公开(公告)号：US20240228857A9

公开(公告)日：2024-07-11

申请号：US18547993

申请日：2022-02-03

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Glenn PENNY ,  Vishwas GUPTA ,  Sai Sashankh RAO ,  Nicklay M. KOSTOV ,  Qian WU

IPC: C09K8/32 ,  C09K8/03 ,  E21B21/08

CPC classification number: C09K8/32 ,  C09K8/032 ,  E21B21/08

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.

公开(公告)号：US20240132769A1

公开(公告)日：2024-04-25

申请号：US18547993

申请日：2022-02-03

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Glenn PENNY ,  Vishwas GUPTA ,  Sai Sashankh RAO ,  Nicklay M. KOSTOV ,  Qian WU

IPC: C09K8/32 ,  C09K8/03 ,  E21B21/08

CPC classification number: C09K8/32 ,  C09K8/032 ,  E21B21/08

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.