Abstract: Systems and methods for augmented-reality tutoring can utilize optical character recognition, natural language processing, and/or augmented-reality rendering for providing real-time notifications for completing a determined task. The systems and methods can include utilizing one or more machine-learned models trained for quantitative reasoning and can include providing a plurality of different user interface elements at different times.

Abstract: A method for floating gas lift includes injecting natural gas from a FSRU into an annulus of an oil well, wherein the FSRU is fluidly coupled to the oil well, and the natural gas is pressurized for gas lift using at least one pump onboard the FSRU. An apparatus for floating gas lift includes a FSRU including a pump system having a high pressure (HP) LNG discharge and a regasification system including HP gaseous natural gas discharge fluidly coupled to an annulus of a downhole well, and production tubing that lifts a combined production fluid, the combined production fluid including downhole formation fluid entering the inside of the production tubing through perforations in the well casing and a production tubing inlet, and gaseous natural gas discharged from the FSRU entering the inside of the production tubing through the annulus and a valve in the production tubing.

Abstract: An apparatus, system and method for reliquefaction of previously regasified LNG are described. A natural gas reliquefaction method includes regasifying LNG onboard a FSRU to form high pressure regasified LNG (HP RLNG), delivering the HP RLNG to a natural gas pipeline that commingles with a natural gas grid, flowing the HP RLNG through a lateral, wherein the lateral diverts HP RLNG from the natural gas pipeline to an expander prior to commingling with the natural gas grid, expanding the natural gas with the expander to obtain low pressure regasified LNG (LP RLNG), liquefying the LP RLNG in a cold box of a nitrogen expansion loop to produce low pressure LNG, and transmitting the LNG to a cryogenic cargo tank onboard an LNG tanker truck.

Abstract: A method for floating gas lift includes injecting natural gas from a FSRU into an annulus of an oil well, wherein the FSRU is fluidly coupled to the oil well, and the natural gas is pressurized for gas lift using at least one pump onboard the FSRU. An apparatus for floating gas lift includes a FSRU including a pump system having a high pressure (HP) LNG discharge and a regasification system including HP gaseous natural gas discharge fluidly coupled to an annulus of a downhole well, and production tubing that lifts a combined production fluid, the combined production fluid including downhole formation fluid entering the inside of the production tubing through perforations in the well casing and a production tubing inlet, and gaseous natural gas discharged from the FSRU entering the inside of the production tubing through the annulus and a valve in the production tubing.

Abstract: An apparatus, system and method for capture, utilization and sendout of latent heat in boil off gas (“BOG”) onboard a cryogenic storage vessel is described. A liquefied gas vessel comprises a cryogenic cargo tank onboard a liquefied gas vessel, the cargo tank comprising a liquefied gas and a BOG, a latent heat exchanger fluidly coupled to a stream of the liquefied gas and a stream of the BOG, wherein the latent heat exchanger transfers a heat between the BOG stream and the liquefied gas stream to produce a condensed BOG, means for combining the condensed BOG and the liquefied gas stream to obtain a combined stream, the means for combining the condensed BOG and the liquefied gas stream fluidly coupled to the latent heat exchanger, and a liquefied gas regasifier onboard the vessel and fluidly coupled to the combined stream, wherein the liquefied gas regasifier regasifies the combined stream.

Abstract: An apparatus, system and method for capture, utilization and sendout of latent heat in boil off gas (“BOG”) onboard a cryogenic storage vessel is described. A liquefied gas vessel comprises a cryogenic cargo tank onboard a liquefied gas vessel, the cargo tank comprising a liquefied gas and a BOG, a latent heat exchanger fluidly coupled to a stream of the liquefied gas and a stream of the BOG, wherein the latent heat exchanger transfers a heat between the BOG stream and the liquefied gas stream to produce a condensed BOG, means for combining the condensed BOG and the liquefied gas stream to obtain a combined stream, the means for combining the condensed BOG and the liquefied gas stream fluidly coupled to the latent heat exchanger, and a liquefied gas regasifier onboard the vessel and fluidly coupled to the combined stream, wherein the liquefied gas regasifier regasifies the combined stream.

