Patent Application
20220314165
Pipeline and vessel operations frequently require emptying an isolated volume that contains natural gas at high pressure. For example, when pigging operations are completed, the volume of gas left in the pig launcher or receiver needs to be emptied. Other pipeline and vessel operations, such as maintenance, filter replacement, and the like, also require emptying gas from an isolated volume. In many instances, the high pressure gas cannot be directly evacuated back into the adjacent pipeline system, which is at an equal or greater pressure. Therefore, a common practice for empty the volume of gas involves either venting the gas to the atmosphere or burning the gas during release through flaring. Understandably, a technique that can recapture the gas from the isolated volume and can reintroduce that recapture gas into the adjacent pipeline system is preferred.
To that end, the subject matter of the present disclosure is directed to overcoming, or at least reducing the effects of, one or more of the problems set forth above.
A system is disclosed herein for recovering a process gas from a first volume at a first pressure to a second volume at an equal or greater pressure. The system comprises:
The gas scrubbing stage further comprises a blowcase connected to a gas scrubber and receiving the collected liquid, the blowcase connected to the process gas as a source pressure boosting the liquid to a liquid outlet.
The gas scrubbing stage further comprises one or more tanks buffering expansion of the process gas from a gas scrubber and draining liquid therefrom to a liquid outlet.
In the system, each of the one or more compression stages comprises a pressure safety valve disposed upstream of the heat exchanger and configured to release the process gas above a pressure threshold to a gas outlet, the pressure threshold for each of the one or more compression stages increasing from one of the compression cycles to the next.
In the system, each of the one or more compression stages comprises a demister disposed downstream from the heat exchanger and configured to remove lubricant oil from the process gas.
A method is disclosed herein for recovering a process gas from a first volume at a first pressure to a second volume at an equal or greater pressure. The method comprises:
In bringing the processes gas down from the first pressure to the initial staged pressure below the first pressure, the method comprises measuring a first temperature of the process gas after being stepped down, reheating the process gas with a heat exchanger based on the first temperature; measuring a second temperature of the process gas after reheating; and verifying the reheating of the process gas based on a comparison between the first and second temperatures.
In bringing the processes gas down from the first pressure to the initial staged pressure below the first pressure, the method comprises measuring a first pressure of the process gas before being stepped down; measuring a second pressure of the process gas after being stepped down; and verifying the stepdown of the process gas based a comparison between the first and second pressures.
In the method, scrubbing the liquid from the process gas at the initial staged pressure comprises communicating the liquid to a blowcase; boosting the liquid from the blowcase using the process gas as a source pressure; and draining the boosted liquid from a liquid outlet.
In the method, stepping the process gas down from the initial staged pressure to the intermediate staged pressure below the initial staged pressure comprises buffering expansion of the process gas in one or more tanks; and draining liquid from the buffered process gas.
In the method, stepping the process gas down from the initial staged pressure to the intermediate staged pressure below the initial staged pressure comprises stepping the process gas down through a pressure control valve between a scrubber and one or more buffer tanks.
In the method, bringing the processes gas up from the intermediate staged pressure to the final staged pressure by stepping the process gas up through one or more compression cycles and cooling the process gas after being compressed comprises:
In the method, compressing the process gas comprises demisting the process gas of lubricant oil after cooling.
In the method, discharging the process gas at the final staged pressure to the second volume comprises collecting the process gas in a discharge vessel; and draining any liquid from the process gas.
In the method, discharging the process gas at the final staged pressure to the second volume comprises communicating the discharge vessel with the scrubber to prime the scrubbing process.
The foregoing summary is not intended to summarize each potential embodiment or every aspect of the present disclosure.
The transfer process performed by the gas transfer system 50 can reduce emission of harmful gases to the atmosphere that may otherwise need to be flared or vented during a conventional blow-down process. In this way, the system 50 and the gas transfer process disclosed herein can reclaim the gas in the source volume (12) and place it in the destination volume (16) while avoiding detrimental environmental effects.
The system 50 includes one or more decompression or regulation stages 60, a gas scrubbing stage 70, one or more compression stages 80, and a discharge stage 90. An inlet of the one or more regulation stages 60 receives the process gas from the source volume (12) at the source pressure. The regulation stages 60 are configured to step down the source pressure to an intermediate pressure. As discussed below, each of the regulation stages 60 includes a pressure regulating device for pressure step down and includes a heat exchanger for reheating the process gas thereafter.
