CN110159234A - Concentric double pipe dispenses CO2Tubing string and its application method - Google Patents
Concentric double pipe dispenses CO2Tubing string and its application method Download PDFInfo
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- CN110159234A CN110159234A CN201910536398.3A CN201910536398A CN110159234A CN 110159234 A CN110159234 A CN 110159234A CN 201910536398 A CN201910536398 A CN 201910536398A CN 110159234 A CN110159234 A CN 110159234A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000007246 mechanism Effects 0.000 claims abstract description 103
- 238000007789 sealing Methods 0.000 claims abstract description 77
- 238000002347 injection Methods 0.000 claims abstract description 36
- 239000007924 injection Substances 0.000 claims abstract description 36
- 238000003780 insertion Methods 0.000 claims abstract description 26
- 230000037431 insertion Effects 0.000 claims abstract description 26
- 210000000078 claw Anatomy 0.000 claims description 20
- 238000005260 corrosion Methods 0.000 claims description 15
- 230000007797 corrosion Effects 0.000 claims description 13
- 238000004880 explosion Methods 0.000 claims description 11
- 239000003112 inhibitor Substances 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 8
- 210000002445 nipple Anatomy 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000010009 beating Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 abstract description 5
- 238000011161 development Methods 0.000 abstract description 4
- 238000004873 anchoring Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 19
- 238000011010 flushing procedure Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 8
- 239000010410 layer Substances 0.000 description 6
- 239000011229 interlayer Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002627 tracheal intubation Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000002198 insoluble material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
-
- 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
- E21B43/164—Injecting CO2 or carbonated water
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
The present invention relates to oil field development air insufflation techiques fields, are applied to CO2Dispensing.Casing, outer tube and inner tube of the present invention are sequentially nested, and outer door, upper packer, gas-separating valve, lower packet and gas injection valve are sequentially connected on outer tube；Inner tube lower end first connects inner door, then is connected with gas-separating valve；Insertion sealing mechanism, retaining mechanism and Fang Fantu mechanism are equipped in the gas-separating valve.Its application method is lower outer pipe column；Set packer；Lower inner tube insertion is sealed and is locked；Gas injection；Open inner door kill-job；Play inner tube；Open outer door kill-job；Deblocking packer plays outer tubing string.The present invention has interior outer door, solves kill-job access issues；With Fang Fantu mechanism, production safety；With insertion seal-locking mechanism, seal failure is prevented.Used with anchoring but without the airtight sealed packer in washing well channel, ensure that reliable separation, it is therefore prevented that lower pressure difference is excessive move up packer caused by seal failure problem.
Description
Technical field
The present invention relates to petroleum industry oil field development layered gas-injection technical field, especially concentric double pipes to dispense CO2Tubing string
And its application method.
Background technique
In oilfield development process, water filling is the main method of stratum supplement energy.In order to solve different oil reservoirs because of layer
Between and plane on water absorbing capacity difference, reasonably adjust the water injection rate of different oil reservoirs, be widely implemented in development technology in oilfield
Separate zone waterflooding technology.
In separate zone waterflooding technology, concentric double pipe dispensing is a common technology, such as Chinese Patent Application No.
201020165475.3, the applying date on 04 16th, 2010, patent name " high angle hole ground water distribution concentric double pipe dispensing pipe
Column ".This technology is mainly characterized by two layers of oil pipe being nested with one heart of underground installation, the installation layering washing well in outer oil pipe
Packer, be arranged near layer separating packer one seal in outer oil pipe annular space insertion apparatus, realize in outer oil pipe annular space to
Upper oil-bearing stratum flooding, the downward oil-bearing stratum flooding of inner oil tube.The well killing fluid of well-flushing or killing job is pumped by oil jacket annulus, and flowing through can
Flushing packer returns out from oil pipe.
Concentric double pipe dispensing technology has been also applied to CO now2It drives on dispensing well.Chinese Patent Application No.
200920100747.9 the applying date on 08 28th, 2009, patent name " CO2Drive concentric double pipe zone separate injection technical string ", this
Patent discloses a kind of technology similar to above-mentioned patent.It describes in the art, outer oil pipe is placed in casing, outer oil pipe and interior
Oil pipe forms binary channels, and lower end is sequentially connected outer insertion seal section, packer, sliding sleeve, interior insertion seal section and packer, and
And it is connected by inner oil tube between packer, sliding sleeve and interior insertion seal section.It is not both to have used two-stage Y443 that its is maximum
Well packer capable of flushing well, two-stage packer tripping in two times when complete well.When site operation, oil pipe carries junior's packer to pre-determined bit
It sets, oil pipe suppresses completion and sets, gives up, and plays tripping in higher level packer again after flowline, and oil pipe is suppressed after completion sets, gives up,
Tripping in is by outer oil pipe and the outer outer tube that forms of insertion seal section, in last tripping in is made of inner oil tube and interior insertion seal section
Pipe.Inner and outer pipes annular injection upper layer, inner tube pour down layer.It when need to carry out cycle operation, is suppressed from casing, sliding sleeve can be connected to oil jacket sky
Between, realize reacting cycle operation.
Existing concentric double pipe dispensing technology is in CO2It dispenses on well using there are following technological deficiencies:
1. packer all has washing well mechanism, the poor reliability in underground, once failure, will result in interlayer and gangs up or annular space
Production with pressure brings adverse effect to layered gas-injection effect and production safety, using can not flushing packer instead of washing well seal
It but can not well-flushing every device.
2. the tool of spitting is returned without anti-in underground, when accidental release occurs for the facilities such as ground gas injection well mouth, process, oil reservoir is injected
CO2Well head will be sprayed, safety accident is likely to result in.
3. thrust of the sealing insertion apparatus under certain interlayer pressure difference by lower section reaches certain value, it can push up
Insertion portion and inner oil tube, cause seal failure.
