Bit Sub with Float Bore API Pin Stress Relief Groove and Box Boreback
Forwell can supply a range drilling equipment and supplies including Kelly Saver, Tool Joint, Crossover, Bit, Drill Collar, and Swivel Drilling Subs.
Specification as follows:
Items No. | Code | Thread Connection | Thread Form | Pin Thread | Box Thread | ||||
Rd/In | Taper | DS | DF | Thread Length | QF | Thread Length | |||
1 | NC23 | 4 | 1：6 | 65.10 | 52.4 | 76.2 | 66.7 | 92.1 | |
2 | 2A10 | NC26（23/8＂IF） | 4 | 1：6 | 73.05 | 60.35 | 76.2 | 74.6 | 92.1 |
3 | 210 | NC31（27/8＂IF） | 4 | 1：6 | 86.13 | 71.32 | 88.9 | 87.7 | 104.8 |
4 | NC35 | 4 | 1：6 | 94.97 | 79.09 | 95.2 | 96.8 | 111.1 | |
5 | 310 | NC38（31/2＂IF） | 4 | 1：6 | 102.01 | 85.07 | 101.6 | 103.6 | 117.5 |
6 | 4A20 | NC40（4＂FH） | 4 | 1：6 | 108.71 | 89.66 | 114.3 | 110.3 | 130.2 |
7 | NC44 | 4 | 1：6 | 117.48 | 98.43 | 114.3 | 119.1 | 130.2 | |
8 | 4A10 | NC46（4＂IF） | 4 | 1：6 | 122.78 | 103.73 | 114.3 | 124.6 | 130.2 |
9 | 410 | NC50（41/2＂IF） | 4 | 1：6 | 133.35 | 114.3 | 114.3 | 134.9 | 130.2 |
10 | NC56 | 4 | 1：4 | 149.25 | 117.5 | 127 | 150.8 | 142.9 | |
11 | NC61 | 4 | 1：4 | 163.53 | 126.6 | 139.7 | 165.1 | 155.6 | |
12 | NC70 | 4 | 1：4 | 185.75 | 147.65 | 152.4 | 187.3 | 168.3 | |
13 | NC77 | 4 | 1：4 | 203.20 | 161.85 | 165.1 | 204.8 | 181 | |
14 | 2A30 | 23/8＂REG | 5 | 1:4 | 66.68 | 47.63 | 76.2 | 69.3 | 92.1 |
15 | 230 | 27/8＂RED | 5 | 1:4 | 76.20 | 53.98 | 88.9 | 77.8 | 104.8 |
16 | 330 | 31/2＂RED | 5 | 1:4 | 88.90 | 65.08 | 95.2 | 90.5 | 111.1 |
17 | 430 | 41/2＂RED | 5 | 1:4 | 117.48 | 90.48 | 107.9 | 119.1 | 123.8 |
18 | 530 | 51/2＂RED | 4 | 1:4 | 140.21 | 110.06 | 120.6 | 141.7 | 136.5 |
