API 11D1 vs ISO 14310 - what a V0 rating actually certifies
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V0 claim is checked against the design validation record behind it. You match the document, the grade, the size and the test conditions to the tool and the well you are buying for.
V0 claim is checked against the design validation record behind it. You match the document, the grade, the size and the test conditions to the tool and the well you are buying for. The ten steps below take you from the claim to that record, and then to the proof that the tool sealed once it is in the hole.
- Ask which document, edition and grade the claim means: ISO 14310 second edition V0, API Spec 11D1 legacy V0 in Annex A, V0-R or V0-HR. A bare "V0" is not a specification.
- Ask for the design validation record, the test report, for the exact model and size quoted. A brochure line is a claim, and the record is the evidence behind it.
- Read the record for the test fixture ID, the casing size and weight range claimed, and the test media. Check the rated pressure and its direction, the upper and lower temperatures of the temperature cycle, and the axial loads. Then read each hold period and its bubble result, the retrieval result for a retrievable tool, who ran the test, and whether an independent witness was present. A record missing any of these leaves part of the claim unproven.
- Compare the largest inside diameter in your casing weight range with the test fixture ID. Under API Spec 11D1, clause 6.5.2, the rating cannot stretch past the fixture.
- Ask whether your size was tested or reached by scaling from another size. Under clause 6.8.2, scaling cannot raise the pressure, temperature, load, rated ID or grade of the validated design.
- Check that the performance envelope covers your load cases: the pressure you will hold together with the tension or compression you will apply. A pressure figure read without the load beside it can sit outside the envelope you need.
- Check the element compound and the metallurgy against your well fluids as a separate line. The grade test uses water or hydraulic oil and air or nitrogen, so it does not cover them.
- Check the quality level on the order, and the plant test record for each tool against its serial number. The grade covers the design, and these cover the tool.
- If the claim says "API 11D1 monogrammed" or carries an API licence reference, look up the facility on the API Composite List at mycerts.api.org. Read its Status, and check that the products listed match what you are buying. Only Active means a licence in force, and a register entry shows a facility's licence, not that a particular tool was made under it.
- After the tool is set, rely on the barrier test, not the grade: the operator's pressure test after setting, and an inflow test where the barrier policy calls for one. These verify that this tool sealed in the hole in this well. For a swellable packer, the same holds once it has swelled.
Treat any of these as a red flag:
- "V0" with no document, edition or suffix.
- "ISO 14310 certified" with no issuer.
- A grade with no size or casing range attached.
- A test record with no fixture ID or no test temperatures.
- Leak figures that match no published grade definition.
- A V0 on a swellable packer that cites ISO 14310.
- A licence reference that cannot be found on the API Composite List.
Apply the same ten checks to every supplier you are qualifying, the publisher of this page included. The same care applies to this page, which has limits of its own.
What does this page not cover?
This page explains what API 11D1 and ISO 14310 validation grades mean and how to check a claim; it does not do the five things below.
- No product and no company is rated or named.
- Clause text is not reproduced. The edition you buy from API or ISO governs, and the detailed test criteria of the fourth edition sit in clause 6.5 of API Spec 11D1.
- The API Monogram licensing programme, and how to read a licence number, are separate subjects not explained here.
- This page does not cover openhole isolation equipment or completion accessories beyond naming the documents that govern them: API Spec 19OH, ISO 14998 and API Spec 19AC.
- The grade allowances quoted are the published public definitions of the grades, and that limit matters: a reviewer confirming a contract requirement reads the purchased text.
Installation, setting, running and retrieval follow the manufacturer's current running procedure for the tool and the operator's programme, not this page.
The same questions this page asks of any supplier apply to the company that publishes it.
How does Maximus OIGA Private Limited answer these questions for a SpectraMax packer or bridge plug?
Maximus OIGA Private Limited builds each SpectraMax packer and bridge plug to order at its plant at Manjusar and Savli GIDC, Vadodara. Its quotation states the pressure and temperature envelope for the exact tool quoted, with the test evidence behind it. Each tool is engineered to order against your purchase order rather than resold from stock.
Each SpectraMax tool is pressure and function tested at the plant as built, and its plant pressure and function test record is issued against that tool's serial number. That plant test record covers the tool you receive, while a validation grade is backed by the design validation record for the design. Ask for both, from this manufacturer as from any other.
The element compound is quoted per tool from the bottomhole temperature and the well fluids. The choice is made from Nitrile, HNBR, HSN, Viton and Aflas, which settles the fluid question at quotation, outside the grade.
Each order ships with a documentation pack: a dimensional drawing with gauge OD and bore, a material test report traceable to heat numbers, the element compound certificate, the plant pressure and function test record, and a certificate of conformity to the purchase order, with an inspection and test plan when your QA requires one.
Lead times run in bands by product class: 1 to 4 weeks, 4 to 12 weeks, and 8 to 16 weeks or more. The quotation states the lead-time band for your build.
To get a quotation you can check, specify the document, edition and grade your specification calls for, plus the quality level. Add your casing size and weight, setting depth, setting method, differential pressure and its direction, bottomhole temperature and well fluids. Then run the ten checks above on what comes back.
Reviewers still ask a handful of questions that fall between these sections, and the answers follow.
Need expert guidance on the right solution?
Talk to our engineers about your project requirements.
What else do reviewers ask about API 11D1, ISO 14310 and V0?
What is the latest edition of API 11D1?
API Spec 11D1 is in its fourth edition, amended by Addendum 1 and Errata 1. API and authorised standards resellers sell the document, and the matching ISO document is ISO 14310, second edition, with a third edition in development.
Is a V3 packer enough, or do you need V0?
A V3 grade proves a liquid seal under axial loads across the rated temperature range. V3 does not test gas, so where the seal must hold gas the grade to specify is V1 or V0, and V0 where no gas leakage is acceptable.
Is Q1 in ISO 14310 the same as API Spec Q1?
Q1 in ISO 14310 is the most demanding of three quality-control grades for the product. API Spec Q1 is a different document: a quality management system specification for organisations that provide products to the petroleum and natural gas industry. One describes how a product is inspected; the other describes how a company runs its quality system.
Does a V0 rating mean the packer will not leak in your well?
A V0 rating means that the design showed zero bubbles during the test holds, at its tested size and conditions. Your well adds fluids, time, loads and an installation the test did not include, and the operator's barrier test after setting is what shows this tool sealed.
Does a V0 rating apply to a swellable packer?
A swellable packer is openhole isolation equipment, covered by API Spec 19OH, which sets its own validation requirements; ISO 14310 and API 11D1 do not cover it. Ask which document any grade on a swellable packer refers to. Confirm the seal in the hole the same way as for any packer, by the barrier test once it has swelled.
Every answer here is open to the same test as a supplier's claim, and the next block names who stands behind them.
Who wrote and reviewed this page, and how was it checked?
This page was prepared and reviewed by the engineering and quality team at the Manjusar and Savli GIDC plant of Maximus OIGA Private Limited, Vadodara. It was checked against the documents listed below.
- API Spec 11D1, fourth edition, with Addendum 1
- ISO 14310, second edition
- API Spec 19OH
- ISO 14998
- API Spec 19AC
The method: the documents were read by designation, edition and published scope. The grade definitions were taken from API's Addendum 1 and the public summaries of the ISO 14310 grades. The API Composite List's field and status names were used as the register writes them, and no company or product was rated.
If you find an error on this page, send a correction through the site's contact page, whether you are a reader, a supplier or a standards body. The page will be amended.
What should you do with the next V0 claim on your desk?
Take the claim through the ten checks on this page before it reaches a signature.
Run these checks on any supplier, including us.
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