公开(公告)号：US20210222052A1

公开(公告)日：2021-07-22

申请号：US16748339

申请日：2020-01-21

Applicant: King Fahd University of Petroleum and Minerals

Inventor： Muhammad Shahzad KAMAL ,  S.M. Shakil HUSSAIN ,  Mobeen MURTAZA ,  Mohamed MAHMOUD

IPC: C09K8/60

Abstract: Amidoamine-based gemini surfactants having dual chains connected via an arylene or heteroarylene linker. Each chain contains a quaternary ammonium head group and an ethoxylated alkyl tail. A water-based drilling fluid containing the gemini surfactant is also provided. As examined by linear swelling and free swelling tests, the gemini surfactant is effective in reducing clay swelling.

公开(公告)号：US20210238472A1

公开(公告)日：2021-08-05

申请号：US16777221

申请日：2020-01-30

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Muhammad Shahzad KAMAL ,  S.M. Shakil HUSSAIN ,  Mobeen MURTAZA ,  Mohamed MAHMOUD

IPC: C09K8/60 ,  C07C235/10 ,  C09K8/86

Abstract: Methods of controlling clay swelling and stabilizing subterranean geological formations containing swellable clays (e.g., montmorillonite, bentonite) are described. The methods involve treating the swellable clays with a composition containing an amidoamine-based gemini surfactant. The gemini surfactant has dual chains connected via an alkylene linker, whereby each chain contains a quaternary ammonium head group and an ethoxylated alkyl tail. As examined by linear swelling and free swelling tests, use of the gemini surfactant is effective in reducing swelling of the clays.