# US 2014/0196794 A1 · System and process for supplying a chemical agent to a process fluid > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0196794 A1 - Document ID: US20140196794A1 - Status: Published application - Kind: A1 - Application number: 13/743,189 - Filed: 2013-01-16 - Published: 2014-07-17 - Earliest claimed: 2013-01-16 - Assignees: Voodoo Injection Management Ltd. - Applicants: Voodoo Injection Management Ltd. - Inventors: Shawn French - Web page: https://patentgrep.com/patent/US20140196794A1 ## CPC - F04B 13/00: Pumps specially modified to deliver fixed or variable measured quantities - Y10T 137/0352: Controlled by pressure - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract There is provided a process for controllably supplying a chemical agent to a flowing process fluid for effecting generation of treated flowing fluid comprising a chemical agent-derived fluid component material, wherein the chemical agent-derived fluid component material is derived from the chemical agent. The controllably supplying comprises: while discharging a chemical agent from a chemical agent supply system, modulating distribution of the chemical agent that is being discharged, between at least a flowing process fluid and a fluid bypass, with a chemical agent supply modulation system, in accordance with a system operating cycle, wherein the system operating cycle includes a single system supply mode and a single system bypass mode, and wherein the system bypass mode follows the system supply mode. ## Claims ### Claim at position 1 1-168. (canceled) ### Claim 169 A process for controllably supplying a chemical agent to a flowing process fluid for effecting generation of treated flowing fluid comprising a chemical agent-derived fluid component material, wherein the chemical agent-derived fluid component material is derived from the chemical agent, wherein the controllably supplying comprises: while discharging a chemical agent from a chemical agent supply system, modulating distribution of the chemical agent that is being discharged, between at least a flowing process fluid and a fluid bypass, with a chemical agent supply modulation system, in accordance with a system operating cycle, wherein the system operating cycle includes a single system supply mode and a single system bypass mode, and wherein the system bypass mode follows the system supply mode, and wherein the system operating cycle is repeated at least once such that alternating is effected as between the system supply mode and the system bypass mode, and such that a corresponding plurality of occurrences of the system supply mode and a corresponding plurality of occurrences of the system bypass mode are provided; wherein, over the entire duration of the system supply mode, fluid communication between the chemical agent supply system and the flowing process fluid is being effected; and wherein, over the entire duration of the system bypass mode, fluid communication between the chemical agent supply system and the fluid bypass is being effected; and wherein the chemical agent supply modulation system includes a bypass fluid flow interference device and a fluid pressure-responsive scaling device; and wherein, over the entire duration of the system supply mode, the bypass fluid flow interference device is disposed in a supply mode condition, and over the entire duration of the system bypass mode, the bypass fluid flow interference device is disposed in a bypass mode condition; and wherein the bypass fluid flow interference device is disposed between the chemical agent supply system and the fluid bypass, and is configured for selectively interfering with fluid communication between the chemical agent supply system and a fluid bypass, and when disposed in the supply mode condition, the bypass fluid flow interference device is disposed so as to effect relatively more interference with fluid communication between the chemical agent supply system and the fluid bypass, than when disposed in the bypass mode condition; and wherein the fluid pressure-responsive sealing device is disposed between the chemical agent supply system and the flowing process fluid, and is urged by downstream fluid pressure, for effecting sealing, or substantial sealing, of the fluid communication between the chemical agent supply system and the flowing process fluid, and the fluid pressure-responsive sealing device is configured to effect the scaling, or substantial sealing, while fluid pressure upstream of the fluid pressure-responsive sealing device is failing to sufficiently exceed the downstream fluid pressure, wherein the downstream fluid pressure is being communicated by the flowing process fluid; and wherein the bypass fluid flow interference device and the fluid pressure-responsive sealing device are co-operatively configured such that, while the chemical agent supply system is pressurizing the chemical agent upstream of both of the bypass fluid flow interference device and the fluid pressure-responsive scaling device, the fluid pressure upstream of the fluid pressure-responsive sealing device, which opposes the downstream fluid pressure that is urging the fluid pressure-responsive sealing device to effect sealing, or substantial scaling, of the fluid communication between the chemical agent supply system and the flowing process fluid, is responsive to the degree of interference being effected, to the fluid communication between the chemical agent supply system and the fluid bypass, by the bypass fluid flow interference device. ### Claim 170 (depends on 169) The process as claimed in claim 169; wherein, when disposed in the supply mode