CN106884625B - A method of it administers on oil-water well oil layer casing and alters - Google Patents
A method of it administers on oil-water well oil layer casing and alters Download PDFInfo
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- CN106884625B CN106884625B CN201510934282.7A CN201510934282A CN106884625B CN 106884625 B CN106884625 B CN 106884625B CN 201510934282 A CN201510934282 A CN 201510934282A CN 106884625 B CN106884625 B CN 106884625B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 claims abstract description 231
- 238000007789 sealing Methods 0.000 claims abstract description 48
- 238000005520 cutting process Methods 0.000 claims abstract description 38
- 238000007790 scraping Methods 0.000 claims abstract description 25
- 210000002445 nipple Anatomy 0.000 claims description 15
- 244000147058 Derris elliptica Species 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 11
- 238000002203 pretreatment Methods 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 239000002737 fuel gas Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000012805 post-processing Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 14
- 230000006872 improvement Effects 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 9
- 238000002271 resection Methods 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 23
- 239000007789 gas Substances 0.000 description 7
- 239000004519 grease Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 210000000481 breast Anatomy 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 239000002341 toxic gas Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- HJCCZIABCSDUPE-UHFFFAOYSA-N methyl 2-[4-[[4-methyl-6-(1-methylbenzimidazol-2-yl)-2-propylbenzimidazol-1-yl]methyl]phenyl]benzoate Chemical compound CCCC1=NC2=C(C)C=C(C=3N(C4=CC=CC=C4N=3)C)C=C2N1CC(C=C1)=CC=C1C1=CC=CC=C1C(=O)OC HJCCZIABCSDUPE-UHFFFAOYSA-N 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000233855 Orchidaceae Species 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of methods altered on improvement oil-water well oil layer casing, belong to oil-water well oil recovery field.This method comprises: acting the flow string in oil-water well, scraping process is 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 denoted as X meters, and the vehicle button bit that the position at X meters of production string top is reset to production string is set；The height of casing-pipe cutting machine is denoted as Y meters, using casing-pipe cutting machine-cut except vehicle button bit sets the surface pipe in following Y meters of range, then excision vehicle button bit set more than production string, re-work casing threads, then seal the annular space between production string and surface pipe and production string.Deblocking packer retightens the production string of well head, records the resection length of surface pipe and production string, acts sealing tubing string.This method is good to the regulation effect altered on oil-water well oil layer casing, and validity period is long.
Description
Technical field
The present invention relates to oil-water well oil recovery fields, in particular to a kind of to administer the method altered on oil-water well oil layer casing.
Background technique
With deepening continuously for oil field development, part oil-water well is influenced by ground settlement, and production string shows difference
It alters in degree, highly centimeter is differed from several centimeters to tens, serious person causes pumping unit of well polished rod eye to collide with well head packing
Box；It breaks or drawing crack well head surface pipe and production procedure；It pumps for a long time with pumping unit, be easy to cause oil reservoir
Casing fatigue fracture；Sucker rod partial wear breaks de- etc. near well head, and the serious exploitation for affecting oil field of problem is altered on casing, and
It is normally produced to subsequent oil-water well and has buried serious security risk.It is altered on a kind of improvement oil-water well oil layer casing so providing
Method be necessary.
The method altered on the improvement oil-water well oil layer casing that the prior art provides such as directly welds or what angle iron welded consolidates
Determine method, altered on production string and be encased inside the method that multilayer loop shape steel plate is welded and fixed in space, thus righting and reinforcing oil reservoir
Casing prevents well head from pumping and causes production string fatigue fracture, eliminates well head and shakes bring job execution process
The risks such as security risk, restore the normal production of oil-water well.
Inventor has found that the prior art at least has following technical problem:
The prior art provide to the method altered on oil-water well oil layer casing is administered, may be only available for altering on production string away from
The case where from 20cm is less than, and well head production string can only be reinforced.But because surface subsidence reversely apply to production string it is huge
, there is the problem of reinforcement tools and production string Rewelding in the effect of upper top power, and such method prevents to alter on production string
Validity period it is shorter, and Rewelding is also also easy to produce damage to production string ontology, time-consuming and laborious.
Summary of the invention
Technical problem to be solved by the present invention lies in, provide it is a kind of it is anti-on alter the improvement that effect is good and validity period is long
The method altered on oil-water well oil layer casing, specific technical solution are as follows:
The embodiment of the invention provides a kind of methods altered on improvement oil-water well oil layer casing, this method comprises: rising fuel-displaced
Flow string in well, pre-processes production string, carries out pre-treatment to oil-water well, then cuts surface pipe and oil
Layer casing, finally post-processes oil-water well.
