CN103114832A - Interaction type stratified water injection measuring method - Google Patents
Interaction type stratified water injection measuring method Download PDFInfo
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- CN103114832A CN103114832A CN2013100442074A CN201310044207A CN103114832A CN 103114832 A CN103114832 A CN 103114832A CN 2013100442074 A CN2013100442074 A CN 2013100442074A CN 201310044207 A CN201310044207 A CN 201310044207A CN 103114832 A CN103114832 A CN 103114832A
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Abstract
The invention provides an interaction type stratified water injection measuring method. The method comprises steps as below: step A: enabling coaxial steel pipe cables used for a underground mine measuring meter to penetrate through a well mouth anti-spraying tube into a layer section needing to be allocated to be positioned and sealed in a setting mode; step B: enabling the underground well measuring meter inserted into the well and an arranged eccentric water injection packer to be connected in an abutting mode, and injecting water to the layer section needing to be allocated, and testing flow and pressure of the layer section needing to be allocated; step C: transmitting feedback monitoring signals to ground through the coaxial steel pipe; step D: adjusting water injection flow automatically by transmitting control signals to the underground well through the coaxial steel pipe from the ground according to the difference of the feedback monitoring signals and a preset injection allocation amount until a preset flow is achieved; step E: controlling the coaxial steel pipe on the ground to unseal the underground well measuring meter, and moving the underground well measuring meter to the next layer section needs to allocate.
Description
Technical field
The present invention relates to the oil notes and adopt the field, be specifically related to a kind of interactive seperated layer water injection measuring and regulating method.
Background technology
The laminated distributor under well water injection technology is one of important method in oil extraction process.Conventional waterflooding well water amount allotment maximum or by frequent pulling, classification is changed water nozzle and is realized.Hold not tape cable of lotus steel wire, test traffic and other parameter can't real-time direct-readings and stopper for regulating water nozzle automatically like this, can't realize that interactive seperated layer water injection surveys accent, can only independently frequently carry out respectively.In addition, be used at present the cable that all kinds of oil, gas well etc. bear mechanical load and mostly adopt the armouring wire cable, this cable steel wire sometimes can cause and cuts brokenly insulating layer and cause internal core and cover wire to form short circuit phenomenon, and undesirable at the sealing effectiveness of well head.
Summary of the invention
The invention provides a kind of interactive seperated layer water injection measuring and regulating method, realize with solution the difficult problem that interactive seperated layer water injection survey is transferred.
For this reason, the present invention proposes a kind of interactive seperated layer water injection measuring and regulating method, and described interactive seperated layer water injection measuring and regulating method comprises:
Steps A: downhole measurement adjusting instrument is passed the shaft mouth anti-blowout pipe lower going-into-well with coaxial steel pipe cable locate and set down to the interval of needs allotment, described coaxial steel pipe cable comprises: the single-core cable core, be enclosed in the annular insulating layer outside described single-core cable core and be enclosed in metal tube outside annular insulating layer, the axle center of described single-core cable core and the axis coinciding of described metal tube;
Step B: the eccentric water injection blanking plug that the downhole measurement adjusting instrument under lower going-into-well and down-hole are set docks, to the interval water filling of needs allotments and test described flow and the pressure that needs the interval of allotment;
Step C: transmit earthward the feedback monitoring signal by described coaxial steel pipe cable, described monitor signal comprises flow and the pressure that real-time monitors;
Step D: on ground, according to the deviation of described feedback monitoring signal and default injection allocation amount, send control signal by coaxial steel pipe cable to the down-hole, automatically adjust injection flow, until reach preset flow;
Step e: control the described downhole measurement adjusting instrument of coaxial steel pipe cable deblocking on ground, and downhole measurement adjusting instrument is moved to the interval that next need to be allocated.
Further, described metal tube is pipe, and described single-core cable core feedback monitoring signal and transfer control signal are transmitted the driven by power on ground simultaneously to the down-hole.
Further, described interactive seperated layer water injection measuring and regulating method also comprises: step F: put forward or transfer mode in employing after step e full well allotment result is unified to detect.
Further, by the steel pipe cable reel, described coaxial steel pipe cable is passed under the shaft mouth anti-blowout pipe lower going-into-well, ground is provided with computer, accepts monitor signal and sends control signal.
