Landrill Delivers API Spec 7-1 Drill Collars for Global Drilling Operations

Landrill Oil Tools, a manufacturer of downhole drilling tools, produces API Spec 7-1 compliant drill collars​ for onshore and offshore drilling programs. Available in slick, spiral, and non-magnetic configurations, these tools deliver consistent weight-on-bit (WOB), enhance directional control, and reduce drill string buckling in demanding well profiles.

Product Configurations: 

1. Slick Drill Collars (SDC):​ Smooth OD for general WOB application in vertical and mildly deviated wells.
2. Spiral Drill Collars:​ Grooved OD reduces contact area with wellbore, mitigating differential sticking in permeable formations.
3. Non-Magnetic Drill Collars (NMDC):​ Ultra-low permeability alloy housing MWD/LWD tools. ID shot-peened to prevent H₂S stress corrosion cracking.

Material & Quality Assurance:

All steel drill collars are manufactured from AISI 4145H or 4145H modified​ alloy steel, quenched and tempered to meet API Spec 7-1 mechanical requirements. The manufacturing process includes forging, heat treatment, CNC machining of API threaded connections (NC, IF, FH, REG), and cold-working with phosphate coating for thread protection.

Every collar undergoes rigorous inspection:

1. Ultrasonic Testing (UT):​ Internal flaw detection.
2. Magnetic Particle Inspection (MT):​ Surface discontinuity identification.
3. Hardness & Dimensional Verification:​ Conformance to API Spec 7-1 tolerances.
4. Full Traceability:​ Unique heat number and grade marking on each tool.

Landrill maintains [API Spec 7-1 license / ISO 9001]​ certifications.

Why Landrill Oil Tools Drill Collars

1. API Compliance: Full adherence to dimensional, material, and inspection standards.
2. Metallurgical Integrity: 4145H modified alloy with verified mechanical properties.
3. Complete Coverage: Slick, spiral, and NMDC from one supplier.
4. Customization: Special lengths, connections, and ID/OD combinations to customer drawings.
5. Global Experience: Trusted by drilling contractors across [export markets] .

About US

Landrill Oil Tools is a professional manufacturer of downhole drilling tools headquartered in Xi’an, China. The product portfolio includes drill collars, HWDP, drill pipe, and stabilizers — all manufactured to API standards. With 9 years of experience, we serve operators across the whole world.

Media Contact:[Jessie]

Email: [energy@landrilltools.com]

Website: [http://www.landrilloiltools.com]