CN114887942A - Probe cleaning system and method of reinjection water quality monitoring device - Google Patents
Probe cleaning system and method of reinjection water quality monitoring device Download PDFInfo
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- CN114887942A CN114887942A CN202210528009.4A CN202210528009A CN114887942A CN 114887942 A CN114887942 A CN 114887942A CN 202210528009 A CN202210528009 A CN 202210528009A CN 114887942 A CN114887942 A CN 114887942A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 203
- 238000004140 cleaning Methods 0.000 title claims abstract description 133
- 239000000523 sample Substances 0.000 title claims abstract description 87
- 238000012806 monitoring device Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000012544 monitoring process Methods 0.000 claims abstract description 137
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 238000002347 injection Methods 0.000 claims abstract description 9
- 239000007924 injection Substances 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000926 separation method Methods 0.000 description 5
- 239000013307 optical fiber Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1886—Water using probes, e.g. submersible probes, buoys
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
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Abstract
The invention belongs to the technical field of oilfield reinjection water quality monitoring, and relates to a probe cleaning system and a probe cleaning method of a reinjection water quality monitoring device, which comprises the following steps: the sleeve is inserted in the injection layer; the oil pipe is arranged in the sleeve, and the adjustable water nozzle and the water quality monitoring module are arranged on the oil pipe and are connected with the working condition machine; the adjustable water nozzle adjusts the opening of the water nozzle according to the instruction of the working condition machine, and controls the liquid amount in the oil pipe, so as to adjust the pressure of the pipeline at the lower end of the adjustable water nozzle; the water quality monitoring module is positioned below the adjustable water nozzle, comprises a plurality of sensors and a detection probe and is used for monitoring the reinjection water in real time and feeding back a monitoring result to the working condition machine; and the self-cleaning module is connected with the water quality monitoring module and controls the self-cleaning module to move up and down by adjusting the pressure difference between the upper end pipeline and the lower end pipeline, so that a monitoring probe in the water quality monitoring module is cleaned. When oil stains in reinjection water adhere to the probe, the probe can be cleaned in time, and the normal working state of the probe is ensured.
Description
Technical Field
The invention relates to a probe cleaning system and a probe cleaning method of a reinjection water quality monitoring device, and belongs to the technical field of oilfield reinjection water quality monitoring.
Background
The oil field can produce a large amount of sewage in the production process, and the treated water with low oil content and produced water is often required to be reinjected into the stratum, and the oil-rich produced liquid is lifted to the ground. Therefore, the oil-water separation system in the well usually takes a separator as a core, and comprises a separator channel for the produced liquid of the produced liquid layer, a separated low-oil-content produced water reinjection channel and an oil-rich produced liquid lifting channel. According to the changes of the liquid production amount, the water content, the water absorption capacity of a water injection layer and the like of the oil well, the flow rate, the pressure and the flow dividing ratio of an inlet and an outlet of the separator are adjusted, so that the separation efficiency is ensured, and the oil content of the reinjection water is controlled. For example, patent CN104989369A discloses a large-discharge downhole oil-water separation annulus logging and adjusting system, wherein the large-discharge downhole oil-water separation tubular column divides the system into a liquid production layer, a liquid production liquid entering an oil-water separator channel, a separated low-oil content production annulus reinjection channel and an oil-rich production liquid lifting channel; the annulus measurement and adjustment device monitors the pressure and the flow of the low-oil-content sewage in the annulus reinjection channel and adjusts the reinjection flow, so that the flow splitting ratio is adjusted, and the stability of the underground oil-water separation system is guaranteed. However, after the water with low oil content is reinjected into the stratum, the ecological environment of the stratum may be affected, for example, groundwater may be polluted, so the quality of the reinjection water needs to be monitored. Patent CN103792188A provides a water quality monitoring device of oil field reinjection water, includes: the system comprises an in-water oil detector, a suspended matter detector and a water quality monitoring central controller; the underwater oil detector comprises a laser light source, an emitting optical fiber, a receiving optical fiber and a fluorescence detector; the laser light source is connected with the transmitting optical fiber, the receiving optical fiber is connected with the fluorescence detector, and the suspended matter detection device comprises an infrared light source and a scattered light detector; the fluorescence detector and the scattered light detector are connected to a water quality monitoring center controller through communication lines. Although it can detect the quality of water of reinjection water, it can't be in the same place with the reinjection water installation is integrated, that is to say need can detect after having accomplished the reinjection water, if the problem takes place in the reinjection process, then can not in time feed back. In addition, the recycled water often has oil stains to pollute the monitoring probe, so that the monitoring probe deviates from the actual result if monitoring is carried out for a long time. However, if the monitoring probe is integrated into the reinjection water system, the whole system needs to be disassembled and assembled by cleaning the monitoring probe, which is time-consuming and labor-consuming.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a system and a method for cleaning a probe of a device for monitoring water quality of reinjection water, which can clean the probe in time when oil contamination in the reinjection water adheres to the probe, thereby ensuring a normal working state of the probe.
