CN106368638A - Sleeve damaged position blocking tool and blocking method - Google Patents
Sleeve damaged position blocking tool and blocking method Download PDFInfo
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- CN106368638A CN106368638A CN201510437156.0A CN201510437156A CN106368638A CN 106368638 A CN106368638 A CN 106368638A CN 201510437156 A CN201510437156 A CN 201510437156A CN 106368638 A CN106368638 A CN 106368638A
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- packer
- pipe
- depth
- sleeve pipe
- oil
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Abstract
The invention discloses a sleeve damaged position blocking tool and blocking method and belongs to the technical field of oil recovery. The sleeve damaged position blocking tool comprises a first packer, a second packer, an oil pipe and a depth correction nipple. The depth correction nipple, the first packer and the second packer are connected to the oil pipe in series from top to bottom; and the first packer is located at a damaged position in a sleeve and expanded when encountering water to block the damaged position of the sleeve. According to the sleeve damaged position blocking tool and blocking method, the first packer is provided with a water environment and expanded when encountering the water to block the damaged position of the sleeve, sleeve damaged position blocking is effectively achieved, and therefore water in a shallow stratum is effectively prevented from flowing into oil in an oil well, output liquid in a deep stratum is prevented from flowing from the sleeve damaged position into the shallow stratum, the water content of the oil in the oil well is reduced, and oil recovery efficiency is improved.
Description
Technical field
The present invention relates to oil recovery technique field, particularly to a kind of casing damage capping tools and method for blocking.
Background technology
Oil well pipe in oil exploitation includes flow string and sleeve pipe, and flow string includes oil pipe, sucker rod
And oil well pump, flow string can be lowered in sleeve pipe, thus realizing well recovery.And noted due to long-term
The exploitation of water steam injection, frequently underground work, sleeve pipe material itself and environment to factors such as the corrosion of sleeve pipe,
Sleeve pipe occurs different degrees of breakage, causes well recovery water content to rise, thus reducing oil recovery efficiency.
At present, for casing damage, frequently with method for blocking have casing patching and chemical plugging.Sleeve pipe is mended
Patch, is subsidized to sleeve pipe as patching tube using the seamless pipe that external diameter is less than casing inner diameter, therefore subsidizes
Position caliber slightly reduces, and have impact on and enters under flow string；Chemical plugging, that is, be used in breakage solidification
Or expand chemical agent sleeve pipe is blocked, but the adaptability due to chemical agent itself, stability and
Poor reliability, needs sleeve pipe is frequently blocked, and operation pressure is big, reduces oil recovery efficiency of construction.
Content of the invention
In order to solve problem of the prior art, embodiments provide a kind of casing damage capping tools and
Method for blocking.Described technical scheme is as follows:
On the one hand, there is provided a kind of casing damage capping tools, described capping tools includes: the first packer,
Second packer, oil pipe and school depth pipe nipple；
Described school depth pipe nipple, described first packer and described second packer are serially connected in described oil from top to bottom
Guan Shang, at the damage location that described first packer is located in sleeve pipe, and can block described set after water-swellable
The damage location of pipe.
Alternatively, described first packer is that zys series meets water packer.
Alternatively, described second packer is cup packer.
Alternatively, described oil pipe includes four oil pipe sections, and the first oil pipe section is to connect above the depth pipe nipple of described school
Oil pipe, the second oil pipe section is to connect the oil pipe of described school depth pipe nipple and described first packer, the 3rd oil pipe
For connecting the oil pipe of described first packer and described second packer, the 4th oil pipe section is described second envelope to section
The oil pipe connecting below device.
Alternatively, the length of described second oil pipe section is the first preset length.
Alternatively, the scope of described first preset length is 17～20m.
On the other hand, there is provided a kind of casing damage method for blocking, methods described includes:
Using turbine flow measuring technology, determine the depth of damage location in sleeve pipe；
Using GR school depth measuring technology, determine the depth of casing damage capping tools lieutenant colonel depth pipe nipple position
Degree, the position of described school depth pipe nipple is the position of described school depth pipe nipple upper surface；
The depth of the school depth pipe nipple position being determined according to described GR school depth measuring technology, adjusts described set
The position of pipe capping tools, makes the upper surface of the first packer that described sleeve pipe capping tools includes be located at described
Above the damage location of sleeve pipe, the lower surface of described first packer is located at below the damage location of described sleeve pipe.
