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Contact Information
NO 32 xiaojingyu street,taiyuan,shanxi,China
Tel: 86-035-6110680
Fax: 86-035-6110680
drill collar
Model: 4145H
Category: Automatic/Industrial Machines & Equipments / Pipe & Tube Making Machines / Steel Pipe & Tube Making Machines
Characteristics
The drill collar is according to SY/T5144-1997 and API 7-1 " Specification for Rotary Drill Stem Elements" standard, the material uses AISI 4145H alloy
structural steel to carry on the deep hole processing, before thread and spiral groove processing against the total cross-section to quenching and the tempering heat treatment. After thread examination qualified, and carries on cold rolling processing to the thread root and the slips, reduces the thread part fatigue failure to increase the drill collar service life.
Specifications
Drill Collars |
||||||
OD |
ID |
Connections |
31FT Collars |
|||
inch |
mm |
inch |
mm |
|
|
|
4-1/8 |
104.78 |
2 |
50.80 |
NC31,NC35 |
519 |
|
4-3/4 |
120.65 |
2 |
50.80 |
NC35, |
698 |
|
6-1/4 |
158.75 |
2-1/4 |
57.15 |
NC46(4 IF) |
1269 |
|
6-1/2 |
165.1 |
2-1/4 |
57.15 |
NC46(4 IF) |
1381 |
|
7 |
177.8 |
2-1/4 |
57.15 |
NC50(4 1/2IF) |
1632 |
|
8 |
203.2 |
2-13/16 |
71.44 |
6 5/8REG |
2092 |
|
9 |
228.6 |
2-13/16 |
71.44 |
7 5/8REG |
2720 |
|
9-1/2 |
241.3 |
3 |
76.20 |
7 5/8REG |
3069 |
|
10 |
254 |
3 |
76.20 |
NC70 |
3390 |
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