{"id":15893,"date":"2026-06-04T18:23:31","date_gmt":"2026-06-04T10:23:31","guid":{"rendered":"https:\/\/www.drillpipes.com\/%d9%85%d8%a7%d8%af%d8%a9-%d8%ae%d8%a7%d8%b5%d8%a9-%d8%a3%d9%86%d8%a8%d9%88%d8%a8-%d8%a7%d9%84%d8%ad%d9%81%d8%b1-%d9%85%d9%82%d8%a7%d8%a8%d9%84-api-5dp-%d8%a3%d9%86%d8%a8%d9%88%d8%a8-%d8%a7%d9%84%d8%ad\/"},"modified":"2026-09-18T16:10:33","modified_gmt":"2026-09-18T08:10:33","slug":"%d9%85%d8%a7%d8%af%d8%a9-%d8%ae%d8%a7%d8%b5%d8%a9-%d8%a3%d9%86%d8%a8%d9%88%d8%a8-%d8%a7%d9%84%d8%ad%d9%81%d8%b1-%d9%85%d9%82%d8%a7%d8%a8%d9%84-api-5dp-%d8%a3%d9%86%d8%a8%d9%88%d8%a8-%d8%a7%d9%84%d8%ad","status":"publish","type":"post","link":"https:\/\/www.drillpipes.com\/ar\/%d9%85%d8%a7%d8%af%d8%a9-%d8%ae%d8%a7%d8%b5%d8%a9-%d8%a3%d9%86%d8%a8%d9%88%d8%a8-%d8%a7%d9%84%d8%ad%d9%81%d8%b1-%d9%85%d9%82%d8%a7%d8%a8%d9%84-api-5dp-%d8%a3%d9%86%d8%a8%d9%88%d8%a8-%d8%a7%d9%84%d8%ad\/","title":{"rendered":"\u0645\u0627\u062f\u0629 \u062e\u0627\u0635\u0629 \u0623\u0646\u0628\u0648\u0628 \u0627\u0644\u062d\u0641\u0631 \u0645\u0642\u0627\u0628\u0644 API 5DP \u0623\u0646\u0628\u0648\u0628 \u0627\u0644\u062d\u0641\u0631"},"content":{"rendered":"\n

Special Material Drill Pipe vs API 5DP Drill Pipe should be understood from drill-string service conditions, not only from grade names.<\/strong> During drilling, the pipe body and tool joint work under combined tensile load, rotary torque, cyclic bending, internal pressure, impact loading and connection make-up stress. API 5DP Drill Pipe provides the standard grade system for steel drill pipe with upset pipe-body ends and welded-on tool joints, including common grades such as E75, X95, G105 and S135<\/strong>, with minimum yield strength levels of 75 ksi, 95 ksi, 105 ksi and 135 ksi<\/strong> respectively.<\/p>\n\n

Special Material Drill Pipe is not a universal API grade name.<\/strong> It refers to a controlled material route used when standard API grade selection cannot fully cover the actual service risk, such as high hook load in deep wells, repeated bending in long horizontal sections, sour-service cracking sensitivity, low-temperature impact risk, or high-torque connection demand. The review therefore moves beyond yield strength alone and connects chemistry control, heat treatment, Charpy impact toughness, hardness, fatigue-sensitive upset transition areas, tool joint matching and inspection records<\/strong> into one performance evaluation. In simple terms, API 5DP Drill Pipe defines the standard baseline; Special Material Drill Pipe is reviewed when the drilling condition requires additional verified performance beyond that baseline.<\/p>\n\n

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API 5DP \u0623\u0646\u0628\u0648\u0628 \u0627\u0644\u062d\u0641\u0631: The Standard Baseline<\/h2>\n\n

API 5DP Drill Pipe<\/a> works as the standard baseline before discussing any special material route. It defines drill pipe as a complete assembly, not only a pipe body: the pipe body has upset ends, the tool joints are welded on, and the final product is reviewed by grade, dimension, connection, PSL level, marking and inspection records.<\/p>\n\n

The common API 5DP \u0623\u0646\u0628\u0648\u0628 \u0627\u0644\u062d\u0641\u0631 \u0627\u0644\u062f\u0631\u062c\u0629s<\/strong> iNClude E75, X95, G105 and S135<\/strong>. The \u0627\u0644\u062f\u0631\u062c\u0629 number corresponds to the minimum \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u062e\u0636\u0648\u0639 in ksi, so E75 starts at 75 ksi<\/strong>, X95 at 95 ksi<\/strong>, G105 at 105 ksi<\/strong>, and S135 at 135 ksi<\/strong>. This \u0627\u0644\u062f\u0631\u062c\u0629 ladder gives engineers a standard way to match \u0623\u0646\u0628\u0648\u0628 \u0627\u0644\u062d\u0641\u0631 strength with \u0627\u0644\u062d\u0641\u0631 load, \u0627\u0644\u0628\u0626\u0631 depth, \u0627\u0644\u0648\u0635\u0644\u0629 requirement and inspection level.<\/p>\n\n

