No. OFMP is not API and does not certify, audit or endorse suppliers. Supplier profiles organize API certificate records that the source marks Active; confirm the certificate number, product scope and current status on the API Composite List before purchasing.

How do I check a supplier's API certificate?

Search the API Composite List by certificate number or company name and check that the status, facility address and product scope match the quotation. Read the guide

How do I contact a supplier?

Open a supplier profile. Active members can view the contact details a supplier has provided.

Standard and product names come from the API Composite List search snapshot (2026-10-10). Family groupings and Chinese reading aids are OFMP editorial additions, not official API classifications or translations. OFMP is not affiliated with API.

View all product families

Oil well cement & drilling fluid material suppliers

Standards and suppliers

Cements and Materials for Well Cementing

Oil Well Drilling Fluid Materials

Product categories

API Well Cement Class A

API Well Cement Class B

API Well Cement Class C

API Well Cement Class D

API Well Cement Class G

API Well Cement Class H

API Well Cement Class K (Annex B)

API Well Cement Class L (Annex B)

Barite 4.2 g/mL

Barite 4.1 g/mL

Hematite

Bentonite

Non-treated Bentonite

Attapulgite

Sepiolite

Technical-Grade, Low-Viscosity Carboxymethyl Cellulose (CMC-LVT)

Technical-Grade, High-Viscosity Carboxymethyl Cellulose (CMC-HVT)

Starch

OCMA-Grade Bentonite

Low-Viscosity Polyanionic Cellulose (PAC-LV)

High-Viscosity Polyanionic Cellulose (PAC-HV)

Drilling-Grade Xanthan Gum

Frequently asked questions