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Cross-Over joint

Specification of Drill String Cross-Over joint

 Denotation

Top junction block

Lower junction block

Type

Kelly joint

Kelly

Drill pipe joint

A or B

Kelly joint

Drill pipe joint

Drill pipe joint

A or B

Drill pipe joint

Kelly

Drill collar

A or B

Crossover joint

Drill collar

Drill collar

A or B

Bit joint

Drill collar

Bit

A or B

Swivel joint

Swivel lower joint

Kelly

Type C

Fish joint

Kelly

Drill pipe joint

Type C

Drill pipe joint

Fishing tool

Type C