{"id":15851,"date":"2026-08-19T14:24:50","date_gmt":"2026-08-19T06:24:50","guid":{"rendered":"https:\/\/www.drillpipes.com\/api-%d1%81%d0%bf%d0%b5%d1%86%d0%b8%d1%84%d0%b8%d0%ba%d0%b0%d1%86%d0%b8%d1%8f-7-1-%d1%81%d1%82%d0%b0%d0%bd%d0%b4%d0%b0%d1%80%d1%82-for-rotary-%d0%b1%d1%83%d1%80-stem-elements\/"},"modified":"2026-09-18T16:08:20","modified_gmt":"2026-09-18T08:08:20","slug":"api-%d1%81%d0%bf%d0%b5%d1%86%d0%b8%d1%84%d0%b8%d0%ba%d0%b0%d1%86%d0%b8%d1%8f-7-1-%d1%81%d1%82%d0%b0%d0%bd%d0%b4%d0%b0%d1%80%d1%82-for-rotary-%d0%b1%d1%83%d1%80-stem-elements","status":"publish","type":"post","link":"https:\/\/www.drillpipes.com\/ru\/api-%d1%81%d0%bf%d0%b5%d1%86%d0%b8%d1%84%d0%b8%d0%ba%d0%b0%d1%86%d0%b8%d1%8f-7-1-%d1%81%d1%82%d0%b0%d0%bd%d0%b4%d0%b0%d1%80%d1%82-for-rotary-%d0%b1%d1%83%d1%80-stem-elements\/","title":{"rendered":"API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 for Rotary \u0431\u0443\u0440 Stem Elements"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 is the API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f for covered rotary \u0431\u0443\u0440 stem elements used in the \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u043a\u043e\u043b\u043e\u043d\u043d\u0430 and bottom-hole assembly, iNCluding \u0443\u0442\u044f\u0436\u0435\u043b\u0451\u043d\u043d\u0430\u044f \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430s, heavy \u0432\u0435\u0441 \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430, kellys, \u0431\u0443\u0440 stem subs, kelly valves and stabilizers. These components are not \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430,they are used to add \u0432\u0435\u0441 and stIFfness, transmit \u043a\u0440\u0443\u0442\u044f\u0449\u0438\u0439 \u043c\u043e\u043c\u0435\u043d\u0442, connect \u0431\u0443\u0440-string sections, stabilize the BHA, or tensile, compressive and bending loads. The API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 defines the main manufacturing, \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f, marking and release requirements for these products. In procurement documents, API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 helps convert product names such as \u0443\u0442\u044f\u0436\u0435\u043b\u0451\u043d\u043d\u0430\u044f \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430, HWDP or stabilizer into measurable ordering and acceptaNCe requirements.In practical use, API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 refers to the \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f designation used in RFQs, quotations, purchase orders and product descriptions. The API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 refers to the complete technical document used to control production, \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f and \u043f\u043e\u0441\u0442\u0430\u0432\u043a\u0430 acceptaNCe.<\/p>\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-SPEC-7-1-Standard-for-Rotary-Drill-Stem-Elements-1024x576.jpg\" alt=\"\" class=\"wp-image-13984\" style=\"width:1137px;height:auto\" srcset=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-SPEC-7-1-Standard-for-Rotary-Drill-Stem-Elements-1024x576.jpg 1024w, https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-SPEC-7-1-Standard-for-Rotary-Drill-Stem-Elements-300x169.jpg 300w, https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-SPEC-7-1-Standard-for-Rotary-Drill-Stem-Elements.jpg 1672w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">For buyers, the key point is to apply the correct \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 to the correct product. API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 is used for covered rotary \u0431\u0443\u0440 stem elements. \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430 should normally be \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044fIFied under API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 5DP, while rotary shouldered \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 \u043d\u0430\u0440\u0435\u0437\u0430\u043d\u0438\u0435 \u0440\u0435\u0437\u044c\u0431\u044b and gauging should be reviewed under API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-2.<\/p>\n\n<h2 class=\"wp-block-heading\"><strong>API SPEC 7-1 Latest Edition and Document Status<\/strong><strong><\/strong><\/h2>\n\n<p class=\"wp-block-paragraph\">For procurement and \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f planning, the applicable edition of <strong>API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1<\/strong>\u00a0should be confirmed before the RFQ or purchase order is issued. Current \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442-store records list <strong>API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1, Rotary \u0431\u0443\u0440 Stem Elements, Second Edition, February 2023<\/strong>, with later updates iNCluding Errata 1, Addendum 1 and Errata 2. API\u2019s official Errata 2 notice also identIFies the affected publication as <strong>API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1, Rotary \u0431\u0443\u0440 Stem Elements, Second Edition, February 2023<\/strong>.