CN111075409A - Concentric measure and regulate prevent returning and tell water injection device - Google Patents
Concentric measure and regulate prevent returning and tell water injection device Download PDFInfo
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- CN111075409A CN111075409A CN201911310361.5A CN201911310361A CN111075409A CN 111075409 A CN111075409 A CN 111075409A CN 201911310361 A CN201911310361 A CN 201911310361A CN 111075409 A CN111075409 A CN 111075409A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 103
- 239000007924 injection Substances 0.000 title claims abstract description 79
- 238000002347 injection Methods 0.000 title claims abstract description 79
- 230000007246 mechanism Effects 0.000 claims abstract description 59
- 238000005259 measurement Methods 0.000 claims abstract description 17
- 230000002265 prevention Effects 0.000 claims abstract 3
- 239000007788 liquid Substances 0.000 claims description 21
- 230000033001 locomotion Effects 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 239000002332 oil field water Substances 0.000 abstract description 3
- 239000008398 formation water Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 16
- 239000010410 layer Substances 0.000 description 14
- 238000012360 testing method Methods 0.000 description 13
- 239000003921 oil Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 9
- 238000009826 distribution Methods 0.000 description 6
- 238000005406 washing Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 206010067171 Regurgitation Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a concentric regulation and backflow prevention water injection device which comprises an upper connector, a valve outer sleeve and a lower connector, wherein a lead-in pen point assembly is arranged in the valve outer sleeve, a bridge type chuck is arranged outside the lower end of the lead-in pen point assembly, an adjusting mechanism is arranged in the lead-in pen point assembly, the upper end of the adjusting mechanism is spliced with the lead-in pen point assembly, and the lower end of the adjusting mechanism is spliced with a gear assembly; axial cavities are uniformly distributed on the side wall of the lower connector, an anti-backflow mechanism is arranged below each axial cavity, a valve core sleeve is arranged in each axial cavity, a gear end cover, a worm gear mechanism, a gear seat and a water nozzle assembly are arranged in each valve core sleeve, the upper end of the worm gear mechanism is meshed with the gear assembly, and the lower end of the worm gear mechanism is connected with the water nozzle core shaft; the lateral wall of the lower joint is provided with a bypass flow channel, the upper end of the bypass flow channel is communicated with the circumferential hole of the bridge chuck, and the lower end of the bypass flow channel is communicated with the inside of the lower joint. The invention has the characteristics of large injection amount, adjustable injection amount and formation water backflow prevention after stopping injection, realizes layered water injection measurement and adjustment and multi-layer injection, realizes subdivision of water injection layer sections, and improves the oil displacement effect of oil field water injection.
Description
Technical Field
The invention relates to the technical field of downhole tools for water-drive production increasing processes in oil fields, in particular to a concentric measuring and adjusting backflow-preventing water injection device.
Background
In the process of oil field exploitation, water injection into an oil layer through a water injection well is an effective method for improving the recovery ratio of crude oil. Along with the improvement of the oil reservoir development level, the crude oil recovery rate can be improved through separate-layer water injection, and high-precision flow measurement and water injection quantity regulation (measurement and regulation for short) are synchronously realized by adopting a bridge type concentric water distributor in the separate-layer water injection process so as to adapt to the separate-layer water distribution requirement. It is seen that it is necessary to provide a bridge concentric water distributor for oilfield flooding.
In recent years, the water injection well measurement and adjustment integration technology is developed rapidly, the cable measurement and adjustment integration technology represented by Chinese patent ZL200910018261.5 concentric integrated measurement and adjustment water injection process and device is characterized in that a single-core steel wire cable is used for operating a winch, a measurement and adjustment instrument with a centralized (flow, pressure and temperature) tester, a positioning device and a power system is arranged in an adjustable water distribution device, and a test and adjustment instruction is sent out through ground control to complete test and adjustment work. Meanwhile, the technology is greatly influenced by well deviation and scales, and when the well deviation exceeds 50 degrees or the scales are serious, the measurement and the adjustment of an instrument are difficult.
