3M™ Glass Bubbles HGS4K28 are hollow glass spheres designed for use in drilling, completion, and workover fluids, as well as cement slurries in the oil and gas industry. With a nominal density of 0.28 g/cc and an isostatic crush strength of 4,000 psi (pounds per square inch), HGS4K28 are well-suited for use in shallow to intermediate depth wells.
What are 3M Glass Bubbles?
3M™ Glass Bubbles HGS Series are engineered hollow glass spheres made from water-resistant and chemically-stable soda-lime-borosilicate glass. The use of 3M™ glass bubbles HGS series as density reducing agents in well construction applications offer the potential for reduce non-productive time, improve well integrity and productivity.
When drilling and cementing across highly depleted zones and weaker formations, low density systems are required to prevent or minimize fluid loss/lost circulation, formation damage and other problems associated with excessive overbalance conditions. Our 3M™ Glass Bubbles offer stability by maintaining target pressures with greater reliability throughout the drilling process. Minimizing the differential pressure (bottom hole pressure minus reservoir pressure) is essential for the success of any drilling operation.
3M™ Glass Bubbles HGS4K28 in Cementing
3M™ Glass Bubbles HGS4K28 added to light weight cement slurries help prevent problems associated with excessive overbalance, including reduced top of cement (TOC) and thus the need for remedial squeeze. When compared with other microspheres, cementing with HGS4K28 in shallow to intermediate depth wells offers: consistency batch-to-batch and location-to-location, greater density reduction capacity (cement slurry density values below 9.0 lb/gal (1.1 Kg/l) have been reached.)
3M Glass Bubbles HGS4K28 in Completion and Workover Fluids
The use of light weight completion and work-over fluids made with 3M glass bubbles HGS4K28 help reduce and control the bottom-hole pressure, offering the potential for reduced fluid loss and lost circulation – as well as preventing or minimizing formation damage.
3M glass bubbles HGS series are specially formulated for high strength-to-weight ratio, allowing for greater survivability under demanding downhole conditions. The durability also allows for possible reconditioning and reuse of lightweight fluid to help reduce costs; this is achieved with our 3M glass bubbles HGS4K28 – an economical product that is compatible with both water and oil based systems.