Abstract: An apparatus, system and method for capture, utilization and sendout of latent heat in boil off gas (“BOG”) onboard a cryogenic storage vessel is described. A liquefied gas vessel comprises a cryogenic cargo tank onboard a liquefied gas vessel, the cargo tank comprising a liquefied gas and a BOG, a latent heat exchanger fluidly coupled to a stream of the liquefied gas and a stream of the BOG, wherein the latent heat exchanger transfers a heat between the BOG stream and the liquefied gas stream to produce a condensed BOG, means for combining the condensed BOG and the liquefied gas stream to obtain a combined stream, the means for combining the condensed BOG and the liquefied gas stream fluidly coupled to the latent heat exchanger, and a liquefied gas regasifier onboard the vessel and fluidly coupled to the combined stream, wherein the liquefied gas regasifier regasifies the combined stream.

Abstract: A natural gas liquefaction vessel including an increased deadweight tonnage, as compared to a liquefied natural gas carrier (LNGC) of a comparably-sized ship, is achieved by reducing the LNGC's cargo capacity. This difference creates room on the port and starboard sides of cargo tanks to increase the size of the adjacent wing tanks. The increased size of the wing tanks occupy the space created by the reduced cargo tank size of the vessel and may support a larger upper trunk deck. The ballast wing tanks and smaller cargo tanks increase the deadweight available. With this approach, the larger upper trunk deck of the vessel is able to support an efficient floating liquefaction plant that improves the LNG value chain because it is capable of producing 2.0-3.0 MTPA in the footprint of a standard vessel hull, such as for example a Q-Max hull.

Abstract: An apparatus, system and method for capture, utilization and sendout of latent heat in boil off gas (“BOG”) onboard a cryogenic storage vessel is described. A liquefied gas vessel comprises a cryogenic cargo tank onboard a liquefied gas vessel, the cargo tank comprising a liquefied gas and a BOG, a latent heat exchanger fluidly coupled to a stream of the liquefied gas and a stream of the BOG, wherein the latent heat exchanger transfers a heat between the BOG stream and the liquefied gas stream to produce a condensed BOG, means for combining the condensed BOG and the liquefied gas stream to obtain a combined stream, the means for combining the condensed BOG and the liquefied gas stream fluidly coupled to the latent heat exchanger, and a liquefied gas regasifier onboard the vessel and fluidly coupled to the combined stream, wherein the liquefied gas regasifier regasifies the combined stream.

Abstract: A tubular connection, method for connecting tubulars, and a coupler for connecting together tubulars, of which the tubular connection includes an inner body including a bore, external threads, a tapered torque nose, and a radially-facing sealing surface. The connection also includes an outer body including a bore in communication with the bore of the inner body, internal threads configured to engage the external threads of the inner body, a tapered torque-stop surface that engages the tapered torque nose, and a radially-facing sealing surface that forms a seal with the radially-facing sealing surface of the inner body. The external threads, the internal threads, or both include at least one kick-out feature including at least one rounded or chamfered corner thereof.

Abstract: A tubular connection, method for connecting tubulars, and a coupler for connecting together tubulars, of which the tubular connection includes an inner body including a bore, external threads, a tapered torque nose, and a radially-facing sealing surface. The connection also includes an outer body including a bore in communication with the bore of the inner body, internal threads configured to engage the external threads of the inner body, a tapered torque-stop surface that engages the tapered torque nose, and a radially-facing sealing surface that forms a seal with the radially-facing sealing surface of the inner body. The external threads, the internal threads, or both include at least one kick-out feature including at least one rounded or chamfered corner thereof.

Abstract: A tubular connection, method for connecting tubulars, and a coupler for connecting together tubulars, of which the tubular connection includes an inner body including a bore, external threads, a tapered torque nose, and a radially-facing sealing surface. The connection also includes an outer body including a bore in communication with the bore of the inner body, internal threads configured to engage the external threads of the inner body, a tapered torque-stop surface that engages the tapered torque nose, and a radially-facing sealing surface that forms a seal with the radially-facing sealing surface of the inner body. The external threads, the internal threads, or both include at least one kick-out feature including at least one rounded or chamfered corner thereof.

