CN101798912B - Device and method for regulating and controlling water content of production fluid of underground layering of oil field - Google Patents
Device and method for regulating and controlling water content of production fluid of underground layering of oil field Download PDFInfo
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- CN101798912B CN101798912B CN2010101274706A CN201010127470A CN101798912B CN 101798912 B CN101798912 B CN 101798912B CN 2010101274706 A CN2010101274706 A CN 2010101274706A CN 201010127470 A CN201010127470 A CN 201010127470A CN 101798912 B CN101798912 B CN 101798912B
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Abstract
The invention discloses a device for regulating and controlling the water content of the production fluid of an underground layering of an oil field, which comprises a main control assembly, a slide bushing switch and a water content tester, wherein the slide bushing switch is arranged in the main control assembly, and the water content tester is connected with the main control assembly and is used for testing the water content of an oil-water mixture; the main control assembly is used for controlling the opening and the closing of the slide bushing switch according to a test result of the water content; when the condition that the water content is higher than a set value is judged, the slide bushing switch is closed so as to prohibit the pass of the oil-water mixture; and when the condition that the water content is lower than the set value is judged, the slide bushing switch is opened so as to permit the pass of the oil-water mixture. By connecting the device provided by the invention in a layered oil recovery pipe column in series and delivering the device to an underground oil layer, the water content tester can automatically detect the water content of the oil-water mixture. According to the actually detected water content, the slide bushing switch is opened or closed so as to open or close a fluid inlet passage, so that the dynamic regulation and control of the water content of the production fluid of the underground layering of the oil field is realized.
Description
Technical field
The present invention relates to oil extraction in oil field engineering process control technique field, more particularly, relate to a kind of water content of production fluid of underground layering of oil field regulation device and method.
Background technology
Continuous growth along with science and technology, the development technique of oil field at home enters waterflood stage already, described waterflooding oil field, the crude oil that namely utilizes the high-pressure injected water in water injection well to drive in each reservoir of oil field flows in oil well, to in the oil-water mixture pumping, come again, after the sedimentation of surface settlement tank, enter after apparatus for electrodewatering dewaters and obtain crude oil.
Due to long-term injecting water; the physical parameter of oilfield reservoir (degree of porosity, saturation ratio and permeability) can change; the acid fracturing construction of in addition carrying out for the increase production capacity in oil well all can cause oilfield reservoir and country rock fracture development; often can produce the injected water individual layer advances by leaps and bounds; the phenomenons such as interlayer water breakthrough groove; cause a large amount of water outlets of some series of strata in oil well, even water logging stops production.
For addressing the above problem, various measures were taked at the oil scene, and if observed at any time the moisture variation of produced liquid in oil well, then pressure and the water yield of each water filling layer in Artificial Control and adjustment water injection well, expect the moisture content in oil well liquid-producing is lowered.But, due to a bite well be simultaneously around many mouthfuls of flushings, and each oil well production state has nothing in common with each other, and adopts the adjustment cycle of Artificial Control method to grow, take effect slowly, even produce little effect.
Because the oil well of domestic separate zone production is to utilize packer separated from one another each oil reservoir of down-hole, so, in prior art, also exist and a kind ofly utilize production mandrel equipped in each oil reservoir to control the method that flows into the flow in pit shaft.When at the ground well head, finding this well production fluid Water-Content Rise, by successively changing in production mandrel, join produce oil and chew (comprise extremely and chewing) bore and judge main water exit, then this layer is changed extremely and chewed, make height contain aquaculture solution and can't flow into pit shaft.
But in said method, due to replacing, joining that produce oil chews is artificial mechanism formula operation fully, needs repeated multiple times operation, like this, has just caused construction cost high, account for the long and low problem of economic timeliness of well cycle.Especially also there is a major issue, namely change each layer oil and chew bore and just separate layer fluid production rate is played to certain corrective action, can't change stratum and flow into the production fluid moisture content in pit shaft.
In sum, now in the urgent need to a kind of water content of production fluid of underground layering regulation device, replace domestic traditional water and oil control technology at present, realize the dynamic regulation to water content of production fluid of underground layering of oil field.
Summary of the invention
In view of this, the invention provides a kind of water content of production fluid of underground layering of oil field regulation device and method, to realize the purpose to the dynamic regulation of water content of production fluid of underground layering of oil field.
