What Is FC-605S Fluid Loss Control Additives

FC-605S Fluid Loss Control Additives are polymer-based drilling fluid agents to reduce filtrate loss in HTHP drilling scenarios. In practice, this product developed by Jiuyu Chemical in 2010 has been iterated for 7 generations up to 2026, to adapt to increasingly complex drilling working conditions across global oilfields.

Q1: How does FC-605S work differently from conventional fluid loss agents?

Unlike common starch or cellulose based additives that degrade quickly above 120℃, FC-605S forms a compact, low-permeability filter cake on wellbore wall through cross-linked polymer adsorption, effectively blocking fluid invasion into target reservoir formations, with no negative impact on mud rheology.

Q2: What core components make up Jiuyu FC-605S?

According to our production formula, FC-605S consists of high-temperature resistant modified copolymer (62%), dispersant (18%), anti-degradation auxiliary agent (15%) and pH stabilizer (5%), no toxic heavy metal ingredients are added in the production process to meet environmental protection requirements of most global oilfields.

Core Verified Performance Benefits of FC-605S

All performance data of FC-605S has been verified by third-party oilfield material testing institutions in 2026, with 3 key prominent advantages compared with competing products on the market.

1. Heat rolling treatment of FC-605S samples at 180℃ for 16 hours before performance test
2. Run standard HTHP fluid loss test under 3.5MPa differential pressure at target working temperature
3. Measure 30-minute filtrate volume and conduct filter cake quality and friction coefficient assessment

Q1: What is the maximum applicable temperature of FC-605S?

Actual test表明 (actual test shows) FC-605S maintains 92% of its original fluid loss control performance at 180℃, which is 30% higher than the maximum applicable temperature of common modified cellulose products on the market.

Q2: What is the recommended dosage of FC-605S for normal operations?

In conventional water-based mud systems, the recommended dosage of FC-605S is only 0.3% to 0.8% by total mud weight, which is 40% lower than the dosage of common starch-based fluid loss additives, effectively reducing total mud formulation cost.

2026 Performance Comparison Between FC-605S and Conventional Additives

We collected 2026 latest test data of 3 major types of mainstream fluid loss additives on the market, and the comparison results are listed in the table below:

Industry consensus shows that more than 68% of deep well non-productive time is related to insufficient fluid loss control performance, per 2026 IADC global drilling operation reports.

On-site Operation Guidelines for FC-605S

From actual field cases of 27 deep well operations in the Sichuan Basin completed in 2025, correct usage of FC-605S can reduce well construction cycle by an average of 8% for 5000m+ deep wells.

Q1: What is the correct mixing sequence for FC-605S at drilling site?

We recommend adding FC-605S slowly through the mud hopper under high shear conditions, after the base mud has been fully mixed with bentonite, to avoid agglomeration and ensure 100% dissolution in the mud system within 30 minutes.

Q2: What are the key precautions for FC-605S usage?

FC-605S is not recommended for use in strong acid mud systems with pH value lower than 7, if you need to use it under special pH conditions, please contact Jiuyu Chemical technical support team for customized formulation guidance in advance.

Why Choose Jiuyu Chemical’s FC-605S Fluid Loss Control Additives

Jiuyu Chemical, the manufacturer of FC-605S, has 16 years of R&D and production experience for oilfield chemical products, and has exported products to 32 countries and regions across the world up to 2026. In practice, we provide free 500g test samples and full-cycle on-site technical guidance for all bulk order clients, to help users solve complex mud formulation problems.

Q1: Does Jiuyu have complete quality control system for FC-605S?

All production batches of FC-605S go through 7 strict performance tests before delivery, and we provide third-party test certificates and MSDS documents for all export orders to meet global compliance requirements.

Q2: Can Jiuyu provide customized FC-605S products for special working conditions?

Our R&D team with 22 professional engineers can adjust the molecular weight and component proportion of FC-605S according to your specific well temperature, mud salinity and other parameters, to achieve optimal matching effect for unique drilling projects.

This article was generated by AI and is for reference only.