CN106368638B - casing damage plugging tool and plugging method - Google Patents
casing damage plugging tool and plugging method Download PDFInfo
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- CN106368638B CN106368638B CN201510437156.0A CN201510437156A CN106368638B CN 106368638 B CN106368638 B CN 106368638B CN 201510437156 A CN201510437156 A CN 201510437156A CN 106368638 B CN106368638 B CN 106368638B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 210000002445 nipple Anatomy 0.000 claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 230000000903 blocking effect Effects 0.000 claims abstract description 13
- 238000005516 engineering process Methods 0.000 claims description 25
- 238000012856 packing Methods 0.000 claims description 4
- 239000003129 oil well Substances 0.000 abstract description 37
- 239000012530 fluid Substances 0.000 abstract description 8
- 238000000605 extraction Methods 0.000 abstract 2
- 239000007788 liquid Substances 0.000 description 22
- 239000004576 sand Substances 0.000 description 19
- 238000011017 operating method Methods 0.000 description 17
- 238000011084 recovery Methods 0.000 description 16
- 238000011010 flushing procedure Methods 0.000 description 11
- 238000005406 washing Methods 0.000 description 11
- 238000007790 scraping Methods 0.000 description 8
- 239000003673 groundwater Substances 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000013043 chemical agent Substances 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 235000020681 well water Nutrition 0.000 description 2
- 241000269793 Cryothenia peninsulae Species 0.000 description 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a casing damage plugging tool and a plugging method, and belongs to the technical field of oil extraction. The casing breakage plugging tool comprises: the packer comprises a first packer, a second packer, an oil pipe and a depth correcting nipple; the depth correcting short section, the first packer and the second packer are connected in series from top to bottom on the oil pipe, the first packer is located at the damaged position in the sleeve, and the damaged position of the sleeve can be blocked after the first packer is expanded when encountering water. According to the invention, the first packer is provided with the water environment, so that the damaged position of the sleeve is blocked after the first packer swells in water, and the damaged blocking of the sleeve is effectively realized, thus effectively preventing the water in the shallow stratum from flowing into the oil in the oil well, preventing the produced fluid in the deep stratum from entering the shallow stratum through the damaged position of the sleeve, reducing the water content of the oil in the oil well, and further improving the oil extraction efficiency.
Description
Technical field
The present invention relates to oil recovery technique field, in particular to a kind of casing damage capping tools and method for blocking.
Background technique
Oil well pipe in oil exploitation includes flow string and casing, and flow string includes oil pipe, sucker rod and oil pumping
Pump, flow string can be lowered into casing, to realize well recovery.And since long-term injecting water steam injection is developed, frequently
To factors such as the corrosion of casing, casing will appear different degrees of breakage for underground work, casing itself material and environment, cause
Well recovery water content rises, to reduce oil recovery efficiency.
Currently, be directed to casing damage, frequently with method for blocking have casing patching and chemical plugging.Casing patching is adopted
The seamless pipe for using outer diameter to be less than casing inner diameter subsidizes casing as patching tube, therefore subsidizes position caliber and slightly reduce,
Affect the tripping in of flow string；Chemical plugging, that is, the chemical agent for being used in breakage solidification or expansion seal casing
It is stifled, but due to the adaptability, stability and poor reliability of chemical agent itself, it needs frequently to block casing, construct
Pressure is big, reduces oil recovery construction efficiency.
Summary of the invention
In order to solve problems in the prior art, the embodiment of the invention provides a kind of casing damage capping tools and closure sides
Method.The technical solution is as follows:
On the one hand, a kind of casing damage capping tools are provided, the capping tools include: the first packer, the second envelope
Every device, oil pipe and school depth pipe nipple；
The school depth pipe nipple, first packer and second packer are serially connected in from top to bottom on the oil pipe,
First packer is located at the damage location in casing, and the damage location of described sleeve pipe can be blocked after water-swellable.
Optionally, first packer is that ZYS series meets water packer.
Optionally, second packer is cup packer.
Optionally, the oil pipe includes four oil pipe sections, and the first oil pipe section is the oil pipe connected above the school depth pipe nipple,
Second oil pipe section is the oil pipe for connecting the school depth pipe nipple and first packer, and third oil pipe section is to connect first envelope
Every the oil pipe of device and second packer, the 4th oil pipe section is the oil pipe connected below second packer.
