Non-Magnetic Drill Collars & subs

Short Description:

Non-magnetic Drill collars are made from Non-magnetic steel bars with low-strength by combining a proprietary chemical analysis and a rotary hammer forging process with low magnetic permeability excellent machine ability, it will not interfere with the specialized directional equipment and will enhance the performance of the drilling operation.

Non-mag drill collars function as housing for the MWD tools, while at the same time provide the weight for drillstring. non-mag drill collars are suitable for all types of drilling including straight and directional applications.

Each drill collar is fully inspected by internal inspection dept. All data obtained are recorded on the inspection certificate furnished with each drill collar. API monogram, serial number, OD, ID, type and size of connections are stamped on recessed mill flats.

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Product Detail

Product Tags

Non-Magnetic Drill Collar

Slick Non-Mag Drill Collar
Slick Non-Mag Drill Collar provide the required weight on bit, and will not interfere with the directional drilling ability.

Spiral Non-Mag Drill Collar
Spiral Non-Mag Drill Collar is designed to allow greater flow area for drilling fluids, while providing the benefits of non-mag steel for complex drilling programs.

Flex Non-Mag Drill Collar
Flex Non-Mag Drill Collar is thinner and more flexible than standard drill collar. Their ability to make short radius turns, bend for high build angles, and pass through severe doglegs makes them ideal for use in directional and horizontal applications. Manufactured with non-mag steel, this drill collar is well suited for housing MWD equipment.

Product Specification

Connections	OD mm	ID mm	Length mm
NC23-31	79.4	31.8	9150
NC26-35	88.9	38.1	9150
NC31-41	104.8	50.8	9150 or 9450
NC35-47	120.7	50.8	915 or 9450
NC38-50	127.0	57.2	9150 or 9450
NC44-60	152.4	57.2	9150 or 9450
NC44-60	152.4	71.4	9150 or 9450
NC44-62	158.8	57.2	9150 or 9450
NC46-62	158.8	71.4	9150 or 9450
NC46-65	165.1	57.2	9150 or 9450
NC46-65	165.1	71.4	9150 or 9450
NC46-67	171.4	57.2	9150 or 9450
NC50-67	171.4	71.4	9150 or 9450
NC50-70	177.8	57.2	9150 or 9450
NC50-70	177.8	71.4	9150 or 9450
NC50-72	184.2	71.4	9150 or 9450
NC56-77	196.8	71.4	9150 or 9450
NC56-80	203.2	71.4	9150 or 9450
6 5/8REG	209.6	71.4	9150 or 9450
NC61-90	228.6	71.4	9150 or 9450
7 5/8REG	241.3	76.2	9150 or 9450
NC70-97	247.6	76.2	9150 or 9450
NC70-100	254.0	76.2	9150 or 9450
8 5/8REG	279.4	76.2	9150 or 9450

Non Magnetic Stabilizer

Integral non magnetic stabilizer is made from one solid forging of non magnetic steel. The material is high purity Chromium Manganese Austenitic stainless steel.

Ultrasonic inspection and MPI inspections are performed on each forging over its full length and section, after rough machining according to API Spec 71. Mill test certificates including mechanical properties, chemical analysis, magnetic properties and inspections are supplied with all stabilizers.

We have the capacity to produce Non Magnetic Stabilizer up to Crown OD 26''

Product Specification

Tensile Strength	Yield Strength	Hardness	Magnetic Permeability
min.	min.	min.	MAX	Average
120KSI	100KSI	285HB	1.01	1005

Non Magnetic MWD Sub

Non Magnetic MWD Sub is made from Chromium Manganese Austenitic stainless steel, compressive stress resistance pipe is made from non materials for installing MWD impulser inside and amongst others. Non Magnetic MWD Sub have been widely used by domestic and international directional drilling companies.
All connections are machined according to API Spec.7-2 and thread roots are cold worked and coated with API thread compound and equipped with protectors.

Product Specification

Diameter (mm)	Internal Diameter (mm)	Internal bore length (mm)	Lower-end aperture (mm)	Total leagth (mm)
121	88.2	1590	65	2500
172	111.5	1316	83	2073
175	127.4	1280	76	1690
203	127	1406	83	2048

LANDRILL Non Magnetic Materials standard

Non Magnetic Properties:
Relative Permeability: Max 1.005
Hot Spot / Field Gradient: MAX ±0.05μT
Special Treatment on ID: Roller Burnishing

After roller burnishing, a compressive layer come into being, the advantages as follows:
Increase the corrosion resistance properties, Increase the surface hardness of bore up to HB400, Increase surface finish of bore to Ra≤3.2 μm, Test and Inspection carried out on each bar during production of NMDC, Stabilizer and MWD parts.
Chemical Composition, Tensile Test, Impact Test, Hardness Test, Metallographic Test (Grain Size), Corrosion Test (According to ASTM A 262 Practice E), Ultrasonic Test over the whole length of the bar (According to ASTM A 388), Relative maganetic permeability Test, Hot spot Test, Dimensional Inspection, etc.

Special surface treatments options: Hammer peening, roller burnishing, shot peening.

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