Abstract: A perforation assembly includes a perforation tool and a propulsion unit coupled to the perforation tool, the propulsion unit comprising an impeller and a protective structure disposed around the impeller.

Abstract: A float collar for assembly with a composite string of downhole tubulars includes: a tubular housing made from a composite material and having couplings formed at longitudinal ends thereof; a float valve disposed in a bore of the housing; a sheath connecting the float valve to the housing and sealing an interface between the float valve and the housing; and a guide operable to prevent side-tracking of a drill bit into the housing while drilling out the float valve and the sheath.

Abstract: A tubular joint installable on a tubular string disposable within a wellbore. The tubular joint may include includes a perforated section, a filter section, and a packer. The perforated section may be proximate a first end and may include a first plurality of orifices to allow fluid communication between a bore of the tubular joint and a first area surrounding the tubular joint proximate the perforated section. The filter section may be proximate a second end and may include a filter assembly sized to filter fluid flowing into the bore via a second plurality of orifices from a second area proximate the filter section. The packer may be disposed between the perforated section and the filter section and may be operable to isolate the first area from the second area when the tubular string is disposed within the well.

Abstract: A variety of methods/systems/apparatus/compositions are disclosed, including, in one embodiment, a downhole tool (for use in a borehole) having a mandrel, a sealing element including metal particles disposed about the mandrel, and a piston to move a containment component of the downhole tool in an axial direction to move the metal particles in the axial direction, thereby displacing the metal particles in a radial direction toward a borehole wall to expand the sealing element in the radial direction to form a seal between the downhole tool and the borehole wall.

Abstract: A wet-mate connector assembly can include a male portion having a male electrical contact with a valve metal alloy thereon. The wet-mate connector assembly can also include a female portion having a female electrical contact with the valve metal alloy thereon. The female portion can receive the male portion for defining a fluid flow path therein and can form an electrical connection with the male portion. The valve metal alloy can respond to an electrical charge and a downhole fluid by forming an insulation layer on at least one of the male electrical contact or the female electrical contact in a downhole of a well.

Abstract: Provided is an expandable liner hanger assembly and a well system including the same. The expandable liner hanger assembly, in one aspect, includes a radially expandable tubular defining an interior passageway and an exterior surface. The expandable liner hanger assembly, in accordance with this aspect, further includes one or more continuous anchoring ridges extending radially outward from the radially expandable tubular, at least one of the one or more continuous anchoring ridges having a plurality of localized hardened sections placed circumferentially there around, the radially expandable tubular configured to move from an initial state wherein the one or more continuous anchoring ridges are not in contact with a wellbore tubular to an expanded state wherein the one or more continuous anchoring ridges are in gripping engagement with the wellbore tubular.

Abstract: A method and apparatus for inserting a detonator into a door on an end fitting and closing the door into a recess of the end fitting, enabling a quick wireless install of a detonator and resulting in a side-by-side arrangement between the detonator and the detonating cord.

Abstract: An annular piston pile driver for use with a fluid jet drill system for boring holes in both residential and non-residential areas for geothermal energy shafts. The annular piston pile driver having an inner cylinder an outer cylinder, a piston, a driver coupling, an upper sealing component, and a lower sealing component. The outer cylinder circumscribing the inner cylinder such that the inner cylinder and the outer cylinder form an annular space therebetween. The piston comprising a piston shaft and a piston head, wherein the piston is disposed within the annular space and configured to travel along an axis.

Abstract: A fluid sensor, and associated monitoring and control system, employing a cylindrical venturi to eliminate stratification of fluid passing therethrough, and a capacitive sensor operatively coupled with the cylindrical venturi to facilitate the sensing of the fluid while in the venturi.

Abstract: A detonation module for a perforation tool includes a detonator, a switch circuit disposed in a fluid-sealed housing and electrically coupled to the detonator, a shielding circuit coupled to the switch circuit, an annular electrical contact electrically coupled to the switch circuit, and an annular, electrically conductive, compressive member to form a compressive electrical connection with an end of a perforation unit.

Abstract: A method for expanding a two-stage expandable liner hanger includes expanding a first section of an expandable tubular having the first section and a second section. The first section includes one or more anchoring ribs. The method further includes expanding the second section of the expandable tubular after cement is pumped into the expandable tubular.

Abstract: 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.

