Small quantitites provide viscosity and weight material suspension in WBM.
Form-A-Jel plugging agent serves to cure losses where cement plugs and conventional particulate lost circulation material (LCM) aren’t viable options due to bottomhole assembly (BHA) size limitations, performance, or time constraints. The agent can reduce rig time by being pumped through most conventional BHAs to eliminate tripping. The crosslinking begins immediately after nozzle shear to minimize wait time that would be required for cement plugs. The rapid set time ensures the pill solidifies inside the formation, but near the wellbore.
The agent is shipped in kits with all the necessary products to mix 40 bbl [6.36 m3], except for the nonaqueous base fluid and water. A mixing pit with a low-shear paddle mixer or cement batch mixer is required on location to prepare Form-A-Jel agent.
The pill contains oil and water with a proprietary emulsifier, lime, and a blend of viscosifiers that crosslink after shear activation. The pill can be formulated with either diesel or mineral oil depending on availability, local regulations, and exposure to aquifers.
Form-A-Jel agent has a stringent mixing order and rate of addition that must be observed. Mixing, pumping procedures, and placement guidelines for Form-A-Jel agent must be obtained from the online support and knowledge management system during the planning stages. Tanks and lines must be clean and free of any trace of water prior to mixing. It’s highly recommended that 5-bbl [0.8-m3] spacer fluid be pumped before and after the Form-A-Jel agent pill. The spacer should consist of a viscous DUO-VIS biopolymer viscosifier slurry at 2 lb/bbl [5.7 kg/m3] mixed into freshwater with a funnel viscosity greater than 45 s.
Prejob testing to confirm shear activation must be completed prior to pumping Form-A-Jel agent to ensure downhole activation once the pill has exited the bit. This consists of a low-shear stability test and high-shear activation test.
Bioassay information is available upon request. Form-A-Jel agent should be treated as an oil-based drilling fluid for waste management and spillage or contaminant purposes. Local waste management requirements for disposing of drilling fluids based on diesel or mineral oil or both and contaminated solids should be followed. Handle as an industrial chemical, wearing protective equipment and observing the precautions as described in the Safety Data Sheet.
Form-A-Jel agent is shipped in 40-bbl [6.36-m3] kits. Each kit is palletized in accordance with packaging guidelines. Store in a dry location away from sources of heat or ignition.