The gas scrubbing stage 70 receives the process gas from the regulation stages 60 and collects liquid from the process gas. To handle the collected liquid, a blowcase 72 can be used so the liquid can be boosted to a liquid drain header 58 having a liquid outlet. The blowcase 72 connected to the gas scrubbing stage 70 receives the collected liquid, and a gas pressure source (not shown) boosts the liquid to the liquid outlet of the header 58. Additionally, a buffer and expansion stage 74 can buffer the expansion of the process gas as part of the scrubbing stage 70 and can allow liquid to drain to the liquid outlet of the liquid drain header 58.
The one or more compression stages 80 receive the process gas from the gas scrubbing stage 70. The stages 80 are configured to step-up the intermediate pressure to a final pressure. Each of the compression stages 80 includes a compression cycle for pressure step-up and includes a heat exchanger for cooling the process gas thereafter. In each of the compression stages 80, a pressure control valve can be configured to release the process gas above a pressure threshold to a gas header 54. The pressure threshold for each of the compression stages 80 increases from one compression cycle to the next. In the compression stages 80, a demister can be used to remove lubricant oil for the compression from the process gas.
The discharge stage 90 receives the process gas from the one or more compression stages 80 and is configured to discharge the process gas at the final pressure to the second volume (16). The final pressure is at or above the pressure of the destination volume (16). If necessary, the discharge stage 90 can also be used to discharge any collected liquid to the liquid drain header 58. In general, depending on the implementation, the system 50 may or may not include the blowcase 72 and the buffering and expansion stage 74.
As shown in
In the example of
As shown in a simplified way, the piping system 20 has a mainline 22 with a bypass valve 24 connecting to a flow tee 26. During normal operations, main flow of the process gas from the mainline 22 can pass on to a continuing mainline 28. The pigging system 30 includes a bypass or kick line 32 having a valve 34. The line 32 connects from the mainline 22 to a pig launcher 40, which includes a housing for pigs and includes various outlets, inlets, sensors, and the like. A pup joint 42 connected in line from the pig launcher 40 has a valve 44 and connects to the flow tee 26 for introducing pigs into the continuing mainline 28.
During pigging operations, the kick line 32 of the pigging system 30 feeds process gas to the launch barrel (volume 12) of the launcher 40 in which the pigs (not shown) are housed. The kicker valve 34 on the kick line 32 controls the feed of the process gas from the mainline 22 to the launcher 40. Once launched, the pig(s) pass along the pup line 42 to the continuing mainline 28 at the flow tee 26. The isolation valve 44 provided on this pup line 42 is open to allow communication of the pig(s). As will be appreciated, the pigging system 30 can include a number of additional components (not shown), such as pressurizing line, a drain line, a relief valve, a purge connection, a vent connection, a tell-tale valve, pig bars, gauges, etc.
After the pigging operations, the pig launcher 40 is isolated from the mainline 22, 28 by closing the valves 34, 44. This leaves high pressure process gas in the volume (12) of the pig launcher 40. To reclaim this process gas and reintroduce it into the piping system 20, operators connect the gas transfer system 50 between the pigging system 30 and the piping system 20. In general, the suction line 53 can be connected to an appropriate valve or outlet on the pig launcher 40, and the discharge line 57 can be likewise connected to an appropriate valve or inlet on the piping system 20.
When operated, the gas transfer system 50 begins moving gas from the source (12) to the destination (16). The compression stages (80) of the system 50 discharge the reclaimed gas at a pressure slightly greater than the pressure in the destination volume (16). The process continues until the pressure in the source volume (12) has decreased to a desired level. The pressure in the source volume (12) continually decreases during the process, while the pressure in designation volume (16) may or may not increase depending on the size of the destination volume (16). The process can be manually or automatically controlled. Therefore, a control unit or manual controls 59 may be provided on the unit 55.
Once the gas has been recaptured and discharged, the gas transfer system 50 can be turned off and disconnected for use elsewhere as needed. As will be appreciated, the system 50 can be comparably used for a pig receiver. A number of other uses include operations in which maintenance of transmission, distribution, or gathering lines is performed or in which trenchless rehabilitation is performed. Additionally, the system 50 can be used for hot tap tie-ins; line abandonment, repair, or replacement; process vessel maintenance; filter replacement; etc.