Alternatively, the depth of the described school depth pipe nipple position being determined according to described GR school depth measuring technology,
The position of adjustment described sleeve pipe capping tools, makes the upper end of the first packer that described sleeve pipe capping tools includes
Face is located above the damage location of described sleeve pipe, and the lower surface of described first packer is located at the broken of described sleeve pipe
Damage below position, comprising:
Deeply short according to the depth of damage location, the depth of described school depth pipe nipple position, described school in described sleeve pipe
The length of section and the first preset length, determine adjustment distance, and described first preset length is described school depth pipe nipple
Length between lower surface and described first packer upper surface；
According to described adjustment distance, adjust position in described sleeve pipe for the described sleeve pipe capping tools, make adjustment
The upper surface of the first packer afterwards is located at the preset length scope above the damage location of described sleeve pipe, with
And make the lower surface of the first packer after described adjustment be located at the default length below the damage location of described sleeve pipe
At degree scope.
Alternatively, described preset length scope is 1～1.5m.
Technical scheme provided in an embodiment of the present invention has the benefit that in embodiments of the present invention, will
School depth pipe nipple, the first packer and the second packer are serially connected on oil pipe from top to bottom, and when the first packer
When at the damage location in sleeve pipe, inside pipe casing can be insulated formation Liang Ge annular space area by the second packer
Domain, i.e. the first annular region and the second annular region, the first annular region is used for storing water, the second annular space area
Domain is used for storing oil well fluid.First annular region provides a water environment to the first packer, and then makes the
One packer is immersed in water, blocks the damage location of this sleeve pipe, effectively in fact after the first packer water-swellable
Show the closure of casing damage, thus effectively preventing shallow seated groundwater to flow in this second annular region, and resistance
Stop the damage location that fluid in oil well passes through in sleeve pipe to flow in shallow-layer, reduce containing of fluid in oil well
The water yield, and then improve oil recovery efficiency.
Brief description
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to institute in embodiment description
Need use accompanying drawing be briefly described it should be apparent that, drawings in the following description are only the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of casing damage capping tools that the embodiment of the present invention one provides；
Fig. 2 is the structural representation that a kind of casing damage that the embodiment of the present invention two provides blocks flow string；
Fig. 3 is a kind of flow chart of casing damage method for blocking that the embodiment of the present invention three provides；
Fig. 4 is the flow chart of another kind of casing damage method for blocking that the embodiment of the present invention four provides.
Reference:
1: the first packer；2: the second packers；3: oil pipe；4: school depth pipe nipple；
31: the first oil pipe sections；32: the second oil pipe sections；33: the three oil pipe sections；34: the four oil pipe sections；
5: oil well pump；6: screen casing；7: plug.
Specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to the present invention
Embodiment is described in further detail.
Embodiment one
Fig. 1 is a kind of structural representation of casing damage capping tools provided in an embodiment of the present invention.Referring to Fig. 1,
This capping tools includes: the first packer 1, the second packer 2, oil pipe 3 and school depth pipe nipple 4；School is deeply short
Section the 4, first packer 1 and the second packer 2 are serially connected on oil pipe 3 from top to bottom, the first packer 1
At the damage location in sleeve pipe, and the damage location of this sleeve pipe after water-swellable, can be blocked.
In embodiments of the present invention, at the damage location that the first packer 1 is located in sleeve pipe, and this first envelope
Define an annular region between the set tube wall of device 1 and damage location, when pouring water to this annular region
When, the first packer 1 is immersed in the water of this annular region, blocks this after the first packer 1 water-swellable
The damage location of sleeve pipe, effectively achieves the closure of casing damage, thus effectively prevent shallow seated groundwater to flow into should
In oil well, and the fluid in oil well is prevented to pass through, in the damage location inflow shallow-layer in sleeve pipe, to reduce
The water content of fluid in oil well, and then improve oil recovery efficiency.
It should be noted that the diameter of the first packer 1 is less than the internal diameter of sleeve pipe, and this first packer is
Zys series meets water packer, and certainly, this first packer can also have chance water self-expanding function for other
Chance water packer, the embodiment of the present disclosure is not specifically limited to this.
In addition, the second packer 2 is cup packer, certainly, this second packer can also be other
There is the packer of leather cup type packing function, the embodiment of the present disclosure is not specifically limited to this.
Because the second packer 2 is used for providing enough water environments for the first packer 1, therefore select skin
Bowl formula packer.
