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The six-party drill pipe is made from AISI4145HMOD alloy steel. According to API Spec.7 -1. IT is formed by hot forged and fully heat-treated by intermediate frequency induction heat treatment or 20m horizontal optical resistance furnace to threads are phosphated, copperrized or cold worked.
Standard size of hexagonal kelly;Each can reach a total length of 27 meters.
Kelly size |
Length drive section |
Length overall |
Length drive section |
|||||||||
|
LD Standard |
LD Optional |
L standard |
L optional |
DFL Across flate |
DC Across cornere |
DCC Across cornere |
Rc Radlue |
Rcc Radlue |
Wall thickness eccentric bore |
|||
76.2 |
3 |
11280 |
12190 |
76.2 |
85.7 |
85.73 |
6.4 |
42.9 |
12.1 |
|||
88.9 |
3 1/2 |
11280 |
12190 |
88.9 |
100.8 |
100.0 |
6.4 |
50.0 |
13.3 |
|||
108.0 |
4 1/4 |
11280 |
15540 |
12190 |
16460 |
108.0 |
122.2 |
121.4 |
9.9 |
60.7 |
15.9 |
|
133.4 |
5 1/4 |
11280 |
15540 |
12190 |
16460 |
133.4 |
151.6 |
149.86 |
9.9 |
75.0 |
15.9 |
|
133.4 |
5 1/4 |
11280 |
15540 |
12190 |
16460 |
133.4 |
175.4 |
171.45 |
15.9 |
85.7 |
15.88 |
|
152.4 |
6 |
11280 |
15540 |
12190 |
16460 |
152.4 |
173.0 |
173.02 |
9.5 |
86.5 |
15.9 |
|
152.4 |
6 |
11280 |
15540 |
12190 |
16460 |
152.4 |
173.0 |
173.02 |
9.5 |
86.5 |
15.9 |
|
Upper box connection | ||||||
Thread size and style LF |
O.D. |
Bevel diameter |
||||
Standard |
optional |
DU standard |
DU optional |
LU |
DF Standard |
DF optional |
6 5/8 REG |
4 1/2 REG |
196.9 |
146.1 |
406.4 |
186.1 |
134.5 |
6 5/8 REG |
4 1/2 REG |
196.9 |
146.1 |
406.4 |
186.1 |
134.5 |
6 5/8 REG |
4 1/2 REG |
196.9 |
146.1 |
406.4 |
186.1 |
134.5 |
6 5/8 REG |
196.9 |
406.4 |
186.1 |
|||
6 5/8 REG |
196.9 |
406.4 |
186.1 |
|||
6 5/8 REG |
196.9 |
406.4 |
186.1 |
|||
6 5/8 REG |
196.9 |
406.4 |
186.1 |
|||
Lower pin connection |
I.D.
|
||||
Label |
O.D. |
LL |
DF Bevel diameter |
||
NC26 |
85.7 |
508 |
82.9 |
31.8 |
|
NC31 |
104.8 |
508 |
100.4 |
44.5 |
|
NC38 |
120.7 |
508 |
116.3 |
57.2 |
|
NC46 |
158.8 |
508 |
145.3 |
71.4 |
|
NC50 |
161.9 |
508 |
154.0 |
71.4 |
|
5 1/2 FH |
177.8 |
508 |
170.7 |
82.6 |
|
NC56 |
177.8 |
508 |
171.7 |
82.6 |
|
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