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US 12,742,364 B2Granted
Method of sealing a well with multiple annuli
AssigneeSchlumberger Technology Corporation
InventorsDavid Engel, Dustin Cavin
Life of this patent
Estimating the term…
Abstract
Described herein are systems and methods for sealing a well with multiple annuli. In an example, a downhole assembly can be lowered into a cavity of a production tube. Openings can be created in the production tube and an inner casing. The downhole assembly can create a seal between the production tube and the inner casing that allows barrier fluid to freely flow into an outer annular gap between the inner casing and an outer casing. A barrier fluid can be injected such that the barrier fluid flows through the radial openings into the outer annular gap.
Claims20
A method for sealing a well, comprising:
- creating a first seal between an outer surface of a production tube and an inner surface of a first casing of the well, the production tube being nested inside the first casing and the first casing being nested inside a second casing, wherein creating the first seal comprises radially expanding the production tube;
- creating a first radial opening in the production tube, the first radial opening having a greater downhole depth differential than the first seal;
- creating a second radial opening in the first casing;
- creating a second seal between a barrier fluid injector and an inner surface of the production tube;
- and
- injecting a barrier fluid into an internal cavity of the production tube, wherein
- injecting the barrier fluid causes the barrier fluid to flow through the first radial opening into a first annular gap between the production tube and the first casing,
- the first seal prevents the barrier fluid from flowing in an upward direction within the first annular gap, and
- injecting the barrier fluid causes the barrier fluid to flow through the second radial opening into a second annular gap between the first casing and the second casing.
6 more elements
A method for sealing a well, comprising:
- creating a first seal between an outer surface of a production tube and an inner surface of a first casing of the well, the production tube being nested inside the first casing and the first casing being nested inside a second casing;
- creating a first radial opening in the production tube, the first radial opening having a greater downhole depth differential than the first seal;
- creating a second radial opening in the first casing;
- creating a second seal between a barrier fluid injector and an inner surface of the production tube;
- and
- injecting a barrier fluid into an internal cavity of the production tube, wherein
- injecting the barrier fluid causes the barrier fluid to flow through the first radial opening into a first annular gap between the production tube and the first casing,
- the first seal prevents the barrier fluid from flowing in an upward direction within the first annular gap, and
- injecting the barrier fluid causes the barrier fluid to flow through the second radial opening into a second annular gap between the first casing and the second casing;
- wherein creating the first seal comprises:
- initiating a firing sequence of a perforating gun to create a third radial opening in the production tube;
- and
- injecting a material through the third radial opening to solidify inside the first annular gap.
10 more elements
A method for sealing a well, comprising:
- creating a first seal between an outer surface of a production tube and an inner surface of a first casing of the well, the production tube being nested inside the first casing and the first casing being nested inside a second casing;
- creating a first radial opening in the production tube, the first radial opening having a greater downhole depth differential than the first seal;
- creating a second radial opening in the first casing, wherein the first radial opening and the second radial opening are created simultaneously;
- creating a second seal between a barrier fluid injector and an inner surface of the production tube;
- and
- injecting a barrier fluid into an internal cavity of the production tube, wherein
- injecting the barrier fluid causes the barrier fluid to flow through the first radial opening into a first annular gap between the production tube and the first casing,
- the first seal prevents the barrier fluid from flowing in an upward direction within the first annular gap, and
- injecting the barrier fluid causes the barrier fluid to flow through the second radial opening into a second annular gap between the first casing and the second casing.
6 more elements
Dependencies are inferred from the claim text.