Abstract: An apparatus for controlling bottomhole pressure in a wellbore during cementing includes a sensor positionable to measure pressure in the bottomhole of the wellbore, a controllable valve, and a controller. The controller may be positionable to receive pressure measurements from the sensor and control the controllable valve to maintain a specified pressure in the wellbore based on the pressure measurements. The apparatus may be positionable in a bottomhole portion of the wellbore.

Abstract: A centralizing perforating gun for perforating a tubular in a wellbore include a gun housing, perforating charges positioned within the gun housing and detonatable to perforate the tubular, and a centralizing system. The centralizing system includes an extendable member configured to move between a retracted position and an extended position. The extendable member is configured to engage a surface of the tubular in the extended position, thereby biasing the centralizing perforating gun away from the surface of the tubular.

Abstract: An apparatus for controlling bottomhole pressure in a wellbore during cementing includes a sensor positionable to measure pressure in the bottomhole of the wellbore, a controllable valve, and a controller. The controller may be positionable to receive pressure measurements from the sensor and control the controllable valve to maintain a specified pressure in the wellbore based on the pressure measurements. The apparatus may be positionable in a bottomhole portion of the wellbore.

Abstract: A centralizing perforating gun for perforating a tubular in a wellbore include a gun housing, perforating charges positioned within the gun housing and detonatable to perforate the tubular, and a centralizing system. The centralizing system includes an extendable member configured to move between a retracted position and an extended position. The extendable member is configured to engage a surface of the tubular in the extended position, thereby biasing the centralizing perforating gun away from the surface of the tubular.

Abstract: A downhole tool includes a tool body and an anchoring device integrated with the tool body. The anchoring device includes a contact pad that is at least partially external to the tool body, the contact pad having multiple stages with different thicknesses. The anchoring tool also includes a first linear actuator and a second linear actuator. The first linear actuator is configured to move the contact pad axially with respect to the tool body to align one of the multiple stages with the second linear actuator. The second linear actuator is configured to apply a radial force to the contact pad.

Abstract: An apparatus for obtaining a plurality of fluid samples in a subterranean well includes a carrier, a plurality of sampling chambers and a plurality of pressure sources. The sampling chambers and pressure sources substantially comprises non-metallic materials. One or more of the following: conductors, transducers, power sources, communicators, data memory and processors are embedded in the materials comprising the sampler apparatus. One or more transducers for measuring the temperature, pressure, and volume of the sample are present in at least one of the plurality of sampling chambers. Means for measuring the parameters of the wellbore fluid are also present in the sampler apparatus. Means for communicating measured data to the surface are provided in the sampling apparatus.

Abstract: A system for temperature management of a downhole thermal component includes a heat exchanger thermally coupled with the thermal component and a heat exhausting temperature management system thermally coupled with the thermal component and the heat exchanger to transfer heat from the thermal component to the heat exchanger. The system may include an electrical device coupled between the thermal component and the heat exchanger and a power source to provide an energy flow to the electrical device to transfer heat from the thermal component to the heat exchanger. The system may include a thermoelectric cooler coupled between the thermal component and the heat exchanger. A method includes energizing an electrical device or a thermoelectric cooler to transfer heat from the thermal component to the heat exchanger.

Abstract: A logging sensor or tool including a structural component, a non-structural component, and a composite disposed between the structural component and the non-structural component. The composite may contain a metallic foam having pores and an elastomeric material deposited in the pores. The elastomeric material may include an elastomer and a plurality of metallic shield particles. A logging system and to a wireline system containing such a logging sensor or tool.

Abstract: A first lobe is fixedly coupled to a wall of a housing. A fixed pivot is fixedly coupled to the first lobe and to the wall of the housing. A chamber pivot is rotatably coupled to the first lobe. A floating pivot is rotatably coupled to the chamber pivot. A first link is rotatably coupled to the floating pivot. A slip pivot is rotatably coupled to the first link. A second link is rotatably coupled to the slip pivot and to the fixed pivot. A pad is coupled to the slip pivot. An actuator is coupled to the first lobe and to the second lobe.

Abstract: The disclosure provides a downhole anchoring apparatus for use in a downhole tool. In an example implementation, a system is provided to anchor downhole tools in a wellbore. The system may include a tool body that fits within a wellbore casing, a slip having a wedge surface, a linkage connecting the slip to the tool body, and an actuator assembly. The actuator assembly may include a first actuator having a wedge surface corresponding to the slip wedge surface and a second actuator having a wedge surface corresponding to the slip wedge surface.