Optionally, the length of the second oil pipe section is the first preset length.
Optionally, the range of first preset length is 17~20m.
On the other hand, a kind of casing damage method for blocking is provided, which comprises
Using turbine flow measuring technology, the depth of damage location in casing is determined；
Using natural gamma school depth measuring technology, the depth of casing damage capping tools lieutenant colonel's depth pipe nipple position, institute are determined
The position for stating school depth pipe nipple is the position of the school depth pipe nipple upper surface；
According to the depth for the school depth pipe nipple position that the natural gamma school depth measuring technology determines, adjustment described sleeve pipe is blocked
The upper surface of the position of tool, the first packer for making described sleeve pipe capping tools include is located on the damage location of described sleeve pipe
Side, the lower end surface of first packer are located at below the damage location of described sleeve pipe.
Optionally, the depth of the school depth pipe nipple position determined according to the natural gamma school depth measuring technology, adjustment
The upper surface of the position of described sleeve pipe capping tools, the first packer for making described sleeve pipe capping tools include is located at described sleeve pipe
Damage location above, the lower end surface of first packer be located at described sleeve pipe damage location lower section, comprising:
According to the depth of damage location, the depth of the school depth pipe nipple position, the length of the school depth pipe nipple in described sleeve pipe
Degree and the first preset length determine that adjustment distance, first preset length are the school depth pipe nipple lower end surface and described first
Length between packer upper surface；
According to the adjustment distance, position of the described sleeve pipe capping tools in described sleeve pipe is adjusted, makes adjusted the
The upper surface of one packer is located at the preset length range above the damage location of described sleeve pipe, and makes described adjusted
The lower end surface of first packer is located at the preset length range below the damage location of described sleeve pipe.
Optionally, the preset length range is 1~1.5m.
Technical solution provided in an embodiment of the present invention has the benefit that in embodiments of the present invention, high-ranking officers are deeply short
Section, the first packer and the second packer are serially connected on oil pipe from top to bottom, and when the first packer is located at the breakage in casing
When at position, the second packer can insulate inside pipe casing to form two annular regions, i.e. the first annular region and the second ring
Empty region, the first annular region is for storing water, and the second annular region is for storing oil well oil liquid.First annular region gives first
Packer provides a water environment, and then impregnates the first packer in water, blocks the set after the first packer water-swellable
The damage location of pipe effectively realizes the closure of casing damage, so that shallow seated groundwater effectively be prevented to flow into second annular region
It is interior, and oil liquid in oil well is prevented to flow into shallow-layer by the damage location in casing, reduce containing for oil liquid in oil well
Water, and then improve oil recovery efficiency.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of structural schematic diagram for casing damage capping tools that the embodiment of the present invention one provides；
Fig. 2 is the structural schematic diagram that a kind of casing damage provided by Embodiment 2 of the present invention blocks flow string；
Fig. 3 is a kind of flow chart for casing damage method for blocking that the embodiment of the present invention three provides；
Fig. 4 is the flow chart for another casing damage method for blocking that the embodiment of the present invention four provides.
Appended drawing 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: third oil pipe section；34: the four oil pipe sections；
5: oil well pump；6: screen casing；7: silk plug.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment one
Fig. 1 is a kind of structural schematic diagram of casing damage capping tools provided in an embodiment of the present invention.Referring to Fig. 1, the envelope
Stifled tool includes: the first packer 1, the second packer 2, oil pipe 3 and school depth pipe nipple 4；School depth pipe nipple 4, the first packer 1 and
Two packers 2 are serially connected in from top to bottom on oil pipe 3, and the first packer 1 is located at the damage location in casing, and after water-swellable
The damage location of the casing can be blocked.
In embodiments of the present invention, the first packer 1 is located at the damage location in casing, and first packer 1 with
An annular region is formd between the set tube wall of damage location, when pouring water to the annular region, the first packer 1 impregnates
In the water of the annular region, the damage location of the casing is blocked after 1 water-swellable of the first packer, and it is broken effectively to realize casing
The closure of damage so that shallow seated groundwater effectively be prevented to flow into the oil well, and prevents the oil liquid in oil well to pass through in casing
Damage location flows into shallow-layer, reduces the water content of oil liquid 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 casing, and first packer is ZYS series
Water packer is met, certainly, which can also have the chance water packer for meeting water self-expanding function, the disclosure for other
Embodiment is not specifically limited in this embodiment.
