Abstract: The present disclosure discloses an image encryption method comprising: acquiring a row encryption sequence and a column encryption sequence, and acquiring, from a pixel array component of a sensor, pixel rows corresponding to the respective elements of the row encryption sequence; encrypting and sorting pixels in each of the pixel rows by using the column encryption sequence to obtain encrypted pixel rows corresponding to the respective pixel rows; and arranging the encrypted pixel rows according to a preset arrangement order to obtain an encrypted image. The method may perform encryption when generating an original image to obtain an encrypted image. In addition, the present disclosure also provides an image encryption apparatus, a sensor, and a computer readable storage medium, which also have the above-mentioned beneficial effects.

Abstract: The present disclosure discloses a video encryption method comprising: acquiring image frames continuously by using an image acquisition component, and storing the image frames into a frame buffer; acquiring a time encryption sequence, and using the time encryption sequence to obtain an address encryption sequence; and reading each of the image frames in the frame buffer according to the address encryption sequence to obtain an encrypted video when the frame buffer is full. The method continuously acquires the image frames and uses the time encryption sequence to obtain the address encryption sequence, and when the frame buffer is full, each of the image frames in the frame buffer is read according to the address encryption sequence to obtain an encrypted video. In addition, the present disclosure also provides a video encryption apparatus, an image capture device, and a computer readable storage medium, which also have the above-mentioned beneficial effects.

Abstract: A drilling bottom hole assembly for loss circulation mitigation includes a drill bit configured to drill a wellbore in a formation. The drill bit is attached to a drill string. The wellbore includes a high-loss circulation zone into which drilling fluid is lost during drilling the wellbore. An under reamer is attached to the drill string upstring of the drill bit. The under reamer is downhole of the high-loss circulation zone. The under reamer, in response to actuation, is configured to widen a diameter of the high-loss circulation zone. An expansion assembly is connected to the under reamer. The expansion assembly surrounds the drill string upstring of the under reamer. The expansion assembly is configured to cover the high-loss circulation zone after the diameter of the high-loss circulation zone is widened by the under reamer.

Abstract: The present invention discloses an expandable liner hanger system comprising a central pipe and an expandable pipe, with an expansion cone provided therebetween the central pipe and expandable pipe in a way that the expansion cone is movable along the central pipe, so that the expandable pipe is expanded; wherein, the expansion cone comprises an expansion cone seat move along the central pipe, and an expansion cone sleeve fitted over the expansion cone seat, the connection between the expansion cone seat and the expansion cone sleeve is configured in a way that the expansion cone sleeve can move upward together with the expansion cone seat along the central pipe so that the expandable pipe is expanded, and the central pipe can drive the expansion cone seat to disengage from the expansion cone sleeve.

Abstract: The present disclosure discloses a metamaterial based metal gate MOSFET detector with gate rasterized, comprising a metamaterial based metal gate MOSFET having a rasterized gate structure and various different grating pattern forms thereof, wherein a gate of the metal gate MOSFET is connected to a first bias resistor and a first bias voltage, a source of the metal gate MOSFET is grounded, a drain of the metal gate MOSFET is connected to a first DC blocking capacitor, the first DC blocking capacitor is connected to a low noise preamplifier, and a second bias resistor and a second bias voltage are connected between the low noise preamplifier and the first DC blocking capacitor. The technical solution according to the present disclosure can completely absorb terahertz waves of a specific frequency band and generate resonance.

Abstract: The present disclosure discloses a dielectric resonant antenna based NMOSFET terahertz detector, comprising an on-chip dielectric resonant terahertz antenna, wherein the on-chip dielectric resonant terahertz antenna is connected to a matching network, the matching network is connected to a source of an NMOSFET, and a gate of the NMOSFET is sequentially connected to a first bias resistor and a first bias voltage, a third transmission line is connected between the first bias resistor and the gate, a drain of the NMOSFET is connected to a first DC blocking capacitor, the other end of the first DC blocking capacitor is connected to a low noise preamplifier, a second bias resistor and a second bias voltage are connected in parallel between the first DC blocking capacitor and the low noise preamplifier, and the low noise preamplifier is further provided with a voltage feedback loop. The present disclosure also discloses a design method for the same.

