CN106437616A - Reagent injection tool for oil field water control and oil stabilizing process measure operation - Google Patents
Reagent injection tool for oil field water control and oil stabilizing process measure operation Download PDFInfo
- Publication number
- CN106437616A CN106437616A CN201610980654.4A CN201610980654A CN106437616A CN 106437616 A CN106437616 A CN 106437616A CN 201610980654 A CN201610980654 A CN 201610980654A CN 106437616 A CN106437616 A CN 106437616A
- Authority
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- China
- Prior art keywords
- injection valve
- block
- spring
- valve body
- sealing drum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/138—Plastering the borehole wall; Injecting into the formation
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
Abstract
The invention relates to a reagent injection tool for oil field water control and oil stabilizing process measure operation. Two sections of the tool are connected with an oil tubular column and a matched tool respectively, a circular hole is formed in the inner wall of the tool, a soluble part is arranged, the dissolution time of the soluble part is limited within preset time, the inner cavity of the tool is in a sealed state within the preset time, and pressing work can be carried out; after the soluble tool is dissolved, reagent injection work is carried out, a reagent enters the annular cavity of the tool through the circular hole in the inner wall of the tool, the reagent pushes a movable piston to move and presses a spring, a seal cylinder is connected with the movable piston, and the movable piston drives the seal cylinder to switch on a chemical reagent injection valve; after reagent injection ends, the pressure difference of the inside and the outside of the tool is zero, the spring rebounds and pushes the movable piston to return, and the chemical reagent injection valve is switched off. Timed locking, one-way injecting, synchronous switching-on or switching-off and long-term storing of the chemical reagent injection valve can be achieved.
Description
Technical field
The invention belongs to oil well operation technical field of tools, in particular to a kind of oil field that is used for from primary fluid flow control
The chemical agent implantation tool of valve.
Background technology
With the growth of oil field productive life, well water is gradually increasing, and oil production is gradually reduced；Oil field development has been entered
Enter high water cut stage, after oil well water breakthrough, aqueous ascensional range quickly, seriously constrains the Efficient Development in oil field；For adapting to offshore oil
Surely oil control water needs in field, and more and more pipe string technology technology being suitable for oilfield intelligent control water are developed, high for solving live oil field
There is provided new method containing water problems, and then realize high-water-cut oil-producing well water and oil control and meet the normal measure of oil well and production operation；Mesh
Before, being directed to the main method of horizontal well control water both at home and abroad is water pack off and chemical water shutoff, and wherein chemical water shutoff includes selectivity
Chemical water shutoff, conventional chemical water blockoff and general injection method water blockoff etc., water pack off includes electric pump well water blockoff, annular packer water blockoff
With autonomous fluid flow control valve (Autonomous Inflow Control Device, AICD) intelligent water-controlled technology etc..
Because AICD controls fluid can only carry out one-way flow in pipe from pipe, what current oil field was commonly used is sliding sleeve instrument
Circulation between control oil pipe and sleeve pipe, conventional wire technique is controlled everybody switch sliding, and oil well hole deviation more than 60 degree
When, steel wire operation cannot be carried out, and common ball-and-seat function is simple, also can not meet and carry out in pipe the wanting of measure such as being acidified
Ask, it is therefore desirable to develop a kind of supporting chemical agent implantation tool, realize high-water-cut oil-producing well especially horizontal well water and oil control
And meet the function of the measure operations such as oil well chemical medicament injection.After entering under AICD water control pipe post, need in oil field sand prevention section
It is layered using mechanical packer and chemical packer and carry out controlling water, so needing the downhole tools such as first base sealed packer, and seat
Seal pressure about 18MPa, common implantation tool no meets this performance requirement, nor realizes the synchronous injection opening every interval
The functional requirement of medicament.
Content of the invention
In view of this, it is contemplated that proposing a kind of chemical agent injection valve it is therefore intended that overcoming above-mentioned prior art
Deficiency, its can effectively solving the problems referred to above while, time-limited locking, unidirectional injection, synchronous be turned on and off, long-term storage,
Sealed reliable, simple and ingenious structure, assembling and a kind of convenient-to-running chemical agent injection valve instrument of execute-in-place.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that：
Two sections of described chemical agent injection valve instrument are connected with petroleum pipe column and kit respectively, and instrument inwall has
20 or several circular holes, are sealed by dissolvable part, and the dissolution time of resolvability part is limited in 4 to 7 days, at this moment
Interior instrument inner chamber is in sealing state, can carry out suppressing work.Dissolubility part is can be by the metal derby of acid leach solution
Or nonmetal block material, such as unit of plastic, block rubber etc., after dissolubility part dissolves, carry out injection work, medicament passes through instrument
In inwall 20 or several circular hole entering tool ring cavities, when pressure reaches 0.5MPa, medicament promotes mobile piston movement, compression
Spring, sealing drum is connected with mobile piston, and mobile piston driving sealing drum opens chemical agent injection valve.After injection terminates,
Instrument inside and outside pressure reduction is zero, and recoil of spring promotes mobile piston return, chemical injection valve closure.
