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NON-MAGNETIC DRILL COLLAR
TECHNICAL SUMMARY
Constructed from low or non-magnetic alloys, such as stainless steel or non-magnetic steel composites, NMDCs offer a crucial solution to eliminate magnetic fields’ disruptive effects during drilling activities.
Orchid Energy Non Magnetic Drill Collar (NMDC) are made from low-carbon stainless steel as API specification and implementation of SY/T5144 standard, which can be cold thread rolling, machine special double shoulder thread and do as other specifications request. Non Magnetic Drill Collar are as a housing for MWD tools and also could provide weight for drill string.
NON-MAGNETIC DRILL COLLAR
SPIRAL NON-MAGNETIC DRILL COLLAR
SPECIFICATION1: NON-MAGNETIC DRILL COLLAR
Drill Collar Number |
O.D. |
I.D. |
Length (mm) |
DF Bevel Diameter |
Ref bend Strength Ratio |
||
(mm) |
(in) |
(mm) |
(in) |
||||
NC23-31 |
79.4 |
3 1/8 |
31.8 |
1 1/2 |
9150 |
76.2 |
2.57:1 |
NC26-35(2 3/8IF) |
88.9 |
3 1/2 |
38.1 |
1 1/2 |
9150 |
84.5 |
2.42:1 |
NC31-41(2 7/8IF) |
104.8 |
4 1/8 |
50.8 |
2 |
9150 |
101.6 |
2.43:1 |
NC35-47 |
120.6 |
4 3/4 |
50.8 |
2 |
9150 |
114.7 |
2.58:1 |
NC38-50(3 1/2IF) |
127.0 |
5 |
57.2 |
2 1/4 |
9150 |
121.0 |
2.38:1 |
NC44-60 |
152.4 |
6 |
57.2 |
2 1/4 |
9150&9450 |
144.5 |
2.49:1 |
NC44-60 |
152.4 |
6 |
71.4 |
2 13/16 |
9150&9450 |
144.5 |
2.84:1 |
NC44-62 |
158.8 |
6 1/4 |
57.2 |
2 1/4 |
9150&9450 |
149.2 |
2.91:1 |
NC46-62(4IF) |
158.8 |
6 1/4 |
71.4 |
2 13/16 |
9150&9450 |
150.0 |
2.63:1 |
NC46-65(4IF) |
165.1 |
6 1/2 |
57.2 |
2 1/4 |
9150&9450 |
154.8 |
2.76:1 |
NC46-65(4IF) |
165.1 |
6 1/2 |
71.4 |
2 13/16 |
9150&9450 |
154.8 |
3.05:1 |
NC-46-47(4IF) |
171.4 |
6 3/4 |
57.2 |
2 1/4 |
9150&9450 |
159.5 |
3.18:1 |
NC50-67(4 1/2IF) |
171.4 |
6 3/4 |
71.4 |
2 13/16 |
9150&9450 |
159.5 |
2.37:1 |
NC50-70(4 1/2IF) |
177.8 |
7 |
57.2 |
2 1/4 |
9150&9450 |
164.7 |
2.54:1 |
NC50-70(4 1/2IF) |
177.8 |
7 |
71.4 |
2 13/16 |
9150&9450 |
164.7 |
2.73:1 |
NC50-72(4 1/2IF) |
184.2 |
7 1/4 |
71.4 |
2 13/16 |
9150&9450 |
169.5 |
3.12:1 |
NC56-77 |
196.8 |
7 3/4 |
71.4 |
2 13/16 |
9150&9450 |
185.3 |
2.70:1 |
NC56-80 |
203.2 |
8 |
71.4 |
2 13/16 |
9150&9450 |
190.1 |
3.02:1 |
6 5/8 REG |
209.6 |
8 1/4 |
71.4 |
2 13/16 |
9150&9450 |
195.7 |
2.93:1 |
NC61-90 |
228.6 |
9 |
71.4 |
2 13/16 |
9150&9450 |
212.7 |
3.17:1 |
7 5/8 REG |
241.3 |
9 1/2 |
76.2 |
3 |
9150&9450 |
223.8 |
2.81:1 |
NC70-97 |
247.6 |
9 3/4 |
76.2 |
3 |
9150&9450 |
232.6 |
2.57:1 |
NC70-100 |
251 |
10 |
76.2 |
3 |
9150&9450 |
237.3 |
2.81:1 |
8 5/8 REG |
279.4 |
11 |
76.2 |
3 |
9150&9450 |
266.7 |
2.84:1 |
NON-MAGNETIC FLEX DRILL COLLAR
SPECIFICATION2: TOLERANCE OF NON-MAGNETIC DRILL COLLAR
OD Range |
OD |
ID |
Length |
Shoulder chamfer diameter-DF |
|
(mm) |
(Inch) |
||||
≤88.9 |
≤3 1/2 |
+1.2 0 |
+1.6 0 |
+152.4 |
±0.4 |
>88.9 - 114.3 |
>3 1/2 - 4 1/2 |
+1.6 0 |
|||
>114.3 - 139.7 |
>4 1/2 - 5 1/2 |
+2.0 0 |
|||
>139.7 - 165.1 |
>5 1/2 - 6 1/2 |
+3.2 0 |
|||
>165.1 - 215.9 |
>6 1/2 - 8 1/2 |
+4.0 0 |
|||
>215.9 - 241.3 |
>8 1/2 - 9 1/2 |
+4.8 0 |
|||
>241.3 |
>9 1/2 |
+6.4 0 |
SPECIFICATION3: MECHANICAL PROPERTY OF NON-MAGNETIC DRILL COLLAR
Steel |
OD Range |
Yield Strength Rt |
Tensile Strength Rm |
Elongation |
Impact Value |
Hardness Brinell |
||
Grade |
in |
Mpa |
ksi |
Mpa |
ksi |
A(%) |
Akv/L |
(HB) |
NM530 |
3 1/8 - 6 7/8 |
≥827 |
≥120 |
≥827 |
≥120 |
≥25 |
≥150 |
285 360 |
7 - 9 1/2 |
≥758 |
≥110 |
||||||
NM550 |
3 1/8 - 6 7/8 |
≥965 |
≥140 |
≥1034 |
≥150 |
≥25 |
≥150 |
285-360 |
7- 9 1/2 |
≥827 |
≥120 |
||||||
NM650 |
3 1/8 - 6 7/8 |
≥965 |
≥140 |
≥1034 |
≥150 |
≥20 |
≥90 |
330-400 |
7- 9 1/2 |
≥896 |
≥130 |
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