In order to achieve the purpose, the invention provides the following technical scheme: a clean system of probe of reinjection water quality monitoring device includes: the device comprises an oil pipe, an adjustable water nozzle, a water quality monitoring module, a self-cleaning module and an operating condition machine; the adjustable water nozzle, the water quality monitoring module and the self-cleaning module are all arranged on the oil pipe, and the adjustable water nozzle and the water quality monitoring module are all connected with the working condition machine; the water quality monitoring module is positioned below the adjustable water nozzle, comprises a plurality of sensors and a detection probe and is used for monitoring the reinjection water in real time and feeding back a monitoring result to the working condition machine; the self-cleaning module is connected with the water quality monitoring module and controls the self-cleaning module to move up and down by adjusting the pressure difference between the upper end pipeline and the lower end pipeline of the self-cleaning module, so that a monitoring probe in the water quality monitoring module is cleaned; the working condition machine is used for analyzing and processing the monitoring result of the water quality monitoring module.
Further, adjustable water injection well choke includes fixed part, adjusting valve rod and spacing portion, and the fixed part is fixed on oil pipe, adjusting valve rod and spacing portion fixed connection, and spacing portion sets up in the fixed part, and can be for the fixed part up-and-down motion, and liquid in the oil pipe flows out through the clearance between spacing portion and the fixed part, realizes the regulation to liquid flow through the size in regulation clearance.
Furthermore, the connection part of the upper end of the fixing part and the oil pipe is arranged to be in a step shape, and the width of the limiting part is larger than that of the widest step.
Further, the water quality monitoring module comprises a first pressure sensor, a second pressure sensor and a monitoring probe; the first pressure sensor is used for monitoring the pressure of an annulus between the reinjection water pipe column and the casing pipe at the depth of the first pressure sensor; the second pressure sensor is used for monitoring the pressure in the reinjection water pipe column at the depth of the second pressure sensor; and the monitoring probe is used for monitoring the quality of the reinjection water.
Furthermore, a first limiting shoulder is arranged above the water quality monitoring sensor and the monitoring probe and used for limiting the highest position of the self-cleaning module.
Further, the self-cleaning module comprises a cleaning head, a cleaning piston, a spring and a lower joint, wherein the cleaning head is arranged below the monitoring probe and used for cleaning the monitoring probe; the cleaning piston is connected with the cleaning head and used for driving the cleaning head to move up and down; the spring sets up in clean piston below, through pressure and the spring of adjusting clean piston top, controls the position of clean piston, and the lower clutch sets up in the spring below for fix spring and clean piston on the outer tube.
Furthermore, the self-cleaning module also comprises an outer sleeve, a first guide hole and a second guide hole are formed in the wall of the outer sleeve, and liquid outside the outer sleeve exerts hydraulic pressure on the self-cleaning module through the first guide hole and the second guide hole.
Further, the self-cleaning module further comprises a second limiting shoulder for limiting the lowest position of the self-cleaning module, and the second limiting shoulder is located between the first diversion hole and the spring.
Furthermore, a first packer is arranged above the adjustable water nozzle, a second packer and a third packer are respectively arranged below the self-cleaning module, the second packer and the third packer are respectively fixed on the oil pipe through a first sealing element and a second sealing element, a sieve pipe is arranged between the second packer and the third packer, and the bottom end of the oil pipe is provided with a plurality of through holes and is positioned in the sieve pipe.