4. not accounting for being replaced in the oil jacket annulus more than upper packer into corrosion inhibitor solution and protecting upper sleeve, prevent
CO2Corrosion.
Summary of the invention
In order to solve the above technical problems, having invented concentric double pipe dispensing CO2Tubing string and its application method solve existing skill
Packer, which is reliably sealed, in art prevents injection CO with the contradiction of well-flushing, underground2Return spit it is close with the contradiction of well-flushing, double layer oil pipe annular space
Envelope integrity problem and oil jacket annulus corrosion inhibitor solution are replaced into problem.
To achieve the above object, the present invention adopts the following technical scheme:
Concentric double pipe dispenses CO2Tubing string, casing, outer tube and inner tube are sequentially nested coaxial installation, are sequentially connected with packing on outer tube
Device and lower packet, are separately connected outer door and gas-separating valve in upper packer on outer tube above and below, connect below lower packet
Gas injection valve；Inner tube lower end is connected with gas-separating valve, and inner door is arranged in the inner tube more than gas-separating valve；It is equipped in the gas-separating valve
It is inserted into sealing mechanism, retaining mechanism and Fang Fantu mechanism.
The gas-separating valve is provided with side runner and center flow channels；Radially, side is formed between shell and sealed outer pipe
Runner；Sealing interpolation pipe and sealed outer pipe axial core collectively form center flow channels；Seal interpolation pipe and sealed outer pipe and its ring
Sealing element in sky is co-axially mounted to form insertion sealing mechanism；Sealing interpolation pipe top is connected with inner tube；It is set in center flow channels
Retaining mechanism is set to be connected with sealing interpolation pipe and sealed outer pipe respectively；Retaining mechanism can be located at sealing element above and below, anti-to return
It spits mechanism from-inner-to-outer and links up side runner and oil jacket annulus.
The retaining mechanism by locking head and claw being divided to constitute, divide claw and locking head respectively with sealed outer pipe and sealing
Interpolation pipe is connected；Claw end is divided to be equipped with internal conical surface, correspondingly, locking cephalic par is equipped with outer conical surface, in locking head and divides
Mutually matched locking shoulder is equipped between claw, the bus and axis angle of the locking shoulder are 80 °~100 °.
Can also be achieved: the retaining mechanism with sealed outer pipe and sealing interpolation pipe by being connected respectively with convex
It plays mutually nested housing and inner cylinder to constitute, has radially-inwardly raised inner convex platform in housing, inner convex platform has interior shoulder；Inner cylinder is set
There is the outer lug boss of radially outwardly projecting, outer lug boss is equipped with outer shoulder and confined planes.
Can also be achieved: the retaining mechanism is paid by taper facing and intermeshing locking screw and is constituted.Institute
The taper facing stated is provided with the outer cone facing of internal screw thread, and mutually matched circle is equipped between outer cone facing and sealed outer pipe
The conical surface, circular conical surface radial direction top and the bottom are diameter big ends, and the internal screw thread of external screw thread and outer cone facing is equipped on sealing interpolation pipe
Locking screw is collectively formed to pay.Can also be achieved: the taper facing is provided with externally threaded female cone facing, inner circle
It bores and is equipped with mutually matched circular conical surface between facing and sealing interpolation pipe, circular conical surface radial direction top and the bottom are diameter big ends, are being sealed
Outer tube is equipped with internal screw thread and the external screw thread of female cone facing collectively forms locking screw pair.
Can also be achieved: the retaining mechanism is equipped with safe mechanism of slipping out of the hand.
In lower setting mechanism is arranged on outer tube between the gas injection valve and lower packet, gas-separating valve and upper packer it
Between or upper setting mechanism is set inside gas-separating valve.The lower setting mechanism includes valve ball and valve seat.Machine is set under described
Shear pin is provided between structure and outer tube.The upper setting mechanism is a kind of explosion diaphragm structure, including explosion diaphragm, rupture disk
Piece is mounted on the annular space between outer tube and inner tube Nei or in the side runner of gas-separating valve.It can also be achieved: be set on described
Mechanism includes ring piston and shear pin, and ring piston is set between the annular space or sealed outer pipe and shell between outer tube and inner tube
Annular space in, the position of the fixed ring piston of setting shear pin in the axial direction.It can also be achieved: the upper setting mechanism packet
The sliding sleeve for being arranged in and being used for sealed sides discharge orifice in sealed outer pipe is included, sliding set shoulder is set on sealing interpolation pipe.
The Fang Fantu mechanism is the ball-and-seat being made of valve ball one and valve seat one, and ball-and-seat is mounted on shell
In the vertical hole of side wall, the lower end of ball-and-seat is communicated with side runner and upper end is communicated with oil jacket annulus.It can also be achieved: described
Fang Fantu mechanism include bridge-type pipe nipple, valve ball two, spring and silk plug；Bridge-type pipe nipple axis sets up three counterbores, left counterbore
It is a part of side runner；Right counterbore links up center flow channels up and down；Center counterbore upper end is connected to left counterbore, the counterbore at center
Middle part sets inner conical valve seat and valve ball two-phase cooperatively forms ball-and-seat, and two lower part of valve ball sets holddown spring and silk plug, in valve ball
Position setting radial hole links up center counterbore and oil jacket annulus between two and silk plug.
The upper packer and lower packet all has anchor mechanism.
It is put in the inner door equipped with inner conical ball seat or concave-convex switch slot.
It puts in the outer door equipped with inner conical ball seat.Alternatively, the interior of the outer door is put on equipped with recessed
Convex switch slot.Tongue and groove switch is connected in the inner tube in outer side door or its following position.