<\/p>\n\n<p class=\"wp-block-paragraph\">This edition check matters because the \u043f\u043e\u0441\u0442\u0430\u0432\u0449\u0438\u043a, buyer and third-party in\u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044ftor should work from the same controlled \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 basis. IF the purchase order only states \u201cAPI 7-1\u201d without edition or update requirements, acceptaNCe details may be interpreted dIFferently during production, \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f or final document review.<\/p>\n\n<p class=\"wp-block-paragraph\">A clear RFQ should state the required API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 edition, applicable addenda or errata, product type, \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 requirement, \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f scope and release documents. This keeps the \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442, NDT report, \u0440\u0430\u0437\u043c\u0435\u0440al \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f, \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 gauging record and marking review aligned with the same \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 basis.<\/p>\n\n<h2 class=\"wp-block-heading\"><strong>Products Covered by API SPEC 7-1<\/strong><strong><\/strong><\/h2>\n\n<p class=\"wp-block-paragraph\">API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 covers selected <strong>rotary \u0431\u0443\u0440 stem elements<\/strong>\u00a0used in the \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u043a\u043e\u043b\u043e\u043d\u043d\u0430 and bottom-hole assembly. These products are not grouped only by name; they are controlled because they transmit \u043a\u0440\u0443\u0442\u044f\u0449\u0438\u0439 \u043c\u043e\u043c\u0435\u043d\u0442, add stIFfness or \u0432\u0435\u0441, connect dIFferent \u0431\u0443\u0440-string members, stabilize the BHA, or provide a defined interface for \u0431\u0443\u0440\u0435\u043d\u0438\u0435 and coring tools.<\/p>\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-SPEC-7-1-PRODUCT-GROUP-SUMMARY-1024x683.jpg\" alt=\"\" class=\"wp-image-14017\" style=\"aspect-ratio:1.4992793575987737;width:1200px;height:auto\" srcset=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-SPEC-7-1-PRODUCT-GROUP-SUMMARY-1024x683.jpg 1024w, https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-SPEC-7-1-PRODUCT-GROUP-SUMMARY-300x200.jpg 300w, https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-SPEC-7-1-PRODUCT-GROUP-SUMMARY.jpg 1535w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">For procurement, the important point is to confirm whether the ordered item is actually within the API 7-1 product scope, and then define the correct \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b, geometry, \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435, \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f and release documents. A product name alone is not enough for technical acceptaNCe.<\/p>\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API_SPEC_7-1_Product_Scope_and_Ordering_Matrix.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"\u0412\u0441\u0442\u0430\u0432\u043a\u0430 API_SPEC_7-1_Product_Scope_and_Ordering_Matrix\"><\/object><a id=\"wp-block-file--media-2a7dd902-c537-4ce2-a103-73e6ad823d27\" href=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API_SPEC_7-1_Product_Scope_and_Ordering_Matrix.pdf\">API_\u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f_7-1_Product_Scope_and_Ordering_Matrix<\/a><\/div>\n\n<h2 class=\"wp-block-heading\"><strong>API SPEC 7-1, API SPEC 7-2 and API SPEC 5DP: Correct Stand<\/strong><strong><\/strong><\/h2>\n\n<p class=\"wp-block-paragraph\">API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1, API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-2 and API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 5DP are often mentioned together in \u0431\u0443\u0440-string procurement, but they do not control the same part of the product. <strong>API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-<\/strong>\u00a0applies to sele<strong>API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-2<\/strong>\u00a0controls rotar<strong>API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 5<\/strong>\u00a0applies to standa<\/p>\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"519\" src=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-SPEC-7-1-API-SPEC-7-2-and-API-SPEC-5DP-Correct-Standard-Scope-e1783325930512-1024x519.jpg\" alt=\"\" class=\"wp-image-13989\" style=\"width:1139px;height:auto\" srcset=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-SPEC-7-1-API-SPEC-7-2-and-API-SPEC-5DP-Correct-Standard-Scope-e1783325930512-1024x519.jpg 