condition, and while the chemical agent supply system is pressurizing the chemical agent upstream of both of the bypass fluid flow interference device and the fluid pressure-responsive scaling device, the bypass fluid flow interference device is disposed so as to effect a relatively higher fluid pressure upstream of the fluid pressure-responsive sealing device, than when disposed in the bypass mode condition. ### Claim 171 (depends on 170) The process as claimed in claim 170; wherein, when the bypass fluid flow interference device is disposed in the supply mode condition, and while the chemical agent supply system is pressurizing the chemical agent upstream of both of the bypass fluid flow interference device and the fluid pressure-responsive sealing device, the effected upstream fluid pressure is sufficiently exceeding the downstream fluid pressure such that fluid communication between the chemical agent supply system and the flowing process fluid is being effected. ### Claim 172 (depends on 171) The process as claimed in claim 171; wherein, while the chemical agent supply system is pressurizing the chemical agent upstream of both of the bypass fluid flow interference device and the fluid pressure-responsive sealing device, sealing, or substantial sealing of fluid communication between the chemical agent supply system and the flowing process fluid is being effected by the fluid pressure-responsive sealing device when the degree of interference being effected by the bypass fluid flow interference device, while disposed in the bypass mode condition, is such that the effected upstream fluid pressure is failing to sufficiently exceed the downstream fluid pressure. ### Claim 173 (depends on 172) The process as claimed in claim 172; wherein, for at least one of the occurrences of the system supply mode, during the occurrence of the system supply mode, chemical agent is being discharged by the chemical agent supply system, and wherein, while the discharging is being effected, at least a fraction of the chemical agent being discharged by the chemical agent supply system is supplied to the flowing process fluid. ### Claim 174 (depends on 173) The process as claimed in claim 173; wherein the at least a fraction is at least 75% of the total volumetric amount of the chemical agent being discharged by the chemical agent supply system. ### Claim 175 (depends on 172) The process as claimed in claim 172; wherein, for at least one of the occurrences of the system supply mode: during the occurrence of the system supply mode, the sealing, or substantial sealing, of fluid communication, between chemical agent supply system and the fluid bypass, is being effected by the bypass fluid flow interference device, and chemical agent is being discharged by the chemical agent supply system; such that, during the occurrence of the system supply mode, discharging of the chemical agent by the chemical agent supply system is being effected while sealing, or substantial sealing, of fluid communication, between the chemical agent supply system and the fluid bypass, is being effected by the bypass fluid flow interference device; wherein, during the occurrence of the system supply mode, and while the discharging is being effected, all, or substantially all, of the chemical agent, that is being discharged by the chemical agent supply system, is being supplied to the flowing process fluid. ### Claim 176 (depends on 175) The process as claimed in claim 175; wherein, for at least one of the occurrences of the system bypass mode, during the occurrence of the system bypass mode, chemical agent is being discharged by the chemical agent supply system, and wherein, while the discharging is being effected, at least a fraction of the chemical agent being discharged by the chemical agent supply system is supplied to the fluid bypass. ### Claim 177 (depends on 176) The process as claimed in claim 176; wherein the at least a fraction is at least 75% of the total volumetric amount of the chemical agent being discharged by the chemical agent supply system. ### Claim 178 (depends on 176) The process as claimed in claim 176; wherein, for at least one of the occurrences of the system bypass mode: during the occurrence of the system bypass mode, the bypass fluid flow interference device is disposed such that fluid communication between the chemical agent supply system and the fluid bypass is being effected, and the chemical agent supply system is pressurizing the chemical agent upstream of both of the bypass fluid flow interference device and the fluid pressure-responsive sealing device and the disposition of the bypass fluid flow interference device is such that the effected upstream fluid pressure is failing to sufficiently exceed the downstream fluid pressure such that sealing, or substantial sealing, of fluid communication between the chemical agent supply system and the flowing process fluid is being effected by the fluid pressure-responsive sealing device, and chemical agent is being discharged by the chemical agent supply system; such that, during the occurrence of the system bypass mode, discharging of the chemical agent by the chemical agent supply system is being effected while the bypass fluid flow interference device is disposed such that fluid communication between the chemical agent supply system and the fluid bypass is being effected, and while the chemical agent supply system is pressurizing the chemical agent upstream of both of the bypass fluid flow interference device and the fluid pressure-responsive sealing device and the disposition of the bypass fluid flow interference device is such that the effected