When the internal diameter with diameter greater than sleeve pipe of the second packer 2, the outward flange of the second packer 2 can be with sleeve pipe
Tube wall fits tightly, and when casing damage capping tools carries out radial-play, set tube wall insulates to second
The play of device 2 has certain resistance, effectively prevents the radial-play of this casing damage capping tools, makes this
The center overlapping of axles of the central shaft of casing damage capping tools and sleeve pipe, thereby it is ensured that this casing damage envelope
Annular region between stifled instrument and set tube wall is concentric uniform annular space.
Further, when the outward flange of the second packer 2 is fitted tightly with set tube wall, inside pipe casing quilt
Packing forms two annular region, i.e. the first annular region and the second annular region, and the first annular region is set
The annular region of the second packer 2 top that pipe breakage capping tools includes, the second annular region breaks for sleeve pipe
Damage the annular region of the second packer 2 lower section that capping tools includes.First annular region is used for storing water,
Second annular region is used for storing oil well fluid.The water of the first annular region storage can give the first packer 1
One water environment is provided, and then so that the first packer 1 is immersed in water, make the first packer 1 water-swellable
Block the damage location of this sleeve pipe afterwards, effectively achieve the closure of casing damage, thus effectively preventing shallow-layer
Water flows in this second annular region, and prevents the fluid in oil well to pass through the damage location stream in sleeve pipe
Enter in shallow-layer, reduce the water content of fluid in oil well, and then improve oil recovery efficiency.
Further, oil pipe 3 includes four oil pipe sections, and the first oil pipe section 31 is that school depth pipe nipple 4 top connects
Oil pipe, the second oil pipe section 32 is to connect the oil pipe of school depth pipe nipple 4 and the first packer 1, the 3rd oil pipe section
33 is the oil pipe connecting the first packer 1 and the second packer 2, and the 4th oil pipe section 34 is the second packer 2
The oil pipe that lower section connects, four oil pipe sections are formed by the oil pipe screw thread concatenation of model n80.
Wherein, the length of the second oil pipe section 32 is the first preset length, and the scope of this first preset length is
17～20m.The length of accurate measurement the second oil pipe section, and make a record.
Because the second oil pipe section 32 is to connect the oil pipe of school depth pipe nipple 4 and the first packer 1, and the second oil pipe
The length range of section 32 is 17～20m, and therefore, the lower surface of school depth pipe nipple 4 is upper with the first packer 1
The distance between end face is 17～20m.When position adjustment is carried out to this casing damage capping tools, in order that
At the damage location that first packer 1 is located in sleeve pipe, can be by adjusting the oil pipe of the top of school depth pipe nipple 4
Length, you can indirectly adjust the position of the first packer 1, makes the first packer 1 broken in sleeve pipe
Damage at position.
It should be noted that this school depth pipe nipple be a length in 1-3m about tubing nipple.
In addition, when the first packer 1 that this casing damage capping tools includes is located at the damage location of sleeve pipe,
First oil pipe section 31, the second oil pipe section 32 are damage location Shang Ding circle in sleeve pipe with the length sum of school depth pipe nipple
Depth, the length of the second oil pipe section 32 is preset length.Therefore, the length of the first oil pipe section 31 is covered
The impact of the depth of damage location in pipe.
Furthermore, because the second packer 2 can also provide a water environment for the first packer 1, that is to say,
First annular region of the second packer more than 2 is used for storing water, therefore, in order that the first packer 1 exists
In the water environment of the first annular region of the second packer more than 2, expansion plugging casing damage position, permissible
The length range of the 3rd oil pipe section 33 is set to 100-500m.
In order to block to the damage location of sleeve pipe by this casing damage capping tools, first can be arranged
The length of oil pipe section 31, the length of the second oil pipe section 32, the length of the 3rd oil pipe section 33, the 4th oil pipe section
34 length, the length of the first packer 1 body, the length of the second packer 2 body, school depth pipe nipple 4
Length and oil well pump 5 body length sum be oil-well pump of oil well depth.
Fig. 2 is the structural representation that a kind of casing damage provided in an embodiment of the present invention blocks flow string.Ginseng
See Fig. 2, this casing damage closure flow string instrument also includes oil well pump 5, screen casing 6 and plug 7；
Oil well pump 5, screen casing 6 and plug 7 are serially connected on oil pipe 3 from top to bottom, and oil well pump 5, screen casing 6
It is located at the lower section of the second packer 2 with plug 7.