Described water content of production fluid of underground layering of oil field regulation device comprises: the master control assembly, be arranged on the sliding sleeve switch in described master control assembly, and the detector for water content rate be connected with described master control assembly, wherein:
Described detector for water content rate, for the moisture content of test oil water mixed liquid;
Described master control assembly, for the test result according to moisture content, control the open and close of described sliding sleeve switch, when judging that moisture content is higher than setting value, close described sliding sleeve switch and then stop described oil-water mixture to pass through, when the judgement moisture content, lower than setting value, open described sliding sleeve switch and then allow described oil-water mixture to pass through.
Preferably, also comprise pressure sensor, be used to receiving pressure pulse and being transmitted in the master control assembly, the master control assembly is revised and is generated new setting value according to described pressure pulse.
Preferably, described master control assembly comprises:
Control device, be used to receiving the test result of oil-water mixture moisture content, by itself and the setting value rear sending controling instruction of comparing;
Drive unit, drive sliding sleeve switch for the control instruction according to control device and open and close.
Preferably, described drive unit comprises:
Top connection, lower contact and the main casing all be tightly connected with described top connection and lower contact, described top connection inside has the feed liquor duct, and its underpart is installed with central tube, on described main casing, is provided with 4 outer tube inlet openings;
Be arranged on described central tube plunger, ball screw, thrust bearing, shaft coupling and reducing motor inner, that be connected successively, described plunger can move along described central tube axial direction.
Preferably, described control device comprises:
Input block, set value in SCM system be used to inputting;
SCM system, be used to receiving the test result of oil-water mixture moisture content, by itself and the setting value rear sending controling instruction of comparing.
Preferably, described sliding sleeve switch comprises:
Be fixed on described plunger, can move and mobile sliding sleeve support arm with described plunger;
By described sliding sleeve support arm, be connected to the sleeve body on described plunger, on described sleeve body, be provided with 4 with the isometrical sliding sleeve inlet opening of outer tube inlet opening.
Preferably, described top connection and lower contact all are set to the tubing round thread structure.
Preferably, described detector for water content rate comprises: upper seal head, lower seal head and the instrument storehouse be threaded with described upper and lower seal head, wherein:
In described instrument storehouse, be placed with successively the low energy of radioactivity, crystal, photomultiplier, high tension transformer, electronic circuit and battery, and, all by connector, be connected between described crystal, photomultiplier, high tension transformer, electronic circuit and battery;
On described lower seal head, be provided with the line sealing-plug.
Described water content of production fluid of underground layering of oil field regulate and control method comprises:
Moisture content in the test oil water mixed liquid;
Contrast moisture content and the setting value of described test, when judging that moisture content is higher than setting value, close described sliding sleeve switch and then stop described oil-water mixture to pass through,, lower than setting value, open described sliding sleeve switch and then allow described oil-water mixture to pass through when the judgement moisture content.
Preferably, when needs are revised setting value, also comprise: receive pressure pulse, generate new setting value according to described pressure pulse.
From above-mentioned technical scheme, can find out, by by device serial connection provided by the invention in separate-layer production string down to the down-hole oil reservoir, detector for water content rate can detect the moisture content of oil-water mixture automatically.When finding moisture content higher than setting value, just by controlling sliding sleeve switch, automatically shut down feed pathway, make the oil-water mixture in stratum can't flow in pit shaft; Otherwise, by controlling sliding sleeve switch, open feed pathway, realized the dynamic regulation to water content of production fluid of underground layering of oil field.
The accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the electrical connection schematic diagram of the disclosed a kind of water content of production fluid of underground layering of oil field regulation device of the embodiment of the present invention;
Fig. 2 is the schematic diagram of the disclosed a kind of master control assembly of the embodiment of the present invention;
Fig. 3 is the front view of the disclosed a kind of water content of production fluid of underground layering of oil field regulation device of the embodiment of the present invention;
Fig. 4 is the A-A line sectional view of Fig. 3;
Fig. 5 is the front view of the disclosed a kind of detector for water content rate of the embodiment of the present invention;
Fig. 6 is the flow chart of the disclosed a kind of water content of production fluid of underground layering of oil field regulate and control method of the embodiment of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.
The embodiment of the invention discloses a kind of water content of production fluid of underground layering of oil field regulation device, to realize the purpose to the dynamic regulation of water content of production fluid of underground layering of oil field.