Concentric double pipe dispenses CO2The application method of tubing string, complete well, gas injection step be,
A, gas injection valve, lower packet, gas-separating valve, upper packer and outer door and tripping in set lower outer pipe: are sequentially connected using oil pipe
In pipe, wherein upper packer is located at the above position of upper oil reservoir and lower packet is placed between oil reservoir and lower oil reservoir, point
The sealing interpolation pipe of air valve is not gone into the well with outer tube；
B, it replaces into corrosion inhibiter: replacing from oil jacket annulus reacting cycle into corrosion inhibitor solution；
C, upper packer and lower packet set packer: are set by the mode for beating hydraulic in oil pipe；
D, it lower inner tube: is sequentially connected in the sealing interpolation pipe and inner door and tripping in outer tube of gas-separating valve, is made in sealing using inner tube
Intubation reaches at gas-separating valve and locks retaining mechanism；
E, gas injection: the gas of oil reservoir is injected from outer tube and the annular space of inner tube on note, and the gas for pouring down oil reservoir is injected from inner tube；
It plays out job step,
F, first step kill-job: the switching tools that inner door is opened in tripping in into inner tube open inner door, link up inner tube and inner and outer pipes
Between annular space, using just wash or backwash by the way of kill-job；
G, it plays inner tube: above proposing inner tube, act inner door and sealing interpolation pipe；
H, second step kill-job: the switching tools that outer door is opened in tripping in into outer tube open outer door, link up outer tube and oil jacket ring
Sky, using just wash or backwash by the way of kill-job；
I, it plays outer tube: above mentioning deblocking packer, play flowline and all downhole tools.
Concentric double pipe dispenses CO2The application method of tubing string can also be achieved: its complete well, gas injection step be,
A, gas injection valve, lower packet, gas-separating valve, upper packer and outer door and tripping in set lower outer pipe: are sequentially connected using oil pipe
In pipe, wherein upper packer is located at the above position of upper oil reservoir and lower packet is placed between oil reservoir and lower oil reservoir, point
The sealing interpolation pipe of air valve is not gone into the well with outer tube；
B, it replaces into corrosion inhibiter: replacing from oil jacket annulus reacting cycle into corrosion inhibitor solution；
C, upper packer and lower packet set packer: are set by the mode for beating hydraulic in oil pipe；
D, sealing interpolation pipe, tongue and groove switch and the inner door and tripping in outer tube of gas-separating valve lower inner tube: are sequentially connected using inner tube
It is interior, make to seal at interpolation pipe arrival gas-separating valve and locks retaining mechanism；
E, gas injection: the gas of oil reservoir is injected from outer tube and the annular space of inner tube on note, and the gas for pouring down oil reservoir is injected from inner tube；
It plays out job step,
F, first step kill-job: the switching tools that inner door is opened in tripping in into inner tube open inner door, link up inner tube and inner and outer pipes
Between annular space, using just wash or backwash by the way of kill-job；
G, it plays inner tube: above proposing inner tube, act inner door, tongue and groove switch and sealing interpolation pipe；Tongue and groove switch proposes process upper
Middle opening outer door links up outer tube and oil jacket annulus；
H, second step kill-job: oil jacket annulus using just wash or backwash by way of kill-job；
I, it plays outer tube: above mentioning deblocking packer, play flowline and all downhole tools.
Technological merit of the invention is:
1, using two sets of anchoring packers without well-flushing passage, by outer door in being arranged, two-step method kill-job is used in technique,
Solve kill-job access issues.
2, it is respectively provided with Fang Fantu mechanism on underground gas-separating valve and gas injection valve, when ground gas injection well mouth, process etc. are set
When applying generation accidental release, the CO of injection oil reservoir can be prevented2Well head is sprayed, the generation of safety accident is avoided.
3, underground be provided with inner tube be inserted into seal-locking mechanism, sealing insertion apparatus under certain interlayer pressure difference by
When the thrust of lower section reaches certain value, prevent from pushing up sealing interpolation pipe and causing seal failure.
4, it has used with anchoring but without the airtight sealed packer in washing well channel, there are two the effects of aspect, first is that
The poorly sealed problem of the flushing valve of packer is relieved, both ensure that zonal isolation sealing reliability, also ensures oil jacket ring
Empty reliable sealing, replaces for oil jacket annulus and provides condition into corrosion inhibitor solution anti-corrosion；Second is that preventing pressure difference under interlayer excessive
Seal failure problem caused by moving up packer.
Detailed description of the invention
When considered in conjunction with the accompanying drawings, by referring to following detailed description, the present invention can be more completely and better understood with
And be easy to learn many adjoint advantages, but the drawings described herein are used to provide a further understanding of the present invention,
A part of the invention is constituted, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, does not constitute to this hair
Bright improper restriction, in which:
Fig. 1 is concentric double pipe dispensing CO2Tubular column structure schematic diagram.
Fig. 2 is the enlarged drawing in the portion A in Fig. 1, and main presentation is inserted into sealing mechanism.
Fig. 3 is one structural schematic diagram of preferred embodiment of sealing insertion retaining mechanism.
Fig. 4 is two structural schematic diagram of preferred embodiment of sealing insertion retaining mechanism.
Fig. 5 is the jacket structure schematic diagram of the preferred embodiment three of sealing insertion retaining mechanism.
Fig. 6 is the inner tube structure schematic diagram of the preferred embodiment three of sealing insertion retaining mechanism.
Fig. 7 is the inside and outside male cooperation schematic diagram of the preferred embodiment three of sealing insertion retaining mechanism.Shown plan view is
The appearance expanded view of cylindrical body where the half of inside and outside height of projection.
Fig. 8 is the structural schematic diagram of the preferred embodiment four of sealing insertion retaining mechanism.
Fig. 9 is the structural schematic diagram of the preferred embodiment five of sealing insertion retaining mechanism.
Figure 10 is concentric double pipe dispensing CO2The structural schematic diagram of tubing string setting mechanism.
Figure 11 is the structural schematic diagram of explosion diaphragm type setting mechanism.
Figure 12 is the structural schematic diagram of sleeve piston type setting mechanism.
