Drilling Crossover Sub

Types: Drill string cross-over sub and Tubing cross-over sub
Size: 2-3/8″ to 20″

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api crossover sub drilling crossover sub saver sub drill pipe crossover sub api 7-1 crossover sub drilling bit crossover sub

Product Description

Product Features

Product Applications

Product Types

Product Parameters

The crossover sub is the basic component in downhole work. It is used to crossover from one connection size to another. Or as the disposable component used to extend the connection life of a more expensive drill stem member.

1.The length of crossover subs is generally measured from shoulder to shoulder.

2.Typical lengths range from 6″ – 28″. going up in increments of 2 inches with AISI 4145H, AISI 4145H Mod, AISI 4340, AISI 4140-4142 and Non-magnetic material.

3.All connections are phosphate-coated or copper plated to improve resistance to corrosion.

4.Crossover Subs are manufactured from 4145M or 4140HT alloy steel.

5.The connections are protected by a phosphate surface coating that minimizes galling on initial make-up.

The Crossover sub is mainly used to connect upper and lower drill tools in different connectors in drilling operations. Also it can be used to protect other tooling in drill stem (called saver sub) or be used to deliver outgoing air to the bit face just above the bit (called bit sub).

A Pin (male) * Box (female); B Pin (male) * Pin (male); C Box (female) * Box (female).

And we can design and manufacture special types of subs to satisfy clients’ ideas or drawings.

A type is straight OD sub, B type is reduced section sub, C type is left hand.

Description	Upper junction block .	Lower junction block	Type
Kelly sub	Kelly	Drill pipe sub	Type A or B
Drill pipe sub	Drill pipe	Drill pipe sub	Type A or B
Crossover sub	Drill pipe	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
Fish sub	Drill pipe	Fishing tool	Type C