CN106930713A - A kind of casing damage restorative procedure - Google Patents
A kind of casing damage restorative procedure Download PDFInfo
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- CN106930713A CN106930713A CN201511032551.7A CN201511032551A CN106930713A CN 106930713 A CN106930713 A CN 106930713A CN 201511032551 A CN201511032551 A CN 201511032551A CN 106930713 A CN106930713 A CN 106930713A
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- Prior art keywords
- tubing string
- well section
- well
- plugging
- sleeve pipe
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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
- 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
- E21B29/10—Reconditioning of well casings, e.g. straightening
Abstract
The invention discloses a kind of casing damage restorative procedure, belong to oil recovery technique field.Methods described includes：Determine the damaged improvement well section of oil-water well middle sleeve；Administering, ash plug is set between well section and production well section；Enter plugging tubing string in the case where administering in well section；The top circle of well section is administered by being blocked on the swollen sleeve pipe being affixed in oil-water well of expansion tube；Chemical plugging agent is injected to the annular space between plugging tubing string hypomere integral joint casing and sleeve pipe, the bottom circle of well section is administered in closure；Brill opens grey plug, recovers oil flow channel in pit shaft.The present invention blocks improvement well section top circle by swollen being affixed on sleeve pipe of expansion tube of plugging tubing string epimere, then passes through the annular space that chemical plugging agent is blocked between the integral joint casing and sleeve pipe of plugging tubing string hypomere, and closure is administered well section bottom circle, realizes the reparation to improvement well section.Correlation technique long construction period is solved, the problem that working procedure is cumbersome and construction cost is higher has reached damaged and reduction construction cost the purpose of safe and efficient reparation Casing Failure.
Description
Technical field
The present invention relates to oil recovery technique field, more particularly to a kind of casing damage restorative procedure.
Background technology
As oil field development enters mid-later development phase, the set of oil-water well (oil-water well is producing well or water injection well)
Pipe damaging problem is increasingly highlighted, and the problem has a strong impact on the normal production of oil-water well, and to oil-water well operation
Construction brings difficulty.
There is sleeve pipe to take set to there is section long, the repairing and treating means of the oil-water well of multiple spot casing damage at present,
Small casing is cemented the well again, shows that compression strength is high, plugging effect reliability after the method repairing and treating, is had
The advantage such as the effect phase is long, but there are problems that long construction period, working procedure be cumbersome, construction cost relatively.
The content of the invention
In order to solve the problems, such as that long construction period, working procedure are cumbersome and construction cost is higher in the prior art,
The embodiment of the invention provides a kind of casing damage restorative procedure.The technical scheme is as follows：
According to the first aspect of the invention, there is provided a kind of casing damage restorative procedure, methods described includes：
Determine the damaged improvement well section of oil-water well middle sleeve, the improvement well section be need in the oil-water well into
The well section that row is repaired；
Ash plug is set between the improvement well section and production well section, and the production well section is made a living where payzone
Well section；
Enter plugging tubing string under in the improvement well section, the plugging tubing string is by epimere expansion tube and hypomere without connecing
Cuff pipe is constituted, and the expansion tube is located at the design attitude above the top circle of the improvement well section；
By the top circle that the improvement well section is blocked on the swollen sleeve pipe being affixed in the oil-water well of the expansion tube；
It is stifled to the annular space injection chemistry between the plugging tubing string hypomere integral joint casing and described sleeve pipe
Agent, blocks the bottom circle for administering well section；
Brill opens the ash plug, and oil flow channel in pit shaft in the recovery oil-water well, plugging construction is finished.
Alternatively, the improvement well section for determining that described sleeve pipe is damaged, including：
The damaged improvement of described sleeve pipe is determined by sleeve pipe turbine flow leakage seeking and sleeve pipe hole diameter measuring technology
Well section.
Alternatively, it is described to enter plugging tubing string under described improvement in well section, including：
The improvement well section will be entered under the plugging tubing string；
The position of the expansion tube on the plugging tubing string is determined by natural gamma depth correction skill；
Position according to the expansion tube determines the position of the plugging tubing string, makes swollen on the plugging tubing string
Tube expansion is located at preset height more than the improvement well section top circle.
Alternatively, the annular space between the plugging tubing string hypomere integral joint casing and described sleeve pipe
Injection chemical plugging agent, blocks the bottom circle for administering well section, including：
Enter to note chemical plugging agent sealing tubing string under from the plugging tubing string；
Production tree is installed, the note chemical plugging agent is sealed tubing string and is connected with pump truck by production tree；
By the pump truck to injecting chemical plugging agent in the annular space.
Alternatively, it is described by the pump truck to injecting chemical plugging agent in the annular space, including：
The described chemical stifled of preset vol is injected in sealing tubing string to the note chemical plugging agent by the pump truck
Agent；
The water of injection preset vol in tubing string is sealed to the note chemical plugging agent by the pump truck, it is described default
The water of volume is used to for the chemical plugging agent to replace the push-in plugging tubing string bottom.
