Abstract: A downhole tool including a housing, a first portion of a trigger mechanism disposed in the housing, a degradable-on-command component movably disposed within the housing, a second portion of the trigger mechanism disposed in the component, the component being configured to positionally respond to an external input to dispose the first portion and second portion in operational contact with one another resulting in an initiation of degradation of the degradable-on-command component. A method for removing a component of a downhole tool.

Abstract: A method of manufacturing a dissolvable article comprises forming a liquid-solid mixture comprising secondary particles homogeneously dispersed in a molten metallic matrix material; disposing the liquid-solid mixture in a mold; agitating the liquid-solid mixture in the mold; and molding the liquid-solid mixture under agitation to form a dissolvable article, wherein the secondary particles and the metallic matrix material form a plurality of micro- or nano-sized galvanic cells in the dissolvable article.

Abstract: A downhole assembly includes a downhole tool including a degradable-on-demand material including: a matrix material; and, a unit in contact with the matrix material. The unit includes a core including an energetic material configured to generate energy upon activation to facilitate degradation of the downhole tool; and, an activator disposed in contact with the core, the activator including a triggering system having an electrical circuit and an igniter within the electrical circuit, the electrical circuit having an open condition and a closed condition, the electrical circuit configured to be in the closed condition after movement of an object downhole that engages directly or indirectly with the triggering system, and the igniter arranged to ignite the energetic material in the closed condition of the electrical circuit. In the open condition of the electrical circuit the igniter is inactive, and in the closed condition of the electrical circuit the igniter is activated.

Abstract: A downhole assembly includes a matrix material and a unit in contact with the matrix material. The unit includes a core having an energetic material, an activator disposed in direct contact with the core, and at least one layer disposed on the core. The activator includes a triggering system having an igniter and a pre-set timer connected in an electrical circuit. The igniter is inactive in an open condition of the electrical circuit, and, after a pre-set time period, the pre-set timer closes the electrical circuit and the igniter is activated.

Abstract: A downhole assembly includes a downhole tool including a degradable-on-demand material, the degradable-on-demand material including a matrix material, and a unit in contact with the matrix material, the unit including a core comprising an energetic material configured to generate energy upon activation to facilitate degradation of the downhole tool and, an activator disposed in contact with the core, the activator having a triggering system including an electrical circuit, an igniter in the electrical circuit arranged to ignite the energetic material, a sensor configured to sense a target event or parameter within the borehole, and a control unit arranged to receive sensed signals from the sensor and to deliver a start signal to the electrical circuit in response to the sensed signals indicating an occurrence of the target event or parameter wherein, after the start signal is delivered from the control unit, the electrical circuit is closed and the igniter is initiated.

Abstract: A lightweight, selectively degradable composite material includes a compacted powder mixture of a first powder and a second powder. The first powder comprises first metal particles comprising Mg, Al, Mn, or Zn, having a first particle oxidation potential. The second powder comprises low-density ceramic, glass, cermet, intermetallic, metal, polymer, or inorganic compound second particles. At least one of the first particles and the second particles includes a metal coating layer of a coating material disposed on an outer surface having a coating oxidation potential that is different than the first particle oxidation potential. The compacted powder mixture has a microstructure comprising: a matrix comprising the first metal particles; the second particles dispersed within the matrix; and a network comprising interconnected adjoining metal coating layers that extends throughout the matrix, the lightweight, selectively degradable composite material having a density of about 3.5 g/cm3 or less.

Abstract: A carbon composite comprises: at least two carbon microstructures; and a binding phase disposed between the at least two carbon microstructures; wherein the binding phase includes a binder comprising one or more of the following SiO2; Si; B; B2O3; a metal; or an alloy of the metal, and the metal is at least one of aluminum; copper; titanium; nickel; tungsten; chromium; iron; manganese; zirconium; hafnium; vanadium; niobium; molybdenum; tin; bismuth; antimony; lead; cadmium; or selenium.

Abstract: A method of deploying an apparatus in a wellbore comprises positioning a device at a predetermined location; wherein the device comprises a composition that contains an expandable graphite, and a metallic binder, and wherein the composition has a first shape; and exposing the composition to a microwave energy to cause the composition to attain a second shape different from the first shape. Alternatively, the composition further comprises an activation material comprising a thermite, a mixture of Al and Ni, or a combination comprising at least one of the foregoing and a method of deploying an apparatus comprising such a composition includes exposing the composition to a selected form of energy.

Abstract: A subterranean screen assembly comprises a base pipe with end connections to attach to a pipe string and a portion that is perforated or slotted; and a coated screen radially outwardly disposed of the base pipe. The coated screen comprises a screen substrate and a coating disposed on a surface of the screen substrate; the coating comprising an amorphous diamond like carbon doped with about 10 to about 30 atomic percent of silicon, about 10 to about 20 atomic percent of oxygen, or a combination comprising at least one of the foregoing dopants, or a polymer comprising a fluoropolymer, a silicone, or a combination comprising at least one of the foregoing.

