API المواصفات 7-1 is the API المواصفات for covered rotary الحفر stem elements used in the ساق الحفر and bottom-hole assembly, iNCluding دريل كولرs, heavy الوزن أنبوب الحفر, kellys, الحفر stem subs, kelly valves and stabilizers. These components are not المعيار أنبوب الحفر,they are used to add الوزن and stIFfness, transmit عزم الدوران, connect الحفر-string sections, stabilize the BHA, or tensile, compressive and bending loads. The API المواصفات 7-1 المعيار defines the main manufacturing, التفتيش, marking and release requirements for these products. In procurement documents, API المواصفات 7-1 helps convert product names such as دريل كولر, HWDP or stabilizer into measurable ordering and acceptaNCe requirements.In practical use, API المواصفات 7-1 refers to the المواصفات designation used in RFQs, quotations, purchase orders and product descriptions. The API المواصفات 7-1 المعيار refers to the complete technical document used to control production, التفتيش and التسليم acceptaNCe.
For buyers, the key point is to apply the correct المعيار to the correct product. API المواصفات 7-1 is used for covered rotary الحفر stem elements. المعيار أنبوب الحفر should normally be المواصفاتIFied under API المواصفات 5DP, while rotary shouldered الوصلة الخيوط and gauging should be reviewed under API المواصفات 7-2.
API SPEC 7-1 Latest Edition and Document Status
For procurement and التفتيش planning, the applicable edition of API المواصفات 7-1 should be confirmed before the RFQ or purchase order is issued. Current المعيار-store records list API المواصفات 7-1, Rotary الحفر Stem Elements, Second Edition, February 2023, with later updates iNCluding Errata 1, Addendum 1 and Errata 2. API’s official Errata 2 notice also identIFies the affected publication as API المواصفات 7-1, Rotary الحفر Stem Elements, Second Edition, February 2023.
This edition check matters because the المورد, buyer and third-party inالمواصفاتtor should work from the same controlled المعيار basis. IF the purchase order only states “API 7-1” without edition or update requirements, acceptaNCe details may be interpreted dIFferently during production, التفتيش or final document review.
A clear RFQ should state the required API المواصفات 7-1 edition, applicable addenda or errata, product type, الوصلة requirement, التفتيش scope and release documents. This keeps the المادة الشهادة, NDT report, البعدal التفتيش, الوصلة gauging record and marking review aligned with the same المعيار basis.
Products Covered by API SPEC 7-1
API المواصفات 7-1 covers selected rotary الحفر stem elements used in the ساق الحفر and bottom-hole assembly. These products are not grouped only by name; they are controlled because they transmit عزم الدوران, add stIFfness or الوزن, connect dIFferent الحفر-string members, stabilize the BHA, or provide a defined interface for الحفر and coring tools.
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 المادة, geometry, الوصلة, التفتيش and release documents. A product name alone is not enough for technical acceptaNCe.
API SPEC 7-1, API SPEC 7-2 and API SPEC 5DP: Correct Stand
API المواصفات 7-1, API المواصفات 7-2 and API المواصفات 5DP are often mentioned together in الحفر-string procurement, but they do not control the same part of the product. API المواصفات 7- applies to seleAPI المواصفات 7-2 controls rotarAPI المواصفات 5 applies to standa
The simplest way to separate them is this: API المواصفات 7-1 controls the covered الحفر component, API المواصفات 7-2 controls the rotary shouldered الوصلة, and API المواصفات 5DP controls المعيار أنبوب الحفر.
A دريل كولر, HWDP, kelly, sub or stabilizer may be ordered under API المواصفات 7-1, but its الوصلة should still be checked according to API المواصفات 7-2 when a rotary shouldered الوصلة is involved. المعيار أنبوب الحفر should normally be المواصفاتIFied under API المواصفات 5DP, because the الأنابيب body, الدرجة, PSL, upset ends, ملحوم الوصلةs and أنبوب الحفر التسليم requirements belong to that المعيار logic.
For HWDP, API المواصفات 7-1 should be used for the product body, المادة control, التفتيش and release requirements, while API المواصفات 7-2 should be المواصفاتIFied for rotary shouldered الوصلة الخيوط and gauging. For المعيار أنبوب الحفر, API المواصفات 5DP should be used for the الأنابيب body, الدرجة, PSL, upset ends and ملحوم الوصلةs, while API المواصفات 7-2 should still be used for the الوصلة. This prevents the المورد, buyer and third-party inالمواصفاتtor from using dIFferent acceptaNCe criteria during production, التفتيش and final document review.
API 7-2 الوصلة acceptaNCe should be supported by الخيط gauging records and shoulder-condition checks. API 5DP أنبوب الحفر should iNClude أنبوب الحفر body, الوصلة, weld-zone, الدرجة, PSL and traceability records. This المعيار separation makes the purchase order easier to inالمواصفاتt and reduces disputes before shipment release.