In addition, the second packer 2 is cup packer, certainly, which can also be other with leather cup
Formula insulates the packer of function, and the embodiment of the present disclosure is not specifically limited in this embodiment.
Since the second packer 2 is used to provide enough water environments for the first packer 1, leather cup type packing is selected
Device.
When the diameter of the second packer 2 is greater than the internal diameter of casing, the outer edge of the second packer 2 can be close with set tube wall
Fitting, and when casing damage capping tools carry out radial-play, set tube wall has certain resistance to the play of the second packer 2
Power effectively prevents the radial-play of the casing damage capping tools, makes the central axis and casing of the casing damage capping tools
Center overlapping of axles, thereby it is ensured that the annular region between the casing damage capping tools and set tube wall is concentric uniform
Annular space.
Further, when the outer edge of the second packer 2 and set tube wall fit closely, inside pipe casing is formed by packing
Two annular regions, i.e. the first annular region and the second annular region, the first annular region are that casing damage capping tools include
The top of the second packer 2 annular region, the second annular region is under the second packer 2 that casing damage capping tools include
The annular region of side.First annular region is for storing water, and the second annular region is for storing oil well oil liquid.First annular region
The water of storage can provide a water environment to the first packer 1, and then impregnate the first packer 1 in water, make the first envelope
The damage location that the casing is blocked after 1 water-swellable of device, effectively realizes the closure of casing damage, to effectively prevent shallow
Layer water flows into second annular region, and the oil liquid in oil well is prevented to flow into shallow-layer by the damage location in casing
In, the water content of oil liquid in oil well is reduced, and then improve oil recovery efficiency.
Further, oil pipe 3 includes four oil pipe sections, and the first oil pipe section 31 is the oil pipe connected above school depth pipe nipple 4, the
Two oil pipe sections 32 are the oil pipe for connecting school depth pipe nipple 4 and the first packer 1, third oil pipe section 33 be the first packer 1 of connection and
The oil pipe of second packer 2, the 4th oil pipe section 34 are the oil pipe connected below the second packer 2, and four oil pipe sections are by model
It is concatenated for the oil pipe of N80 with screw thread.
Wherein, the length of the second oil pipe section 32 is the first preset length, and the range of first preset length is 17~20m.
The length of precise measurement the second oil pipe section, and make a record.
Since the second oil pipe section 32 is the oil pipe for connecting school depth pipe nipple 4 and the first packer 1, and the length of the second oil pipe section 32
Degree range is 17~20m, therefore, the distance between upper surface of the lower end surface of school depth pipe nipple 4 and the first packer 1 for 17~
20m.When carrying out position adjustment to the casing damage capping tools, in order to make the first packer 1 be located at the damaged position in casing
Place is set, can adjust indirectly the position of the first packer 1 by adjusting the tubing length of the top of school depth pipe nipple 4, makes
One packer 1 is located at the damage location in casing.
It should be noted that the school depth pipe nipple is tubing nipple of the root long degree in 1-3m or so.
In addition, when the first packer 1 that the casing damage capping tools include is located at the damage location of casing, the first oil
Depth of the sum of the length of pipeline section 31, the second oil pipe section 32 and school depth pipe nipple for damage location Shang Ding circle in casing, the second oil pipe
The length of section 32 is preset length.Therefore, the length of the first oil pipe section 31 is influenced by the depth of damage location in casing.
Furthermore it since the second packer 2 can also provide a water environment for the first packer 1, that is to say, the second packing
First annular region of 2 or more device is for storing water, therefore, in order to make the first packer 1 the first of the second 2 or more packer
Expansion plugging casing damage position in the water environment of annular region can set the length range of third oil pipe section 33 to
100-500m。
In order to block by the casing damage capping tools to the damage location of casing, the first oil pipe section can be set
31 length, the length of the second oil pipe section 32, the length of third oil pipe section 33, the length of the 4th oil pipe section 34, the first packer 1
The sum of the length of ontology, the length of 2 ontology of the second packer, the length of school depth pipe nipple 4 and length of 5 ontology of oil well pump are oil well
The depth of oil well pump.