This structure utilizes internal tool pressure, controls and opens, and using recoil of spring, controls closing to reach synchronous unlatching or close
Close function.
With respect to prior art, chemical agent injection valve of the present invention has the advantage that：
Chemical agent injection valve of the present invention is requisite key tool in AICD water control pipe post technique, this
Instrument energy time-limited locking, unidirectional injection, synchronous be turned on and off, long-term storage.
Brief description
The accompanying drawing constituting the part of the present invention is used for providing a further understanding of the present invention, the schematic reality of the present invention
Apply example and its illustrate, for explaining the present invention, not constituting inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the injection valve partial schematic diagram described in the embodiment of the present invention；
Fig. 2 is generalized section at the A of embodiment of the present invention Fig. 1；
Fig. 3 is generalized section at the B of embodiment of the present invention Fig. 1；
Fig. 4 is the overall schematic of the injection valve described in the embodiment of the present invention；
Fig. 5 is the tool tubular column artwork described in the embodiment of the present invention；
Fig. 6 is traffic organising schematic diagram in the layer of embodiment of the present invention Fig. 5 local.
Description of reference numerals：
1- first variable buckle；2- injection valve body；Block under 3-；4- injection valve sealing drum；5- injection valve protection set；6- dissolves
Block；7- fixed block；8- attachment screw；9- injection valve moves piston；10- spring；11- spring rotary slider；12- spring pre-tightening keeps off
Block；The upper block of 13-；14- second variable buckle；15- jackscrew；16- sealed packing；17- first O-ring；18- second O-ring；19-
Three O-ring；20- support ring；21- dust ring；A- tubing hanger；B- oil pipe；C- sleeve pipe；D- top packer；E-AICD valve；F- every
From packer；G- screen casing；H- oil field water and oil control technological measure operation medicament implantation tool.
Specific embodiment
It should be noted that in the case of not conflicting, the embodiment in the present invention and the feature in embodiment can phases
Mutually combine.
In describing the invention it is to be understood that term " " center ", " longitudinal ", " horizontal ", " on ", D score,
The orientation of instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward " or position relationship are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that right
The restriction of the present invention.Additionally, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicating or hint phase
To importance or the implicit quantity indicating indicated technical characteristic.Thus, the feature defining " first ", " second " etc. can
To express or to implicitly include one or more this feature.In describing the invention, unless otherwise stated, " multiple "
It is meant that two or more.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or is integrally connected；Can
To be to be mechanically connected or electrical connection；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
To describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As shown in figs. 1 and 4, level pressure injection valve opened in limited time by a kind of water and oil control medicament, including the first variable buckle 1, injection valve
Body 2, lower block 3, injection valve sealing drum 4, dissolving block 6, fixed block 7, injection valve move piston 9, spring 10, spring rotation cunning
Block 11, spring pre-tightening block 12, upper block 13 and the second variable buckle 14, described first variable buckle 1 and the second variable buckle 14 are arranged on injection
The two ends of valve body 2, for connecting main pipeline two ends, described injection valve body 2 is cavity tubular construction, and is arranged with outward tubular knot
The injection valve sealing drum 4 of structure, one end of injection valve sealing drum 4 is provided with lower block 3, and described lower block 3 is set in injection valve body 2
Combine closely above and with injection valve body 2 outer surface, between lower block 3 and injection valve sealing drum 4, be additionally provided with sealed packing 16；Under
Block 3 and upper block 13 are connected on injection valve body 2 by jackscrew 15；As shown in Fig. 2 described injection valve sealing drum 4 and note
Gap is left, for the injection of chemical agent between medicine valve body 2；As shown in figure 3, being sheathed in injection valve sealing drum 4
Injection valve body 2 is provided with four uniform dissolving blocks 6 of five circular rows be arrangeding in parallel, and described dissolving block 6 passes through fixed block 7 ring
Row are fixed on the side wall of injection valve body 2, and dissolving block 6 is connected with injection valve body 2 internal cavity, and described dissolving block 6 completely fills
In fixed block 7, fixed block 7 seals to dissolving block 6 and injection valve body 2；As shown in figs. 1 and 4, injection valve sealing drum 4
