Schlumberger

RHADIANT Drilling Fluid System

Produce ultra-high temperature wells faster

The RHADIANT drilling fluid system is formulated to maintain stability throughout the construction and evaluation of ultra-high temperature wells with bottomhole static temperatures (BHST) of greater than 500° F (260° C). The system will maintain stable rheological profiles with all the characteristics needed to deliver cost-effective drilling rates in thermally hostile downhole environments.

Log, case and cement wells efficiently during ultra-high temperature drilling

Unlike conventional non-aqueous drilling fluids, the RHADIANT fluid system maintains extreme-temperature stability even during prolonged static conditions. Stable rheologies in tandem with ultra-thin and slick filter cake deposits facilitate efficient logging, casing and cementing operations. Additionally, the fluid system effectively protects downhole tools while optimizing operations, enabling accurate perforation placement, optimized completions and high-quality reservoir characterization.

Eliminate typical ultra-high temperature drilling challenges

The RHADIANT fluid system minimizes lost circulation, excessive equivalent circulating densities (ECD), stuck pipe, ballooning, well control and other issues typically associated with drilling deep and ultra-high temperature wells. It also resists acid gas contamination and maintains stability during prolonged static periods of tripping, logging and cementing. The low, non-progressive gel structure, excellent high-pressure, high-temperature (HPHT) filtration control and superb filter cake quality of the RHADIANT fluid system combine to deliver a wellbore ideally conditioned for openhole logging and prospect evaluation.

Easily build the system to meet your needs with simple 3-component system

The RHADIANT non-aqueous fluid system is both easy to build and maintain with only three components:

  • MUL XT emulsifier is the emulsifier for the RHADIANT fluid package. It significantly contributes to the system's extremely low HPHT fluid loss values and contains no nitrogen-base compounds that can break down at elevated temperatures and release harmful ammonia.
  • The ONETROL HT fluid loss control agent maintains stability at 500° F BHST with negligible effect on the rheological properties of the drilling fluid.
  • The ECOTROL HT component is a secondary fluid loss control agent that, like its primary counterpart, retains stability in extreme temperature environments.

The RHADIANT system performs equally well with various paraffin-base fluid chemistries, providing the flexibility to formulate a system tailored to meet specific downhole and environmental demands.

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Produce Wells Faster with Ultra-High Temperature Nonaqueous Drilling Fluid

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RHADIANT Drilling Fluid Performed Beyond Expectations

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Seven openhole wireline logging runs were performed with minimal issues for over 90 hrs of static condition and no drilling or lost circulation problems were encountered and drilling performance was up to the expectations.
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