In the system 100, a suction inlet 102 connects to the source volume (12), and a compressor outlet 106 connects to the destination volume (16). Again, the source volume (12) can be a pig launcher/receiver, and the destination volume (16) can be part of the associated piping system. As before, the system 100 uses one or more decompression or regulation stages 120A-B to step down the inlet pressure from the source volume (12) to a low pressure. These stages 120A-B drop the pressure of the process gas and reheat the process gas thereafter. As discussed below, pressure regulating devices and heat exchangers are used in these stages 120A-B to regulate the pressure and temperature of the process gas.
After the pressure drop and reheating during the regulation stages 120A-B, the process gas enters a scrubbing stage 130, which has a scrubber 131, a blowcase 136, and tanks 138a-b. The scrubber 131, the blowcase 136, and the tanks 138A-B can collect liquid for delivery to a liquid drain header 152.
From the scrubbing stage 130, the process gas at the reduced pressure then undergoes one or more compression cycles 142A-D of a compression stage 140. In general, the compression stage 140 can be provided by a single stage compressor, a number of signal stage compressors connected in series, or a multistage compressor 140 or other compressor equipment. The compressor(s) for the stage 140 can be driven by an electric motor, engine, or the like. For its part, the engine can operate using any suitable and available fuel. The volumes (12, 16) can be at any pressure within the performance capability of the compressor 140.
The compression stage 140 increases the pressure of the process gas to a final pressure suited for outlet to the destination volume (16). Various pressure safety valves (PSV) of the gas transfer system 100 can connect to a pressure safety valve header 150 to expel gas that is at excess pressures for venting, flaring, or the like. Various bypass valves (BV), control valves (CV), temperature sensors, pressure sensors, and other equipment are used through the system 100 as discussed below. Eventually, the process gas at the final pressure can be discharged by the discharge stage 160 from the outlet 106.
The gas transfer system 100 commences when the compression cycles 142A-D of the compressor stage 140 are started and begin to withdraw gas, initially at high pressure, from the source (12) into the inlet 102. Because the gas is initially at high pressure, the gas is regulated down in one or two regulation steps of the regulation stages 120A-B using pressure regulators 122, which are properly sized for the pressures. Depending on the pressure drop associated with the pressure regulation, the gas temperature may decrease. In cases of significant pressure regulation, the gas temperature may decrease from ambient temperature to below 0° F.
Therefore, a heat exchanger 124, such as an electric-to-gas heat exchanger or an engine coolant-to-gas heat exchanger, can be utilized to increase the process gas temperature into a range suitable for the next step of pressure regulation (if necessary), or suitable for the compressor inlet. Bypass valves (BV) can be provided on bypass lines to circumvent the pressure regulators 122 when the pressure in the source (12) or the pressure between pressure regulation stages 120A-B decreases to an acceptable level. Various types of pressure regulators 122 can be used to produce the pressure drop.
Looking more closely in this example, the suction inlet 102 communicates process gas to one or more regulation stages 120A-B, each having a pressure control valve 122a-b and a heat exchanger 124a-b. As shown in this example, a first regulation stage 120A has a first pressure control valve 122a and has a first heat exchanger 124a to provide a first stage of regulation and reheating, and a second regulation stage 120B has a second pressure control valve 122b and a second heat exchanger 124b to provide a second stage of regulation and reheating. A number of pressure control valves 122a-b can be used, such as valves for high pressure relief, unloading, and decompression.
Pressure and temperatures sensors (P & T) can be used to monitor the pressure regulation and reheating in the stages 120A-B. For example, a temperature sensor (T) can measure the temperature of the gas after the respective pressure control valve 122a-b to determine what heating may be needed for the gas by the heat exchanger 124a-b after the pressure regulation. Additionally, a temperature sensor (T) can also measure the temperature after the respective heat exchanger 124a-b to verify the temperature of the gas after heating. Moreover, pressure sensors (P) can measure the pressure of the gas before and after regulation to determine that a correct pressure has been reached and to determine whether any further regulation is needed depending on the circumstances.
As will be appreciated, one or more of the regulation stages 120A-B can be used by operating various bypass valves (BV) on bypass lines to meet the requirements of an implementation. In one particular configuration, the first regulation stage 120A can be configured to drop input pressure of 1440-psig down to 500-psig, and a second regulation stage 120B can be configured to drop input pressure of 500-psig down to 60-psig. The various bypass valves (BV) can be controlled to isolate one or more of the regulation stages 120A-B. The heater exchangers 124a-b can be electric-to-gas heat exchangers, although other types of heat exchangers can be used.