Further, direct current generator is set in the down-hole connects described coaxial steel pipe cable, use Hooks coupling universal coupling to connect direct current generator, with the docking adjusting head connection Hooks coupling universal coupling of eccentric water injection blanking plug, realize that the down-hole moment of torsion transmits and eccentric operation.
Further, described eccentric water injection blanking plug has water nozzle, described water nozzle comprises: spool and be arranged on valve pocket outside described spool, described spool are provided with the V-arrangement opening that changes in flow rate and pressure reduction are linear approximate relationship, and described eccentric water injection blanking plug is by control pressure reduction Linear Control injection flow.
Further, the forward or reverse that described eccentric water injection blanking plug is controlled spool by the single-core cable core reaches the purpose of heightening or turn down the injection allocation amount, and the mode of communicating by letter by coding and analogue communication of described coaxial steel pipe cable feedback monitoring signal and transfer control signal realizes.
Further, coaxial steel pipe cable feedback monitoring signal and communicating by letter of transfer control signal specifically comprise the following steps: host computer sends instruction according to the requirement of communications protocol to slave computer, and this instruction is a byte; This instruction is converted into analog signal, sends slave computer to; Slave computer is processed signal, then signal is sent to Intelligent treatment device single-chip microcomputer; Single-chip microcomputer detects communication and allows signal, and carries out corresponding instruction and action according to requirement and the setting of communications protocol; Simultaneously, detection signal is sent to host computer after processing.
Further, the monitor signal of described coaxial steel pipe cable feedback carries out filtering, amplification and detection processing by ground control unit is set on the ground, from the analog-signal transitions to the data signal, is input to computer.
Further, when by the steel pipe cable reel when being arranged on downhole measurement adjusting instrument under coaxial steel pipe cable and rendering to the down-hole, computer collects the reference depth of current downhole measurement adjusting instrument by degree of depth plate, to realize the accurate location of downhole measurement adjusting instrument.
because the skin of coaxial steel pipe cable is steel pipe, with respect to common armored cable, the appearance of coaxial steel pipe cable of the present invention is Paint Gloss, and shape is identical with the channel shape of shaft mouth anti-blowout pipe, be fit to very much using and sealing of shaft mouth anti-blowout pipe, utilize coaxial steel pipe cable to pass under the shaft mouth anti-blowout pipe lower going-into-well, with instruments such as utilizing oil pipe pass under the shaft mouth anti-blowout pipe lower going-into-well convenient equally, when making downhole measurement adjusting instrument render to the down-hole, the well head place is sealed, prevented from the phenomenon of well head ejection liquid, and coaxial steel pipe cable is tightr to being sealed and matched of shaft mouth anti-blowout pipe, the outer poorly sealed phenomenon that causes well head ejection liquid that common armored cable lower going-into-well armored cable of lower time can not occur, this provides guarantee for complete water injection well layering survey accent in interactively mode.
The present invention utilizes coaxial steel pipe cable to complete water injection well layering in interactively mode and surveys accent; another advantage of coaxial steel pipe cable is the good protection of insulating layer acquisition of cable inside; can not cut brokenly insulating layer and cause internal core and cover wire to form short circuit phenomenon by the invar silk; the cable outer wall is smooth cylindrical shape; can obtain easily good sealing effectiveness at well head, solve the wellhead of water injection well sealing problem that always perplexs the oil field.Simultaneously, both-way communication and the control of ground installation and downhole instrument have been realized by coaxial steel pipe cable.
Description of drawings
Fig. 1 is the operating principle schematic diagram according to the interactive seperated layer water injection measuring and regulating method of the embodiment of the present invention;
Fig. 2 is the structural representation according to the coaxial steel pipe cable of the embodiment of the present invention;
Fig. 3 is the structural representation according to the eccentric water injection blanking plug of the coaxial steel pipe cable of the embodiment of the present invention.
The drawing reference numeral explanation:
01, adjusting rod 02, fishing bell 03, spring 04, lock bracket 05, cam 06, screw 07, spool 08, valve pocket 09, V-arrangement open 10, gap 20, computer 25, ground control unit 30, coaxial steel pipe cable 31, steel pipe cable reel 40, shaft mouth anti-blowout pipe 50, packer 60, injection well downhole flow regulator 70, eccentric water injection blanking plug 80, downhole measurement adjusting instrument 90, stratum 301, single-core cable core 303, insulating layer 305, metal tube
The specific embodiment
Understand for technical characterictic of the present invention, purpose and effect being had more clearly, now contrast description of drawings the specific embodiment of the present invention.
