High Temperature Tolerance CMC & PAC

Zibo Hondo Chemical Co., Ltd. is one of the most experienced manufacturers and suppliers of high temperature tolerance cmc & pac in China. Our factory offer high quality products made in China with competitive price. If you have any enquiry about quotation, please feel free to email us.

High Temperature Tolerance CMC & PAC for oilfields is a specially modified cellulose derivative designed to cope with the extremely high temperature environment in oil production. In high temperature and high pressure downhole operations, conventional water-soluble polymers are prone to degradation and failure, while high temperature tolerance CMC & PAC has significantly improved thermal stability, salt resistance and rheological properties through molecular structure optimization and process improvement. The high temperature tolerance CMC & PAC is becoming a key additive for oilfield working fluid systems such as drilling fluids and fracturing fluids.These high-temperature-resistant cellulose polymers have been widely validated in deep-well and geothermal drilling, showing stable viscosity retention above 180–200°C and providing lower filtration loss compared with conventional CMC. Their enhanced salt tolerance also supports reliable performance in high-salinity reservoirs, making them essential for modern HPHT (high-pressure high-temperature) oilfield operations.

• 1. High temperature tolerance CMC & PAC used in high-temperature deep-well drilling fluid

  In deep formations (such as shale gas and geothermal wells), High temperature tolerance CMC & PAC is compounded with sulfonated phenolic resins, polysulfonates, etc. to maintain the rheological stability of drilling fluids and prevent high-temperature gelation or dilution.By forming a thermally resistant polymer network, HT-CMC/PAC reduces irreversible viscosity loss and mitigates flocculation with divalent cations. Bench tests following API RP 13B-1 style protocols show improved filtration control and stable yield point at elevated temperatures, supporting safer drilling in HT formations.

• 2. High temperature tolerance CMC & PAC used in fracturing fluid system

  As a thickener for linear gel or cross-linked fracturing fluid, High temperature tolerance CMC & PAC delays gel breaking time in 200°C formations and improves proppant laying efficiency. In unconventional reservoir stimulation (shale, tight gas), HT-CMC/PAC enhances proppant transport and reduces thermal degradation during downhole heating. Field simulations indicate better proppant placement uniformity when HT-CMC/PAC is used as a co-thickener with guar or synthetic gums. Keywords: high-temperature fracturing fluid, proppant transport, thermal stable thickener.

• 3. High temperature tolerance CMC & PAC used in cementing slurry

  The high temperature tolerance CMC & PAC adjusts the thickening time of cement slurry, reduces free water precipitation at high temperature, and enhances the compressive strength of cement stone.Laboratory cementing tests demonstrate reduced free water and improved early compressive strength in cement cores treated with HT-CMC/PAC blends. This contributes to improved zonal isolation and long-term well integrity under HT conditions.

• 4. High temperature tolerance CMC & PAC used in water plugging and profile control

  In high-temperature and high-salt reservoirs, High temperature tolerance CMC & PAC is compounded with polymer gel to selectively plug high-permeability layers and improve oil recovery efficiency.HT-CMC/PAC forms a reinforced gel matrix with crosslinkers, offering higher thermal endurance compared with conventional HPAM systems; this enhances profile control and reduces water cut in pilot flood tests.

• 5. High temperature tolerance CMC & PAC used in geothermal well development

  In geothermal wells above 200°C, Ultra-high temperature resistant CMC is compounded with high-temperature resistant polymers (such as polyetheramine) to form a thermally stable gel system, which effectively prevents well wall collapse.For geothermal and super-critical applications, HT-CMC/PAC blends are subjected to accelerated thermal aging and mechanical shear tests to confirm network integrity; data supports their use in wells exceeding 200°C when formulated with suitable high-temperature co-polymers.

 

Application Solutions for CMC/PAC In Oil drilling industry

 

 

HTHP drilling solution: Customized CMC/PAC blending to meet filtration loss <10 mL under 200°C.

 

Geothermal well stability:

Combines high-temp CMC with sulfonated asphalt and SMP for enhanced borehole support.

 

High-salt reservoir compatibility

Anti-calcium formulation prevents Ca²⁺/Mg²⁺ flocculation.

 

Cementing anti-collapse package

Designed for long-cycle cementing at elevated temperatures.

• High temperature tolerance CMC & PAC's rheological regulation function: It could form a network structure in the drilling fluid, control viscosity, ensure suspension of cuttings and clean wellbore.This rheology control is achieved through a tailored molecular weight distribution and controlled degree of substitution (DS), enabling predictable shear-thinning behavior beneficial for both circulation and cuttings transport.