That is to say, oil well pump 5, screen casing 6 and plug 7 are serially connected in the 4th oil pipe section 34 from top to bottom, its
In, plug 7 is connected to the bottom of the 4th oil pipe section 34, and the therefore the 4th oil pipe section 34 includes the second packing again
Oil pipe and screen casing 6 and plug 7 that oil pipe that device 2 is connected with oil well pump 5, oil well pump 5 are connected with screen casing 6
The oil pipe connecting.
Because casing damage closure flow string also includes oil well pump 5, screen casing 6 and plug 7, therefore, this set
Pipe damaged closure flow string not only can realize the closure of damage location in sleeve pipe, can also realize oil well and adopt
Oil, and the process of well recovery can be: sucker rod drives oil well pump 5 to be inhaled the fluid in oil well by screen casing
Enter oil pipe 3, and pumped fluid to more than ground by oil pipe 3.
Further, the first packer 1, the second packer 2, school depth pipe nipple 4, oil well pump 5, screen casing 6,
All with threaded between plug 7 and oil pipe 3.
In embodiments of the present invention, high-ranking officers' depth pipe nipple, the first packer and the second packer concatenate from top to bottom
On oil pipe, and when at the damage location that the first packer is located in sleeve pipe, the second packer is by inside pipe casing
Two annular region of formation, i.e. the first annular region and the second annular region, the first annular region can be insulated
For storing water, the second annular region is used for storing oil well fluid.First annular region carries to the first packer
For a water environment, and then so that the first packer is immersed in water, after the first packer water-swellable, block this
The damage location of sleeve pipe, effectively achieves the closure of casing damage, thus effectively prevent shallow seated groundwater to flow into should
In second annular region, and the fluid in oil well is prevented to pass through in the damage location inflow shallow-layer in sleeve pipe,
Reduce the water content of fluid in oil well, and then improve oil recovery efficiency.
Embodiment two
Fig. 3 is a kind of flow chart of casing damage method for blocking provided in an embodiment of the present invention.Referring to Fig. 3, should
Method includes:
Step 301: using turbine flow measuring technology, determine the depth of damage location in sleeve pipe.
Step 302: using GR school depth measuring technology, determine casing damage capping tools lieutenant colonel depth pipe nipple
The depth of position, the position of this school depth pipe nipple is the position of this school depth pipe nipple upper surface.
Step 303: the depth of the school depth pipe nipple position being determined according to this GR school depth measuring technology, adjustment
The position of this sleeve pipe capping tools, so that the upper surface of the first packer that this sleeve pipe capping tools includes is located at should
Above the damage location of sleeve pipe, the lower surface of this first packer is located at below the damage location of this sleeve pipe.
In embodiments of the present invention, using turbine flow, determine the depth of damage location in sleeve pipe, according to this
The depth of casing damage position, using GR school depth measuring technology, measures casing damage capping tools bag
The depth of the school depth pipe nipple position including, the position of adjustment sleeve pipe capping tools, so that sleeve pipe capping tools is included
First packer is located at the damage location of sleeve pipe, and after pouring into water in sleeve pipe, it is swollen that water met by the first packer
The damage location of sleeve pipe after swollen, can be blocked, effectively achieve the closure of casing damage, thus effectively preventing
Shallow seated groundwater flows in oil well, and prevents the fluid in oil well to pass through the damage location inflow shallow-layer in sleeve pipe
In, reduce the water content of fluid in oil well, and then improve oil recovery efficiency.
Alternatively, the depth of the school depth pipe nipple position being determined according to GR school depth measuring technology, adjusting sleeve
The position of pipe capping tools, makes the upper surface of the first packer that sleeve pipe capping tools includes be located at the broken of sleeve pipe
Damage above position, the lower surface of the first packer is located at below the damage location of this sleeve pipe, comprising:
The depth of the damage location according to this sleeve pipe, school depth pipe nipple position depth, school depth pipe nipple length and
First preset length, determines adjustment distance, this first preset length be this school depth pipe nipple lower surface with this first
Length between packer upper surface；
According to this adjustment distance, adjust this position in sleeve pipe for sleeve pipe capping tools, make first after adjustment
The upper surface of packer is located at the preset length scope above the damage location of this sleeve pipe, and after making adjustment
The first packer lower surface be located at this sleeve pipe damage location below preset length scope at.