API 5DP Control Item<\/th>What It Means in \u0623\u0646\u0628\u0648\u0628 \u0627\u0644\u062d\u0641\u0631 Review<\/th><\/tr><\/thead>
\u0627\u0644\u062f\u0631\u062c\u0629<\/td>Defines the basic strength level, such as E75, X95, G105 or S135<\/td><\/tr>
\u0627\u0644\u0623\u0646\u0627\u0628\u064a\u0628 body<\/td>Controls OD, \u0633\u0645\u0627\u0643\u0629 \u0627\u0644\u062c\u062f\u0627\u0631, upset type and mechanical properties<\/td><\/tr>
\u0627\u0644\u0648\u0635\u0644\u0629<\/td>Controls \u0627\u0644\u0648\u0635\u0644\u0629 type, shoulder area, \u0627\u0644\u062e\u064a\u0637 condition and \u0639\u0632\u0645 \u0627\u0644\u062f\u0648\u0631\u0627\u0646 transfer<\/td><\/tr>
PSL level<\/td>Adds dIFferent levels of technical and inspection requirements<\/td><\/tr>
Mechanical testing<\/td>VerIFies \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u062e\u0636\u0648\u0639, \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0634\u062f and elongation<\/td><\/tr>
Marking and traceability<\/td>Links \u0627\u0644\u0623\u0646\u0627\u0628\u064a\u0628 identity with heat number, MTC and inspection records<\/td><\/tr><\/tbody><\/table><\/figure>\n\n

\u0645\u0627\u062f\u0629 \u062e\u0627\u0635\u0629 \u0623\u0646\u0628\u0648\u0628 \u0627\u0644\u062d\u0641\u0631 starts from this same baseline but adds another layer of \u0627\u0644\u0645\u0627\u062f\u0629 and \u0627\u0644\u0623\u062f\u0627\u0621 review. When \u0627\u0644\u062d\u0641\u0631 conditions involve higher tensile load, repeated bending, severe dogleg, low-temperature exposure, sour-service risk or high-\u0639\u0632\u0645 \u0627\u0644\u062f\u0648\u0631\u0627\u0646 operation, the review moves beyond \u0627\u0644\u062f\u0631\u062c\u0629 name and basic dimensions. Chemistry control, heat treatment, hardness, Charpy iMPact toughness, \u0627\u0644\u062a\u0639\u0628-sensitive transition areas and \u0627\u0644\u0648\u0635\u0644\u0629 matching become part of the technical evaluation.<\/p>\n\n

API 5DP \u0623\u0646\u0628\u0648\u0628 \u0627\u0644\u062d\u0641\u0631 \u0627\u0644\u062f\u0631\u062c\u0629s and Mechanical Strength<\/h2>\n\n

API 5DP \u0623\u0646\u0628\u0648\u0628 \u0627\u0644\u062d\u0641\u0631 \u0627\u0644\u062f\u0631\u062c\u0629s are mainly separated by yield-strength level. This strength ladder gives a clear baseline before coMParing standard API \u0623\u0646\u0628\u0648\u0628 \u0627\u0644\u062d\u0641\u0631 with any \u0645\u0627\u062f\u0629 \u062e\u0627\u0635\u0629 route. E75, X95, G105 and S135 do not only represent dIFferent \u0627\u0644\u062f\u0631\u062c\u0629 names; they define dIFferent yield-strength windows that affect tensile capacity, \u0627\u0644\u062d\u0641\u0631 load margin and the first level of \u0633\u0627\u0642 \u0627\u0644\u062d\u0641\u0631 \u0627\u0644\u0627\u062e\u062a\u064a\u0627\u0631.<\/p>\n\n

API 5DP \u0627\u0644\u062f\u0631\u062c\u0629<\/th>Minimum \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u062e\u0636\u0648\u0639<\/th>Maximum \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u062e\u0636\u0648\u0639<\/th>Minimum \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0634\u062f<\/th>\u0627\u0644\u062f\u0631\u062c\u0629 Meaning<\/th><\/tr><\/thead>
E75<\/mark><\/a><\/td>75 ksi \/ 517 MPa<\/td>105 ksi \/ 724 MPa<\/td>100 ksi \/ 689 MPa<\/td>Lower-strength API \u0623\u0646\u0628\u0648\u0628 \u0627\u0644\u062d\u0641\u0631 \u0627\u0644\u062f\u0631\u062c\u0629 for moderate \u0627\u0644\u062d\u0641\u0631 loads<\/td><\/tr>
X95<\/td>95 ksi \/ 655 MPa<\/td>125 ksi \/ 862 MPa<\/td>105 ksi \/ 724 MPa<\/td>Intermediate strength \u0627\u0644\u062f\u0631\u062c\u0629 for deeper or higher-load sections<\/td><\/tr>
G105<\/mark><\/a><\/td>105 ksi \/ 724 MPa<\/td>135 ksi \/ 931 MPa<\/td>115 ksi \/ 793 MPa<\/td>Higher-strength \u0627\u0644\u062f\u0631\u062c\u0629 with iNCreased tensile load capacity<\/td><\/tr>
S135<\/td>135 ksi \/ 931 MPa<\/td>165 ksi \/ 1138 MPa<\/td>145 ksi \/ 1000 MPa<\/td>Common high-strength API \u0623\u0646\u0628\u0648\u0628 \u0627\u0644\u062d\u0641\u0631 \u0627\u0644\u062f\u0631\u062c\u0629 for demanding \u0627\u0644\u062d\u0641\u0631 loads<\/td><\/tr><\/tbody><\/table><\/figure>\n\n