Fig. 2 is the structural schematic diagram that a kind of casing damage provided in an embodiment of the present invention blocks flow string.Referring to fig. 2,
It further includes oil well pump 5, screen casing 6 and silk plug 7 that the casing damage, which blocks flow string tool,；
Oil well pump 5, screen casing 6 and silk plug 7 are serially connected in from top to bottom on oil pipe 3, and oil well pump 5, screen casing 6 and silk plug 7 are located at
The lower section of second packer 2.
It that is to say, oil well pump 5, screen casing 6 and silk plug 7 are serially connected in from top to bottom in the 4th oil pipe section 34, wherein silk plug 7 connects
Connect in the bottom end of the 4th oil pipe section 34, thus the 4th oil pipe section 34 include again the second packer 2 connect with oil well pump 5 oil pipe,
The oil pipe that the oil pipe and screen casing 6 that oil well pump 5 is connect with screen casing 6 are connect with silk plug 7.
It further include oil well pump 5, screen casing 6 and silk plug 7 since casing damage blocks flow string, casing damage envelope
The closure of damage location in casing not only may be implemented in stifled flow string, can also realize well recovery, and the mistake of well recovery
Journey can be with are as follows: sucker rod drives oil well pump 5 that the oil liquid in oil well is sucked oil pipe 3 by screen casing, and is pumped oil liquid by oil pipe 3
To more than ground.
Further, the first packer 1, the second packer 2, school depth pipe nipple 4, oil well pump 5, screen casing 6, silk plug 7 and oil pipe 3
Between be threadedly coupled.
In embodiments of the present invention, high-ranking officers' depth pipe nipple, the first packer and the second packer are serially connected in oil pipe from top to bottom
On, and when at the damage location that the first packer is located in casing, inside pipe casing can be insulated formation two by the second packer
A annular region, i.e. the first annular region and the second annular region, the first annular region are used for storing water, the second annular region
In storage oil well oil liquid.First annular region provides a water environment to the first packer, and then is immersed in the first packer
In water, the damage location of the casing is blocked after the first packer water-swellable, effectively realizes the closure of casing damage, to have
Effect prevents shallow seated groundwater to flow into second annular region, and the oil liquid in oil well is prevented to pass through the damage location in casing
It flows into shallow-layer, reduces the water content of oil liquid 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, this method packet
It includes:
Step 301: using turbine flow measuring technology, determine the depth of damage location in casing.
Step 302: using natural gamma school depth measuring technology, determine casing damage capping tools lieutenant colonel's depth pipe nipple position
Depth, the position of the school depth pipe nipple are the position of the school depth pipe nipple upper surface.
Step 303: according to the depth for the school depth pipe nipple position that the natural gamma school depth measuring technology determines, adjusting the casing
The upper surface of the position of capping tools, the first packer for making the casing capping tools include is located on the damage location of the casing
Side, the lower end surface of first packer are located at below the damage location of the casing.
In embodiments of the present invention, using turbine flow, the depth of damage location in casing is determined, according to the casing damage
The depth of position measures the school depth pipe nipple position that casing damage capping tools include using natural gamma school depth measuring technology
Depth, adjusts the position of casing capping tools, and the first packer for making casing capping tools include is located at the damage location of casing
Place, after pouring into water in casing, after the first packer water-swellable, can block the damage location of casing, effectively realize set
The closure of pipe breakage so that shallow seated groundwater effectively be prevented to flow into oil well, and prevents the oil liquid in oil well to pass through in casing
Damage location flow into shallow-layer in, reduce the water content of oil liquid in oil well, and then improve oil recovery efficiency.
Optionally, the depth of the school depth pipe nipple position determined according to natural gamma school depth measuring technology, adjustment casing block
The position of tool, the upper surface for the first packer for making casing capping tools include are located above the damage location of casing, and first
The lower end surface of packer is located at below the damage location of the casing, comprising:
It is pre- according to the depth of the damage location of the casing, the depth of school depth pipe nipple position, the length of school depth pipe nipple and first
If length, adjustment distance is determined, first preset length is between the school depth pipe nipple lower end surface and the first packer upper surface
Length；
According to the adjustment distance, the position of the casing capping tools in casing is adjusted, the first packer adjusted is made
Upper surface be located at the preset length range above the damage location of the casing, and make under the first packer adjusted
End face is located at the preset length range below the damage location of the casing.