Alternatively, this preset length scope is 1～1.5m.
Above-mentioned all optional technical schemes, all can be according to the alternative embodiment arbitrarily combining to form the present invention, this
Inventive embodiments no longer repeat one by one to this.
Embodiment three
Fig. 4 is the flow chart of another kind casing damage method for blocking provided in an embodiment of the present invention.Referring to Fig. 4,
The method includes:
Step 401: using turbine flow measuring technology, determine the depth of damage location in sleeve pipe.
It should be noted that in the present invention, turbine flow measuring technology is in production and test technology for oil field
One basic fundamental, those skilled in the art are very familiar with and commonly used, and the present invention is not described in detail to this.
It should be noted that will enter under turbine flowmeter to enter mode under in sleeve pipe and be: by under workover rig hook
Enter at 2～3m to above well head, using elevator, fixed pulley is connected on this workover rig hook, and pass through turbine
Turbine flowmeter is connected on this fixed pulley the cable of effusion meter, discharges cable by cable car, and then releases
The turbine flowmeter that unwrapping wire cable connects.Certainly, entering mode under this can also be other modes, and the present invention is implemented
Example is not specifically limited to this.
Further, before the depth of damage location in determining sleeve pipe, need in advance oil well to be carried out sand washing and
Visit sand face, sand washing and visit sand face and include following seven operating procedures:
Operating procedure one, plays producing well and normally recovers the oil the flow string of production.
Operating procedure two, under enter sand-flushing pipe column with sand-washing pen point, the depth in sand face, sand washing in detecting shaft
Tubing string is formed by oil pipe and sand-washing pen point are threaded from top to bottom, and this oil pipe is the additional heat-bodied oil of external diameter 73mm
Pipe, the region between sand-flushing pipe column and internal surface of sleeve pipe is oil jacket annular space.
Operating procedure three, pumps into sand cleaning fluid into sleeve pipe by sand-flushing pipe column and carries out sand washing, the sand washing after sand washing
Liquid is returned out by oil jacket annular space, and sand washing reaches the distance of sand face to the artificial bottom of a well in well between 5～10m, punching
Until stopping sand washing when the sand content in the sand cleaning fluid of discharge is negligible, the displacement control of sand cleaning fluid exists sand
15-25m3/h.
It should be noted that this sand cleaning fluid is clear water, certainly, this sand cleaning fluid can also have necessarily for other
The liquid of carrying capacity, the embodiment of the present invention is not specifically limited to this.
Operating procedure four, after completing sand washing, acts sand-flushing pipe column.
Step 402: using GR school depth measuring technology, determine casing damage capping tools lieutenant colonel depth pipe nipple
The depth of position, the position of this school depth pipe nipple is the position of this school depth pipe nipple upper surface.
It should be noted that in the present invention, GR school depth measuring technology is production and test technology for oil field
An interior basic fundamental, those skilled in the art are very familiar with and commonly used, and the embodiment of the present invention is to this not
It is described in detail.
Furthermore, in sleeve pipe under enter casing damage capping tools before it is thus necessary to determine that sleeve pipe whether gross distortion and
Obturator in removing sleeve pipe it is therefore desirable to carry out drifting and scraping in advance, drifting and scraping include to sleeve pipe
Following six operating procedure:
Operating procedure one, to enter under the speed of 8～10m/min with a diameter of 118mm drift size gauge tool in sleeve pipe
Drifting tubing string to sand face, the internal diameter of this sleeve pipe is 124.3mm, and the external diameter of sleeve pipe is 139.7mm, drifting
Tubing string is by oil pipe, oil pipe becomes buckle joint and drift size gauge tool is threaded from top to bottom forms.
Operating procedure two, pumps into flushing fluid from oil jacket annular space and carries out anti-flushing well, the flushing fluid after well-flushing is by oil pipe
Return out, the displacement control of flushing fluid is in 15～20m3/ h, can up to the impurity content in the flushing fluid entering, discharging
When ignoring, stop well-flushing.
Operating procedure three, acts drifting tubing string.
Operating procedure four, in sleeve pipe under enter scraping tubing string with gx-t140 casing scraper, to full well
Section sleeve pipe carries out a scraping, removes dirt, wax and other sleeve pipe tube wall attachment of down-hole casing tube wall, scrapes
Cut tubing string by oil pipe, oil pipe becomes buckle joint and gx-t140 casing scraper is threaded from top to bottom forms.
