CN109209273A - A method of replacement milling shoe - Google Patents
A method of replacement milling shoe Download PDFInfo
- Publication number
- CN109209273A CN109209273A CN201811186027.9A CN201811186027A CN109209273A CN 109209273 A CN109209273 A CN 109209273A CN 201811186027 A CN201811186027 A CN 201811186027A CN 109209273 A CN109209273 A CN 109209273A
- Authority
- CN
- China
- Prior art keywords
- drill rod
- rod assemblies
- milling shoe
- milled sleeve
- milled
- 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.)
- Pending
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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
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
Abstract
The present invention relates to oilfield exploitation technical field more particularly to a kind of methods for replacing milling shoe.This method passes through before acting milled sleeve, first enter drill rod assemblies in milled sleeve lowered inside, the front end of drill rod assemblies is disposed with packer, drill rod assemblies are fixed in flow string using packer, then milled sleeve is risen, after having replaced milling shoe, milled sleeve is socketed with the top of fish of flow string again under the guiding function of drill rod assemblies.Present invention ensures that milled sleeve top of fish of flow string during replacing milling shoe will not be lost, technical guarantee is provided for well construction.
Description
Technical field
The present invention relates to oilfield exploitation technical field more particularly to a kind of methods for replacing milling shoe.
Background technique
In oilfield development process, the broken of old well flow string is easily caused due to engineering construction and geological environment etc.
Split, burn into perforation etc., restore the normal production of old well by using set technology is taken in the prior art, it is so-called to take set skill
Art be taken out by relevant device it is remaining in the original production tubing string of spot failure or more, then the new flow string and pit shaft of tripping in
Original production tubing string carries out make-up or mends the technology connect.As shown in Figure 1, the above-mentioned set technology that takes is in the process for taking out original production tubing string
In, general first from the well head tripping in milled sleeve 4 of pit shaft, the bottom of milled sleeve 4 is fixedly installed with milling shoe 5, is milled by set
Shoes 5 are by 6 sets of mill ofves of cement sheath outside flow string 2, so that flow string 2 more than spot failure smoothly be taken out.
But the above-mentioned taking-up for taking set Technical comparing and being suitable for shallow-layer flow string, when the spot failure of flow string buries
When deeper, with the increasing of set milling depth, it can be produced between flow string and milled sleeve, between milled sleeve and wellbore when set mills
Raw huge spin friction, causes the torque of milled sleeve that cannot be transferred to well at the milling shoe of casing section mill bottom, influences
Set milling operation, results even in the deformation of milled sleeve or twists off, cause down-hole accident when serious.It is buried for above-mentioned spot failure
Deeper situation, generally takes cutting and takes out and covered the flow string milled out, but above-mentioned measure solve spin friction compared with
While big problem, the risk that the top of fish of flow string is easily lost is also resulted in, since the top of flow string is removed
A part, after milled sleeve takes out from pit shaft and replaces milling shoe, milled sleeve transfers again to underground and carries out set milling
In the process, the bottom port in milling pipe road is easy to not be socketed with the top of fish of flow string, even will cause pit shaft when serious
Scrap.
Summary of the invention
The purpose of the present invention is to provide a kind of methods for replacing milling shoe, work as flow string in the prior art for solving
The pipe section being located above is removed, and milled sleeve is transferred after replacing milling shoe again to being easy to cause in pit shaft production to manage
The technical issues of top of fish of column is lost.
To achieve the above object, the method for replacement milling shoe of the invention adopts the following technical scheme that:
The method of replacement milling shoe includes the following steps:
A, milled sleeve is suspended in pit shaft；
B, drill rod assemblies are transferred along the inner cavity of milled sleeve to pit shaft, until the front end of drill rod assemblies enters flow string
Top of fish, drill rod assemblies are fixed in the top of fish of flow string by the fixation device being mounted in drill rod assemblies；
C, it plays milled sleeve out and replaces milling shoe；
D, milled sleeve is transferred again, and is introduced the top of fish of flow string in milled sleeve using drill rod assemblies；
E, drill rod assemblies are salvaged.