Referring to Fig. 1, described water content of production fluid of underground layering of oil field regulation device comprises: master control assembly 102, be arranged on the sliding sleeve switch 103 in master control assembly 102, and the detector for water content rate 101 be connected with master control assembly 102, wherein:
Detector for water content rate 101, for the moisture content of test oil water mixed liquid;
While using this device, first this device is connected in the well recovery tubing string, concrete, owing in this tubing string, utilizing a plurality of packers that several oil reservoirs of down-hole are separated into separately to independently individual layer, and this device of all connecting in each individual layer.Oil-water mixture A in each individual layer flow in pit shaft, and the moisture content of 101 pairs of mixed liquor A of detector for water content rate is tested, and test data is sent to master control assembly 102.Master control assembly 102 judges whether to make sliding sleeve switch 103 actions.When surveying moisture content higher than setting value, allow sliding sleeve switch 103 close, the mixed liquor A in pit shaft can't flow in flow string; When moisture content, lower than when setting value, allow sliding sleeve switch 103 open, the mixed liquor A in pit shaft flow in flow string and becomes produced liquid in oil well by defeated in pumping.
With reference to Fig. 1, when needs were readjusted the moisture threshold value of master control assembly 102 interior settings, described water content of production fluid of underground layering of oil field regulation device also comprised pressure sensor 104 equally, for the space of economy system, it can be positioned over to master control assembly 102 inside.Utilize the ground pump truck pulse B that exerts pressure, pressure pulse B sends in master control assembly 102 and carries out instruction decoding after by pressure sensor 104, being received, and finally forms new moisture threshold value.
Concrete, as shown in Figure 2, master control assembly 102 comprises: control device 211 and drive unit 212, and wherein, control device 211, be used to receiving the test result of oil-water mixture moisture content, by itself and the setting value rear sending controling instruction of comparing; Drive unit 212, drive sliding sleeve switch 103 for the control instruction according to control device and open and close.
And control device 211 comprises: input block sets value in SCM system be used to inputting; SCM system, be used to receiving the test result of oil-water mixture moisture content, by itself and the setting value rear sending controling instruction of comparing.
Below by an embodiment, the concrete structure of water content of production fluid of underground layering of oil field regulation device is described.
Structure as shown in Figure 3, drive unit 212 comprises: top connection 21, lower contact 22, with its main casing be tightly connected respectively 23 and be arranged at the central tube 24 in main casing 23, and top connection 21 adopts engage thread to be tightened to one with central tube 24.
There is circular arc liquid pass hole road 1 top connection 21 inside, and as shown in Figure 4, each layer of well recovery tubing string production fluid can flow through in main casing 23 and the formed annular space of central tube 24 and circular arc liquid pass hole road 1.And the ground pump truck pulse of exerting pressure also acts on pressure sensor 104 by this runner.
Central tube 24 inside are equipped with plunger 29, on plunger 29, are connected with ball screw 34, and the ball screw afterbody is fixed with thrust bearing 35, and thrust bearing 35 is connected with reducing motor 37 line shafts by shaft coupling 36.Concrete, on plunger 29, O shape cushion rubber is being worn in embedding, and the external high pressure fluid can not be invaded in the annular seal space of central tube 24.Packed air compressing chamber is stayed on the top of plunger 29, thereby makes plunger 29 keep in the axial direction pressure balance, and reducing motor 37 can be worked under the axial compression equilibrium conditions.
The course of work of drive unit 212 is: reducing motor 37 running, its line shaft drive shaft coupling 36 actions, act on ball screw 34 by thrust bearing 35, ball screw 34 rotations promote plungers 29 central tube 24 axially on make upper and lower translation.
The controlled device 211 of the action of drive unit 212 regulates and controls, and specifically regulates and controls the moving direction of plunger 29.Control device 211 comprises: SCM system 25, battery 26 and the socket communication 27 of power supply are provided for SCM system, and wherein, battery 26 is connected with SCM system 25 by connector 135, and socket communication 27 is input block.
For the ease of input block input data, central tube 24 is placed the control device end and is the opening setting, sealing tail cap 28 is installed, to realize closure.
Before this device is gone into the well use, open main casing 23, screw off sealing tail cap 28.Socket communication 27 is used to communication cable and computer interconnection.Utilize the artificial moisture content initial threshold arranged of computer input to SCM system 25, simultaneously sliding sleeve switch 103 is migrated to fastening position.After off line, again restore and install sealing tail cap 28 and main casing 23.