Abstract: A downhole tool and method, of which the downhole tool includes a housing defining a charge chamber and a hydraulic chamber, the hydraulic chamber containing a hydraulic fluid, and a piston disposed in the hydraulic chamber. The piston prevents the hydraulic fluid from communicating with the charge chamber, and is in communication with the hydraulic fluid and the charge chamber. The tool also includes one or more charges disposed in the charge chamber. The one or more charges are configured to ignite and thereby expand a gas in the charge chamber. The tool further includes a fluid-metering device coupled to the housing. The fluid-metering device is configured to control a rate at which the hydraulic fluid is pressed out of the hydraulic chamber.

Abstract: A method includes deploying a bottom hole assembly downhole into a wellbore lined with a casing. While the bottom hole assembly is deployed downhole, the bottom hole assembly is used to: place a guiding profile within the wellbore casing, wherein the guiding profile is structured to physically guide a downhole drill in a direction different from that of a longitudinal axis of the casing; cut a window in the casing with a laser cutter; and withdraw at least one cut portion of the casing away from the window. A related bottom hole assembly includes: a laser cutter for cutting a window in a wellbore casing; a withdrawal mechanism for withdrawing at least one cut portion of the casing away from the cut window; and a releasable guiding profile structured to physically guide a downhole drill in a direction away from the wellbore casing.

Abstract: An impact sleeve is used for mitigating damage in a perforating gun resulting from shaped charge detonation. In one example, a perforating gun includes a gun carrier, with a charge holder and the impact sleeve inside the gun carrier. The charge holder holds a plurality of shaped charges capable of being detonated with sufficient explosive energy to generate high-velocity fragments inside the gun carrier. The impact sleeve comprises an energy-absorbing material and optional raised features for absorbing at least some energy of the high-velocity fragments. The materials, raised features, positioning, and geometry of the impact sleeve and raised features may be tuned to optimize energy absorption.

Abstract: An apparatus for generating acoustic waves in a medium to stimulate oil recovery within an oil reservoir, operable with a single moving part—a central rotor. The apparatus is suitable for use in association with a system to facilitate the cogeneration of geothermal energy or sequestration and storage of CO2.

Abstract: A hazardous waste repository includes a drillhole formed from a terranean surface into a subterranean formation. The drillhole includes an entry at the terranean surface and an access portion that extends from the entry toward a storage portion within the subterranean formation. The hazardous waste repository further includes a plurality of hazardous waste canisters emplaced within the storage portion of the drillhole, each of the hazardous waste canisters enclosing hazardous waste; and a granular material installed in a volume of the drillhole between a casing and the plurality of canisters and between adjacent canisters of the plurality of canisters. The granular material is configured to support at least a portion of a weight of each of the plurality of canisters.

Abstract: A high pressure fluid drill head system for boring holes in both residential and non-residential areas for geothermal energy shafts. The high pressure drill head system having a body sized for the intended borehole to be drilled and including a plurality of parts coupled together via one or more fastening methods. The plurality of parts including an outflow channel within the body, a piston, at least one high pressure flow channel disposed within the body, the high pressure flow channel disposed parallel to the outflow channel, a nozzle in fluid communication with the high pressure flow channel, the nozzle having at least one orifice configured for ejecting a fluid, and a return feed inlet disposed at the lower end of the body, the return feed inlet in fluid communication with the outflow channel.

Abstract: An apparatus for reducing torque in a drill string includes a clamp assembly having a first clamp segment and a second clamp segment, the first and second clamp segments each being generally arcuate and configured to connect together so as to secure the clamp assembly around an oilfield tubular and prevent the clamp assembly from axial and rotational movement relative to the oilfield tubular. The first and second clamp segments each include a first extension and a second extension, each of the first and second extensions having a tapered end that decreases in outer diameter as proceeding in an axial direction, so as to provide a conical guide surface. An outer sleeve is positioned around the clamp assembly, is configured to rotate with respect to the oilfield tubular and the clamp assembly, and is prevented from axial movement relative thereto.

Abstract: A technique facilitates multiple actuations of a toe valve system positioned along a tubing string. According to an embodiment, the toe valve system comprises a piston sleeve slidably disposed in an outer housing which has at least one port therethrough. The toe valve system also may comprise a shifting sleeve shiftable between positions with respect to the at least one port. The piston sleeve may initially be held in a position closing off the at least one port to prevent flow between the interior and exterior of the tubing string. The piston sleeve is held in this closed position via a liquid trapped in a piston chamber which is located between the piston sleeve and the outer housing. The liquid, e.g. oil, is retained in the piston chamber by a release member, e.g. a rupture disc, until sufficient pressure is applied within the toe valve system and against the piston sleeve so as to actuate the release member and to thus allow outflow of liquid from the piston chamber.