A downhole chemical reactor can be placed in a downhole environment to generate gas in-situ. This gas can pressurize an inner pressure chamber of the downhole chemical reactor to create a pressure-on-demand source or to maintain a constant pressure reservoir, depending on the configuration of a reactor controller coupled to an inlet of the inner pressure chamber. The inner pressure chamber contains one or more desired chemical reactants and the reactor controller operates to permit well fluid to flow from the wellbore and into the inner pressure chamber. The well fluid reacts with the desired chemical reactants and generates one or more gases such as hydrogen or carbon dioxide. The generated gases pressurize the inner pressure chamber and a pressure regulator coupled to the inner pressure chamber maintains a maximum pressurization of the inner pressure chamber. For a constant pressure reservoir, the reactor controller repeats this cycle indefinitely.

A method and apparatus provide for separating a fluid conveyance, such as coiled tubing, wherein the apparatus includes an anchor section and a carrier that, when united, create an explosive force, separating the fluid conveyance.

An inflatable multifunctional downhole tool includes a body having an outer shell and a threaded connection at an axial end of the body, at least one pressurized container disposed inside the outer shell, the pressurized container containing compressed gas, a plurality of floatation chambers fluidly connected through connection lines to the at least one pressurized container, a dissolvable plug positioned along each of the connection lines between the floatation chambers and the at least one pressurized container, and a tool sub threadably connected to the threaded connection of the body.

A downhole oil level detection device includes a mounting housing (1) and a balance cylinder (2) installed on the mounting housing (1). The balance cylinder (2) includes a cylinder body (25) and a moving piston (21), a piston tension spring (22), a moving rod (23), a moving rod compression spring (24) and a displacement sensor (3) installed in the cylinder body (25). One end of the piston tension spring (22) is fixed to one end of the cylinder body (25), the other end thereof is connected to one side of the moving piston (21); one side of the moving piston (21) is also connected to one end of the moving rod compression spring (24), the other end of the moving rod compression spring (24) is connected to one end of the moving rod (23), the other end of the moving rod (23) is provided with the displacement sensor (3).

A window cutting system includes a whipstock having an outer surface, an inner surface, a recess, and a passage extending through the outer surface and the inner surface in the recess. A window mill is connected to the whipstock. The window mill includes a body having a tip portion, a pressure compartment formed in the tip portion, and an axial passage extending though the tip portion from the pressure compartment. A pin connects the window mill and the whipstock. The pin is arranged in the pressure compartment and extends through the axial passage and the passage into the recess. The pin is axially shiftable relative to the window mill and the whipstock when exposed to pressure in the pressure compartment.

The present invention relates to a downhole packer assembly for expansion of a metal sleeve, such as a metal patch, in a well downhole in a well tubular metal structure, comprising a body part and an expandable tubular element surrounding the body part and each end of the expandable tubular element being connected with the body part, providing an expandable space therebetween, the expandable space being fillable with liquid during expansion, the expandable tubular element having an outer face and an inner face, the expandable tubular element comprising an elastomeric or rubber material having a friction coefficient, wherein the expandable tubular element comprises a friction-enhancing material providing a higher friction coefficient of the outer face than the friction coefficient of the elastomeric or rubber material. The invention also relates to a downhole system comprising the downhole packer assembly and a positive displacement pump for expanding the expandable tubular element.

A downhole device for applying and regulating pressure to a hydraulic device. The downhole device includes a relief check valve, a pressure transfer check valve, a hydraulic chamber, an output port, and a fluid separator. Pressure from the hydraulic chamber is applied to the hydraulic device to actuate the hydraulic device.

A setting tool includes a barrel piston that is configured to couple to a setting sleeve and defines a working surface and a vent port. An upper mandrel is disposed within the barrel piston and defines a power charge chamber that is configured to receive a power charge and includes an upper threaded portion, a lower internal thread, and a plurality of axial discharge ports disposed circumferentially around the lower internal thread. The plurality of axial discharge ports are in fluid communication at one end with the power charge chamber and at the other end with the working surface of the barrel piston. A lower mandrel has an upper end and a lower end, with the upper end in threaded engagement with the lower internal thread of the upper mandrel, and the lower end configured to couple to a frac plug. The power charge chamber includes an upper chamber and a lower chamber, with the lower chamber shaped to open to be in fluid communication with each of the plurality of axial discharge ports. The barrel piston is configured for axial displacement with respect to the upper mandrel to position the vent port in fluid communication with the power charge chamber.

A tie-back string and a method of coupling the tie-back string to a casing is disclosed. The tie-back string is disposed within the casing. The tie-back string includes an anchor and an actuator section. The actuator section including a sleeve that forms a first chamber and a setting piston that forms a second chamber. A pressure differential is created between the first chamber and the second chamber to move the setting piston to engage the anchor of the tie-back string.

A power charge for actuating a wellbore tool. Combustion of the power charge generates gas and corresponding gas pressure within the wellbore tool and the power charge and wellbore tool are configured for providing a path to an expansion chamber for the gas pressure. A body of the power charge may have the shape of a regular polygonal cylinder, thus defining flow-paths for the expanding gas. The power charge may include a cylinder of energetic material and an interior space formed within the energetic material and configured for receiving an igniter and/or ignition material. Ignition of the igniter or ignition material results in combustion of the power charge.