A device and method for collecting sample fluids from an underground source which includes sample wells terminating in a corrugated conduit and sieve. The sampling regions for each sample well is separated by a grout or expanding seal barrier. Negative pressure is optionally applied to extract fluids from the underground matrix for sampling. The device can also be used for remediating an environmental contaminant from soil or aquifers. Upon identification of at least one environmental contaminant, a remediation composition is injected into the soil or aquifer using the sampling wells of the device. The remediation fluids can be directed to specific locations by selectively utilizing one or more sampling wells to inject the remediation fluid.

A straddle packer assembly for deployment in a wellbore in which the straddle packer assembly includes a mandrel on which is mounted a first inflatable element and a second inflatable element. A first end of the first inflatable element is fixed, while a second end slides on the mandrel. Both the first and second ends of the second inflatable element are slidable on the mandrel, and the first end of the second inflatable element is coupled to the second end of the first inflatable element. The inflatable elements are inflated separately, with the first inflatable element inflated first until it seats against the wellbore wall. As the first inflatable element expands radially and contracts axially, the second inflatable element moves in axial concert with the first inflatable element so as to maintain a fixed distance between the two inflatable elements.

A technique facilitates control over packers and/or other well tools actuated downhole. The technique utilizes a valve connectable into a well string. The valve is shiftable between a plurality of modes so as to control flow of fluid in a downhole environment. Additionally, an actuator system is connectable into the well string and operatively coupled with the valve. The actuator system is electronically controlled to cause the valve to shift to a desired mode of the plurality of modes. This approach enables electronic control over the actuation of specific downhole tools, e.g. packers, and/or other well related operations.

Systems and methods presented herein provide for the generation of acoustic waves for acoustic stimulation, as well as for analysis of subterranean formations, using downhole tools and associated equipment that are not conventionally designed to do so. For example, in certain embodiments, formation testing tools, formation, measurement tools, inflatable packers, and so forth, may be controlled by control systems to, for example, create pressure pulses that generate the acoustic waves. In addition, in certain embodiments, a tool conveyance system that conveys a formation testing or measurement tool into a wellbore may include acoustic receivers that may detect the acoustic waves after they reflect from subterranean features of the formation.

A packer apparatus is disclosed. Packer apparatus comprises a body configured to be disposed in a wellbore and a deformable packer element disposed on the body. The deformable packer element comprises a deformable metallic outer cover. An actuation apparatus is configured to move relative to the body to deform said deformable packer element outwardly from the body to cause the deformable metallic outer cover to contact the surface of the wellbore or casing in which the apparatus is located. Deactivation of the actuation apparatus causes the deformable packer element and deformable metallic outer cover to return to a retracted condition.

A wellbore assembly includes a first tube and a second tube. The first tube is disposed within a wellbore and has a first end fixed with respect to a wall of the wellbore. The second tube is coupled to a second end of the first tube. The second tube has a third end opposite the coupling and fixed with respect to the wall of the wellbore. The first tube includes a portion of reduced or increased diameter residing between the first end and the second end. The portion of reduced or increased diameter defines an internal diameter that changes, with the first tube under a compression load, to decrease a length of the first tube. The internal diameter changes, with the first tube under a tensile load, to increase a length of the first tube to accommodate changes in length of the first tube or the second tube or both.

A wellbore isolation device includes a mandrel, a sealing element disposed around at least a portion of the mandrel, and a delay coating disposed on at least a portion of an outer surface of the sealing element. The sealing element includes a swellable material and the delay coating covers a cross-linked polymer. The delay coating is configured to swell or degrade in a wellbore fluid.

The present invention relates to a plug and abandonment system for plugging and abandoning a well having a top, comprising a first annular barrier having a first end and a second end, the first end comprising a first ball seat and the second end being connected with a first disconnectable area, a second annular barrier having a first end and a second end, the first end comprising a second ball seat and being connected with the first disconnectable area, a work string, such as drill pipe, extending from a first string end to the top of the well, the first string end being disconnectably connected with the second end of the second annular barrier, wherein each of the annular barriers comprises an expandable metal sleeve being connected to at least one tubular part forming a tubular bore for allowing liquid and cement to flow through the annular barriers. Moreover, the invention also relates to a plug and abandonment method for providing a safe plug and abandonment of a well having at least one production zone.

An inflatable packer assembly comprising a first fixed sleeve fixed to a mandrel, a first sliding sleeve moveable along the mandrel, and a first inflatable member connected to the first fixed sleeve and the first sliding sleeve. A second sliding sleeve is moveable along the mandrel, and a second inflatable member is connected to the first sliding sleeve and the second sliding sleeve. A second fixed sleeve is fixed to the mandrel and slidably engages the second sliding sleeve. An inflation flowline disposed within the mandrel is in fluid communication with interiors of the first and second inflatable members for inflating the first and second inflatable members to isolate a portion of a wellbore penetrating a subterranean formation. An injection flowline is disposed within the mandrel for injecting a fluid into the isolated wellbore portion at a high enough pressure to create microfractures in the subterranean formation.

The present invention relates to an annular barrier system for completing a well with a well tubular metal structure, comprising the well tubular metal structure and a first annular barrier and a second annular barrier, each annular barrier comprising a tubular metal part having a bore and mounted as part of 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, and an annular space between the expandable metal sleeve and the tubular metal part, each annular barrier being introduced and set in the well to abut a wall of the well, providing a confined space having a confined pressure Pc between the wall, part of the well tubular metal structure, the first annular barrier and the second annular barrier, so that the first annular barrier isolates the confined space from a first annulus having a first pressure, and the second annular barrier isolates the confined space from a second annulus having a second pressure, wherein the annular barrier system comprises a valve system having a first position in which the bore is in fluid communication with the annular space of at least one of the first annular barrier and the second annular barrier in order to expand the expandable metal sleeve, and a second position in which the bore is in fluid communication with the confined space in order to perform barrier verification by pressurising the confined space.