A port assembly for controlling fluid flow through a flow port of a port sub. The port assembly comprises a dissolvable barrier, a burst disk for protecting the dissolvable barrier from fluids inside the port sub, and optionally a protective layer for protecting the dissolvable barrier from external fluids. When the burst disk is ruptured by increased fluid pressure inside the port sub, the dissolvable barrier starts disintegrating from exposure to the fluid. When the dissolvable barrier and protective layer are broken through, a flow passage is opened in the port assembly to permit fluid flow therethrough. The flow passage may be positioned tangentially in the port sub. The breakthrough time of the dissolvable barrier may be preconfigured by providing one or more thinner areas therein and/or placing a corrosive material in the port assembly.

Systems and methods for deployment of electric-based fracturing tools in vertical wells are disclose. A method of electric-based fracturing may include lowering an electrical stimulation tool into a wellbore using a drill pipe and isolating a lower portion of the wellbore that is downhole from an upper portion of the wellbore. The electrical stimulation tool may be disposed in the lower portion of the wellbore. A system for electric-based fracturing may include an isolation mechanism and an electrical stimulation tool. The isolation mechanism may be configured to expand from a retracted configuration spaced from an interior surface of a wellbore to an expanded configuration in contact with the inner surface of the wellbore. The electrical stimulation tool may be operatively coupled with the isolation mechanism and may be configured to be disposed distally relative to the isolation mechanism when positioned in the wellbore.

A method for isolating a horizontal tie-in pipeline of an inactive hydrocarbon-producing well from a main pipeline to prevent flow of hydrocarbons into the tie-in pipeline includes the steps of: identifying a location of a junction of the tie-in pipeline and the main pipeline and cleaning the tie-in pipeline by deploying a locating and cleaning assembly into the tie-in pipeline, withdrawing the locating and cleaning assembly, deploying a plug device having a longitudinally extending forward probe and a sealing element to the location of the junction, and remotely actuating the sealing element. The locating and cleaning device includes a pipeline junction sensing element longitudinally extending from a forward end of the locating and cleaning device. The sensing element is connected to a valve which, when open, relieves pressure in the locating and cleaning assembly as an indicator of the location of the junction.

A packer assembly includes a mandrel and a packing element disposed about the mandrel. Upper and lower recovery sleeves are disposed about the mandrel and extend between the mandrel and respective upper and lower ends of the packing element. The upper and lower recovery sleeves each have a recovery profile embedded within the packing element. Upper and lower backup assemblies are movably disposed about the respective upper and lower recovery sleeves, adjacent to the respective upper and lower ends of the packing element. The packer assembly includes at least one release mechanism. When setting the packer assembly in a bore, the packing element is axially compressed between the upper and lower backup assemblies to contact the bore wall, and the upper and lower backup assemblies splay outwards. Upon release, the packing element and backup assemblies retract, thereby facilitating retrieval of the packer assembly from the bore.

The present invention relates to a downhole expandable metal tubular to be expanded in a well from a first outer diameter to a second outer diameter to abut against an inner face of a casing or borehole, the downhole expandable metal tubular having an axial extension, a circumference and an outer face, wherein the downhole expandable metal tubular is of metal with at least one first integral circumferential sealing element of metal as part of the outer face, providing the downhole expandable metal tubular with a first circumferential projection having a fourth height, and the at least one first integral circumferential sealing element at least partly defines a cavity having an opening. Moreover, the present invention also relates to a downhole expandable metal tubular assembly further comprising at least one end tubular, a patch for being expanded within a well tubular metal structure for sealing off leaks, perforations or apertures in the well tubular metal structure, and an annular barrier to be expanded in an annulus between a well tubular structure and an inner face of a borehole or a casing downhole for providing zone isolation between a first zone and a second zone of the borehole.

A method for use of biomass waste to seal a well, includes the steps of: locating a well to be sealed, the well having a lower plug and casing; providing biomass waste; introducing the biomass waste into the casing of the well to fill the casing with the biomass waste to a level above the lower plug; and setting an upper plug immediately above the level of biomass waste.

A packer system for a wellbore. The system includes a base packing element mounted to an inner surface of a first tubular and an actuator which actuates the base packing element in a radially inward direction. The system further includes a first trigger element disposed at the inner surface of the first tubular and operatively connected with the actuator, and a second trigger element disposed at an outer surface of a second tubular. The second tubular is displaceable in an axial direction with respect to the first tubular, wherein, upon displacing the second tubular at a predetermined position within the first tubular: the second trigger element engages with the first trigger element; and the first trigger element causes the actuator to actuate the base packing element in a radially inward direction, to bridge a space between the first tubular and second tubulars. Also disclosed and described is a related method.

The pipe ball joint includes a casing having a socket portion with a substantially spherical interior surface and a first pipe segment extending from the socket portion. The socket portion has an annular groove disposed adjacent the partially spherical interior surface. A ball pipe section includes a ball segment received in the socket portion of the casing and a second pipe segment extending from the ball segment. A seal assembly is received in the annular groove of the casing and is disposed against the ball segment of the ball pipe section. The seal assembly includes a plurality of nested seal rings that each include a concave face and a convex face.

A system and method protect a packer during deployment in a borehole. The system comprises a shaft, the packer, a protective member, a movement mechanism, and an expansion mechanism. The shaft has a longitudinal length along a longitudinal axis extending in the borehole having an inner surface. The packer surrounds the shaft at a predetermined position along the longitudinal length. The protective member surrounds the shaft and is vertically positioned above or below the packer. The movement mechanism is configured to move the protective member to the predetermined position in order to surround the packer, thereby protecting the packer. The expansion mechanism is configured to expand the packer and the protective member when positioned around the packer to position the protective member in contact with the inner surface of the borehole. A method comprises steps performed during operation of the system.

A task is to provide a non-aqueous electrolytic solution exhibiting excellent cycle capacity maintaining ratio and excellent low-temperature resistance characteristics and a non-aqueous electrolyte secondary battery using the same. An object of the present invention is to provide a non-aqueous electrolytic solution which improves the cycle capacity maintaining ratio and low-temperature resistance characteristics, and a non-aqueous electrolyte secondary battery using the non-aqueous electrolytic solution. The present invention is a non-aqueous electrolytic solution comprising an electrolyte and a non-aqueous solvent dissolving therein the electrolyte, wherein the non-aqueous electrolytic solution contains a compound represented by formula (1) (wherein X represents an organic group containing a heteroatom, Y represents a sulfur atom, a phosphorus atom, or a carbon atom, n represents an integer of 1 or 2, m represents an integer of 2 to 4, l represents an integer of 1 or 2, and Z represents an organic group having 4 to 12 carbon atoms and optionally having a heteroatom), and a non-aqueous electrolyte secondary battery comprising the non-aqueous electrolytic solution.