Optimized drill pipe connection increases efficiencies in extended-reach applications
Premium drill pipe connections, first introduced in the mid-2000s, allowed drilling in deviated and extended-reach offshore applications where earlier generations of API rotary-shouldered connections would have failed. Such premium connections’ acceptance found its limits due to their higher maintenance cost. Recognizing an opportunity to address a market demanding a connection with premium performance but reasonable costs, we developed Delta™.
Delta is Grant Prideco’s premium drill pipe connection, designed to be used in batch drilling applications and extended-reach wells typical of onshore operations. After receiving extensive feedback, the connection was developed to perfectly align cost with performance. Through more than 2.25 million feet of Delta in use around the world, this philosophy has been validated with a 3 to 4% recut rate—far below the industry average.
In two projects in the Middle East and one in the U.S., operators realized significant benefits from using Delta connections and changing their string design. These benefits included substantial efficiency gains with faster makeup/breakout, reduced drilling times, and the ability to use higher flowrates and levels of hydraulic horsepower.
Published Date: 2019-04-17
Source: National Oilwell Varco