API Oil downhole tool 6 5/8" Reg drilling bit sub

Description
Cross-over sub acts for conversion and connection of drill stem component in
petroleum, natural gas and geology drilling work.It is used mainly for
connecting of upper drill tools and lower drill tools during drilling
operations or be used to deliver outgoing air to the bit face just above the
bit (called bit sub).

Crossover subs are available with:
1. box x pin
2. box x box or
3. pin x pin connections.

Typical lengths of crossover subs range from 6" - 28" long going up in
increments of 2 inches.

The material include AISI 4145H, AISI 4145H Mod, AISI 4340, AISI 4140-4142
and Non-magnetic material.

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

Puyang Zhongshi Group Co., Ltd is a professional manufacturer of various oilfield equipments and cementing accessories since 1997, restructured enterprise of SINOPEC. 

We have the certificates of API 5CT, API Q1, API 11E, API 6A, API 11AX, ISO 9001 and ISO 14001, etc..  

Our  products mainly include: 

1. Casing Centralizer                          

2.  Float Collar & Float Shoe 

3. Cementing Plug                              

4.  Cementing Head
5.  Cement Basket                              

6.  Tubing Pump / Rod Pump
7.  Valve Ball & seat                            

8. Casing / Tubing Pipe and Coupling
9. Stage Collar                                   

10. Pumping Unit
11. Sucker Rod

Our group have more than 10 years export experience and 9 subsidiary factories, more than 500 employees. We are the first-class supplier of resources market of SINOPEC and CNPC.  Our foreign customers are mainly from America, Central Asia, Russia, Southeast Asia, Middle East, etc.