Invention Grant
- Patent Title: Method and apparatus for filling an annulus between casing and rock in an oil or gas well
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Application No.: US15898937Application Date: 2018-02-19
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Publication No.: US10508515B2Publication Date: 2019-12-17
- Inventor: Rick D. Watts , Dianne Tompkins , Helen Haneferd , Lars Hovda , Edvard Omdal , Hardy Hartmann Nielsen , Lars Vedvik
- Applicant: CONOCOPHILLIPS COMPANY
- Applicant Address: US TX Houston
- Assignee: CONOCOPHILLIPS COMPANY
- Current Assignee: CONOCOPHILLIPS COMPANY
- Current Assignee Address: US TX Houston
- Agency: ConocoPhillips Company
- Main IPC: E21B33/13
- 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.
Public/Granted literature
- US20180171754A1 METHOD AND APPARATUS FOR FILLING AN ANNULUS BETWEEN CASING AND ROCK IN AN OIL OR GAS WELL Public/Granted day:2018-06-21
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