Figure 13 is the structural schematic diagram of sleeve type setting mechanism, and sliding sleeve is in close state in figure.
Figure 14 is the structural schematic diagram of sleeve type setting mechanism, and sliding sleeve is in the open state in figure.
Figure 15 is one structural schematic diagram of preferred embodiment of Fang Fantu mechanism.
Figure 16 is two structural schematic diagram of preferred embodiment of Fang Fantu mechanism.
Figure 17 is the structural schematic diagram of inner door, the preferred embodiment of outer door one.
Figure 18 is the structural schematic diagram of inner door, the preferred embodiment of outer door two.
Figure 19 is the tubular column structure schematic diagram of outer door unfolding mode preferred embodiment.
Specific embodiment
"upper" described in terms of positional relationship, "lower", "left", "right" in the specification and claims are to read
The positional relationship that person is seen at visual angle, page top be it is upper, under page bottom is, reader's left hand be a left side, reader's right hand be the right side.?
When describing that pipe is inside and outside or innner and outer relationship, with the small place of radially radius be in or in, be outer with radius general goal.As described below
" oil jacket annulus " is the annular space between finger sleeve and outer tube.There is sealing place by diagram in the drawings, in following explanation
In no longer repeat one by one.
It sees figure 1 and figure 2, concentric double pipe of the invention dispenses CO2Tubing string, casing 1, outer tube 2 and inner tube 3 are sequentially nested
Coaxial installation is sequentially connected with upper packer 6 and lower packet 9 on outer tube 2, connects respectively above and below on outer tube 2 in upper packer 6
Outer door 5 and gas-separating valve 7 are connect, connects gas injection valve 11 in 9 or less lower packet；3 lower end of inner tube is connected with gas-separating valve 7, is dividing gas
Inner door 4 is set in the inner tube 3 of 7 or more valve；It is equipped with insertion sealing mechanism 12, retaining mechanism 204 in the gas-separating valve 7 and prevents
Fan Tu mechanism 205.Upper packer is placed in 8 or more position of oil reservoir, and lower packet is placed between oil reservoir 8 and lower oil reservoir 10.
In order to reliably seal, the upper packer 6 and lower packet 9 are all without well-flushing passage；In order to prevent
Packer generates sliding when by larger pressure difference and influences sealing, and two packers have anchor mechanism, such as can make
With types such as Y441, Y445, Y443, RTTS.
The gas-separating valve 7 is provided with side runner 206 and center flow channels 207；Radially, shell 203 and sealed outer pipe
Side runner 206 is formed between 202；Sealing interpolation pipe 201 and 202 axial core of sealed outer pipe collectively form center flow channels 207；It is close
Sealing element 208 in envelope interpolation pipe 201 and sealed outer pipe 202 and its annular space is co-axially mounted to form insertion sealing mechanism 12；Sealing
201 top of interpolation pipe is connected with inner tube 3；In center flow channels 207 be arranged retaining mechanism 204 respectively with sealing interpolation pipe 201 and
Sealed outer pipe 202 is connected；Retaining mechanism 204 can be located at 208 above and below of sealing element, 205 from-inner-to-outer ditch of Fang Fantu mechanism
Logical side runner 206 and oil jacket annulus.
As shown in figure 3 and figure 4, one of described preferred embodiment of retaining mechanism 204 by locking head 303 and divides claw
305 are constituted, and claw 305 and locking head 303 is divided to be connected respectively with sealed outer pipe 202 and sealing interpolation pipe 201；Divide 305 end of claw
Portion is equipped with internal conical surface 301, and correspondingly, 303 end of locking head is equipped with outer conical surface 304, in locking head 303 and divides claw 305
Between be equipped with mutually matched locking shoulder 302.To disengage after preventing point claw and locking head from locking, the locking shoulder
302 bus is advisable with axis in 80 °~100 ° angles, is as shown in the figure 90 ° of angles.
It is described that claw 305 and locking head 303 is divided to be connected respectively with sealed outer pipe 202 and sealing interpolation pipe 201, refer to point
Claw 305 can be connected with sealed outer pipe 202, can also be connected with sealing interpolation pipe 201, locking head 303 can be outer with sealing
Pipe 202 is connected, and can also be connected with sealing interpolation pipe 201, as shown in Figure 3 and Figure 4.
Divide claw and locking head in order to facilitate disengagement, safe mechanism of slipping out of the hand can be set between, as shown in figure 4,
Locking head is set as two, is made of sleeve 403 and mandrel 402, both safe shear pin 401 is fixed, when above mentioning point claw, peace
Full shear pin 401 is cut, and sleeve 403 and claw is divided to separate together with mandrel 402.It can also be in locking head and sealed outer pipe 202
Between a weak link is set, thin axis 404 at one is set on mandrel as shown in the figure, breaking realization at thin axis when above mentioning
Retaining mechanism disengages.Certainly, for the disengagement of retaining mechanism, safety slip out of the hand mechanism can be set with divide claw and locking head
On relevant any position, structure is unlimited above two, and designing mechanism of slipping out of the hand is a kind of routine techniques.
As shown in Fig. 5, Fig. 6 and Fig. 7, the preferred embodiment of the retaining mechanism 204 two by respectively with sealed outer pipe
202 housings 503 and inner cylinder 601 mutually nested with protrusion being connected with sealing interpolation pipe 201 are constituted, and have diameter in housing 503
To inwardly protruded inner convex platform 502, inner convex platform 502 has interior shoulder 501；Inner cylinder 601 is equipped with the outer lug boss of radially outwardly projecting
604, outer lug boss 604 is equipped with outer shoulder 603 and confined planes 602.In the lower end insertion housing 503 of inner cylinder 601, inner cylinder and housing phase
To rotation, stick together the side of inner convex platform 502 with confined planes 602, tense inner cylinder 601 then up, make outer shoulder 603 with
Interior shoulder 501 forces together, and reaches lock state.Inner cylinder and housing can be disengaged using the method for opposite direction rotation to be locked,
It can be using release methods used by above-mentioned point of claw and locking head mechanism.
