CN107762443A - Well repairing device and method for well fixing - Google Patents
Well repairing device and method for well fixing Download PDFInfo
- Publication number
- CN107762443A CN107762443A CN201610685655.6A CN201610685655A CN107762443A CN 107762443 A CN107762443 A CN 107762443A CN 201610685655 A CN201610685655 A CN 201610685655A CN 107762443 A CN107762443 A CN 107762443A
- Authority
- CN
- China
- Prior art keywords
- well
- hole
- repairing device
- cylindrical body
- hand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/124—Units with longitudinally-spaced plugs for isolating the intermediate space
Abstract
The present invention relates to well repairing device and method for well fixing.Include the cylindrical body of insertion according to the well repairing device of the present invention, at least two packers are axially provided with the outside of cylindrical body, interval is provided between adjacent packer, it is slidably mounted at the interior ascending pipe of the inside of cylindrical body, the upper end of interior ascending pipe be open wide, the lower end of inside in cylindrical body is closing, outlet opening is also configured with the side wall of interior ascending pipe, being provided with the region in interval of cylindrical body can be with the hand-hole of outlet opening thereof.The channeling across tube problem of oil well, gas well can be not only repaired using the well repairing device of the present invention, and division operation need not be bored after well workover completion.
Description
Technical field
The present invention relates to oil exploration and development fields, more particularly to a kind of well repairing device.The invention further relates to use this hair
The method that bright well repairing device carries out well workover.
Background technology
After down-hole casing in oil well or gas well is cemented the well and produced, due to the original such as cementing quality and complex formation situation
Cause, it is very easy to cause the cementing concrete ring between sleeve pipe and the borehole wall that partial destruction occurs, so as to cause to cover outside tube water, has channeling stream
The problems such as, this can greatly reduce the Production Life of Oil/gas Well, and cause keep the safety in production hidden danger and operating risk.
At present, for this channeling across tube the problem of, the most frequently used method for well fixing are：The tripping in bottom packer into sleeve pipe
The position below layer position gone wrong to sleeve pipe.Then, tripping in well repairing device (such as bridging plug) and water is injected into sleeve pipe
Mud, blocking agent etc. are to carry out workover treatment., it is necessary to the bridge that will be used during bottom packer and well workover after workover treatment terminates
The brills such as plug remove, and to cause sleeve pipe to penetrate, are easy to subsequently continue to produce.However, in division operation is bored, in this case it is still possible to destroy again
Cementing concrete ring simultaneously causes well workover unsuccessful.
The content of the invention
In view of the above-mentioned problems, the present invention proposes a kind of well repairing device.It can not only be repaiied using the well repairing device of the present invention
Multiple oil well, the channeling across tube problem of gas well, and without boring plug operation after well workover completion.The invention also provides use this
The method that the well repairing device of invention carries out well workover.
Well repairing device according to a first aspect of the present invention includes：The cylindrical body of insertion, the axle on the outside of cylindrical body
Ground is provided with least two packers, interval is provided between adjacent packer, is slidably mounted at the interior of cylindrical body
The interior ascending pipe in portion, the upper end of interior ascending pipe is unlimited, and the lower end of the inside in cylindrical body is closing, in interior ascending pipe
Outlet opening is also configured with side wall, being provided with the region in interval of cylindrical body can be with the injection of outlet opening thereof
Hole.
When using according to well repairing device of the invention, the inside injection blocking agent of inside ascending pipe.Blocking agent through outlet opening and
Hand-hole flows out, and is then flowed into destroyed cementing concrete ring, solidifies again, so as to realize well workover.Particularly, interior injection
The lower end of pipe for closing, therefore inside ascending pipe inside injection blocking agent before, without into sleeve pipe put into bottom packer,
Bridging plug, insertion pipe packer etc. block device.After well workover terminates, directly interior ascending pipe can be proposed to outside well, so as to easily
Inside pipe casing is kept unimpeded, fill in operation without boring.Thus, during whole well workover, completely eliminate brill plug operation and bring
The possibility for destroying cementing concrete ring or miscellaneous part again.
