A system provides for the remote activation and deactivation of a downhole tool such as an agitator tool. The downhole tool uses a dart-catching section configured with a profile that engages with a corresponding key section of a dart. Different tools in the string may have different profiles, allowing darts to pass through tools to reach a tool with a matching profile further downhole. The dart includes a removable nozzle that can be detached by a object dropped from the surface, after which a second dart may be dropped to engage with the first dart to change operating parameters of the tool.

A system provides for the remote activation and deactivation of a downhole tool such as an agitator tool. The downhole tool uses a dart-catching section configured with a profile that engages with a corresponding key section of a dart. Different tools in the string may have different profiles, allowing darts to pass through tools to reach a tool with a matching profile further downhole. The dart includes a removable nozzle that can be detached by a object dropped from the surface, after which a second dart may be dropped to engage with the first dart to change operating parameters of the tool.

A pressure assisted oil recovery system and apparatus that has a pulsating effect unit, a multiphasic flow meter, and a production lift system that passes through a wellbore up to an oil reservoir. The pulsating effect unit has a control valve and a smart control unit. The production lift system has production tubing and a wellhead. The pulsating effect unit is connected to the production lift system. The multiphasic flow meter is connected to the production tubing to obtain well production parameters data. The control valve opens and closes having an opening/closing predetermined frequency. When the control valve opens and closes, it generates pressure variations along the production tubing. The pressure variations create a pulsating effect on walls of the wellbore. The multiphasic flow meter and the pulsating effect unit set an optimal opening/closing frequency of the control valve.

A pressure assisted oil recovery system and apparatus that has a pulsating effect unit, a multiphasic flow meter, and a production lift system that passes through a wellbore up to an oil reservoir. The pulsating effect unit has a control valve and a smart control unit. The production lift system has production tubing and a wellhead. The pulsating effect unit is connected to the production lift system. The multiphasic flow meter is connected to the production tubing to obtain well production parameters data. The control valve opens and closes having an opening/closing predetermined frequency. When the control valve opens and closes, it generates pressure variations along the production tubing. The pressure variations create a pulsating effect on walls of the wellbore. The multiphasic flow meter and the pulsating effect unit set an optimal opening/closing frequency of the control valve.

Downhole neutron generators, downhole logging tools that utilize neutron generators, and methods to auto tune downhole neutron generators are disclosed. While a neutron generator is deployed in a borehole of a wellbore, the method includes determining whether an oscillation cycle of an ion beam current generated by the neutron generator is stable. After a determination that the oscillation cycle of the ion beam current is stable, the method includes determining proportional, integral, and derivative parameters of a proportional-integral-derivative controller that is operable to adjust an amount of power supplied to generate ions. The method further includes adjusting a replenish voltage of a replenish power supply of the neutron generator based on the proportional, integral, and derivative parameters.

Downhole neutron generators, downhole logging tools that utilize neutron generators, and methods to auto tune downhole neutron generators are disclosed. While a neutron generator is deployed in a borehole of a wellbore, the method includes determining whether an oscillation cycle of an ion beam current generated by the neutron generator is stable. After a determination that the oscillation cycle of the ion beam current is stable, the method includes determining proportional, integral, and derivative parameters of a proportional-integral-derivative controller that is operable to adjust an amount of power supplied to generate ions. The method further includes adjusting a replenish voltage of a replenish power supply of the neutron generator based on the proportional, integral, and derivative parameters.

A means to generate increasing geological permeability to produce greater volumes of various subsurface geological resources when compared to the current conventional production methods is disclosed. The means include a Pulsed Power Plasma Emitter System capable of substantially increasing the available electrical energy for use in high power compression surge currents that can be discharged and transmitted to power a simplified downhole Plasma Emitter Tool subsystem. The simplified downhole Plasma Emitter Tool sub-system is capable of generating a broad range of precisely controlled magnetohydrodynamic plasma spark discharges that produce a broad range of high power electromagnetic, acoustic and hydrodynamic surge waves. These powerful surge waves are generated at energy and power levels that are necessary to physically modify all types of geological formation permeability and to energize the mobilization of various subsurface fluids and fluidized resources.

A means to generate increasing geological permeability to produce greater volumes of various subsurface geological resources when compared to the current conventional production methods is disclosed. The means include a Pulsed Power Plasma Emitter System capable of substantially increasing the available electrical energy for use in high power compression surge currents that can be discharged and transmitted to power a simplified downhole Plasma Emitter Tool subsystem. The simplified downhole Plasma Emitter Tool sub-system is capable of generating a broad range of precisely controlled magnetohydrodynamic plasma spark discharges that produce a broad range of high power electromagnetic, acoustic and hydrodynamic surge waves. These powerful surge waves are generated at energy and power levels that are necessary to physically modify all types of geological formation permeability and to energize the mobilization of various subsurface fluids and fluidized resources.

A friction reduction system disposable in a wellbore includes a first valve member including an inner surface which includes a valve seat; and a second valve member rotatable concentrically about a central axis of the first valve member and including a radial port coverable by the valve seat of the outer valve member, wherein the friction reduction system includes an open configuration that provides a maximum flow area through a valve of the friction reduction system including the second valve member and the first valve member, wherein the friction reduction system includes a closed configuration that provides a minimum flow area through the valve which is less than the maximum flow area, and wherein the friction reduction system is configured to generate a pressure pulse in a fluid flowing through the friction reduction system in response to the friction reduction system transitioning from the open configuration to the closed configuration.

A pump down intervention tool may be pumped downhole through a work string after an installation of the work string. The pump down intervention tool may include a downhole tool that includes but is not limited to an agitator tool, including but not limited to a fluidic pulsation device, or a check valve. The pump down intervention tool may be pumped downhole in the work string, for example but not limited to in a coiled tubing or jointed pipes. The pump down intervention tool may be landed at a desired location along a length of the work string. The pump down intervention tool can allow for the addition of a downhole tool after the work string's initial deployment, providing a desired functionality downhole at time after the initial deployment of the work string downhole.