As shown in Figure 1, the interactive seperated layer water injection measuring and regulating method according to the embodiment of the present invention comprises:
Steps A: the downhole measurement adjusting instrument 80 coaxial steel pipe cables 30 of use down to the interval of needs allotments (are for example passed shaft mouth anti-blowout pipe 40 lower going-into-wells, be lowered to stratum 90, this interval is by packer 50 packings) locate and set, as shown in Figure 2, described coaxial steel pipe cable 30 comprises: single-core cable core 301, be enclosed in the annular insulating layer 303 outside described single-core cable core and be enclosed in metal tube 305 outside annular insulating layer, the axis coinciding of the axle center of described single-core cable core 301 and described metal tube 305;
Step B: the eccentric water injection blanking plug 70 that the downhole measurement adjusting instrument 80 under lower going-into-well and down-hole are set docks, eccentric water injection blanking plug 70 is arranged in injection well downhole flow regulator 60, by injection well downhole flow regulator 60 to the interval water filling of needs allotments and test described flow and the pressure that needs the interval of allotment;
Step C: transmit earthward the feedback monitoring signal by described coaxial steel pipe cable 30, described monitor signal comprises the signals such as the flow that real-time monitors and pressure, the flow that monitor signal for example detects for downhole measurement adjusting instrument, pressure and temperature signal;
Step D: on ground, according to the deviation of described feedback monitoring signal and default injection allocation amount, send control signal by coaxial steel pipe cable 30 to the down-hole, automatically adjust injection flow, until reach preset flow;
Step e: after this layer allotment completed, the regulating arm of packing up downhole measurement adjusting instrument 80 transfers/on carry to another interval that need to allocate and carry out allocation test, control the coaxial steel pipe cable 30 described downhole measurement adjusting instruments 80 of deblocking on ground, and downhole measurement adjusting instrument 80 is moved to the interval that next need to be allocated.
The present invention utilizes coaxial steel pipe cable to complete water injection well layering in interactively mode and surveys accent; another advantage of coaxial steel pipe cable is the good protection of insulating layer acquisition of cable inside; can not cut brokenly insulating layer and cause internal core and cover wire to form short circuit phenomenon by the invar silk; the cable outer wall is smooth cylindrical shape; can obtain easily good sealing effectiveness at well head, solve the wellhead of water injection well sealing problem that always perplexs the oil field.Simultaneously, both-way communication and the control of ground installation and downhole instrument have been realized by coaxial steel pipe cable.In addition, the present invention utilizes coaxial steel pipe cable feedback monitoring signal and transfer control signal to transmit simultaneously the driven by power on ground to the down-hole, accomplish joint use, can realize the dual-use function of information carrying signal and transmitting electric power, the driven by power of down-hole need not other cable transmission.
Further, as Fig. 2, described metal tube 305 is pipe, is for example circular stainless steel tube, and described single-core cable core 301 feedback monitoring signals and transfer control signal are transmitted the driven by power on ground simultaneously to the down-hole.Use single-core cable core 301 information carrying signal and electric power transfer simultaneously, and the motor power supply in the downhole measurement adjusting instrument, complete set, the work of deblocking and adjusting water injection rate, can reduce the diameter of coaxial steel pipe cable.
Characteristics according to the joint use of single-core cable core, in the present invention, communicating by letter of coaxial steel pipe cable feedback monitoring signal and transfer control signal realizes by coding and the mode of analogue communication, the especially suitable electric power transfer of carrying out simultaneously of the mode of this coding and analogue communication.Adopt the analogue communication mode to replace traditional digital communication mode, the existence of eliminating capacitor and inductor on cable that has not only improved communication speed but also the prolongation by the time is risen on frequency signal and is extended or the impact of rising edge, improves the success rate of signal demodulator.The present invention is simple and reliable, and cost is low, easily realizes.