After above carrying the note chemical plugging agent sealing tubing string, injecting water by the pump truck carries out anti-flushing well；
Inject default to the annular space that the note chemical plugging agent is sealed between tubing string and sleeve pipe by the pump truck
The water of volume, the annular space between the plugging tubing string and sleeve pipe is just being clamp-oned by the chemical plugging agent.
Alternatively, it is described above carry it is described note chemical plugging agent sealing tubing string after, by the pump truck inject water carry out
Anti-flushing well, including：
The note chemical plugging agent sealing tubing string is above carried, the note chemical plugging agent is sealed tubing string and is located at the closure
It is more than tubing string；
Annular space water filling between tubing string and described sleeve pipe is sealed to the note chemical plugging agent by the pump truck
Carry out anti-flushing well.
Alternatively, it is described to be injected after chemical plugging agent in the annular space by the pump truck, the side
Method also includes：
The oil-water well preset duration to the chemical plugging agent is closed to solidify.
Alternatively, the chemical plugging agent is thermosetting resin.By petroleum production engineering research institute of North China Oilfield branch company
There is provided, the patent No.：ZL201110314478.8.
Alternatively, before the improvement well section for determining that oil-water well middle sleeve is damaged, methods described also includes：
Drifting is carried out to the oil-water well by gauguste cutter.
Alternatively, it is described it is described improvement well section under enter plugging tubing string before, methods described also includes：
By full well section sleeve pipe more than casing scraper scraping red dog, the red dog is the upper end of the ash plug
Face.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
Closure casing damage well section top circle on sleeve pipe is affixed on by the way that the expansion tube of plugging tubing string epimere is swollen, then is passed through
Annular space between the integral joint casing and sleeve pipe of chemical plugging agent closure plugging tubing string hypomere, closure sleeve pipe breaks
The bottom circle of well section is damaged, the oil-water well reparation to casing damage is realized.Correlation technique long construction period is solved,
The problem that working procedure is cumbersome and construction cost is higher.Safe and efficient reparation Casing Failure is reached damaged
With the purpose for reducing construction cost.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, institute in being described to embodiment below
The accompanying drawing for needing to use is briefly described, it should be apparent that, drawings in the following description are only the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of flow chart of the casing damage restorative procedure shown in the embodiment of the present invention；
Fig. 2-1 is the flow chart of another casing damage restorative procedure shown in the embodiment of the present invention；
Fig. 2-2 is the flow chart of setting plugging tubing string in Fig. 2-1 illustrated embodiments；
Fig. 2-3 is the flow chart of injection chemical plugging agent in Fig. 2-1 illustrated embodiments.
By above-mentioned accompanying drawing, it has been shown that the present invention clearly embodiment, will hereinafter be described in more detail.
These accompanying drawings and word description are not intended to be limited by any mode the scope of present inventive concept, but logical
It is that those skilled in the art illustrate idea of the invention to cross with reference to specific embodiment.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to the present invention
Implementation method is described in further detail.
Fig. 1 is a kind of flow chart of the casing damage restorative procedure shown in the embodiment of the present invention, the present embodiment with
The casing damage restorative procedure is applied to repair the damaged well section of damaged sleeve pipe to illustrate.The casing damage
Restorative procedure includes following several steps：
In a step 101, determine the damaged improvement well section of oil-water well middle sleeve, administer well section in oil-water well
The well section that needs are repaired.
In a step 102, ash plug is set administering between well section and production well section, production well section is made a living payzone
The well section at place.
In step 103, plugging tubing string is entered in the case where administering in well section, plugging tubing string is by epimere expansion tube with
Section integral joint casing is constituted, and expansion tube is located at the design attitude above the top circle for administering well section.
At step 104, the top circle of well section is administered by being blocked on the swollen sleeve pipe being affixed in oil-water well of expansion tube.
In step 105, to the annular space injectionization between plugging tubing string hypomere integral joint casing and sleeve pipe
Blocking agent is learned, the bottom circle of well section is administered in closure.
In step 106, bore and open grey plug, oil flow channel in pit shaft in recovery oil-water well, plugging construction is finished.
In sum, casing damage restorative procedure provided in an embodiment of the present invention, by plugging tubing string epimere
Expansion tube is swollen to be affixed on sleeve pipe the top circle for blocking casing damage well section, then blocks plugging tubing string by chemical plugging agent
Annular space between the integral joint casing and sleeve pipe of hypomere, blocks the bottom circle of casing damage well section, and it is right to realize
The reparation of the oil-water well of casing damage.Correlation technique long construction period is solved, working procedure is cumbersome and constructs
Relatively costly problem.Damaged and reduction construction cost the mesh of safe and efficient reparation Casing Failure is reached
's.
