API Specification 13A-18 1.1
PAC-HV, also referred to as API PAC regular grade, is a water-soluble polymer produced only from cellulose chemically reacted with carboxy-methyl (anionic)groups. The product obtained is further purified to significantly increase the active polymer content.
The product is a free-flowing and/or granular powder. See Table 17 for physical requirements.
API Specification 13A-18.1.2
PAC-HV is widely used in water-based drilling fuid for a variety of applications, such as filtration control, viscosity and shale inhibition. Although field use can vary, this procedure focuses on filtration-control and viscosity-control characteristics.
Product Physical: API Specification 13A - 18.1.7
Requirements: To obtain the best handling in the field, it is recommended that the particle size for the PAC-HV powder be u 0.8mm(u 20 mesh)
Technical Requirements: API Specification 13A-18.1.1
Product Rejection: It shall not contain any other polysaccharides, such as starch, guar or other naturally occurring polymers or their derivatives.
API Specification 13A-18.1.4
PAC-HV shall be free of any foreign polymer. Therefore, a qualitative starch determination shall be performe before performance tests. If starch is found, no further should be performed and the sample shall be rejected.
Table 17- PAC-HV physical requirements
Presence of starch or starch derivatives Absent
Moisture content Maximum 10%
Apparent viscosity Minimum 50 cP
API filtrate volume Maximum 23ml
Note: General Shipping & Marking Requirement are listed in the General Requirements Section of this Purchasing Guideline.