their nails and, in turn, edges may pull away from the roof. This can allow water to seep in under these tiles and cause damage.

2. Discolored shingles

When shingles get damaged due to age or sun exposure, they may tend to change colors. The pigments added to the asphalt of the tiles can also begin to fade over time. When this happens, it’s a sign that the roof is getting old and, in turn, may need new shingles. Even if you can’t necessarily see damage to the shingles, this change in their color can mean that they’re now dry and brittle and may start to crumble and flake away sooner rather than later.

3. Lack of insulation

Your roof is part of your home’s insulation, and when it gets old or there are holes, you may notice drafts during wintertime and heat being let in during the summertime. If you’ve checked for leaks around windows and doors and know that your home’s fiberglass or blown foam insulation is in good repair, chances are the roof is the culprit. There may be shingles missing that you cannot easily see from the street or the shingles may have gotten thin and brittle with age. It’s good to have your roof inspected to note the condition of the tiles and if they need replacing or if there are holes in the roof under the shingles that need addressing.

If you notice any of these signs, contact professional roof repair contractors, like those at A & A Contractors Pty Ltd, and they can come inspect your roof and make any repairs or replacements needed. 

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Window AC: Understanding the Installation Factors

There are numerous air conditioning appliances in the market due to the advances in the manufacturing industry. The best choice for your home will depend on diverse factors, including the budget, size of your home and installation requirements. The window air conditioner is a relatively popular choice in residential environments. This is a good appliance for your home if you have a limited budget to work with. You should also purchase this design if you are a renter in an apartment complex that prohibits significant modification of the living space. If you want to purchase a window AC unit for your home, it is vital to understand different installation factors. This will help in promoting long-term quality performance.


In ideal circumstances, the window air conditioning unit is easy to install in your home. However, this will depend on the availability of a suitable window to insert the appliance. You should assess the dimensions of the potential window for installation before buying the unit. Remember, if you buy an oversized unit, you will need to modify the window space, and a very small unit will allow easy leakage of outdoor air into the interior space. Choose an air conditioner which can slide comfortably into the window area. You can seal the spaces around the unit with weather stripping to prevent inefficiency.

Weight Distribution

You will need to consider the weight distribution before installing a window AC unit. You cannot simply shove the appliance onto your window and declare the task complete. This poor installation technique will force your window to support the pressure exerted by the AC directly. The force will result in eventual damage of the window structure, especially if they are made from vinyl. You should obtain a piece of wood to attach below the window from outside. This will ease the load on the window and promote ideal weight distribution. If your new unit is bulky and heavy, consider constructing a shelf with brackets for the appliance to settle on.


The air conditioner lowers humidity in the interior space during operation. When the vapour is condensed inside the cool unit, water is eventually collected in the appliance. The window AC has a drain hole in the back which facilitates removal of this water. You should consider the positioning of the unit during installation to avoid poor drainage. The unit is designed to direct the water out when it is perfectly upright. Therefore, you should ensure that the appliance is level to ensure efficient flow of the liquid. 

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