CN106884625A - It is a kind of to administer the method altered on oil-water well oil layer sleeve pipe - Google Patents
It is a kind of to administer the method altered on oil-water well oil layer sleeve pipe Download PDFInfo
- Publication number
- CN106884625A CN106884625A CN201510934282.7A CN201510934282A CN106884625A CN 106884625 A CN106884625 A CN 106884625A CN 201510934282 A CN201510934282 A CN 201510934282A CN 106884625 A CN106884625 A CN 106884625A
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- Prior art keywords
- oil
- production string
- pipe
- string
- water well
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
Abstract
The invention discloses a kind of method administered and altered on oil-water well oil layer sleeve pipe, belong to oil-water well oil recovery field.The method includes：Act the flow string in oil-water well, scraping process are carried out to production string, construction section in production string is insulated with setting of casing with the sealing tubing string with packer.Height will be altered on oil-water well well head production string and is designated as X meters, the car button bit that the position at X meters of production string top is reset to production string is put；The height of casing-pipe cutting machine is designated as Y meters, the surface pipe in the range of following Y meters is put using casing-pipe cutting machine excision car button bit, then excision car button bit puts the production string of the above, re-works casing threads, then seals production string and the annular space between surface pipe and production string.Deblocking packer, the production string of well head is retightened, the resection length of record surface pipe and production string, rises to seal tubing string.The method is good to the regulation effect altered on oil-water well oil layer sleeve pipe, and the term of validity is long.
Description
Technical field
It is more particularly to a kind of to administer the side altered on oil-water well oil layer sleeve pipe the present invention relates to oil-water well oil recovery field
Method.
Background technology
With deepening continuously for oil field development, part oil-water well is influenceed by ground settlement, production string performance
Go out on different degrees of and alter, highly from several centimeters to tens centimeters, severe patient causes pumping unit of well to hang
Rope device collides with wellhead packing box；Break or drawing crack well head surface pipe and production procedure；For a long time with oil pumping
Machine pumps, and easily causes production string fatigue fracture；Nearby sucker rod partial wear breaks de- etc. to well head,
The serious exploitation that have impact on oil field of problem is altered on sleeve pipe, and normally production has been buried seriously to follow-up oil-water well
Potential safety hazard.So, there is provided a kind of method altered on oil-water well oil layer sleeve pipe of administering is necessary.
The method altered on the improvement oil-water well oil layer sleeve pipe that prior art is provided, such as directly welding or angle iron weldering
The fixing means for connecing, alters on production string and the method that multilayer loop shape steel plate is welded and fixed is encased inside in space, from
And righting and reinforcing production string, prevent well head from pumping and cause production string fatigue fracture, eliminate
Well head rocks the potential safety hazard equivalent risk of the job execution process brought, and recovers the normal production of oil-water well.
Inventor has found that prior art at least has following technical problem：
The method to being altered on improvement oil-water well oil layer sleeve pipe that prior art is provided, may be only available for production string
On alter situation of the distance less than 20cm, and well head production string can only be reinforced.But because surface subsidence gives oil reservoir set
The effect of the huge upper top power that pipe reversely applies, occurs in that the problem of reinforcement tools and production string Rewelding,
Such method prevents the term of validity altered on production string shorter, and Rewelding is also easily produced to production string body
It is raw to damage, waste time and energy.
The content of the invention
The technical problems to be solved by the invention are, there is provided alter that effect is good and the term of validity is long on one kind is anti-
Improvement oil-water well oil layer sleeve pipe on the method altered, concrete technical scheme is as follows：
A kind of method administered and altered on oil-water well oil layer sleeve pipe is the embodiment of the invention provides, the method includes：
Act the flow string in oil-water well, production string is pre-processed, pre-treatment is carried out to oil-water well, so
Surface pipe and production string are cut afterwards, and finally oil-water well is post-processed.
It is described pretreatment is carried out to production string to include：With casing scraper to 10m below the oil-water well well head
In the range of the production string inwall carry out scraping, to remove the dirt of the production string inwall.
It is described pre-treatment is carried out to oil-water well to include：Enter to carry under in the production string after pretreatment
The sealing tubing string of packer, makes the packer be stuck in precalculated position, and carry out setting.Then to positioned at institute
State the production string on packer top, and noted in annular space between the production string and surface pipe
Water.Finally the oil-water well well head fuel gas is detected, after detection is qualified, in the oil-water well well
Working pit is dug out around mouthful, the pre-treatment of the oil-water well is completed.The precalculated position be production string in,
Apart from the optional position of below the production string top 3m.
