Abstract: A system for drilling a borehole into the earth's subsurface includes a drill bit configured to rotate and penetrate through the earth's subsurface, and a vibration isolation device configured to isolate vibration that is caused at the drill bit, the vibration having an amplitude. The amplitude of the vibration downhole of the vibration isolation device is at least 20% higher than the amplitude of the vibration uphole of the vibration isolation device.

Abstract: An embodiment of a fluid bypass apparatus includes an axially elongated body configured to be deployed in a borehole in an earth formation, the body including a pilot conduit that allows fluid to flow through the body and a bypass conduit extending from the pilot conduit to an exterior of the body and defining a fluid flow path from the primary conduit to the exterior of the body, The apparatus also includes a modular valve insert housed within the bypass conduit, the valve insert being removable and replaceable, the modular valve insert configured to obstruct the fluid flow path and configured to automatically open in response to a pressure or flow rate through the primary conduit meeting or exceeding a selected threshold pressure or flow rate.

Abstract: Reservoir properties can be received. A plurality of potential well trajectories can be determined. Each trajectory can characterize an extension of the well from a well origin position. Each trajectory can include a plurality of well segments. Production contribution of each potential well trajectory can be evaluated using the reservoir properties. A final well trajectory can be provided based on the evaluated production contribution of the potential well trajectories. Related apparatus, systems, techniques and articles are also described.

Abstract: A downhole barrier having a component thereof comprising a spalling material.

Abstract: A tubing pressure insensitive failsafe wireline retrievable safety valve including a tool housing, a flow tube disposed within the tool housing, an actuation piston disposed in the tool housing and operably connected to the flow tube, the actuation piston having an actuation pressure side and a relatively lower pressure chamber side, a fluid pathway between a potential leak site for the valve and the relatively lower pressure chamber side of the piston. A borehole system having a tubing pressure insensitive failsafe wireline retrievable safety valve. A tubing pressure insensitive failsafe wireline retrievable safety valve.

Abstract: A method and apparatus for predicting a formation parameter at a drill bit drilling a formation is disclosed. A vibration measurement is obtained at each of a plurality of depths in the borehole. A formation parameter is obtained proximate each of the plurality of depths in the borehole. A relationship is determined between the obtained vibration measurements and the measured formation parameters at the plurality of depths. A vibration measurement at a new drill bit location is obtained and the formation parameter at the new drill bit location is predicted from the vibration measurement and the determined relation. Formation type can be determined at the new drill bit location from the new vibration measurement and the determined relationship.

Abstract: A gas detector sensor node includes a first sensor conductor having a terminal end, a second sensor conductor including an end section, and a coupler joining the terminal end of the first sensor conductor with the end section of the second sensor conductor. The coupler is permeable to gas.

Abstract: An example system for optimal storage of load data for lifetime prediction for a piece of equipment used in a well operation includes a sensor collecting load data of the piece of equipment and a processing device for executing computer readable instructions. The computer readable instructions include: determining a lifetime model for the piece of equipment; calculating a bucket size using one of the lifetime model and a distribution of load data; discretizing a load data spectrum into one or more buckets using the calculated bucket size; assigning the collected load data to the one or more buckets of the load data spectrum; storing the collected load data assigned to the one or more buckets to a memory; and determining a lifetime estimation of the piece of equipment based on the load data assigned to the one or more buckets of the load data spectrum and stored to the memory.

Abstract: An apparatus for generating power includes a fluid chamber configured to receive borehole fluid, one or more conductive coils surrounding the fluid chamber, a reciprocating magnetic shuttle disposed in the fluid chamber and dividing the fluid chamber into a first volume and a second volume, a first conduit connected to the first volume, and a second conduit connected to the second volume, the first conduit and the second conduit extending from a tubular conduit to an annulus. The apparatus includes a switching assembly configured to alternate between a first operating state where the first volume is in fluid communication with the annulus and a second operating state where the first volume is in fluid communication with the tubular conduit, to alternate a direction of differential pressure between the first volume and the second volume and cause the magnetic shuttle to move in a reciprocating motion and generate an electric current.

Abstract: Systems and methods for vibration attenuation, and for investigating a subsurface volume of interest from a borehole. System embodiments may include a vibration attenuation system, comprising: at least one vibration attenuator configured to dynamically isolate a vibration source, the at least one vibration attenuator comprising metamaterial defining a plurality of cells; wherein at least one cell of the plurality of cells comprises a plurality of sub-cells azimuthally arrayed about an axis of alignment, and at least one sub-cell of the plurality is defined by a solid, the at least one sub-cell including a plurality of cell segments substantially oriented in alignment with a mapping geometry comprising an inversion of a canonical tangent circles mapping. The vibration source may comprise an acoustic source. The system may have an enclosure having the acoustic source and the at least one receiver disposed therein, with the at least one acoustic attenuator is positioned between.