Patent ZL201720216326.7 concentric anti-regurgitation water injection mandrel of bridge type, this water injection mandrel includes upper joint, connection urceolus, bridge type body and lower joint that connects in order. The side wall of the bridge type body is provided with a longitudinal through hole communicated with the lower joint and a radial through hole communicated with the inner cavity of the bridge type body. The upper part of the bridge type body is provided with a guide cylinder for positioning the measuring and adjusting instrument. A fixed water nozzle is arranged in the inner cavity of the bridge type body, and a water outlet communicated with the radial through hole is formed in the fixed water nozzle. The movable water nozzle is arranged in the guide cylinder in a threaded transmission mode and moves up and down to change the flow area of the water outlet. The well deviation is influenced and the scale formation is large, and when the well deviation exceeds 50 degrees or the scale formation is serious, the measurement and the adjustment of an instrument are difficult.
A cable direct control water distribution method represented by a patent ZL2013100095011 control device for underground layered flow of a water injection well is one of layered water distribution methods commonly used for water injection wells of oil fields at present: the method is characterized in that a cable is preset in a water distributor and is put into a shaft together with the water distributor, the water distributor comprises a flowmeter, a flow control valve and a pressure gauge, and the water distributor is allocated layer by layer in a ground control mode, so that the aim of layered water distribution is fulfilled. However, the method has the defects that the flow meter in the water distributor is complex in structure and high in manufacturing cost, so that the whole process cost is high, and the method cannot be popularized on a large scale.
In conclusion, the prior art solves the problem that the traditional hollow water distribution process is limited in the number of stages of layering, and realizes layering water injection without the number of stages. However, various problems are encountered in the later testing and adjusting process of the matched layered water injection tool, the well repairing efficiency is affected, the requirements of cost reduction and efficiency improvement of the offshore oil field cannot be met, and in order to better exert the water drive development effect, at present, a layered testing and adjusting water injection device suitable for the oil reservoir characteristics and the well completion characteristics of the offshore oil field water injection well is urgently needed to be developed.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a concentric testing and adjusting anti-backflow water injection device capable of preventing formation sand-containing liquid from entering a pipe column, and solves the problems that the number of water injection wells is gradually increased, the offshore water injection technology is limited by well deviation, the testing and adjusting of a water injection working barrel is difficult, the adjusting torque of a testing instrument cannot be further increased, and the requirement of offshore water injection cannot be met.
The purpose of the invention is realized by the following technical scheme.
The concentric measurement and adjustment backflow-prevention water injection device comprises a valve outer sleeve, wherein the upper end of the valve outer sleeve is connected with an upper connector through an internal thread, the lower end of the valve outer sleeve is connected with a lower connector through an internal thread, a leading-in pen point assembly is arranged in the valve outer sleeve, a bridge type chuck is arranged outside the lower end of the leading-in pen point assembly, an adjusting mechanism is arranged inside the lower end of the leading-in pen point assembly, the upper end of the adjusting mechanism is connected with the leading-in pen point assembly in an inserting mode, and the lower end of the;
axial cavities are uniformly distributed on the side wall of the lower joint, an anti-backflow mechanism is arranged at the lower part of each axial cavity, a valve core sleeve is arranged in each axial cavity, a gear end cover, a worm and gear mechanism, a gear seat and a water nozzle assembly are sequentially arranged in each valve core sleeve from top to bottom, the upper end of the worm and gear mechanism is meshed with a pinion of the gear assembly, the lower end of the worm and gear mechanism is righted through a bearing and then is connected with a water nozzle mandrel in the water nozzle assembly, the gear assembly is rotated through a rotation adjusting mechanism, and then the rotation motion is converted into the up-and-down motion between the water nozzle mandrel and the water;
the lower joint lateral wall is provided with the bypass runner, bypass runner upper end and bridge chuck's circumference trompil intercommunication, the inside intercommunication of lower extreme and lower joint lower extreme.
The leading-in nib subassembly is four nib structures, leading-in nib subassembly lower extreme inside is provided with the step for axial positioning adjustment mechanism, lower clutch upper end inner wall is provided with the step for the axial supports the gear assembly.
Bridge type chuck passes through screw thread and leading-in nib subassembly fixed connection, just bridge type chuck sets up between leading-in nib subassembly and valve overcoat, and is located the positive upper end of lower clutch.
The worm gear mechanism has a self-locking function, so that the relative movement distance in the water nozzle core shaft is limited; the gear assembly is matched with the worm gear mechanism to realize the function of converting rotary motion into linear motion.
