joints and fractures

Aug 14th, 2016
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Drill Pipe Dimensions and StrengthsLike other oilfield tubulars, drill pipe comes in a variety of lengths, diameters, weights and grades of steel. Drill pipe isalso specified according to its upset (i.e., the type of end section provided for weld-on connections or tool joints).Factors that influence drill pipe selection include:Hole sizeWell depthCasing and cementing requirementsSubsurface pressuresCirculating system and drilling mud parametersHoisting capacity of drillng rigPipe availability and rental costContract provisionsThe American Petroleum Institute has established standards for drill pipe manufacturing practices, dimensions,strengths and performance properties. These standards appear in the following publications:API Spec 5DP/ISO 11961: Specification for Drill PipeAPI Bul 5C2: Bulletin on Performance Properties of Casing, Tubing and Drill PipeAPI RP 7G: Recommended Practice for Drill Stem Design Operating LimitsSize and WeightAPI-standard drill pipe is available in three length ranges:Range 1(18-22 ft)Range 2 (27-30 ft)Range 3 (38-45 ft).The most commonly used length is Range 2. Thus, the typical "average" length of a joint of drill pipe is about 30 feet,or just under 10 meters.Table 1 lists outside diameters and nominal weights for API standard drill pipe (note that these diameters andweights apply only to the drill pipe tube, and do not include the weights and diameters of tool

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