RFQ and Standard Scope Review for API SPEC 7-1
Before issuing an RFQ or purchase order, the buyer should first confirm whether the ordered item belongs to API المواصفات 7-1 scope or another API المعيار. API المواصفات 7-1 applies to covered rotary الحفر stem elements such as HWDP, دريل كولرs, kellys, الحفر stem subs and stabilizers. المعيار أنبوب الحفر should normally be المواصفاتIFied under API المواصفات 5DP, while rotary shouldered الوصلة الخيوط and gauging should be controlled under API المواصفات 7-2.
This المعيار separation is important because one الحفر-string package may iNClude several dIFferent products. A المعيار أنبوب الحفر line may require API المواصفات 5DP for the الأنابيب body, الدرجة, PSL, upset ends and ملحوم الوصلةs. An HWDP or دريل كولر line may require API المواصفات 7-1 for product manufacturing, التفتيش, marking and التسليم release. The الوصلة on either product may still require API المواصفات 7-2 for الخيط form, shoulder condition, البعدal conformity and gauging records.
The purchase order should not rely only on a general product name such as “دريل كولر” or “HWDP.” It should state the applicable المعيار edition, OD, ID, الطول, الوصلة type, المادة الدرجة, NDT scope, البعدal التفتيش, الوصلة gauging requirement and final document package.
A practical RFQ line may be written as follows:
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.
For دريل كولرs, kellys, subs and stabilizers, the same logic applies: confirm the correct المعيار first, then define the product geometry, الوصلة requirement, التفتيش scope and release records. IF شعار API marking is required, it should be written as a separate purchase requirement rather than assumed from API 7-1 compliaNCe.
This approach helps the المورد, buyer and third-party inالمواصفاتtor work from the same technical basis. It also reduces disputes during production, document review and shipment release, eالمواصفاتially when API 7-1 products, API 5DP أنبوب الحفر and API 7-2 الوصلةs appear in the same order.
شعار API Marking and API المواصفات 7-1 CompliaNCe
API المواصفات 7-1 compliaNCe and شعار API marking are dIFferent purchase requirements.
API المواصفات 7-1 compliaNCe means the product is التصنيعd, inالمواصفاتted and released according to the applicable API 7-1 technical requirements. شعار API marking means the product is marked by an API-licensed الشركة المصنعة within its approved license scope.
For procurement, the RFQ or purchase order should clearly state whether شعار API marking is required. IF شعار API is not required, the buyer should still request complete API 7-1 compliaNCe documents, iNCluding MTC, heat-treatment record, التفتيش reports, الوصلة gauging record, marking verIFication and packing-list traceability.
API 7-1 AcceptaNCe Checks and Required Release Records
API 7-1 acceptaNCe is not only a document collection process. Each التفتيش item should prove that the delivered rotary الحفر stem element matches the purchase order, the approved product scope and the agreed technical requirements. For buyers and third-party inالمواصفاتtors, 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.
The release package should show one continuous traceability chain: product marking → heat number → MTC → heat-treatment record → mechanical test report → الصلابة record → NDT report → البعدal التفتيش → الوصلة gauging record → final التفتيش → packing list.
CoNClusion
API المواصفات 7-1 should be used as a practical purchasing and التفتيش basis for covered rotary الحفر stem elements, not just as a المعيار name in a quotation. For products such as HWDP, دريل كولرs, kellys, الحفر stem subs and stabilizers, buyers should confirm the product scope, المادة الدرجة, المعالجة الحرارية, البعدs, الوصلة type, التفتيش requirements and final release documents before production starts.
The safest approach is to match each item with the correct المعيار. API المواصفات 7-1 applies to covered rotary الحفر stem elements, API المواصفات 7-2 should be used for rotary shouldered الوصلة الخيوط and gauging, and API المواصفات 5DP should be used for المعيار أنبوب الحفر. This avoids confusion between product-body requirements, الوصلة requirements and أنبوب الحفر التسليم requirements.
Before shipment release, the buyer should review a complete traceability package, iNCluding MTC, heat-treatment record, mechanical test report, الصلابة record, NDT report, البعدal التفتيش, الوصلة gauging record, marking verIFication and packing list. When these records match the product marking and purchase order, the API 7-1 product can be inالمواصفاتted, accepted and released with much less technical risk.
FAQ
Q: What is API SPEC 7-1 used for?
A: API 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.
Q: What is the latest edition of API SPEC 7-1?
A: Current 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.
Q: Does API SPEC 7-1 cover standard drill pipe?
A: No. 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.
Q: What is the difference between API SPEC 7-1 and API SPEC 7-2?
A: API SPEC 7-1 covers selected rotary drill stem elements as products. API SPEC 7-2 covers threading and gauging requirements for rotary shouldered connections.
Q: Should API Monogram be written in the purchase order?
A: Yes. 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.