1024w, https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-SPEC-7-1-API-SPEC-7-2-and-API-SPEC-5DP-Correct-Standard-Scope-e1783325930512-300x152.jpg 300w, https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-SPEC-7-1-API-SPEC-7-2-and-API-SPEC-5DP-Correct-Standard-Scope-e1783325930512-768x389.jpg 768w, https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-SPEC-7-1-API-SPEC-7-2-and-API-SPEC-5DP-Correct-Standard-Scope-e1783325930512-1536x778.jpg 1536w, https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-SPEC-7-1-API-SPEC-7-2-and-API-SPEC-5DP-Correct-Standard-Scope-e1783325930512.jpg 1672w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">The simplest way to separate them is this: <strong>API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 controls the covered \u0431\u0443\u0440\u0435\u043d\u0438\u0435 component, API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-2 controls the rotary shouldered \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435, and API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 5DP controls \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">A \u0443\u0442\u044f\u0436\u0435\u043b\u0451\u043d\u043d\u0430\u044f \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430, HWDP, kelly, sub or stabilizer may be ordered under <strong>API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1<\/strong>, but its \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 should still be checked according to <strong>API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-2<\/strong>\u00a0when a rotary shouldered \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 is involved. \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430 should normally be \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044fIFied under <strong>API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 5DP<\/strong>, because the \u0442\u0440\u0443\u0431\u0430 body, \u043a\u043b\u0430\u0441\u0441, PSL, upset ends, \u0441\u0432\u0430\u0440\u043d\u043e\u0439 \u0437\u0430\u043c\u043a\u043e\u0432\u043e\u0435 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435s and \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430 \u043f\u043e\u0441\u0442\u0430\u0432\u043a\u0430 requirements belong to that \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 logic.<\/p>\n\n<p class=\"wp-block-paragraph\">For HWDP, API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 should be used for the product body, \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b control, \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f and release requirements, while API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-2 should be \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044fIFied for rotary shouldered \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 \u043d\u0430\u0440\u0435\u0437\u0430\u043d\u0438\u0435 \u0440\u0435\u0437\u044c\u0431\u044b and gauging. For \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430, API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 5DP should be used for the \u0442\u0440\u0443\u0431\u0430 body, \u043a\u043b\u0430\u0441\u0441, PSL, upset ends and \u0441\u0432\u0430\u0440\u043d\u043e\u0439 \u0437\u0430\u043c\u043a\u043e\u0432\u043e\u0435 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435s, while API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-2 should still be used for the \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435. This prevents the \u043f\u043e\u0441\u0442\u0430\u0432\u0449\u0438\u043a, buyer and third-party in\u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044ftor from using dIFferent acceptaNCe criteria during production, \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f and final document review.<\/p>\n\n<p class=\"wp-block-paragraph\">API 7-2 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 acceptaNCe should be supported by \u0440\u0435\u0437\u044c\u0431\u0430 gauging records and shoulder-condition checks. API 5DP \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430 should iNClude \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430 body, \u0437\u0430\u043c\u043a\u043e\u0432\u043e\u0435 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435, weld-zone, \u043a\u043b\u0430\u0441\u0441, PSL and traceability records. This \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 separation makes the purchase order easier to in\u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044ft and reduces disputes before shipment release.<\/p>\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API_SPEC_7-1_7-2_5DP_Standard_Boundary_Guide-6.