Remedial lost circulation treatments

The FORM-A-BLOK pill can be used in water-based or non-aqueous drilling fluids (NAF) for wellbore strengthening applications and to cure losses extending from partial to a wide range of severe lost circulation scenarios, at temperatures up to at least 350 degF [177° C]. The FORM-A-BLOK pill is designed to be used for: wellbore strengthening applications, curing partial to wide ranging severe loss situations, open hole remedial and/or preventive lost circulation squeeze, improving casing shoe integrity, and cased-hole squeeze for sealing perforations and casing leaks.

Concentration

The recommended concentration of the FORM-A-BLOK pill is 114 kg/m3 [40 lb/bbl], for fluid densities up to 16 lb/galUS [1.92 sg] in freshwater, seawater or base oil/synthetic (NAF) systems. Fluid densities of 16 lb/galUS or higher require less FORM-A-BLOK pill; 86 kg/m3 [30 lb/bbl] for water-based pills and 57 kg/m3 [20 lb/bbl] for NAF-based pills. While the FORM-A-BLOK pill can be mixed with oil- or synthetic-based fluids, mixing a water-based pill will provide the maximum strength. The slurry can be weighted with barite, calcium carbonate or heavy brine. It is recommended to continuously agitate the pill until pumped and to pull pump screens prior to pumping.