It is described to production string carry out pretreatment include: with casing scraper to 10m range below the oil-water well well head
The interior production string inner wall carries out scraping, to remove the dirt of the production string inner wall.
It is described to oil-water well carry out pre-treatment include: into the production string after pretreatment tripping in have packer
Sealing tubing string, so that the packer is stuck in predetermined position, and carry out setting.Then to positioned at described in the packer top
It is filled the water in annular space between production string and the production string and surface pipe.It is finally flammable to the oil-water well well head
Gas is detected, and after detection is qualified, is dug out working pit around the oil-water well well head, is completed the preceding place of the oil-water well
Reason.The predetermined position is in production string, apart from any position below production string top 3m.
The cutting surface pipe and production string include: that will alter height on oil-water well well head production string to be denoted as X meters,
The vehicle button bit that position at described production string top X meters is reset to the production string is set；By casing-pipe cutting
The height of machine is denoted as Y meters, cuts off the vehicle button bit using described sleeve pipe cutting machine and sets the surface layer set sentenced in lower Y meters of range
Pipe, then cuts off the vehicle button bit and sets above production string.
It is described that carry out post-processing to oil-water well include: to set upper processing set in the vehicle button bit of the production string of reset
Pipe screw thread is sealed the annular space between the production string and the surface pipe and the production string, then solves
The packer is sealed, then the production string of the well head is retightened.Finally record the surface pipe and the oil reservoir set
The resection length of pipe restores the oil-water well well head landforms, acts the sealing tubing string.
Specifically, preferably, described sleeve pipe scraper also passes through oil pipe variable buckle connector connect with the first tubing round thread, and
First oil pipe, the oil pipe variable buckle connector, described sleeve pipe scraper are sequentially arranged from top to bottom, pass through first oil pipe
Described sleeve pipe scraper is driven to move up and down in the production string.
Specifically, preferably, the sealing tubing string further include: the second oil pipe, plug valve, third oil pipe, horn mouth.Institute
The second oil pipe, the plug valve, the packer, the third oil pipe, the horn mouth is stated to be sequentially connected from top to bottom, it is described
Third tubing length is 310-480m, and the plug valve is in close state.The packer be stuck in the predetermined position it
Before, the sealing tubing string is recorded in the tubing string suspending weight in the predetermined position.
Specifically, preferably, it is described it is setting include: above to mention the sealing tubing string 1.2-1.6m, then slowly put down,
Apply the pressure of 30-80KN on the sealing tubing string, completion is described setting, and second oil pipe is buckled to and is taken out.
Specifically, preferably, the working pit is centered on the surface pipe, excavating radius 1-1.5m, depth
For from the downward 0.7-1.5m of oil-water well well head doughnut-shaped steel plate.
Specifically, preferably, by the way that the adjustable lifter of casing is mounted on the surface pipe and the oil reservoir set
At annular space between pipe, and make the production string after cutting from bottom to top successively with casing coupling, increase pipe nipple and well head
Production tree is threadedly coupled, to be sealed to the annular space between the production string and the surface pipe and production string.
Specifically, preferably, unsealing the packer includes: the second oil pipe described in tripping in, make second oil pipe with
The plug valve be connected, the sealing tubing string is above mentioned by second oil pipe, until it is described sealing tubing string suspending weight with it is setting
Preceding equal, the removing seal for packer finishes.
Specifically, preferably, it includes: that casing lifting pipe nipple is made to pass through method that the production string of the well head, which is retightened,
Orchid is connected with big four, and the lifting load for controlling the production string is 80-150kN, after the promotion for completing the production string,
Make the lifting load on of the production string on the adjustable lifter of described sleeve pipe, completing the again solid of the production string
It is fixed.