After the pressure regulation and reheating in the stages 120A-B, the gas having been heated enters the scrubbing stage 130 where any liquids are collected. These liquids may gravitationally drop out or may be removed by a vane pack, mist extractor, or any other suitable scrubbing arrangement. As shown here, the process gas enters an inlet 132 of the gas scrubber 131. In general, the gas scrubber 131 can be a vessel to remove traces of liquid from the process gas that may have condensed in the process gas so that liquid is kept from the compression stages 142A-D of the compressor 140. Various sensors, such as level sensor or switch (LS) and level control valve (LCV), measure and regulate the liquid dropped out of the process gas in the scrubber 131.
The liquid from the vessel 131 can be fed by a liquid line 134b having a safety valve (SV) and control valve (CV) to a blowcase 136. The blowcase 136 is used for collecting the gravity fed liquid at low pressure from the gas scrubber 131, and the higher pressure of the process gas from the blowcase pressure source 135 is used to boost the liquid to the liquid drain header 152 without the need for pumping.
The blowcase 136 can have a pressure safety valve 137, which connects to a pressure safety valve header 150 of the system 100—to which a number of other pressure safety valves of the system 100 also connect. For instance, the scrubber 131 can also have a pressure safety valve 133 that connects to the header 150 for venting to a gas outlet 104b at a skid's edge.
The blowcase 136 also connects to a liquid drain header 152 using a bypass valve (BV). The liquid drain header 152 can connect to a liquid outlet 104a at the skid's edge. For the blowcase 136 to function, a source pressure (i.e., 60-psig) can be provided to the blowcase 136 by the process gas from tubing for the blowcase pressure source 135 connected to the output of the regulation stages 120A-B.
At a gas outlet 134a of the gas scrubber 131, the process gas passes a pressure sensor (P) to an additional pressure control valve (PCV) 120C that can further regulate the pressure down, such as from 60-psig to 5-psig. A buffer tank 138a receives this low pressure process gas, and an expansion tank 138b connected to the buffer tank 138a can be used to collect any liquid from the low pressure process gas for passage to the liquid drain header 152 of the system 100. The system 100 is expected to produce only small amounts of liquid drop out.
The process gas, now appreciably void of liquid droplets and at an appropriately controlled temperature and pressure, enters and traverses through the one or more compression cycles 142A-D of the compression stage 140, which can be part of a single-stage or a multi-stage compressor. For example, a continuous duty direct-drive booster compressor with gas conditioning system can be used for the stage 140.
From the buffer tank 138a, for example, the low pressure process gas can pass to the one or more compression stage cycles 142A-D provided by the compressor of the stage 140 of the system 100. In this example, four compression stage cycles 142A-D are shown, but more or fewer can be used depending on the implementation. Each compression stage cycle 142A-D increases the pressure of the fed gas by an increasing step-up, and a pressure sensor (P) measures the increased pressure of the gas after compression. A pressure safety valve (PSV) 143 can be provided to discharge gas over a defined pressure to the pressure safety valve header 150. Each cycle 142A-D can be set at increasing pressure thresholds to protect the subsequent cycle 142A-D.
Because the compression of the process gas increases its temperature, an intercooler heat exchanger 144 after the compression stage cycle 142A-D cools the gas before the gas enters into a scrubber or demister stage 146. In the demister stage 146, any lubricant oil for the compressor 140 contained in the process gas can be collected at coalescing filters. Additional compression stage cycles 142B-D can follow the first cycle 142A as needed, and each can be followed by a pressure control valve 143, an intercooler 144, and a demister stage 146.
In the present example, four compression stage cycles 142A-D are shown, with pressure safety valves 143 of increasing pressure ratings, such as 115-psig, 360-psig, 1225-psig, and 5300-psig. Other pressure values can be used depending on the implementation. A final aftercooler 148 can be provided after the last stage cycle 142D. Temperature and pressure sensors monitor the process gas, which then passes to a discharge vessel 161 of the discharge stage 160. A high-pressure shutdown device (SD) and control valve (CV) can be used in the feed of the process gas to the discharge vessel 161.
