精選產品
聯絡資訊
NO 32 xiaojingyu street,taiyuan,shanxi,China
電話：86-035-6110680
傳真：86-035-6110680
drill collar
產品型號：4145H
產品分類：自動化設備/產業機械 / 鋼管製造機 / 鋼管製造機
產品特色
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.
產品規格
|
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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