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Global warming is a topic of great concern all over the world. The current CO2 capture methods, such as absorption, cryogenic separation, adsorption, etc., may have some deficiencies in capture cost and device investment. A novel solvent- absorption coupled membrane-desorption process is expected to be one of candidate with industrial feasibility. The membrane reported in the literature has great...
With the constant updates of the drilling equipments, the traditional portable drilling simulator also need to be improved and updated timely to meet the skill training requirements of the drilling site operators and the technicians. On the basis of the existing portable simulator, this subject has updated the console, the hardware controller and the software system, also has complete the design of...
In view of sustainable development, it is imperative that mineral admixtures be used to replace cement in the concrete industry. This paper presents a laboratory study on the performance of steam cured concrete by adding mineral admixtures. Performance of the concrete mixes was determined with short and longterm tests, which include compressive strength, dry shrinkage, anti-chloride permeability and...
This paper presents a laboratory study on the effect of rubber powder on the performance of thermal insulating mortar with glazed hollow bead. The test results show that with the dosage of rubber powder increases, the consistency of thermal insulating mortar decreases. However, the apparent density is adversely affected, and thermal conductivity increases firstly and decreases laterly. Rubber powder...
Choke killing is a common method to control well kick and implement well pressure control of oil and gas in the process of drilling. By adjusting choke valve opening, casing pressure and standpipe pressure can be controlled to maintain pressure balance in well and prevent well blowout. In this design, fuzzy control and expert experiences are effectively applied in parameter self adjusting in the killing...
As drilling technology improves, deep well drilling rig and offshore oil drilling at home and abroad are mostly equipped with top drive drilling devices. But drilling simulators at home and abroad are simulation against traditional rotary drilling system, which is out of proportion to the present situation. So we need to develop new drilling simulators based on top drive drilling system urgently to...
Steam-cured concretes are used widely in the precast industry to speed up production. The drying shrinkage of steam-cured concretes is closely related with its durability. To reduce the drying shrinkage of steam-cured concretes, this paper investigated the values of drying shrinkage of steam-cured concretes with various mixes by dial indicators fixed in a frame and the effect of mix parameters on...
In order to solve the problem of data transmission slow and poor real-time control in the distributed system composed of PC extended card CP 5611 and multiple plc s7-200, their communication patterns and RS-485 protocol standards are analyzed. PC and multiple PLC build distributed application system through serial port to convert RS232 to RS485. Slave PLC based on free-port mode, custom command word...
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