The side walls of the lower joint and the valve core sleeve are provided with liquid outlets in one-to-one correspondence, the liquid outlets are communicated with the outside of the lower joint, and the liquid outlets are positioned on the water nozzle sleeve part.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
(1) the concentric measurement and adjustment anti-backflow water injection device is arranged in a well along with a water injection oil pipe and is inserted into a sealing combination to form a layered water injection pipe column, wherein the concentric measurement and adjustment anti-backflow water injection device can be adjusted through cable operation according to needs to meet the requirement of the injection allocation amount of an injection allocation layer, the measurement and adjustment of all layers is completed through one-time cable operation, the water nozzles in the working barrel are adjusted through measurement and adjustment to control the injection allocation amount of different layers, and layered allocation is realized. Is superior to the traditional steel wire operation casting and injection core preparation process, and saves the operation cost.
(2) The concentric measurement and adjustment backflow-prevention water injection device has the characteristics of small adjustment torque, large discharge capacity and multi-layer segment subdivision water injection, and the adjustment torque is not more than 10N.m under the condition that the well deviation is more than 50 degrees.
(3) The concentric testing, adjusting and backflow preventing water injection device is applied to multi-layer section water injection, compared with other injection allocation devices, the concentric testing, adjusting and backflow preventing water injection device can perform section testing, can meet both the requirements of fixed testing and hanging testing in the water injection process, and cannot affect the injection of other layer sections when testing a target stratum. The method can realize accurate detection of formation parameters and simultaneously ensure that the injection of other intervals is not influenced. And the bottom liquid can be prevented from entering the interior of the tubular column, and the well washing device is matched with other well washing devices, so that the well washing operation of the whole shaft without moving the tubular column is facilitated.
Drawings
FIG. 1 is a schematic structural diagram of a concentric measuring, adjusting and backflow preventing water injection device.
Reference numerals: 1-upper connector, 2-leading pen point component, 3-adjusting mechanism, 4-valve jacket, 5-bridge chuck, 6-gear end cover, 7-gear component, 8-worm gear mechanism, 9-gear seat, 10-valve core sleeve, 11-bearing, 12-water nozzle core shaft, 13-water nozzle sleeve, 14-backflow preventing mechanism and 15-lower connector.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in figure 1, the concentric measuring, adjusting and backflow preventing water injection device comprises a valve outer sleeve 4, wherein the upper end of the valve outer sleeve 4 is connected with an upper connector 1 through internal threads, and the lower end of the valve outer sleeve 4 is connected with a lower connector 15 through internal threads. Be provided with leading-in nib subassembly 2 in the valve overcoat 4, leading-in nib subassembly 2 lower extreme outside is provided with bridge type chuck 5, leading-in nib subassembly 2 lower extreme inside is provided with adjustment mechanism 3, 3 upper ends of adjustment mechanism are pegged graft with leading-in nib subassembly 2, and the lower extreme is pegged graft with the gear assembly 7 that sets up in the 15 upper end inner walls of lower clutch. Wherein, leading-in nib subassembly 2 is four nib structures, leading-in nib subassembly 2 lower extreme inside is provided with the step for axial positioning adjustment mechanism 3, the upper end inner wall of lower clutch 15 is provided with the step for axial support gear assembly 7. Bridge type chuck 5 passes through screw thread and leading-in nib subassembly 2 fixed connection, bridge type chuck 5 sets up between leading-in nib subassembly 2 and valve overcoat 4, and is located under the lower clutch 15 upper end.
Axial through hole has evenly been seted up along the circumference to bridge type chuck 5, lower clutch 15 lateral wall is provided with the bypass runner, bypass runner upper end and bridge type chuck 5's circumference trompil intercommunication, the inside intercommunication of lower extreme and lower clutch 15 lower extreme. The bypass flow channel, the adjusting mechanism 3 and the inner drift diameter of the lower joint 15 are two independent channels respectively, so that the layered injection of liquid is guaranteed, the interlayer interference during operation is reduced through the bypass flow channel, and the large-displacement injection of the liquid is guaranteed.
The lateral wall equipartition of lower clutch 15 is provided with the axial cavity, and every axial cavity lower part all is provided with prevents returning and tells mechanism 14, all is provided with case cover 10 in every axial cavity, has set gradually gear end cover 6, worm gear mechanism 8, gear seat 9 and water injection well choke subassembly from top to bottom in every case cover 10, the pinion toothing in worm gear mechanism 8 upper end and the gear subassembly 7, 8 lower extremes of worm gear mechanism link to each other with water injection well choke dabber 12 in the water injection well choke subassembly after rightting through bearing 11. The gear assembly 7 is rotated by the rotation adjusting mechanism 3, and then the rotation motion is converted into the up-and-down movement between the water nozzle mandrel 12 and the water nozzle sleeve 13 by the worm gear mechanism 8. The worm gear mechanism 8 has a self-locking function, so that the relative movement distance inside the water nozzle mandrel 12 is limited. The gear assembly 7 is matched with the worm gear mechanism 8 to realize the function of converting rotary motion into linear motion.
