Boart Longyear

Boart Longyearís genuine Q^TM rods are the global standard for wireline coring.  With over 40 years invested into our proprietary Q^TM wireline drill rod, Boart Longyear has met market demand through innovative engineering and state-of-the-art manufacturing techniques.

Tubing - High quality heat-treated alloy steel tubing offers consistent concentricity, straightness, and is available in all DCDMA sizes.

Thread - Proprietary tapered threads provide additional strength and ensure the easy make and break of rod joints. Load efficiency of 30% provides sufficient strength for average applications.

Thru-wall heat treatment - Our thru-wall heat treatment process provides 140% material strength and significantly increases thread wear life.

Case hardening - Boart Longyear is the only manufacturer in the industry to case-harden threads, which dramatically reduces galling and joint seizing.

Our patented RQ^TM rods feature a combination of proprietary heat treatment processes and innovative engineering to provide the ultimate in performance and longevity. RQ^TM drill rods expand drilling capabilities and lower total drill rod cost per meter in deep, deviated, and demanding wireline coring applications.

Tubing - High quality heat-treated alloy steel tubing offers consistent concentricity, straightness, and is available in all DCDMA sizes.

Thread - RQ^TM Rods are produced with either Course RQ threads or Fine RQ  TK threads.  The Course RQ threads provide easier make and break as well as anti jamming, while the Fine RQ^TM TK threads provide high performance for thin kerf wireline systems. Load efficiency of 50% provides superior strength for demanding applications.

Thru-wall heat treatment - Our thru-wall heat treatment process provides 175% material strength and significantly increases thread wear life.

Case hardening - Boart Longyear is the only manufacturer in the industry to case-harden threads, which dramatically reduces galling and joint seizing.  

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HD threads are designed for reliability in large-size core drilling, offering a robust, coarse thread profile for heavy duty wireline applications.

Tubing - High quality heat-treated alloy steel tubing offers consistent concentricity, straightness, and is available in all DCDMA sizes.

Thread - Larger, deeper threads provide maximum durability.  Load efficiency of 40% provides sufficient strength for large hole sizes.

Case hardening - Boart Longyear is the only manufacturer in the industry to case-harden threads, which dramatically reduces galling and joint seizing. 
 

The WJ rod is a conventional drill rod consisting of a tubular mid-body with friction welded pin and box ends. The tapered threads are similar to an API thread form, and are manufactured using DCDMA gauges. WJ rods are used for conventional core, geotechnical, environmental and rotary drilling applications.

- Midbody tubing
- High quality alloy steel tubing
- Consistent concentricity and straightness
- Midbody tubing is standard Q weight for WJ, or Q TK weight for WJLW.

Thread - API style of thread featuring a ìVî style design allows fast and easy making and breaking of rod joints, and offers superior pulling load capacity.

Construction - Reliable friction-welded construction ensures joints have the mechanical properties equal to the parent materialóavoiding failures inherent to the brittle material created by conventional welding techniques.