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Brand Name : | DINGSCO |
Model Number : | According to customers' requests |
Certification : | ISO 9001:2015,API 7-1 |
Price : | Negotiable |
Payment Terms : | T/T |
Supply Ability : | Negotiable |
Delivery Time : | (Sample order) 7 days |
API Standard Non-Magnetic Drill Collar Heavy Weight Drill Pipe Oil Field HWDP
Non-Magnetic Drill Collar Overview
Non-magnetic drill collars are vital components in the drill
string, primarily used in directional drilling operations to
prevent magnetic interference with downhole measurement tools such
as Measurement While Drilling (MWD) and Logging While Drilling
(LWD).
Material:
Typically constructed from non-magnetic alloys such as beryllium
copper or specific non-magnetic stainless steels (e.g., modified
AISI 4145H, 15-5 PH stainless steel).
These materials are chosen for their excellent non-magnetic
properties and high strength.
Features:
Non-Magnetic Properties:
Designed to have extremely low magnetic permeability, ensuring they
do not interfere with the sensitive magnetic sensors in MWD and LWD
tools.
Mechanical Strength:
High tensile strength to withstand the high mechanical stresses
encountered during drilling operations.
Resistant to fatigue, corrosion, and high temperatures commonly
found in downhole environments.
Dimensions:
Available in various sizes, typically ranging in outer diameter
(OD) from 4 inches to 11 inches and lengths that can be customized
to fit specific drilling needs.
Inner diameters (ID) vary to accommodate different flow rates and
tool designs.
Thread Connections:
API standard connections (e.g., NC50, NC38) or proprietary designs
to ensure compatibility with other drill string components.
Design Variants:
Some non-magnetic drill collars come with spiral or slick designs
to minimize differential sticking and enhance the flow of drilling
fluids.
Applications:
Directional Drilling:
Placed directly above the drill bit and below the MWD and LWD tools
to provide a non-magnetic gap. This positioning is critical for
accurate directional drilling and data collection.
Measurement While Drilling (MWD):
MWD tools measure the trajectory of the wellbore using magnetic
sensors. Non-magnetic drill collars ensure these measurements are
not affected by magnetic interference from the drill string.
Logging While Drilling (LWD):
LWD tools collect formation evaluation data, including resistivity,
porosity, and gamma-ray measurements. Non-magnetic collars prevent
magnetic fields from distorting these measurements.
Manufacturing Standards:
Compliant with industry standards like API (American Petroleum
Institute) to ensure quality and reliability.
Stringent testing for mechanical properties and non-magnetic
characteristics.
Technical Parameters (or customized)
SPEC.(MM) | OD.(MM) | Magnetic Permeability | Tensile Strength (Mpa) | Yield Strength (Mpa) |
Φ63 | 63 | ≤1.005 | ≥1035 | ≥965 |
Φ73 | 73 | ≤1.005 | ≥1035 | ≥965 |
Φ76 | 76 | ≤1.005 | ≥1035 | ≥965 |
Φ89 | 89 | ≤1.005 | ≥1035 | ≥965 |
Φ91 | 91 | ≤1.005 | ≥1035 | ≥965 |
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