scope:

FOREWORD

a. This specification is under the jurisdiction of the API Committee on Standardization of Drilling Fluid Materials.

b. The purpose of this specification is to provide standards for materials used in oil well drilling fluids. The materials covered are barite, hematite, bentonite, nontreated bentonite, OCMA grade bentonite, attapulgite, sepiolite, technical-grade low viscosity carboxymethylcellulose (CMC), technical-grade high viscosity carboxymethylcellulose (CMC), and starch.

c. Reference is made herein to API RP 13B-1: Standard Procedure for Field Testing of Water-Based Drilling Fluids, which is also under the jurisdiction of the Committee on Standardization of Drilling Fluid Materials.

d. Additional publications under jurisdiction of this committee are:

RP 13B-1 Recommended Practice for Standard Procedure for Field Testing Water-Based Drilling Fluids

RP 13B-2 Recommended Practice for Standard Procedure for Field Testing Oil-Based Drilling Fluids

Bul 13C Bulletin on Drilling Fluids Processing Equipment

Bul 13D Bulletin on the Rheology of Oil Well Drilling Fluids

RP 13E Recommended Practice for Shale Shaker Screen Cloth Designation

RP 13G Recommended Practice for Drilling Mud Report Form

RP 13I Recommended Practice for Laboratory Testing of Drilling Fluids

RP 13J Recommended Practice for Testing Heavy Brines

RP 13K Recommended Practice for Chemical Analysis of Barite

e. Manufactures interested in obtaining a monogram license for these materials should either write the API Dallas office at 2535 One Main Place, Dallas, Texas 75202 for an application package or purchase a copy of the Composite List of Manufacturers Licensed for Use of the API Monogram, Order No. 811-00005.