Cross-over sub

Cross-over sub

Cross-over sub acts for conversion and connection and is the basic component in downhole work.It is divided into drill string cross-over sub and tubing Cross-over sub.Drill string Cross-over sub is divided into type A, type B and type C.

Specification


Description

Upper connection

 

Lower connection

Type

Kelly sub

Kelly

Drill pipe sub

Type A or B

Drill pipe sub

Drill pipe sub

Drill pipe sub

Type A or B

Cross over sub

Kelly

Drill collar

Type A or B

Drill collar sub

Drill collar

Drill collar

Type A or B

Bit sub

Drill collar

Bit

Type A or B

Swivel sub

Swivel lower sub

Kelly

Type C

Fish Sub

Kelly

Drill pipe sub

Type C

Drill pipe sub

Fishing tool

Type C


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