Abstract: The present invention discloses an expandable liner hanger system comprising a central pipe and an expandable pipe, with an expansion cone provided therebetween the central pipe and expandable pipe in a way that the expansion cone is movable along the central pipe, so that the expandable pipe is expanded; wherein, the expansion cone comprises an expansion cone seat move along the central pipe, and an expansion cone sleeve fitted over the expansion cone seat, the connection between the expansion cone seat and the expansion cone sleeve is configured in a way that the expansion cone sleeve can move upward together with the expansion cone seat along the central pipe so that the expandable pipe is expanded, and the central pipe can drive the expansion cone seat to disengage from the expansion cone sleeve.

Abstract: The present disclosure relates to a communication method related with channel width agile. The method uses a channel generation circuit at a signal transmitting end to generate a channel whose channel width can be changed according to a certain law, and a channel detection circuit at a signal receiving end corresponding thereto to detect the corresponding channel width by the same channel width agile law, thereby achieving the secure reception of the signal. Due to the agility of the channel width, communication security is ensured, and it does not conflict with other technologies (such as frequency hopping), and the channel width can be dynamically allocated. In this way, the advantages of high security, compatibility, and high spectrum utilization can be achieved. Meanwhile, the method realizes the maximum possible optimization of the channel and is very creative.

Abstract: A crossover sub includes a tubular housing connected to a drill string in a wellbore, a sealing structure to seal against a wellbore wall, and a sleeve valve disposed within the housing and movable between a closed position and an open position in response to a fluid pressure in a first flow chamber or second, separate flow chamber of the housing. The first flow chamber fluidly connects an upper annulus of the wellbore to a central bore of the drill string downhole of the crossover sub. The second flow chamber fluidly connects a central bore of the drill string uphole of the sealing structure to a lower annulus of the wellbore. The sleeve valve closes the second flow chamber in response to the sleeve valve being in the closed position, and opens the second flow chamber in response to the sleeve valve being in the open position.

Abstract: The present disclosure discloses a metamaterial based metal gate MOSFET detector with gate rasterized, comprising a metamaterial based metal gate MOSFET having a rasterized gate structure and various different grating pattern forms thereof, wherein a gate of the metal gate MOSFET is connected to a first bias resistor and a first bias voltage, a source of the metal gate MOSFET is grounded, a drain of the metal gate MOSFET is connected to a first DC blocking capacitor, the first DC blocking capacitor is connected to a low noise preamplifier, and a second bias resistor and a second bias voltage are connected between the low noise preamplifier and the first DC blocking capacitor. The technical solution according to the present disclosure can completely absorb terahertz waves of a specific frequency band and generate resonance.

Abstract: The present disclosure discloses a terahertz detector based on a N×M dielectric resonant antenna array, wherein a N×M on-chip dielectric resonant terahertz antenna array is connected to a matching network, the matching network is connected to a source of a NMOSFET, a gate of the NMOSFET is sequentially connected to a first bias resistor and a first bias voltage, a third transmission line is connected between the first bias resistor and the gate, a drain of the NMOSFET is connected to a first DC blocking capacitor, the other end of the first DC blocking capacitor is connected to a low noise preamplifier, a second bias resistor and a second bias voltage are further connected between the first DC blocking capacitor and the low noise preamplifier, and the low noise preamplifier is further provided with a voltage feedback loop. The present disclosure also discloses a design method for the same.

Abstract: The present disclosure discloses a dielectric resonant antenna based NMOSFET terahertz detector, comprising an on-chip dielectric resonant terahertz antenna, wherein the on-chip dielectric resonant terahertz antenna is connected to a matching network, the matching network is connected to a source of an NMOSFET, and a gate of the NMOSFET is sequentially connected to a first bias resistor and a first bias voltage, a third transmission line is connected between the first bias resistor and the gate, a drain of the NMOSFET is connected to a first DC blocking capacitor, the other end of the first DC blocking capacitor is connected to a low noise preamplifier, a second bias resistor and a second bias voltage are connected in parallel between the first DC blocking capacitor and the low noise preamplifier, and the low noise preamplifier is further provided with a voltage feedback loop. The present disclosure also discloses a design method for the same.