The utility model has the advantages that by first arranging drill rod assemblies in flow string before acting milled sleeve in the present invention, by
Smaller in the diameter of drill rod assemblies, after the replacement of the milling shoe of milled sleeve, the front end of milled sleeve is in drill rod assemblies
It easily can be achieved with realizing with the top of fish part of flow string very much under guiding function and dock, the top of fish for avoiding flow string is lost
The case where mistake, and set milling efficiency is greatly improved.
Further, in above-mentioned steps c before acting milled sleeve, first by pithead position close in the drill rod assemblies
Drilling rod take out.It could facilitate after taking-up pithead position drilling rod and take out milled sleeve in the subsequent process.
It preferably, further include before drilling rod taking-up, to the fixation between drill rod assemblies and flow string in above-mentioned steps c
The testing experiment that effect is tested.Testing experiment is able to verify that the fixed effect of drill rod assemblies, avoids being removed and placed into set
During milling tubing string, drill rod assemblies are detached from there is a situation where being not fixed firmly.
Further, the testing experiment is using release drill rod assemblies and using the gravity of drill rod assemblies to drill rod assemblies
Fixed effect is tested.The test of fixed effect is directly realized using the gravity of drill rod assemblies, method is simple, convenient for operating,
And it can intuitively reflect fixed effect.
Preferably, the fixed device is the packer for being mounted on drill rod assemblies front end.
For the further improvement of the invention of above-mentioned replacement milling shoe, it is arranged in the drill rod assemblies and is milled for guide sleeves
The centralizer that tubing string falls.Centralizer can be stuck in the top of fish port of flow string, production pipe when milled sleeve is transferred again
Column top of fish can be introduced into milled sleeve under the action of centralizer.
Further, in above-mentioned steps a, milled sleeve is suspended on the preventer that pit shaft entrance is equipped with.
Preferably, the drill rod assemblies are made of slope drilling rod.Slope drilling rod can be suitable for inclined shaft and horizontal well, and
And can be avoided at tool joint step and the scraping of the borehole wall, reduce frictional resistance when drilling rod operation.
Detailed description of the invention
Fig. 1 is the schematic diagram that the present invention takes set technology in the prior art；
Fig. 2 is schematic diagram after the interception flow string of the embodiment 1 of the method for present invention replacement milling shoe；
Fig. 3 is schematic diagram after the packer set of the embodiment 1 of the method for present invention replacement milling shoe；
In figure: 1- surface pipe, 2- flow string, 3- drill bit wellbore, 4- milled sleeve, 5- milling shoe, 6- cement sheath, 7- can be fished out
Formula bridge plug, the artificial bottom of a well 8-, 9- drill rod assemblies, 10- centralizer, 11- anchor packer.
Specific embodiment
Embodiments of the present invention are described further with reference to the accompanying drawing.
The specific embodiment 1 of the method for replacement milling shoe of the invention:
As shown in Fig. 2 ~ 3, when oil field produces, it is mainly provided with flow string 2 in pit shaft and is set in the table in 2 outside of flow string
Layer casing 1, the bottom inside that flow string 2 is located in pit shaft are disposed with retrievable bridge plug 7, and the bottom of flow string 2 is artificial
The outside in shaft bottom 8, flow string 2 is cement sheath 6, and oil reservoir is distributed in the outside of cement sheath 6.
When the spot failure of flow string 2 buries deeper, milled sleeve 4 is due to too long and milled sleeve 4 and flow string 2
Between, between milled sleeve 4 and drill bit wellbore 3 frictional force increase, cause the torsional moment of milled sleeve 4 that cannot pass well
It is handed at milling shoe 5, needs in advance to take out the part that quilt cover has milled out of flow string 2 at this time, by the way that the life milled out will be covered
It produces tubing string 2 to cut off and take out, reduces the frictional force for needing to overcome when milled sleeve 4 reverses, but milled sleeve 4 is continuing to cover
When milling the cement sheath 6 in 2 outside of flow string and carrying out replacement milling shoe 5, milled sleeve 4 is in the process for being reentered into pit shaft
The middle front end that can there are problems that milled sleeve 4 and the top of fish of flow string 2 cannot be socketed well, at this time using following replacement
The method and step of milling shoe 5:
Milled sleeve 4 is suspended on first on the preventer of pit shaft pithead position.