Technical solution provided in an embodiment of the present invention has the benefit that
It is provided in an embodiment of the present invention to administer the method altered on oil-water well oil layer casing, by acting the production in oil-water well
Tubing string, and scraping process is carried out to production string, the dirt of production string inner wall is removed, subsequent job is convenient for.By using envelope
Every device to insulating below production string construction section, and by filling the water into construction section production string, keep construction section below
The production string of production string and construction section separates, and the gas permeation of oil-water well underground is avoided to cause danger, to make oil-water well
The governance process altered on production string is safer.According to the height for altering height and casing-pipe cutting machine on production string, table is set
The cutting position of layer casing and production string, by casing-pipe cutting machine-cut except the surface pipe and production string for above altering part, and
By re-working screw thread on production string after dicing, connect the extracting device of oil such as production string and wellhead oil tree again
It connects, has been inherently eliminated the raising of wellhead assembly caused by altering on production string or deflection, has eliminated the safety of oil-water well well head
Hidden danger guarantees the normal production of oil-water well.It is recorded by the resection length to surface pipe and production string, guarantees grease
Well basic data it is complete, convenient for later to the production of oil-water well and exploitation.As it can be seen that improvement grease provided in an embodiment of the present invention
The method altered on well production string, regulation effect is good, and validity period is long, and safe operation, is convenient for large-scale promotion application.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, embodiment of the present invention will be made into one below
Step ground detailed description.
The embodiment of the invention provides a kind of methods altered on improvement oil-water well oil layer casing, and this method includes following step
It is rapid: to act the flow string in oil-water well, production string is pre-processed, pre-treatment is carried out to oil-water well, then cuts table
Layer casing and production string, finally post-process oil-water well.
Carrying out pretreatment to production string includes: with casing scraper to the oil reservoir within the scope of 10m below oil-water well well head
Internal surface of sleeve pipe carries out scraping, to remove the dirt of production string inner wall.
Carrying out pre-treatment to oil-water well includes: the seal pipe that tripping in has packer into production string after pretreatment
Column makes packer be stuck in predetermined position, and carries out setting.Then to the production string and oil reservoir set for being located at packer top
It is filled the water in annular space between pipe and surface pipe.Finally oil-water well well head fuel gas is detected, after detection is qualified, in oil
Working pit is dug out around well well head, completes the pre-treatment of oil-water well.Predetermined position is in production string, apart from production string top
Hold any position below 3m.
Cutting surface pipe and production string include: that will alter height on oil-water well well head production string to be denoted as X meters, will be away from
The vehicle button bit that position at X meters from production string top is reset to production string is set；The height of casing-pipe cutting machine is denoted as Y
Rice, using casing-pipe cutting machine-cut except vehicle button bit sets the surface pipe sentenced in lower Y meters of range, then excision vehicle button bit is set above
Production string.
Carrying out post-processing to oil-water well includes: to set upper processing casing threads in the vehicle button bit of the production string of reset,
Annular space between production string and production string and surface pipe is sealed, then deblocking packer, then by the oil of well head
Layer casing retightens.The resection length for finally recording surface pipe and production string, restores oil-water well well head landforms, rises close out
Sealing pipe column.
It is provided in an embodiment of the present invention to administer the method altered on oil-water well oil layer casing, by acting the production in oil-water well
Tubing string, and scraping process is carried out to production string, the dirt of production string inner wall is removed, subsequent job is convenient for.By using envelope
Every device to insulating below production string construction section, and by filling the water into production string, make construction section oil reservoir set below
It manages and is separated with the production string of construction section, avoid the gas permeation of oil-water well underground from causing danger, to make oil-water well oil layer set
The governance process altered on pipe is safer.According to the height for altering height and casing-pipe cutting machine on production string, surface pipe is set
With the cutting position of production string, by casing-pipe cutting machine-cut except the surface pipe and production string for above altering part, and by
Screw thread is re-worked on production string after cutting, reconnects the extracting device of oil such as production string and wellhead oil tree, from root
The raising of wellhead assembly caused by altering on production string or deflection are eliminated on this, eliminates the security risk of oil-water well well head, are protected
Demonstrate,prove the normal production of oil-water well.It is recorded by the resection length to surface pipe and production string, guarantees oil-water well basis
Data it is complete, convenient for later to the production of oil-water well and exploitation.As it can be seen that improvement oil-water well oil layer provided in an embodiment of the present invention
The method altered on casing, regulation effect is good, and validity period is long, and safe operation, is convenient for large-scale promotion application.
Wherein, flow string includes oil pipe, sucker rod and oil well pump, by flow string from oil-water well out after again to oil
Layer casing is cut, in order to avoid flow string impacts work progress, while facilitating the cutting construction of production string.