Abstract: A downhole tool includes a tool body and an anchoring device integrated with the tool body. The anchoring device includes a contact pad that is at least partially external to the tool body, the contact pad having multiple stages with different thicknesses. The anchoring tool also includes a first linear actuator and a second linear actuator. The first linear actuator is configured to move the contact pad axially with respect to the tool body to align one of the multiple stages with the second linear actuator. The second linear actuator is configured to apply a radial force to the contact pad.

Abstract: A downhole tool includes a temperature sensitive component. The temperature of the temperature sensitive component is at least partially controlled by a temperature management system thermally coupled to the temperature sensitive component. The temperature management system may include a cold plate thermally coupled to the temperature sensitive component, a hot plate thermally coupled to the cold plate, and a thermo-electrical converter system thermally coupled to the hot plate and to the body of the downhole tool, wherein the thermo-electrical converter system comprises two membrane electrode assemblies.

Abstract: A downhole tool includes a temperature sensitive component. The temperature of the temperature sensitive component is at least partially controlled by a temperature management system thermally coupled to the temperature sensitive component. The temperature management system may include a cooling mixture chamber thermally coupled to the temperature sensitive component, wherein first and second components of a cooling mixture cause an endothermic reaction when mixed together within the cooling mixture chamber.

Abstract: A downhole tool includes a temperature sensitive component. The temperature of the temperature sensitive component is at least partially controlled by a temperature management system thermally coupled to the temperature sensitive component. A metal hydride may be selectively thermally coupled to a cold plate that is thermally coupled to the temperature sensitive component.

Abstract: Apparatus is provided for use in power generation, including a fluid-flow-driven power generator for use in a fluid-containing pipe such as a drill pipe as used in oil and gas exploration and extraction. Parts of the generator are removable from the pipe—for example while a drill pipe is downhole within a drilling well—to leave a clear through bore for survey and fishing operations and to enable replacement of the removed parts. The flow-driven generator comprises an impeller connected to a magnet assembly to rotate the magnet assembly when fluid flows past the impeller. This causes relative movement between the magnet assembly and an adjacent electrical coil assembly, the relative movement and magnetic coupling generating an electrical current in the coil assembly. This generated electrical current is used to power electrical devices within the pipe.

Abstract: A first lobe is fixedly coupled to a wall of a housing. A fixed pivot is fixedly coupled to the first lobe and to the wall of the housing. A chamber pivot is rotatably coupled to the first lobe. A floating pivot is rotatably coupled to the chamber pivot. A first link is rotatably coupled to the floating pivot. A slip pivot is rotatably coupled to the first link. A second link is rotatably coupled to the slip pivot and to the fixed pivot. A pad is coupled to the slip pivot. An actuator is coupled to the first lobe and to the second lobe.

Abstract: A measurement system for collecting data. The measurement system includes a tubular suspended downhole, the tubular having an outer surface and a flowbore extending therethrough, the flowbore conveying a fluid, a first recess formed in the outer surface of the tubular, a first detection system mounted in the first recess, a second recess formed in the outer surface of the tubular, and a second detection system mounted in the second recess. The second recess is offset relative to the first recess by at least one of an axial distance and a circumferential distance. The first detection system is operable to measure a portion of the data, and the second detection system operable to measure another portion of the data.

Abstract: Disclosed is an apparatus for obtaining a plurality of fluid samples in a subterranean well includes a carrier, a plurality of sampling chambers and a plurality of pressure sources. The sampling chambers and pressure sources substantially comprises non-metallic materials. One or more of the following: conductors, transducers, power sources, communicators, data memory and processors are embedded in the materials comprising the sampler apparatus. One or more transducers for measuring the temperature, pressure, and volume of the sample are present in at least one of the plurality of sampling chambers. Means for measuring the parameters of the wellbore fluid are also present in the sampler apparatus. Means for communicating measured data to the surface are provided in the sampling apparatus.

Abstract: The present disclosure relates to a logging sensor or tool including a structural component, a non-structural component, and a composite disposed between the structural component and the non-structural component. The composite may contain a metallic foam having pores and an elastomeric material deposited in the pores. The elastomeric material may include an elastomer and a plurality of metallic shield particles. The disclosure further relates to a logging system and to a wireline system containing such a logging sensor or tool.