Fig. 2-1 is the flow chart of another casing damage restorative procedure shown in the embodiment of the present invention, the present embodiment
It is applied to repair the damaged well section of damaged sleeve pipe in oil-water well with the casing damage restorative procedure to illustrate.
The casing damage restorative procedure can include following several steps：
In step 201, drifting is carried out to oil-water well by gauguste cutter.
When using casing damage restorative procedure provided in an embodiment of the present invention, the life in oil-water well is played out first
Produce tubing string and drifting is carried out to oil-water well by gauguste cutter.Exemplary, flow string includes oil pipe, oil pumping
Bar and oil well pump.
The process for carrying out drifting by gauguste cutter is：Under enter the drifting tubing string with gauguste cutter, drifting tubing string bag
Include oil pipe, oil pipe and become buckle joint and gauguste cutter, the drifting tubing string upper end is oil pipe, oil pipe lower end connected pipes
Become buckle joint, oil pipe becomes buckle joint lower end connection gauguste cutter；Oil pipe, oil pipe become between buckle joint and gauguste cutter
It is threaded connection.When entering drifting tubing string under, enter under speed of the well head by 8~10m/min (m/min)
Drifting tubing string carries out anti-flushing well afterwards to artificial bottom of a well, and pumping into clear water from oil jacket annular space cooks flushing fluid, well-flushing
Liquid is returned out from oil pipe, and the displacement control of flushing fluid is in 20~30m3/ h (cube m/h), treats to be returned out from oil pipe
Stop well-flushing during clear water, act drifting tubing string.
In step 202., sleeve pipe is determined by sleeve pipe turbine flow leakage seeking and sleeve pipe hole diameter measuring technology
Damaged improvement well section.
After drifting is completed, sleeve pipe is determined by sleeve pipe turbine flow leakage seeking and sleeve pipe hole diameter measuring technology
Damaged improvement well section.
Specifically, by sleeve pipe turbine flow leakage seeking look for Lou first, this is looked for and leaks through journey and be：Broken
Enter under damaging in sleeve pipe and look for Lou testing tool pipe string with turbine flowmeter, look for Lou testing tool pipe string to include adding
Weight bar and turbine flowmeter, this looks for Lou testing tool pipe string to be connected with ground test car by test cable, leads to
In crossing ground test car release test cable and entering sleeve pipe under turbine flowmeter；Continuously noted in well head using pump truck
Enter clear water, the displacement control of injected clear water is in 15~25m3/ h, measures different in sleeve pipe by turbine flowmeter
The changes in flow rate of position, to determine the definite well section of casing damage.The process may be referred to correlation technique,
This is repeated no more.
Sleeve pipe hole diameter test is carried out afterwards, specifically, the process of the test is：Enter set under in the damaged sleeve pipe
Pipe diameter tester, sleeve pipe diameter tester is connected by test cable with ground test car, is surveyed by ground
Test run release test cable will enter in damaged sleeve pipe under diameter tester, and coordinate test carriage to obtain sleeve pipe hole diameter
Data, the result that comprehensive sleeve pipe turbine flow leakage seeking is obtained afterwards determines the improvement well section of casing damage.
In step 203, ash plug is set administering between well section and production well section, production well section is made a living payzone
The well section at place.
After the position of improvement well section for obtaining casing damage, in improvement well section and the production of casing damage
Ash plug, design attitude of the ash plug below the improvement well section bottom circle of casing damage are set between well section.
Exemplary, the process is：Enter under in the sleeve pipe with bell-mouthed cement injecting tubing string, cement injecting tubing string from
Well head is from top to bottom oil pipe and horn mouth；It is threaded connection between oil pipe and horn mouth；From in oil pipe with 700
Type pump truck injects mortar, and mortar is the mixture of oil-well cement and clear water, the density of mortar 1.8~
1.85g/cm3Between (gram/cc), ash plug thickness is between 10~15m (rice)；Control 700 types
Pump truck output is in 20~30m3/ h, make ash plug upper surface 35 below the improvement well section bottom circle of casing damage~
Between 45m.
After mortar is injected, wait 48 hours to ash plug solidification, then transfer cement injecting tubing string and visit ash table beyond the Great Wall
Face, determines whether the actual grade of red dog meets requirement, is such as unsatisfactory for being adjusted again.
In step 204, by full well section sleeve pipe more than casing scraper scraping red dog, red dog is filled in for ash
Upper surface.
After formation ash plug in sleeve pipe, by more than casing scraper scraping red dog full well section sleeve pipe.
Exemplary, the process of scraping sleeve pipe is：Enter with GX-T140 casing scrapers under in the sleeve pipe
Scraping tubing string carries out a scraping to internal surface of sleeve pipe more than red dog (grey surface beyond the Great Wall), removes down-hole casing
The dirt of inwall, wax and other inwall obturators, scrape repeatedly in the upper and lower 10~30m of expandable casing patching well section
Cut 3 times.Scraper column of casing upper end is oil pipe, and oil pipe lower end connected pipes become buckle joint, and oil pipe becomes snapping
Head lower end connection sleeve pipe scraper；Oil pipe, oil pipe become between buckle joint and casing scraper to be threadedly coupled.