The cutting surface pipe and production string include：Height note will be altered on oil-water well well head production string
It is X meters, the position at described production string top X meters is reset to the car of the production string
Button bit is put；The height of casing-pipe cutting machine is designated as Y meters, the car button bit is cut off using described sleeve pipe cutting machine
Put place it is following Y meters in the range of the surface pipe, then cut off the oil reservoir that the car button bit puts the above
Sleeve pipe.
It is described post processing is carried out to oil-water well to include：Put in the car button bit of the production string for resetting
Processing casing threads, to the annular space between the production string and the surface pipe and the production string
Sealed, then unsealed the packer, then the production string of the well head is retightened.Most postscript
The resection length of the surface pipe and the production string is recorded, recovers the oil-water well well head landforms, rise
The sealing tubing string.
Specifically, preferably, described sleeve pipe scraper also becomes buckle joint and the first tubing round thread by oil pipe
Connect, and first oil pipe, the oil pipe become buckle joint, described sleeve pipe scraper and sequentially arrange from top to bottom
Cloth, drives described sleeve pipe scraper to be moved up and down in the production string by first oil pipe.
Specifically, preferably, the sealing tubing string also includes：Second oil pipe, plug valve, the 3rd oil pipe,
Horn mouth.Second oil pipe, the plug valve, the packer, the 3rd oil pipe, the loudspeaker
Mouth is sequentially connected from top to bottom, and the 3rd tubing length is 310-480m, and the plug valve is in closes shape
State.Before the packer is stuck in the precalculated position, the sealing tubing string is recorded in the precalculated position
Tubing string suspending weight.
Specifically, preferably, it is described it is setting including：The sealing tubing string 1.2-1.6m is above carried, then slowly
Put down, the pressure of 30-80KN is applied on the sealing tubing string, complete described setting, and by described second
Oil pipe back-off takes out.
Specifically, preferably, the working pit is centered on the surface pipe, excavating radius is 1-1.5m,
Depth is from the downward 0.7-1.5m of oil-water well well head doughnut-shaped steel plate.
Specifically, preferably, being arranged on the surface pipe and described by by the adjustable lifter of sleeve pipe
At annular space between production string, and make the production string after cutting from bottom to top successively with casing coupling,
Pipe nipple and the threaded connection of wellhead tree tree are raised, with to the production string and the surface pipe and oil reservoir
Annular space between sleeve pipe is sealed.
Specifically, include preferably, unsealing the packer：Under enter second oil pipe, make described
Two oil pipes are connected with the plug valve, the sealing tubing string are above carried by second oil pipe, until described close
The suspending weight of sealing pipe column is preceding equal with setting, and the removing seal for packer is finished.
Specifically, preferably, by the production string of the well head retighten including：Lift sleeve pipe short
Section is connected by flange with big four, controls the lifting load of the production string for 80-150kN, completes institute
After stating the lifting of production string, make the lifting load on of the production string in the adjustable rising of described sleeve pipe
On device, retightening for the production string is completed.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
It is provided in an embodiment of the present invention to administer the method altered on oil-water well oil layer sleeve pipe, go out in oil-water well by
Flow string, and scraping process are carried out to production string, the dirt of production string inwall is removed, after being easy to
Continuous operation.By using packer to being insulated below production string construction section, and by construction section oil
Water filling in layer sleeve pipe, makes the production string below construction section separate with the production string of construction section, it is to avoid profit
The gas permeation of well underground causes danger, so that the governance process altered on oil-water well oil layer sleeve pipe is safer.
According to the height that height and casing-pipe cutting machine are altered on production string, the cutting of setting surface pipe and production string
Position, the surface pipe and production string for altering part are cut off by casing-pipe cutting machine, and by after dicing
Production string on re-work screw thread, make the extracting device of oil such as production string and wellhead tree tree reconnect,
The wellhead assembly rising or deflection altered and cause have been inherently eliminated on production string, oil-water well well head has been eliminated
Potential safety hazard, it is ensured that the normal production of oil-water well.By the resection length to surface pipe and production string
Recorded, it is ensured that oil-water well basic data it is complete, to the production and exploitation of oil-water well after being easy to.Can
See, provided in an embodiment of the present invention to administer the method altered on oil-water well oil layer sleeve pipe, regulation effect is good, effectively
Phase is long, and safe operation, is easy to large-scale promotion application.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below will be to embodiment of the present invention
It is described in further detail.