The other end be connected with injection valve and move piston 9, the mobile piston 9 of injection valve is connected by attachment screw 8 with injection valve sealing drum 4
Fixing, the other end of the mobile piston 9 of injection valve is abutted against with spring 10 one end, and the other end of described spring 10 is slided with spring rotation
Block 11 abuts against, and the outer end of spring rotary slider 11 is abutted with spring pre-tightening block 12, and spring pre-tightening block 12 is held out against with screw
Mode is fixed on the outer wall of injection valve body 2, and spring pre-tightening block 12 plays the effect of pretension so that spring 10 to spring 10
Reach pretightning force, be easy to adjust, described upper block 13 is sheathed on the outer end of spring pre-tightening block 12, limited spring pretension keeps off
The abjection of block 12；
Further, it is additionally provided with injection valve protection set 5 outside described injection valve sealing drum 4, protect internal structure, and injection valve
The position with respect to sealed rubber ring 4 closely descending block 3 end of protective case 5 has protective case slotted eye, for the outflow of chemical agent；
Further, be provided with the first O-ring 17 between described fixed block 7 and injection valve body 2, the mobile piston 9 of injection valve with
It is provided with the second O-ring 18 between injection valve body 2, between the mobile piston 9 of injection valve and injection valve sealing drum 4, be provided with the 3rd O-ring 19,
Described first O-ring 17, the second O-ring 18, the 3rd O-ring 19 play the effect of sealing；
Further, it is additionally provided with support ring 20, for supporting between the mobile piston 9 of described injection valve and injection valve body 2
Injection valve moves slip on injection valve body 2 for the piston 9, in the injection valve of the mobile piston 9 of injection valve and spring 10 junction
Body 2 be provided with dust ring 21, described dust ring 21 can effectively prevent dust from blocking the port of the mobile piston 9 of injection valve.
The water and oil control technological measure operation of the present invention assembly program of medicament implantation tool：
S1, the first variable buckle 1 connect portion's flow string, and the second variable buckle 15 connects bottom flow string；
S2, the pipe connecting seal in well, will enter oil sealing under the water and oil control technological measure operation medicament implantation tool of oil field
It is layered corresponding position every device；
S3, set the downhole tools such as cable-passing packer, now, water and oil control technological measure operation medicament implantation tool
Be close so that maintain tubing string in set pressure；
S4, setting finish after, recover oil well production, water and oil control dissolving in medicament implantation tool for the technological measure operation
Ball starts to be dissolved to schedule, and when needs carry out being acidified etc. measure operation, water and oil control technological measure operation is used
Medicament implantation tool is fully open it is ensured that oil pipe passes through screen casing injects medicament to stratum.
In conjunction with shown in Fig. 5, the flow string artwork of water and oil control technological measure operation supporting medicament implantation tool, including
Sleeve pipe c, tubing hanger a, packer d and screen casing g, these components constitute horizontal well oil field water and oil control technique and measure integration
Flow string；Described oil pipe b upper end and tubing hanger a pass through screwed connection, and tubing hanger a realizes envelope with sleeve pipe c by seal modules；
AICD valve e by screwed connection and medicament implantation tool h of the present invention is provided with oil pipe b, AICD valve is check valve, liquid is only
Jacket exterior can be bribed from this valve stream of oil pipe b interior flow diameter, on the contrary then can not, jacket exterior is stratum；Top packer d, every
It is fixed on sleeve pipe c from packer f, oil pipe b is provided with and coordinates to realize sealing with top packer d, isolation packer f
Sealed mould module, sleeve pipe c and oil pipe b passes through top packer d, the isolation packer f and tubing hanger a annular space oil pipe and sleeve pipe
It is divided into four layers, between isolation packer f, is layered as level course position, and centre is connected with and can allow the screen casing of fluid flow paths
g；
Traffic organising is as shown in fig. 6, during oil well production, in-place oil enters oil pipe by AICD valve and rises to ground, arranges
When applying industry, AICD valve is obstructed, and medicament enters stratum, measure operation by water and oil control technological measure operation with medicament implantation tool
Afterwards, resume production, water and oil control technological measure operation is closed with medicament implantation tool, in-place oil thus can not flow into oil pipe,
Oil pipe can only be flowed into by AICD valve, realize water and oil control and produce.
