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.

公开(公告)号：US20220307345A1

公开(公告)日：2022-09-29

申请号：US17655885

申请日：2022-03-22

Applicant: CONOCOPHILLIPS COMPANY

Inventor： James RUTHERFORD

IPC: E21B33/16 ,  E21B34/14 ,  E21B41/00

Abstract: The invention relates to the use of a casing or liner (3) with pre-formed, selectively openable apertures (5), in plug and abandon operations at the end of life of a hydrocarbon well. The casing or liner (3) is installed at the start of the well's life and the apertures (5) are provided over a length of the casing/liner above the reservoir where a permanent plug would normally be formed when the well is abandoned at the end of its life. Associated with the apertures are sliding sleeve closure members (6) which are designed to remain operational over the 20-30 year lifetime of the well.