Tube Water Well Drilling Reno involves three distinct operations. These include drilling the bore hole, installing the casing and well screen, and developing the well to ensure sand-free operation at maximum yield. Where artificial gravel packing is required, the operation is considered part of well-screen installation. Tube wells may be bored, jetted, driven or drilled. A bored well is one in which excavation is carried out by means of hand or power augers. In a jetted tube well, excavation is done with a high velocity jet of water. A driven well is constructed by driving a pointed screen into the ground and adding casing pipes to the drive point as it is being driven into the ground. In a drilled well, excavation is done either by percussion or rotary drills. Each method of construction has its own advantages and adaptability.
Boring, driving and jetting
Boring, driving and jetting are usually adopted for constructing small-sized wells used in domestic water supply in regions with alluvial formations. Boring is commonly done by means of an earth auger turned by hand. Power augers are also sometimes used. Boring is adapted to situations where ground water is at shallow depths and where the requirement for water is not high. Hand augers can be used to penetrate clay, silt and some sand, where the open hole will be able to stand up to depths of 7-10 m. The size of the hole may vary from 5-50 cm.
Water Well Drilling Reno or boring is done by spiral or worm augers. The hand auger consists of a shaft or pipe, with a wooden handle at the top and a bit with curved blades at the bottom. It is provided with shaft extensions and couplings. Boring is started by forcing the blades of the auger into the soil, while turning the tool. When the space between the blades is full of soil, the auger is lifted and emptied. The operation is repeated until the hole is bored to the required depth. Sometimes, during boring, stones or boulders may be encountered which will prevent further penetration. In such situations, a spiral, also called a ramshom, is used to fish out the obstruction. The spiral is turned in a clockwise direction. It will turn around the stone or boulder, which can be lifted to the surface. The regular auger is then replaced and boring continued. Wells up to 4 to 5 m can usually be bored without the use of a tripod. For larger depths, a tripod with a pulley block at the top is provided to insert larger auger rods into the hole and remove them without damage. Power augers are used to bore wells of 20-80 cm diameter. The augers are rotated, raised and lowered by power-driven mechanisms. Bored wells are completed by installing well screens in the water-bearing formation and developing the well.
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