Optionally, which is 1~1.5m.
All the above alternatives, can form alternative embodiment of the invention according to any combination, and the present invention is real
It applies example and this is no longer repeated one by one.
Embodiment three
Fig. 4 is the flow chart of another casing damage method for blocking provided in an embodiment of the present invention.Referring to fig. 4, this method
Include:
Step 401: using turbine flow measuring technology, determine the depth of damage location in casing.
It should be noted that in the present invention, turbine flow measuring technology is the Xiang Ji in production and test technology for oil field
This technology, those skilled in the art are very familiar with and are commonly used, and the present invention is to this without elaborating.
It should be noted that by the tripping in mode in turbine flowmeter tripping in casing are as follows: by workover rig hook tripping in well
Fixed pulley, is connected on the workover rig hook by mouthful top place 2~3m using elevator, and by the cable of turbine flowmeter by whirlpool
Flowmeters are connected on the fixed pulley, discharge cable by cable car, and then discharge the turbine flowmeter of cable connection.When
So, which can also be other modes, and the embodiment of the present invention is not specifically limited in this embodiment.
Further, it in determining casing before the depth of damage location, needs to carry out sand washing to oil well in advance and visits sand face,
Sand washing and spy sand face include following seven operating procedures:
Operating procedure one plays producing well and normally recovers the oil the flow string of production.
Operating procedure two, tripping in have the sand-flushing pipe column of sand-washing pen point, and the depth in sand face in detecting shaft, sand-flushing pipe column is by oil
Pipe and sand-washing pen point are threadedly coupled composition from top to bottom, which is outer diameter 73mm external upset tubing, in sand-flushing pipe column and casing
Region between wall is oil jacket annulus.
Operating procedure three is pumped into sand cleaning fluid into casing by sand-flushing pipe column and carries out sand washing, and the sand cleaning fluid after sand washing is by oil
Set annular space returns out, and sand washing reaches the distance of sand face to the artificial bottom of a well in well between 5~10m, and sand washing is until the sand washing being discharged
Sand content in liquid stops sand washing when negligible, and the displacement control of sand cleaning fluid is in 15-25m3/h。
It should be noted that the sand cleaning fluid is clear water, certainly, which can also be other with certain carrying capacity
Liquid, the embodiment of the present invention is not specifically limited in this embodiment.
Operating procedure four after completing sand washing, acts sand-flushing pipe column.
Step 402: using natural gamma school depth measuring technology, determine casing damage capping tools lieutenant colonel's depth pipe nipple position
Depth, the position of the school depth pipe nipple are the position of the school depth pipe nipple upper surface.
It should be noted that in the present invention, natural gamma school depth measuring technology is one in production and test technology for oil field
Item basic fundamental, those skilled in the art are very familiar with and are commonly used, and the embodiment of the present invention is to this without elaborating.
Furthermore in casing before tripping in casing damage capping tools, it is thus necessary to determine that whether casing is severely deformed and removes set
Obturator in pipe, it is therefore desirable to drifting and scraping be carried out to casing in advance, drifting and scraping include following six operating procedure:
Operating procedure one has the drifting that diameter is 118mm gauguste cutter in casing with the speed tripping in of 8~10m/min
Tubing string is to sand face, and the internal diameter of the casing is 124.3mm, and the outer diameter of casing is 139.7mm, and drifting tubing string is by oil pipe, oil pipe variable buckle
Connector and gauguste cutter are threadedly coupled composition from top to bottom.
Operating procedure two is pumped into flushing fluid from oil jacket annulus and carries out anti-flushing well, and the flushing fluid after well-flushing is returned out by oil pipe, washed
The displacement control of well liquid is in 15~20m3/ h, until stopping well-flushing when negligible into the impurity content in the flushing fluid of, discharge.
Operating procedure three acts drifting tubing string.
Operating procedure four, in casing tripping in have GX-T140 casing scraper scraping tubing string, to full well section casing into
Row one plows scraping, removes dirt, wax and the other casing tube wall attachments of down-hole casing tube wall, and scraping tubing string is become by oil pipe, oil pipe
Buckle joint and GX-T140 casing scraper are threadedly coupled composition from top to bottom.
