| Customization: | Available |
|---|---|
| Manufacturing Process: | CNC Milling |
| Surface Treatment: | Polishing |
Suppliers with verified business licenses
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API 8 inch Spiral Drill Collars with 6 5/8 API Reg Connections with 4145H
The drill collar is located below the drill pipe and above the drill bit; drill collars can generally be divided into round drill collars, spiral drill collars and non-magnetic drill collars for downhole magnetic instruments.
2. Functions
(1). Apply WOB to the drill bit;
(2). Ensure the necessary strength under compression conditions;
(3). Reduce the vibration, swing, and jump of the drill bit, so that the drill bit works smoothly;
(4). Control well deviation
|
Connection Style and Size
|
OD
|
ID
|
Length mm
|
DF mm
|
Bending ratio
|
||
|
mm
|
in
|
mm
|
in
|
||||
|
NC23
|
79.4
|
3 1/8
|
31.8
|
1 1/4
|
9150
|
76.2
|
2.57:1
|
|
NC26
|
88.9
|
3 1/2
|
38.1
|
1 1/2
|
9150
|
82.9
|
2.42:1
|
|
NC31
|
104.8
|
4 1/8
|
50.8
|
2
|
9150 or 9450
|
100.4
|
2.43:1
|
|
NC35
|
120.7
|
4 3/4
|
50.8
|
2
|
9150 or 9450
|
114.7
|
2.58:1
|
|
NC38
|
127
|
5
|
57.2
|
2 1/4
|
9150 or 9450
|
121
|
2.38:1
|
|
NC44
|
152.4
|
6
|
57.2
|
2 1/4
|
9150 or 9450
|
144.5
|
2.49:1
|
|
NC44
|
152.4
|
6
|
71.4
|
2 13/16
|
9150 or 9450
|
144.5
|
2.84:1
|
|
NC44
|
158.8
|
6 1/4
|
57.2
|
2 1/4
|
9150 or 9450
|
149.2
|
2.91:1
|
|
NC46
|
158.8
|
6 1/4
|
71.4
|
2 13/16
|
9150 or 9450
|
150
|
2.63:1
|
|
NC46
|
165.1
|
6 1/2
|
57.2
|
2 1/4
|
9150 or 9450
|
154.8
|
2.76:1
|
|
NC46
|
165.1
|
6 1/2
|
71.4
|
2 13/16
|
9150 or 9450
|
154.8
|
3.05:1
|
|
NC46
|
171.4
|
6 3/4
|
57.2
|
2 1/4
|
9150 or 9450
|
159.5
|
3.18:1
|
|
NC50
|
171.4
|
6 3/4
|
71.4
|
2 13/16
|
9150 or 9450
|
159.5
|
2.37:1
|
|
NC50
|
177.8
|
7
|
57.2
|
2 1/4
|
9150 or 9450
|
164.7
|
2.54:1
|
|
NC50
|
177.8
|
7
|
71.4
|
2 13/16
|
9150 or 9450
|
164.7
|
2.73:1
|
|
NC50
|
184.2
|
7 1/4
|
71.4
|
2 13/16
|
9150 or 9450
|
169.5
|
3.12:1
|
|
NC56
|
196.8
|
7 3/4
|
71.4
|
2 13/16
|
9150 or 9450
|
185.3
|
2.70:1
|
|
NC56
|
203.2
|
8
|
71.4
|
2 13/16
|
9150 or 9450
|
190.1
|
3.02:1
|
|
6 5/8REG
|
209.6
|
8 1/4
|
71.4
|
2 13/16
|
9150 or 9450
|
195.7
|
2.93:1
|
|
NC61
|
228.6
|
9
|
71.4
|
2 13/16
|
9150 or 9450
|
212.7
|
3.17:1
|
|
7 5/8REG
|
241.3
|
9 1/2
|
76.2
|
3
|
9150 or 9450
|
223.8
|
2.81:1
|
|
NC70
|
247.6
|
9 3/4
|
76.2
|
3
|
9150 or 9450
|
232.6
|
2.57:1
|
|
NC70
|
254
|
10
|
76.2
|
3
|
9150 or 9450
|
237.3
|
2.81:1
|
|
8 5/8REG
|
279.4
|
11
|
76.2
|
3
|
9150 or 9450
|
266.7
|
2.84:1
|
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