The assembly program of described medicament implantation tool：First O-ring 17 is arranged on the relevant position of injection valve body 2,
Again dissolving block 6 will be installed, compress dissolving block 6 with fixed block 7 so as to seal；Second O-ring 18, the 3rd O-ring 19 are arranged on
On the relevant position of the mobile piston 9 of injection valve, then it is inserted in mounted injection valve movement piston 9 from right-hand member；With attachment screw 8 even
Connect injection valve sealing drum 4 and move piston 9 with injection valve；Lower block 3 is screwed in from left end and tightens, and fixing with jackscrew 15, from a left side
Spring 10 is inserted at end, then is inserted in spring rotary slider 11；Screw in spring pre-tightening block 12 and arrive specified location, make spring 10 pretension simultaneously
Fixing with jackscrew 15；It is inserted in injection valve protection set 5 from right-hand member, then screws in block 13 and tighten, and fixing with jackscrew 15；In left end
The first variable buckle 1 is installed at place；In right-hand member, the second variable buckle 14 is installed.
Described chemical agent injection valve operation principle：Described injection valve is passed through the first variable buckle 1, the second variable buckle 13 loading refers to
Positioning is put, and dissolving block 6 is in not yet dissolved state, is in sealing state, injection valve body 2 inner chamber and injection valve with fixed block 7
The gap of sealing drum 4 and injection valve body 2 is not connected, can carry out annular space and suppress with inside, within the time setting, dissolves block
6 dissolvings, inject chemical agent, and chemical agent enters injection valve sealing drum 4 with injection valve originally from the dissolving block 6 place hole dissolving
In ring cavity between body 2, and then injection valve is promoted to move piston 9, the mobile piston 9 of injection valve passes through to be connected with injection valve sealing drum 4
Screw 8 connects, and spring 10 is compressed, drives injection valve sealing drum 4 upstop 13 direction to move, injection valve sealing drum 4 with
Block 3 separates, thus flowing out, the chemical agent of outflow flows out chemical agent again through the protective case slotted eye of injection valve protection set 5；
After chemical agent injection finishes, the pressure balance of ring cavity inside and outside, spring 10 promotes the mobile work of injection valve in the presence of pretightning force
Plug 9 and injection valve sealing drum 4 reset, and outside liquid cannot be introduced in injection valve body 2 inner chamber.
Described chemical agent injection valve have time-limited locking, unidirectional injection, synchronous be turned on and off, long-term storage etc. many
Weight function.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (7)
1. water and oil control medicament open level pressure injection valve in limited time it is characterised in that：Including injection valve body (2), lower block (3),
Injection valve sealing drum (4), injection valve protection set (5), dissolving block (6), fixed block (7), the mobile piston (9) of injection valve, spring
And spring pre-tightening block (12) (10)；
Described injection valve body (2) is cavity tubular construction, and is arranged with outward injection valve sealing drum (4) of tubular structure, injection valve
One end of sealing drum (4) is provided with lower block (3), is additionally provided with sealed packing between lower block (3) and note injection valve sealing drum (4)
(16), leave gap between described injection valve sealing drum (4) and injection valve body (2)；Described injection valve sealing drum (4) also sets outward
Have injection valve protection set (5), and injection valve protection set (5) closely descend the position with respect to sealed packing (16) that block (3) holds
Have protective case slotted eye；
The uniform dissolving block (6) of several circular rows is provided with the injection valve body (2) being sheathed in injection valve sealing drum (4),
Described dissolving block (6) is sealingly fastened on the side wall of injection valve body (2) by fixed block (7) circular row, and dissolves block (6) and note
Medicine valve body (2) internal cavity connects；
The other end of injection valve sealing drum (4) is connected with the mobile piston (9) of injection valve, the mobile piston (9) of injection valve and injection valve
Sealing drum (4) is connected by attachment screw (8), and the other end of the mobile piston (9) of injection valve is offseted with spring (10) one end
Connect；
Described spring (10) other end is provided with spring pre-tightening block (12), and spring pre-tightening block (12) is in the way of jackscrew is fixing
It is fixed on the outer wall of injection valve body (2).
2. water and oil control medicament according to claim 1 open level pressure injection valve in limited time it is characterised in that：Described spring
(10) it is additionally provided with spring rotary slider (11), spring (10) and spring rotary slider (11) phase and spring pre-tightening block (12) between
Abut, spring pre-tightening block (12) is abutted with spring rotary slider (11).
3. water and oil control medicament according to claim 1 open level pressure injection valve in limited time it is characterised in that：Described spring is pre-
Tight block (12) outer end is additionally provided with block (13), and upper block (13) is sheathed on injection valve body (2), and injection valve protection set
(5) two ends are connected with upper block (13) and lower block (3) respectively.