upstream fluid pressure is failing to sufficiently exceed the downstream fluid pressure such that sealing, or substantial sealing, of fluid communication between the chemical agent supply system and the flowing process fluid is being effected by the fluid pressure-responsive scaling device; wherein, during the occurrence of the system bypass mode, and while the discharging is being effected, all, or substantially all, of the chemical agent, that is being discharged by the chemical agent supply system, is being supplied to the fluid bypass. ### Claim 179 (depends on 169) The process as claimed in claim 169; wherein the discharging is continuous. ### Claim 180 (depends on 169) The process as claimed in claim 169; wherein the discharging is intermittent. ### Claim 181 (depends on 180) The process as claimed in claim 180; wherein the discharging is intermittent, and the intermittent discharging is such that a plurality of successively spaced-apart, in time, slugs of chemical agent are discharged by the chemical agent supply system; and wherein, for at least one of the occurrences of the system supply mode, during the occurrence of the system supply mode, one or more of the plurality of successively spaced-apart slugs of chemical agent are discharged by the chemical agent supply system; and wherein for at least one of the one or more of the plurality of successively spaced-apart slugs of chemical agent that are discharged by the chemical agent supply system, while the slug is being discharged, at least a fraction of the slug being discharged by the chemical agent supply system is being supplied to the flowing process fluid. ### Claim 182 (depends on 181) The process as claimed in claim 181; wherein the at least a fraction is at least 75% of the total volumetric amount of the chemical agent being discharged by the chemical agent supply system. ### Claim 183 (depends on 181) The process as claimed in claim 181; wherein the discharging is intermittent, and the intermittent discharging is such that a plurality of successively spaced-apart, in time, slugs of chemical agent are discharged by the chemical agent supply system; wherein, for at least one of the occurrences of the system supply mode: during the occurrence of the system supply mode, the sealing, or substantial scaling, of fluid communication, between chemical agent supply system and the fluid bypass, is being effected by the bypass fluid flow interference device, and one or more of the plurality of successively spaced-apart slugs of chemical agent are discharged by the chemical agent supply system; such that, during the occurrence of the system supply mode, discharging of one or more of the plurality of successively spaced-apart slugs of the chemical agent by the chemical agent supply system are being effected while sealing, or substantial sealing, of fluid communication, between the chemical agent supply system and the fluid bypass, is being effected by the bypass fluid flow interference device; wherein, during the occurrence of the system supply mode, and, for each one of the one or more of the plurality of successively spaced-apart slugs of the chemical agent, that are being discharged by the chemical agent supply system, while the discharging is being effected, the entirety, or substantially the entirety, of the slug, that is discharged by the chemical agent supply system, is being supplied to the flowing process fluid. ### Claim 184 (depends on 181) The process as claimed in claim 181; wherein the discharging is intermittent, and the intermittent discharging is such that a plurality of successively spaced-apart, in time, slugs of chemical agent are discharged by the chemical agent supply system; and wherein, for at least one of the occurrences of the system bypass mode, during the occurrence of the system bypass mode, one or more of the plurality of successively spaced-apart slugs of chemical agent are discharged by the chemical agent supply system; and wherein for at least one of the one or more of the plurality of successively spaced-apart slugs of chemical agent that are discharged by the chemical agent supply system, while the slug is being discharged, at least a fraction of the slug being discharged by the chemical agent supply system is being supplied to the fluid bypass. ### Claim 185 (depends on 184) The process as claimed in claim 184; wherein the at least a fraction is at least 75% of the total volumetric amount of the chemical agent being discharged by the chemical agent supply system. ### Claim 186 (depends on 184) The process as claimed in claim 184; wherein, for at least one of the occurrences of the system bypass mode: during the occurrence of the system bypass mode, the bypass fluid flow interference device is disposed such that fluid communication between the chemical agent supply system and the fluid bypass is being effected, and the chemical agent supply system is pressurizing the chemical agent upstream of both of the bypass fluid flow interference device and the fluid pressure-responsive sealing device and the disposition of the bypass fluid flow interference device is such that the effected upstream fluid pressure is failing to sufficiently exceed the downstream fluid pressure such that sealing, or substantial sealing, of fluid communication between the chemical agent supply system and the flowing process fluid is being effected by the fluid pressure-responsive sealing device, and one or more of the plurality of successively spaced-apart slugs of chemical agent are discharged by the chemical agent supply system, such that, during the occurrence of the system bypass mode, discharging of one