In one embodiment, interior ascending pipe upper area be configured with it is upper along the spacing knot that matches with cylindrical body
Structure, the distance at the center of position limiting structure to outlet opening are equal with the distance at upper edge to the center of hand-hole of cylindrical body.Pass through
Position limiting structure is set, it is ensured that the outlet opening of interior ascending pipe remains with the hand-hole of cylindrical body to align, such repairing
Blocking agent can is swimmingly injected into opening position to be repaired during well, ensure that the smooth progress of work-over operation.In addition, spacing knot
Structure also causes the upper area of interior ascending pipe to be maintained at outside cylindrical body, and this is very easy to ascending pipe in follow-up propose.
In one embodiment, the size of outlet opening is more than the size of hand-hole.So, though outlet opening, position limiting structure,
And the position of hand-hole can slightly deviation, also ensure that outlet opening aligns and connected with hand-hole.This is greatly reduced
Machining difficulty.
In one embodiment, hand-hole is corresponded in the outside of cylindrical body and the list for making hand-hole outwards turn on is installed
To valve.In operation, when the pressure of the fluid (for example, blocking agent) in cylindrical body or interior ascending pipe is sufficiently large, check valve meeting
Open so that fluid (for example, blocking agent) is flowed out to outside well repairing device.It is single when the pressure of the blocking agent in interior ascending pipe is smaller
It can be closed to valve, avoid cylindrical body or interior ascending pipe that mass exchange occurs with the environment outside sleeve pipe.So, inwardly note is being stopped
Enter in pipe after injection blocking agent, in the presence of check valve, the material reflux outside sleeve pipe can be automatically prevented in well repairing device, it is ensured that
Well-repairing work can be smoothed out.
In one embodiment, check valve includes the housing being fixedly linked with the outer wall of cylindrical body, is constructed in housing
There is the runner connected with hand-hole, the plug of Self-plugging runner is installed in runner.In a preferred embodiment, runner
The diameter of start-up portion be less than the diameter of exit portion, formed with limited step between start-up portion and exit portion, block up
Head is in sealing contact with limited step by spring.By this structure, the pressure outside sleeve pipe is bigger, and the runner of check valve is hermetically
It is closer, it is more conducive to ensure being smoothed out for well-repairing work.In addition, spring enables plug to be moved automatically in runner,
Artificial remotely controlling is avoided, this has been also convenient for work-over operation.
In a preferred embodiment, plug includes head, and head includes the central part of the start-up portion of closure runner
With the edge of the exit portion sliding contact with runner, axial through hole is configured between central part and edge.Head
The cooperation at edge and runner, it is ensured that plug can stably slide in runner.Through hole is then used for when head and limited step point
Allowed fluid flow after opening, thus fluid will not flow through from the gap between the edge on head and runner.So, fluid is avoided
Abrasion to head edge and runner, so as to ensure that slip that plug can be stable in runner.
In one embodiment, plug also includes the push rod that is connected with head, and push rod deviates through hole.Preferably, spring with
Push rod is connected.
According to the second aspect of the invention, it is proposed that the method that well workover is carried out using well repairing device described above, including
Following steps：
Step 1, corresponding to the stratum that channelling occurs outside sleeve pipe, perforation is carried out to sleeve pipe,
Step 2, by well repairing device tripping in sleeve pipe, interval covers the perforation area of sleeve pipe, and makes packer and sleeve pipe
It is in sealing contact,
Step 3, injection blocking agent is simultaneously pressurizeed in inside ascending pipe so that blocking agent through outlet opening, hand-hole and formation in sleeve pipe
On hole flow out to outside sleeve pipe,
Step 4, after well workover terminates, interior ascending pipe is proposed to outside well.
It is in order that inside pipe casing connects with cementing concrete ring to be repaired to well-case perforating.So, blocking agent just can be from
It is flowed into inside the well repairing device being lowered into sleeve pipe at cementing concrete ring to be repaired, so as to realize well workover.In whole well workover
During, completely dispense with that inside pipe casing bore and remove operation, so as to avoid secondary destruction caused by brill division operation possibility.
In a preferred embodiment, between step 3 and step 4, also with additional step：Injection blocking agent terminates
Afterwards, will be proposed on interior ascending pipe to outside cylindrical body, and from sleeve pipe injected clear water to carry out anti-flushing well.