Sleeve pipe scraping carries out anti-flushing well after finishing, i.e., pumping into clear water from oil jacket annular space cooks flushing fluid, and flushing fluid is from oil pipe
Return out, the displacement control of flushing fluid is in 20~30m3/ h, whne when oil pipe returns out clear water stop well-flushing and go out
Scraping tubing string.
Terminate to this step, have been completed the preparation of early stage.
In step 205, in the improvement well section of casing damage under enter plugging tubing string, plugging tubing string is by epimere
Expansion tube and hypomere integral joint casing are constituted, and expansion tube is located at more than the improvement well section top circle of casing damage setting
Meter position.
After the preparation for completing early stage, in the improvement well section of casing damage under enter plugging tubing string, seal
Plugging post is made up of epimere expansion tube and hypomere integral joint casing, and expansion tube is located at the improvement well section of casing damage
Design attitude more than top circle.
As shown in Fig. 2-2, this step can include following 3 sub-steps：
In sub-step 2051, will enter to administer well section under plugging tubing string.
The casing damage of the measurement result determination of turbine flow leakage seeking and sleeve pipe hole diameter measuring technology is pressed first
Improvement well section, determine the length and depth of setting of plugging tubing string.
Wherein, sleeve pipe plugging tubing string from top to bottom include expansion tube, sleeve pipe variable buckle pipe nipple, casing stabbing board and
Integral joint casing；Screw thread is between integral joint casing, casing stabbing board, sleeve pipe variable buckle pipe nipple, expansion tube
Connection；, by entering predetermined block-up position under connected pipes, connected pipes are from the bottom up successively for sleeve pipe plugging tubing string
It is expander connecting rod, little oil pipe, school depth pipe nipple and oil pipe；Expander connecting rod, little oil pipe, school are deeply short
It is threaded connection between section and oil pipe；Wherein oil pipe is the external upset tubing of diameter 73mm (millimeter), small oil
It is the external upset tubing of diameter 63.5mm to manage, and expansion length of tube is 1 with integral joint casing length ratio:10.Nothing connects
The external diameter of cuff pipe is 114.3mm.
In step 2052, the position of the expansion tube on plugging tubing string is determined by natural gamma depth correction skill.
After entering plugging tubing string under, the position of the expansion tube on plugging tubing string is determined by natural gamma depth correction skill
Put.Exemplary, the process is：Enter the test schools depth works that three parameter logging instruments are passed with number under in the oil pipe
Tool pipe string, test school depth tool pipe string includes that weighted lever sum passes three parameter logging instruments, test school depth tool pipe
String is connected by test cable with ground test car, and discharge test cable by ground test car passes three ginsengs by number
In entering oil pipe under number logging instruments；By editing the depth of school depth pipe nipple upper surface, in determining sleeve pipe plugging tubing string
The accurate location of expansion tube.Natural gamma depth correction skill refers to correlation technique, will not be repeated here.
In step 2053, the position according to expansion tube determines the position of plugging tubing string, makes on plugging tubing string
Expansion tube is located at preset height more than the improvement well section top circle of casing damage.
After the accurate location that expansion tube is determined, the position according to expansion tube determines the position of plugging tubing string,
The expansion tube on plugging tubing string is set to be located at preset height more than the improvement well section top circle of casing damage.It is exemplary
, adjustment plugging tubing string when, make expansion tube lower surface be located at casing damage improvement well section top circle more than 10~
Between 15m；Integral joint casing lower surface is located at below the improvement well section bottom circle of casing damage between 30~40m.
In step 206, suppressed by pump truck, extrusion expansion tube swelling, make that expansion tube is swollen to be affixed on sleeve pipe,
The top circle of well section is administered in closure.
After plugging tubing string is adjusted, suppressed by pump truck, extrusion expansion tube swelling, make that expansion tube is swollen to be affixed on
On sleeve pipe, the top circle of well section is administered in closure.
Exemplary, the process is：Record plugging tubing string suspending weight, oil pipe is connected by pipeline with pressuring pump；
On ground, pressuring pump clamp-ons clear water from oil pipe by pipeline, treats that the pump pressure of pressuring pump reaches facing for expansion tube
Expansion tube starts to expand from the bottom up during boundary's pressure, treats the length and pressuring pump of oil pipe up whole expansion tube
The construction of expansion tube swelling is finished when pump pressure bust, wellhead casing pipe return water；The control of oil pipe suspending weight exists when oil pipe is up
More than suspending weight 10~30KN (thousand Ns)；The clear water discharge capacity suppressed is 0.8~1.5m3/h.In expansion tube swelling
After finishing, 5~10m of connected pipes is above carried, casing pressure test is implemented by ground pump truck；The pressure of casing pressure test
Be 15Mpa (MPa), voltage stabling control >=30min (minute), pressure drop≤0.5MPa for qualified, expansion tube
Expansion construction may be referred to correlation technique with casing pressure test, will not be repeated here.