Abstract: A method and system for remediating a lost circulation zone in a wellbore. A flexible liner is deployed adjacent the lost circulation zone that blocks fluid communication between the wellbore and surrounding formation. The liner material has a designated yield and tensile strength, so that in response to pressure applied in the wellbore the liner flexes and conforms to contours in the wellbore. The liner remains intact during deformation to maintain the flow barrier between the wellbore and formation. The liner is set in the wellbore with a bottom hole assembly that includes an outer housing for protecting the liner during the trip downhole. Drill pipe can be used for deploying the bottom hole assembly, and for conveying pressurized fluid for setting the liner. An expander is included with the bottom hole assembly for mechanically conforming the liner to the wellbore sidewalls.

Abstract: A crossover sub includes a tubular housing connected to a drill string in a wellbore, a sealing structure to seal against a wellbore wall, and a sleeve valve disposed within the housing and movable between a closed position and an open position in response to a fluid pressure in a first flow chamber or second, separate flow chamber of the housing. The first flow chamber fluidly connects an upper annulus of the wellbore to a central bore of the drill string downhole of the crossover sub. The second flow chamber fluidly connects a central bore of the drill string uphole of the sealing structure to a lower annulus of the wellbore. The sleeve valve closes the second flow chamber in response to the sleeve valve being in the closed position, and opens the second flow chamber in response to the sleeve valve being in the open position.

Abstract: A system for wirelessly monitoring well conditions includes a set of wireless transceivers placed along a drill string inside a well, each transceiver placed within at least half the maximum distance that each transceiver can transmit data, and a power generator attached to each transceiver that powers the respective transceiver, the power generator including a first material that is of one polarity and a second material that is fixed in position and is of opposite polarity of the first material, wherein the first material is propelled toward the second material based on the motion of the power generator so that the two materials have a maximized point of contact to generate maximum power. The wireless transceivers may communicate using any wireless communication technology, including but not limited to Wi-Fi, Wi-Fi Direct, and BLE.

Abstract: A system includes at least one hardware processor interoperably coupled with computer memory and configured to perform operations of one or more components of the computer-implemented system. The system includes a detachable module (DM) delivery system configured to deploy, from release grooves of the NRSS and during a survey of the NRSS inside a wellbore during drilling of a well, plural DMs into an environment surrounding the NRSS, wherein the plural DMs are pre-loaded into the NRSS, and plural DMs are configured to gather and store sensing data from the environment.

Abstract: A system for wirelessly monitoring well conditions includes a set of wireless transceivers placed along a drill string inside a well, each transceiver placed within at least half the maximum distance that each transceiver can transmit data, and a power generator attached to each transceiver that powers the respective transceiver, the power generator including a first material that is of one polarity and a second material that is fixed in position and is of opposite polarity of the first material, wherein the first material is propelled toward the second material based on the motion of the power generator so that the two materials have a maximized point of contact to generate maximum power. The wireless transceivers may communicate using any wireless communication technology, including but not limited to Wi-Fi, Wi-Fi Direct, and BLE.

Abstract: A system includes at least one hardware processor interoperably coupled with computer memory and configured to perform operations of one or more components of the computer-implemented system. The system includes a detachable module (DM) delivery system configured to deploy, from release grooves of the NRSS and during a survey of the NRSS inside a wellbore during drilling of a well, plural DMs into an environment surrounding the NRSS, wherein the plural DMs are pre-loaded into the NRSS, and plural DMs are configured to gather and store sensing data from the environment.

Abstract: The present disclosure discloses a multi-mode and low-energy indoor thermal conditioning method, which utilizes various indoor thermal conditioning means to form a plurality of thermal conditioning schemes, and then performs offline prediction on indoor thermal environment parameters in each mode, establishes an input/output database according to a human comfort model, optimizes a current optimal adjustment mode in real time through system identification, and can update the input/output database according to user feedback.

Abstract: A liner assembly tool includes a base tubular that includes a bore therethrough; a wellbore liner that includes a liner top and is coupled to the base tubular; a pack-off element radially positioned between the base tubular and the wellbore liner to ride on the base tubular; and a wedge positioned to ride on the base tubular and expand the pack-off element to at least partially seal the liner top to a wellbore wall based on a particular fluid pressure supplied through the bore.