HE^® Polymer 100 dry powder is an effecient thickener for a wide variety of fluid types, including fresh water, sea water, brines and acids.  

Advantages of HE^® Polymer 100

• Hydrates rapidly in most aqueous systems
• Resists thermally induced hydrolysis
• Maintains solubility at high temperatures
• Provides excellent friction reduction
• Thickens brines of various compositions
• Improves carrying capacity of fluids
• High tolerance to changes in pH  

Powder: White, free-flowing polymer, packaged in 50-pound, multiwalled bags with 40 bags to the pallet

Useful as a thickener or friction reducer in the following brines, or mixtures:

· Fresh Water
· Seawater
· Potassium Chloride
· Sodium Chloride
· Sodium Chloride – Sodium Carbonate
· Alkali Metal Formates
· Calcium Chloride

Applications

HE^® Polymer 100 has historically been used in a wide variety of oilfield applications.  Because of its excellent friction reduction capabilities, it has been widely used in coiled tubing workover operations and in fracture acidizing.

In conformance control applications, the  HE^® Polymer 100 provides flexibility in treatment design and superior high temperature stability.  At low to intermediate temperatures, it can be readily crosslinked with chromium, aluminum and zirconium ions to produce gels for profile modification or water shutoff.  At high temperatures, it can be readily crosslinked with vcarious organic systems, including phenol-formaldehyde, resorcinol-formaldehyde, phenyl acetate- HMTA or hydroquinone-HMTA.

The HE^® Polymer 100 has been utilized as a thickener for brines in drilling and completions applications.  The HE^® Polymer 100 powder is readily dissolved in most brines, yielding rheological properties similar to that shown in (Figure 1), which describes the polymer's performance in a 10.7 ppg calcium chloride brine at 70°F.

In the very heavy brines, such as calcium bromide and zinc bromides, there may be insufficient free water to allow hydration of the dry polymer.  In those brines, the invert emulsion form of the polymer may be easier to use because the polymer is already partially hydrated.

Stability

The Composition of the HE^® Polymer 100 provides protection against thermal hydrolysis, which allows the polymer to maintain its solubility in high temperature use and to resist precipitation in the presence of multivalent cations.  In this Fann 50 test (Figure 2), the thickened calcium chloride brine was heated incrementally to 300°F.  The fluid was kept at each temperature for one hour before proceeding to the next stage.  There was very little change in viscosity during that one-hour period, which demonstrates the polymer stability at high temperatures.  Almost all of the original viscosity was regained upon cool-down, again indicating no polymer degradation, hydrolysis or loss due to precipitation.  In most high temperature applications, the polymer may benefit from the use of oxygen scavengers (e.g., sodium thiosulfate) and pH buffers (e.g., sodium bicarbonate).

Polymer Cleanup

The HE^® Polymer 100 is an inherently clean thickener, posing very little risk of formation damage under normal usage conditions. The HE^® Polymer 100 is readily soluble in normal wellbore cleanup type acids. The polymer is degradable using oxidizing agents, such as sodium hypochlorite (bleach) or ammonium persulfate. The activity of the oxidizer is generally enhanced by using fluid with a basic pH. Degradation by oxidizers is also enhanced at temperatures above 125º F.