Because being positioned in the well recovery tubing string, this device utilize a plurality of packers that several oil reservoirs of down-hole are separated into separately independently in individual layer, in the artificial moisture content initial threshold arranged of input, also the layer position code clerk of device to be inputed to SCM system 25.
In the course of work of this device, SCM system 25 is the moisture content of the oil-water mixture of interior each individual layer generation of flow string of reception detector for water content rate 101 tests constantly, by itself and setting value, be that the moisture content initial threshold is compared, according to comparison result, send control instruction, accessory drive 212 actions.
Drive unit 212 actions can realize the open and close of sliding sleeve switch 103, sliding sleeve switch 103 comprises: sleeve body 31 and 4 sliding sleeve support arms 33, wherein, sliding sleeve support arm 33 is fixedly connected on plunger 29, on central tube 24, offer vertically four strip holes, 4 sliding sleeve support arms 33 move up and down along four strip holes respectively.Sleeve body 31 all is connected with 4 sliding sleeve support arms 33, and the outer wall of sleeve body 31 closely cooperates and contacts with main casing 23 inwalls.On sleeve body 31, setting-in O shape cushion rubber, the sealing between assurance and main casing 23 contact surfaces.
Concrete, on sleeve body 31, have four sliding sleeve inlet openings 32, on main casing 23, also have four outer tube inlet openings 30 isometrical with it.
Because sleeve body 31 is arranged on plunger 29 by sliding sleeve support arm 33, plunger 29 axially moves up and down and then drives sleeve body 31 along central tube 24 and moves up and down, when sleeve body 31 moved upward to a certain position, the sliding sleeve inlet opening 32 on it can overlap with outer tube inlet opening 30.Now can make the oil-water mixture that in flow string, each individual layer produces flow into main casing 23 inside.Otherwise when sleeve body 31 moved downward a certain position, the sliding sleeve inlet opening 32 on it staggered fully with outer tube inlet opening 30, the oil-water mixture that now in flow string, each individual layer produces can't flow into main casing 23 inside.
Due to this device serial connection in flow string, in order to improve seal, meet oil standardization requirement, so, top connection 21 and lower contact 22 all are set to the tubing round thread structure, top connection 21 and lower contact 22 are adopted the tubing round thread mode to spin with upper lower packet and are integral, and this kind structure has self sealing action after also making to screw with upper lower packet.
In conjunction with Fig. 3 and Fig. 5, generally, detector for water content rate 101 is arranged in the groove of main casing 23 outsides, utilize respectively upper fixture block 1011, lower fixture block 1012 to be fixed on main casing 23, its concrete structure as shown in Figure 3, comprising: upper seal head 11, lower seal head 12 and the instrument storehouse 13 be threaded with upper seal head 11, lower seal head 12, and concrete, for the booster seal, upper seal head 11, lower seal head 12 respectively with 13De junction, instrument storehouse also embedding wear O shape cushion rubber; Wherein:
Instrument storehouse 13 is divided into upper and lower two annular seal spaces, in the upper annular seal space in instrument storehouse 13, be provided with the low energy 131 of radiation, in the lower seal chamber, be disposed with crystal 133, photomultiplier 134, high tension transformer 136, electronic circuit 137 and battery 138, and, all by connector 135, be connected between crystal 133, photomultiplier 134, electronic circuit 137 and battery 138; On lower seal head 12, be provided with line sealing-plug 121.
On the instrument storehouse 13 of detector for water content rate 101, also offer one and connect inlet opening 132, its aperture is identical with the outer tube inlet opening 30 of main casing 23, and its installation site and outer tube inlet opening 30 coincide mutually.
Detector for water content rate 101 is arranged in the groove of main casing 23 outsides, generally be in oil reservoir, in oil reservoir, be full of the oil-water mixture of different proportion, described oil-water mixture constantly flows into and connects inlet opening 132, and now, radiation hangs down the energy 131 radiating light subflows, after entering described oil-water mixture, received by crystal 133, through photomultiplier 134, be converted to electron stream, electronic circuit 137 forms the moisture content signal of telecommunication after it is processed, and finally by line sealing-plug 121, is transmitted.
Line sealing-plug 121 is connected with master control assembly 102 by cable, specifically with SCM system 25, is connected, and SCM system 25 receives the moisture content signal of telecommunication, and itself and setting value are compared, and carries out subsequent operation according to comparison result.
In said process, battery 138, for the work of all parts provides power supply, arranges high tension transformer 136, raises and forms the operating voltage of photomultiplier 134 for the voltage by battery 138.