Operating procedure five, will be anti-in damage location of the scraper tripping in into the casing range symmetrical above and below in scraping tubing string
Multiple scraping 3 times, the length of the range symmetrical above and below is 10~30m.
Operating procedure six acts scraping tubing string.
Step 403: the school depth pipe nipple depth obtained according to the natural gamma school depth measuring technology adjusts the casing and blocks work
The position of tool, the upper surface for the first packer for making the casing capping tools include are located above the damage location of the casing, should
The lower end surface of first packer is located at below the damage location of the casing.
Optionally, the preset length range above and below casing damage position is 1~1.5m.
Specifically, the position of school depth pipe nipple that casing capping tools include is determined according to natural gamma school depth measuring technology,
The position of the school depth pipe nipple is the position of the school depth pipe nipple upper surface, and the depth of the damage location of casing is subtracted school depth pipe nipple
The depth of position, then the length and the first preset length of school depth pipe nipple are subtracted, it is adjusted distance, the first preset length is that school is deep
Length between the lower end surface of pipe nipple and the upper surface of the first packer.According to the adjustment distance, casing damage closure is adjusted
The position of tool, the upper surface for the first packer for making casing capping tools include are located above the damage location of casing, and first
The lower end surface of packer is located at below the damage location of described sleeve pipe.
In order to be accurately determined the position of school depth pipe nipple, the second oil pipe section includes at least two oil pipes, two oil pipes
Length range is 17~20m.
In addition, in embodiments of the present invention, using natural gamma school depth measuring technology, determining that casing capping tools include
The method of the position of school depth pipe nipple can refer to the relevant technologies, and the embodiment of the present invention is to this without elaborating.
Optionally, according to adjustment distance, the position of the casing damage capping tools is adjusted, the upper surface of the first packer is made
Above the damage location of casing and the lower end surface of the first packer is located at after the damage location lower section of the casing, can
To make the upper surface of the first packer be located at the broken of casing for the distance of casing damage capping tools adjustment 1~1.5m range
Within the scope of the preset length of the 1~1.5m and lower end surface of the first packer is located at below the damage location of casing above damage position
Within the scope of the preset length of 1~1.5m, it is ensured that the first packer can block the damage location completely, to work as to second envelope
When the annular region formed in device and casing is poured water, the first packer be may be dipped in the water of the annular region, make first
The damage location of the casing is blocked after packer water-swellable, effectively realizes casing damage closure, and then effectively prevent shallow-layer
Water is flowed into oil well by the damage location in casing, is caused oil well oil liquid water content to rise, is reduced oil recovery efficiency.
Further, in adjustment casing damage capping tools, it is located at the first packer after the damage location in casing,
It also needs to carry out following four operating procedure, the oil recovery for being just able to achieve the casing damage capping tools blocks function, it may be assumed that
Operating procedure one: connecting the casing damage capping tools in pithead position installation well mouth hanger, to hang on well head big
It is fixed in four-way, effectively prevents the movement of the casing damage capping tools position.
Further, since casing damage capping tools are hydro-expansive rubber, which can not receive in water bath
Contracting, therefore when packer has needed casing out, the frictional force of packer rubber and internal surface of sleeve pipe is very big, therefore of the invention real
It applies in example, the casing damage length that casing damage capping tools can block is determined as 1~2m.
Operating procedure two: clear water is pumped into well, the displacement control of clear water exists by sleeve gate on ground using pump truck
30~40m3/ h makes liquid level be located at well head.
Operating procedure three: the tripping in oil pumping bar assembly in oil pipe, oil pumping bar assembly includes that sucker rod is connected with sucker rod
Oil pump plunger piston.
Operating procedure four: sucker rod is connect by polished rod eye with pumping unit, and closing well 7 days, the casing can be realized
The oil recovery of damaged capping tools blocks function.