In step 207, to the annular space injectionization between plugging tubing string hypomere integral joint casing and sleeve pipe
Blocking agent is learned, the bottom circle of well section is administered in closure.
It is qualified in expansion tube and above casing pressure test, and lower fishing string pull out expansion tube bottom bottom it is stifled after,
Chemical plugging agent is injected to the annular space between plugging tubing string hypomere integral joint casing and sleeve pipe, well is administered in closure
The bottom circle of section.
As Figure 2-3, this step can include following 10 sub-steps：
In sub-step 207a, from plugging tubing string under enter to note chemical plugging agent sealing tubing string.
Enter to note chemical plugging agent sealing tubing string under first from plugging tubing string.Exemplary, the process is：In set
Enter under in pipe with bell-mouthed note chemical plugging agent sealing tubing string, note chemical plugging agent seals tubing string from well head from upper
And lower is oil pipe, chamfering oil pipe and horn mouth；It is threadedly coupled between oil pipe, chamfering oil pipe, horn mouth, note
Chemical plugging agent sealing tubing string is located at more than integral joint casing lower surface between 5~10m, and chamfering oil pipe is located at loudspeaker
To between more than expansion tube upper surface 20~30m, described chamfering oil pipe is external diameter 73mm to mouth, end face is
45 degree of heavy wall tubing.
In sub-step 207b, production tree is installed, note chemical plugging agent is sealed tubing string and pass through production tree and pump truck
It is connected.
After entering to note chemical plugging agent sealing tubing string under, wellhead tree tree is installed, makes note chemistry stifled by production tree
Agent sealing tubing string is connected with pump truck.Exemplary, the installation process of production tree is：Will note chemical plugging agent envelope
The oil pipe of mouth tubing string is connected with tubing hanger, is to be threadedly coupled between oil pipe and tubing hanger；Tubing hanging seat is in oil recovery
Inside the big four of tree, jackscrew is held out against；KYS65/25 production trees are installed, production tree is connected with pump truck by pipeline
Connect, be to be threadedly coupled between pipeline, production tree and pump truck.Production tree master valve is closed after the completion of connection, it is right
Well head and surface line carry out pressure testing, and pressure is 25MPa and 3~5min of voltage stabilizing, and well head is not pierced and do not leaked to close
Lattice, to check whether well head sealing property is qualified.
In sub-step 207c, by pump truck to injecting chemical plugging agent in annular space.
After in installation production tree, simultaneously pressure testing is qualified, by pump truck to the annular space between plugging tubing string and sleeve pipe
Middle injection chemical plugging agent.
This step is divided into:
1) chemical plugging agent of injection preset vol in tubing string is sealed to note chemical plugging agent by pump truck.
Seal the chemical plugging agent of injection preset vol in tubing string to note chemical plugging agent by pump truck first.It is exemplary
, inject 1.0~2.5m of chemical plugging agent with 700 type pump trucks3(cubic meter), wherein, chemical plugging agent is thermosetting
Property resin.
2) water of injection preset vol in tubing string is sealed to note chemical plugging agent by pump truck, the water of preset vol is used
Plugging tubing string bottom is pushed in chemical plugging agent is replaced.
After the chemical plugging agent of injection preset vol, injected in sealing tubing string to note chemical plugging agent by pump truck
The water of preset vol, the water of preset vol is used to for chemical plugging agent to replace push-in plugging tubing string bottom.It is exemplary
, 3~9m of injected clear water3。
In sub-step 207d, note chemical plugging agent sealing tubing string is above carried, note chemical plugging agent is sealed tubing string and be located at envelope
It is more than plugging post.
Replace after push-in chemical plugging agent, above carry note chemical plugging agent sealing tubing string, make note chemical plugging agent sealing tube
Post is located at more than plugging tubing string.Exemplary, the lower end for making note chemical plugging agent seal tubing string is located on expansion tube
20 more than end face~30m.
In sub-step 207e, the annular space between tubing string and sleeve pipe is sealed to note chemical plugging agent by pump truck
Water filling carries out anti-flushing well.
After completing to note chemical plugging agent sealing above the carrying of tubing string, to note chemical plugging agent sealing tubing string and sleeve pipe it
Between annular space carry out anti-flushing well with pump truck water filling, the clear water that 1~1.5 times of well of reacting cycle well-flushing holds, with clear
Wash the chemical plugging agent remained in note chemical plugging agent sealing tubing string, it is to avoid chemical plugging agent blocks note chemical plugging agent sealing
Tubing string.
In sub-step 207f, the annular space between tubing string and sleeve pipe is sealed to note chemical plugging agent by pump truck
The water of preset vol is injected, the water of preset vol is used to clamp-on chemical plugging agent between plugging tubing string and sleeve pipe
Annular space.