Operating procedure five, will enter the damage location model symmetrical above and below to sleeve pipe under the scraper in scraping tubing string
Scraping 3 times repeatedly in enclosing, the length of this scope symmetrical above and below is 10～30m.
Operating procedure six, acts scraping tubing string.
Step 403: the school depth pipe nipple depth being obtained according to this GR school depth measuring technology, adjust this sleeve pipe
The position of capping tools, makes the upper surface of the first packer that this sleeve pipe capping tools includes be located at this sleeve pipe
Above damage location, the lower surface of this first packer is located at below the damage location of this sleeve pipe.
Alternatively, the preset length scope above and below casing damage position is 1～1.5m.
Specifically, the school depth pipe nipple that sleeve pipe capping tools includes is determined according to GR school depth measuring technology
Position, the position of this school depth pipe nipple is the position of this school depth pipe nipple upper surface, by the depth of the damage location of sleeve pipe
Degree deducts the depth of the position of school depth pipe nipple, then deducts the school depth length of pipe nipple and the first preset length, obtains
Adjustment distance, the first preset length is the length between the lower surface of school depth pipe nipple and the upper surface of the first packer
Degree.According to this adjustment distance, adjust the position of this casing damage capping tools, so that sleeve pipe capping tools is included
The upper surface of the first packer be located above the damage location of sleeve pipe, the lower surface of the first packer is located at institute
State below the damage location of sleeve pipe.
In order to be accurately determined the position of school depth pipe nipple, the second oil pipe section at least includes two oil pipes, this two
The length range of oil pipe is 17～20m.
In addition, in embodiments of the present invention, using GR school depth measuring technology, determine sleeve pipe closure work
The method of the position of school depth pipe nipple that tool includes may be referred to correlation technique, and the embodiment of the present invention is not carried out to this
Elaborate.
Alternatively, according to adjustment distance, adjust the position of this casing damage capping tools, make the first packer
Upper surface be located above the damage location of sleeve pipe, and the lower surface of the first packer is located at the broken of this sleeve pipe
After damaging below position, this casing damage capping tools can be adjusted the distance of 1～1.5m scope, make first
The upper surface of packer is located in the range of the preset length of 1～1.5m above the damage location of sleeve pipe and the first envelope
It is located in the range of the preset length of 1～1.5m below the damage location of sleeve pipe it is ensured that the first envelope every the lower surface of device
This damage location can be blocked every device completely, thus when the annular space area to this second packer and formation in sleeve pipe
When pouring water in domain, the first packer may be dipped in the water of this annular region, makes the first packer water-swellable
Block the damage location of this sleeve pipe afterwards, effectively achieve casing damage closure, so effective stop shallow seated groundwater by
Damage location in sleeve pipe flows in oil well, causes oil well fluid water content to rise, reduces oil recovery efficiency.
Further, in adjustment casing damage capping tools, make the damaged position that the first packer is located in sleeve pipe
In addition it is also necessary to carry out following four operating procedure after putting, just enable the oil recovery of this casing damage capping tools
Closure function it may be assumed that
Operating procedure one: connect this casing damage capping tools in pithead position installation well mouth hanger and hang on
It is fixed in well head big four, effectively prevent the movement of this casing damage capping tools position.
Further, because casing damage capping tools is hydro-expansive rubber, this rubber is in water bath
Not collapsible, therefore when packer has needed sleeve pipe, the frictional force of packer rubber and internal surface of sleeve pipe is very
Greatly, therefore in embodiments of the present invention, the casing damage length that casing damage capping tools can block determines
For 1～2m.
Operating procedure two: sleeve gate is passed through on ground using pump truck, pumps into clear water, the row of clear water into well
Amount controls in 30～40m3/ h, makes liquid level be located at well head.
Operating procedure three: enter bar assembly of pumping under in oil pipe, oil pumping bar assembly includes sucker rod and sucker rod
The oil pump plunger piston connecting.
Operating procedure four: sucker rod is connected with oil pumper by polished rod eye, and closing well 7 days, you can real
The now oil recovery closure function of this casing damage capping tools.
