Original title Have you ever used these fishing methods of drill pipe and drill bit In the process of pile foundation construction with rotary excavator big bore the accidents of hole collapse drill burying and drill holding occur from time to time but the causes accident conditions and site conditions of rotary excavator accidents are not the same so the measures taken are not the same sometimes several treatment methods may be needed Xiaobian focuses on describing the treatment method of buried drill and describes the treatment tools in detail hoping to communicate with peers After the accident of burying or holding the drill bit the mud performance shall be adjusted in time to prevent the accident from continuing to expand and the causes shall be analyzed in time to take corresponding measures so as not to miss the best treatment opportunity The treatment of burying drill can be summarized as methods and steps such as "clearing penetrating jacking blasting expanding fishing smashing and digging" I Treatment of Sediment "Clear" means to clear slag and wash holes Slag removal can be carried out by positive and negative circulation high pressure jet or well washing pipe air dth rock bit compressor Sludge removal shall be carried out according to the mud quality of the formation and the hole cleaning equipment used so as to avoid the occurrence of secondary hole collapse in the process of drilling Use the air compressor to wash the hole II Fishing of drill pipe bit (1) In some cases the key to deal with the accident of burying the drill bit is to dredge the channel between the bottom of the hole and the upper part of the drill bit so that the bottom and the upper part of the drill bit form a communicating vessel to avoid the piston effect that is "through" In order to form a communicating vessel several holes deeper than the accident hole are generally drilled at the edge of the hole and high-pressure rotary spraying is used for swing spraying It is used to form a passage rotate the power head and increase the pulling force of the main rope at the same time and it is possible to lift the drill rod and the drill bit together Some treatment schemes adopt the combination of reverse circulation drilling rig and reaming bit (2) "Jacking" means jacking the drill pipe with a Jack which is the most commonly used force method to deal with buried drill A solid platform shall be provided for the use of the Jack and the Jack force application plate shall be welded on the drill pipe Weld the 3cm ribbed plate with the drill rod firmly weld the top plate with the ribbed plate and the drill rod and connect the two top plates The I-beam shall be 60x100cm and connected with connecting plate The Jack control system shall be interlocked to pressurize
The reaming bit can be modified by using a casing with a diameter 10 cm smaller than the original casing (5) The force method of "sleeve clamp and hook" can be used to salvage the drill bit or drill pipe of the mining dth bit rotary excavator If the inner core of the drill pipe is broken the drill pipe and the drilling bucket are left in the hole After reaming and cleaning the hole the diver can cover the drill pipe and drilling tool When the buried depth is shallow the drill rod can also be covered with a steel bar support If the drill rod is buried deeply after reaming and clearing the sediment it can be salvaged with a pallet Fisher When the sediment is thick it can also be made into a looper The elevator is fixed on three sections of drill rod with a self-made steel pin and the pot bottom Fisher is also fixed on the same section of drill rod The height of the straight wall of the Fisher shall be greater than the height of one end of the drill bit so as to ensure that the wire rope welded in it can be cleaned in place During slag removal the wire rope sling can be fixed on the power head to ensure the synchronization of the rope sling and the drill pipe When the ordinary drill bit is buried shallowly the force of the lower hook can also be used The welded rigid rod can be used to directly hook the beam of the buried drill bucket and lift the drill bit (6) If the depth after blasting can not meet the requirements or the drill bit is broken in the hole the percussion drill can be used to smash the damaged drill bit and carry out percussion drilling to finish the hole (7) In some areas the water level is deep and the buried depth of the drill pipe is shallow so the buried drill can be treated by digging under the ground The size of the hole dug manually should be about 20cm larger than the hole diameter Finally the circumference of the drill bit can be hollowed out with Luoyang shovel so that the drill bit can be dug out smoothly As a basic distributor of XCMG Nanjing Infinite has sold various series and models of rotary drilling rigs of XCMG to customers in Jiangsu Zhejiang Shandong Fujian Sichuan and other regions and has served in the construction of Lianyungang-Xuzhou high-speed railway Anjiu high-speed railway Weilai high-speed railway and various piles At the same time it has more than 50 sets of self-owned equipment 220 280 360 400 and other types of rotary drilling rigs for rent and the leasing business is all over the country Return to Sohu to see more Responsible Editor wt-dthtools.com