or more of the plurality of successively spaced-apart slugs of the chemical agent by the chemical agent supply system are being effected while the bypass fluid flow interference device is disposed such that fluid communication between the chemical agent supply system and the fluid bypass is being effected, and while the chemical agent supply system is pressurizing the chemical agent upstream of both of the bypass fluid flow interference device and the fluid pressure-responsive sealing device and the disposition of the bypass fluid flow interference device is such that the effected upstream fluid pressure is failing to sufficiently exceed the downstream fluid pressure such that sealing, or substantial sealing, of fluid communication between the chemical agent supply system and the flowing process fluid is being effected by the fluid pressure-responsive sealing device; wherein, during the occurrence of the system bypass mode, and, for each one of the one or more of the plurality of successively spaced-apart slugs of the chemical agent, that are being discharged by the chemical agent supply system, while the discharging is being effected, the entirety, or substantially the entirety, of the slug, that is discharged by the chemical agent supply system, is being supplied to the fluid bypass. ### Claim 187 (depends on 169) The process as claimed in claim 169, further comprising: pressurizing the chemical agent, disposed within a chemical agent supply fluid passage, upstream of the fluid pressure-responsive sealing device, wherein the fluid pressure-responsive sealing device is disposed within the chemical agent supply fluid passage, between the chemical agent supply system and the flowing process fluid, wherein the pressurizing is effected by the chemical agent supply system; wherein, the pressurizing is effected when the fluid pressure-responsive sealing device is disposed such that sealing, or substantial sealing, of fluid communication between the chemical agent supply system and the flowing process fluid is effected, such that the pressure of the chemical agent supply fluid passage-disposed chemical agent, upstream of the fluid pressure-responsive sealing device, sufficiently exceeds the downstream fluid pressure, and effects a change in disposition of the fluid pressure-responsive sealing device such that fluid communication between the chemical agent supply system and the flowing process fluid is effected; wherein the portion of the chemical agent supply fluid passage, within which is disposed the chemical agent that becomes pressurized by the chemical agent supply system such that the chemical agent supply fluid passage-disposed chemical agent becomes disposed at the sufficiently exceeding pressure for effecting disposition of the fluid pressure-responsive interference device such that fluid communication between the chemical agent supply system and the flowing process fluid is effected, has a total volume that is less than 100 millilitres. ### Claim 188 (depends on 169) The process as claimed in claim 169; wherein the chemical agent supply system includes a prime mover for effecting the pressurization of the chemical agent. ### Claim 189 (depends on 188) The process as claimed in claim 188; wherein the prime mover includes a single-stage reciprocating pump. ### Claim 190 (depends on 169) The process as claimed in claim 169: wherein, during at least one of the occurrences of the system bypass mode, and while the discharging of the chemical agent is being effected, at least a fraction of the chemical agent that is being discharged by the chemical agent supply system and supplied to the fluid bypass is recirculated. ### Claim 191 A process for controllably supplying a chemical agent to a flowing process fluid for effecting generation of treated flowing fluid comprising a chemical agent-derived fluid component material, wherein the chemical agent-derived fluid component material is derived from the chemical agent, wherein the controllably supplying comprises: while discharging a chemical agent from a chemical agent supply system, modulating distribution of the chemical agent that is being discharged, between at least a flowing process fluid and a fluid bypass, with a chemical agent supply modulation system, wherein the distribution affecting condition of the chemical agent supply modulation system alternates between a system supply mode and a system bypass mode such that a plurality of occurrences of the system supply mode and a corresponding plurality of occurrences of the system bypass mode are provided; wherein, over the entire duration of the system supply mode, fluid communication between the chemical agent supply system and the flowing process fluid is being effected; and wherein, over the entire duration of the system bypass mode, fluid communication between the chemical agent supply system and the fluid bypass is being effected; and wherein the chemical agent supply modulation system includes a bypass fluid flow interference device and a fluid pressure-responsive scaling device; and wherein, over the entire duration of the system supply mode, the bypass fluid flow interference device is disposed in a supply mode condition, and over the entire duration of the system bypass mode, the bypass fluid flow interference device is disposed in a bypass mode condition; and wherein the bypass fluid flow interference device is disposed between the chemical agent supply system and the fluid bypass, and is configured for selectively interfering with fluid communication between the chemical agent supply system and a fluid bypass, and when disposed in the supply mode condition, the