In embodiments of the present invention, using turbine flow logging technique, determine the depth of damage location in sleeve pipe,
According to the depth of this casing damage position, using GR school depth measuring technology, adjust sleeve pipe capping tools
Position, so that the first packer that sleeve pipe capping tools includes is located at the damage location of sleeve pipe, when in sleeve pipe
After inside pouring into water, after the first packer water-swellable, the damage location of sleeve pipe can be blocked, effectively achieve set
The damaged closure of pipe, thus effectively preventing shallow seated groundwater to flow in oil well, and prevents the fluid in oil well
Flowed in shallow-layer by the damage location in sleeve pipe, reduce the water content of fluid in oil well, and then improve
Oil recovery efficiency.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can be passed through
Hardware come to complete it is also possible to instructed by program correlation hardware complete, described program can be stored in
In a kind of computer-readable recording medium, storage medium mentioned above can be read only memory, disk or
CD etc..
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all the present invention's
Within spirit and principle, any modification, equivalent substitution and improvement made etc., should be included in the present invention's
Within protection domain.
Claims (9)
1. a kind of casing damage capping tools is it is characterised in that described capping tools includes: the first packer,
Second packer, oil pipe and school depth pipe nipple；
Described school depth pipe nipple, described first packer and described second packer are serially connected in described oil from top to bottom
Guan Shang, at the damage location that described first packer is located in sleeve pipe, and can block described set after water-swellable
The damage location of pipe.
2. capping tools as claimed in claim 1 is it is characterised in that described first packer is zys
Series meets water packer.
3. capping tools as claimed in claim 1 is it is characterised in that described second packer is leather cup type
Packer.
4. capping tools as claimed in claim 1 is it is characterised in that described oil pipe includes four oil pipe sections,
First oil pipe section is the oil pipe connecting above the depth pipe nipple of described school, and the second oil pipe section is to connect described school depth pipe nipple
With the oil pipe of described first packer, the 3rd oil pipe section is to connect described first packer and described second packing
The oil pipe of device, the 4th oil pipe section is the oil pipe connecting below described second packer.
5. capping tools as claimed in claim 4 is it is characterised in that the length of described second oil pipe section is
First preset length.
6. capping tools as claimed in claim 5 is it is characterised in that the scope of described first preset length
For 17～20m.
7. a kind of casing damage method for blocking is it is characterised in that methods described adopts the claims 1-6
Casing damage capping tools described in any claim, described method for blocking includes:
Using turbine flow measuring technology, determine the depth of damage location in sleeve pipe；
Using GR school depth measuring technology, determine the depth of casing damage capping tools lieutenant colonel depth pipe nipple position
Degree, the position of described school depth pipe nipple is the position of described school depth pipe nipple upper surface；
The depth of the school depth pipe nipple position being determined according to described GR school depth measuring technology, adjusts described set
The position of pipe capping tools, makes the upper surface of the first packer that described sleeve pipe capping tools includes be located at described
Above the damage location of sleeve pipe, the lower surface of described first packer is located at below the damage location of described sleeve pipe.
8. method for blocking as claimed in claim 7 it is characterised in that described according to described GR school
The depth of the school depth pipe nipple position that deep measuring technology determines, the position of adjustment described sleeve pipe capping tools, make institute
The upper surface stating the first packer that sleeve pipe capping tools includes is located above the damage location of described sleeve pipe, institute
The lower surface stating the first packer is located at below the damage location of described sleeve pipe, comprising:
Deeply short according to the depth of damage location, the depth of described school depth pipe nipple position, described school in described sleeve pipe
The length of section and the first preset length, determine adjustment distance, and described first preset length is described school depth pipe nipple
Length between lower surface and described first packer upper surface；
According to described adjustment distance, adjust position in described sleeve pipe for the described sleeve pipe capping tools, make adjustment
The upper surface of the first packer afterwards is located at the preset length scope above the damage location of described sleeve pipe, with
And make the lower surface of the first packer after described adjustment be located at the default length below the damage location of described sleeve pipe
At degree scope.
9. method for blocking as claimed in claim 8 is it is characterised in that described preset length scope is
1～1.5m.
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| CN201510437156.0A CN106368638B (en) | 2015-07-23 | 2015-07-23 | Casing damage capping tools and method for blocking |
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| CN201510437156.0A CN106368638B (en) | 2015-07-23 | 2015-07-23 | Casing damage capping tools and method for blocking |
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| CN106368638A true CN106368638A (en) | 2017-02-01 |
| CN106368638B CN106368638B (en) | 2019-04-09 |
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| CN106368638B (en) | 2019-04-09 |
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