Complete note chemical plugging agent sealing tubing string and sleeve pipe between annular space anti-flushing well after, by pump truck to
Annular space between note chemical plugging agent sealing tubing string and sleeve pipe injects the water of preset vol, the water of preset vol
It is exemplary for chemical plugging agent to be clamp-oned the annular space between plugging tubing string and sleeve pipe, with 700 type pumps
Car injected clear water, 0.2~0.6m of injected clear water3, control chemical plugging agent terminal surface integral joint casing lower surface with
Between upper 30~40m.
In sub-step 207g, after chemical plugging agent clamp-ons annular space, oil-water well preset duration to chemistry is closed
Blocking agent solidifies.
After the injection for completing chemical plugging agent, close oil-water well preset duration to chemical plugging agent and solidify.It is exemplary
, closing well 3 to 7 days, to wait chemical plugging agent to solidify.
In sub-step 207h, chemical plugging agent setting time terminates, and visits blocking agent plug face.
After the completion of chemical plugging agent solidification, chemical plugging agent plug can be formed, now decentralization note chemical plugging agent sealing tube
Post visits chemical plugging agent plug face (upper surface)；Determine the specific depth in chemical plugging agent plug face.If chemical plugging agent plug face
It is qualified higher than plugging tubing string lower surface Ji Sai faces.
In sub-step 207i, chemical plugging agent plug is bored by boring plug tubing string.
Determine chemical plugging agent plug face it is qualified after, in the sleeve pipe under enter the brill plug tubing string with tricone bit,
Bore plug tubing string from well head from top to bottom be oil pipe, chamfering oil pipe, screw drill and tricone bit, oil pipe, fall
Angle oil pipe, between screw drill and tricone bit for threaded connection；3~10m/min (m/min) is pressed from well head
Speed under enter bore plug tubing string to chemical plugging agent plug face on 5 ± 1m；Injected with 700 type pump trucks by oil pipe afterwards
Plug flushing fluid is bored, the discharge capacity for boring plug flushing fluid is 25~30m3/h；Treat that oil jacket annular space returning fluid enters with oil pipe
Brill plug flushing fluid it is consistent when, by under 0.5~1m/min speed enter bore plug tubing string, bore plug tubing string pressurization tonnage
Between 5~15KN (thousand Ns)；When entering 8~10m under brill plug tubing string is every, above put and put brill plug tubing string one
It is secondary；When boring plug to red dog -1m, stop brill and fill in and carry out well-flushing, treat to enter from oil jacket annular space returning fluid and oil pipe
Flushing fluid it is consistent when stop well-flushing, above carry brill plug tubing string 5~10m.
In sub-step 207j, casing pressure test.
After brill opens chemical plugging agent plug, casing pressure test is carried out, test the plugging effect of chemical plugging agent.
Exemplary, pressure testing process is：Hang brill plug tubing string connected pipes, tubing hanger connection blowout preventer is total
Into.Bore plug tubing string, between tubing hanger, blowout prevention assembly for threaded connection；Tubing hanging seat is in the big by four of production tree
It is logical internal, hold out against well head jackscrew.Then blowout prevention assembly and pump truck, pipeline, blowout prevention assembly are connected by pipeline
With being threadedly coupled between pump truck, wellhead blowout preventor and Christmas tree big four joint connection gate are closed, managed from plug is bored
To the annular pressure test between integral joint casing and plugging tubing string and sleeve pipe, pressure is the interior ground pump truck of post
15Mpa, voltage stabling control >=30min, pressure drop≤0.5MPa then illustrates that the plugging effect of chemical plugging agent is qualified.
In a step 208, after casing pressure test is qualified, brill opens grey plug, oil circulation in pit shaft in recovery oil-water well
Road, plugging construction is finished.
After casing pressure test is qualified, brill opens grey plug, recovers in oil-water well oil flow channel, plugging construction in pit shaft
Finish.It is exemplary, after chemical plugging agent plugging effect is qualified, continue to implement to bore plug job execution, by 0.5~
Enter to bore plug tubing string under 1m/min speed, the pressurization tonnage for boring plug tubing string is controlled between 5~15KN, bore plug and wash
25~the 30m of discharge capacity of well liquid3/h；When entering 8~10m under brill plug tubing string is every, above put and put brill plug tubing string once；
Brill ash plug continues to bore after terminating to be filled in during to artificial bottom of a well -1m, is stopped brill and is filled in and carry out well-flushing, treats that oil jacket annular space is returned
Stop well-flushing when to go out liquid consistent with the flushing fluid that oil pipe enters, rise and to bore plug tubing string.
The ash plug between the improvement well section of casing damage and production well section is bored out at the end of this step, has recovered well
Oil flow channel in cylinder.
