DRILL COLLARS
DRILL COLLARS
Drill Collars are manufactured in accordance with API Spec 7. Its material is ANSI 41545H. Trace elements such as sulphur and phosphorus are reduced during the steel-making process, thus making the material into high physical properties.
STANDARD SIZES and CONNECTION TYPE OF DRILL COLLARS
|
Size OD |
Bore ID |
Connection |
Length |
Bending-Strength |
Weight |
||
|
m |
ft |
kg |
lb |
||||
|
3-1/8 |
1-1/4 |
NC23 |
9.14 |
30 |
2.57:1 |
300 |
622 |
|
3-1/2 |
1-1/2 |
NC26 2-3/8 IF |
9.14 |
30 |
2.42:1 |
367 |
809 |
|
4-1/8 |
2 |
NC31 2 7/8 IF |
9.14 |
30 |
2.43:1 |
476 |
1030 |
|
4-3/4 |
2 |
NC35 |
9.14 |
30 |
2.58:1 |
681 |
1502 |
|
5 |
2-1/4 |
NC38 3-1/2 IF |
9.14 |
30 |
2.38:1 |
722 |
1592 |
|
6 |
2-1/4 |
NC44 |
9.45 |
31 |
2.49:1 |
1169 |
2578 |
|
6 |
2-13/16 |
NC44 |
9.45 |
31 |
2.84:1 |
1056 |
2328 |
|
6-1/4 |
2-1/4 |
NC44 |
9.45 |
31 |
2.91:1 |
1281 |
2825 |
|
6-1/4 |
2-13/16 |
NC46 4 IF |
9.45 |
31 |
2.63:1 |
1160 |
2558 |
|
6-1/2 |
2-1/4 |
NC46 4 IF |
9.45 |
31 |
2.76:1 |
1383 |
3050 |
|
6-1/2 |
2-13/16 |
NC46 4 IF |
9.45 |
31 |
3.05:1 |
1277 |
2816 |
|
6-3/4 |
2-1/4 |
NC46 4 IF |
9.45 |
31 |
3.18:1 |
1520 |
3352 |
|
7 |
2-1/4 |
NC50 4-1/2 IF |
9.45 |
31 |
2.54:1 |
1647 |
3632 |
|
7 |
2-13/16 |
NC50 4-1/2 IF |
9.45 |
31 |
2.73:1 |
1548 |
3413 |
|
7-1/4 |
2-13/16 |
NC50 4-1/2 IF |
9.45 |
31 |
3.12:1 |
1675 |
3693 |
|
7-3/4 |
2-13/16 |
NC56 6-5/8 REG |
9.45 |
31 |
2.70:1 |
1957 |
4315 |
|
8 |
2-13/16 |
NC56 6-5/8 REG |
9.45 |
31 |
3.02:1 |
2112 |
4657 |
|
8-1/4 |
2-13/16 |
6-5/8 REG |
9.45 |
3l |
2.93:1 |
2252 |
4966 |
|
9 |
2-13/16 |
NC61 7-5/8 REG |
9.45 |
31 |
3.17:1 |
2746 |
6055 |
|
9-1/2 |
3 |
7-5/8 REG |
9.45 |
31 |
2.81:1 |
3041 |
6705 |
|
9-3/4 |
3 |
NC70 7-5/8 REG |
9.45 |
31 |
2.57:1 |
3224 |
7109 |
|
10 |
3 |
NC70 8-5/8 RGE |
9.45 |
31 |
2.81:1 |
3421 |
7543 |
|
11 |
3 |
NC77 8-5/8 RGE |
9.45 |
31 |
2.78:1 |
4210 |
9283 |
WHEN INQUIRING or ORDERING, PLEASE SPECIFY:
1. DRILL COLLAR O.D.
2. DRILL COLLAR BORE.
3. LENGTH OF DRILL COLLAR.
4. SIZE, TYPE AND LOCATION OF CONNECTIONS.
5. TYPE OF THREAD PROTECTORS.
6. SLIP and ELEVATOR RECESS (UP TO API RP 7G)
7. SPIRAL GROOVES.
8. OTHER SPECIAL REQUIREMENTS, E.G.STRESS-RELIEF GROOVE.
NOTE: WE CAN ALSO SUPPLY DRILL COLLARS MADE FROM OTHER STANDARD MATERIAL, E.G.AISI 4145HM or AISI 4145M.