Abstract: Systems, tools, and methods for optimizing fracturing schedules located along a horizontal wellbore include obtaining drilling cuttings during a drilling operation representative of a predetermined interval of the horizontal wellbore, performing at least one analytical process on the obtained drilling cuttings to determine at least one geomechanical property of the interval of the obtained drilling cuttings for the interval, generating a formation analysis estimation for the interval from the, wherein the formation analysis estimation comprises at least one of (i) a brittleness of the formation at the interval or (ii) a minimum horizontal stress of the formation at the interval, and based on the formation analysis estimation, at least one of (i) configuring a super-stage for deployment to the interval to perform a fracturing operation or (ii) designing a fracturing schedule to be performed to frac the formation at the interval.

Abstract: Examples of techniques for model-based parameter and state estimation for directional drilling in a wellbore operation are provided. In one example implementation according to aspects of the present disclosure, a computer-implemented method includes receiving, by a processing device, measurement data from the wellbore operation. The method further includes performing, by the processing device, an online estimation of at least one of a parameter to generate an estimated parameter and a state to generate an estimated state, the online estimation based at least in part on the measurement data. The method further includes generating, by the processing device, a control input to control an aspect in the wellbore operation based at least in part on the at least one of the estimated parameter and the estimated state. The method further includes executing a control action based on the control input to control the aspect of the wellbore operation.

Abstract: Embodiments of the present disclosure include a method for fabricating a perforating gun including forming an expendable hollow carrier (EHC) via a drawing process. The method also includes determining a wall thickness of the EHC is above a threshold. The method includes machining a coupling component to at least one end of the EHC. The method further includes installing perforating components within an interior of the EHC.

Abstract: A downhole tool including a valve portion having a valve housing including an inner chamber and an actuation tubular. The actuation tubular includes an outer surface, an inner surface defining a flow path, an upper end, and a lower end. A first spring extends about the outer surface of the actuation tubular between the upper end and the lower end. An actuator portion is detachably connected to the actuation tubular. The actuator portion includes an actuator housing, an actuator member arranged in the actuator housing, and a second spring operatively connected to the actuator member. The actuator member includes a first end portion operatively connected to the first spring and a second end portion. The actuator portion is selected and connected to the downhole tool to establish a selected actuation force through the second spring to compress the first spring causing the actuation tubular to shift within the inner chamber.

Abstract: An apparatus for drilling curved and straight sections of a wellbore is disclosed that in one non-limiting embodiment includes a drilling assembly configured to include a drill bit at an end thereof that can be rotated by a drive in the drilling assembly and by the rotation of the drilling assembly, and wherein the drilling assembly includes: a deflection device that (i) tilts a section of the drilling assembly within a selected plane when the drilling assembly is substantially rotationally stationary to allow drilling of a curved section of the wellbore by rotating the drill bit by the drive; and (ii) straightens the section of the drilling assembly when the drilling assembly is rotated to allow drilling of a straight section of the wellbore.

Abstract: The present discussion relates to the addressing sensor drift issues in virtual flow meter applications. By way of example, in certain implementations: 1) pressure, temperature, or other sensors are prioritized based on one or more evaluation criteria, 2) a determination is made as to whether there are sensor drifts for those sensors with high priority, and 3) sensor readings experiencing drift, such as above a specified or measureable threshold, are compensated. In this manner, virtual flow meter accuracy is maintained over time.

Abstract: Systems, and methods are provided for predicting a cache policy based on application input data. Inputs provided to an application and corresponding to a usage pattern of the application can be received. The inputs can be used with a predictive model to determine a cache policy corresponding to a datastore. The cache policy can include output data to be provided via in the datastore and subsequently provided to a computing device in a just-in-time manner. The predictive model can be trained to output the cache policy based on input data received from a usage point, a provider point, or a datastore configuration.

Abstract: An embodiment of a method of performing aspects of a downhole operation includes receiving a measurement value from a first sensor configured to measure a parameter related to the downhole operation, receiving measurement data from a different sensor, the measurement data related to the downhole operation, and performing, by a sensor evaluation module, an evaluation of the first sensor. The evaluation includes determining a condition of the first sensor based on the measurement data from the different sensor, selecting a rule that prescribes a set of one or more measurement values of the parameter that are plausible if the condition is met, and determining whether the measurement value from the first sensor is plausible based on comparing the measurement value to the prescribed set of one or more measurement values.

Abstract: An embodiment of a communication system for communicating between a wired pipe string in a borehole and a surface location includes at least a first wired pipe downhole component and a second wired pipe downhole component in the wired pipe string, a coupler configured to transmit a transmission signal between the first wired pipe downhole component and the second wired pipe downhole component, and a wireless transmission assembly in at least one of the first wired pipe downhole component and the second wired pipe downhole component. The wireless transmission assembly is configured to wirelessly transmit a wireless transmission signal to a receiver antenna, and the receiver antenna is disposed at the surface location and configured to receive the wireless transmission signal.

Abstract: A seal assembly for downhole use that includes a sealing ring, and a backup ring set generally coaxial with and adjacent to the sealing ring. A height of the backup ring exceeds a diameter of the sealing ring; and is disposed on a low pressure side of the seal assembly to prevent the sealing ring from extruding into the low pressure side. The backup ring is made of a core and a coating on the core. Material properties of the coating are generally unaffected when exposed to downhole conditions, and the coating prevents diffusion of fluid or gas molecules into the low pressure side.