The side walls of the lower joint 15 and the valve core sleeve 10 are provided with liquid outlets in one-to-one correspondence, the liquid outlets are communicated with the outside of the lower joint 15, and the liquid outlets are positioned on the water nozzle sleeve 13. An injection channel which can be normally opened during water injection is formed between the backflow preventing mechanism 14 and the lower connector 15, and the backflow preventing mechanism 14 can prevent formation water from flowing reversely when water injection is stopped, so that the backflow preventing function is realized.
When the gear assembly 7 is adjusted by using the measuring and adjusting instrument, the worm gear mechanism 8 is uniformly distributed around the gear assembly 7, so that the working torque required by uniform stress is smaller, and the concentric measuring and adjusting working barrel water nozzle is convenient to adjust when the well is inclined too much.
The upper joint 1 and the leading pen point component 2 form a measuring and adjusting tool leading-in mechanism of the invention, the joint mechanism 3, the gear end cover 6, the gear component 7, the worm gear mechanism 8, the gear seat 9, the valve core sleeve 10, the bearing 11, the water nozzle core shaft 12 and the water nozzle sleeve 13 form an injection amount adjusting mechanism of the invention, and the anti-backflow mechanism (14) and the lower joint 15 form an anti-backflow mechanism of the invention.
During normal water injection, liquid flows in from the upper connector 1, when flowing through the leading-in pen point component 2, a part of liquid enters the bypass flow channel along the circumferential opening of the bridge type chuck 5 connected with the leading-in pen point component 2 and flows into the next layer, and a part of liquid flows through the adjusting mechanism 3 and enters the center of the lower connector 15.
And when a gap is formed between the water nozzle sleeve 13 of the water nozzle assembly and the water nozzle mandrel 12, the liquid enters the stratum after overcoming the power assistance of the stratum. The liquid that gets into water injection well choke subassembly can satisfy the pressure requirement on stratum through the step-down, prevents returning simultaneously to tell mechanism 14 and can prevent that stratum fluid from entering into the tubular column inside, when stratum pressure is greater than the inside injection pressure of tubular column, prevents returning the check valve of telling mechanism 14 and dies the hole on the lower clutch under the effect of spring stifled, guarantees that stratum fluid can't enter into the inside of device to the function of returning telling has been realized.
When the stratum injection amount needs to be changed, a measuring and adjusting instrument matched with the device can be put in, the measuring and adjusting instrument is positioned by the leading-in pen point component 2 and is in butt joint with the adjusting mechanism 3, at the moment, the injected liquid can enter other stratums through the bypass flow channel, and the other stratums can be injected normally. The measuring and adjusting instrument drives the adjusting mechanism 3 to rotate, meanwhile, the adjusting mechanism 3 drives the gear assembly 7 to rotate and enables the water nozzle core shaft 12 to move up and down under the righting of the bearing 11 through the worm gear mechanism 8, so that the size of the injection allocation flow channel is changed, the adjustment of liquid injection allocation amount is further realized, and the requirement of stratified injection on large-displacement injection is met.
The invention solves the problems of high workover operation cost and poor oil displacement effect caused by difficult adjustment and high cost of an injection tool matched with an offshore oilfield water injection process. Compared with the existing stratified water injection device, the present invention has low operation cost and is suitable for the current international situation of low oil price. The concentric measurement and adjustment backflow-prevention water injection device has the characteristics of small adjustment torque, large discharge capacity and multi-layer segment subdivision water injection, and the adjustment torque is not more than 10N.m under the condition that the well deviation is more than 50 degrees. The problem of difficulty in offshore oilfield flooding at present can be solved, and the oil displacement effect is improved. Meanwhile, bottom liquid can be prevented from entering the interior of the tubular column, and the tubular column is matched with other well washing devices, so that the well washing operation of the whole shaft without moving the tubular column is facilitated.
While the present invention has been described in terms of its functions and operations with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise functions and operations described above, and that the above-described embodiments are illustrative rather than restrictive, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope or spirit of the invention as defined by the appended claims.
