Lifting tool basic mechanism
Various lifting tools have different uses and great differences in construction, but all have a lifting mechanism that realizes the basic action of lifting. The material can be lifted and lowered by a flexible member such as a wire rope or a lifting chain, or it can be lifted by a screw or other rigid member.
Lifting tool performance parameters
The most important performance parameters that characterize the basic working ability of a lifting tool are the lifting weight and the working level. 1 weight refers to the maximum weight of the weight that is allowed to be lifted under the specified working conditions, that is, the rated lifting weight. Generally with a permanent magnet chuck (see permanent magnet jack), the weight should also include the weight of the permanent magnet chuck. 2 The working level is a performance parameter that reflects the overall working condition of the lifting tool, and is an important basis for designing and selecting the lifting tool. It is determined by the total number of work cycles and load conditions that the lifting tool needs to complete during the required period of use. For the lifting tools with strong regularity and repetitive operation, such as electric hoist for loading and unloading cargo on the dock, chain hoist for overhead warehouse and hopper elevator for feeding blast furnace, the working cycle is also an important parameter. The duty cycle refers to the time required to complete a work cycle, which depends on the speed of the organization and is related to the handling distance. The above lifting tools sometimes use productivity as an important parameter, and are usually expressed in terms of the amount of lifting done per hour.
Drilling BOP And Control System
During oil drilling, it is installed on the wellhead casing head to control high-pressure oil, gas, and water blowout devices. When the oil and gas pressure in the well is high, the blowout preventer can close the wellhead (shut down). When the heavy mud is pressed into the drill pipe, there is a four-way under the ram, which can replace the mud invaded by gas, increase the pressure of the liquid column in the well, and suppress the ejection of high-pressure oil and gas.
Its types are divided into ordinary blowout preventer, universal blowout preventer and rotary blowout preventer. The universal blowout preventer can be activated in emergency situations to deal with any size of drilling tools and empty wells; the rotary blowout preventer can realize the blowout and drilling operation. In deep well drilling, in addition to two ordinary blowout preventers, universal blowout preventers and rotary blowout preventers are often added, so that three or four combinations are installed at the wellhead.
Annular Blow-out Preventer Annular Blow-out Preventer is usually equipped with a large gate with a ram-type blowout preventer. During operation, a sealed annular space is formed between the pipe string and the wellbore. When there is a pipe string in the well, it can also be separated The well is closed, but it will not work after several times of use, and long-term shut-in use is not allowed.
Drilling BOP And Control System,Double ram blowout preventer, single ram blowout preventer, annular blowout preventer, blowout preventer control system
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