An inflating container filled with formation plugging fluid is deployed at the target zone by a rigless apparatus. The inflating container can be in valved fluid communication with an explosive filled container, the explosive being ignited using a firing mechanism that is attached to the explosive filled container. The explosion expands gases in the explosive filled container which pass into the inflation container and displace the formation plugging fluid into the balloon sections and through the weakened portions of the central balloon to penetrate the walls of the target zone. The expanded central balloon is melted by the heat of the chemical reaction and a portion adheres to the formation wall thereby sealing the undesirable target zone; thereafter, the remaining balloon sections are deflated or ruptured to permit the apparatus to be withdrawn through the production tubing.

An apparatus for sealing a section of a wall of a wellbore adjoining a target zone containing undesirable fluids for preventing penetration of the undesirable fluids into the wellbore is described. The apparatus includes an inflatable balloon deployable in the wellbore, a coiled tubing for deploying the inflatable balloon into the wellbore and an inflating assembly tool for inflating the balloon to form a seal over the adjacent target zone of the well bore wall.

The present invention relates to an annular barrier for being expanded in an annulus between a well tubular structure and a wall of a borehole or another well tubular structure downhole for isolating a first zone from a second zone in the annulus, the annulus having an annulus pressure, the annular barrier comprising: a tubular part for being mounted as part of the well tubular structure, the tubular part comprising an inside having an inside pressure, an expandable sleeve surrounding the tubular part and having an inner face facing the tubular part and an outer face facing the borehole or the wall, each end of the expandable sleeve being connected with the tubular part, an annular space between the inner face of the expandable sleeve and the tubular part, the annular space having a space pressure, and a valve system having a first system position in which fluid communication is provided between the inside of the tubular part and the annular space and a second system position in which fluid communication is provided between the annular space and the annulus, and a space fluid channel fluidly connecting the valve system with the annular space and which annular space in the first system position is fluidly connected with the inside of the tubular part and the annular space in the second system position is fluidly connected with the annulus, wherein the annular barrier further comprises an expansion indication unit and a chamber having a chamber pressure which is lower than a predetermined first pressure, the expansion indication unit has a first port in fluid communication with the space fluid channel, a second port in fluid communication with the chamber and a third port in fluid communication with the inside of the tubular part, the expansion indication unit has a first unit position in which the second port is fluidly disconnected from the third port and a second unit position in which the second port is fluidly connected with the third port. The present invention also relates to a downhole system and to an expansion detection method.

A system includes a downhole acquisition tool housing that may receive a fluid that enters the downhole acquisition tool from a first flowline, a second flowline, or both, and a flow control device removably coupled to the downhole acquisition tool and having a housing, a plurality of flow routing plugs that may be in fluid communication to the first flowline, the second flowline, or both, and channels disposed within the housing and fluidly coupled to the plurality of flow routing plugs.

An inflating container filled with formation plugging fluid is deployed at the target zone by a rigless apparatus. The inflating container can be in valved fluid communication with an explosive filled container, the explosive being ignited using a firing mechanism that is attached to the explosive filled container. The explosion expands gases in the explosive filled container which pass into the inflation container and displace the formation plugging fluid into the balloon sections and through the weakened portions of the central balloon to penetrate the walls of the target zone. The expanded central balloon is melted by the heat of the chemical reaction and a portion adheres to the formation wall thereby sealing the undesirable target zone; thereafter, the remaining balloon sections are deflated or ruptured to permit the apparatus to be withdrawn through the production tubing.

Method and apparatus for delivering fluid at a high pressure to a predetermined location in a downhole environment. A tool including a chamber is located in a wellbore with the chamber being at a first chamber pressure and first chamber volume. Fluid is introduced to the chamber through a first fill mechanism to increase pressure in the chamber and close the chamber at a second chamber pressure and a second chamber volume. Pumping fluid through the tool at a pressure greater than the second chamber pressure activates a pressure intensifier in a second fill mechanism and fluid at a multiplied pressure is added to the chamber. The chamber then contains fluid at an increased third chamber pressure and third chamber volume. An embodiment of a packer being set using the apparatus and method is described.

The present invention relates to an annular barrier for providing zonal isolation in an annulus downhole between a well tubular metal structure and another well tubular metal structure or a wall of a borehole, comprising a tubular metal part configured to be mounted as part of the well tubular metal structure and having an inside and an axial extension along the well tubular metal structure, an expandable metal sleeve surrounding the tubular metal part, each end of the expandable metal sleeve being connected with the tubular metal part, defining an expandable space between the expandable metal sleeve and the tubular metal part, and an expansion opening in the tubular metal part through which fluid enters in order to expand the expandable metal sleeve, wherein the annular barrier further comprises a valve unit having a first position and a second position; in the second position for leading pressurised fluid from the expansion opening to the expandable space for expanding the expandable metal sleeve, the valve unit comprises a first aperture in fluid communication with the expansion opening, a second aperture in fluid communication with the annulus and a third aperture in fluid communication with the expandable space. The invention also relates to a downhole system comprising the annular barrier and the well tubular metal structure.

A seal energizing system to maintain seal energization in a well includes a connector body disposed adjacent a tubular body, the tubular body and connector body forming an inner chamber, the inner chamber isolated from an outer chamber by a seal positioned between the tubular body and the connector body. The system further includes a piston movable relative to the connector body. The piston includes a first piston surface exposed to a fluid of the outer chamber and a second piston surface exposed to fluid of the inner chamber. The first piston surface includes a surface area greater than that of the second piston surface.