Lost Circulation Materials | SLB

Lost Circulation Materials

Control downhole losses of drilling fluids

Fluids texture
Fluids texture

M-I SWACO offers the industry’s most extensive line of lost circulation materials (LCMs) engineered specifically to seal costly loss zones. Our comprehensive suite of LCMs includes an engineered approach to the design and application of plugs and bridging agents. Our lost circulation technologies include proprietary engineering software to determine the optimal particle size distribution of bridging materials.

We provide basic LCMs ranging from flakes and fibers to specially engineered families of crosslinking polymers designed to plug large fractures or vugular zones. Additionally, our thermally activated gelling agents generate viscosity and develop a gel structure once bottomhole temperature exceeds 140 degF [60 degC].


  • FybeCarb - promo card
    High-efficiency, acid-soluble loss-prevention and remedial material

    Seal fracture apertures of up to 1,000 um. View link button arrow

  • M-I Seal Product Sheet
    M-I SEAL
    Lost-circulation materials

    Effective when drilling highly porous fractured or vugular matrix formations. View link button arrow

  • M-I-X II Product Sheet
    M-I-X II
    Ground cellulose plugging agent

    Bridge and seal permeable formations in water-, oil-, or synthetic-based mud systems. View link button arrow

  • Lost Circulation Material - promo card
    Lost circulation materials

    Lost circulation for all types and densities of fluid systems. View link button arrow

  • Vinseal Product Sheet
    Filtration control and electrical stability lost circulation material

    Bridges and seals permeable formations with minimal effect on electrical stability. View link button arrow


  • Drilling Fluids
    High-performance, high-strength lost circulation pill

    Cure losses, from partial to severe, at temperatures up to 350 degF [177 degC]. View link button arrow

  • Form-A-Blok AS Pill  Product Sheet
    Acid-soluble lost circulation pill

    Wellbore strengthening across a host of lost circulation scenarios. View link button arrow

  • DEEPCLEAN displacement solvent in pipe
    High-solids slurry

    Prevent lost circulation in fractures, vugular formations, matrix, and underground blowout events. View link button arrow