A time scraping carried out to the production string inner wall within the scope of 10m below oil-water well well head with casing scraper, and
Set position up and down within the scope of 5m, be convenient for removing the dirt, wax and other obturators of production string inner wall by scraping 3 times repeatedly
Packer it is setting.Wherein, casing scraper can choose GX-T140 type.Casing scraper also pass through oil pipe variable buckle connector with
The connection of first tubing round thread, and the first oil pipe, oil pipe variable buckle connector, casing scraper are sequentially arranged from top to bottom, forming sleeves
Scraping tubing string.Casing scraper is driven to move up and down in production string by the first oil pipe, to realize to the clear of production string
It is clean.After scraping, act scraping tubing string.
Specifically, tubing string is sealed further include: the second oil pipe, plug valve, third oil pipe, horn mouth.Second oil pipe, cock
Valve, packer, third oil pipe, horn mouth are sequentially connected from top to bottom, wherein Y211-114 type, the second oil may be selected in packer
Pipe and third oil pipe are the external upset tubing that diameter is 73mm, and third tubing length is 310-480m.The effect of second oil pipe
It is that will seal tubing string to be sent into production string, the packer set in tubing string to be sealed finishes, and the second oil pipe can be buckled to and be taken out,
To facilitate subsequent job.The effect of third oil pipe is to generate lower pulling force to packer, is conducive to packer set, improves packing
The sealing effect of device oil-separating layer casing, reaches safe construction.Plug valve is constantly in closed state, so that plug valve is below
Seal pipe column sealing.Before packer is stuck in predetermined position, record sealing tubing string predetermined position tubing string suspending weight, in order to
The pressure applied on sealing tubing string when controlling setting.The physical location of packer should be within the scope of ± the 1m of predetermined position, and answers
The box cupling of adjacent production string is avoided, so that packer is accurate, closely setting.Packer and plug valve collective effect, sealing
Entire production string prevents construction section oil gas leakage below, guarantees site operation safety.
Specifically, setting procedure includes: that sealing tubing string 1.2-1.6m is above mentioned by the second oil pipe, then slowly puts down, leads to
It crosses and the suspending weight of sealing tubing string is measured, when the suspending weight of sealing tubing string hangs light 30-80KN than the tubing string measured in predetermined position
When, illustrate to seal the pressure for having applied 30-80KN on tubing string, at this point, setting completion, and the second oil pipe is buckled to and is taken out.
In order to further ensure that the stringent sealing of construction section production string below, clear water is poured into from well head big four, clearly
Water level should not be greater than vehicle button bit and set, in order to avoid there is water spilling in cutting process, clear water pours into speed control in 2-5m3/h.So
Afterwards, clear water is poured into the annular space between surface pipe and production string, clear water liquid level also should not be greater than vehicle button bit and set, clear water
Speed control is poured into 10-30m3/ h, so as not to pour water it is too fast lead to clear water spillage oil well mouth, influence to construct.After pouring into clear water,
Clear water liquid level is not decreased obviously in 30min in production string, illustrates that packer set is tight, while by clear water to construction
Section or less be sealed in production string.
After completing setting and water-pouring process, the production string of grease well head, surface layer are covered with combustible gas monitoring alarm
The fuel gas in annular space between pipe and production string is detected, and is examined with petrochemical enterprise fuel gas and toxic gas
Alert design specification is observed and predicted as examination criteria, specific execution standard GB 50493-2009.After detection is qualified, it can carry out next
Step construction, if detection is unqualified, should re-start setting.
Then, working pit is dug out around oil-water well well head.First remove wellhead oil tree, casing increases pipe nipple and first
Casing coupling, then centered on surface pipe, digging out radius is 1-1.5m, and depth is downward from oil-water well well head doughnut-shaped steel plate
The cylindrical work of 0.7-1.5m is cheated, convenient working.
Specifically, using casing-pipe cutting machine-cut except vehicle button bit sets the surface pipe sentenced in lower Y meters of range, to facilitate in oil
Installation set tube cutting machine on layer casing, and production string is cut.The height of casing-pipe cutting machine is generally 0.7m, so,
The Cutting Length of surface pipe is not less than 0.7m.After cutting to surface pipe and production string, specific cutting length need to be write down
Degree, to guarantee that oil-water well basic data is completed.Then, according to casing threads standard, i.e. GB/T 9253.2-1999, using casing
Thread generator (vertical) re-works screw thread to production string, so that the production string after cutting can be connect with wellhead installation.
Then, by the way that the adjustable lifter of casing to be mounted on production string, to seal surface pipe and oil reservoir set
Annular space between pipe, and make the production string after cutting from bottom to top successively with casing coupling, increase pipe nipple and wellhead oil tree
It is threadedly coupled, to be sealed to the annular space between production string and production string and surface pipe.Wherein, adjustable lifter
Effect be to be sealed to the annular space section between production string and surface pipe, had by Renqiu City Ke Feng oil field science service
What limit company provided, the patent No.: ZL201120447665.9.
