Low-density hollow glass bead (HGB) fluids for wellbore drilling, completion, and workover operations
US12269986B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2022 |
| Grant date | Apr 8, 2025 |
| Priority date | — |
| Expiry date | Feb 3, 2042 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Embodiments described herein provide enhanced low-density hollow glass bead (HGB) fluids, as well as methods for utilizing such HGB fluids for wellbore drilling operations, completion operations, and workover operations. Such low-density HGB fluids include the following combination of constituents: a base oil, an oil viscosifying agent, HGBs at a concentration in a range between 20 vol % and 60 vol %, an organophilic clay, a clay activator, a surfactant, and (optionally) an H2S scavenger. Moreover, the low-density HGB fluids are suitable for use as lower-density cap fluids for pressurized mudcap drilling (PMCD) operations, alternative drilling fluids for managed pressure drilling (MPD) operations, alternative drilling fluids for conventional drilling operations corresponding to very-low-pressure or highly-depleted reservoirs, and/or lightweight fluids for wellbore workover operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.