The embodiment of the invention provides it is a kind of administer the method altered on oil-water well oil layer sleeve pipe, the method include with
Lower step：Act the flow string in oil-water well, production string is pre-processed, before being carried out to oil-water well
Treatment, then cuts surface pipe and production string, and finally oil-water well is post-processed.
Carrying out pretreatment to production string includes：With casing scraper to 10m below oil-water well well head in the range of
Production string inwall carry out scraping, to remove the dirt of production string inwall.
Carrying out pre-treatment to oil-water well includes：Enter with packer under in production string after pretreatment
Sealing tubing string, makes packer be stuck in precalculated position, and carry out setting.Then to the oil positioned at packer top
Water filling in annular space of the layer between sleeve pipe, and production string and surface pipe.It is finally flammable to oil-water well well head
Gas is detected, after detection is qualified, working pit is dug out around oil-water well well head, before completing oil-water well
Treatment.Precalculated position is the optional position below the 3m of production string top in production string.
Cutting surface pipe and production string include：Height will be altered on oil-water well well head production string and is designated as X
Rice, the car button bit that the position at X meters of production string top is reset to production string is put；Will set
The height of tube cutting machine is designated as Y meters, is put using casing-pipe cutting machine excision car button bit and located in the range of following Y meters
Surface pipe, then cuts off the production string that car button bit puts the above.
Carrying out post processing to oil-water well includes：Put in the car button bit of the production string for resetting and process sleeve pipe
Screw thread, seals to the annular space between production string and production string and surface pipe, then deblocking packing
Device, then the production string of well head is retightened.The resection length of surface pipe and production string is finally recorded,
Recover oil-water well well head landforms, rise to seal tubing string.
It is provided in an embodiment of the present invention to administer the method altered on oil-water well oil layer sleeve pipe, go out in oil-water well by
Flow string, and scraping process are carried out to production string, the dirt of production string inwall is removed, after being easy to
Continuous operation.By using packer to being insulated below production string construction section, and by production string
Middle water filling, makes the production string below construction section separate with the production string of construction section, it is to avoid oil-water well underground
Gas permeation cause danger so that the governance process altered on oil-water well oil layer sleeve pipe is safer.According to
The cutting position of the height of height and casing-pipe cutting machine, setting surface pipe and production string is altered on production string,
The surface pipe and production string for altering part are cut off by casing-pipe cutting machine, and by oil reservoir after dicing
Screw thread is re-worked on sleeve pipe, makes the extracting device of oil such as production string and wellhead tree tree reconnect, from basic
On eliminate and the wellhead assembly that causes is altered on production string raise or deflection, eliminate the safety of oil-water well well head
Hidden danger, it is ensured that the normal production of oil-water well.Remembered by the resection length to surface pipe and production string
Record, it is ensured that oil-water well basic data it is complete, to the production and exploitation of oil-water well after being easy to.It can be seen that, this
The method altered on the improvement oil-water well oil layer sleeve pipe that inventive embodiments are provided, regulation effect is good, and the term of validity is long,
And safe operation, it is easy to large-scale promotion application.
Wherein, flow string includes oil pipe, sucker rod and oil well pump, and flow string is gone out from oil-water well
Production string is cut again afterwards, in case flow string is impacted to work progress, while facilitating oil reservoir
The cutting construction of sleeve pipe.
A time scraping is carried out to the production string inwall in the range of 10m below oil-water well well head with casing scraper,
And in the range of the upper and lower 5m of set position, scraping 3 times repeatedly, to remove dirt, the wax of production string inwall
And other obturators, it is easy to the setting of packer.Wherein, casing scraper can select GX-T140 types.
Casing scraper also becomes buckle joint and is connected with the first tubing round thread by oil pipe, and the first oil pipe, oil pipe variable buckle
Joint, casing scraper are sequentially arranged from top to bottom, forming sleeves scraping tubing string.Driven by the first oil pipe
Casing scraper moves up and down in production string, to realize the cleaning to production string.After scraping, rise
Scraping tubing string.