Specifically, deblocking packer includes: the wellhead oil tree for removing big four or more, and the second oil pipe of tripping in makes second
Oil pipe is connected with plug valve make-up, and the second oil pipe above mentions sealing tubing string 0.2-0.6m, records tubing string suspending weight, continues above to propose seal pipe
Column, until the suspending weight of sealing tubing string is restored to setting preceding suspending weight, removing seal for packer is finished.Meanwhile sealing tubing string and tubing hanger
It is connected, and seat holds out against well head jackscrew in well head big four,
Specifically, the production string of well head is retightened includes: to lift pipe nipple in big four upper joint sleeve pipe, makes casing
Lifting pipe nipple is connected by flange with big four, and production string is promoted；The lifting load for controlling production string is 80-150kN (empty
Under wellbore conditions), after the promotion for completing production string, make the lifting load on of production string in the adjustable lifter of casing
On, complete retightening for well head production string.
Finally, adjusting the production string in oil-water well basic data according to the resection length of surface pipe and production string
Length, surface pipe length are connected to and repairing data, and achieve preservation.It acts sealing tubing string, completes on oil-water well oil layer casing
The governance process altered.
It will be described in detail below by specific embodiment:
Embodiment 1
It present embodiments provides in a kind of pair of Z61-6X well and alters the method administered on production string, specific steps are such as
Under:
Step 1: the pretreatment of production string
The flow string in producing well is played, sets in the predetermined position for sealing packer in tubing string to away from production string top
At 5m, the tripping in scraping tubing string in down-hole casing, in scraping tubing string, the first oil pipe, oil pipe variable buckle connector, GX-T140 casing are scraped
Device is cut sequentially to be threadedly coupled from top to bottom.Casing scraper is driven to move up and down in production string by the first oil pipe, to well
Mouthful or less 10m well section internal surface of sleeve pipe carry out a scraping, to scraping 3 times repeatedly of 5m above and below setting well section, remove in down-hole casing
Dirt, wax and the other internal surface of sleeve pipe obturators of wall.After scraping, act scraping tubing string.
Step 2: oil-water well pre-treatment
Into production string after pretreatment, (the well surface pipe outer diameter is D339.73mm, internal diameter d320.4mm；
Production string outer diameter is D139.7mm, internal diameter d124.3mm) sealing tubing string of the tripping in packer, it seals in tubing string, the
Two oil pipes, plug valve, Y211-114 packer, third oil pipe, horn mouth are sequentially threadedly coupled from top to bottom, the length of third oil pipe
525m is spent, plug valve is in close state.It seals and records tubing string suspending weight in tubing string after packer to production string depth location 5m
50KN, and packer stuck point is adjusted here, it is ready for setting.
Sealing tubing string is above mentioned into 1.3m, then slowly decentralization, to sealing tubing string pressurization 50KN；It is fallen after packer set is qualified
Take off out the second oil pipe.
Clear water is pumped into until filling the above production string of packer from well head big four, and the speed for pouring into clear water is 2m3/
h.Liquid level 30min in production string is observed, liquid level is unchanged, and packer sealing is tight.To between surface pipe and production string
Annular space be pumped into clear water, until filling；The speed for being pumped into clear water is 25m3/h。
With combustible gas monitoring alarm to the annular space between the production string, surface pipe and production string of grease well head
In fuel gas detected, using petrochemical enterprise fuel gas and toxic gas detection alarm design specification as detection
Standard is specific to execute standard GB 50493-2009, testing result zero, detection qualification.
Remove wellhead oil tree, casing increases pipe nipple and first production string box cupling.Centered on well head surface pipe,
The cylindrical work of excavating radius 1m, depth 0.7m below well head doughnut-shaped steel plate are cheated.
Step 3: cutting surface pipe and production string
Altering height on measurement well head is 50cm, and the position at the 50cm of production string top is reset to oil reservoir set
The vehicle button bit of pipe is set；On the basis of this position, the casing-pipe cutting machine of D339.73mm is installed, cuts off this position or less 0.7m depth
Interior surface pipe, the length of the surface pipe of excision are 0.7m.
The casing-pipe cutting machine that D139.7mm is installed on production string cuts off the vehicle button bit reset on production string and sets
Above production string, the production string length of excision are 0.5m.
