Non Magnetic Spiral Drill Collar Alloy Steel Drill Rig Tools For
Oil Drilling
1,Introduction
Magnetic drill collars are made of low carbon high chromium
manganese alloy steel, which is refined by strict chemical
composition ratio and forged to achieve its mechanical properties.
It has good low permeability, high strength mechanical properties,
excellent intergranular corrosion cracking resistance and excellent
wear resistance. When the magnetic field intensity is 1x105/4πA/m,
the relative permeability urs1.010 of the non-magnetic drill collar
is less than 0.05uT when the magnetic field intensity is 1x105/4πa
/m.
2,Effect
Because all magnetic measuring instruments, when measuring the
direction of the borehole, are induced by the borehole geomagnetic
field, the measuring instruments must be in a magnetically free
environment. However, in the process of drilling, the drilling tool
often has magnetic properties, which will affect the magnetic
measuring instrument, and the correct borehole trajectory
measurement information data can not be obtained. The use of
non-magnetic drill collars can implement the non-magnetic
environment, and has the characteristics of drill collars in
drilling.
3,Working Principle
Schematic diagram of the action principle of non-magnetic drill
collars
① Geomagnetic field line :
② magnetic measuring instrument :
③ Steel drill collars :
④ interfered magnetic field line :
⑤ bit joint; The interference magnetic field lines above and below
the magnetic collars have no effect on the position of the
measuring instrument.
Therefore, the magnetic collars create a magnetic environment for
the magnetic measuring instrument and ensure that the data measured
by the magnetic measuring instrument is true geomagnetic field
information.
Technical parameters (or customized)
SPC.(MM) | OD.(MM) | Magnetic permeability | Tensile Strength (Mpa) | Yield Strength (Mpa) |
Φ70 | 70 | ≤1.005 | ≥1035 | ≥965 |
Φ76 | 76 | ≤1.005 | ≥1035 | ≥965 |
Φ89 | 89 | ≤1.005 | ≥1035 | ≥965 |
Φ91 | 91 | ≤1.005 | ≥1035 | ≥965 |
DINGSCO
Hunan Dinghan New Material Technology Co., Ltd. (DINGSCO) specialized in Nickel Based Corrosion Resistant and High
Temperature alloys products which used in the world’s most technically demanding industries and applications.We are
dedicated to providing our customers with best quality products,
fastest possible deliveries, most competitive prices of Nickel
Based Corrosion Resistant and High Temperature alloys in bars, rods, forged flanges, valve parts (Ball, Stem, Seat Ring, etc), forged shapes (shafts, discs, blocks, hubs, rings, cylinders and other custom shapes) according to ASTM, ASME, API, AMS, NACE and other industry standards.
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- Monel, Incoloy, Inconel, Hastelloy
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CORE VALUE
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