The invention also discloses a probe cleaning method of the reinjection water quality monitoring device, and a probe cleaning system adopting any reinjection water quality monitoring device comprises the following steps: under the working condition, the reinjection water is injected into the injection layer through the oil pipe, and when the reinjection water passes through the water quality monitoring module, the monitoring probe transmits a monitoring result to the working condition machine; a first pressure sensor and a second pressure sensor in the water quality monitoring module respectively transmit the pressure data monitored by the first pressure sensor and the second pressure sensor to the working condition machine; if the monitoring probe needs to be cleaned, the working condition machine sends a signal to the adjustable water nozzle to adjust the size of a liquid outlet of the adjustable water nozzle, so that the acting force corresponding to the pressure value measured by the first pressure sensor is smaller than the sum of the acting force corresponding to the hydraulic pressure at the first diversion hole and the spring force; a cleaning piston of the self-cleaning module rises to the position of the water quality monitoring module, is limited by a first limiting shoulder and is prevented from rising continuously, so that the monitoring probe is cleaned, and after cleaning, the adjustable water nozzle is adjusted to enable the acting force corresponding to the pressure value measured by the first pressure sensor to be larger than the sum of the acting force corresponding to the hydraulic pressure at the first guide hole and the spring elasticity; the cleaning piston of the self-cleaning module retracts to the position below the water quality monitoring module, the second limiting shoulder is used for limiting, the adjustable water nozzle is repeatedly adjusted after one-time cleaning is finished, and the monitoring probe is repeatedly cleaned.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. according to the scheme, the water quality monitoring module is integrated into the system of the reinjection water, the water quality of the reinjection water can be monitored in the reinjection water reinjection process, the monitoring of the reinjection water is more timely and convenient, the strategy of the reinjection water can be timely adjusted according to the water quality condition, and the risk of environmental pollution is reduced.
2. The scheme of the invention can automatically clean the monitoring probe of the water quality monitoring module, and the probe can be cleaned in time when oil stain in the reinjection water is adhered to the probe, so that the normal working state of the probe is ensured, the accuracy of the monitoring result is ensured, the operation is convenient, the operation is simple and easy, and the whole system is not required to be disassembled.
Drawings
FIG. 1 is a schematic structural diagram of a probe cleaning system of a recycled water quality monitoring device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an adjustable water nozzle according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a water quality monitoring module according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a self-cleaning module according to an embodiment of the present invention;
FIG. 5 is a force analysis diagram of a cleaning piston of a self-cleaning module in accordance with an embodiment of the present invention.
Reference numerals:
1-a sleeve; 2-oil pipe; 3-adjustable water nozzle; 31-a stationary part; 32-adjusting the valve rod; 33-a limiting part; 4-a water quality monitoring module; 41-a first pressure sensor; 42-a second pressure sensor; 43-monitoring probe; 44-a first limit shoulder; 45-a connecting part; 5-self-cleaning module; 51-a cleaning head; 52-a cleaning piston; 53-a spring; 54-lower joint; 55-outer sleeve; 56-first flow guide holes; 57-second flow guiding holes; 58-a second stop shoulder; 6-working condition machine; 7-an upper computer; 8-a first packer; 9-a second packer; 10-a third packer; 11-a first seal; 12-a second seal; 13-screen.
Detailed Description
The present invention is described in detail with reference to specific embodiments for better understanding of the technical solutions of the present invention. It should be understood, however, that the detailed description is provided for a better understanding of the invention only and that they should not be taken as limiting the invention. In describing the present invention, it is to be understood that the terminology used is for the purpose of description only and is not intended to be indicative or implied of relative importance.
In order to solve the problems that a water quality monitoring device cannot be integrated with a water reinjection device in the prior art and a monitoring probe of the water quality monitoring device is time-consuming and labor-consuming to clean once the water quality monitoring device and the water reinjection device are combined, the invention provides a probe cleaning system and a probe cleaning method of the water reinjection water quality monitoring device, and the self-cleaning module is started to clean the monitoring probe by controlling the internal pressure and the external pressure of the self-cleaning module on line. The water quality monitoring module is connected with the self-cleaning module, the self-cleaning module is positioned below the water quality monitoring module, the working condition machine is connected with the adjustable oil nozzle and the water quality monitoring module, the upper computer is connected with the working condition machine, the water quality monitoring module transmits measured data to the working condition machine, and the measured data are displayed on software of the upper computer in real time. The upper computer sends an instruction to control the opening size of the adjustable water nozzle so as to control the pressure behind the water nozzle, and when the pressure reaches a certain range, the self-cleaning device is started and the probe of the reinjection water quality monitoring device is cleaned. The invention provides a foundation for the long-term well placement work of the underground reinjection water quality monitoring device, can effectively clean the probe and keep the good working state of the reinjection water quality monitoring device. The scheme of the invention is explained in detail by the embodiment in the following with the attached drawings.
