Lost Circulation Materials

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].


FORM-A-BLOK AS acid-soluble lost-circulation pill

This pill is designed for wellbore-strengthening applications and a wide variety of lost circulation scenarios, including fractures and matrix permeability.


FybeCarb high-efficiency, acid-soluble, single-sack loss-prevention and remedial material

This material helps prevent and cure lost circulation events with a lower load of materials compared with conventional blends.


G-SEAL sized graphite bridging agent

This suite of bridging agents bridges and seals permeable and fractured formations to control seepage losses and reduce the risk of differential sticking.


OPTISEAL wellbore strengthening material blend

These blends can plug fracture apertures of up to 1,200 um and provide good fluid loss control in moderate- to high-permeability formations.


C-SEAL fluid loss control system

This effective, economical fluid loss control system reduces bridging and plugging when drilling and can control seepage to partial to severe lost-circulation zones.


FORM-A-SET polymeric lost circulation control material

This suite of material is designed to plug matrix and fracture zones.


M-I SEAL lost circulation material

Effective when drilling fractured or vugular highly porous matrix formations, this all-purpose LCM reduces severe lost circulation and minor seepage losses.


M-I-X II ground cellulose plugging agent

Particularly useful for preventing differentially stuck pipe when drilling depleted zones, this LCM is available in fine, medium, and coarse grades for optimal particle-size selection.


SAFE-CARB ground marble bridging agent

Available in a range of grind sizes, this high-purity, acid-soluble calcium carbonate offers multiple advantages over conventional limestone bridging agents.


VERSAPAC thermally activated organic thixotropic LCM

This highly efficient product delivers maximum formation stability with minimal viscosity increase.


VINSEAL filtration control and electrical stability LCM

This LCM is available in fine, medium, and coarse grades.


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