As shown in Figure 8, the three of the preferred embodiment of the retaining mechanism 204 are by taper facing and intermeshing locking
Screw thread, which is paid, to be constituted.The taper facing is provided with the outer cone facing 801 of internal screw thread, outer cone facing 801 and sealed outer pipe
Mutually matched circular conical surface is equipped between 202, radially its underpart is diameter big end to circular conical surface, is set on sealing interpolation pipe 201
There is the internal screw thread of external screw thread and outer cone facing 801 to collectively form locking screw and pays 802.It, can be outer circle for operating aspect
Cone facing 801 does ingredient petaloid, as shown in Figure 8, longitudinal grooved 803 is arranged, so that it is radially had elasticity, can radially open
It opens, sealing interpolation pipe 201, which is inserted directly into downwards outer cone facing 801, in this way makes screw thread pay engagement, then above mentions, by circular conical surface
It tightens outer cone facing 801 and realizes locking.Locking screw repayment can be as shown in figure 9, the taper facing be provided with outer spiral shell
The female cone facing 902 of line is equipped with mutually matched circular conical surface, circular conical surface between female cone facing 902 and sealing interpolation pipe 201
Radial top and the bottom are diameter big ends, and the external screw thread on sealed outer pipe 202 equipped with internal screw thread and female cone facing 902 collectively forms
Locking screw is paid, and female cone facing 902 also is provided with longitudinal grooved, and working principle is identical as Fig. 8.It is paid in order to facilitate locking screw
It disengages, safety is slipped out of the hand mechanism and aforementioned same design.The safety provided in Fig. 9 is slipped out of the hand another embodiment of mechanism: sealing
201 points of two pieces of interpolation pipe design, and nose cone 903 is fixed on sealing interpolation tube body by shear pin 901 and is collectively formed in sealing
Intubation 201.
The safety that the retaining mechanism 204 is equipped with mechanism of slipping out of the hand is not required, for example, locking screw, which is paid, to be passed through
Rotational disengagement, can also big load above propose inner tube and dial and take off a certain weak link.
As shown in Figure 10, setting in order to facilitate hydraulic setting packer, between the gas injection valve 11 and lower packet 9
It is set on lower setting mechanism 102 is set on outer tube 2, being arranged between gas-separating valve 7 and upper packer 6 or inside gas-separating valve 7
Mechanism 101.The lower setting mechanism 102 conventionally comprises valve ball 103 and valve seat 104.Solvable material can be used in valve ball 103
Material.If valve ball uses insoluble material, it should be provided with shear pin 105 between lower setting mechanism 102 and outer tube 2, traditionally shear pin
105 are arranged between valve seat and outer tube.Lower setting mechanism 102 can also be set as a tool with gas injection valve.
As shown in Figure 11, the upper setting mechanism 101 is a kind of explosion diaphragm structure, including explosion diaphragm 111, explosion
Diaphragm 111 is mounted on the annular space between outer tube 2 and inner tube 3 Nei or in the side runner 206 of gas-separating valve 7.Explosion diaphragm generally uses
Pressure cap 112 compresses.When underground liquid pressure reaches certain value, explosion diaphragm is crushed, and is connected to about 206 side runner.
As shown in Figure 12, the upper setting mechanism 101 can also be achieved, it includes ring piston 121 and shear pin
122, ring piston 121 is set to the annular space between the annular space between outer tube 2 and inner tube 3 or sealed outer pipe 202 and shell 203
In, that is, in side runner 206, the position of the fixed ring piston of setting shear pin 122 in the axial direction.When underground liquid pressure reaches one
When definite value, ring piston cuts shear pin downlink, is connected to about 206 side runner.
As shown in Figure 13, the upper setting mechanism 101 can also be achieved, it includes being arranged in sealed outer pipe 202
Sliding set shoulder 132 is arranged in the interior sliding sleeve 131 for sealed sides discharge orifice 133 on sealing interpolation pipe 201.It is shown in Figure 14
Sliding sleeve 131 is covered the state that effluent hole 133 is declined out under shoulder 132 by sliding.Interpolation pipe 201, shell 203 are sealed in figure.
As shown in Figure 15, the Fang Fantu mechanism 205 is the single stream being made of valve ball 1 and valve seat 1
Valve, ball-and-seat are mounted in the vertical hole of side wall of shell 203, and the lower end of ball-and-seat is communicated with side runner 206 and upper end and oil jacket
Annular space communicates.The CO of injection2Valve opening ball 1 is pushed up again into oil jacket annulus along 206 downlink of side runner.
As shown in Figure 16, the Fang Fantu mechanism 205 can also be achieved, it includes bridge-type pipe nipple 161, valve ball two
164, spring 165 and silk plug 168；Bridge-type pipe nipple axis sets up four counterbores, and left counterbore 163 is a part of side runner 206；
Right about 167 counterbore links up center flow channels 207；Counterbore 162 upper end in center is connected to left counterbore 163, the middle part of counterbore at center
If inner conical valve seat matches to form ball-and-seat with valve ball 2 164, two lower part of valve ball sets holddown spring 165 and silk plug 168,
Position setting radial hole 166 links up center counterbore and oil jacket annulus between valve ball two and silk plug.Upper center counterbore is as close in figure
Outer tube 202 is sealed, sealing interpolation pipe 201 is inserted.