Example one
The embodiment discloses a clean system of probe of reinjection water quality monitoring device, as shown in fig. 1, include: the device comprises a casing 1, an oil pipe 2, an adjustable water nozzle 3, a water quality monitoring module 4, a self-cleaning module 5 and a working condition machine 6;
the sleeve 1 is inserted in the injection layer; the water quality monitoring system is characterized in that an oil pipe 2 is arranged in a sleeve 1, an adjustable water nozzle 3, a water quality monitoring module 4 and a self-cleaning module 5 are sequentially arranged on the oil pipe 2 from top to bottom, the adjustable water nozzle 3 and the water quality monitoring module 4 are connected with an operating condition machine 6 through signal cables, the operating condition machine 6 is connected with an upper computer 7 through communication cables, and a water quality monitoring result and the pressure of each section in the oil pipe 2 are displayed in real time in the upper computer 7; the adjustable water nozzle 3 adjusts the opening of the water nozzle according to the instruction of the working condition machine 6, and controls the liquid amount in the oil pipe 2, so that the pressure of the pipeline at the lower end of the adjustable water nozzle is adjusted, and the self-cleaning module 5 is started to clean the monitoring probe 43; a first packer 8 is arranged above the adjustable water nozzle 3, and the first packer 8 is directly fixed on the oil pipe 2; the water quality monitoring module 4 comprises a plurality of sensors and detection probes and is used for monitoring the reinjection water in real time and feeding back the monitoring result to the working condition machine 6; the self-cleaning module 5 is connected with the water quality monitoring module 4, and controls the up-and-down movement of the self-cleaning module by adjusting the pressure difference between the upper end pipeline and the lower end pipeline of the self-cleaning module, so that the monitoring probe 43 in the water quality monitoring module 4 is cleaned. A second packer 9 and a third packer 10 are respectively arranged below the self-cleaning module 5, the second packer 9 and the third packer 10 are respectively fixed on the oil pipe 2 through a first sealing element 11 and a second sealing element 12, a sieve pipe 13 is arranged between the second packer 9 and the third packer 10, and the bottom end of the oil pipe 2 is provided with a plurality of through holes and is positioned in the sieve pipe 13.
Fig. 2 is a schematic structural diagram of the adjustable water nozzle 3 in this embodiment, as shown in fig. 2, the adjustable water nozzle 3 includes a fixing portion 31, an adjusting valve rod 32 and a limiting portion 33, the fixing portion 31 is fixed on the oil pipe 2, the adjusting valve rod 32 is fixedly connected with the limiting portion 33, the limiting portion 33 is disposed in the fixing portion 31 and can move up and down relative to the fixing portion 31, the liquid in the oil pipe 2 flows out through a gap between the limiting portion 33 and the fixing portion 31, and the adjustment of the liquid flow rate is realized by adjusting the size of the gap. The joint of the upper end of the fixing part 31 and the oil pipe 2 is arranged in a step shape, and the width of the limiting part 33 is larger than that of the widest step. The host computer 7 sends the instruction to the operating mode machine 6, and operating mode machine 6 passes through first signal cable and transmits for adjustable water injection well choke 3, and adjustable water injection well choke 3 moves according to the instruction, and adjusting valve rod 32 reciprocates, and then controls the size in clearance between spacing portion 33 and the fixed part 31, can control the liquid output of liquid outlet, also can control the pressure behind the liquid outlet.