Abstract: An apparatus, system and method for capture, utilization and sendout of latent heat in boil off gas (“BOG”) onboard a cryogenic storage vessel is described. A liquefied gas vessel comprises a cryogenic cargo tank onboard a liquefied gas vessel, the cargo tank comprising a liquefied gas and a BOG, a latent heat exchanger fluidly coupled to a stream of the liquefied gas and a stream of the BOG, wherein the latent heat exchanger transfers a heat between the BOG stream and the liquefied gas stream to produce a condensed BOG, means for combining the condensed BOG and the liquefied gas stream to obtain a combined stream, the means for combining the condensed BOG and the liquefied gas stream fluidly coupled to the latent heat exchanger, and a liquefied gas regasifier onboard the vessel and fluidly coupled to the combined stream, wherein the liquefied gas regasifier regasifies the combined stream.

Abstract: A constant edge-rate ternary output consecutive-edge modulator (CEM) method and apparatus provides improved dynamic range in a noise-shaped CEM ternary pulse generator. A noise shaper shapes an input signal that is supplied to a pair of CEMs through a mismatch shaper or other code splitter that assigns unequal pulse width portions (the extra count in odd counts) between the pair of CEMs. The range of pulse width out of the CEMs can then be allowed to extend to the full sample period for one or possibly both of the CEMs in a given cycle. A control circuit overrides the mismatch shaper's assignment of the unequal pulse width portions when a previous pulse period yielded no transition from a given CEM, so that the given CEM is guaranteed to have a transition in the current pulse period.

Abstract: A method and apparatus for reducing noise in a digital-to-analog converter (DAC) having a chopper amplifier output stage provides improved DAC performance. A switched-current output provided from a digital filter is coupled to the input of a chopper amplifier. The current switches are non-uniform, so that extra zeros are provided at the chopping frequency of the chopping amplifier, thereby reducing noise that would otherwise be aliased in-band at the output of the chopper amplifier. The current switches may include a first set of half-magnitude switches followed by a set of full-magnitude switches and finally by another set of half-magnitude switches having a size equal to that of the first set.

Abstract: A centered-pulse consecutive edge modulation (CEM) method and apparatus provides a pulse output that advantageously exploits the full edge update rate of the CEM while providing substantially centered pulses. The method and apparatus also operate without substantial delay in the input control path. The apparatus includes a delta-sigma noise shaping modulator followed by a CEM that receives an output of the delta-sigma modulator quantizer. A non-linear correction signal is applied with polarity alternating at each edge and is applied to the quantizer input or is designed into the quantizer transfer function. The non-linear correction signal compensates for the noise-shaping modulator output such that the expected rising edge and falling edge widths of the CEM output pulses are substantially equal with respect to a DC input to the delta-sigma modulator.

Abstract: A method of performing digital to analog conversion includes generating a pulse width modulated data stream and another pulse width modulated data stream, encoding patterns of the pulse width modulated data stream selected to minimize distortion in the another pulse width modulated stream caused by edges in the pulse width modulated data stream. The pulse width modulated data stream and the another pulse width modulated data stream are converted into an analog signal and another analog signal converting in corresponding digital to analog conversion elements and the analog signal and the another analog signal are summed to generate an analog output signal.

Abstract: Methods and apparatus are provided for receiving DSD data in phase modulation mode using a single clock signal. Either the bit clock or phase signal may be used.

Abstract: A method of operating a delta-sigma modulator by providing a variable-level quantizer, which selectively enables an additional quantizer level(s) during a ramp up sequence of the modulator. The additional quantizer level(s) is/are disabled during normal operation. The quantizer truncates a summer output and selectively enables the additional quantizer levels by clipping the truncated sum within a first range of quantizer levels during the ramp up sequence and within a second range of quantizer levels during normal operation in which there are more quantizer levels in the first range than in the second range. The quantizer preferably enables at least two additional quantizer levels at a low end of the quantizer range. For example, the range of quantizer levels for normal operation of the modulator can be from ?6 to +6, while the range of quantizer levels for ramp up operation of the modulator can be from ?8 to +7.

Abstract: A pulse width modulator includes at least one input for receiving an input signal and pulse width modulation circuitry for generating a pulse width modulated stream and another pulse width modulated stream. The pulse width modulated stream and the another pulse width modulated stream are nominally out of phase and together represent the received input signal. A summer sums the pulse width modulated stream and the another pulse width modulated stream to generate an analog output signal.