轉(zhuǎn)換接頭在石油、天然氣和地質(zhì)鉆井作業(yè)中起鉆柱構(gòu)件的轉(zhuǎn)換連接作用，是連接上部鉆具與下部鉆具的主要工具之一，分鉆柱轉(zhuǎn)換接頭和油管轉(zhuǎn)換接頭。A型(同徑式)、B型（異徑式）和C型（左旋式）。在鉆井過程中，下部鉆具的扣型與上部鉆具的扣型連接不上，這就需要用轉(zhuǎn)換接頭來連接。
鉆柱轉(zhuǎn)換接頭技術(shù)參數(shù)
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名稱Denotation
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上部連接件
Upper Connection Part
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下部連接件
Lower Connection Part
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型 式
Type
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方鉆桿轉(zhuǎn)換接頭
Kelly Cross-over Joint
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方 鉆 桿
Kelly
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鉆 桿 接 頭
Drill pipe joint
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Ａ or B
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鉆桿轉(zhuǎn)換接頭
Drill Pipe Joint
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鉆 桿 接 頭
Drill Pipe Joint
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鉆 桿 接 頭
Drill Pipe Joint
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Ａ or B
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過渡轉(zhuǎn)換接頭
Crossover Joint
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方 鉆 桿
Kelly
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鉆 鋌
Drill Collar
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Ａ or B
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鉆鋌轉(zhuǎn)換接頭
Drill Collar Joint
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鉆 鋌
Drill Collar
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鉆 鋌
Drill Collar
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Ａ or B
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鉆頭轉(zhuǎn)換接頭
Bit Joint
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鉆 鋌
Drill Collar
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鉆 頭
Bit
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Ａ or B
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水龍頭轉(zhuǎn)換接頭
Swivel Joint
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水龍頭下接頭
Swivel Lower Joint
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方 鉆 桿
Kelly
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C
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打撈用轉(zhuǎn)換接頭
Fish Joint
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方 鉆 桿 Kelly
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鉆 桿 接 頭Drill Pipe Joint
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C
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鉆 桿 接 頭Drill Pipe Joint
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打撈工具 Fishing Tool
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C
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