{"id":7453,"date":"2025-05-14T18:01:39","date_gmt":"2025-05-14T10:01:39","guid":{"rendered":"https:\/\/www.amedrillsupply.ca\/?post_type=product&#038;p=7453"},"modified":"2025-08-21T07:35:28","modified_gmt":"2025-08-20T23:35:28","slug":"symmetric-overburden-casing-drilling-tools","status":"publish","type":"product","link":"https:\/\/www.amedrillsupply.ca\/fr\/symmetric-overburden-casing-drilling-tools\/","title":{"rendered":"Outils de forage sym\u00e9trique pour les morts-terrains"},"content":{"rendered":"<h2>Ame Drill Symmetric Overburden Casing Drilling Systems<\/h2>\n<p><a href=\"https:\/\/www.amedrillsupply.ca\/fr\/casing-drilling-system\/\">Casing drilling<\/a>ou\u00a0<a href=\"https:\/\/www.amedrillsupply.ca\/fr\/casing-while-drilling\/\">casing while drilling (CWD) process<\/a>, is a concept that combines two time-consuming processes, drilling and casing, together, performing them at the same time. During the CWD process, powered by a\u00a0<a href=\"https:\/\/www.sinodrills.com\/dth-hammer-drill-bits\/\" target=\"_blank\" rel=\"noopener\">Marteau DTH<\/a>, a central piloting bit drives a ring bit to drill a hole wide enough for a casing tube to slide down; drilling and casing processes are therefore performed at the same time.<\/p>\n<p>Symmetric is a system comprised of an ingeniously simple concentric\u00a0<a href=\"https:\/\/www.amedrillsupply.ca\/fr\/geotechnical-drilling-methods\/\">method of drilling<\/a>\u00a0through overburden with casing. \u00a0Symmetric can drill straight holes at any angle (including horizontal) and to depths beyond 100 meters. Working together as one efficient drill bit, the components are made up of:<\/p>\n<p>\u2022 A pilot bit with large internal flushing holes and external flushing grooves.<\/p>\n<p>\u2022 Symmetrical ring bit (reamer) with internal bayonet coupling<\/p>\n<p>\u2022 Casing shoe for driving of casing.<\/p>\n<p>\u2022 The pilot bit is attached to any common DTH hammer shank or top hammer rod thread.<\/p>\n<p>The casing shoe is welded to the casing. The pilot bit and ring bit are locked together by the bayonet coupling. They drill a hole large enough to allow the casing to be pulled into the hole. The pilot bit and ring bit rotate with the drill string, while the casing shoe and casing do not rotate. When the required depth is reached, the pilot bit is unlocked by a slight reverse rotation of the drill string.<\/p>\n<p>The drill string and pilot bit will be retrieved through the casing, the ring bits and casing shoe will be left in the hole for a permanent casing system. Also, the ring bits and casing can be retrieved through the special design of the ring bits and casing shoe. We can manufacture both permanent Symmetric and Retrievable Symmetric systems, which can meet your comprehensive requirements.<\/p>\n<h2>Features of Symmetric Overburden Casing Drilling Tools<\/h2>\n<div id=\"model-response-message-contentr_d2a84e57fbd175db\" class=\"markdown markdown-main-panel stronger enable-updated-hr-color\" dir=\"ltr\">\n<p>The Symmetric Overburden Casing Drilling Tool offers a highly efficient and reliable solution for drilling through unconsolidated ground, characterized by its comprehensive tooling and robust construction.