Specifically, sealing tubing string also includes：Second oil pipe, plug valve, the 3rd oil pipe, horn mouth.Second
Oil pipe, plug valve, packer, the 3rd oil pipe, horn mouth are sequentially connected from top to bottom, wherein, packer
Y211-114 types may be selected, the second oil pipe and the 3rd oil pipe are the external upset tubing of a diameter of 73mm, the
Three tubing lengths are 310-480m.The effect of the second oil pipe is, by sealing tubing string feeding production string, to treat close
Packer set in sealing pipe column is finished, and can be taken out the second oil pipe back-off, to facilitate subsequent job.3rd
The effect of oil pipe is to produce lower pulling force to packer, is conducive to packer set, improves packer packing oil removal
The sealing effectiveness of layer sleeve pipe, reaches safe construction.Plug valve is constantly in closed mode so that plug valve with
Under seal pipe column sealing.Before packer is stuck in precalculated position, record sealing tubing string is in precalculated position
Tubing string suspending weight, the pressure applied on sealing tubing string during in order to controlling setting.The physical location of packer should
In the range of ± the 1m of precalculated position, and the box cupling of adjacent production string should be avoided, so that packer is accurate, tight
It is thickly setting.Packer and plug valve collective effect, seal whole production string, prevent below construction section
Oil gas is revealed, it is ensured that site operation safety.
Specifically, setting procedure includes：Sealing tubing string 1.2-1.6m is above carried by the second oil pipe, is then slowly put
Under, measured by the suspending weight for sealing tubing string, when the suspending weight of sealing tubing string is than measuring in precalculated position
When tubing string hangs light 30-80KN, illustrate to seal the pressure for having applied 30-80KN on tubing string, it is now, setting complete
Into, and the second oil pipe back-off is taken out.
In order to further ensure that the strict sealing of the production string below construction section, poured into clearly from well head big four
Water, clear water liquid level should not be greater than car button bit and put, in order to avoid there is water to overflow in cutting process, clear water pours into speed
Control is in 2-5m3/h.Then, to pouring into clear water, clear water liquid in the annular space between surface pipe and production string
Face also should not be greater than car button bit and put, and clear water pours into speed control in 10-30m3/ h, in order to avoid pour water too fast causing
Clear water spillage oil well mouth, influence construction.After pouring into clear water, clear water liquid level is in 30min in production string
It is not decreased obviously, illustrates that packer set is tight, while by clear water in the following production string of construction section
Sealed.
After completing setting and water-pouring process, with combustible gas monitoring alarm to the production string of profit well head,
The fuel gas in annular space between surface pipe and production string is detected, flammable with petrochemical enterprise
Gas and toxic gas detection alarm design specification are specific to perform standard GB 50493-2009 as examination criteria.
After detection is qualified, next step construction can be carried out, if detection is unqualified, should re-started setting.
Then, working pit is dug out around oil-water well well head.First remove wellhead tree tree, sleeve pipe and raise pipe nipple
And first casing coupling, then centered on surface pipe, radius is dug out for 1-1.5m, depth is from oil
The cylindrical work hole of the downward 0.7-1.5m of well well head doughnut-shaped steel plate, convenient working.
Specifically, the surface pipe located in the range of following Y meters is put using casing-pipe cutting machine excision car button bit, with
The convenient installation set tube cutting machine on production string, and production string is cut.The height of casing-pipe cutting machine
Degree is generally 0.7m, so, the Cutting Length of surface pipe is not less than 0.7m.To surface pipe and oil reservoir set
After pipe is cut, specific Cutting Length need to be write down, to ensure that oil-water well basic data is completed.Then, press
According to casing threads standard, i.e. GB/T 9253.2-1999, using casing threads processing machine (vertical) to oil reservoir set
Pipe re-works screw thread, so that the production string after cutting can be connected with wellhead installation.
Then, be arranged on production string by by the adjustable lifter of sleeve pipe, be used to seal surface pipe and
Annular space between production string, and make the production string after cutting from bottom to top successively with casing coupling, raise
Pipe nipple and wellhead tree tree are threadedly coupled, with to the annular space between production string and production string and surface pipe
Sealed.Wherein, the effect of adjustable lifter is to the annular space section between production string and surface pipe
Sealed, it is provided by Renqiu City Ke Feng oil fields science service Co., Ltd, the patent No.：ZL20112
0447665.9。
Specifically, deblocking packer includes：Pull down wellhead tree tree more than big four, under enter the second oil pipe,
The second oil pipe is set to be connected with plug valve make-up, the second oil pipe above carries sealing tubing string 0.2-0.6m, records tubing string suspending weight,
Sealing tubing string is carried in continuation, until the suspending weight for sealing tubing string return to it is setting before suspending weight, removing seal for packer is complete
Finish.Meanwhile, sealing tubing string is connected with tubing hanger, and seat holds out against well head jackscrew in well head big four,
Specifically, by the production string of well head retighten including：Pipe nipple is lifted in big four upper joint sleeve pipe,
Make sleeve pipe lift pipe nipple to be connected with big four by flange, lift production string；Control the lifting of production string
Load is 80-150kN (under empty wellbore conditions), after completing the lifting of production string, makes the lifting of production string
Load on completes retightening for well head production string on the adjustable lifter of sleeve pipe.