 

• High temperature tolerance CMC & PAC act as filtrate reducer: It could form a dense filter cake on the well wall, then reduce water infiltration into the formation, and prevent well wall instability.API filtration and HPHT fluid loss tests confirm that HT-CMC/PAC reduces filtrate volumes and forms low-permeability filter cakes under high temperature conditions, minimizing invasion and formation damage.

 

 

• High temperature tolerance CMC & PAC's Lubrication and sand carrying function: Its solution could reduce the friction resistance of the drill bit and improve the proppant carrying capacity of the fracturing fluid.Lower torque and drag in directional drilling cases have been observed where HT-CMC/PAC was used to enhance lubricity; proppant transport efficiency improves due to optimized viscoelastic response at downhole shear rates.

1. Solve the high temperature failure mechanism

High temperature tolerance CMC & PAC is prone to molecular chain breakage and substituent shedding at >120°C, resulting in a sudden drop in solution viscosity and increased filtration loss. High temperature may also trigger flocculation reactions with high-valent metal ions (Ca²⁺, Mg²⁺) in the formation. The ultra-high temperature resistant CMC could well solve the above issue. As its improvement on the molecular chain, it could keep a stable on viscosity under the high temperature environment. It could have a better performance on the filtration loss ability in the deep well and high temperature drilling.Through DS optimization (e.g. DS≥1.0 for selected grades), light crosslinking and molecular-weight tailoring, HT-CMC/PAC retains viscosity and filtration control at temperatures >120°C. Internal HT aging data indicates viscosity retention typically >75–85% after specified aging protocols, evidencing improved thermal resistance versus conventional grades.

2. Modification technology

Optimization of degree of substitution for ultra-high temperature resistant CMC: Increase the degree of carboxymethyl substitution (DS≥1.0) for the high temperature tolerance CMC & PAC, enhance the rigidity of the molecular chain, and reduce high-temperature disentanglement.

Crosslinking modification: Introduce a lightly crosslinked structure (such as epichlorohydrin crosslinking) to form a three-dimensional network to resist thermal degradation.

Molecular weight control for the Ultra-high temperature resistant CMC: Adjust the molecular weight distribution through oxidative degradation or enzymatic pretreatment to balance high-temperature viscosity and solubility. With this coordinate, improve the performance for the high temperature tolerance CMC.Our manufacturing control includes batch COA reporting of DS, viscosity, moisture and HT aging performance; traceable production records and pilot HT test data are available to qualified engineering buyers upon request.

Standardized, controlled, and trustworthy

• Raw Material Control: Only select high-purity cellulose with controlled ash and fiber content to ensure consistent molecular substitution.
• Production Process Control: Automated reaction monitoring ensures stable DS (0.9–1.2) and uniform polymer distribution.
• In-Process Testing: Viscosity, pH, moisture, substitution uniformity, and filtration-loss performance are tested every batch.
• Pre-Shipment Quality Assurance: COA provided with every shipment; third-party SGS/Intertek testing available on request.

Why Choose Us

 

 

• 15+ years of experience in cellulose chemistry and oilfield additives
• Stable supply capacity with professional export support
• Customizable viscosity levels & high-temperature performance parameters
• Full technical documents: COA, MSDS, TDS, API test results
• Professional technical support for HTHP drilling and geothermal fields

High temperature tolerance CMC & PAC has solved the performance bottleneck of traditional cellulose derivatives in high temperature oil field environment through molecular structure optimization and composite modification, and the high temperature tolerance CMC & PAC has become an important auxiliary agent in deep well, ultra-deep well and unconventional oil and gas production. Its development is closely centered on the extreme conditions of oil field operations, and will further evolve towards multifunctionality and intelligence in the future.

Q1: What is the maximum temperature your CMC/PAC can withstand?
Our upgraded high-temperature CMC & PAC maintains functionality up to 200°C, depending on formulation.

Q2: Is it compatible with brine, CaCl₂, or high-salt drilling fluids?
Yes. The product is designed with anti-calcium mechanisms to prevent flocculation or viscosity loss.

Q3: Can this product replace standard PAC/CMC?
In high-temperature wells → Yes, strongly recommended
In low-temperature wells → Standard PAC/CMC may be sufficient

Q4: Can you provide technical testing support?
Yes, we offer HTHP tests, aging tests, and compatibility evaluations.

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