Fig. 3 is a schematic structural diagram of the water quality monitoring module 4 in the present embodiment, and as shown in fig. 3, the water quality monitoring module 4 includes a first pressure sensor 41, a second pressure sensor 42, a water quality monitoring sensor and a monitoring probe 43; the first pressure sensor 41 is used for monitoring the pressure of an annulus between the reinjection water pipe column and the casing 1 at the depth of the first pressure sensor; a second pressure sensor 42 for monitoring the pressure within the reinjection string at the depth thereof; and the water quality monitoring sensor and monitoring probe 43 is used for monitoring the water quality of the reinjection water. A first limiting shoulder 44 is arranged above the water quality monitoring sensor and the monitoring probe 43 and used for limiting the highest position of the self-cleaning module 5. The water quality monitoring sensor is used for monitoring the water quality of the reinjection water.
The first pressure sensor 41, the second pressure sensor 42, the water quality monitoring sensor and the monitoring probe 43 in the water quality monitoring module 4 are all arranged on a connecting part 45 and used for fixing the sensors on the oil pipe 2. The inner wall of the connecting portion 45 has a plurality of grooves for accommodating the first pressure sensor 41, the second pressure sensor 42 and the water quality monitoring sensor, wherein the first pressure sensor 41 and the second pressure sensor 42 are disposed above the water quality monitoring sensor, and preferably, the first pressure sensor 41 and the second pressure sensor 42 are located at the same horizontal position in the embodiment. In the present embodiment, the monitoring probe 43 is preferably in the shape of a circle, and the inner diameter thereof matches the inner diameter of the connecting portion 45.
Fig. 4 is a schematic structural diagram of the self-cleaning module 5 in the present embodiment. As shown in fig. 4, the self-cleaning module 5 is connected to the water quality monitoring module 4 and sealed with respect thereto. The self-cleaning module 5 includes a cleaning head 51, a cleaning piston 52, a spring 53, and a lower joint 54, the cleaning head 51 being disposed in the connecting portion 45 at a position below the monitoring probe 43, and an outer diameter of the cleaning head 51 corresponding to an inner diameter of the monitoring probe 43 in a circle shape, so that when the cleaning head 51 is raised, an outer circumference of the cleaning head 51 can be brought into close contact with an inner circumference of the monitoring probe 43 to clean the monitoring probe 43; the cleaning piston 52 is connected with the cleaning head 51 and used for driving the cleaning head 51 to move up and down; a spring 53 is provided below the cleaning piston 52 to control the position of the cleaning piston 52 by adjusting the pressure above the cleaning piston 52 and the spring 53, and a lower joint 54 is provided below the spring 53 for fixing the spring 53 and the cleaning piston 52 on the oil pipe 2.
The self-cleaning module 5 further comprises an outer sleeve 55, a first diversion hole 56 and a second diversion hole 57 are formed in the wall of the outer sleeve 55, and hydraulic pressure is applied to the self-cleaning module 5 through the first diversion hole 56 and the second diversion hole 57. The self-cleaning module 5 further comprises a second limiting shoulder 58 for defining the lowest position of the self-cleaning module 5, i.e. the running range of the cleaning piston 52 between the first limiting shoulder 44 and the second limiting shoulder 58. The second stop shoulder 58 is positioned between the first pilot hole 56 and the spring 53.