Claims (5)
1. The concentric regulation backflow-preventing water injection device comprises a valve outer sleeve (4), wherein the upper end of the valve outer sleeve (4) is connected with an upper connector (1) through an internal thread, and the lower end of the valve outer sleeve (4) is connected with a lower connector (15) through an internal thread, and the concentric regulation backflow-preventing water injection device is characterized in that a leading-in pen point assembly (2) is arranged in the valve outer sleeve (4), a bridge type chuck (5) is arranged outside the lower end of the leading-in pen point assembly (2), an adjusting mechanism (3) is arranged inside the lower end of the leading-in pen point assembly (2), the upper end of the adjusting mechanism (3) is spliced with the leading-in pen point assembly (2), and the lower end of;
axial cavities are uniformly distributed in the side wall of the lower joint (15), an anti-backflow mechanism (14) is arranged at the lower part of each axial cavity, a valve core sleeve (10) is arranged in each axial cavity, a gear end cover (6), a worm gear mechanism (8), a gear seat (9) and a water nozzle assembly are sequentially arranged in each valve core sleeve (10) from top to bottom, the upper end of the worm gear mechanism (8) is meshed with a pinion of the gear assembly (7), the lower end of the worm gear mechanism (8) is righted through a bearing (11) and then is connected with a water nozzle spindle (12) in the water nozzle assembly, the gear assembly (7) is rotated through a rotation adjusting mechanism (3), and then the rotation motion is converted into up-down movement between the water nozzle spindle (12) and the water nozzle sleeve (13) through the worm gear mechanism (8);
the lateral wall of the lower joint (15) is provided with a bypass flow channel, the upper end of the bypass flow channel is communicated with a circumferential hole of the bridge chuck (5), and the lower end of the bypass flow channel is communicated with the inside of the lower end of the lower joint (15).
2. The concentric metering, adjusting and backflow-preventing water injection device as claimed in claim 1, wherein the leading-in pen tip assembly (2) is of a four-pen-tip structure, a step is arranged inside the lower end of the leading-in pen tip assembly (2) and used for axially positioning the adjusting mechanism (3), and a step is arranged on the inner wall of the upper end of the lower joint (15) and used for axially supporting the gear assembly (7).
3. The concentric metering, regulating and backflow-preventing water injection device as claimed in claim 1, wherein the bridge chuck (5) is fixedly connected with the introduction pen point component (2) through threads, and the bridge chuck (5) is arranged between the introduction pen point component (2) and the valve housing (4) and is positioned right above the lower connector (15).
4. The concentric regulation and control backflow-preventing water injection device as claimed in claim 1, wherein the worm gear mechanism (8) has a self-locking function, so that the relative movement distance inside the water nozzle mandrel (12) is limited; the gear assembly (7) is matched with the worm gear mechanism (8) to realize the function of converting the rotary motion into the linear motion.
5. The concentric measurement, adjustment and backflow prevention water injection device according to claim 1, wherein the side walls of the lower joint (15) and the valve core sleeve (10) are provided with liquid outlets which correspond to each other one by one, the liquid outlets are communicated with the outside of the lower joint (15), and the liquid outlets are located on the water nozzle sleeve (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911310361.5A CN111075409A (en) | 2019-12-18 | 2019-12-18 | Concentric measure and regulate prevent returning and tell water injection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911310361.5A CN111075409A (en) | 2019-12-18 | 2019-12-18 | Concentric measure and regulate prevent returning and tell water injection device |
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| Publication Number | Publication Date |
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| CN111075409A true CN111075409A (en) | 2020-04-28 |
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| CN201911310361.5A Pending CN111075409A (en) | 2019-12-18 | 2019-12-18 | Concentric measure and regulate prevent returning and tell water injection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306360A (en) * | 2022-09-20 | 2022-11-08 | 西安石油大学 | Eccentric intelligent water distributor of measurement and control integrated water injection well |
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| CN109555507A (en) * | 2019-01-30 | 2019-04-02 | 西安思坦仪器股份有限公司 | A kind of adjustable concentric roater regulator of constant current |
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2019
- 2019-12-18 CN CN201911310361.5A patent/CN111075409A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115306360A (en) * | 2022-09-20 | 2022-11-08 | 西安石油大学 | Eccentric intelligent water distributor of measurement and control integrated water injection well |
| CN115306360B (en) * | 2022-09-20 | 2024-04-30 | 西安石油大学 | Measurement and control integrated water injection well eccentric intelligent water distributor |
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Application publication date: 20200428 |