Finally, according to surface pipe and the resection length of production string, the oil in adjustment oil-water well basic data
Layer casing length, surface pipe length, link and repairing data, and achieve preservation.Rise to seal tubing string,
Complete the governance process altered on oil-water well oil layer sleeve pipe.
To be below described in detail by specific embodiment：
Embodiment 1
Present embodiments provide in a kind of well to Z61-6X and alter the method administered on production string, specific step
It is rapid as follows：
Step 1：The pretreatment of production string
The flow string in producing well is played, the precalculated position that will seal packer in tubing string is set to away from oil reservoir set
At the 5m of pipe top, in the down-hole casing under enter scraping tubing string, in scraping tubing string, the first oil pipe, oil pipe variable buckle
Joint, GX-T140 casing scrapers are sequentially threadedly coupled from top to bottom.Sleeve pipe is driven to scrape by the first oil pipe
Cut device to be moved up and down in production string, a scraping is carried out to the internal surface of sleeve pipe of 10m well sections below well head, it is right
The setting upper and lower 5m of well section scraping 3 times repeatedly, remove dirt, wax and the resistance of other internal surface of sleeve pipe of down-hole casing inwall
Plug thing.After scraping is finished, act scraping tubing string.
Step 2：Oil-water well pre-treatment
To in production string after pretreatment, (the well surface pipe external diameter is D339.73mm, and internal diameter is
d320.4mm；Production string external diameter be D139.7mm, internal diameter is d124.3mm) under enter with packer
Sealing tubing string, in sealing tubing string, the second oil pipe, plug valve, Y211-114 packers, the 3rd oil pipe, loudspeaker
Mouth is sequentially threadedly coupled from top to bottom, and the length 525m of the 3rd oil pipe, plug valve is closed.It is close
Packer is to record tubing string suspending weight 50KN after production string depth location 5m in sealing pipe column, and is adjusted herein
Packer stuck point, is ready for setting.
Sealing tubing string is above carried into 1.3m, then slow decentralization, to sealing tubing string pressurization 50KN；Packer seat
Back-off takes out the second oil pipe after sealing lattice.
Clear water is pumped into packer above production string is filled from well head big four, pours into the speed of clear water
It is 2m3/h.Liquid level 30min in observation production string, liquid level is unchanged, and packer sealing is tight.To top layer
Annular space between sleeve pipe and production string pumps into clear water, untill filling；The speed for pumping into clear water is 25m3/h。
With combustible gas monitoring alarm to the production string of profit well head, between surface pipe and production string
Annular space in fuel gas detected, alarmed with petrochemical enterprise fuel gas and toxic gas detection
Used as examination criteria, specific to perform standard GB 50493-2009, testing result is zero to design specification, and detection is closed
Lattice.
Remove wellhead tree tree, sleeve pipe and raise pipe nipple and first production string box cupling.With well head surface pipe
Centered on, the cylindrical work hole of excavating radius 1m, depth 0.7m below well head doughnut-shaped steel plate.
Step 3：Cutting surface pipe and production string
Determine and height is altered on well head for 50cm, the position at the 50cm of production string top is reset
For the car button bit of production string is put；On the basis of this position, the casing-pipe cutting machine of D339.73mm is installed, cuts
Except the surface pipe in 0.7m depth below this position, the length of the surface pipe of excision is 0.7m.
The casing-pipe cutting machine of D139.7mm is installed on production string, is reset on excision production string
Car button bit puts the production string of the above, and the production string length of excision is 0.5m.
Step 4：Oil-water well is post-processed
Casing threads processing machine (vertical) is installed on D139.7mm production strings, mark is performed according to casing threads
Quasi- GB/T 9253.2-1999, re-work casing threads.
Installed by Renqiu City between table set (internal diameter is d320.4mm) and oil jacket (external diameter is D139.7mm) annular space
Adjustable lifter (the patent No. of sleeve pipe that Ke Feng oil fields science service Co., Ltd provides：ZL20112
0447665.9), sealed with to the annular space between production string and surface pipe；And make the oil reservoir after cutting
Sleeve pipe is threadedly coupled with casing coupling, rising pipe nipple and wellhead tree tree successively from bottom to top, with to oil reservoir set
Pipe is sealed.
