Jiyuan City Kunyuan Forging Co., Ltd
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Industrial Drilling String Stabilizer Lifting Subs For Oil Drilling Equipment
Description:
Having better mechanical properties, grain size and metallurgical structure higher than API Spec 7-1 standard, according to a special heat treatment process the product’s hardness, strength, impact performance can be ensured. Wear layers mosaic cylindrical carbide has high-strength and durable resistance point.
Applications:
Lifting sub is a special tool for lifting of the drill tools in petroleum, natural gas industry and geologic exploration. It is a short drill pipe, used to trip up in drill collars when the collars of threads to hang card can be started drilling down. All threads are phosphated, copperized or cold worked.
Specifications:
1. Material: 4145H, 4145Mod, 40CrMnMo, etc.
2. UT: ASTM A388
3. Standard size for lifting subs
|
No |
Basic size D±0.08 (1/32) mm(in) |
I.D. d/mm |
Pin connection |
Lifting end |
|||||
|
Thread Type |
O.D. D±0.08(1/32) mm(in) |
Bevel Diameter DF/mm |
Tongs Space Length LPB/mm |
O.D. DB±0.08 mm |
Elevator bevel root radius RSE±0.04mm |
Tongs Space Length LB/mm |
|||
|
1 |
73.0 (2 7/8) |
31.8 |
NC23 |
79.4 (3 1/8) |
76.2 |
250.0 |
111.1 |
4.8 |
100.0 |
|
2 |
44.5 |
NC26 (2 3/8) ※ |
88.9 (3 1/2) |
82.9 |
|||||
|
3 |
88.9 (3 1/2) |
54.0 |
NC31 (2 7/8) ※ |
104.8 (4 1/8) |
100.4 |
127.0 |
|||
|
4 |
50.8 |
NC35 |
120.7 (4 3/4) |
114.7 |
|||||
|
5 |
68.3 |
NC3 (3 1/2IF) ※ |
127.0 (5) |
121.0 |
|||||
|
6 |
127.0(5) |
71.4 |
NC44 |
152.4 (6) |
144.5 |
168.3 |
6.4 |
||
|
7 |
158.8 (6 1/4) |
149.2 |
|||||||
|
8 |
82.6 95.3 |
NC46 (4IF) |
158.8 (6 1/4) |
150.0 |
|||||
|
9 |
165.1 (6 1/2) |
154.8 |
|||||||
|
10 |
171.5 (6 3/4) |
159.5 |
|||||||
|
11 |
NC50 (4 1/2IF) ※ |
177.8 (7) |
164.7 |
||||||
|
12 |
184.2 (7 1/4) |
169.5 |
|||||||
|
13 |
NC56 |
196.8 (7 3/4) |
185.3 |
300.0 |
|||||
|
14 |
203.2 (8) |
190.1 |
|||||||
|
15 |
6 5/8REG※ |
209.6 (8 1/4) |
195.7 |
||||||
|
16 |
NC61 |
228.6 (9) |
212.7 |
||||||
|
17 |
7 5/8 REG※ |
241.3 (9 1/2) |
223.8 |
||||||
|
18 |
NC70 |
247.7 (9 3/4) |
232.6 |
||||||
|
19 |
254.0 (10) |
237.3 |
|||||||
|
20 |
NC77 |
279.4 (11)
|
260.7 |
||||||
Smelting process:
Ingot--Heat--Forging--Heat treatment(Normalizing+tempering)--Inspection--Rough machining--UT--2nd heat treatment--Finished machining--Inspection
Competitive Advantage:
Quality Control and management to the whole produce process,i ncluding ingot smelting, forging
heat treatment, maching and strictly final inspcetion prior to delivery.
Excellent product quality and service competitive price, "in time" delivery.