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：US10731439B2

公开(公告)日：2020-08-04

申请号：US15919473

申请日：2018-03-13

Applicant: CONOCOPHILLIPS COMPANY

Inventor： Ian Milne ,  Alistair Bone

IPC: E21B37/00 ,  E21B34/06 ,  E21B33/12 ,  E21B43/08 ,  E21B43/10 ,  E21B43/04

Abstract: The invention relates to a method and apparatus for avoiding fluid loss during installation of a lower completion in an open hole oil, gas or water well. A lower completion assembly 3, 33 comprising tubing with production perforations, for example in a sand screen, is run into the well on drill pipe 8, 38. The lower completion 3, 33 is hung from a packer 4, 34, together with a wash pipe 9, 39 which extends through the inner of the lower completion 3, 33. At the proximal end of the lower completion is a seal 15, 45 through which the wash pipe 9, 39 extends. An aggressive breaker fluid is circulated through the wash pipe, through a float shoe 11, 41 at the end of the completion. Once circulation is completed, the aggressive breaker removes all filter cake from the formation in 30 minutes. The wash pipe 9 is withdrawn but, because the wash pipe 9 seals against the seal 14 as it is withdrawn, fluid is not lost into the formation via the lower completion. The wash pipe 9 is made from flush jointed tubing which allows the seal to be uninterrupted as the wash pipe is withdrawn.

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.