THE FIRST DEMAND for a power tong that can deliver a torque value of 300,000 ft/lbs at 21-in. diameter came from the Unocal West Seno tension-leg platform (TLP) deepwater development project in Indonesia two years ago. The scope of this project was to install 24 "hybrid" production riser strings which included production riser connections that required more than 100,000 ft/lbs make-up torque and more than 200,000 ft/lbs break-out torque. These new types of threaded production riser connections were designed especially for spars, TLPs, and semisubmersible production platforms that require torque values never before seen. Threaded production risers are used to extend the subsea wellhead from the seabed to the floating platform and are exposed to tremendous forces and stresses caused by water currents and the motion of the vessel due to the waves.
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机译：对动力钳的第一个需求，它可以在21英寸时提供300,000 ft / lbs的扭矩值。直径来自两年前在印度尼西亚的Unocal West Seno张力腿平台（TLP）深水开发项目。该项目的范围是安装24条“混合”生产立管管柱，其中包括生产立管连接，需要超过100,000 ft / lbs的补充扭矩和200,000 ft / lbs的突破扭矩。这些新型的螺纹生产立管连接件专门为需要扭矩值从未有过的稀疏，TLP和半潜式生产平台而设计。带螺纹的生产立管用于将海底井口从海底延伸到浮动平台，并承受着巨大的力和应力，这些力和应力是由水流和波浪引起的船舶运动引起的。
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