Step 4: oil-water well post-processing
Casing threads processing machine (vertical) is installed on D139.7mm production string, executes standard GB/T according to casing threads
9253.2-1999 re-works casing threads.
Installation is by Renqiu City section peak between table set (internal diameter d320.4mm) and oil jacket (outer diameter D139.7mm) annular space
The adjustable lifter of casing (patent No.: ZL201120447665.9) that oil field science service Co., Ltd provides, to oil reservoir
Annular space between casing and surface pipe is sealed；And make cutting after production string from bottom to top successively with casing coupling,
It increases pipe nipple and wellhead oil tree is threadedly coupled, to be sealed to production string.
Tear the wellhead oil tree of big four or more open, the second oil pipe of tripping in makes the second oil pipe be connected with plug valve make-up, together
When, sealing tubing string is connected with tubing hanger, and seat holds out against well head jackscrew in well head big four, above proposes sealing by the second oil pipe
Tubing string upper lifting pipe post 0.3m records tubing string suspending weight 60KN；Continue upper lifting pipe post, tubing string suspending weight is restored to 50KN, removing seal for packer.
After sealing tubing string deblocking, pipe nipple is lifted in big four upper joint sleeve pipe, casing lifting pipe nipple is made to pass through flange and big
Four-way is connected, and promotes production string；The lifting load for controlling production string is the 200KN (weight including well oil pipe tubing string
After 50KN), the adjustment adjustable lifter of casing to closely production string box cupling lower end surface lays down production string lifting load, oil
Layer casing coupling seat is in the adjustable lifter upper surface of casing, and the production string load on of lifting is in the adjustable lifter of casing
On, the fixation of well head production string finishes；
After production string is fixed, well head working pit is backfilled, restores well head landforms；It is long to appraise and decide the removed surface pipe of well head
The length 0.5m for spending 0.7m and production string adjusts Z61-6X well base according to the length of the surface pipe of excision and production string
In plinth data table set length, be connected to and oil mend away from data, and achieve preservations (drop cover before table cover length 147.56m, be connected to
4.92m, oil are mended away from 4.35m；Table covers length 146.86m after drop set, is connected to 5.42m, and oil is mended away from 4.85m).
Tubing string is sealed in oil-water well finally, rising, and completes the improvement to altering on Z61-6X well production string.
After above-mentioned improvement, eliminates pumping unit hanging rope caused by altering on Z61-6X well production string and collide with well head packing
The problems such as box, job execution production wellhead shakes, restore the normal production of the well.By the end of current validity period be greater than 200 days and
Regulation effect continuous and effective.
Embodiment 2
It present embodiments provides in a kind of pair of J45-210 well and alters the method administered on production string, specific steps are such as
Under:
Step 1: the pretreatment of production string
The flow string in producing well is played, sets in sealing tubing string packer predetermined position to away from production string top 5m
Locate, the tripping in scraping tubing string in down-hole casing, in scraping tubing string, the first oil pipe, oil pipe variable buckle connector, GX-T140 casing scraping
Device is sequentially threadedly coupled from top to bottom.Casing scraper is driven to move up and down in production string by the first oil pipe, to well head
Following 10m well section internal surface of sleeve pipe carries out a scraping, to scraping 3 times repeatedly of 5m above and below setting well section, removes down-hole casing inner wall
Dirt, wax and other internal surface of sleeve pipe obturators.After scraping, act scraping tubing string.
Step 2: oil-water well pre-treatment
Into production string after pretreatment, (the well surface pipe outer diameter is D339.73mm, internal diameter d305mm；Oil
Layer sleeve outer is D139.7mm, internal diameter d124.3mm) sealing tubing string of the tripping in packer, it seals in tubing string, second
Oil pipe, plug valve, Y211-114 packer, third oil pipe, horn mouth are sequentially threadedly coupled from top to bottom, the length of third oil pipe
522m, plug valve are in close state.It seals and records tubing string suspending weight in tubing string after packer to production string depth location 5m
50KN, and packer stuck point is adjusted here, it is ready for setting.
Sealing tubing string is above mentioned into 1.3m, then slowly decentralization, to sealing tubing string pressurization 50KN；It is fallen after packer set is qualified
Take off out the second oil pipe.
