公开(公告)号：US10975657B2

公开(公告)日：2021-04-13

申请号：US16668841

申请日：2019-10-30

Applicant: CONOCOPHILLIPS COMPANY

Inventor： Rick D. Watts ,  Dianne Tompkins ,  Helen Haneferd ,  Lars Hovda ,  Edvard Omdal ,  Hardy Hartmann Nielsen ,  Lars Vedvik ,  Tove Husby

IPC: E21B33/13 ,  E21B36/04

Abstract: The invention relates to the decommissioning of hydrocarbon wells. It concerns the artificial promoting or inducing of creep in the overburden formation 3 surrounding an oil well 1, so that the formation rock 3 encroaches against the casing 5 to form a seal. This avoids the need to plug the annulus between the casing 5 and formation 3 with cement. The overburden may be caused to creep by reducing the pressure in the annulus, by applying heat to the overburden rock or by stressing the rock repeatedly to cause fatigue in the rock 3.

公开(公告)号：US10508515B2

公开(公告)日：2019-12-17

申请号：US15898937

申请日：2018-02-19

Applicant: CONOCOPHILLIPS COMPANY

Inventor： Rick D. Watts ,  Dianne Tompkins ,  Helen Haneferd ,  Lars Hovda ,  Edvard Omdal ,  Hardy Hartmann Nielsen ,  Lars Vedvik

IPC: E21B33/13 ,  E21B36/04

Abstract: The invention relates to the decommissioning of hydrocarbon wells. It concerns the artificial promoting or inducing of creep in the overburden formation 3 surrounding an oil well 1, so that the formation rock 3 encroaches against the casing 5 to form a seal. This avoids the need to plug the annulus between the casing 5 and formation 3 with cement. The overburden may be caused to creep by reducing the pressure in the annulus, by applying heat to the overburden rock or by stressing the rock repeatedly to cause fatigue in the rock 3.