bypass fluid flow interference device is disposed so as to effect relatively more interference with fluid communication between the chemical agent supply system and the fluid bypass, than when disposed in the bypass mode condition; and wherein the fluid pressure-responsive sealing device is disposed between the chemical agent supply system and the flowing process fluid, and is urged by downstream fluid pressure, for effecting scaling, or substantial sealing, of the fluid communication between the chemical agent supply system and the flowing process fluid, and the fluid pressure-responsive sealing device is configured to effect the sealing, or substantial sealing, while fluid pressure upstream of the fluid pressure-responsive scaling device is failing to sufficiently exceed the downstream fluid pressure, wherein the downstream fluid pressure is being communicated by the flowing process fluid; and wherein the bypass fluid flow interference device and the fluid pressure-responsive sealing device are co-operatively configured such that, while the chemical agent supply system is pressurizing the chemical agent upstream of both of the bypass fluid flow interference device and the fluid pressure-responsive sealing device, the fluid pressure upstream of the fluid pressure-responsive sealing device, which opposes the downstream fluid pressure that is urging the fluid pressure-responsive sealing device to effect sealing, or substantial sealing, of the fluid communication between the chemical agent supply system and the flowing process fluid, is responsive to the degree of interference being effected, to the fluid communication between the chemical agent supply system and the fluid bypass, by the bypass fluid flow interference device. ### Claim 192 (depends on 191) The process as claimed in claim 191; wherein, when disposed in the supply mode condition, and while the chemical agent supply system is pressurizing the chemical agent upstream of both of the bypass fluid flow interference device and the fluid pressure-responsive sealing device, the bypass fluid flow interference device is disposed so as to effect a relatively higher fluid pressure upstream of the fluid pressure-responsive sealing device, than when disposed in the bypass mode condition. ### Claim 193 (depends on 192) The process as claimed in claim 192; wherein, when the bypass fluid flow interference device is disposed in the supply mode condition, and while the chemical agent supply system is pressurizing the chemical agent upstream of both of the bypass fluid flow interference device and the fluid pressure-responsive sealing device, the effected upstream fluid pressure is sufficiently exceeding the downstream fluid pressure such that fluid communication between the chemical agent supply system and the flowing process fluid is being effected. ### Claim 194 (depends on 193) The process as claimed in claim 193; wherein, while the chemical agent supply system is pressurizing the chemical agent upstream of both of the bypass fluid flow interference device and the fluid pressure-responsive sealing device, sealing, or substantial sealing of fluid communication between the chemical agent supply system and the flowing process fluid is being effected by the fluid pressure-responsive sealing device when the degree of interference being effected by the bypass fluid flow interference device, while disposed in the bypass mode condition, is such that the effected upstream fluid pressure is failing to sufficiently exceed the downstream fluid pressure. ### Claim 195 (depends on 194) The process as claimed in claim 194; wherein, for at least one of the occurrences of the system supply mode, during the occurrence of the system supply mode, chemical agent is being discharged by the chemical agent supply system, and wherein, while the discharging is being effected, at least a fraction of the chemical agent being discharged by the chemical agent supply system is supplied to the flowing process fluid. ### Claim 196 (depends on 195) The process as claimed in claim 195; wherein the at least a fraction is at least 75% of the total volumetric amount of the chemical agent being discharged by the chemical agent supply system. ### Claim 197 (depends on 195) The process as claimed claim 195; wherein, for at least one of the occurrences of the system supply mode: during the occurrence of the system supply mode, the sealing, or substantial sealing, of fluid communication, between chemical agent supply system and the fluid bypass, is being effected by the bypass fluid flow interference device, and chemical agent is being discharged by the chemical agent supply system; such that, during the occurrence of the system supply mode, discharging of the chemical agent by the chemical agent supply system is being effected while sealing, or substantial sealing, of fluid communication, between the chemical agent supply system and the fluid bypass, is being effected by the bypass fluid flow interference device; wherein, during the occurrence of the system supply mode, and while the discharging is being effected, all, or substantially all, of the chemical agent, that is being discharged by the chemical agent supply system, is being supplied to the flowing process fluid. ### Claim 198 (depends on 195) The process as claimed in claim 195; wherein, for at least one of the occurrences of the system bypass mode, and during the occurrence of the system bypass mode, chemical agent is being discharged by the chemical agent supply system, and wherein, while the discharging is being effected. at least a fraction of the chemical agent being discharged by the chemical