We supply slick, spiral, and non-magnetic drill collars; their sizes are from 3-1/8 to 11 inches. Besides the drill collars in the table below,
we can supply other drill collars at customers' request.
 |
 |
Standard Drill Collar
Drill Collar Number* |
Outside Diameter |
Inside Diameter |
Length |
Approximate Weight |
Bevel Diametre |
Bending Strength
Ratio
|
in. |
in. |
ft ±6in |
lb/ft |
|||
NC 23-31 |
3 1/8 |
1 1/2 |
30 |
22 |
76.2 |
2.57:1 |
NC 26-35 (2-3/8 IF) |
3 1/2 |
1 1/2 |
30 |
27 |
82.9 |
2.42:1 |
NC 31-41 (2-7/8 IF) |
4 1/8 |
2 |
30 or 31 |
34 |
100.4 |
2.43:1 |
NC 35-47 |
4 3/4 |
2 |
30 or 31 |
47 |
114.7 |
2.58:1 |
NC 38-50 (3-1/2 IF) |
5 |
2 1/4 |
30 or 31 |
54 |
121 |
2.38:1 |
NC 44-60 |
6 |
2 1/4 |
30 or 31 |
83 |
144.5 |
2.49:1 |
NC 44-60 |
6 |
2 13/16 |
30 or 31 |
76 |
144.5 |
2.84:1 |
NC 44-62 |
6 1/4 |
2 1/4 |
30 or 31 |
91 |
149.2 |
2.91:1 |
NC 46-62 (4 IF) |
6 1/4 |
2 13/16 |
30 or 31 |
84 |
150 |
2.63:1 |
NC 46-65 (4 IF) |
6 1/2 |
2 1/4 |
30 or 31 |
100 |
154.8 |
2.76:1 |
NC 46-65 (4 IF) |
6 1/2 |
2 13/16 |
30 or 31 |
93 |
154.8 |
3.05:1 |
NC 46-67 (4 IF) |
6 3/4 |
2 1/4 |
30 or 31 |
109 |
159.5 |
3.18:1 |
NC 50-70 (4-1/2 IF) |
7 |
2 1/4 |
30 or 31 |
118 |
164.7 |
2.54:1 |
NC 50-70 (4-1/2 IF) |
7 1/4 |
2 13/16 |
30 or 31 |
111 |
169.5 |
2.73:1 |
NC 50-72 (4-1/2 IF) |
7 3/4 |
2 13/16 |
30 or 31 |
120 |
185.3 |
3.12:1 |
NC 56-77 |
8 |
2 13/16 |
30 or 31 |
140 |
190.1 |
2.70:1 |
NC 56-80 |
8 1/4 |
2 13/16 |
30 or 31 |
151 |
195.7 |
3.02:1 |
6-5/8 API Reg |
9 |
2 13/16 |
30 or 31 |
162 |
212.6 |
2.93:1 |
NC 61-90 |
9 1/2 |
3 |
30 or 31 |
196 |
223.8 |
3.17:1 |
7-5/8 API Reg |
9 3/4 |
3 |
30 or 31 |
217 |
232.8 |
2.81:1 |
NC 70-97 |
10 |
3 |
30 or 31 |
230 |
237.3 |
2.57:1 |
NC 70-100 |
10 |
3 |
30 or 31 |
243 |
237.3 |
2.81:1 |
*The number connection (NC ) is an API connection with the V- .065 thread form with a V- .038R thread root radius. The first two digits are the pitch diameter of the thread and the last two digits are the outside diameter of the drill collar. |
||||||
Spiral Drill Collar
Technical specifications and parameters |
||||
Outside Diameter |
Cutting depth |
lead±25.4 |
||
mm |
in |
A(mm) |
B(mm) |
mm |
86 |
3 3/8 |
3.5±0.79 |
|
679 |
98.4 |
3 7/8 |
4.0±0.79 |
|
914 |
101.6～111.1 |
4～4 1/8 |
4.8±0.79 |
|
914 |
114.3～130.2 |
4 1/2～5 1/8 |
5.6±0.79 |
|
965 |
133.4～146.1 |
5 1/4～5 3/4 |
6.4±0.79 |
|
1067 |
149.2～161.9 |
5 7/8～6 3/8 |
7.1±1.59 |
|
1067 |
165.1～177.8 |
6 1/2～7 |
7.9±1.59 |
|
1168 |
181.0～200.0 |
7 1/8～7 7/8 |
8.7±1.59 |
5.6±0.79 |
1626 |
203.2～225.4 |
8～8 7/8 |
9.5±1.59 |
6.4±0.79 |
1727 |
228.6～250.8 |
9～9 7/8 |
10.3±2.37 |
7.1±1.59 |
1829 |
254.0～276.2 |
10～10 7/8 |
11.1±2.37 |
7.9±1.59 |
1930 |
279.4 |
11 |
11.9±2.37 |
8.7±1.59 |
2032 |
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