Compared with prior art, the advantage of the invention is that：Can be with repairing casing using the well repairing device according to the present invention
Water, the air-flow that outer cementing concrete ring is destroyed and occurs alter problem.Particularly, during reparation and after reparation, filled in without boring
Operation, completely eliminate and bore the possibility that plug operation destroys cementing concrete ring or miscellaneous part again.
Brief description of the drawings
The invention will be described in more detail below based on embodiments and refering to the accompanying drawings.Wherein：
Fig. 1 schematically shows the well repairing device according to the present invention.
Fig. 2 schematically shows the first state figure of the check valve according to the present invention.
Fig. 3 schematically shows the second state diagram of the check valve according to the present invention.
In the accompanying drawings, identical part uses identical reference.Accompanying drawing is not according to the ratio of reality.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 schematically shows the structure of the well repairing device 100 according to the present invention.As shown in figure 1, well repairing device 100
Cylindrical body 4 including insertion.Interior ascending pipe 2 is installed in the internal slide of cylindrical body 4, in the outside of cylindrical body 4
On be axially provided with packer, such as packer 5 and packer 10.It is interval 12 between packer 5 and packer 10.Should
It is noted that cylindrical body 4, the external diameter together with packer 5 and packer 10 should be less than the internal diameter of sleeve pipe 13, will could so repair
Well device 100 is successfully lowered into the inside of sleeve pipe 13.Packer 5 and packer 10 are structures well-known to those having ordinary skill in the art
Part, repeat no more here.
The lower end 14 of interior ascending pipe 2 is closing, and upper end 15 is unlimited.See on the whole, interior ascending pipe 2 be one end closing,
The long tube of open at one end.Outlet opening 9 is also configured with the side wall of interior ascending pipe 2.In the side wall of cylindrical body 4, it is being spaced
The hand-hole 8 connected with outlet opening 9 is provided with 12.
In well workover, first correspond to, in the stratum 16 that channelling occurs outside sleeve pipe 13, carry out perforation to sleeve pipe 13 and formed and penetrated
Porose area 11, by the environmental communication in stratum 16 and sleeve pipe 13.Then, well repairing device 100 is lowered into sleeve pipe 13 and arrives perforation area
At 11.Interval 12 between packer 5 and packer 10 completely covers perforation area 11, and packer 5 and packer 10 with
Sleeve pipe 13 is in close contact.This way it is possible to avoid during well workover, blocking agent or other Substances Pollutions or destruction penetrating in sleeve pipe 13
Part outside porose area 11.Next, outlet opening 9 is connected with hand-hole 8, blocking agent is then injected in inside ascending pipe 2.Blocking agent
It is flowed into through outlet opening 9, hand-hole 8 and perforation area 13 in stratum 16, so as to realize well workover.After well workover terminates, by interior injection
Pipe 2 proposes outer to well.
In one embodiment, joint 1 is also configured with the upper edge of interior ascending pipe 2, in order to propose interior ascending pipe 2.
During blocking agent is injected, in order to ensure that outlet opening 9 and hand-hole 8 keep connecting, on the top of interior ascending pipe 2
Region 18 is configured with the position limiting structure 3 projected radially outward, and the position limiting structure 3 matches with cylindrical body 4 along 19.In addition,
Position limiting structure 3 to the center of outlet opening 9 distance L1 with cylindrical body 4 along 19 to hand-hole 8 centers distance L2 phases
Deng.So, position limiting structure 3 be supported on cylindrical body 4 on along 19 when, outlet opening 9 and hand-hole 8 are just necessarily to connect.
In one preferred embodiment, the size of outlet opening 9 is more than the size of hand-hole 8.So, even if distance L1 and distance L2 ratio marks
Accurate slightly deviation, outlet opening 9 still can be made to keep connecting (as shown in Figure 1) with hand-hole 8, it is difficult this greatly reduces machining
Degree, and improve yield rate.
After stopping injecting blocking agent, in order to avoid be injected into blocking agent is backflowed into interior ascending pipe 2, in one embodiment
In, can be configured to hand-hole 8 can on or off.As illustrated in fig. 1 and 2, it is provided with and injects in the outside of cylindrical body 4
Check valve 7 corresponding to hole 8.