<\/p>\n<ul>\n<li><b>Complete Types of Drilling Tools Suitable for Casing Tubes with Various Diameters:<\/b>\u00a0The system provides a full range of drilling tools, ensuring compatibility with casing tubes of diverse diameters. This versatility allows for effective drilling in various overburden conditions and project specifications.<\/li>\n<li><b>Good Stability and Reliability Granted by Premium Alloy Steel Material and Fine CNC Manufacturing Process:<\/b>\u00a0The components of the system are crafted from premium alloy steel and manufactured using precise CNC processes. This commitment to material quality and manufacturing accuracy ensures exceptional stability and unwavering reliability during operation, minimizing operational disruptions.<\/li>\n<li><b>Cost-effectiveness Realized by Mass Production:<\/b>\u00a0Through efficient mass production techniques, the Symmetric Overburden Casing Drilling System achieves significant cost-effectiveness. This allows for a high-quality product at a competitive price, providing excellent value without compromising performance.<\/li>\n<\/ul>\n<\/div>\n<h2>Applications of Symmetric Overburden Casing Drilling Tools<\/h2>\n<p>Symmetric overburden casing drilling tools find wide applications in various fields. In <a href=\"https:\/\/www.sinodrills.com\/water-well-and-geothermal-drilling\/\" target=\"_blank\" rel=\"noopener\">forage de puits d'eau<\/a>, they ensure stable wellbore formation and prevent collapse to secure water yield. For geothermal well drilling, such systems withstand high-temperature and high-pressure environments, guaranteeing efficient heat exchange pipe installation.<\/p>\n<p>In foundation piling, they enhance pile positioning accuracy and load-bearing capacity by stabilizing the borehole. During geological prospecting, they enable safe and reliable sampling in complex strata, providing accurate data for geological analysis. These systems excel in solving overburden instability problems, improving construction efficiency and project quality across different engineering scenarios.<\/p>\n<h2>Permanents of Symmetric Overburden Casing Drilling Tools<\/h2>\n<p>1. \u00a0When starting drilling, the central bit drives the ring set to drill a hole wide enough for the casing tube to slide down.<\/p>\n<p>2. \u00a0When arriving at the bedrock, reverse the rotation of the tools and pull out the central bit from the hole, leaving the ring set in the hole.<\/p>\n<p>3. Pour concrete and proceed to the next steps.<\/p>\n<h2>Retrievable<\/h2>\n<p>1. \u00a0When starting drilling, the central bit drives the ring set to drill a hole wide enough for the casing tube to slide down.<\/p>\n<p>2. \u00a0When arriving at the bedrock, reverse the rotation of the drill string and pull out the central bit from the hole.<\/p>\n<p>3. \u00a0Pull the casing tube out with the ring set while pouring concrete.<\/p>\n<h2>Structure of Symmetric Overburden Casing Drilling Tools<\/h2>\n<table>\n<tbody>\n<tr>\n<td colspan=\"6\">Technical Parameter Table of Standard Symmetric Casing Tool With Reamer for DTH hammer( Rectangle Lock )<\/td>\n<\/tr>\n<tr>\n<td>A<\/td>\n<td>B<\/td>\n<td>C<\/td>\n<td>D<\/td>\n<td><\/td>\n<td>E<\/td>\n<\/tr>\n<tr>\n<td>Outer Dia. Of Casing Tube (mm)<\/td>\n<td>Max. Wall Thickness (mm)<\/td>\n<td>Outer Dia. Of Ring Bit (mm)<\/td>\n<td>Inner Dia. Of Ring Bit (mm)<\/td>\n<td>Max. Dia. Of Pilot Bit (mm)<\/td>\n<td>Suitable