Drill sting is an assembly of drill pipe, drill collars, hevi-wate, and drill bits which are of varying diameters depending on the type of operation, depth, and trajectory. Drill subs are an integral part of daily drilling activity. It is a short and threaded piece of pipe used to screw together the different parts of drilling string. Different types of subs are essential as drill string components cannot be joined together due to differences in thread size or design.
Various types of subs available are crossover subs, Kelly saver subs, lifting subs, top drive sub, float subs, bull nose subs, circulating subs, and other subs. Subs are threaded piece of pipe used to adapt parts of the drilling string that cannot otherwise be screwed together because of differences in thread size or design. A sub (a substitute) may also perform a special function. Lifting subs are used with drill collars to provide a shoulder to fit the drill pipe elevators; a kelly saver sub is placed between the drill pipe and the kelly to prevent excessive thread wear of the kelly and drill pipe threads; a bent sub is used when drilling a directional hole.
The report analyzes the drill subs market by application and geography. Market share analysis, by revenue, of the top companies is also included in the report. The market share analysis of these key players is arrived at, based on key facts, annual financial information, and interviews with key opinion leaders such as CEOs, Directors, and marketing executives.
In order to present an in-depth understanding of the competitive landscape, the report on drill subs consists of company profiles of some major participants in the market, which combines technology providers such as Halliburton (U.S.), National Oilwell Varco (U.S.), Vallourec (France), Schlumberger (U.S.) and others.
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