Clear water is pumped into until filling the above production string of packer from well head big four, and the speed for pouring into clear water is
1.5m3/h.Liquid level 30min in production string is observed, liquid level is unchanged, and packer sealing is tight.To surface pipe and oil reservoir set
Annular space between pipe is pumped into clear water, until filling；The speed for being pumped into clear water is 28m3/h。
With combustible gas monitoring alarm to the annular space between the production string, surface pipe and production string of grease well head
In fuel gas detected, using petrochemical enterprise fuel gas and toxic gas detection alarm design specification as detection
Standard is specific to execute standard GB 50493-2009, testing result zero, detection qualification.
Remove wellhead oil tree, casing increases pipe nipple and first production string box cupling.Centered on well head surface pipe,
The cylindrical work of excavating radius 1.3m, depth 1.2m below well head doughnut-shaped steel plate are cheated.
Step 3: cutting surface pipe and production string
Altering height on measurement well head is 35cm, and the position at the 35cm of production string top is reset to oil reservoir set
The vehicle button bit of pipe is set；On the basis of this position, the casing-pipe cutting machine of D339.73mm is installed, cuts off this position or less 0.7m depth
Interior surface pipe, the length of the surface pipe of excision are 0.7m.
The casing-pipe cutting machine that D139.7mm is installed on production string cuts off the vehicle button bit reset on production string and sets
Above production string, the production string length of excision are 0.35m.
Step 4: oil-water well post-processing
Casing threads processing machine (vertical) is installed on D139.7mm production string, executes standard GB/T according to casing threads
9253.2-1999 re-works casing threads.
Installation is by Renqiu City section peak oil between table set (internal diameter d305mm) and oil jacket (outer diameter D139.7mm) annular space
The adjustable lifter of casing (patent No.: ZL201120447665.9) that field science service Co., Ltd provides, to oil reservoir set
Annular space between pipe and surface pipe is sealed；And make cutting after production string from bottom to top successively with casing coupling, rise
High pipe nipple and wellhead oil tree are threadedly coupled, to be sealed to production string.
Tear the wellhead oil tree of big four or more open, the second oil pipe of tripping in makes the second oil pipe be connected with plug valve make-up, together
When, sealing tubing string is connected with tubing hanger, and seat holds out against well head jackscrew in well head big four, above proposes sealing by the second oil pipe
Tubing string upper lifting pipe post 0.3m records tubing string suspending weight 65KN；Continue upper lifting pipe post, tubing string suspending weight is restored to 50KN, removing seal for packer.
After sealing tubing string deblocking, pipe nipple is lifted in big four upper joint sleeve pipe, casing lifting pipe nipple is made to pass through flange and big
Four-way is connected, and promotes production string；The lifting load for controlling production string is the 160KN (weight including well oil pipe tubing string
After 50KN), the adjustment adjustable lifter of casing to closely production string box cupling lower end surface lays down production string lifting load, oil
Layer casing coupling seat is in the adjustable lifter upper surface of casing, and the production string load on of lifting is in the adjustable lifter of casing
On, the fixation of well head production string finishes；
After production string is fixed, well head working pit is backfilled, restores well head landforms；It is long to appraise and decide the removed surface pipe of well head
The length 0.35m for spending 0.7m and production string adjusts J45-210 well according to the length of the surface pipe of excision and production string
In basic data table set length, be connected to and oil mend away from data, and achieve preservations (drop cover before table cover length 117.69m, be connected to
3.48m, oil are mended away from 2.76m；Table covers length 118.39m after drop set, is connected to 3.83m, and oil is mended away from 3.31m).
Tubing string is sealed in oil-water well finally, rising, and completes the improvement to altering on J45-210 well production string.
After above-mentioned improvement, eliminates in 200 meters of well sections of well head caused by being altered on J45-210 well production string or less and take out
The problems such as beam hanger eccentric wear, job execution production wellhead shake, and wellhead casing pipe Rewelding fixes damage casing, is restoring the well just
Often production.It is greater than 480 days and regulation effect continuous and effective by the end of current validity period.
The foregoing is merely presently preferred embodiments of the present invention, the protection scope being not intended to limit the invention, all in this hair
Within bright spirit and principle, any modification, equivalent replacement, improvement and so on should be included in protection scope of the present invention
Within.
