Non-magnetic Drill Collar
Non-magnetic Drill Collar basic infomation
Catalog:
Oil drilling
Keywords:
Non-magnetic Drill Collar
Tel:
+86-546-7663069
Fax:
+86-546-7663068
E-mail:
Non-magnetic Drill Collar details
1) All our products accord with API SPEC 7 standard, and we get the right to use the API 7 LOGO.
2) Size: from 3 1/8" ~ 11" available
3) Grade: DNM 110
4) Cargo Readiness: Normally 3 months after deposit
Materials of the Non-magnetic drill collars are from chrome manganese, low carbon obtained by combining a proprietary chemical analysis and a rotary hammer process. The material is resistant to stress corrosion cracking, with high machine ability and no tendency to galling.
Magnetic permeability (when MPS=1105/4Nm) relative max μr:1.010.
Magnetic field gradient (hot spots) max: B 0.05micro tesla/100mm.
| Mechanical Property | ||||||
| OD Range | Yield Strength (MPa) |
Tensile Strength (MPa) |
Elongation (%) |
Hardness (HB) |
Impact Test (J) |
|
| mm | in | |||||
| 79.4∼171.4 | 3 1/8∼6 3/4 | ≥758 | ≥827 | ≥18 | 285∼360 | ≥75 Vertical Direction |
| 177.8∼279.4 | 7∼11 | ≥689 | ≥758 | ≥20 | ||
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