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NO 32 xiaojingyu street,taiyuan,shanxi,China
Tel: 86-035-6110680
Fax: 86-035-6110680
spiral drill collar
Model: 4145H
Category: Automatic/Industrial Machines & Equipments / Pipe & Tube Making Machines / Steel Pipe & Tube Making Machines
Characteristics
The spiral drill collar is one of our product families. Three RH spiral grooves is made in outside surface of drill collar in order to reduce the contract area with the well face and the steering resistance, which can prevent differential pressure sticking. The weight of spiral drill collar is 4% lighter than drill collar of the same size. The shapes of both ends are the same as round drill collars. Spiral drill collars are classified into typeand type according to the difference of spiral grooves.
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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