agent supply system is supplied to the fluid bypass. ### Claim 199 (depends on 198) The process as claimed in claim 198; wherein the at least a fraction is at least 75% of the total volumetric amount of the chemical agent being discharged by the chemical agent supply system. ### Claim 200 (depends on 198) The process as claimed in claim 198; wherein, for at least one of the occurrences of the system bypass mode: during the occurrence of the system bypass mode, the bypass fluid flow interference device is disposed such that fluid communication between the chemical agent supply system and the fluid bypass is being effected, and the chemical agent supply system is pressurizing the chemical agent upstream of both of the bypass fluid flow interference device and the fluid pressure-responsive sealing device and the disposition of the bypass fluid flow interference device is such that the effected upstream fluid pressure is failing to sufficiently exceed the downstream fluid pressure such that sealing, or substantial sealing, of fluid communication between the chemical agent supply system and the flowing process fluid is being effected by the fluid pressure-responsive sealing device, and chemical agent is being discharged by the chemical agent supply system; such that, during the occurrence of the system bypass mode, discharging of the chemical agent by the chemical agent supply system is being effected while the bypass fluid flow interference device is disposed such that fluid communication between the chemical agent supply system and the fluid bypass is being effected, and while the chemical agent supply system is pressurizing the chemical agent upstream of both of the bypass fluid flow interference device and the fluid pressure-responsive sealing device, and the disposition of the bypass fluid flow interference device is such that the effected upstream fluid pressure is failing to sufficiently exceed the downstream fluid pressure such that sealing, or substantial sealing, of fluid communication between the chemical agent supply system and the flowing process fluid is being effected by the fluid pressure-responsive sealing device; wherein, during the occurrence of the system bypass mode, and while the discharging is being effected, all, or substantially all, of the chemical agent, that is being discharged by the chemical agent supply system, is being supplied to the fluid bypass. ### Claim 201 (depends on 191) The process as claimed in claim 191; wherein the discharging is continuous. ### Claim 202 (depends on 191) The process as claimed in claim 191; wherein the discharging is intermittent. ### Claim 203 (depends on 202) The process as claimed in claim 202; wherein the discharging is intermittent, and the intermittent discharging is such that a plurality of successively spaced-apart, in time, slugs of chemical agent are discharged by the chemical agent supply system; and wherein, for at least one of the occurrences of the system supply mode, during the occurrence of the system supply mode, one or more of the plurality of successively spaced-apart, in time, slugs of chemical agent are discharged by the chemical agent supply system; and wherein for at least one of the one or more of the plurality of successively spaced-apart slugs of chemical agent that are discharged by the chemical agent supply system, while the slug is being discharged, at least a fraction of the slug being discharged by the chemical agent supply system is being supplied to the flowing process fluid. ### Claim 204 (depends on 203) The process as claimed in claim 203; wherein the at least a fraction is at least 75% of the total volumetric amount of the chemical agent being discharged by the chemical agent supply system. ### Claim 205 (depends on 203) The process as claimed in claim 203: wherein the discharging is intermittent, and the intermittent discharging is such that a plurality of successively spaced-apart, in time, slugs of chemical agent are discharged by the chemical agent supply system; wherein, for at least one of the occurrences of the system supply mode: during the occurrence of the system supply mode, the sealing, or substantial sealing, of fluid communication, between chemical agent supply system and the fluid bypass, is being effected by the bypass fluid flow interference device. and one or more of the plurality of successively spaced-apart slugs of chemical agent are discharged by the chemical agent supply system; such that, during the occurrence of the system supply mode, discharging of one or more of the plurality of successively spaced-apart slugs of the chemical agent by the chemical agent supply system are being effected while sealing, or substantial sealing, of fluid communication, between the chemical agent supply system and the fluid bypass, is being effected by the bypass fluid flow interference device; wherein, during the occurrence of the system supply mode, and, for each one of the one or more of the plurality of successively spaced-apart slugs of the chemical agent, that are being discharged by the chemical agent supply system, while the discharging is being effected, the entirety, or substantially the entirety, of the slug, that is discharged by the chemical agent supply system, is being supplied to the flowing process fluid. ### Claim 206 (depends on 203) The process as claimed in claim 203; wherein, for at least one of the occurrences of the system bypass mode, during the occurrence of the system bypass mode, one or more of the plurality of successively spaced-apart slugs of chemical agent are discharged by the chemical agent supply system; and wherein for at least one of