The structure of inner door 4 and outer door 5 is with unfolding mode can be identical, is also possible to different.See Figure 17 institute
Show, inner door 4 and outer door 5 include outer cylinder 171 and inner sleeve 172, and outer cylinder sets radial wing passage, in the upper and lower in inner sleeve of wing passage
Upper setting sealing element 174.The inner sleeve 172 of the inner door 4 or outer door 5 is equipped with inner conical ball seat 173, when needs are beaten
When opening wing passage, to one ball of inner conical ball seat upslide, inner sleeve is pushed open by hydraulic coupling, opens its wing passage.It can be with
Be achieved: as shown in figure 18, the inner sleeve 172 of the inner door 4 or outer door 5 is equipped with concave-convex switch slot 182, works as needs
When opening wing passage, inner sleeve is pushed away under the tongue and groove switch 181 matched using one with concave-convex switch slot 182, concedes wing passage.
The shape of tongue and groove switch 181 is as shown in phantom in FIG., is only depicted in its shape in figure and switchs what slot 182 matched with concave-convex
Part.
As shown in Figure 19, it to simplify operation procedure, is connected in the inner tube 3 in outer side door 5 or its following position recessed
Tongue switch 181.In this way, it is upper propose inner tube when, the tongue and groove switch 181 connected in inner tube can direct handle during uplink
Outer door 5 is opened.
Concentric double pipe of the present invention dispenses CO2The application method of tubing string, since the structure of down-hole string is different, application method
It is different.In the case where not installing tongue and groove switch 181 in inner tube, complete well, gas injection step be,
A, gas injection valve 11, lower packet 9, gas-separating valve 7, upper packer 6 and outer door 5 lower outer pipe: are sequentially connected simultaneously using oil pipe
In tripping in casing, wherein upper packer 6 be located at upper 8 or more position of oil reservoir and lower packet 9 be placed in oil reservoir 8 and lower oil reservoir 10 it
Between, the sealing interpolation pipe 201 of the gas-separating valve 7 is not gone into the well with outer tube；
B, it replaces into corrosion inhibiter: replacing from oil jacket annulus reacting cycle into corrosion inhibitor solution；
C, upper packer and lower packet set packer: are set by the mode for beating hydraulic in oil pipe；
D, it lower inner tube: is sequentially connected in the sealing interpolation pipe 201 and inner door 4 and tripping in outer tube 2 of gas-separating valve 7, is made using inner tube
Sealing interpolation pipe 201 reaches at gas-separating valve and locks retaining mechanism 204；The lock mode of retaining mechanism with the difference of its structure and
Difference has plenty of direct insertion locking, has plenty of spin locking.
E, gas injection；The gas of oil reservoir is injected from outer tube and the annular space of inner tube on note, and the gas for pouring down oil reservoir is injected from inner tube；
It plays out job step,
F, first step kill-job: the switching tools that inner door 4 is opened in tripping in into inner tube 3 open inner door, link up inner tube and inside and outside
Annular space between pipe, using just wash or backwash by the way of kill-job；Open inner door 4 switching tools according to nested structure in it not
It is same and different.
G, it plays inner tube: above proposing inner tube, act inner door and sealing interpolation pipe；There is slipping out of the hand for a retaining mechanism when playing inner tube
Process slips out of the hand the difference of mechanism and different with safety, can be directly above to mention and slip out of the hand, be also possible to rotation and slip out of the hand.
H, second step kill-job: into outer tube 2 tripping in open outer door 5 switching tools open outer door, link up outer tube and
Oil jacket annulus, using just wash or backwash by the way of kill-job；Open outer door 5 switching tools according to the difference of nested structure in it and
It is different.
I, it plays outer tube: above mentioning deblocking packer, play flowline and all downhole tools.
Concentric double pipe dispenses CO2The application method of tubing string, in the case where being mounted with tongue and groove switch 181 in inner tube,
Its complete well, gas injection from rise do not have unlike job step and preceding method in h programs " into outer tube 2, tripping in is beaten
Over side door 5 switching tools ", it is other identical.
Obviously, those skilled in the art belong to guarantor of the invention based on many modifications and variations that spirit of the invention is done
Protect range.
Claims (23)
1. concentric double pipe dispenses CO2Tubing string, casing (1), outer tube (2) and inner tube (3) are sequentially nested coaxial installation, suitable on outer tube (2)
Secondary connection upper packer (6) and lower packet (9), which is characterized in that connect respectively above and below on outer tube (2) in upper packer (6)
Outer door (5) and gas-separating valve (7) are connect, connects gas injection valve (11) below in lower packet (9)；Inner tube (3) lower end and gas-separating valve (7)
It is connected, inner door (4) is set in the inner tube (3) more than gas-separating valve (7)；Insertion sealer is equipped in the gas-separating valve (7)
Structure (12), retaining mechanism (204) and Fang Fantu mechanism (205).
2. concentric double pipe according to claim 1 dispenses CO2Tubing string, which is characterized in that the gas-separating valve (7) is provided with
Side runner (206) and center flow channels (207)；Radially, side runner is formed between shell (203) and sealed outer pipe (202)
(206)；Sealing interpolation pipe (201) and sealed outer pipe (202) axial core collectively forms center flow channels (207)；Seal interpolation pipe
(201) sealing element (208) and in sealed outer pipe (202) and its annular space is co-axially mounted to form insertion sealing mechanism (12)；Sealing
Interpolation pipe (201) top is connected with inner tube (3)；In the center flow channels (207) setting retaining mechanism (204) respectively with sealing interpolation
Pipe (201) is connected with sealed outer pipe (202)；Retaining mechanism (204) can be located at sealing element (208) above and below, anti-to return the machine of spitting
Structure (205) from-inner-to-outer links up side runner (206) and oil jacket annulus.
3. concentric double pipe according to claim 2 dispenses CO2Tubing string, which is characterized in that the retaining mechanism (204) by
Locking head (303) and claw (305) is divided to constitute, divide claw (305) and locking head (303) respectively with sealed outer pipe (202) and close
Interpolation pipe (201) are sealed to be connected；Claw (305) end is divided to be equipped with internal conical surface (301), correspondingly, locking head (303) end is equipped with
Outer conical surface (304) in locking head (303) and is divided equipped with mutually matched locking shoulder (302) between claw (305), described
Locking shoulder (302) bus and axis angle be 80 °~100 °.