Example two
Based on the same invention concept, the embodiment discloses a probe cleaning method of a reinjection water quality monitoring device, and the probe cleaning system adopting the reinjection water quality monitoring device comprises the following steps:
under the working condition, the reinjection water is injected into an injection layer through the oil pipe 2, the flow of the reinjection water is controlled by controlling the adjustable water nozzle 3, when the reinjection water passes through the water quality monitoring module 4, the monitoring probe 43 transmits the monitoring result to the working condition machine 6 through a signal cable, and the working condition machine 6 transmits the result to the upper computer 7 and displays the result in the upper computer 7; the first pressure sensor 41 and the second pressure sensor 42 in the water quality monitoring module 4 respectively transmit the monitored pressures to the working condition machine 6 through signal cables, the working condition machine 6 transmits the result to the upper computer 7, and the pressure value is displayed in the upper computer 7;
as shown in fig. 5, if the monitoring probe 43 needs to be cleaned, the hydraulic value at the first diversion hole 56 is equal to the pressure value of the first pressure sensor 41, the upper computer 7 sends a signal to the adjustable water nozzle 3 through the operating condition machine 6 to adjust the size of the liquid outlet of the adjustable water nozzle, and controls the pressure value measured by the second pressure sensor 42, where the pressure value is the upper end pressure P of the cleaning piston 52 1 The lower end pressure P of the cleaning piston 52 is obtained from the pressure value of the first pressure sensor 41 2 The area of the upper end of the cleaning piston 52 is S 1 The area of the lower end of the cleaning piston 52 is S 2 The piston area of the first pilot hole 56 is S 3 I.e., the annular area of the cross-section of the outer sleeve, the pressure at the first pilot holes 56 is expressed asP 3 Since the hydraulic pressure value at the first diversion hole 56 is equal to the pressure value of the first pressure sensor 41, P is obtained 3 ＝P 2 ，S 1 ＝S 2 +S 3 . Upper end pressure P 1 The thrust on the cleaning piston 52 is denoted as F 1 I.e. F 1 ＝P 1 ×S 1 ＝P 1 S 2 +P 1 S 3 Lower end pressure P 2 The thrust on the cleaning piston 52 is denoted as F 2 Then F is 2 ＝P 2 ×S 2 The thrust of the hydraulic pressure of the first pilot bore 56 against the piston is denoted as F 3 Then F is 3 ＝P 3 ×S 3 ＝P 2 ×S 3 The thrust of the spring 53 against the piston is indicated by F 4 Analyzing the force condition of the cleaning piston 52, the lower thrust is F 1 ＝P 1 S 2 +P 1 S 3 Thrust up is F 2 +F 3 +F 4 ＝P 2 S 2 +P 2 S 3 +F 4 Controlling P under normal reinjection 1 To make a downward thrust F 1 >Upward thrust force F 2 +F 3 +F 4 If the monitoring probe 43 needs to be cleaned, the hydraulic value at the first diversion hole 56 is made to be equal to the pressure value of the first pressure sensor 41, the operating condition machine 6 sends a signal to the adjustable water nozzle 3 to adjust the size of the liquid outlet of the adjustable water nozzle, and the second pressure sensor 42 monitors the adjusted pressure value, so that the pressure value at the moment is smaller than the sum of the pressure value of the first pressure sensor 41, the hydraulic value at the first diversion hole 56 and the elastic force of the spring 53;
the self-cleaning module 5 rises to the position of the water quality monitoring module 4, the monitoring probe 43 is cleaned, and after cleaning, the adjustable water nozzle 3 is adjusted to enable the pressure value monitored by the second pressure sensor 42 to be smaller than the sum of the pressure value of the first pressure sensor 41, the hydraulic value at the first flow guide hole 56 and the elastic force of the spring 53;
the self-cleaning module 5 is returned to the position below the water quality monitoring module 4, after one-time cleaning is finished, the adjustable water nozzle 3 is repeatedly adjusted, and the monitoring probe 43 is repeatedly cleaned.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims. The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a clean system of probe of reinjection water quality monitoring device which characterized in that includes: the device comprises an oil pipe, an adjustable water nozzle, a water quality monitoring module, a self-cleaning module and a working condition machine;
the adjustable water nozzle, the water quality monitoring module and the self-cleaning module are all arranged on the oil pipe, and the adjustable water nozzle and the water quality monitoring module are all connected with the working condition machine;
the water quality monitoring module is positioned below the adjustable water nozzle, comprises a plurality of sensors and a detection probe and is used for monitoring the reinjection water in real time and feeding back a monitoring result to the working condition machine;
the self-cleaning module is connected with the water quality monitoring module and controls the self-cleaning module to move up and down by adjusting the pressure difference between the upper end pipeline and the lower end pipeline of the self-cleaning module, so that a monitoring probe in the water quality monitoring module is cleaned;
and the working condition machine is used for analyzing and processing the monitoring result of the water quality monitoring module.
2. The probe cleaning system of the reinjection water quality monitoring device as claimed in claim 1, wherein the adjustable water nozzle comprises a fixing portion, an adjusting valve rod and a limiting portion, the fixing portion is fixed on the oil pipe, the adjusting valve rod is fixedly connected with the limiting portion, the limiting portion is arranged in the fixing portion and can move up and down relative to the fixing portion, liquid in the oil pipe flows out through a gap between the limiting portion and the fixing portion, and the adjustment of the liquid flow is realized by adjusting the size of the gap.