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"\u0412\u0441\u0442\u0430\u0432\u043a\u0430 API_SPEC_7-1_7-2_5DP_Standard_Boundary_Guide\"><\/object><a id=\"wp-block-file--media-20351965-78d5-4cae-956d-dfd5cf7e5c41\" href=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API_SPEC_7-1_7-2_5DP_Standard_Boundary_Guide-6.pdf\">API_\u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f_7-1_7-2_5DP_\u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442_Boundary_Guide<\/a><a href=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API_SPEC_7-1_7-2_5DP_Standard_Boundary_Guide-6.pdf\" class=\"wp-block-file__button wp-element-button\" download=\"\" aria-describedby=\"wp-block-file--media-20351965-78d5-4cae-956d-dfd5cf7e5c41\">Download<\/a><\/div>\n\n<h2 class=\"wp-block-heading\"><strong>RFQ and Standard Scope Review for API SPEC 7-1<\/strong><\/h2>\n\n<p class=\"wp-block-paragraph\">Before issuing an RFQ or purchase order, the buyer should first confirm whether the ordered item belongs to <strong>API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1<\/strong> scope or another API \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442. API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 applies to covered rotary \u0431\u0443\u0440 stem elements such as <strong>HWDP, \u0443\u0442\u044f\u0436\u0435\u043b\u0451\u043d\u043d\u0430\u044f \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430s, kellys, \u0431\u0443\u0440 stem subs and stabilizers<\/strong>. \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430 should normally be \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044fIFied under <strong>API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 5DP<\/strong>, while rotary shouldered \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 \u043d\u0430\u0440\u0435\u0437\u0430\u043d\u0438\u0435 \u0440\u0435\u0437\u044c\u0431\u044b and gauging should be controlled under <strong>API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-2<\/strong>.<\/p>\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-7-1-RFQ-to-Shipment-Release-Workflow-1024x576.jpg\" alt=\"\" class=\"wp-image-13992\" style=\"width:1181px;height:auto\" srcset=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-7-1-RFQ-to-Shipment-Release-Workflow-1024x576.jpg 1024w, https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-7-1-RFQ-to-Shipment-Release-Workflow-300x169.jpg 300w, https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-7-1-RFQ-to-Shipment-Release-Workflow.jpg 1672w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">This \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 separation is important because one \u0431\u0443\u0440-string package may iNClude several dIFferent products. A \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430 line may require API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 5DP for the \u0442\u0440\u0443\u0431\u0430 body, \u043a\u043b\u0430\u0441\u0441, PSL, upset ends and \u0441\u0432\u0430\u0440\u043d\u043e\u0439 \u0437\u0430\u043c\u043a\u043e\u0432\u043e\u0435 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435s. An HWDP or \u0443\u0442\u044f\u0436\u0435\u043b\u0451\u043d\u043d\u0430\u044f \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430 line may require API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 for product manufacturing, \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f, marking and \u043f\u043e\u0441\u0442\u0430\u0432\u043a\u0430 release. The \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 on either product may still require API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-2 for \u0440\u0435\u0437\u044c\u0431\u0430 form, shoulder condition, \u0440\u0430\u0437\u043c\u0435\u0440al conformity and gauging records.<\/p>\n\n<p class=\"wp-block-paragraph\"> The purchase order should not rely only on a general product name such as \u201c\u0443\u0442\u044f\u0436\u0435\u043b\u0451\u043d\u043d\u0430\u044f \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430\u201d or \u201cHWDP.\u201d It should state the applicable \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 edition, OD, ID, \u0434\u043b\u0438\u043d\u0430, \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 type, \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b \u043a\u043b\u0430\u0441\u0441, NDT scope, \u0440\u0430\u0437\u043c\u0435\u0440al \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f, \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 gauging requirement and final document package.<\/p>\n\n<p class=\"wp-block-paragraph\">A practical RFQ line may be written as follows:<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Heavy Weight Drill Pipe, API SPEC 7-1, 5 in OD, NC50 connection, welded or integral construction as specified, API SPEC 7-2 thread gauging required, NDT and dimensional inspection per approved ITP, MTC, heat-treatment record, hardness report, connection gauging record, final inspection report and packing list required.