Then it is put into pit shaft under the inner cavity by drill rod assemblies 9 along milled sleeve 4, the drill rod assemblies 9 include more piece
Drilling rod, drilling rod use slope drilling rod, and slope drilling rod can be suitable for inclined shaft and horizontal well, and can be avoided drilling rod connecting caster bed
It is hung at rank with the borehole wall, reduces drilling rod frictional resistance.Front end of the drill rod assemblies 9 in decentralization is disposed with packer, packer
Using Y211-114 or Y221-114 type anchor packer 11, centralizer 10 is arranged in drill rod assemblies 9, centralizer 10 is also arranged
In the position for leaning on front end close to drill rod assemblies 9.
When the front end of drill rod assemblies 9 enters in flow string 2, by above mention or rotary drill rod component 9 realize packing
The anchoring of slips and packer is setting in device.
Slowly drill rod assemblies 9 are discharged from pithead position, when suspending weight of the well head to drill rod assemblies 9 is reduced to zero load
When, illustrate the setting all right of downhole packer, packer can be worked normally, end of certificate packer set to be tested and anchor
After condition of pledging love, drill rod assemblies 9 are taken out close to the drilling rod of pit shaft pithead position, the drill rod assemblies of leaving at this time being retained in pit shaft
Why tail end (i.e. close to one end of well head) uses the arrangement of 2m apart from well head about 2m, is in order to not influence set milling
The normal operation of tubing string 4, while being also conducive to the salvaging after the replacement milling shoe 5 of milled sleeve 4 to drill rod assemblies are left.
Milled sleeve 4 is risen out by ground instrument, milling shoe 5 is replaced；Then milling pipe replacement finished
Column 4 is transferred again, when milled sleeve 4 decentralization to it is above-mentioned leave drill rod assemblies end-position when, since the drilling rod of drill rod assemblies 9 is straight
Diameter is smaller, and milled sleeve 4 is easy to be set in the outside for leaving drill rod assemblies, to milled sleeve 4 along leave drill rod assemblies after
Continuous downlink realizes end nozzle and the life of milled sleeve 4 until when arriving at the position of centralizer 10 under the action of centralizer 10
The alignment of the top of fish of tubing string 2 being produced, then slowly decentralization milled sleeve 4, the top of fish of flow string 2 is set in milled sleeve 4,
To realize docking for milled sleeve 4 and flow string 2.
After the completion of above-mentioned milled sleeve 4 is docked with flow string 2, milled sleeve 4 is suspended on pit shaft well head again
On preventer, then tripping in fishing tool will leave drill rod assemblies and salvage well, and packer above mentions work in drill rod assemblies 9 at this time
It is unsealed under and is acted pit shaft together with drill rod assemblies 9.
Again milled sleeve 4 and ground supporting tool are attached, continue set and mills operation, until set is milled to production
At the spot failure position of tubing string 2.
In other embodiments, packer is other kinds of anchor packer；The number of centralizer can be according to reality
Situation is adjusted, and each centralizer, which is spaced a distance, to be fixed in drill rod assemblies.
Claims (8)
1. the method for replacing milling shoe, which comprises the steps of:
A, milled sleeve is suspended in pit shaft；
B, drill rod assemblies are transferred along the inner cavity of milled sleeve to pit shaft, until the front end of drill rod assemblies enters flow string
Top of fish, drill rod assemblies are fixed in the top of fish of flow string by the fixation device being mounted in drill rod assemblies；
C, it plays milled sleeve out and replaces milling shoe；
D, milled sleeve is transferred again, and is introduced the top of fish of flow string in milled sleeve using drill rod assemblies；
E, drill rod assemblies are salvaged.
2. the method for replacement milling shoe according to claim 1, which is characterized in that acting milling pipe in above-mentioned steps c
Before column, it will first be taken out in the drill rod assemblies close to the drilling rod of pithead position.