It should be noted that the construction of lower flow string is carried out to the oil-water well for the ease of follow-up continuation,
After brill opens ash plug, completion construction is carried out.Exemplary, the process is：Set by geological design requirement and engineering
Enter the flow string that recovers the oil under meter.Oil recovery flow string be followed successively by from top to bottom from well head threaded connection oil pipe,
Oil well pump, screen casing or gas anchor and starting taper.
In sum, casing damage restorative procedure provided in an embodiment of the present invention, seals by noting chemical plugging agent
After mouth tubing string completes the injection of chemical plugging agent, above carry note chemical plugging agent sealing tubing string and carry out anti-flushing well, reach
Avoid chemical plugging agent from remaining and block the effect that note chemical plugging agent seals tubing string.
In sum, casing damage restorative procedure provided in an embodiment of the present invention, by plugging tubing string epimere
Expansion tube is swollen to be affixed on plugging damaged sleeve pipe well section top circle on sleeve pipe, then is blocked under plugging tubing string by chemical plugging agent
Annular space between the integral joint casing and sleeve pipe of section, the bottom circle of plugging damaged sleeve pipe well section is realized to set
The reparation of the damaged oil-water well of pipe.Correlation technique long construction period is solved, working procedure is cumbersome and is constructed into
This problem higher.Damaged and reduction construction cost the purpose of safe and efficient reparation Casing Failure is reached.
Those of ordinary skill in the art's understanding realizes that all or part of step of above-described embodiment can be by hardware
To complete, it is also possible to instruct the hardware of correlation to complete by program, described program can be stored in one kind
In computer-readable recording medium, storage medium mentioned above can be read-only storage, disk or CD
Deng.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all of the invention
Within spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in of the invention
Within protection domain.
Claims (10)
1. a kind of casing damage restorative procedure, it is characterised in that methods described includes：
Determine the damaged improvement well section of oil-water well middle sleeve, the improvement well section be need in the oil-water well into
The well section that row is repaired；
Ash plug is set between the improvement well section and production well section, and the production well section is made a living where payzone
Well section；
Enter plugging tubing string under in the improvement well section, the plugging tubing string is by epimere expansion tube and hypomere without connecing
Cuff pipe is constituted, and the expansion tube is located at the design attitude above the top circle of the improvement well section；
By the top circle that the improvement well section is blocked on the swollen sleeve pipe being affixed in the oil-water well of the expansion tube；
It is stifled to the annular space injection chemistry between the plugging tubing string hypomere integral joint casing and described sleeve pipe
Agent, blocks the bottom circle for administering well section；
Brill opens the ash plug, and oil flow channel in pit shaft in the recovery oil-water well, plugging construction is finished.
2. method according to claim 1, it is characterised in that the determination described sleeve pipe is damaged to be controlled
Reason well section, including：
The damaged improvement of described sleeve pipe is determined by sleeve pipe turbine flow leakage seeking and sleeve pipe hole diameter measuring technology
Well section.
3. method according to claim 1, it is characterised in that it is described in the improvement well section under enter
Plugging tubing string, including：
The improvement well section will be entered under the plugging tubing string；
The position of the expansion tube on the plugging tubing string is determined by natural gamma depth correction skill；
Position according to the expansion tube determines the position of the plugging tubing string, makes swollen on the plugging tubing string
Tube expansion is located at preset height more than the improvement well section top circle.
4. method according to claim 1, it is characterised in that it is described to the plugging tubing string hypomere without
Annular space injection chemical plugging agent between box cupling sleeve pipe and described sleeve pipe, blocks the bottom circle for administering well section,
Including：
Enter to note chemical plugging agent sealing tubing string under from the plugging tubing string；
Production tree is installed, the note chemical plugging agent is sealed tubing string and is connected with pump truck by production tree；
By the pump truck to injecting chemical plugging agent in the annular space.
5. method according to claim 4, it is characterised in that it is described by the pump truck to the ring
Chemical plugging agent is injected in shape space, including：
The described chemical stifled of preset vol is injected in sealing tubing string to the note chemical plugging agent by the pump truck
Agent；
The water of injection preset vol in tubing string is sealed to the note chemical plugging agent by the pump truck, it is described default
The water of volume is used to for the chemical plugging agent to replace the push-in plugging tubing string bottom；
After above carrying the note chemical plugging agent sealing tubing string, injecting water by the pump truck carries out anti-flushing well；
Inject default to the annular space that the note chemical plugging agent is sealed between tubing string and sleeve pipe by the pump truck
The water of volume, the annular space between the plugging tubing string and sleeve pipe is clamp-oned by the chemical plugging agent.
6. method according to claim 5, it is characterised in that described above to put forward the note chemical plugging agent envelope
After mouth tubing string, injecting water by the pump truck carries out anti-flushing well, including：
The note chemical plugging agent sealing tubing string is above carried, the note chemical plugging agent is sealed tubing string and is located at the closure
It is more than tubing string；
Annular space water filling between tubing string and described sleeve pipe is sealed to the note chemical plugging agent by the pump truck
Carry out anti-flushing well.
