Inflatable packers

 A pressure data logger is a device that integrates a pressure measuring instrument with a data storage device, or independent software and external interface to easily facilitate the recording and playback of pressure measurements. A pressure data logger can easily be installed by the individual user to start recording at a pre-determined time, at a predetermined sample rate or both. Most modern pressure data loggers record up to 500 pressure measurements at one time. A pressure data logger with an optional wireless remote control allows for the monitoring and analysis of the pressure data. A good example of a pressure data logger that can be used for temperature data logging is the Digital Air Sensor (DAAM) Plus Maticon. The DAAM Plus Maticon is available with an optional infrared receiver that can monitor and log ambient temperature, humidity variations in up to 50 zones. The DAAM Plus Maticon also features a user-programmable button and smart key pad for quickly entering data. ...

Block caving is a form of quarrying where materials are dug from deep underground. Caving involves digging through earth to reach rocks and other substances that are above ground. There are many types of block caving , including dry holes, wet holes, sub-surface caving. Underground hard rock caving refers to different underground excavation techniques typically used to excavate metals containing precious metals like gold, silver, lead, iron, copper and zinc, but also uses the same methods for digging up ores of gemstones like rubies or diamonds.  This technique usually begins with a hole being drilled in the ground near an entrance way or by the side of a mountain stream. The hole is then filled with either gravel or dirt with water being pumped into it to soften the soil. The process of underground caving may also include the use of pumps and machinery. This equipment can be as simple as a hammer and chisel or as complex as a bulldozer. Some of these equipments are powered by elec...