In embodiments of the present invention, using turbine flow logging technique, the depth of damage location in casing is determined, according to this
The depth of casing damage position is adjusted the position of casing capping tools, blocks casing using natural gamma school depth measuring technology
The first packer that tool includes is located at the damage location of casing, and after pouring into water in casing, it is swollen that the first packer meets water
After swollen, the damage location of casing can be blocked, the closure of casing damage is effectively realized, so that shallow seated groundwater effectively be prevented to flow into oil
In well, and the oil liquid in oil well is prevented to flow into shallow-layer by the damage location in casing, reduces oil liquid in oil well
Water content, and then improve oil recovery efficiency.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Those of ordinary skill in the art will appreciate that realizing that all or part of the steps of above-described embodiment can pass through hardware
It completes, relevant hardware can also be instructed to complete by program, the program can store in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of casing damage capping tools, which is characterized in that the capping tools include: the first packer, the second packer,
Oil pipe and school depth pipe nipple；
The school depth pipe nipple, first packer and second packer are serially connected in from top to bottom on the oil pipe, described
First packer is located at the damage location in casing, and the damage location of described sleeve pipe can be blocked after water-swellable, and described
Two packers are used to provide water environment for first packer.
2. capping tools as described in claim 1, which is characterized in that first packer is to meet water packer.
3. capping tools as described in claim 1, which is characterized in that second packer is cup packer.
4. capping tools as described in claim 1, which is characterized in that the oil pipe includes four oil pipe sections, the first oil pipe section
For the oil pipe connected above the school depth pipe nipple, the second oil pipe section is the oil for connecting the school depth pipe nipple and first packer
Pipe, third oil pipe section are the oil pipe for connecting first packer and second packer, and the 4th oil pipe section is described second
The oil pipe connected below packer.
5. capping tools as claimed in claim 4, which is characterized in that the length of the second oil pipe section is the first default length
Degree.
6. capping tools as claimed in claim 5, which is characterized in that the range of first preset length is 17~20m.
7. a kind of casing damage method for blocking, which is characterized in that the method uses the claims 1-6 any claim
The casing damage capping tools, the method for blocking include:
Using turbine flow measuring technology, the depth of damage location in casing is determined；
Using natural gamma school depth measuring technology, the depth of casing damage capping tools lieutenant colonel's depth pipe nipple position, the school are determined
The position of deep pipe nipple is the position of the school depth pipe nipple upper surface；
According to the depth for the school depth pipe nipple position that the natural gamma school depth measuring technology determines, described sleeve pipe capping tools are adjusted
Position, the upper surface for the first packer for making described sleeve pipe capping tools include is located above the damage location of described sleeve pipe,
The lower end surface of first packer is located at below the damage location of described sleeve pipe.
8. method for blocking as claimed in claim 7, which is characterized in that described true according to the natural gamma school depth measuring technology
The depth of fixed school depth pipe nipple position adjusts the position of described sleeve pipe capping tools, make that described sleeve pipe capping tools include the
The upper surface of one packer is located above the damage location of described sleeve pipe, and the lower end surface of first packer is located at described sleeve pipe
Damage location below, comprising:
According to the depth of damage location in described sleeve pipe, the depth of the school depth pipe nipple position, the length of the school depth pipe nipple and
First preset length determines that adjustment distance, first preset length are the school depth pipe nipple lower end surface and first packing
Length between device upper surface；
According to the adjustment distance, position of the described sleeve pipe capping tools in described sleeve pipe is adjusted, the first envelope adjusted is made
At preset length range above the damage location that the upper surface of device is located at described sleeve pipe, and make described adjusted first
The lower end surface of packer is located at the preset length range below the damage location of described sleeve pipe.
9. method for blocking as claimed in claim 8, which is characterized in that the preset length range is 1~1.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510437156.0A CN106368638B (en) | 2015-07-23 | 2015-07-23 | casing damage plugging tool and plugging method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510437156.0A CN106368638B (en) | 2015-07-23 | 2015-07-23 | casing damage plugging tool and plugging method |
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| CN106368638A CN106368638A (en) | 2017-02-01 |
| CN106368638B true CN106368638B (en) | 2019-04-09 |
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| CN201510437156.0A Active CN106368638B (en) | 2015-07-23 | 2015-07-23 | casing damage plugging tool and plugging method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110486538A (en) * | 2019-08-28 | 2019-11-22 | 中国一冶集团有限公司 | A kind of service sleeve connect plugging structure and method for blocking with pipeline |
| CN114320202B (en) * | 2022-01-08 | 2022-07-01 | 江苏省地质调查研究院 | Well repairing device and well repairing method |
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