hammer (inches)<\/td>\n<\/tr>\n<tr>\n<td>114<\/td>\n<td>8<\/td>\n<td>126<\/td>\n<td>87<\/td>\n<td>85<\/td>\n<td>3.5\u201d<\/td>\n<\/tr>\n<tr>\n<td>127<\/td>\n<td>10<\/td>\n<td>138<\/td>\n<td>95<\/td>\n<td>94<\/td>\n<td>3.5\u201d<\/td>\n<\/tr>\n<tr>\n<td>139.7<\/td>\n<td>5<\/td>\n<td>160<\/td>\n<td>116.5<\/td>\n<td>115<\/td>\n<td>4\u201d<\/td>\n<\/tr>\n<tr>\n<td>152.4<\/td>\n<td>5.5<\/td>\n<td>170<\/td>\n<td>126<\/td>\n<td>124<\/td>\n<td>5\u201d<\/td>\n<\/tr>\n<tr>\n<td>168.3<\/td>\n<td>5.5<\/td>\n<td>190<\/td>\n<td>142<\/td>\n<td>140<\/td>\n<td>5\u201d<\/td>\n<\/tr>\n<tr>\n<td>177.8<\/td>\n<td>7<\/td>\n<td>200<\/td>\n<td>153.5<\/td>\n<td>152<\/td>\n<td>6\u201d<\/td>\n<\/tr>\n<tr>\n<td>193.7<\/td>\n<td>5.5<\/td>\n<td>220<\/td>\n<td>167<\/td>\n<td>165<\/td>\n<td>6\u201d<\/td>\n<\/tr>\n<tr>\n<td>219.1<\/td>\n<td>6.5<\/td>\n<td>246<\/td>\n<td>190.5<\/td>\n<td>188<\/td>\n<td>6\u201d<\/td>\n<\/tr>\n<tr>\n<td>273<\/td>\n<td>8<\/td>\n<td>303<\/td>\n<td>240<\/td>\n<td>238<\/td>\n<td>8\u201d<\/td>\n<\/tr>\n<tr>\n<td>323.9<\/td>\n<td>10<\/td>\n<td>350<\/td>\n<td>282<\/td>\n<td>280<\/td>\n<td>10\u201d<\/td>\n<\/tr>\n<tr>\n<td>406<\/td>\n<td>12.7<\/td>\n<td>442<\/td>\n<td>350<\/td>\n<td>345<\/td>\n<td>12\u201d<\/td>\n<\/tr>\n<tr>\n<td>508<\/td>\n<td>12.7<\/td>\n<td>545<\/td>\n<td>450<\/td>\n<td>445<\/td>\n<td>18\u201d<\/td>\n<\/tr>\n<tr>\n<td>560<\/td>\n<td>12.7<\/td>\n<td>595<\/td>\n<td>500<\/td>\n<td>495<\/td>\n<td>18\u201d<\/td>\n<\/tr>\n<tr>\n<td>610<\/td>\n<td>12.7<\/td>\n<td>645<\/td>\n<td>550<\/td>\n<td>545<\/td>\n<td>18\u201d<\/td>\n<\/tr>\n<tr>\n<td colspan=\"6\">Order Guide: A + B + C + D +\u00a0E<\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"excerpt":{"rendered":"<p>Les solutions excentriques sont les plus \u00e9conomiques gr\u00e2ce \u00e0 leur conception ing\u00e9nieuse. L'aile d'al\u00e9sage du tr\u00e9pan est r\u00e9cup\u00e9rable, ce qui permet de la r\u00e9utiliser pour le trou suivant. Cette caract\u00e9ristique de recyclage r\u00e9duit consid\u00e9rablement les co\u00fbts d'\u00e9quipement et minimise les d\u00e9chets de mat\u00e9riaux, ce qui en fait un choix rentable pour les projets n\u00e9cessitant des forages r\u00e9p\u00e9t\u00e9s.<\/p>","protected":false},"featured_media":7454,"template":"","meta":[],"product_brand":[],"product_cat":[27],"product_tag":[],"class_list":{"0":"post-7453","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-down-the-hole-dth-drilling-tools-1","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/www.amedrillsupply.ca\/fr\/wp-json\/wp\/v2\/product\/7453","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.amedrillsupply.ca\/fr\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.amedrillsupply.ca\/fr\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.amedrillsupply.ca\/fr\/wp-json\/wp\/v2\/media\/7454"}],"wp:attachment":[{"href":"https:\/\/www.amedrillsupply.ca\/fr\/wp-json\/wp\/v2\/media?parent=7453"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.amedrillsupply.ca\/fr\/wp-json\/wp\/v2\/product_brand?post=7453"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.amedrillsupply.ca\/fr\/wp-json\/wp\/v2\/product_cat?post=7453"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.amedrillsupply.ca\/fr\/wp-json\/wp\/v2\/product_tag?post=7453"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}