<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">For \u0443\u0442\u044f\u0436\u0435\u043b\u0451\u043d\u043d\u0430\u044f \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430s, kellys, subs and stabilizers, the same logic applies: confirm the correct \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 first, then define the product geometry, \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 requirement, \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f scope and release records. IF <strong>API \u043c\u043e\u043d\u043e\u0433\u0440\u0430\u043c\u043c\u0430 marking<\/strong> is required, it should be written as a separate purchase requirement rather than assumed from API 7-1 compliaNCe.<\/p>\n\n<p class=\"wp-block-paragraph\">This approach helps the \u043f\u043e\u0441\u0442\u0430\u0432\u0449\u0438\u043a, buyer and third-party in\u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044ftor work from the same technical basis. It also reduces disputes during production, document review and shipment release, e\u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044fially when API 7-1 products, API 5DP \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430 and API 7-2 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435s appear in the same order.<\/p>\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API_SPEC_7-1_RFQ_and_PO_Review_Checklist_v2.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"\u0412\u0441\u0442\u0430\u0432\u043a\u0430 API_SPEC_7-1_RFQ_and_PO_Review_Checklist_v2\"><\/object><a id=\"wp-block-file--media-634f2868-fa85-4b0a-925b-a7ceb3c75c9f\" href=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API_SPEC_7-1_RFQ_and_PO_Review_Checklist_v2.pdf\">API_\u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f_7-1_RFQ_and_PO_Review_Checklist_v2<\/a><a href=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API_SPEC_7-1_RFQ_and_PO_Review_Checklist_v2.pdf\" class=\"wp-block-file__button wp-element-button\" download=\"\" aria-describedby=\"wp-block-file--media-634f2868-fa85-4b0a-925b-a7ceb3c75c9f\">Download<\/a><\/div>\n\n<h2 class=\"wp-block-heading\">API \u043c\u043e\u043d\u043e\u0433\u0440\u0430\u043c\u043c\u0430 Marking and API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 CompliaNCe<\/h2>\n\n<p class=\"wp-block-paragraph\">API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 compliaNCe and API \u043c\u043e\u043d\u043e\u0433\u0440\u0430\u043c\u043c\u0430 marking are dIFferent purchase requirements.<\/p>\n\n<p class=\"wp-block-paragraph\">API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 compliaNCe means the product is \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0441\u0442\u0432\u043ed, in\u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044fted and released according to the applicable API 7-1 technical requirements. API \u043c\u043e\u043d\u043e\u0433\u0440\u0430\u043c\u043c\u0430 marking means the product is marked by an API-licensed \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c within its approved license scope.<\/p>\n\n<p class=\"wp-block-paragraph\">For procurement, the RFQ or purchase order should clearly state whether API \u043c\u043e\u043d\u043e\u0433\u0440\u0430\u043c\u043c\u0430 marking is required. IF API \u043c\u043e\u043d\u043e\u0433\u0440\u0430\u043c\u043c\u0430 is not required, the buyer should still request complete API 7-1 compliaNCe documents, iNCluding MTC, heat-treatment record, \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f reports, \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 gauging record, marking verIFication and packing-list traceability.<\/p>\n\n<h2 class=\"wp-block-heading\">API 7-1 AcceptaNCe Checks and Required Release Records<\/h2>\n\n<p class=\"wp-block-paragraph\">API 7-1 acceptaNCe is not only a document collection process. Each \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f item should prove that the delivered rotary \u0431\u0443\u0440 stem element matches the purchase order, the approved product scope and the agreed technical requirements. For buyers and third-party in\u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044ftors, the main purpose is to confirm three things before shipment release: the product is correctly identIFied, the critical manufacturing steps are controlled, and the final records are traceable to the same heat number, lot number and product marking.