2b.Rig Components definitions MEH-032016 - RIG COMPONENTS 1...

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RIG COMPONENTS
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1. Crown Block - A series of sheaves affixed in the top of the derrick used to change the direction of pull from the drawworks to the traveling block.
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2. Derrick - Vertical structure that allows vertical clearance and strength to raise and lower the drill string. This structure with-stands two types of loading: compressive loading and wind loading.
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RIG COMPONENTS-- Definitions Types of Derricks: Triple- has the capacity of pulling 90’ stands of pipe Double- has the capacity of pulling 60’ stands of pipe Single- has the capacity of pulling 30’stands of pipe (one 30-ft joint)
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RIG COMPONENTS-- Definitions Standard Derricks - Four sided structures that must be assembled and disassembled when transporting. Portable Derricks - Telescoping and jackknife types. The telescoping derrick is raised and lowered in an extending and collapsing fashion and lowered in one piece, but may be disassembled to some degree after being lowered.
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Telescoping and jackknife types
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RIG COMPONENTS-- Definitions 3. Stand - A stand generally consists of two to four joints of made-up drill pipe. The stand is generally used when running or pulling the drill string in and out of the hole. 4. Monkey board - (Stabbing board) The platform on which the derrick man works when tripping pipe.
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5. Traveling Block - The block and tackle which is rigged with the crown block by multiples of drilling line strung between the crown block and the traveling block. The efficiency, E n , can be computed as
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E n = 0.98 n where E n is the overall hoisting efficiency n is the number of lines strung between the crown block and travelling block, and (in this case) 0.98 is the efficiency of each sheave
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6. Swivel - That part of the drill sting which connects the rotary hose to the drill string and allows circulation and rotation at the same time.
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RIG COMPONENTS-- Definitions 7. Kelly -
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