公开(公告)号：US20220389301A1

公开(公告)日：2022-12-08

申请号：US17832149

申请日：2022-06-03

Applicant: CONOCOPHILLIPS COMPANY

Inventor： James RUTHERFORD ,  Roy MIDDLETON

IPC: C09K8/40

Abstract: The invention relates to the use of a sleeve (9) installed in a liner or casing (1) prior to a cementing operation. Completion equipment in the liner/casing creates an irregular inner profile which can cause cement to get trapped. A wiper dart (3) passed down the casing/liner (1) may have difficulty removing all residual cement (5). By using a sleeve or insert (8) in the liner/casing (1), a smooth inner profile (9) may be created which can be cleaned relatively easily by a wiper dart. Once cementing and cleaning are complete, the sleeve (9) may be removed by wellbore fluid or acid if it is made from a dissolvable material such as aluminum or magnesium.