SPU NL 
Hand Auger "HDT-5"
The most powerful and durable in its class
(delivery anywhere in the world)

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Video Catalog

Examples of complete sets

Technical parameters:

Connecting rod 100

Usable length: 1 m, weight: 2.94 kg.

Connecting rod 150

Usable length: 1.5 m, weight: 4.22 kg.

Connecting rod 200

Usable length: 2 m, weight: 5.50 kg.

Selection of connecting rods:

  In the examples, configurations are shown using connecting rods 50 and 200. If you use only 200 rods, the cost of the kit will decrease, but drilling convenience will be significantly reduced. This is because moving the handle in 2-meter increments makes drilling quite difficult. In addition, the use of 200 connecting rods may be difficult for other reasons, such as transportation in a vehicle, height limits at the drilling site, etc. In this regard, when planning the purchase of equipment, it sometimes makes sense to purchase transition rods of shorter length that are more convenient to use for your specific case.

Bailer A (Quicksand bailer A)

Technical parameters:

  Length: 27 cm, weight: 10.6 kg.

  The minimum casing pipe diameter that can be used is 150 mm.

  The maximum volume of raised quicksand is 7.1 liters.

  Designed for lifting liquid, dense, and loosened soil fractions. Not intended for lifting dense sand and gravel.

Application:

Lower Bailer A (Sand pump A) into the quicksand and advance it to a depth of 50–60 cm, but no more. To facilitate sinking, rotate the bailer in both directions while applying downward pressure. If the penetration depth does not exceed 15 cm, you must switch to bailer B130 (sand pump B130), or it indicates that the quicksand layer has ended.

After lifting Bailer A (quicksand bailer A), open the standard HDT lock and raise the sleeve up (example in the photo below); this will clean the bailer. For further use, lower the sleeve down and close the lock.

Bailer B100 (B100 quicksand bailer)

Technical parameters:

  Length: 66.5 cm, weight: 3.0 kg.

  The minimum casing pipe diameter that can be used is 100 mm.

  The maximum volume of raised quicksand is 2.1 liters.

  Designed for loosening and lifting dense sand and fine gravel with fractions up to 20 mm. With an increase in the diameter of the well, the size of hard rocks that can be retrieved by Bailer B100 (B100 quicksand bailer) increases. For a well with an internal diameter of 150 mm, the maximum size of extracted rocks can be 100–120 mm in one or two dimensions, and no more than 40 mm in the third. When working through the water column, if the quicksand is not fluid (for example, clean sand without clay impurities), the lifting speed should not exceed 0.2 m/s to avoid flushing. In general, as the quicksand fraction size increases, the bailer's performance drops.

  To date, no need has been identified to use sleeve-type bailers in wells with a diameter of 105–120 mm following Bailer B100 (B100 quicksand bailer). This is because the remaining quicksand has a fluid consistency that is easily cleared by submersible vibration pumps.

Application:

  Lower Bailer B100 (B100 quicksand bailer) to the quicksand and screw it in to a depth of no more than 45–50 cm. While screwing, lift the bailer slightly from time to time to facilitate the process and ensure it is not stuck and can be lifted freely.

  When lowering the bailer through the casing pipe, ensure the casing is advanced (pushed down) while lifting the bailer.

  If the bailer remains clean after a slow lift through the water column, the rest of the quicksand can be pumped out using a submersible vibration pump. Monitor the consistency of the pumped mixture to ensure the quicksand is not too dense, which could damage the pump. A sharp drop in discharge volume indicates that the mixture is thickening. If this occurs, resume using the bailer. This recommendation applies to boreholes with an internal diameter of 105–120 mm and a depth of up to 12 meters.

Bailer B130 (B130 quicksand bailer)

Technical parameters:

  Length: 71.5 cm, weight: 4.1 kg.

  The minimum casing pipe diameter that can be used is 140 mm.

  The maximum volume of raised quicksand is 4.5 liters.