3. The probe cleaning system of the reinjection water quality monitoring device as claimed in claim 2, wherein the connection between the upper end of the fixing part and the oil pipe is provided in a step shape, and the width of the limiting part is greater than the width of the widest step.
4. The probe cleaning system of a reinjection water quality monitoring device as claimed in claim 1, wherein said water quality monitoring module comprises a first pressure sensor, a second pressure sensor and a monitoring probe; the first pressure sensor is used for monitoring the pressure of an annulus between the reinjection water pipe column and the casing pipe at the depth of the first pressure sensor; the second pressure sensor is used for monitoring the pressure in the reinjection water pipe column at the depth of the second pressure sensor; and the monitoring probe is used for monitoring the water quality of the reinjection water.
5. The probe cleaning system of the reinjection water quality monitoring device as claimed in claim 4, wherein a first limiting shoulder is arranged above the water quality monitoring sensor and the monitoring probe for limiting the highest position of the self-cleaning module.
6. The probe cleaning system of the reinjection water quality monitoring device as claimed in claim 4, wherein the self-cleaning module comprises a cleaning head, a cleaning piston, a spring and a lower joint, the cleaning head is arranged below the monitoring probe for cleaning the monitoring probe; the cleaning piston is connected with the cleaning head and used for driving the cleaning head to move up and down; the spring is arranged below the cleaning piston, the position of the cleaning piston is controlled by adjusting the pressure above the cleaning piston and the spring, and the lower joint is arranged below the spring and used for fixing the spring and the cleaning piston on the outer sleeve.
7. The probe cleaning system of the reinjection water quality monitoring device as claimed in claim 6, wherein the self-cleaning module further comprises an outer sleeve, a first guide hole and a second guide hole are formed in the wall of the outer sleeve, and the self-cleaning module is hydraulically pressurized by the liquid outside the outer sleeve through the first guide hole and the second guide hole.
8. The probe cleaning system of a reinjection water quality monitoring device according to claim 7, wherein the self-cleaning module further comprises a second limit shoulder for defining a lowest position of the self-cleaning module, the second limit shoulder being located between the first guide hole and the spring.
9. The probe cleaning system of the reinjection water quality monitoring device as claimed in any one of claims 1 to 8, wherein a first packer is arranged above the adjustable water nozzle, a second packer and a third packer are respectively arranged below the self-cleaning module, the second packer and the third packer are respectively fixed on the oil pipe through a first sealing element and a second sealing element, a sieve pipe is arranged between the second packer and the third packer, and a plurality of through holes are arranged at the bottom end of the oil pipe and are positioned in the sieve pipe.
10. A probe cleaning method of a reinjection water quality monitoring device, which adopts the probe cleaning system of the reinjection water quality monitoring device as claimed in any one of claims 1 to 9, and is characterized by comprising the following steps:
under the working condition, reinjection water is injected into the injection layer through the oil pipe, and when the reinjection water passes through the water quality monitoring module, the monitoring probe transmits a monitoring result to the working condition machine; a first pressure sensor and a second pressure sensor in the water quality monitoring module respectively transmit the monitored pressure data to the working condition machine;
if the monitoring probe needs to be cleaned, the working condition machine sends a signal to the adjustable water nozzle and adjusts the size of a liquid outlet of the adjustable water nozzle, so that the acting force corresponding to the pressure value measured by the first pressure sensor is smaller than the sum of the acting force corresponding to the hydraulic pressure at the first diversion hole and the spring force;
a cleaning piston of the self-cleaning module rises to the position of the water quality monitoring module and is limited by a first limiting shoulder, so that the cleaning piston is prevented from continuously rising, a monitoring probe is cleaned, and after cleaning, the adjustable water nozzle is adjusted to enable the acting force corresponding to the pressure value measured by the first pressure sensor to be larger than the sum of the acting force corresponding to the hydraulic pressure at the first flow guide hole and the spring force;
and the cleaning piston of the self-cleaning module retracts to the position below the water quality monitoring module, the water quality monitoring module is limited by a second limiting shoulder, the adjustable water nozzle is repeatedly adjusted after one-time cleaning is finished, and the monitoring probe is repeatedly cleaned.
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| CN114887942B (en) | 2023-03-21 |
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