Further, as Fig. 1, the steel pipe cable reel 31 that arranges by ground passes described coaxial steel pipe cable 30 under shaft mouth anti-blowout pipe 40 lower going-into-wells, ground is provided with computer 20, accept the monitor signal of coaxial steel pipe cable 30 transmission and send control signal, sending the down-hole to by coaxial steel pipe cable 30.Can realize the data acquisition of downhole flow, pressure, temperature, the injection allocation amount adjustment that the control injection well downhole flow regulator is realized the injection allocation layer by computer 20; Show the tasks such as work at present state, data processing, inquiry.
Further, as Fig. 1, the monitor signal of described coaxial steel pipe cable feedback carries out filtering, amplification and detection processing by ground control unit 25 is set on the ground, from the analog-signal transitions to the data signal, is input to computer 20.Ground control unit 25 for example comprises wave filter, amplifier and the device from the analog-signal transitions to the data signal.Like this, can eliminate the signal that carry up through a few km transmission lines the down-hole, add the conversion of injection allocation motor power supply state and produce various interference effects, signal is through sending acquisition module identification after pre-process.Through from the analog-signal transitions to the data signal, facilitate computer to read.In order to improve certainty of measurement, adopted the collection circuit of high-precision intelligent CNT module (32 figure place function) as it.
Further, coaxial steel pipe cable feedback monitoring signal and communicating by letter of transfer control signal specifically comprise the following steps: host computer sends instruction according to the requirement of communications protocol to slave computer, and this instruction is a byte; This instruction is converted into analog signal, sends slave computer to; Slave computer is processed signal, then signal is sent to Intelligent treatment device single-chip microcomputer; Single-chip microcomputer detects communication and allows signal, and carries out corresponding instruction and action according to requirement and the setting of communications protocol; Simultaneously, detection signal is sent to host computer after processing.
Further, when rendering to the down-hole by 31 downhole measurement adjusting instruments that are arranged under coaxial steel pipe cable of steel pipe cable reel, computer collects the reference depth of current downhole measurement adjusting instrument by degree of depth plate, to realize the accurate location of downhole measurement adjusting instrument.
As shown in Figure 3, the eccentric water injection blanking plug comprises: adjusting rod 01, cam 05, lock bracket 04, spring 03 and fishing bell 02.Lock bracket 04 has the long waist shaped through hole.Cam 05 both ends of the surface are the plane, and cam has the X-shaped through hole in the middle of 05 face of cylinder, and wherein X hole one end face is fluted, and cam 05 can directly be put in lock bracket long waist shaped through hole, by both sides screw 06 location, can radially swing certain angle.Adjusting rod is a multidiameter, and the thinnest part can be by X-shaped through hole in the middle of cam, and intermediate step part and cam groove cooperating, maximum step surface are used for locating, and top is used for pulling and adjusting.The advantage of this eccentric water injection blanking plug is simple in structure, and is easy for installation, can regulate continuously, is applicable to more occasions, solved the problem that traditional Underwell packet apparatus can not pass cam and regulate continuously.
Further, as shown in Figure 3, described eccentric water injection blanking plug also has water nozzle, described water nozzle comprises: spool 7 and the valve pocket 8 that is arranged on outside described spool, described spool 7 is provided with the V-arrangement opening 9 that changes in flow rate and pressure reduction are linear approximate relationship, described eccentric water injection blanking plug 70 is controlled valve pocket and spool aperture by adjusting rod 01, controls pressure reduction Linear Control injection flow.High-Pressure Water is controlled valve pocket and spool aperture by many gaps 10 through adjusting rod 01, reaches the control injection flow.
Further, described interactive seperated layer water injection measuring and regulating method also comprises: step F: put forward or transfer mode in employing after step e full well allotment result is unified to detect.By on carry or transfer downhole measurement adjusting instrument 80, can realize the survey on each stratum 90 is transferred.
In order to coordinate the use of the coaxial steel pipe cable 30 with single-core cable core, downhole measurement adjusting instrument 80 is selected small-power, high rotating speed direct current generator aspect transmission, drive transmission ratio gear output high pulling torque, application has telescopic Hooks coupling universal coupling with spline as the driving torque assembly, motor is ensconced in the instrument extra heavy pipe, like this as long as solve dynamic seal (packing).Especially on adjustable blanking plug (eccentric water injection blanking plug) docking adjusting head, realize in conjunction with some logic mechanism of automatically controlled employing in the mechanisms such as instrument location.Utilize effective cooperation and the mechanical universal shaft coupling device of little torque motor and planetary transmission, solved the purpose that needs to realize high pulling torque transmission and DH eccentric center operation in the control procedure fully.The moment of torsion that motor produces amplifies by universal joint shaft joint rotation adjustable stopper adjust flux size through the planetary gear reduction box ratio.Electric machine rotation cooperation position feedback states can be realized the draw-in and draw-off function of governor motion adjusting head by the rotation of motor.
