Apparatus for drilling into hard groundThe invention concerns an apparatus for drilling trenches (42) in the ground\ncomprising a frame (14), a drilling assembly comprising a horizontal support\nplate (18) connected to the lower end of the frame, said plate supporting\ndrilling tools (24, 26...
fluid under pressure into said inflatable elements thereby applying a force between said main frame and the walls of the trench, and means enabling said fluid under pressure to escape from said inflatable elements whereby no force is transmitted between said main frame and the walls of the trench...
Scaling is the removal of insecure blocks of rock from the back, the sidewalls, and the face. It is also regarded as preparation for shotcrete and/or rock bolts. Due to its danger, the safety of workers must be carefully considered. Procedures vary throughout the world, from manual to co...
My curiosity was satisfied by one of the displays depicting the process of turning bamboo into pipe. Each length of bamboo was cut in half, down its length. The segment walls were removed, and the insides of the bamboo further hollowed out to create a smooth inside surface of constant inter...
Never pull hard on pipe in a tight gas drilled hole. If there are cuttings around the bit or collars, that will jam the cuttings even tighter, and if it is a key seat it will pull into it tighter. With, tight hole, keep the gas on and move the pipe until it comes free. Any ...
Because you could be drilling into electrical cords, plumbing or sewage lines, or anything else that will be hard to replace and could cause a mess inside your walls. Walker says, ‘Use a stud sensor (such as theFranklin Sensors ProSensor 710+ Stud Finder from Amazon). This will tell you...
The use of new intelligent techniques in designing retaining walls. Engineering Computations. 2019;35:1-12 57. Zhao Y, Noorbakhsh A, Koopialipoor M, et al. A new methodology for optimization and prediction of rate of penetration during drilling operations. Engineering Comp...
the cutting insert lies in a receptacle that runs through the base body at a right angle to the latter's longitudinal axis and is open toward the drill tip, whereby the cutting insert is in contact by means of two diametrically opposite contact surfaces against the side walls of the receptac...
24 However, the electrolyte flux divided into each tube electrode is governed by dimensions of the structure and the distribution of the electrolyte-dividing manifold. Moreover, it is hard to measure and control the electrolyte flowrate. As described in these literatures, most attention has focused...
This implies that any pipe section can be considered as straight section if the curvature of that section is less than that necessary to make the pipe deviate beyond the walls of the hole, which is roughly 1.5 times larger in diameter than the pipe itself. The curves are typically sag ...