Tear wellhead tree tree more than big four open, under enter the second oil pipe, make the second oil pipe with plug valve make-up phase
Connect, meanwhile, sealing tubing string is connected with tubing hanger, and seat holds out against well head jackscrew in well head big four, leads to
Cross the second oil pipe and above carry sealing tubing string upper lifting pipe post 0.3m, record tubing string suspending weight 60KN；Continue upper lifting pipe post,
Tubing string suspending weight returns to 50KN, removing seal for packer.
After sealing tubing string deblocking, pipe nipple is lifted in big four upper joint sleeve pipe, sleeve pipe is lifted pipe nipple and pass through method
Orchid is connected with big four, lifts production string；It is 200KN (including in well to control the lifting load of production string
The weight 50KN of oil pipe column) after, the adjustable lifter of sleeve pipe is adjusted to adjacent production string box cupling lower surface,
Lay down production string lifting load, production string box cupling seat in the adjustable lifter upper surface of sleeve pipe, lifting
Production string load on the adjustable lifter of sleeve pipe, fix and finish by well head production string；
After production string is fixed, well head working pit is backfilled, recover well head landforms；Appraise and decide the table that well head has cut off
The length 0.5m of layer casing length 0.7m and production string, the length of surface pipe and production string according to excision
Degree, table set length in adjustment Z61-6X well basic datas, link and oil mend away from data, and achieve preservation
(table set length 147.56m before drop set, links 4.92m, and oil is mended away from 4.35m；Table set length 146.86m after drop set,
5.42m is linked, oil is mended away from 4.85m).
Finally, rise and oil-water well interior sealing tubing string, complete the improvement to being altered on Z61-6X well production strings.
The pumping unit hanging rope for causing is altered on Z61-6X well production strings collide with well by after above-mentioned improvement, eliminating
Mouthful packing box, the problems such as job execution production wellhead is rocked, recovers the normal production of the well.By the end of current
The term of validity is more than 200 days and regulation effect continuous and effective.
Embodiment 2
Present embodiments provide in a kind of well to J45-210 and alter the method administered on production string, specific step
It is rapid as follows：
Step 1：The pretreatment of production string
The flow string in producing well is played, sealing tubing string packer precalculated position is set to away from production string top
End 5m places, in the down-hole casing under enter scraping tubing string, in scraping tubing string, the first oil pipe, oil pipe change buckle joint,
GX-T140 casing scrapers are sequentially threadedly coupled from top to bottom.Casing scraper is driven to exist by the first oil pipe
Moved up and down in production string, a scraping is carried out to the internal surface of sleeve pipe of 10m well sections below well head, to setting well
Section 5m scraping 3 times repeatedly up and down, remove dirt, wax and other internal surface of sleeve pipe obturators of down-hole casing inwall.
After scraping is finished, act scraping tubing string.
Step 2：Oil-water well pre-treatment
To in production string after pretreatment, (the well surface pipe external diameter is D339.73mm, and internal diameter is
d305mm；Production string external diameter be D139.7mm, internal diameter is d124.3mm) under enter with the close of packer
Sealing pipe column, in sealing tubing string, the second oil pipe, plug valve, Y211-114 packers, the 3rd oil pipe, loudspeaker
Mouth is sequentially threadedly coupled from top to bottom, and the length 522m of the 3rd oil pipe, plug valve is closed.Sealing
Packer is to record tubing string suspending weight 50KN after production string depth location 5m in tubing string, and is sealed in adjustment herein
Every device stuck point, it is ready for setting.
Sealing tubing string is above carried into 1.3m, then slow decentralization, to sealing tubing string pressurization 50KN；Packer seat
Back-off takes out the second oil pipe after sealing lattice.
Clear water is pumped into packer above production string is filled from well head big four, pours into the speed of clear water
It is 1.5m3/h.Liquid level 30min in observation production string, liquid level is unchanged, and packer sealing is tight.To table
Annular space between layer sleeve pipe and production string pumps into clear water, untill filling；The speed for pumping into clear water is
28m3/h。
With combustible gas monitoring alarm to the production string of profit well head, between surface pipe and production string
Annular space in fuel gas detected, alarmed with petrochemical enterprise fuel gas and toxic gas detection
Used as examination criteria, specific to perform standard GB 50493-2009, testing result is zero to design specification, and detection is closed
Lattice.
Remove wellhead tree tree, sleeve pipe and raise pipe nipple and first production string box cupling.With well head surface pipe
Centered on, the cylindrical work hole of excavating radius 1.3m, depth 1.2m below well head doughnut-shaped steel plate.