It should be noted that, the detector for water content rate 101 in the embodiment of the present invention adopts unitary structure, is convenient to assembling and the adjustment calibrating of instrument.And detector for water content rate 101 is developed according to the photoelectric effect in atomistics.Have that broad quantum, precision are high, fast response time and unique technical advantage such as be not subjected to that the fluid media (medium) admixture affects.As can be known according to photoelectric effect, when the photon sent when radioactive substance passed medium, the intensity of its ray was index law and weakens, due to the absorption coefficient difference of different medium to ray, after when ray, passing the oil-water mixture of different volumes ratio, the transmitted intensity and the oil-water ratio that receive are proportional.The low energy of the radioactivity that detector for water content rate 101 in the present invention is used is cadmium 109(Cd109).
The embodiment of the present invention also provides a kind of water content of production fluid of underground layering of oil field regulate and control method, as shown in Figure 6, comprises step:
Moisture content in S1, test oil water mixed liquid;
Detector for water content rate 101 Automatic continuous are measured the production fluid moisture content of layer of living in position, and measured value is delivered to SCM system 25.
S2, described moisture content and setting value are compared,, higher than setting value, execution step S3, closed sliding sleeve switch 103 and then stop described oil-water mixture to pass through when the judgement moisture content; When the judgement moisture content, lower than setting value, perform step S4, open sliding sleeve switch 103 and then allow described oil-water mixture to pass through.
And whether the automatic inquiry of SCM system 25 revises setting value.Though when ground pump truck does not apply voltage-controlled pulse or applies pulse but a layer position code clerk while not conforming to this bed device code clerk to pit shaft, former setting value is constant; Otherwise when the layer position code clerk in pressure pulse conformed to this bed device code clerk, the moisture content threshold value code that will receive was decoded, SCM system 25 reaches former setting value of generation by decoded new threshold value.
Concrete, the pump truck pressurization produces pressure pulse, and forward part represents layer position code clerk, be used to selecting the downhole hardware of which layer, the new moisture threshold value that the rear section representative arranges.
In sum, the water content of production fluid of underground layering of oil field regulation device that the embodiment of the present invention provides, in layer position, down-hole, can automatically complete the oil-water mixture moisture content and detect, and open or close accordingly down-hole individual layer production fluid passage, realize the dynamic regulation of water content of production fluid of underground layering.
In this manual, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.Multiple modification to these embodiment will be apparent for those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, realization in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (4)
1. water content of production fluid of underground layering of oil field regulation device, it is characterized in that, described device is connected with the well recovery tubing string of arbitrary individual layer, and this device comprises: the master control assembly, be arranged on the sliding sleeve switch in described master control assembly, and the detector for water content rate be connected with described master control assembly, wherein:
Described detector for water content rate, for the moisture content of test oil water mixed liquid;
Described master control assembly, for the test result according to moisture content, control the open and close of described sliding sleeve switch, when judging that moisture content is higher than setting value, close described sliding sleeve switch and then stop described oil-water mixture to pass through, when the judgement moisture content, lower than setting value, open described sliding sleeve switch and then allow described oil-water mixture to pass through;
Pressure sensor, be used to receiving pressure pulse and being transmitted in the master control assembly, make the master control assembly revise and generate new setting value according to described pressure pulse;
Wherein, described master control assembly comprises: control device and drive unit;
Described control device, be used to receiving the test result of oil-water mixture moisture content, by itself and the setting value rear sending controling instruction of comparing;
Described drive unit comprises: top connection, lower contact and the main casing all be tightly connected with described top connection and lower contact, described top connection inside has the feed liquor duct, its underpart is installed with central tube, on described main casing, be provided with 4 outer tube inlet openings, be arranged on described central tube plunger, ball screw, thrust bearing, shaft coupling and reducing motor inner, that be connected successively, described plunger can move along described central tube axial direction, and this drive unit drives sliding sleeve switch for the control instruction according to control device and opens and closes;
Wherein, described sliding sleeve switch comprises:
Be fixed on described plunger, can move and mobile sliding sleeve support arm with described plunger;
By described sliding sleeve support arm, be connected to the sleeve body on described plunger, on described sleeve body, be provided with 4 with the isometrical sliding sleeve inlet opening of outer tube inlet opening;
Described detector for water content rate comprises: upper seal head, lower seal head and the instrument storehouse be threaded with described upper and lower seal head, described instrument storehouse is provided with the perforation inlet opening, wherein: in described instrument storehouse, be placed with successively the low energy of radioactivity, crystal, photomultiplier, high tension transformer, electronic circuit and battery, and, all by connector, be connected between described crystal, photomultiplier, high tension transformer, electronic circuit and battery; On described lower seal head, be provided with the line sealing-plug;
The test process of described detector for water content rate is: described oil-water mixture flows through the instrument storehouse by connecting inlet opening, the radiating light subflow of the low energy of radioactivity is received by crystal by after described oil-water mixture, through photomultiplier tube, be converted to electron stream, electronic circuit forms the moisture content signal of telecommunication after described electron stream is processed.
