Introduction to commonly used derricks in oil drilling
Dec 28,2024
The commonly used derrick in oil drilling is an important device used to place the crown block, traveling block, and hook and other hoisting equipment and tools. It can withstand the loads generated by drilling and running casing operations, providing the height and space required for drilling and storing pipe operations.
The derrick mainly consists of a main body, crown block platform, crown block frame, second-floor platform, standpipe platform, and work ladder. According to structural characteristics, derricks can be divided into four basic types: tower derricks, A-type derricks, mast derricks, and K-type derricks (front-opening derricks).
Tower derricks have the advantages of good overall stability and large carrying capacity, but their installation and dismantling are time-consuming and involve high-altitude operations. A-type derricks have good carrying capacity and overall stability, and the derrick is open in front and behind, with good visibility for the driller, so it is called an "all-around view derrick". Mast derricks are mainly used as derricks for truck-mounted drilling rigs and workover rigs, and ropes are used to maintain stability during operation. K-type derricks are currently commonly used land drilling derricks, with the advantages of good overall rigidity, convenient and safe disassembly and assembly.
The safe carrying capacity of the derrick is usually expressed by the hook load of the matched drilling rig or workover rig. At the same time, the height of the derrick, the capacity of the second-floor platform, and other parameters need to be determined according to the specific operational requirements.
In general, different types of derricks have their own characteristics and applicable scenarios, and play a crucial role in oil drilling operations.
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