API спецификация 7-1 is the API спецификация for covered rotary бур stem elements used in the бурильная колонна and bottom-hole assembly, iNCluding утяжелённая бурильная трубаs, heavy вес бурильная труба, kellys, бур stem subs, kelly valves and stabilizers. These components are not стандарт бурильная труба,they are used to add вес and stIFfness, transmit крутящий момент, connect бур-string sections, stabilize the BHA, or tensile, compressive and bending loads. The API спецификация 7-1 стандарт defines the main manufacturing, инспекция, marking and release requirements for these products. In procurement documents, API спецификация 7-1 helps convert product names such as утяжелённая бурильная труба, HWDP or stabilizer into measurable ordering and acceptaNCe requirements.In practical use, API спецификация 7-1 refers to the спецификация designation used in RFQs, quotations, purchase orders and product descriptions. The API спецификация 7-1 стандарт refers to the complete technical document used to control production, инспекция and поставка acceptaNCe.
For buyers, the key point is to apply the correct стандарт to the correct product. API спецификация 7-1 is used for covered rotary бур stem elements. стандарт бурильная труба should normally be спецификацияIFied under API спецификация 5DP, while rotary shouldered соединение нарезание резьбы and gauging should be reviewed under API спецификация 7-2.
API SPEC 7-1 Latest Edition and Document Status
For procurement and инспекция planning, the applicable edition of API спецификация 7-1 should be confirmed before the RFQ or purchase order is issued. Current стандарт-store records list API спецификация 7-1, Rotary бур 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 спецификация 7-1, Rotary бур Stem Elements, Second Edition, February 2023.
This edition check matters because the поставщик, buyer and third-party inспецификацияtor should work from the same controlled стандарт basis. IF the purchase order only states “API 7-1” without edition or update requirements, acceptaNCe details may be interpreted dIFferently during production, инспекция or final document review.
A clear RFQ should state the required API спецификация 7-1 edition, applicable addenda or errata, product type, соединение requirement, инспекция scope and release documents. This keeps the материал сертификат, NDT report, размерal инспекция, соединение gauging record and marking review aligned with the same стандарт basis.
Products Covered by API SPEC 7-1
API спецификация 7-1 covers selected rotary бур stem elements used in the бурильная колонна and bottom-hole assembly. These products are not grouped only by name; they are controlled because they transmit крутящий момент, add stIFfness or вес, connect dIFferent бур-string members, stabilize the BHA, or provide a defined interface for бурение 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 материал, geometry, соединение, инспекция 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 спецификация 7-1, API спецификация 7-2 and API спецификация 5DP are often mentioned together in бур-string procurement, but they do not control the same part of the product. API спецификация 7- applies to seleAPI спецификация 7-2 controls rotarAPI спецификация 5 applies to standa
The simplest way to separate them is this: API спецификация 7-1 controls the covered бурение component, API спецификация 7-2 controls the rotary shouldered соединение, and API спецификация 5DP controls стандарт бурильная труба.
A утяжелённая бурильная труба, HWDP, kelly, sub or stabilizer may be ordered under API спецификация 7-1, but its соединение should still be checked according to API спецификация 7-2 when a rotary shouldered соединение is involved. стандарт бурильная труба should normally be спецификацияIFied under API спецификация 5DP, because the труба body, класс, PSL, upset ends, сварной замковое соединениеs and бурильная труба поставка requirements belong to that стандарт logic.
For HWDP, API спецификация 7-1 should be used for the product body, материал control, инспекция and release requirements, while API спецификация 7-2 should be спецификацияIFied for rotary shouldered соединение нарезание резьбы and gauging. For стандарт бурильная труба, API спецификация 5DP should be used for the труба body, класс, PSL, upset ends and сварной замковое соединениеs, while API спецификация 7-2 should still be used for the соединение. This prevents the поставщик, buyer and third-party inспецификацияtor from using dIFferent acceptaNCe criteria during production, инспекция and final document review.