Step 3：Cutting surface pipe and production string
Determine and height is altered on well head for 35cm, the position at the 35cm of production string top is reset
For the car button bit of production string is put；On the basis of this position, the casing-pipe cutting machine of D339.73mm is installed, cuts
Except the surface pipe in 0.7m depth below this position, the length of the surface pipe of excision is 0.7m.
The casing-pipe cutting machine of D139.7mm is installed on production string, is reset on excision production string
Car button bit puts the production string of the above, and the production string length of excision is 0.35m.
Step 4：Oil-water well is post-processed
Casing threads processing machine (vertical) is installed on D139.7mm production strings, mark is performed according to casing threads
Quasi- GB/T 9253.2-1999, re-work casing threads.
Installed by Renqiu City between table set (internal diameter is d305mm) and oil jacket (external diameter is D139.7mm) annular space
Adjustable lifter (the patent No. of sleeve pipe that Ke Feng oil fields science service Co., Ltd provides：ZL20112
0447665.9), sealed with to the annular space between production string and surface pipe；And make the oil reservoir after cutting
Sleeve pipe is threadedly coupled with casing coupling, rising pipe nipple and wellhead tree tree successively from bottom to top, with to oil reservoir set
Pipe is sealed.
Tear wellhead tree tree more than big four open, under enter the second oil pipe, make the second oil pipe with plug valve make-up phase
Connect, meanwhile, sealing tubing string is connected with tubing hanger, and seat holds out against well head jackscrew in well head big four, leads to
Cross the second oil pipe and above carry sealing tubing string upper lifting pipe post 0.3m, record tubing string suspending weight 65KN；Continue upper lifting pipe post,
Tubing string suspending weight returns to 50KN, removing seal for packer.
After sealing tubing string deblocking, pipe nipple is lifted in big four upper joint sleeve pipe, sleeve pipe is lifted pipe nipple and pass through method
Orchid is connected with big four, lifts production string；It is 160KN (including in well to control the lifting load of production string
The weight 50KN of oil pipe column) after, the adjustable lifter of sleeve pipe is adjusted to adjacent production string box cupling lower surface,
Lay down production string lifting load, production string box cupling seat in the adjustable lifter upper surface of sleeve pipe, lifting
Production string load on the adjustable lifter of sleeve pipe, fix and finish by well head production string；
After production string is fixed, well head working pit is backfilled, recover well head landforms；Appraise and decide the table that well head has cut off
The length 0.35m of layer casing length 0.7m and production string, according to the surface pipe and production string for cutting off
Length, table set length in adjustment J45-210 well basic datas, link and oil mend away from data, and achieve guarantor
Deposit and (drop table set length 117.69m before set, link 3.48m, oil benefit is away from 2.76m；Table set length 118.39m after drop set,
3.83m is linked, oil is mended away from 3.31m).
Finally, rise and oil-water well interior sealing tubing string, complete the improvement to being altered on J45-210 well production strings.
200 meters of wells below the well head for causing are altered on J45-210 well production strings by after above-mentioned improvement, eliminating
Sucker rod partial wear in section, job execution production wellhead is rocked, and wellhead casing pipe Rewelding is fixed and damages sleeve pipe etc.
Problem, recovers the normal production of the well.By the end of the current term of validity was more than 480 days and regulation effect persistently has
Effect.
Presently preferred embodiments of the present invention is the foregoing is only, the protection domain being not intended to limit the invention is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc., all should include
Within protection scope of the present invention.
Claims (8)
1. a kind of method altered on improvement oil-water well oil layer sleeve pipe, including：Act the flow string in oil-water well,
Production string is pre-processed, pre-treatment is carried out to oil-water well, then cut surface pipe and production string,
Finally oil-water well is post-processed；
It is described pretreatment is carried out to production string to include：With casing scraper to 10m below the oil-water well well head
In the range of the production string inwall carry out scraping, to remove the dirt of the production string inwall；
It is described pre-treatment is carried out to oil-water well to include：Enter to carry under in the production string after pretreatment
The sealing tubing string of packer, makes the packer be stuck in precalculated position, and carry out it is setting, then to positioned at institute
State the production string on packer top, and noted in annular space between the production string and surface pipe
Water, finally detects to the oil-water well well head fuel gas, after detection is qualified, in the oil-water well well
Working pit is dug out around mouthful, the pre-treatment of the oil-water well is completed；The precalculated position be production string in,
Apart from the optional position of below the production string top 3m；
The cutting surface pipe and production string include：Height note will be altered on oil-water well well head production string
It is X meters, the position at described production string top X meters is reset to the car of the production string
Button bit is put；The height of casing-pipe cutting machine is designated as Y meters, the car button bit is cut off using described sleeve pipe cutting machine
Put place it is following Y meters in the range of the surface pipe, then cut off the oil reservoir that the car button bit puts the above
Sleeve pipe；
It is described post processing is carried out to oil-water well to include：Put in the car button bit of the production string for resetting
Processing casing threads, to the annular space between the production string and the production string and the surface pipe
Sealed, then unsealed the packer, then the production string of the well head is retightened, most postscript
The resection length of the surface pipe and the production string is recorded, recovers the oil-water well well head landforms, rise
The sealing tubing string.