Abstract: A high pressure high temperature packer features an actuation assembly of a plurality of rings rotationally locked to a mandrel and initially spaced apart. A pressure actuated piston responsive to tubing pressure pushes the actuation rings together. Spring discs also rotationally locked to the mandrel are between pairs of actuation rings that feature a circumferential protrusion. On application of axial force the protrusion engages a sloping portion of the spring disc and moves the sloping portion toward a more vertical orientation. A corrugated tube surrounds the spring discs with a curled end of each spring disc engaged to an internal tube corrugation. A seal element is on the external corrugations of the tube. The spring discs expand the tube to bring the sealing element and external tube peaks to the borehole wall. Slots in the spring disc allow irregular growth of the tube to conform to surface irregularities.

Abstract: Spring discs are rotationally locked to the mandrel are between pairs of actuation rings that feature a circumferential protrusion. On application of axial force release of a stored force from flexing, the protrusion engages a sloping portion of the spring disc and moves the sloping portion toward a more vertical orientation. Alternatively, a release of a stored force from flexing accomplishes the same result. Slots in the spring disc allow irregular growth to conform to surface irregularities of a surrounding surface. The discs can serve as anchors, centralizers or supports for a sealing element in a packer. Ends of fingers feature stiffeners to enhance strength. The discs can be stacked apart or together and oriented in the same or opposed directions. The can deliver an axial force when stacked and pushed toward flat and released.

Abstract: A multilayered unit includes a core comprising an energetic material and an activator; a support layer disposed on the core; and a protective layer disposed on the support layer, wherein the support layer and the protective layer each independently comprises a polymeric material, a metallic material, or a combination comprising at least one of the foregoing, provided that the support layer is compositionally different from the protective layer. The multilayered unit can be embedded in a component, attached to a component, or disposed between two components of a downhole assembly. The downhole assembly containing the multilayered unit has controlled disintegration in a downhole environment.

Abstract: An article comprises a substrate, a coating disposed on a surface of the substrate. The coating comprises a carbon composite dispersed in one or more of the following: a polymer matrix; a metallic matrix; or a ceramic matrix. The carbon composite comprises carbon and a binder containing one or more of the following: SiO2; Si; B; B2O3; a filler metal; or an alloy of the filler metal.

Abstract: A swellable composition comprises: a matrix material; and a condensed expandable graphite material disposed in the matrix material. A seal arrangement comprises: a swellable member and a sealing member disposed on a surface of the swellable member; wherein the swellable member comprises a condensed expandable graphite material. The condensed expandable graphite material in the swellable composition and the swellable member has a bulk density of about 1 to about 8 g/cm3 and comprises expandable graphite.

Abstract: An article comprising a carbon composite containing carbon microstructures having interstitial spaces among the carbon microstructures; and a binder disposed in at least some of the interstitial spaces; wherein the carbon microstructures comprise unfilled voids within the carbon microstructures; and the binder comprises one or more of the following: polytetrafluoroethylene; polyvinyl fluoride; polyvinylidene fluoride; polychlorotrifluoroethylene; perfluoroalkoxy alkane; fluorinated ethylene propylene; ethylene tetrafluoroethylene; ethylene chlorotrifluoroethylene; a peroxide cured copolymer of tetrafluoroethylene and propylene; a fluorocarbon rubber; perfluorocarbon rubber; or a perfluoropolyether.

Abstract: A method of manufacturing an article comprises depositing a metallic powder on a substrate or a worktable; fusing the metallic powder according to a preset pattern; and adjusting a composition of the metallic powder or a condition to fuse the metallic powder or a combination thereof to additively form an article such that the article has a first portion and a second portion, wherein the first portion has one or more of the following properties different than those of the second portion: corrosion rate; tensile strength; compressive strength; modulus; or hardness.

Abstract: An hydrostatic setting tool including a housing defining a central bore, a piston in the housing, a port in the housing exposed to hydrostatic pressure in use, a closure member preventing access of the hydrostatic pressure to the piston, the closure member comprising a degradable-on-demand material; and a source of energy connected to the closure member. A downhole system including the hydrostatic setting tool. A method for setting a downhole tool.

Abstract: A downhole tool including a housing, a first portion of a trigger mechanism disposed in the housing, a degradable-on-command component movably disposed within the housing, a second portion of the trigger mechanism disposed in the component, the component being configured to positionally respond to an external input to dispose the first portion and second portion in operational contact with one another resulting in an initiation of degradation of the degradable-on-command component.

Abstract: A composite particle comprises a core, a shielding layer deposited on the core, and further comprising an interlayer region formed at an interface of the shielding layer and the core, the interlayer region having a reactivity less than that of the core, and the shielding layer having a reactivity less than that of the interlayer region, a metallic layer not identical to the shielding layer and deposited on the shielding layer, the metallic layer having a reactivity less than that of the core, and optionally, an adhesion metal layer deposited on the metallic layer.

Abstract: A downhole assembly includes a downhole tool including a degradable-on-demand material including: a matrix material; and, a unit in contact with the matrix material. The unit includes a core including an energetic material configured to generate energy upon activation to facilitate degradation of the downhole tool; and, an activator disposed in contact with the core, the activator including a triggering system having an electrical circuit and an igniter within the electrical circuit, the electrical circuit having an open condition and a closed condition, the electrical circuit configured to be in the closed condition after movement of an object downhole that engages directly or indirectly with the triggering system, and the igniter arranged to ignite the energetic material in the closed condition of the electrical circuit. In the open condition of the electrical circuit the igniter is inactive, and in the closed condition of the electrical circuit the igniter is activated.