<\/p>\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"725\" height=\"1024\" src=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-7-1-ACCEPTANCE-REVIEW-CHECKLIST-725x1024.jpg\" alt=\"\" class=\"wp-image-14067\" style=\"aspect-ratio:0.7080120683875293;width:993px;height:auto\" srcset=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-7-1-ACCEPTANCE-REVIEW-CHECKLIST-725x1024.jpg 725w, https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-7-1-ACCEPTANCE-REVIEW-CHECKLIST-212x300.jpg 212w, https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-7-1-ACCEPTANCE-REVIEW-CHECKLIST.jpg 1055w\" sizes=\"auto, (max-width: 725px) 100vw, 725px\" \/><\/figure>\n\n<p class=\"wp-block-paragraph\">The release package should show one continuous traceability chain: <strong>product marking \u2192 heat number \u2192 MTC \u2192 heat-treatment record \u2192 mechanical test report \u2192 \u0442\u0432\u0435\u0440\u0434\u043e\u0441\u0442\u044c record \u2192 NDT report \u2192 \u0440\u0430\u0437\u043c\u0435\u0440al \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f \u2192 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 gauging record \u2192 final \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f \u2192 packing list<\/strong>.<\/p>\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-7-1-PRODUCT-TRACEABILITY-CHAIN-1024x576.jpg\" alt=\"\" class=\"wp-image-13982\" style=\"width:1200px;height:auto\" srcset=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-7-1-PRODUCT-TRACEABILITY-CHAIN-1024x576.jpg 1024w, https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-7-1-PRODUCT-TRACEABILITY-CHAIN-300x169.jpg 300w, https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/07\/API-7-1-PRODUCT-TRACEABILITY-CHAIN.jpg 1672w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<h2 class=\"wp-block-heading\">CoNClusion<\/h2>\n\n<p class=\"wp-block-paragraph\">API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 should be used as a practical purchasing and \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f basis for covered rotary \u0431\u0443\u0440 stem elements, not just as a \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 name in a quotation. For products such as HWDP, \u0443\u0442\u044f\u0436\u0435\u043b\u0451\u043d\u043d\u0430\u044f \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430s, kellys, \u0431\u0443\u0440 stem subs and stabilizers, buyers should confirm the product scope, \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b \u043a\u043b\u0430\u0441\u0441, \u0442\u0435\u0440\u043c\u043e\u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0430, \u0440\u0430\u0437\u043c\u0435\u0440s, \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 type, \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f requirements and final release documents before production starts.<\/p>\n\n<p class=\"wp-block-paragraph\">The safest approach is to match each item with the correct \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442. API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 applies to covered rotary \u0431\u0443\u0440 stem elements, API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-2 should be used for rotary shouldered \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 \u043d\u0430\u0440\u0435\u0437\u0430\u043d\u0438\u0435 \u0440\u0435\u0437\u044c\u0431\u044b and gauging, and API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 5DP should be used for \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430. This avoids confusion between product-body requirements, \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 requirements and \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430 \u043f\u043e\u0441\u0442\u0430\u0432\u043a\u0430 requirements.<\/p>\n\n<p class=\"wp-block-paragraph\">Before shipment release, the buyer should review a complete traceability package, iNCluding MTC, heat-treatment record, mechanical test report, \u0442\u0432\u0435\u0440\u0434\u043e\u0441\u0442\u044c record, NDT report, \u0440\u0430\u0437\u043c\u0435\u0440al \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f, \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 gauging record, marking verIFication and packing list. When these records match the product marking and purchase order, the API 7-1 product can be in\u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044fted, accepted and released with much less technical risk.<\/p>\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-d61d70aa wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-primary-color has-secondary-background-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/www.drillpipes.com\/ru\/%d0%ba%d0%be%d0%bd%d1%82%d0%b0%d0%ba%d1%82%d1%8b\/\">Free quotation<\/a><\/div>\n<\/div>\n\n<h2 class=\"wp-block-heading has-secondary-color has-text-color has-link-color wp-elements-1\">FAQ<\/h2>\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Q: What is API SPEC 7-1 used for?<\/strong><\/summary>\n<p class=\"wp-block-paragraph\"><strong>A:<\/strong>\u00a0API SPEC 7-1 is used for rotary drill stem elements such as drill collars, HWDP, kellys, drill stem subs and stabilizers. It helps define product scope, material, manufacturing, inspection, marking and delivery requirements.