In the embodiment shown in Figure 2, check valve 7 includes housing 76, the construction being fixedly linked with the outer wall of cylindrical body 4
Runner 77 in housing 76 and the self-sealing plug 71 in runner 77.Runner 77 connects with hand-hole 8, and including
The less start-up portion 75 of diameter and the exit portion 72 being relatively large in diameter.Formd between start-up portion 75 and exit portion 72
Limited step 78.Plug 71 is in sealing contact by spring 73 and limited step 78, so as to realize closure or conducting runner 77.
Also as shown in Fig. 2 plug 71 includes head 81 and push rod 82, spring 73 is wrapped on push rod 82.Head 81 includes
Block the central part 83 of the start-up portion 75 of runner 77 and the edge 84 with the sliding contact of exit portion 72 of runner 77.At center
Axial through hole 74 is configured between portion 83 and edge 84.It should be noted that push rod 82 deviates through hole 74.
Under initial state, in the presence of spring 73, central part 83 is in close contact with limited step 78, and through hole 74 is not
Start-up portion 75 and exit portion 72 can be turned on, i.e., runner 77 is in the state (as shown in Figure 2) blocked.When inside injection
When blocking agent is injected in pipe 2 and being pressurizeed, when the pressure from start-up portion 75 (or interior ascending pipe 2) is enough to promote the motion of plug 71,
Spring 73 is compressed, and central part 83 separates with limited step 78.At this moment, blocking agent will be from the start-up portion 75 of runner 77 through insertion
Hole 74 flows to exit portion 72, and then flows out to outside well repairing device 100 (as shown in Figure 3).As described above, blocking agent can be through set
Perforation area 11 on pipe 13 is flowed into stratum 16 to repair destroyed well cementation ring.It follows that blocking agent does not flow through head
Gap between 81 edge 84 and runner 77.In fact, the cooperation between edge 84 and runner 77 is only used for enabling plug 71
Stably slided in runner 77.This avoids damage edge 84 and runner 77, helps to ensure that plug 71 in runner 77
Stable sliding.In a preferred embodiment, the quantity of through hole 74 can be multiple, and be uniformly distributed in the circumferential.
Although by reference to preferred embodiment, invention has been described, is not departing from the situation of the scope of the present invention
Under, various improvement can be carried out to it and part therein can be replaced with equivalent.Especially, as long as being rushed in the absence of structure
Prominent, the every technical characteristic being previously mentioned in each embodiment can combine in any way.The invention is not limited in text
Disclosed in specific embodiment, but all technical schemes including falling within the scope of the appended claims.
Claims (10)
1. well repairing device, including：
The cylindrical body of insertion, at least two packers are axially provided with the outside of the cylindrical body, adjacent
Interval is provided between packer,
Installed in the interior ascending pipe of the inside of the cylindrical body, the upper end of the interior ascending pipe is unlimited, place for slidingtype insertion
It is closing in the lower end of the inside of the cylindrical body, outlet opening is also configured with the side wall of the interior ascending pipe,
Being provided with the region in the interval of the cylindrical body can be with the hand-hole of the outlet opening thereof.
2. well repairing device according to claim 1, it is characterised in that the upper area of the interior ascending pipe be configured with
The upper position limiting structure along matching of the cylindrical body, distance and the cylinder of the position limiting structure to the center of the outlet opening
The distance at upper edge to the center of the hand-hole of shape main body is equal.
3. well repairing device according to claim 1 or 2, it is characterised in that correspond to institute in the outside of the cylindrical body
State hand-hole and the check valve for making hand-hole outwards turn on is installed.
4. well repairing device according to claim 3, it is characterised in that the check valve includes outer with the cylindrical body
The housing that wall is fixedly linked, the runner connected with the hand-hole is configured with the housing, is provided with the runner
The plug of runner described in Self-plugging.
5. well repairing device according to claim 4, it is characterised in that the diameter of the start-up portion of the runner is less than outlet
Partial diameter, formed with limited step between the start-up portion and exit portion, the plug by spring with it is described
Limited step is in sealing contact.
6. well repairing device according to claim 5, it is characterised in that the plug includes head, and the head includes envelope
The central part of the start-up portion of the runner and the edge with the exit portion sliding contact of the runner are blocked up, in the central part
Axial through hole is configured between the edge.
