Ground marble bridging agent
High-purity, acid-soluble calcium carbonate used as a bridging and weighting agent in drilling, drill-in, workover, and completion fluids.
G-SEAL bridging agent is a coarse-sized plugging agent used in water-, oil- or synthetic-based drilling fluids to bridge and seal permeable and fractured formations.
When drilling depleted zones exposed to high differential pressures, the bridging and plugging capabilities of G-SEAL bridging agent can reduce the potential for stuck pipe. G-SEAL bridging agent is chemically inert and thermally stable and will not affect rheological properties when used at recommended concentrations. It can lower the potential for lost circulation and reduce torque and drag in many drilling applications.
|Typical Physical Properties|
|Physical appearance||Dark gray to black powder|
|Solubility in water at 68 degF [20 degC]||Insoluble|
|Median particle size (d50)†||300–350 um|
† Median particle size is reported as a range because of variations in the manufacturing and grinding process. If a precise size distribution of a product is critical to a drilling operation, it should be measured with the appropriate recommended test procedure using samples that are representative of those expected to be used in that operation. Nominal d10 and d90 values are available upon request.
Bioassay information is available upon request. Handle as an industrial chemical, wearing protective equipment and observing the precautions described in the safety data sheet.
G-SEAL bridging agent is packaged in 55-lbm [25-kg] multiwall paper sacks. Store in a dry, well-ventilated area. Keep container closed. Follow safe warehousing practices regarding palletizing, banding, shrink-wrapping, and stacking.
Pumping Grande-Seal particulates pills in combination with standard LCM proved to be effective in controlling losses.
The shale shakers and the recovery system worked, with limited plugging of equipment and a greatly reduced LCM usage.
Used in water-, oil- or synthetic-based drilling fluids to bridge and seal permeable and fractured formations.
All offset wells drilled in this area of the Taranaki basin had experienced problems coming out of the hole after trouble-free drilling of the 12¼-in. section.