It is 2. according to claim 1 to administer the method altered on oil-water well oil layer sleeve pipe, it is characterised in that
Described sleeve pipe scraper also becomes buckle joint and is connected with the first tubing round thread by oil pipe, and first oil pipe,
The oil pipe becomes buckle joint, described sleeve pipe scraper and sequentially arranges from top to bottom, by the first oil pipe band
Dynamic described sleeve pipe scraper moves up and down in the production string.
It is 3. according to claim 1 to administer the method altered on oil-water well oil layer sleeve pipe, it is characterised in that
The sealing tubing string also includes：Second oil pipe, plug valve, the 3rd oil pipe, horn mouth；
Second oil pipe, the plug valve, the packer, the 3rd oil pipe, the horn mouth are certainly
It is sequentially connected under above, the 3rd tubing length is 310-480m, the plug valve is closed；
Before the packer is stuck in the precalculated position, the sealing tubing string is recorded in the precalculated position
Tubing string suspending weight.
It is 4. according to claim 3 to administer the method altered on oil-water well oil layer sleeve pipe, it is characterised in that
It is described it is setting including：The sealing tubing string 1.2-1.6m is above carried, is then slowly put down, on the sealing tubing string
Apply the pressure of 3-8t, complete described setting, and the second oil pipe back-off is taken out.
It is 5. according to claim 1 to administer the method altered on oil-water well oil layer sleeve pipe, it is characterised in that
Centered on the surface pipe, excavating radius is 1-1.5m to the working pit, and depth is from the oil-water well
The downward 0.7-1.5m of well head doughnut-shaped steel plate.
It is 6. according to claim 1 to administer the method altered on oil-water well oil layer sleeve pipe, it is characterised in that
It is arranged at annular space between the surface pipe and the production string by by the adjustable lifter of sleeve pipe,
And make the production string after cutting from bottom to top successively with casing coupling, raise pipe nipple and wellhead tree tree
Threaded connection, enters with to the annular space between the production string and the production string and the surface pipe
Row sealing.
It is 7. according to claim 1 to administer the method altered on oil-water well oil layer sleeve pipe, it is characterised in that
Unsealing the packer includes：Under enter second oil pipe, second oil pipe is connected with the plug valve,
The sealing tubing string is above carried by second oil pipe, until the suspending weight of the sealing tubing string is preceding equal with setting,
The removing seal for packer is finished.
It is 8. according to claim 6 to administer the method altered on oil-water well oil layer sleeve pipe, it is characterised in that
By the production string of the well head retighten including：Make sleeve pipe lift pipe nipple to be connected with big four by flange,
Control the lifting load of the production string for 80-150kN, after completing the lifting of the production string, make institute
The lifting load on of production string is stated on the adjustable lifter of described sleeve pipe, the production string is completed
Retighten.
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| CN201510934282.7A CN106884625B (en) | 2015-12-15 | 2015-12-15 | A method of it administers on oil-water well oil layer casing and alters |
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| CN201510934282.7A CN106884625B (en) | 2015-12-15 | 2015-12-15 | A method of it administers on oil-water well oil layer casing and alters |
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| CN110725658A (en) * | 2019-10-14 | 2020-01-24 | 中国石油化工股份有限公司 | Radial anchoring inverted-buckling casing taking and replacing device and method |
| CN110725658B (en) * | 2019-10-14 | 2022-05-03 | 中国石油化工股份有限公司 | Radial anchoring inverted-buckling casing taking and replacing device and method |
| CN112681996A (en) * | 2019-10-18 | 2021-04-20 | 中国石油天然气股份有限公司 | Casing leakage repairing method |
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| CN106884625B (en) | 2019-04-09 |
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