4. concentric double pipe according to claim 2 dispenses CO2Tubing string, which is characterized in that the retaining mechanism (204) by
The housing (503) and inner cylinder mutually nested with protrusion being connected respectively with sealed outer pipe (202) and sealing interpolation pipe (201)
(601) it constitutes, there is radially-inwardly raised inner convex platform (502) in housing (503), inner convex platform (502) has interior shoulder (501)；It is interior
Cylinder (601) is equipped with the outer lug boss (604) of radially outwardly projecting, and outer lug boss (604) is equipped with outer shoulder (603) and confined planes (602).
5. concentric double pipe according to claim 2 dispenses CO2Tubing string, which is characterized in that the retaining mechanism (204) by
Taper facing and intermeshing locking screw, which are paid, to be constituted.
6. concentric double pipe according to claim 5 dispenses CO2Tubing string, which is characterized in that in the taper facing is provided with
The outer cone facing (801) of screw thread is equipped with mutually matched circular conical surface between outer cone facing (801) and sealed outer pipe (202),
Circular conical surface radial direction top and the bottom are diameter big ends, and the interior of external screw thread and outer cone facing (801) is equipped in sealing interpolation pipe (201)
Screw thread collectively forms locking screw and pays.
7. concentric double pipe according to claim 5 dispenses CO2Tubing string, which is characterized in that the taper facing is provided with outer
The female cone facing (902) of screw thread is equipped with mutually matched circular cone between female cone facing (902) and sealing interpolation pipe (201)
Face, circular conical surface radial direction top and the bottom are diameter big ends, and internal screw thread and female cone facing (902) are equipped on sealed outer pipe (202)
External screw thread collectively forms locking screw and pays.
8. dispensing CO according to concentric double pipe described in claim 2~7 any claim2Tubing string, which is characterized in that described
Retaining mechanism (204) is equipped with safe mechanism of slipping out of the hand.
9. concentric double pipe according to claim 1 dispenses CO2Tubing string, which is characterized in that the gas injection valve (11) and lower envelope
In lower setting mechanism (102) are arranged on outer tube (2) between device (9), between gas-separating valve (7) and upper packer (6) or dividing
It is arranged inside air valve (7) upper setting mechanism (101).
10. concentric double pipe according to claim 9 dispenses CO2Tubing string, which is characterized in that the lower setting mechanism (102)
Including valve ball (103) and valve seat (104).
11. concentric double pipe according to claim 10 dispenses CO2Tubing string, which is characterized in that the lower setting mechanism
(102) it is provided between outer tube (2) shear pin (105).
12. concentric double pipe according to claim 9 dispenses CO2Tubing string, which is characterized in that the upper setting mechanism (101)
It is a kind of explosion diaphragm structure, including explosion diaphragm (111), explosion diaphragm (111) is mounted between outer tube (2) and inner tube (3)
Annular space in or gas-separating valve (7) side runner (206) in.
13. concentric double pipe according to claim 9 dispenses CO2Tubing string, which is characterized in that the upper setting mechanism (101)
Including ring piston (121) and shear pin (122), ring piston (121) be set to annular space between outer tube (2) and inner tube (3) or
In annular space between sealed outer pipe (202) and shell (203), the position of the fixed ring piston of setting shear pin (122) in the axial direction.
14. concentric double pipe according to claim 9 dispenses CO2Tubing string, which is characterized in that the upper setting mechanism (101)
The sliding sleeve (131) of sealed sides discharge orifice (133) is used in sealed outer pipe (202) including being arranged, is set in sealing interpolation pipe (201)
Set sliding set shoulder (132).
15. concentric double pipe according to claim 2 dispenses CO2Tubing string, which is characterized in that the Fang Fantu mechanism (205)
It is the ball-and-seat being made of valve ball one (151) and valve seat one (152), the side wall that ball-and-seat is mounted on shell (203) is vertical
In hole, the lower end of ball-and-seat is communicated with side runner (206) and upper end is communicated with oil jacket annulus.
16. concentric double pipe according to claim 2 dispenses CO2Tubing string, which is characterized in that the Fang Fantu mechanism (205)
Including bridge-type pipe nipple (161), valve ball two (164), spring (165) and silk plug (168)；Bridge-type pipe nipple axis sets up three and sinks
Hole, left counterbore (163) are a part of side runner (206)；Right counterbore (167) links up center flow channels (207) up and down；Center counterbore
(162) upper end is connected to left counterbore (163), and inner conical valve seat is set in the middle part of the counterbore of center and is matched with valve ball two (164)
Ball-and-seat is formed, two lower part of valve ball sets holddown spring (165) and silk plug (168), and diameter is arranged in position between valve ball two and silk plug
Center counterbore and oil jacket annulus are linked up to hole (166).
17. concentric double pipe according to claim 1 dispenses CO2Tubing string, which is characterized in that the upper packer (6) and under
Packer (9) all has anchor mechanism.
18. concentric double pipe according to claim 1 dispenses CO2Tubing string, which is characterized in that the inner sleeve of the inner door (4)
(172) inner conical ball seat (173) or concave-convex switch slot (182) are equipped with.
19. concentric double pipe according to claim 1 dispenses CO2Tubing string, which is characterized in that the inner sleeve of the outer door (5)
(172) inner conical ball seat (173) are equipped with.
20. concentric double pipe according to claim 1 dispenses CO2Tubing string, which is characterized in that the inner sleeve of the outer door (5)
(172) it is equipped with concave-convex switch slot (182).
21. concentric double pipe according to claim 20 dispenses CO2Tubing string, which is characterized in that below outer side door (5) or its
Position connects tongue and groove switch (181) in the inner tube (3).