API 7-2 соединение acceptaNCe should be supported by резьба gauging records and shoulder-condition checks. API 5DP бурильная труба should iNClude бурильная труба body, замковое соединение, weld-zone, класс, PSL and traceability records. This стандарт separation makes the purchase order easier to inспецификацияt 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 спецификация 7-1 scope or another API стандарт. API спецификация 7-1 applies to covered rotary бур stem elements such as HWDP, утяжелённая бурильная трубаs, kellys, бур stem subs and stabilizers. стандарт бурильная труба should normally be спецификацияIFied under API спецификация 5DP, while rotary shouldered соединение нарезание резьбы and gauging should be controlled under API спецификация 7-2.
This стандарт separation is important because one бур-string package may iNClude several dIFferent products. A стандарт бурильная труба line may require API спецификация 5DP for the труба body, класс, PSL, upset ends and сварной замковое соединениеs. An HWDP or утяжелённая бурильная труба line may require API спецификация 7-1 for product manufacturing, инспекция, marking and поставка release. The соединение on either product may still require API спецификация 7-2 for резьба form, shoulder condition, размерal conformity and gauging records.
The purchase order should not rely only on a general product name such as “утяжелённая бурильная труба” or “HWDP.” It should state the applicable стандарт edition, OD, ID, длина, соединение type, материал класс, NDT scope, размерal инспекция, соединение 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 утяжелённая бурильная трубаs, kellys, subs and stabilizers, the same logic applies: confirm the correct стандарт first, then define the product geometry, соединение requirement, инспекция scope and release records. IF API монограмма marking is required, it should be written as a separate purchase requirement rather than assumed from API 7-1 compliaNCe.
This approach helps the поставщик, buyer and third-party inспецификацияtor work from the same technical basis. It also reduces disputes during production, document review and shipment release, eспецификацияially when API 7-1 products, API 5DP бурильная труба and API 7-2 соединениеs appear in the same order.
API монограмма Marking and API спецификация 7-1 CompliaNCe
API спецификация 7-1 compliaNCe and API монограмма marking are dIFferent purchase requirements.
API спецификация 7-1 compliaNCe means the product is производствоd, inспецификацияted and released according to the applicable API 7-1 technical requirements. API монограмма marking means the product is marked by an API-licensed производитель within its approved license scope.
For procurement, the RFQ or purchase order should clearly state whether API монограмма marking is required. IF API монограмма is not required, the buyer should still request complete API 7-1 compliaNCe documents, iNCluding MTC, heat-treatment record, инспекция reports, соединение 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 инспекция item should prove that the delivered rotary бур stem element matches the purchase order, the approved product scope and the agreed technical requirements. For buyers and third-party inспецификацияtors, 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 → твердость record → NDT report → размерal инспекция → соединение gauging record → final инспекция → packing list.
CoNClusion
API спецификация 7-1 should be used as a practical purchasing and инспекция basis for covered rotary бур stem elements, not just as a стандарт name in a quotation. For products such as HWDP, утяжелённая бурильная трубаs, kellys, бур stem subs and stabilizers, buyers should confirm the product scope, материал класс, термообработка, размерs, соединение type, инспекция requirements and final release documents before production starts.
The safest approach is to match each item with the correct стандарт. API спецификация 7-1 applies to covered rotary бур stem elements, API спецификация 7-2 should be used for rotary shouldered соединение нарезание резьбы and gauging, and API спецификация 5DP should be used for стандарт бурильная труба. This avoids confusion between product-body requirements, соединение requirements and бурильная труба поставка requirements.
Before shipment release, the buyer should review a complete traceability package, iNCluding MTC, heat-treatment record, mechanical test report, твердость record, NDT report, размерal инспекция, соединение gauging record, marking verIFication and packing list. When these records match the product marking and purchase order, the API 7-1 product can be inспецификацияted, 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.
