During the 1990's, tungsten carbide-based hardbanding was in widespread use and was determined to be the primary cause of casing wear. However the absence of hardbanding, while slowing casing wear to a small degree, allowed the tool joints to wear at an accelerated rate, lessening the torsional capacity of the drill pipe and putting drilling operations at a serious risk. The challenge was to discover a balanced, simultaneously effective solution between both casing wear defense and tool joint protection, which is caused by the worsening conditions associated with highly deviated ERD wells. Previous casing friendly alloys reduced casing wear, but produced unacceptable tool joint wear as a consequence. Crack-prone design flaws were also present, as widespread cracking of the alloy material often ensued. This caused catastrophic tool joint failure and in some cases, even the failure of the hardbanding itself, due to tool joint spalling.
OTW 12Ti combats wear in extreme drilling conditions, as demonstrated by its performance in highly deviated well & open hole applications. Maximum drill pipe life is achieved through superior wear-resistant properties, coupled with the ultra-smooth, casing friendly features preferred by most oil companies.
OTW 10SS is a gas shielded, metal cored alloy wire, specifically designed for use in severe sour (SS) environments and is fully compatible with all drill pipe sour service grades. Drill pipe sour service grades (VM 105 DP SS™, TSS™-105, CYX™-105) and HWDP differ greatly from normal API grades and use a modified form of steel on the pipe body and tool joints.
OTW 16XS Extreme Service is a product ideally suited for drilling in the most demanding ERD and Ultra ERD wells. The unique nature of these wells puts severe stress on the drill string, prompting the industry to respond with High performance Tool Joint Connections (XT™, VX™, TT™). These connections produce higher torque values with lower drag and wall thickness. This requires increased reinforcement through optimized hardbanding solutions, resulting in heightened structural integrity and minimal dilution, while still providing effective overall durability.
During development of the OTW range, Castolin Eutectic constructed its very own hardbanding C-Wear testing machine. The machine tests encompass:
- Casing material combined with full-size, hardbanding alloy-infused wear samples. - Specific mud parameters, measuring tool-joint, open hole and casing wear rates. - established hardbanding coating friction dynamics. Contact Antonio Fu antonio.fu@castolin.cn +86 1381 7361 629
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