The present invention uses coaxial steel pipe cable to complete the electronic survey of interactive seperated layer water injection and transfers, realized completing simultaneously the task of each layer down-hole layer bit traffic test and the automatic injection allocation of destination layer bit traffic in the once process of going into the well, improve testing efficiency, shortened to 1.5 days in 23 days from the past between the survey timing.
The above only is the schematic specific embodiment of the present invention, is not to limit scope of the present invention.For each ingredient of the present invention can make up under the condition of not conflicting mutually, any those skilled in the art, the equivalent variations of having done under the prerequisite that does not break away from design of the present invention and principle and modification all should belong to the scope of protection of the invention.
Claims (10)
1. an interactive seperated layer water injection measuring and regulating method, is characterized in that, described interactive seperated layer water injection measuring and regulating method comprises:
Steps A: downhole measurement adjusting instrument is passed the shaft mouth anti-blowout pipe lower going-into-well with coaxial steel pipe cable locate and set down to the interval of needs allotment, described coaxial steel pipe cable comprises: the single-core cable core, be enclosed in the annular insulating layer outside described single-core cable core and be enclosed in metal tube outside annular insulating layer, the axle center of described single-core cable core and the axis coinciding of described metal tube;
Step B: the eccentric water injection blanking plug that the downhole measurement adjusting instrument under lower going-into-well and down-hole are set docks, to the interval water filling of needs allotments and test described flow and the pressure that needs the interval of allotment;
Step C: transmit earthward the feedback monitoring signal by described coaxial steel pipe cable, described monitor signal comprises flow and the pressure that real-time monitors;
Step D: on ground, according to the deviation of described feedback monitoring signal and default injection allocation amount, send control signal by coaxial steel pipe cable to the down-hole, automatically adjust injection flow, until reach preset flow;
Step e: control the described downhole measurement adjusting instrument of coaxial steel pipe cable deblocking on ground, and downhole measurement adjusting instrument is moved to the interval that next need to be allocated.
2. interactive seperated layer water injection measuring and regulating method as claimed in claim 1, is characterized in that, described metal tube is pipe, and described single-core cable core feedback monitoring signal and transfer control signal are transmitted the driven by power on ground simultaneously to the down-hole.
3. interactive seperated layer water injection measuring and regulating method as claimed in claim 1, is characterized in that, described interactive seperated layer water injection measuring and regulating method also comprises: step F: put forward or transfer mode in employing after step e full well allotment result is unified to detect.
4. interactive seperated layer water injection measuring and regulating method as claimed in claim 1, is characterized in that, by the steel pipe cable reel, described coaxial steel pipe cable passed under the shaft mouth anti-blowout pipe lower going-into-well, and ground is provided with computer, accepts monitor signal and send control signal.
5. interactive seperated layer water injection measuring and regulating method as claimed in claim 1, it is characterized in that, direct current generator is set in the down-hole connects described coaxial steel pipe cable, use Hooks coupling universal coupling to connect direct current generator, docking adjusting head with the eccentric water injection blanking plug connects Hooks coupling universal coupling, realizes that the down-hole moment of torsion transmits and eccentric operation.
6. interactive seperated layer water injection measuring and regulating method as claimed in claim 1, it is characterized in that, described eccentric water injection blanking plug has water nozzle, described water nozzle comprises: spool and the valve pocket that is arranged on outside described spool, described spool is provided with the V-arrangement opening that changes in flow rate and pressure reduction are linear approximate relationship, and described eccentric water injection blanking plug is by controlling pressure reduction Linear Control injection flow.
7. interactive seperated layer water injection measuring and regulating method as claimed in claim 4, it is characterized in that, the forward or reverse that described eccentric water injection blanking plug is controlled spool by the single-core cable core reaches the purpose of heightening or turn down the injection allocation amount, and the mode of communicating by letter by coding and analogue communication of described coaxial steel pipe cable feedback monitoring signal and transfer control signal realizes.