7. well repairing device according to claim 6, it is characterised in that the plug also includes being connected with the head pushing away
Bar, the push rod deviate the through hole.
8. well repairing device according to claim 7, it is characterised in that the spring is connected with the push rod.
9. the well repairing device according to any one of claim 1 to 8, it is characterised in that the size of the outlet opening is more than
The size of the hand-hole.
10. carrying out the method for well workover using the well repairing device according to any one of claim 1 to 9, comprise the following steps：
Step 1, corresponding to the stratum that channelling occurs outside sleeve pipe, perforation is carried out to described sleeve pipe,
Step 2, by the well repairing device tripping in described sleeve pipe, the interval covers the perforation area of described sleeve pipe, and makes
The packer and described sleeve pipe are in sealing contact,
Step 3, the outlet opening is connected with hand-hole, blocking agent is injected into the interior ascending pipe and is pressurizeed, so that described stifled
Agent is flowed out to outside described sleeve pipe through the hole of the outlet opening, hand-hole and formation on sleeve pipe,
Step 4, after well-flushing terminates to well workover process, the interior ascending pipe is proposed to outside well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610685655.6A CN107762443B (en) | 2016-08-18 | 2016-08-18 | Well workover device and well workover method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610685655.6A CN107762443B (en) | 2016-08-18 | 2016-08-18 | Well workover device and well workover method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107762443A true CN107762443A (en) | 2018-03-06 |
| CN107762443B CN107762443B (en) | 2019-12-24 |
Family
ID=61262501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610685655.6A Active CN107762443B (en) | 2016-08-18 | 2016-08-18 | Well workover device and well workover method |
Country Status (1)
| Country | Link |
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| CN (1) | CN107762443B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798579A (en) * | 2018-08-21 | 2018-11-13 | 陕西延长石油(集团)有限责任公司研究院 | A kind of casing repairing strengthening agent constructing device and its application method |
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| US20050061506A1 (en) * | 2000-03-02 | 2005-03-24 | Schlumberger Technology Corporation | Well Treatment System and Method |
| CN101358513A (en) * | 2008-07-08 | 2009-02-04 | 东营市祥生工贸有限责任公司 | Water injection packer |
| CN201991483U (en) * | 2011-02-28 | 2011-09-28 | 中国石油集团川庆钻探工程有限公司 | Pipe column structure suitable for laminated sand fracturing of packer |
| CN104481432A (en) * | 2014-11-24 | 2015-04-01 | 中国石油天然气股份有限公司 | Sand washing pipe column for low-pressure absorption well and sand washing method |
| CN105587286A (en) * | 2014-10-23 | 2016-05-18 | 中国石油化工股份有限公司 | Anti-losing well-flushing packer |
| CN105612308A (en) * | 2013-10-09 | 2016-05-25 | 国际壳牌研究有限公司 | Riserless completions |
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2016
- 2016-08-18 CN CN201610685655.6A patent/CN107762443B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050061506A1 (en) * | 2000-03-02 | 2005-03-24 | Schlumberger Technology Corporation | Well Treatment System and Method |
| CN101358513A (en) * | 2008-07-08 | 2009-02-04 | 东营市祥生工贸有限责任公司 | Water injection packer |
| CN201991483U (en) * | 2011-02-28 | 2011-09-28 | 中国石油集团川庆钻探工程有限公司 | Pipe column structure suitable for laminated sand fracturing of packer |
| CN105612308A (en) * | 2013-10-09 | 2016-05-25 | 国际壳牌研究有限公司 | Riserless completions |
| CN105587286A (en) * | 2014-10-23 | 2016-05-18 | 中国石油化工股份有限公司 | Anti-losing well-flushing packer |
| CN104481432A (en) * | 2014-11-24 | 2015-04-01 | 中国石油天然气股份有限公司 | Sand washing pipe column for low-pressure absorption well and sand washing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108798579A (en) * | 2018-08-21 | 2018-11-13 | 陕西延长石油(集团)有限责任公司研究院 | A kind of casing repairing strengthening agent constructing device and its application method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107762443B (en) | 2019-12-24 |
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