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DTH Sub Adapter Down The Hole Hammer Rod Adaptor

TypeBox to Box, Pin to Pin, Box to Pin

Thread: API REG,IF

>> Application

A Sub Adapter, a special short length of pipe with a drill pipe connection on the top and a drill collar connection on the bottom, is added before a drill pipe can be screwed onto the drill collars.



Cross over subs act as an intermediary between two dissimilar threads and are used to connect the two. There are some other uses for cross over subs as well. A crossover sub can be used to protect other tooling in your drill string. Since the cross over sub is the least expensive item in the drill string it can be designed to wear before any other drilling component does. In this application a Cross over sub is often called a SAVER SUB. The Saver Sub is used to connect the entry side swivel to the first piece of pipe and is attached to every pipe, going in and coming out. This position in the string is subject to much wear, so saver sub was designed to be an inexpensive, easily replaceable part. As such, it is used to protect the threads on the actual pipe and allows for a quick and onsite replacement. Using saver sub offers great advantages, as it is cheaper to change a saver sub often, than to buy new pipe once.

A cross over sub can also be used just above the bit or in a reverse circulation application to deliver outgoing air to the bit face. In these applications a cross over sub is usually called a BIT SUB.

All of our cross over subs can have wrench flats milled into them to allow for better assembly and disassembly.


1. We adopts famous domestic large steel enterprises production of material to produce drill pipe, and heat treatment of materials by using an integrated multi-processing furnace, professional CNC machining was applied in all of the connection thread processing, all the threads are configured thread gauge, which are in accordance with international standard, Internal thickening technology has carrued on the tempering process after friction welding, so the processing quality of drill pipe is stable, reliable, use cycle greatly extended. We can process different length, diameter and wall thickness and material of API standard thread rod, we also can design and manufacture drill pipe according to customers' requirement of the material, length, wall thicknessa and connection thread.

2. Our Sub are of the highest quality ,are manufactured to exacting specifications using advancing maching technoogy.

3. They are manufactured from seamless steel tube by cold drawn.The material which meets the global standard.

4. Sub are made from quality heat treated materials which ensure superior strength, wear resistance and toughness in the most demanding applications

5. Sub are manufactured under stringent industry standards, and are field tested under a variety of conditions.

>> Specification

Female AMale BDiameter ADiameter BLength
2 3/8API Reg2 3/8API Reg7777140
2 3/8API Reg2 3/8API Reg9090140
2 3/8API Reg2 3/8API Reg102102130
2 3/8API Reg2 3/8API Reg9090144
2 3/8API Reg2 3/8API IF9595130
2 3/8API Reg2 7/8API Reg90102120
2 3/8API IF3 1/2API Reg9090164
2 7/8API Reg2 3/8API Reg9090154
2 7/8API Reg2 3/8API Reg90115120
3 1/2API Reg3 1/2API Reg115115219
3 1/2API Reg2 3/8API IF115115160
3 1/2API Reg2 7/8API Reg115115160
3 1/2API Reg2 7/8API IF115115160
3 1/2API Reg3 1/2API Reg115115160
3 1/2API Reg4 1/2API Reg146146132
4 1/2API Reg3 1/2API Reg146115235
F48×102"API Reg5959203
All can be designed according to your requests!

>> Stock

DTH Sub Adapter Down The Hole Hammer Rod Adaptor

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