the one or more of the plurality of successively spaced-apart slugs of chemical agent that are discharged by the chemical agent supply system, while the slug is being discharged, at least a fraction of the slug being discharged by the chemical agent supply system is being supplied to the fluid bypass. ### Claim 207 (depends on 206) The process as claimed in claim 206; wherein the at least a fraction is at least 75% of the total volumetric amount of the chemical agent being discharged by the chemical agent supply system. ### Claim 208 (depends on 206) The process as claimed in claim 206; wherein the discharging is intermittent, and the intermittent discharging is such that a plurality of successively spaced-apart, in time, slugs of chemical agent are discharged by the chemical agent supply system; wherein, for at least one of the occurrences of the system bypass mode: during the occurrence of the system bypass mode, the bypass fluid flow interference device is disposed such that fluid communication between the chemical agent supply system and the fluid bypass is being effected, and the chemical agent supply system is pressurizing the chemical agent upstream of both of the bypass fluid flow interference device and the fluid pressure-responsive sealing device and the disposition of the bypass fluid flow interference device is such that the effected upstream fluid pressure is failing to sufficiently exceed the downstream fluid pressure such that sealing, or substantial sealing, of fluid communication between the chemical agent supply system and the flowing process fluid is being effected by the fluid pressure-responsive sealing device, and one or more of the plurality of successively spaced-apart slugs of chemical agent are discharged by the chemical agent supply system, such that, during the occurrence of the system bypass mode, discharging of one or more of the plurality of successively spaced-apart slugs of the chemical agent by the chemical agent supply system are being effected while the bypass fluid flow interference device is disposed such that fluid communication between the chemical agent supply system and the fluid bypass is being effected, and while the chemical agent supply system is pressurizing the chemical agent upstream of both of the bypass fluid flow interference device and the fluid pressure-responsive sealing device and the disposition of the bypass fluid flow interference device is such that the effected upstream fluid pressure is failing to sufficiently exceed the downstream fluid pressure such that sealing, or substantial sealing, of fluid communication between the chemical agent supply system and the flowing process fluid is being effected by the fluid pressure-responsive sealing device; wherein, during the occurrence of the system bypass mode, and, for each one of the one or more of the plurality of successively spaced-apart slugs of the chemical agent, that are being discharged by the chemical agent supply system, while the discharging is being effected, the entirety, or substantially the entirety, of the slug, that is discharged by the chemical agent supply system, is being supplied to the fluid bypass. ### Claim 209 (depends on 191) The process as claimed in claim 191; pressurizing the chemical agent, disposed within a chemical agent supply fluid passage, upstream of the fluid pressure-responsive sealing device, wherein the fluid pressure-responsive sealing device is disposed within the chemical agent supply fluid passage, between the chemical agent supply system and the flowing process fluid, wherein the pressurizing is effected by the chemical agent supply system; wherein, the pressurizing is effected when the fluid pressure-responsive sealing device is disposed such that scaling, or substantial sealing, of fluid communication between the chemical agent supply system and the flowing process fluid is effected, such that the pressure of the chemical agent supply fluid passage-disposed chemical agent, upstream of the fluid pressure-responsive scaling device, sufficiently exceeds the downstream fluid pressure, and effects a change in disposition of the fluid pressure-responsive sealing device such that fluid communication between the chemical agent supply system and the flowing process fluid is effected; wherein the portion of the chemical agent supply fluid passage, within which is disposed the chemical agent that becomes pressurized by the chemical agent supply system such that the chemical agent supply fluid passage-disposed chemical agent becomes disposed at the sufficiently exceeding pressure for effecting disposition of the fluid pressure-responsive interference device such that fluid communication between the chemical agent supply system and the flowing process fluid is effected, has a total volume that is less than 100 millilitres. ### Claim 210 (depends on 191) The process as claimed in claim 191; wherein the chemical agent supply system includes a prime mover for effecting the pressurization of the chemical agent. ### Claim 211 (depends on 210) The process as claimed in claim 210; wherein the prime mover includes a single-stage reciprocating pump. ### Claim 212 (depends on 191) The process as claimed in claim 191; wherein the pressure of the flowing process fluid is at least 5 psig. ### Claim 213 (depends on 191) The process as claimed in claim 191; wherein, during at least one of the occurrences of the system bypass mode, and while the discharging of the chemical agent is being effected, at least a fraction of the chemical agent that is being discharged by the chemical agent supply system and supplied to the fluid bypass is recirculated.