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Recently, Eta Devices, an independent company established by some engineers from MIT, claimed that they have found a battery-side solution and can use batteries more effectively. In fact, they are developing ultra-efficient power amplifiers. technology. This technology will greatly improve the performance of the battery on the smart phone, may double the life, especially in the LTE network only spend half of the existing electricity.
Eta Devices stated that most power amplifiers use transistor components. They basically have two kinds of magic in standby and output signals in smart phones. Even in standby mode, there will be a lot of power consumption, and the battery efficiency will be greatly reduced, which will waste at least 65% of the time. Electricity, which is the most power-consuming part. If you can reduce the standby power consumption, the battery life is no doubt longer.
Eta has developed something called the "Electronic Gearbox," which can detect voltage at any time, properly regulate the minimum voltage, and speed up to 2 million times per second. Eta also said that when smart phones send or receive data, they may use a single power amplifier on their smartphones to handle CDMA, GSM, and LTE. In contrast, the iPhone 5 currently uses five such amplifiers.
Vanu Bose, chief executive officer of Vanu, a wireless communications company, said that "Over the years, we have really not seen significant progress in this area (battery technology). But today, if the battery efficiency is increased by 30%-35%, people will feel quite similar. Wonderful, but their new technology can be more than doubled."
Eta Devices engineers Joel Dawson and David Perreault are continuing to develop the technology in the laboratory. They are determined to demonstrate this new technology at the next Mobile World Congress MWC 2013 and plan to commercialize it in 2013.
With the continuous development of drilling production, the use conditions of drilling rigs have become more and more diversified, and various types of drilling rigs have appeared accordingly. Factors affecting the type and composition of drilling rigs include drilling method, drilling depth, borehole size and drilling tool size, and drilling area conditions (such as electricity or fuel, transportation, and meteorological conditions).
1. According to drilling method
(1) Impact drilling rigs, such as wire rope impact drilling rigs (drilling rigs), vibration drilling rigs, etc.
(2) Rotary drilling rigs, such as those used in rotary drilling.
(3) Downhole power drilling tools, such as rotary drilling tools, turbo drilling tools, screw drilling tools, electric drilling tools, etc.
2. Divided by drilling depth
(1) Ultra-deep well drilling rig. It adopts a drilling rig with a diameter of 114 mm drill pipe, a nominal drilling depth range of more than 7000 meters, and a maximum hook load of more than 4,500 kN.
(2) Deep well drilling rig. The drill rod is 114 mm in diameter, the nominal drilling depth is 4000-7000 meters or more, and the maximum hook load is 2250-4500 kN or more.
(3) Drilling rigs for medium and deep wells. It adopts a drilling rig with a diameter of 114 mm drill pipe, a nominal drilling depth range of 1500-4000 meters or more, and a maximum hook load of 900-2250 kN or more.
Three, according to power equipment
(1) Diesel Engine-driven drilling rigs, which use diesel engines as power through mechanical transmission or hydraulic transmission.
(2) AC driven drilling rig, suitable for use in oil fields with industrial power grids.
(3) The drilling rig is driven by direct current, and the working unit is driven by a direct current motor.
Fourth, according to the driving mode
(1) Drive alone. Each working machine is driven by generators of different sizes, which are mostly used for electric drive. The transmission is simple and easy to install, but the power utilization rate is low and the total equipment mass is large.
(2) Unified drive. The three working units of drawworks, drilling Pump and turntable are driven by the same power unit. Most drilling rigs use this scheme. The unified drive can also include only one drilling pump, and the other drilling pump is driven separately. The unified drive drilling rig has high power utilization and can be adjusted mutually when the engine fails, but the transmission is complicated, installation and adjustment are troublesome, and the transmission efficiency is low.
(3) Group drive. The combination of power is between individual drive and unified drive. There are two options for three working machines. The power utilization rate of this kind of drilling rig is higher than that of a single drive, and the transmission ratio is simple to drive in a unified manner. Two sets of working machines can also be installed on different heights and scattered sites.
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