Any liquid can be discharged to the liquid drain header 152 via a line 164 having a needle valve (NV). A feed 162 can be provided from the discharge vessel 161 to the outlet of the regulation stages 120A-B at a junction before the scrubbing stage 130 for a start bypass. During operation, the start bypass can open during start-up and can open for a short interval (5-sec) every hour or so. This allows the scrubber/demister equipment (e.g., 131, 136, 146) to open for the short interval to dump liquid. Ultimately, the process gas from the discharge vessel 161 can pass to the system outlet 106, which is connected to the destination volume for the process gas.
As noted above, certain features of the scrubbing stage 130 and discharge stage 160 may or may not be used or necessary depending on the implementation.
In the system 100, a suction inlet 102 connects to the source volume (12), and a compressor outlet 106 connects to the destination volume (16). Again, the source volume (12) can be a pig launcher/receiver, and the destination volume (16) can be part of the associated piping system. As before, the system 100 uses one or more decompression or regulation stages 120A-B to step down the inlet pressure from the source volume (12) to a low pressure. These stages 120A-B drop the pressure of the process gas and reheats the process gas thereafter. As discussed below, pressure regulating devices and heat exchangers are used in these stages 120A-B to regulate the pressure and temperature of the process gas.
After the pressure drop and reheating during the regulation stages 120A-B, the process gas enters the scrubbing stage 130, which has a scrubber 131 to collect liquid for delivery to a liquid drain header 152.
From the scrubbing stage 130, the process gas at the reduced pressure then undergoes compression using one or both redundant compression stages 140A-B. Each of the compression stages 140A-B can use a multistage compressor, and the two multistage compressors of the stages 140A-B can be connected in parallel to provide redundant or alternate capacity for the system 100. Further details of the compression stages 140A-B are shown in
As before, the compression stages 140A-B increase the pressure of the process gas to a final pressure suited for outlet to the destination volume (16). Various pressure safety valves (PSV) of the system 100 can connect to a pressure safety valve header 150 to expel gas that is at excess pressures for venting, flaring, or the like. Various bypass valves (BV), control valves (CV), temperature sensors, pressure sensors, and other equipment are used through the system 100 as discussed below. Eventually, the process gas from gas lines 149 at the final pressure can be discharged by the discharge stage 160 from the outlet 106.
As before, the gas transfer system 100 commences when the compression cycles of one or both the compression stages 140A-B are started and begin to withdraw gas, initially at high pressure, from the source (12) into the inlet 102. Because the gas is initially at high pressure, the gas is regulated down in one or two regulation steps of the regulation stages 120A-B using pressure regulators 122, which are properly sized for the pressures. Depending on the pressure drop associated with the pressure regulation, the gas temperature may decrease. In cases of significant pressure regulation, the gas temperature may decrease from ambient temperature to below 0° F. Therefore, a heat exchanger 124, such as an electric-to-gas heat exchanger or an engine coolant-to-gas heat exchanger, can be utilized to increase the process gas temperature into a range suitable for the next step of pressure regulation (if necessary), or suitable for the compressor inlet. Bypass valves (BV) can be provided on bypass lines to circumvent the pressure regulators 122 when the pressure in the source (12) or the pressure between pressure regulation stages 120A-B decreases to an acceptable level. Various types of pressure regulators 122 can be used to produce the pressure drop.
Looking more closely in this example, the suction inlet 102 communicates process gas to one or more regulation stages 120A-B, each having a pressure control valve 122a-b and a heat exchanger 124a-b. As shown in this example, a first regulation stage 120A has a first pressure control valve 122a and has a first heat exchanger 124a to provide a first stage of regulation and reheating, and a second regulation stage 120B has a second pressure control valve 122b and a second heat exchanger 124b to provide a second stage of regulation and reheating. A number of pressure control valves 122a-b can be used, such as valves for high pressure relief, unloading, and decompression.
Pressure and temperatures sensors (P & T) can be used to monitor the pressure regulation and reheating in the stages 120A-B. For example, a temperature sensor (T) can measure the temperature of the gas after the respective pressure control valve 122a-b to determine what heating may be needed for the gas by the heat exchanger 124a-b after the pressure regulation. Additionally, a temperature sensor (T) can also measure the temperature after the respective heat exchanger 124a-b to verify the temperature of the gas after heating. Moreover, pressure sensors (P) can measure the pressure of the gas before and after regulation to determine that a correct pressure has been reached and to determine whether any further regulation is needed depending on the circumstances.