7. method according to claim 1, it is characterised in that the determination oil-water well middle sleeve is damaged
Improvement well section before, methods described also includes：
Drifting is carried out to the oil-water well by gauguste cutter.
8. method according to claim 1, it is characterised in that it is described in the improvement well section under enter
Before plugging tubing string, methods described also includes：
By full well section sleeve pipe more than casing scraper scraping red dog, the red dog is the upper end of the ash plug
Face.
9. method according to claim 4, it is characterised in that it is described by the pump truck to the ring
Injected after chemical plugging agent in shape space, methods described also includes：
The oil-water well preset duration to the chemical plugging agent is closed to solidify.
10. according to any described method of claim 1 to 9, it is characterised in that the chemical plugging agent is
Thermosetting resin.
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| CN201511032551.7A CN106930713B (en) | 2015-12-31 | 2015-12-31 | Casing pipe damage repairing method |
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| CN201511032551.7A CN106930713B (en) | 2015-12-31 | 2015-12-31 | Casing pipe damage repairing method |
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| CN106930713B CN106930713B (en) | 2020-05-08 |
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| CN108194045A (en) * | 2018-01-29 | 2018-06-22 | 韩雨桐 | A kind of casing repairing device |
| CN108204216A (en) * | 2018-01-29 | 2018-06-26 | 韩雨桐 | A kind of application method of casing repairing device |
| 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 |
| CN109611046A (en) * | 2018-03-12 | 2019-04-12 | 刘屹凡 | A kind of petroleum pipeline tool prosthetic device |
| CN110231436A (en) * | 2018-03-02 | 2019-09-13 | 中国石油天然气股份有限公司 | Set damage detection method |
| CN110725663A (en) * | 2019-11-06 | 2020-01-24 | 中国石油天然气股份有限公司 | Chemical plugging process for well without damage of fixed pipe column sleeve of bridge plug |
| 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 |
| CN113445960A (en) * | 2021-06-24 | 2021-09-28 | 中国石油天然气股份有限公司 | Water plugging method for oil well casing damage |
| CN113494267A (en) * | 2020-03-18 | 2021-10-12 | 中国石油化工股份有限公司 | Oil-gas-water well leak-point plugging operation method |
| CN114320202A (en) * | 2022-01-08 | 2022-04-12 | 江苏省地质调查研究院 | Well repairing device and well repairing method |
| CN114856472A (en) * | 2021-02-03 | 2022-08-05 | 中国石油天然气股份有限公司 | Casing pipe repairing method and casing pipe plugging tool |
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| CN108204216B (en) * | 2018-01-29 | 2020-06-30 | 通化石油工具股份有限公司 | Application method of casing pipe repairing device |
| CN108204216A (en) * | 2018-01-29 | 2018-06-26 | 韩雨桐 | A kind of application method of casing repairing device |
| CN108194045A (en) * | 2018-01-29 | 2018-06-22 | 韩雨桐 | A kind of casing repairing device |
| CN108194045B (en) * | 2018-01-29 | 2020-07-10 | 刘东章 | Sleeve pipe prosthetic devices |
| CN110231436A (en) * | 2018-03-02 | 2019-09-13 | 中国石油天然气股份有限公司 | Set damage detection method |
| CN109611046B (en) * | 2018-03-12 | 2021-04-06 | 东营市科创石油装备有限公司 | Petroleum pipe tool repairing device |
| CN109611046A (en) * | 2018-03-12 | 2019-04-12 | 刘屹凡 | A kind of petroleum pipeline tool prosthetic device |
| 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 |
| 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 |
| CN110725663A (en) * | 2019-11-06 | 2020-01-24 | 中国石油天然气股份有限公司 | Chemical plugging process for well without damage of fixed pipe column sleeve of bridge plug |
| CN110725663B (en) * | 2019-11-06 | 2022-02-01 | 中国石油天然气股份有限公司 | Chemical plugging process for well without damage of fixed pipe column sleeve of bridge plug |
| CN113494267A (en) * | 2020-03-18 | 2021-10-12 | 中国石油化工股份有限公司 | Oil-gas-water well leak-point plugging operation method |
| CN114856472A (en) * | 2021-02-03 | 2022-08-05 | 中国石油天然气股份有限公司 | Casing pipe repairing method and casing pipe plugging tool |
| CN113445960A (en) * | 2021-06-24 | 2021-09-28 | 中国石油天然气股份有限公司 | Water plugging method for oil well casing damage |
| CN114320202A (en) * | 2022-01-08 | 2022-04-12 | 江苏省地质调查研究院 | Well repairing device and well repairing method |
| CN114320202B (en) * | 2022-01-08 | 2022-07-01 | 江苏省地质调查研究院 | Well repairing device and well repairing method |
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