Designed for loosening and lifting dense sand and fine gravel with fractions up to 20 mm. It can also capture larger fractions up to 40 mm, but this causes a sharp drop in the bailer's filling efficiency. When working through the water column in non-fluid quicksand (for example, clean sand without clay impurities), the lifting speed must not exceed 0.2 m/s to avoid flushing. Otherwise, subsequent use of Bailer A will be required.

Application:

  Lower Bailer B130 (B130 quicksand bailer) to the quicksand and screw it in to a depth of no more than 45–50 cm. While screwing, lift the bailer slightly from time to time to facilitate the process and ensure it is not stuck and can be lifted freely.

  When lowering the bailer through the casing pipe, create a downward draft on the pipe while lifting the bailer.

  If, after a slow rise through the water column, the bailer is clean, it is better to remove the remaining quicksand using Bailer A. In this case, using a vibration pump is not as effective as in wells with an internal diameter of 105-120 mm, due to the large amount of remaining silt.

Selection of bailers (quicksand bailers) and recommendations for casing use

A simple drilling scenario

  When drilling a well, loam with inclusions of solid rock up to 5 cm is removed; in this case, you will not need any equipment other than that shown in the examples.

  You reach the aquifer and the water level in the well begins to rise sharply. Sometimes the water does not rise, but once it appears, it cannot be pumped out. This also means you have reached the aquifer.

  In these cases, it makes sense to deepen another meter, and preferably two, if possible, below the water table and lower the casing.

Crucially, once drilling reaches unstable formation, do not stop or postpone completion until the next day. The borehole may collapse overnight. If this happens, all previous work will be in vain.

Quicksand

  If you got a quicksand when drilling a well, a conventional auger will not just fail to pass through it - you will not even succeed in deepening the hole. It is necessary to use a quicksand bailer.

  There are three main options.

A. True quicksand (mushy clay-sand suspension).

  True quicksand requires pressing the casing down first. Then, the quicksand is removed from inside the casing using Bailer A or a vibration pump, depending on the borehole diameter.

B. False quicksand (water-saturated sand); the well before the start of the quicksand is dry.

  False quicksand is removed using a B-series bailer with a simultaneous downward draft on the casing (as shown in the video). The bailer size is selected depending on the borehole diameter.

C. False quicksand (water-saturated sand) while the well is filled with water (for example, as a result of high groundwater).

 In this case, the quicksand is removed using a B-series bailer while simultaneously advancing the casing. However, some sand will inevitably slip out of the bailer during recovery. Once the remaining sand is loosened, it can be extracted using either Bailer A or a vibration pump, depending on the borehole diameter.

Ultimately.

  The choice of a bailer or a quicksand bailer can be most accurately done after you have stumbled upon this quicksand, if ever you found it. Since the well is drilled very quickly and eight-meter wells, for example, for a work shift, you can drill a couple of them (they are drilled this quickly only with our auger); this makes it a justified approach.

To avoid wasting time on buying additional equipment later, you can add a B-series bailer to your standard kit right away. This significantly increases the likelihood of successfully drilling a borehole through sandy quicksand. Select the specific bailer model based on your planned borehole diameter.

Recommendations for use of the casing pipe:

Our quicksand bailers are designed for casing pipes with a minimum internal diameter of 100 mm; these are the most common PVC sewer pipes. The casing may be of larger diameter. This is not of fundamental importance, since quicksand is a formless phenomenon. However, the greater the difference between the inner diameter of the casing and the diameter of the quicksand bailer, the slower the drilling process.

  If a PVC 160×4.0 casing pipe is selected, it is necessary to bear in mind the following circumstance. Only the smooth part of the section of such pipe can be loaded into the quicksand. These pipes are produced in sections from 1 to 6 meters long. Therefore, when entering a long section of quicksand, you will need shorter 1-meter sections. For example, working through a protruding 2-meter section is extremely difficult.

  Wells may have a tendency to silt. The connecting rods and quicksand bailers used to construct the well ensure that you can clean it and restore its water yield at any time. For normal re-use of equipment, before starting storage, it is necessary to wash off the dirt and lubricate the connection joints with grease.