<\/p>\n<\/details>\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Q: What is the latest edition of API SPEC 7-1?<\/strong><\/summary>\n<p class=\"wp-block-paragraph\"><strong>A:<\/strong>\u00a0Current standard-store records list API Spec 7-1 as the Second Edition, published in February 2023, with Errata 1, Addendum 1 and Errata 2 updates included. Project teams should verify the controlled edition and updates before issuing a PO.<\/p>\n<\/details>\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Q: Does API SPEC 7-1 cover standard drill pipe?<\/strong><\/summary>\n<p class=\"wp-block-paragraph\"><strong>A:<\/strong>\u00a0No. Standard drill pipe is normally specified under API SPEC 5DP. API SPEC 7-1 covers rotary drill stem elements such as HWDP, drill collars, kellys, subs and stabilizers.<\/p>\n<\/details>\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Q: What is the difference between API SPEC 7-1 and API SPEC 7-2?<\/strong><\/summary>\n<p class=\"wp-block-paragraph\"><strong>A:<\/strong>\u00a0API SPEC 7-1 covers selected rotary drill stem elements as products. API SPEC 7-2 covers threading and gauging requirements for rotary shouldered connections.<\/p>\n<\/details>\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary><strong>Q: Should API Monogram be written in the purchase order?<\/strong><\/summary>\n<p class=\"wp-block-paragraph\"><strong>A:<\/strong>\u00a0Yes. If the project requires API Monogram marking, it should be stated clearly in the RFQ and PO. API 7-1 compliance and API Monogram marking are related, but they are not the same purchase requirement.<\/p>\n<\/details>\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"410\" src=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/05\/OCTAL-Certifications-1024x410.png\" alt=\"\" class=\"wp-image-12635\" srcset=\"https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/05\/OCTAL-Certifications-1024x410.png 1024w, https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/05\/OCTAL-Certifications-300x120.png 300w, https:\/\/www.drillpipes.com\/wp-content\/uploads\/2026\/05\/OCTAL-Certifications-2000x800.png 2000w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 is the API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f for covered rotary \u0431\u0443\u0440 stem elements used in the \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u043a\u043e\u043b\u043e\u043d\u043d\u0430 and bottom-hole assembly, iNCluding \u0443\u0442\u044f\u0436\u0435\u043b\u0451\u043d\u043d\u0430\u044f \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430s, heavy \u0432\u0435\u0441 \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430, kellys, \u0431\u0443\u0440 stem subs, kelly valves and stabilizers. These components are not \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u0442\u0440\u0443\u0431\u0430,they are used to add \u0432\u0435\u0441 and stIFfness, transmit \u043a\u0440\u0443\u0442\u044f\u0449\u0438\u0439 \u043c\u043e\u043c\u0435\u043d\u0442, connect &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.drillpipes.com\/ru\/api-%d1%81%d0%bf%d0%b5%d1%86%d0%b8%d1%84%d0%b8%d0%ba%d0%b0%d1%86%d0%b8%d1%8f-7-1-%d1%81%d1%82%d0%b0%d0%bd%d0%b4%d0%b0%d1%80%d1%82-for-rotary-%d0%b1%d1%83%d1%80-stem-elements\/\" class=\"more-link\">\u0427\u0438\u0442\u0430\u0442\u044c \u0434\u0430\u043b\u0435\u0435<span class=\"screen-reader-text\"> &#171;API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 for Rotary \u0431\u0443\u0440 Stem Elements&#187;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":15867,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","footnotes":""},"categories":[106],"tags":[],"class_list":["post-15851","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-106"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 for Rotary \u0431\u0443\u0440 Stem Elements<\/title>\n<meta name=\"description\" content=\"API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 controls rotary \u0431\u0443\u0440 stem elements used in \u0431\u0443\u0440\u0438\u043b\u044c\u043d\u0430\u044f \u043a\u043e\u043b\u043e\u043d\u043d\u0430s and BHA assemblies,defines rotary \u0431\u0443\u0440 stem elements, guides \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b control, \u0438\u043d\u0441\u043f\u0435\u043a\u0446\u0438\u044f, \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 review and release traceability.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.drillpipes.com\/ru\/api-%d1%81%d0%bf%d0%b5%d1%86%d0%b8%d1%84%d0%b8%d0%ba%d0%b0%d1%86%d0%b8%d1%8f-7-1-%d1%81%d1%82%d0%b0%d0%bd%d0%b4%d0%b0%d1%80%d1%82-for-rotary-%d0%b1%d1%83%d1%80-stem-elements\/\" \/>\n<meta property=\"og:locale\" content=\"ru_RU\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"API \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f 7-1 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 for Rotary \u0431\u0443\u0440 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