公开(公告)号：US20240026205A1

公开(公告)日：2024-01-25

申请号：US18255424

申请日：2021-12-03

Applicant: AKITA UNIVERSITY ,  KANEKA CORPORATION

Inventor： Shigemi NAGANAWA ,  Ryutaro MUKAI

IPC: C09K8/20 ,  C09K8/035 ,  C09K8/03 ,  E21B21/00

CPC classification number: C09K8/206 ,  C09K8/035 ,  C09K8/032 ,  E21B21/003 ,  C09K2208/08

Abstract: The present invention is directed to a drilling fluid containing water, biodegradable fibers, and a thickener. The thickener contains a water-absorbing silicate, and the biodegradable fibers have a fiber length of 5.0 to 50 mm.

公开(公告)号：US20220228048A1

公开(公告)日：2022-07-21

申请号：US17614807

申请日：2020-06-04

Applicant: AKITA UNIVERSITY ,  KANEKA CORPORATION

Inventor： Shigemi NAGANAWA ,  Ryutaro MUKAI

IPC: C09K8/035 ,  C09K8/12 ,  C09K8/52

Abstract: An object of the present invention is to provide an environmentally friendly drilling fluid that has excellent cuttings transport capability and excellent hole cleaning capability. A drilling fluid according to the present disclosure is a drilling fluid containing water, biodegradable fibers, and a thickener. The thickener contains a biodegradable polysaccharide. The content of the biodegradable polysaccharide in the drilling fluid is greater than or equal to 0.01 g/L and less than or equal to 5 g/L.