8. interactive seperated layer water injection measuring and regulating method as claimed in claim 7, it is characterized in that, coaxial steel pipe cable feedback monitoring signal and communicating by letter of transfer control signal specifically comprise the following steps: host computer sends instruction according to the requirement of communications protocol to slave computer, and this instruction is a byte; This instruction is converted into analog signal, sends slave computer to; Slave computer is processed signal, then signal is sent to Intelligent treatment device single-chip microcomputer; Single-chip microcomputer detects communication and allows signal, and carries out corresponding instruction and action according to requirement and the setting of communications protocol; Simultaneously, detection signal is sent to host computer after processing.
9. interactive seperated layer water injection measuring and regulating method as claimed in claim 8, it is characterized in that, the monitor signal of described coaxial steel pipe cable feedback carries out filtering, amplification and detection processing by ground control unit is set on the ground, from the analog-signal transitions to the data signal, is input to computer.
10. interactive seperated layer water injection measuring and regulating method as claimed in claim 4, it is characterized in that, when by the steel pipe cable reel when being arranged on downhole measurement adjusting instrument under coaxial steel pipe cable and rendering to the down-hole, computer collects the reference depth of current downhole measurement adjusting instrument by degree of depth plate, to realize the accurate location of downhole measurement adjusting instrument.
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| CN2013100442074A CN103114832A (en) | 2013-02-04 | 2013-02-04 | Interaction type stratified water injection measuring method |
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| CN2013100442074A CN103114832A (en) | 2013-02-04 | 2013-02-04 | Interaction type stratified water injection measuring method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105625988A (en) * | 2014-11-03 | 2016-06-01 | 中国石油天然气股份有限公司 | Testing and deploying system of high-pressure separated injection well and mounting method of system |
| CN107514255A (en) * | 2017-09-06 | 2017-12-26 | 中国海洋石油总公司 | A kind of injection profile test device and its method of testing for High angle water injection well |
| CN107630689A (en) * | 2017-11-10 | 2018-01-26 | 中国石油化工股份有限公司 | Ground controls time-sharing layered water-filling method and cable control water dispensing apparatus and its application method |
| CN108999601A (en) * | 2018-07-26 | 2018-12-14 | 中国石油天然气股份有限公司 | A kind of chemical flooding dispensing well zonal flow rate deployment device and concocting method |
| CN110094176A (en) * | 2018-01-30 | 2019-08-06 | 东营市创元石油机械制造有限公司 | Oil drilling mud saver valve |
| CN112324404A (en) * | 2020-11-03 | 2021-02-05 | 中国石油化工股份有限公司 | Integrated intelligent water distribution system and method |
| CN113889300A (en) * | 2021-09-26 | 2022-01-04 | 西安蓝水泵业有限公司 | Well cable and well logging system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105625988A (en) * | 2014-11-03 | 2016-06-01 | 中国石油天然气股份有限公司 | Testing and deploying system of high-pressure separated injection well and mounting method of system |
| CN105625988B (en) * | 2014-11-03 | 2018-04-03 | 中国石油天然气股份有限公司 | A kind of the test mixing system and its installation method of high pressure dispensing well |
| CN107514255A (en) * | 2017-09-06 | 2017-12-26 | 中国海洋石油总公司 | A kind of injection profile test device and its method of testing for High angle water injection well |
| CN107630689A (en) * | 2017-11-10 | 2018-01-26 | 中国石油化工股份有限公司 | Ground controls time-sharing layered water-filling method and cable control water dispensing apparatus and its application method |
| CN110094176A (en) * | 2018-01-30 | 2019-08-06 | 东营市创元石油机械制造有限公司 | Oil drilling mud saver valve |
| CN108999601A (en) * | 2018-07-26 | 2018-12-14 | 中国石油天然气股份有限公司 | A kind of chemical flooding dispensing well zonal flow rate deployment device and concocting method |
| CN108999601B (en) * | 2018-07-26 | 2021-04-13 | 中国石油天然气股份有限公司 | Chemical flooding separate injection well layered flow rate allocation method |
| CN112324404A (en) * | 2020-11-03 | 2021-02-05 | 中国石油化工股份有限公司 | Integrated intelligent water distribution system and method |
| CN113889300A (en) * | 2021-09-26 | 2022-01-04 | 西安蓝水泵业有限公司 | Well cable and well logging system |
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Application publication date: 20130522 |