4. water and oil control medicament according to claim 1 open level pressure injection valve in limited time it is characterised in that：Described fixed block
(7) it is provided with the first O-ring (17) and between injection valve body (2), be provided between the mobile piston (9) of injection valve and injection valve body (2)
Second O-ring (18), is provided with the 3rd O-ring (19) between the mobile piston (10) of injection valve and injection valve sealing drum (4).
5. water and oil control medicament according to claim 1 open level pressure injection valve in limited time it is characterised in that：Several circular rows
Uniform dissolving block (6) in injection valve sealing drum (4) relative to injection valve body (2) upper be in the setting of several parallel groups.
6. water and oil control medicament according to claim 1 open level pressure injection valve in limited time it is characterised in that：Described injection valve
It is additionally provided with support ring (20), in the mobile piston (9) of injection valve and spring (10) between mobile piston (9) and injection valve body (2)
The injection valve body (2) of junction be provided with dust ring (21).
7. water and oil control medicament according to claim 1 open level pressure injection valve in limited time it is characterised in that：Dissolving block (6)
For can be by the metal derby of acid leach solution or unit of plastic or block rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610980654.4A CN106437616A (en) | 2016-11-08 | 2016-11-08 | Reagent injection tool for oil field water control and oil stabilizing process measure operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610980654.4A CN106437616A (en) | 2016-11-08 | 2016-11-08 | Reagent injection tool for oil field water control and oil stabilizing process measure operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106437616A true CN106437616A (en) | 2017-02-22 |
Family
ID=58207799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610980654.4A Pending CN106437616A (en) | 2016-11-08 | 2016-11-08 | Reagent injection tool for oil field water control and oil stabilizing process measure operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106437616A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108979581A (en) * | 2017-06-05 | 2018-12-11 | 中国石油化工股份有限公司 | A kind of deep-well accurate quantification injecting water plugging string system |
| CN114320244A (en) * | 2022-01-04 | 2022-04-12 | 西南石油大学 | Bidirectional different-channel gravel resistance-reducing filling and water-blocking acidizing tool |
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| US4595060A (en) * | 1984-11-28 | 1986-06-17 | Halliburton Company | Downhole tool with compressible well fluid chamber |
| CN101705812A (en) * | 2009-11-17 | 2010-05-12 | 中国海洋石油总公司 | Large-discharge single pipe layered polymer injection and injection allocation method and device |
| CN203394480U (en) * | 2013-06-18 | 2014-01-15 | 中国石油天然气股份有限公司 | Layered acidification device for oil-water well |
| CN104314520A (en) * | 2014-08-25 | 2015-01-28 | 西南石油大学 | Sliding sleeve type subsurface safety valve |
| CN104963700A (en) * | 2015-06-30 | 2015-10-07 | 中国矿业大学 | Soft rock roadway surrounding rock high pressure gas active presplitting grouting device and method |
| CN206329310U (en) * | 2016-11-08 | 2017-07-14 | 中海油能源发展股份有限公司 | Oil field water and oil control technological measure operation medicament implantation tool |
-
2016
- 2016-11-08 CN CN201610980654.4A patent/CN106437616A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4595060A (en) * | 1984-11-28 | 1986-06-17 | Halliburton Company | Downhole tool with compressible well fluid chamber |
| CN101705812A (en) * | 2009-11-17 | 2010-05-12 | 中国海洋石油总公司 | Large-discharge single pipe layered polymer injection and injection allocation method and device |
| CN203394480U (en) * | 2013-06-18 | 2014-01-15 | 中国石油天然气股份有限公司 | Layered acidification device for oil-water well |
| CN104314520A (en) * | 2014-08-25 | 2015-01-28 | 西南石油大学 | Sliding sleeve type subsurface safety valve |
| CN104963700A (en) * | 2015-06-30 | 2015-10-07 | 中国矿业大学 | Soft rock roadway surrounding rock high pressure gas active presplitting grouting device and method |
| CN206329310U (en) * | 2016-11-08 | 2017-07-14 | 中海油能源发展股份有限公司 | Oil field water and oil control technological measure operation medicament implantation tool |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108979581A (en) * | 2017-06-05 | 2018-12-11 | 中国石油化工股份有限公司 | A kind of deep-well accurate quantification injecting water plugging string system |
| CN114320244A (en) * | 2022-01-04 | 2022-04-12 | 西南石油大学 | Bidirectional different-channel gravel resistance-reducing filling and water-blocking acidizing tool |
| CN114320244B (en) * | 2022-01-04 | 2023-05-09 | 西南石油大学 | Bidirectional different-channel gravel drag reduction filling and water-blocking acidizing tool |
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