As will be appreciated, one or more of the regulation stages 120A-B can be used by operating various bypass valves (BV) on bypass lines to meet the requirements of an implementation. In one particular configuration, the first regulation stage 120A can be configured to drop input pressure of 1440-psig down to 500-psig, and a second regulation stage 120B can be configured to drop input pressure of 500-psig down to 60-psig. The various bypass valves (BV) can be controlled to isolate one or more of the regulation stages 120A-B. The heater exchangers 124a-b can be electric-to-gas heat exchangers, although other types of heat exchangers can be used.
After the pressure regulation and reheating in the stages 120A-B, the gas having been heated can pass through a final pressure control valve 120C to regulate the pressure down a final step, such as from 60-psig to 5-psig. The low pressure gas then enters the scrubbing stage 130 where any liquids are collected. These liquids may gravitationally drop out or may be removed by a vane pack, mist extractor, or any other suitable scrubbing arrangement. As shown here, from the pressure control valve 120C, the process gas enters an inlet 132 of the scrubber 131. The gas scrubber 131 can be a vessel to remove traces of liquid from the process gas that may have condensed in the process gas so that liquid is kept from the compression stages of the compressors 140A-B. Various sensors, such as level sensor or switch (LS) and level control valve (LCV), measure and regulate the liquid dropped out of the process gas in the scrubber 131.
The liquid from the scrubber 131 can be fed by a liquid line 134b having a safety valve (SV) and control valve (CV) to a liquid outlet 140a. Throughout the system 100, various pressure safety valves can connect to a pressure safety valve header and outlet 104b of the system 100. For instance, the scrubber 131 can also have a pressure safety valve 133 that can vent to the gas outlet 104b at the skid's edge.
At a gas outlet 134a of the scrubber 131, the process gas passes a pressure sensor (P). At this point, the pressure of the gas has been regulated down to a suitably low pressure, such as 5-psig. The process gas, now appreciably void of liquid droplets and at an appropriately controlled temperature and pressure, is communicated to one or both of the compression stages 140A-B. Bypass valves can be used to open or close gas flow to the compressors 140A-B depending on the required capacity. The gas enters and traverses through the one or more compression cycles 142A-D in the given compression stage 140A-B. For example, a continuous duty direct-drive booster compressor in the stages 140A-B with gas conditioning system can be used.
As shown in
Because the compression of the gas increases its temperature, an intercooler heat exchanger 144 after the compression stage cycle 142A-D cools the gas before the gas enters into a scrubber or demister stage 146. In the demister stage 146, any lubricant oil for the compressor 140 contained in the process gas can be collected at coalescing filters. Additional compression stage cycles 142B-D can follow the first cycle 142A as needed, and each can be followed by a relief valve 143, an intercooler 144, and a demister stage 146.
In the present example, four compression stage cycles 142A-D are shown, with relief valves 143 of increasing pressure ratings, such as 116-psig, 363-psig, 1450-psig, and 1650-psig as on example. Other pressure values can be used depending on the implementation. After the final aftercooler 144 of the last stage cycle 142D, temperature and pressure sensors monitor the process gas, which then passes to the discharge stage 160.
Returning to
The foregoing description of preferred and other embodiments is not intended to limit or restrict the scope or applicability of the inventive concepts conceived of by the Applicants. It will be appreciated with the benefit of the present disclosure that features described above in accordance with any embodiment or aspect of the disclosed subject matter can be utilized, either alone or in combination, with any other described feature, in any other embodiment or aspect of the disclosed subject matter.
This application is a continuation and claims priority to PCT Application No. PCT/US22/23357 filed on Apr. 4, 2022, entitled “SYSTEM AND METHOD FOR PROCESS GAS RECAPTURE FOR EMISSION RECOVERY” which claims priority to U.S. Provisional Application No. 63/170,704, filed on Apr. 5, 2021, entitled “SYSTEM AND METHOD FOR PROCESS GAS RECAPTURE FOR EMISSION RECOVERY,” the entirety of which are incorporated by reference.
| Number | Date | Country | |
|---|---|---|---|
| 63170704 | Apr 2021 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/US22/23357 | Apr 2022 | US |
| Child | 17841375 | US |
