SYMMETRIX – Overburden Drilling by Atlas Copco Welltech AB. The optimal choice when drilling medium to deep ( 60 m) holes and casing pipe is left. Atlas Copco casing advancement systems are available in versions for top hammer The Symmetrix and Elemex systems are part of a total overburden drilling. The Symmetrix overburden drilling system is a patented system comprised of an ingeniously simple concentric method of drilling through overburden with casing .
|Published (Last):||6 May 2009|
|PDF File Size:||6.27 Mb|
|ePub File Size:||12.63 Mb|
|Price:||Free* [*Free Regsitration Required]|
Geotechnical Core Drilling Tools. Reverse circulation hammers The key criteria our customers wanted from our reverse circulation drills were simplicity, performance and reliability.
The choice of solution depends on several factors, including ground conditions and application. Symmetrix handles casings from 76 to 1, mm 3 to 48 into almost any depth.
Aircontrol and minimized overdrilling is essential to reduce these risks.
The unique design of the pilot bit directs the air over the drill bit surface, reducing air leakage into the ground. Elemex — for improved air control The Elemex casing advancement system is the preferred system for minimizing the risk of settlements in surrounding strucutures.
The unique design of the drill bit directs the air over the drill bit surface reducing the air leakage into the ground. Whether used in ground with big boulders, inclined competent layers, or hard bedrock Symmetrix drills until the required depth is reached.
Symmetrix and Elemex
Casing Types Permanent Casing There are different applications where permanent casing is the preferred choice, the most common are water wells, geothermal wells, foundation works, and pipe roofing. The choice of solution depends on several factors, including ground conditions and application. A casing shoe welded to the casing pipe, which is pulled down by the impact of the hammer and pilot bit.
The casing advancement system is comprised of an ingeniously simple method of drilling through overburden while advancing the casing into the hole at the same time.
They have aglas very popular with tophammer drillers and are available in three different sizes from 38 mmm to 51 mm threads. Use same ring bit set for both pilot bits.
Elemex Retrievable Ring Bit System. Applications Casing advancement systems can be used in a wide range of applications where you need to drill in difficult ground conditions.
Designed for short holes and is available with both thin and thick casing wall. Accessories for Casing Advancement Systems. Easier detaching of the pilot from the ring symmtrix set. Atlas Copco Symmetrix offers a retrievable ring bit system for tophammer drilling, an all-round overburden drilling system for holes of any depth or size.
There are two different assemblies offered by Atlas Copco for the system components. When changing the pilot bits you only need one ring bit set for talas pilot bits, and you will save time as well as money.
Casing advancement systems are often used to drill the holes through the overburden, keeping symnetrix hole open during installation of the heat exchange system and minimizing the impact on surrounding structures. The system adds value whether the mission is to install foundation, support elements, or simply case the hole in collapsing formation. Symmetrix systems can be used in a multitude of applications such as micropiling, underpinning, anchoring, marine work and horizontal drilling.
The three main components of the system are A pilot bit, which drills the center part of the hole and guides the drill string. Support Gentle text on who to contact when things go wrong.
Casing Advancement Systems (Symmetrix / Elemex)
Retrievable system designed to allow drilling shallow rock sockets below the casing with the pilot bit. Permanent Casing There are different applications where permanent symmetrrix is the preferred choice, the most common are water wells, geothermal wells, foundation works, and pipe roofing.
Foundation work Stringent demands on productivity, high drilling accuracy, and the ability to drill inclined piles for foundation work make casing advancement systems increasingly popular for both end bearing and friction piles. Symmetrix handles casings from 76 to 1, mm 3 to 48 in to almost any depth.
Casing Advancement Systems
The key criteria our customers wanted from our reverse circulation drills were simplicity, performance and reliability. We even offer environmentally friendly water-lubricated hammers and the reverse circulating RC hammers aimed at Green Field exploration. Pipe roofing Pipe roofing is a method to pre-reinforce the ground ahead of a tunnel face to ensure that excavation can proceed safely.
Setup two consits of a factory assembled ring bit set integrated ring bit and casing shoe and a pilot bit.