Beijing Jincheng Mining Technology Co., Ltd.
Beijing Jincheng Mining Technology Co., Ltd. Survival by quality, Development by credit!
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Drill Stem AISI4151H Core Drilling Tools Cross Over Subs For Drill Collar
Description:
1. It is divided into drill string crossover and tubing Crossover.
2. Drill string Cross-over is divided into type A, type B and type C.
Crossover subs are made from AISI41455H chrome molybdenum alloy steel, and the content of micro-element can be controlled availably. The surface of sub threads are phosphated or copperized. According to shapes and applications, crossover subs are divided into three types:
TypeA stands for the same diameter: one crossover sub has one size.
TypeB stands for reduce type: one crossover sub has two sizes.
TypeC for left hand thread type: the connection thread is left hand type.
| Item | Name | Size | Connections | Upper connections part | Down connections part | Type |
| 1 | Kelly joint | 3 3/8"-7" | NC26-NC56 5 1/2FH | kelly | pipe joint | A,B |
| 2 | Pipe joint | 3 3/8"-7" | NC26-NC56 5 1/2FH | pipe joint | pipe joint | A,B |
| 3 | Transition joint | 3 1/8"-11" | NC23-NC77 6 5/8REG-7 5/8 REG | pipe joint | drill collar | A,B |
| 4 | Drill Collar joint | 31/8"-11" | NC23-NC77 6 5/8REG-7 5/8 REG | drill collar | drill collar | A,B |
| 5 | Bit joint | 3 1/8"-9 1/2" | 2 3/8REG-8 5/8 REG | drill collar | bit | A,B |
| 6 | Swivel joint | 5 7/8"-7 5/8" | 4 1/2REG-8 5/8 REG | swivel joint | kelly | C |
| 7 | Fish joint | Full sizes | All kinds | Kelly pipe joint | pipe joint | C |
| 8 | Other joints | customersized | ||||
Service
| 1. No MOQ limit, one piece sample also available. |
| 2. OEM and ODM available. |
| 3. We can take care of all shipping issues. |
| 4. After-sale service. |
FAQ
1. Shipping time for an order
We have many stock. As usual, we can delivery the goods as soon as we get the full payment.
2. Quality Control
Strict inspection and testing for every order before shipping out .
3. How can we trust your company?
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For more questions,please contact me directly by sales3@rockdrillingrig.com or Whtasapp:+86 13521157051.