公开(公告)号：US10989041B2

公开(公告)日：2021-04-27

申请号：US15952499

申请日：2018-04-13

Applicant: CONOCOPHILLIPS COMPANY

Inventor： Stephen Cromar ,  Ian Milne

IPC: E21B47/00 ,  E21B47/005 ,  G01V1/22 ,  G01V1/52 ,  E21B33/14 ,  G01V99/00

Abstract: Systems and methods of logging in a well include utilizing a solidifying fluid, such as magnetorheological fluid, in at least one annulus surrounding a logging tool. Given production tubing may remain in the well during the logging as desired for efficiency, space between the production tubing and a casing string may form the annulus. Filling the annulus with the solidifying fluid and selective activation of the solidifying fluid to a solidified state during the logging limits interference in data collected as a result of transmitting across the annulus. Deactivation of the solidifying fluid to a liquefied state enables recovery of the solidifying fluid from the well after the logging. Embodiments employ the logging in various applications, such as assessing a cemented casing string in well abandonment operations.

公开(公告)号：US10883336B2

公开(公告)日：2021-01-05

申请号：US15211762

申请日：2016-07-15

Applicant: CONOCOPHILLIPS COMPANY

Inventor： Jean-Marie Prieur ,  Andrew Hood ,  Ian Milne ,  Stephen Cromar

IPC: E21B33/134 ,  E21B33/13 ,  E21B28/00

Abstract: A method of cementing an oil or gas well for abandonment comprises cutting the production tubing 6 above the production packer 8, setting a tubing plug 9 in the tubing and then cutting the tubing. A bridge plug may be installed at the level of the cut, which spans the full diameter of the well casing 3. An agitator assembly 20 comprising an agitator 24, packer 21 and burst sub 23, with a running tool fitted to the top, is run down the tubing on wire line. Cement is then injected into the tubing 6, which flows through the agitator assembly and causes the tubing to vibrate. The cement fills the tubing but also flows back up the A annulus between the casing and production tubing. Vibration of the tubing assists the formation of a good quality cement plug extending all around the annulus over a substantial length of the well.