Latex-based fluid loss control sealant
Seals low-permeability, microfractured formations in shale gas and unconventional plays.
The ULTRADRIL water-based drilling fluid system has a proven industry track record as the standard in high-performance, ultrainhibitive water-based drilling fluids for environmentally sensitive areas on and offshore including highly reactive shales. A deepwater alternative, the ULTRADRIL system optimizes inhibition and helps reduce costs and expedite drilling.
The ULTRADRIL system has an inhibitive capability closely matching that of nonaqueous drilling fluids. Its triple-inhibition approach deters the most reactive shales and provides superb wellbore stability, preventing sloughing and swelling that can cause stuck pipe and washouts. The system encapsulates cuttings with a thin polymer coating that virtually eliminates shale dispersion, reducing the need for dilution and disposal of large fluid volumes. The ULTRADRIL system also coats the bit, BHA, and drill pipe with an accretion-inhibitive coating that keeps the cutting structure clean and effective, resulting in less bit balling and higher ROP.
The ULTRADRIL system has successfully drilled long sections of highly reactive gumbo shales and graded out very high in stability, inhibition, screenability, and maintenance. The system’s low moisture content results in drier, firmer drilled cuttings. In sections typically drilled with CaCl2 or 20% NaCl/PHPA water-based fluids, the ULTRADRIL system has eliminated shaker screen binding, rapid encapsulator depletion, and excessively high dilution rates.
ULTRAHIB shale inhibitor can be added directly to the mud system with no effect on viscosity or filtration properties.
ULTRACAP PLUS encapsulator is a low-molecular-weight, dry acrylic acid copolymer designed to provide cuttings encapsulation and clay dispersion inhibition
19% time savings achieved and two ROP records across Schlumberger operations set using the PowerDrive Xceed RSS in a 16-in hole.
The well was displaced to the Ultradril system with 3% v/v Poroseal additive as programmed. The 8 1/2-in. interval was drilled through the Nahr Umr shale interval with after the mud weight was increased from 10.5 to 11.0 lb/gal (1.26-1.32 SG).