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API Drilling Tool Lift Sub NC70
Overview: Drill-stem sub is utilized to change and connect drill stem components in oil and gas drilling. Classification: kelly stem(protection) sub, drill-stem sub, transition sub, drill collar sub, bit sub, bit sub, swivel sub, salvage sub. According to the appearance, there is type A (straight OD), type B (reducing), type C (LH type), type D (RH and LH type). Structure and features: drill-stem sub is made up of body, threads of both ends and the stress-relief groove. It is made of alloy steel forgings after heat treatment and finish machining. Its mechanical performance is in accordance with relevant requirements. It is used for the connection of a drill bit and a drill collar, two drill collars, a drill collar and a drilling stem, a drilling stem and a kelly stem, a kelly stem and a tap. It can be applied to the connection of the fishing tools and the drill stems. This product is designed and manufactured in accordance with the petroleum and natural gas industry standard of People’s Republic of China Drill-stem Subs (SY/T 5200-2002) and API7-1 standard.
1. High-strength
2. API Standard
3. Excellent Cost Performance
Major technical parameters and dimensions:
S/N |
ND ±0.8 (1/32 in.) mm (in.) |
ID ±1.6 |
Male screwed nipple |
Lift end |
|||||
Thread type |
OD ±0.8 (1/32 in.) mm (in.) |
Fillet diameter mm |
Tong occlusion length mm |
OD ±0.8 mm |
Fillet radius of shoulder root mm |
Tong occlusion length mm |
|||
1 |
88.9 (3 1/2) |
54 |
NC31 |
104.8 (4 1/8) |
100.4 |
250 |
127 |
4.8 |
100 |
2 |
50.8 |
NC35 |
120.7 (4 3/4) |
114.7 |
|||||
3 |
68.3 |
NC38 |
127 (5) |
121 |
|||||
4 |
127 (5) |
52.6 |
NC46 |
165.1 (6 1/2) |
154.8 |
250 |
168.3 |
6.4 |
|
5 |
95.3 |
NC50 |
177.8 (7) |
164.7 |
|||||
6 |
6 5/8 in. REG |
209.6 (8 1/4) |
195.7 |
300 |
|||||
7 |
NC70 |
254 (10) |
237.3 |
||||||
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