Lost Circulation Materials

Lost circulation is the partial or complete loss of drilling fluid and/or cement slurry to the formation during drilling or cementing operations or both. This can be brought on by natural or induced causes. Natural causes include situations such as naturally fractured formations or unconsolidated zones. Induced losses occur when the hydrostatic fluid column pressure exceeds the fracture gradient of the formation and the formation pores break down enough to receive rather than resist the fluid. When lost circulation occurs, it can provoke new requirements of time and mud or cement - and add substantially to the overall cost of a well.

Typical ways to address lost circulation during cementing operations is with bridging or plugging material, the use of rapid-set or thixotropic cement, or with lightweight cement systems.

  • Reduce the slurry density (lightweight cement)
  • Add a bridging or plugging material

FracSeal™ cement is a low-density cement that can be designed to handle low-fracture-gradient wells while maintaining sufficient hydrostatic pressure to manage pore pressures effectively. It has high-viscosity and expansive forces to help with hole cleaning and displacement and superior bridging by combining lost circulation materials with inherent diverting capabilities of foam cement. FracSeal cement should be considered in situations where loss of whole fluid to the formation is anticipated. FracCem™ cement should be considered in areas where foam cement is not available.

Tuned® Light cement comprises a family of low-density conventional cements designed to increase the probability that cement will circulate up the annulus and not out to the formation. Tuned Light cement provides superior bridging by combining lost circulation material with the inherent diverting properties of microspheres. Tuned Light cements can be designed to low slurry densities enabling a reduction in the equivalent circulating density.

Additional Halliburton solutions to address lost circulation include:

Lost Circulation Materials

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Summary Summary STEELSEAL® 50 - Product Data Sheet
STEELSEAL® lost circulation material products are resilient, angular, dual-carbon based lost circulation materials.
Summary Summary STEELSEAL® 400 - Product Data Sheet
STEELSEAL® lost circulation material products are resilient, angular, dual-carbon based lost circulation materials.
Summary Summary STEELSEAL® 1000 - Product Data Sheet
STEELSEAL® lost circulation material products are resilient, angular, dual-carbon based lost circulation materials.
Summary Summary Customized Lost Circulation Treatments Help Resolve Severe Losses in Highly Fractured Geothermal Wells
Geothermal wells in Northern California are drilled in highly fractured volcanic reservoirs, where massive fluid losses can bring operations to a halt.
Summary Summary STEELSEAL® 100 - Product Data Sheet
STEELSEAL® lost circulation material products are resilient, angular, dual-carbon based lost circulation materials.
Summary Summary STEELSEAL® 25 - Product Data Sheet
STEELSEAL® lost circulation material products are resilient, angular, dual-carbon based lost circulation materials
Summary Summary Tuf Fiber™ 594 cement additive
When blended into cement slurry systems, Tuf Fiber™ 594 cement additive helps overcome lost circulation while improving wellbore strength by adding cohesiveness and increased ductility to the set cement sheath.
Summary Summary Flocele lost-circulation cement additive
Flocele™ lost-circulation cement additive helps control lost circulation.
Summary Summary BridgeMaker™ Family of LCM Spacer Fluids
The BridgeMaker™ Family of LCM spacer fluid is designed to overcome lost circulation while preparing the wellbore to receive cement. This family of spacer fluids represent an environmentally friendly blend of carefully selected materials.
Summary Summary SentinelCem Cement
SentinelCem cement is specifically designed to cure losses and enable further drilling and help achieve zonal isolation by accomplishing intended top of the cement. The solution can be easily applied to losses varying from seepage to a complete loss of returns.
Summary Summary Gilsonite Lost Circulation Additive - A4
Gilsonite additive is an asphaltene hydrocarbon in granular form. Its particle size varies between 4- and 100-mesh. Gilsonite additive is commonly used to control lost circulation.
Summary Summary Bentonite Cement Diesel Oil Slurry (BCDO)
Bentonite cement diesel oil (BCDO) slurry is a blend of bentonite and cement mixed with diesel oil. This slurry forms a thick,paste-like material when contacted by water or water-based drilling muds, making an effective lost-circulation material. Granular, flaked, or fibrous lost-circulation additives can be used with BCDO slurries.
Summary Summary Gilsonite Lost Circulation Additive
Gilsonite additive is an asphaltene hydrocarbon in granular form. Its particle size varies between 4- and 100-mesh. Gilsonite additive is commonly used to control lost circulation.
Summary Summary Flo-Chek® Service
Flo-Chek® Service consists of a two-fluid system used for sealing lost-circulation zones and squeezing off subsurface water. This process is a highly effective squeezing method that can control underground water flows and seal lostcirculation intervals. It can be used for both freshwater and brine flows.
Summary Summary Bentonite Diesel Oil Slurry (BDO)
When mixed with water-free diesel, bentonite forms a semisolid slurry (BDO) that helps seal lost-circulation zones. BDO is used during drilling when muds containing fibrous, granular, and flaked materials are ineffective.
Summary Summary Flo-Chek® A
Flo-Chek® A additive is a colorless liquid that can be used for preparing the Flo-Chek process.
Summary Summary Microblock® Cement Additive
Microblock liquid cement additive is made from a finely divided, high surface-area silica. Microblock® cement additive is a product from Elkem AS. Microblock is a registered trademark owned by Elkem AS.
Summary Summary Cementing - Lost Circulation Materials
Lost circulation is the complete or partial loss of fluid to formation(s) as a result of hydrostatic and annular pressure from natural or induced causes. Losses can add extensively to the overall well cost.
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