22. being applied to concentric double pipe described in claim 1~20 any claim dispenses CO2The application method of tubing string, it is complete
Well, gas injection step be,
A, gas injection valve (11), lower packet (9), gas-separating valve (7), upper packer (6) and outer lower outer pipe: are sequentially connected using oil pipe
In side door (5) and tripping in casing (1), wherein upper packer (6) is located at the above position of upper oil reservoir (8) and lower packet (9) is placed in
Between upper oil reservoir (8) and lower oil reservoir (10), the sealing interpolation pipe (201) of the gas-separating valve (7) is not gone into the well with outer tube；
B, it replaces into corrosion inhibiter: replacing from oil jacket annulus reacting cycle into corrosion inhibitor solution；
C, upper packer and lower packet set packer: are set by the mode for beating hydraulic in oil pipe；
D, the sealing interpolation pipe (201) and inner door (4) and tripping in outer tube of gas-separating valve (7) lower inner tube: are sequentially connected using inner tube
(2) in, make to seal at interpolation pipe (201) arrival gas-separating valve and lock retaining mechanism (204)；
E, gas injection: the gas of oil reservoir is injected from outer tube and the annular space of inner tube on note, and the gas for pouring down oil reservoir is injected from inner tube；
It plays out job step,
F, first step kill-job: the switching tools for opening inner door (4) to the interior tripping in of inner tube (3) open inner door, link up inner tube and
Annular space between inner and outer pipes, using just wash or backwash by the way of kill-job；
G, it plays inner tube: above proposing inner tube, act inner door and sealing interpolation pipe；
H, second step kill-job: the switching tools for opening outer door (5) to the interior tripping in of outer tube (2) open outer door, link up outer tube and
Oil jacket annulus, using just wash or backwash by the way of kill-job；
I, it plays outer tube: above mentioning deblocking packer, play flowline and all downhole tools.
23. being applied to concentric double pipe described in claim 21 dispenses CO2The application method of tubing string, complete well, gas injection step be,
A, gas injection valve (11), lower packet (9), gas-separating valve (7), upper packer (6) and outer lower outer pipe: are sequentially connected using oil pipe
In side door (5) and tripping in casing (1), wherein upper packer (6) is located at the above position of upper oil reservoir (8) and lower packet (9) is placed in
Between upper oil reservoir (8) and lower oil reservoir (10), the sealing interpolation pipe (201) of the gas-separating valve (7) is not gone into the well with outer tube；
B, it replaces into corrosion inhibiter: replacing from oil jacket annulus reacting cycle into corrosion inhibitor solution；
C, upper packer and lower packet set packer: are set by the mode for beating hydraulic in oil pipe；
D, the sealing interpolation pipe (201), tongue and groove switch (181) and inside of gas-separating valve (7) lower inner tube: are sequentially connected using inner tube
In door (4) and tripping in outer tube (2), makes to seal at interpolation pipe (201) arrival gas-separating valve and lock retaining mechanism (204)；
E, gas injection: the gas of oil reservoir is injected from outer tube and the annular space of inner tube on note, and the gas for pouring down oil reservoir is injected from inner tube；
It plays out job step,
F, first step kill-job: the switching tools for opening inner door (4) to the interior tripping in of inner tube (3) open inner door, link up inner tube and
Annular space between inner and outer pipes, using just wash or backwash by the way of kill-job；
G, it plays inner tube: above proposing inner tube, act inner door, tongue and groove switch (181) and sealing interpolation pipe；Tongue and groove switch is mentioned upper
Outer door is opened in the process, links up outer tube and oil jacket annulus；
H, second step kill-job: oil jacket annulus using just wash or backwash by way of kill-job；
I, it plays outer tube: above mentioning deblocking packer, play flowline and all downhole tools.
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| CN201910536398.3A CN110159234B (en) | 2019-06-20 | 2019-06-20 | Concentric double-tube separate injection of CO 2 Tubular column and use method thereof |
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| CN201910536398.3A CN110159234B (en) | 2019-06-20 | 2019-06-20 | Concentric double-tube separate injection of CO 2 Tubular column and use method thereof |
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| CN111197473A (en) * | 2019-11-15 | 2020-05-26 | 王凯 | Multi-pipe polymer injection device |
| CN111236918A (en) * | 2020-02-27 | 2020-06-05 | 山东省地质科学研究院 | Rock salt mine separate-layer mining pipe column and rock salt mine separate-layer mining method |
| CN111502594A (en) * | 2020-04-28 | 2020-08-07 | 大庆兴华天义石油钻采设备制造有限公司 | Double-tube separate injection tool capable of drilling bridge plug |
| CN112780184A (en) * | 2019-11-11 | 2021-05-11 | 中国石油化工股份有限公司 | Self-balancing anti-pollution well completion pipe string for gas well |
| CN113863907A (en) * | 2020-06-30 | 2021-12-31 | 中国石油天然气股份有限公司 | Carbon dioxide composite layered huff and puff pipe column |
| CN115234203A (en) * | 2022-08-04 | 2022-10-25 | 中国石油化工股份有限公司 | Carbon dioxide oil displacement concentric double-tube separate injection string |
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| CN112780184A (en) * | 2019-11-11 | 2021-05-11 | 中国石油化工股份有限公司 | Self-balancing anti-pollution well completion pipe string for gas well |
| CN111197473A (en) * | 2019-11-15 | 2020-05-26 | 王凯 | Multi-pipe polymer injection device |
| CN111236918A (en) * | 2020-02-27 | 2020-06-05 | 山东省地质科学研究院 | Rock salt mine separate-layer mining pipe column and rock salt mine separate-layer mining method |
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| CN111502594B (en) * | 2020-04-28 | 2024-05-10 | 大庆兴华天义石油钻采设备制造有限公司 | Double-tube separate injection tool capable of drilling bridge plug |
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