3. the method for replacement milling shoe according to claim 2, which is characterized in that further include in drilling rod in above-mentioned steps c
Before taking-up, testing experiment that the fixed effect between drill rod assemblies and flow string is tested.
4. the method for replacement milling shoe according to claim 3, which is characterized in that the testing experiment is using release drilling rod
Component is simultaneously tested using fixed effect of the gravity of drill rod assemblies to drill rod assemblies.
5. the method for milling shoe is replaced described in any one of -4 according to claim 1, which is characterized in that the fixed device is
It is mounted on the packer of drill rod assemblies front end.
6. the method for replacement milling shoe according to claim 5, which is characterized in that be arranged with and be used in the drill rod assemblies
The centralizer for guiding milled sleeve to fall.
7. the method for milling shoe is replaced described in any one of -4 according to claim 1, which is characterized in that in above-mentioned steps a, institute
Milled sleeve is stated to be suspended on the preventer that pit shaft entrance is equipped with.
8. according to claim 1 described in any one of -4 replace milling shoe method, which is characterized in that the drill rod assemblies by
Slope drilling rod composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811186027.9A CN109209273A (en) | 2018-10-11 | 2018-10-11 | A method of replacement milling shoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811186027.9A CN109209273A (en) | 2018-10-11 | 2018-10-11 | A method of replacement milling shoe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109209273A true CN109209273A (en) | 2019-01-15 |
Family
ID=64980149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811186027.9A Pending CN109209273A (en) | 2018-10-11 | 2018-10-11 | A method of replacement milling shoe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109209273A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135247A (en) * | 2021-12-10 | 2022-03-04 | 中国石油化工股份有限公司 | Auxiliary device and method for developing well mouth heightening |
Citations (5)
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|---|---|---|---|---|
| US6230806B1 (en) * | 1997-12-04 | 2001-05-15 | Halliburton Energy Services, Inc. | Apparatus and methods for locating tools in subterranean wells |
| CN201874483U (en) * | 2010-12-07 | 2011-06-22 | 中国石油集团西部钻探工程有限公司 | Combining tool for starter joint |
| CN202510076U (en) * | 2012-03-31 | 2012-10-31 | 中国石油天然气集团公司 | Leader pin cap |
| CN202560204U (en) * | 2012-04-11 | 2012-11-28 | 中国石油天然气集团公司 | Primer lead mold |
| CN205558850U (en) * | 2016-02-23 | 2016-09-07 | 中国石油集团渤海钻探工程有限公司 | Cover mills section of thick bamboo reentry and uses sleeve pipe guide structure |
-
2018
- 2018-10-11 CN CN201811186027.9A patent/CN109209273A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6230806B1 (en) * | 1997-12-04 | 2001-05-15 | Halliburton Energy Services, Inc. | Apparatus and methods for locating tools in subterranean wells |
| CN201874483U (en) * | 2010-12-07 | 2011-06-22 | 中国石油集团西部钻探工程有限公司 | Combining tool for starter joint |
| CN202510076U (en) * | 2012-03-31 | 2012-10-31 | 中国石油天然气集团公司 | Leader pin cap |
| CN202560204U (en) * | 2012-04-11 | 2012-11-28 | 中国石油天然气集团公司 | Primer lead mold |
| CN205558850U (en) * | 2016-02-23 | 2016-09-07 | 中国石油集团渤海钻探工程有限公司 | Cover mills section of thick bamboo reentry and uses sleeve pipe guide structure |
Non-Patent Citations (2)
| Title |
|---|
| 张高峰等: "大港油田裸眼井取换套技术现状及对策", 《石油地质与工程》 * |
| 胡博仲: "《油水井大修工艺技术》", 31 March 1998, 石油工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135247A (en) * | 2021-12-10 | 2022-03-04 | 中国石油化工股份有限公司 | Auxiliary device and method for developing well mouth heightening |
| CN114135247B (en) * | 2021-12-10 | 2024-02-02 | 中国石油化工股份有限公司 | Auxiliary device and method for developing well head heightening |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20190115 |