Claims (5)
1. a kind of administer the method altered on oil-water well oil layer casing, comprising: act the flow string in oil-water well, to production string
It is pre-processed, pre-treatment is carried out to oil-water well, then cuts surface pipe and production string, after finally being carried out to oil-water well
Reason；
It is described to production string carry out pretreatment include: with casing scraper within the scope of 10m below the oil-water well well head
The production string inner wall carries out scraping, to remove the dirt of the production string inner wall；
It is described to oil-water well carry out pre-treatment include: into the production string after pretreatment tripping in it is close with packer
Sealing pipe column, the sealing tubing string include: the second oil pipe, plug valve, third oil pipe, horn mouth；Second oil pipe, the cock
Valve, the packer, the third oil pipe, the horn mouth are sequentially connected from top to bottom, and the third tubing length is 310-
480m, the plug valve are in close state；The sealing tubing string is recorded in the tubing string suspending weight in predetermined position, makes the packer
Be stuck in the predetermined position, and carry out it is setting, then to be located at the packer top the production string and the oil
It is filled the water in annular space between layer casing and surface pipe, by the way that the adjustable lifter of casing is mounted on the surface pipe and institute
It states at the annular space between production string, and keeps the production string after cutting successively short with casing coupling, raising from bottom to top
Section and wellhead oil tree are threadedly coupled, to the ring between the production string and the production string and the surface pipe
Sky is sealed；Finally the oil-water well well head fuel gas is detected, after detection is qualified, in the oil-water well well head week
It encloses and digs out working pit, complete the pre-treatment of the oil-water well；The predetermined position is in production string, apart from the production string
Any position below top 3m；
The cutting surface pipe and production string include: that will alter height on oil-water well well head production string to be denoted as X meters, will be away from
The vehicle button bit for being reset to the production string from the position at described production string top X meters is set；By casing-pipe cutting machine
Height is denoted as Y meters, cuts off the vehicle button bit using described sleeve pipe cutting machine and sets the surface pipe sentenced in lower Y meters of range,
It then cuts off the vehicle button bit and sets above production string；
The ring between the production string and the production string and surface pipe that are located at the packer top
Aerial water filling, comprising:
With 2-5m3The speed of/h is filled the water into the production string, and the liquid level of water is set not higher than the vehicle button bit；
With 10-30m3The speed of/h is filled the water into the annular space between the production string and surface pipe, and the liquid level of water is not high
It is set in the vehicle button bit；
It is described to oil-water well carry out post-processing include: to set upper processing casing spiral shell in the vehicle button bit of the production string of reset
Line, is sealed the annular space between the production string and the production string and the surface pipe, then passes through institute
It states the second oil pipe and above mentions the sealing tubing string, until the suspending weight for sealing tubing string and setting preceding equal, the removing seal for packer
It finishes, then the production string of the well head is retightened, finally record the excision of the surface pipe and the production string
Length restores the oil-water well well head landforms, acts the sealing tubing string.
2. according to claim 1 administer the method altered on oil-water well oil layer casing, which is characterized in that described sleeve pipe scraping
Device also passes through oil pipe variable buckle connector and connect with the first tubing round thread, and first oil pipe, the oil pipe variable buckle connector, the set
Pipe scraper is sequentially arranged from top to bottom, by first oil pipe drive described sleeve pipe scraper in the production string on
Lower movement.
3. according to claim 1 administer the method altered on oil-water well oil layer casing, which is characterized in that the setting packet
It includes: above mentioning the sealing tubing string 1.2-1.6m, then slowly put down, apply the pressure of 3-8t on the sealing tubing string, complete
It is described setting, and second oil pipe is buckled to and is taken out.
4. according to claim 1 administer the method altered on oil-water well oil layer casing, which is characterized in that the working pit with
Centered on the surface pipe, excavating radius 1-1.5m, depth is from the downward 0.7- of oil-water well well head doughnut-shaped steel plate
1.5m。
5. according to claim 1 administer the method altered on oil-water well oil layer casing, which is characterized in that by the well head
It includes: that casing lifting pipe nipple is made to be connected by flange with big four that production string, which retightens, controls mentioning for the production string
Pulling load is 80-150kN, after the promotion for completing the production string, makes the lifting load on of the production string in described
On the adjustable lifter of casing, retightening for the production string is completed.
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| CN109322634B (en) * | 2017-07-31 | 2021-01-01 | 中国石油天然气股份有限公司 | Oil well wellhead fixing device |
| CN108691515B (en) * | 2018-05-04 | 2020-07-10 | 中国石油天然气股份有限公司 | Device and method for treating oil-water well oil layer casing pipe channeling |
| CN109538148A (en) * | 2018-09-30 | 2019-03-29 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of soft metal expandable casing patching coal bed gas well suck-back layer 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 |
| CN112681996B (en) * | 2019-10-18 | 2022-11-04 | 中国石油天然气股份有限公司 | Casing leakage repairing method |
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