2. device according to claim 1, is characterized in that, described control device comprises:
Input block, set value in SCM system be used to inputting;
SCM system, be used to receiving the test result of oil-water mixture moisture content, by itself and the setting value rear sending controling instruction of comparing.
3. device according to claim 1, is characterized in that, described top connection and lower contact all are set to the tubing round thread structure.
4. a water content of production fluid of underground layering of oil field regulate and control method, be applied to, as in the described device of claim 1-3 any one, it is characterized in that, comprising:
Moisture content in the test oil water mixed liquid;
Contrast moisture content and the setting value of described test,, higher than setting value, close sliding sleeve switch and then stop described oil-water mixture to pass through when the judgement moisture content,, lower than setting value, open described sliding sleeve switch and then allow described oil-water mixture to pass through when the judgement moisture content;
When needs are revised setting value, receive pressure pulse, according to described pressure pulse, generate new setting value;
Wherein, moisture content in the test oil water mixed liquid specifically comprises: described oil-water mixture flows through the instrument storehouse by connecting inlet opening, the radiating light subflow of the low energy of radioactivity is received by crystal by after described oil-water mixture, through photomultiplier tube, be converted to electron stream, electronic circuit forms the moisture content signal of telecommunication after described electron stream is processed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101274706A CN101798912B (en) | 2010-03-19 | 2010-03-19 | Device and method for regulating and controlling water content of production fluid of underground layering of oil field |
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| CN2010101274706A CN101798912B (en) | 2010-03-19 | 2010-03-19 | Device and method for regulating and controlling water content of production fluid of underground layering of oil field |
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| CN102418500B (en) * | 2011-12-19 | 2015-01-28 | 中国石油天然气股份有限公司 | Directly controlled continuous quantitative layered production allocation oil pipe column |
| EP2982828A1 (en) * | 2014-08-08 | 2016-02-10 | Welltec A/S | Downhole valve system |
| CN106437576B (en) * | 2015-08-13 | 2018-12-28 | 中国石油化工股份有限公司 | A kind of electronic by-passing valve |
| GB2566953B (en) * | 2017-09-27 | 2021-01-20 | Swellfix Uk Ltd | Method and apparatus for controlling downhole water production |
| CN113202465B (en) * | 2021-06-08 | 2022-11-11 | 长春市斯普瑞新技术有限责任公司 | Sliding sleeve closed type underground sampler |
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| US4616700A (en) * | 1984-09-18 | 1986-10-14 | Hydril Company | Automatic well test system and method |
| CN2638066Y (en) * | 2003-08-21 | 2004-09-01 | 中国石油天然气股份有限公司 | Hydraulic pump under well storage type water ratio tester |
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| RU2344272C2 (en) * | 2007-03-14 | 2009-01-20 | Общество с ограниченной ответственностью "Самараойл" | Well structure and method of multipay oil pool development |
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| CN100540841C (en) * | 2007-02-08 | 2009-09-16 | 兰群 | Producing well derailing switch water detection under production status, ask and produce and shutoff method |
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| US4616700A (en) * | 1984-09-18 | 1986-10-14 | Hydril Company | Automatic well test system and method |
| CN2638066Y (en) * | 2003-08-21 | 2004-09-01 | 中国石油天然气股份有限公司 | Hydraulic pump under well storage type water ratio tester |
| CN2814411Y (en) * | 2005-08-20 | 2006-09-06 | 朱广升 | Inserting magnetic erasing water content analyzer |
| CN2878672Y (en) * | 2006-01-18 | 2007-03-14 | 王晓东 | Under-well lamination controller for oil well |
| RU2344272C2 (en) * | 2007-03-14 | 2009-01-20 | Общество с ограниченной ответственностью "Самараойл" | Well structure and method of multipay oil pool development |
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