CN107542422A - The milling method and combined type junk mill and application method of different hole diameters - Google Patents

The milling method and combined type junk mill and application method of different hole diameters Download PDF

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Publication number
CN107542422A
CN107542422A CN201710694978.6A CN201710694978A CN107542422A CN 107542422 A CN107542422 A CN 107542422A CN 201710694978 A CN201710694978 A CN 201710694978A CN 107542422 A CN107542422 A CN 107542422A
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CN
China
Prior art keywords
milling
shoes
junk mill
piston
groove
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
Application number
CN201710694978.6A
Other languages
Chinese (zh)
Inventor
范玉斌
车登先
王梅
谢呈水
孙经光
陈宏志
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sinopec Oilfield Service Corp
Sinopec Shengli Petroleum Engineering Corp
Downhole Operation Co Sinopec of Shengli Petroleum Engineering Corp
Original Assignee
Sinopec Oilfield Service Corp
Sinopec Shengli Petroleum Engineering Corp
Downhole Operation Co Sinopec of Shengli Petroleum Engineering Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sinopec Oilfield Service Corp, Sinopec Shengli Petroleum Engineering Corp, Downhole Operation Co Sinopec of Shengli Petroleum Engineering Corp filed Critical Sinopec Oilfield Service Corp
Priority to CN201710694978.6A priority Critical patent/CN107542422A/en
Publication of CN107542422A publication Critical patent/CN107542422A/en
Pending legal-status Critical Current

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Abstract

Disclosed by the invention is the milling method and combined type junk mill and application method of different hole diameters, is constructed for underground work milling, the underground milling operation for the different hole diameters that are particularly suitable for use in.Combined type junk mill includes outer milling shoes, interior milling shoes are fixed on inside outer milling shoes by closing piece, piston is fixed in the inner chamber of interior milling shoes by cutting pin, and the external diameter of outer milling shoes is consistent with the cased borehole of large diameter section, and the external diameter of interior milling shoes is consistent with the cased borehole of small internal diameter.Reduce in different hole diameter Oil/gas Wells under milling needs drill string, the problem of time-consuming, efficiency is low twice.Effectively increase efficiency of construction and shorten the engineering time, significantly reduce production cost, there is good application effect and significant economic benefit.

Description

The milling method and combined type junk mill and application method of different hole diameters
Technical field
The present invention relates to the underground workover treatment instrument of petroleum industry, the milling method and combined type of particularly different hole diameters Junk mill and application method, constructed for underground work milling, the underground milling operation for the different hole diameters that are particularly suitable for use in.
Background technology
In deep-well, the ultradeep well more than 6000 meters, upper sleeve pit shaft is typically using the 9 of 4000m or so5/8Inch sleeve pipe, under Parts casing pipe pit shaft combines completion using the production casing of 2000 meters of 7 inch sleeve pipes.Packer card envelope is being carried out to this kind of Oil/gas Well In acid fracturing or sleeve pipe after packing measure operation, when taking out packer, the instrument such as bridging plug, rubber is run into sometimes come off and stay well Accident;Follow-up measure operation can be influenceed by falling well rubber, for coming off 95/8Rubber in inch sleeve pipe, such as direct tripping in are less than 7 The milling class instrument of inch casing inner diameter, 95/8When handling in inch sleeve pipe, rubber can be altered to above instrument, can not only be realized pair Effective processing of rubber, it there is also and carry drilling tool and hang tag phenomenon, or even cause lock of tool drilling.Therefore, at present to above-mentioned sleeve pipe The processing method of junk is in pit shaft:First by suitable for 95/8The major diameter milling class instrument of inch casing inner diameter is pushed into 7 Behind inch casing hanger position, act major diameter instrument;Tripping in is pushed into suitable for the milling class instrument of 7 inch casing inner diameters again Crushed behind shaft bottom.This, which just needs at least to remove drill string twice, could complete this milling work.
In addition, for the ultradeep well of this kind of sleeve combination completion, typically can be 9 in shut-in well5/8In inch sleeve pipe, 7 inch sleeve pipes The shut-in well mode for all squeezing into cement plug respectively is shunt in a well.When needing to exploit construction again, drill string twice is needed also exist for down, is carried out Milling, the brill miller that could complete two layers of cement plug of processing are made.
Traditional junk mill is straight-tube shape milling tool made of a kind of lower end welding hard alloy or high-abrasive material, conventional to grind The body diameter of footwear is constant, can only be used in the well of identical hole diameter, and when the progress milling work in the different well of hole diameter During industry, can only from well first go out the junk mill of major diameter after, then change the less junk mill of diameter and carry out milling operation, do not have also at present There is a kind of junk mill that milling operation can be carried out in different hole diameters.
Based on the reason for the above, production scene needs to develop a kind of combination milling class instrument, makes it 95/8Inch and 7 inch groups In trap pipe in processing well during junk, it can meet on top 95/8The requirement of processing in inch major diameter sleeve pipe, but also with handling During to 7 inch casing hanger position, the function of continuing with can be entered in 7 inch sleeve pipes, when can so increase substantially work Effect, mitigate operation labor intensity, reach the effect got twice the result with half the effort.
The content of the invention
It is an object of the invention to provide the milling method of different hole diameters and combined type junk mill and application method, solves tradition mill Footwear drill string, the problem of time-consuming, efficiency is low twice under milling construction needs in different hole diameter Oil/gas Wells, reduce removing for drill string Number, efficiency of construction is improved, reduce production cost.
To solve the above problems, what the present invention was realized in:
The milling method of different hole diameters is to fit together the junk mill of various outer diameter to form combined type junk mill, allows the mill of small external diameter Footwear are locked in by closing piece inside the junk mill of big external diameter, and piston is loaded inside the junk mill of small external diameter and cuts pin, by cutting Piston is fixed on inside the junk mill of small external diameter by disconnected pin;First with the cased borehole of the junk mill milling large diameter section of big external diameter, When entering the cased borehole of small internal diameter, piston is hit down and it is received closing piece, allows the junk mill of big external diameter to retreat to small external diameter Above junk mill, the small internal diameter cased borehole below the junk mill milling of small external diameter is used.
Combined type junk mill using the milling method of different hole diameters includes outer milling shoes, and interior milling shoes are fixed by closing piece Inside outer milling shoes, piston is fixed in the inner chamber of interior milling shoes by cutting pin, the external diameter and large diameter of outer milling shoes The cased borehole of section is consistent, and the external diameter of interior milling shoes is consistent with the cased borehole of small internal diameter.
For the construction method of combined type junk mill, it is:
A, first by the junk in outer milling shoes milling large diameter cased borehole;
B, before small internal diameter cased borehole is entered, from ground, input suppresses ball and hits piston down;
C, after piston falls into the bottom of interior milling shoes lumen, closing piece, which falls into closing piece and is located in groove, makes outer milling shoes unlock;
D, tubing string is transferred, outer milling shoes are in the tubing string above promotion lower slider to the interior milling shoes of small internal diameter cased borehole;
E, using the junk in the small internal diameter cased borehole of interior milling shoes milling.
Compared with prior art, remarkable result of the invention is:When this junk mill works, first by the outer mill of this junk mill Milling shoe milling in large diameter cased borehole, after completing milling in large diameter cased borehole, without pulling out of hole.Entering small internal diameter Before cased borehole, ball is suppressed toward input in drill string on ground, ball is suppressed and is sealed in piston tip, suppressing cutting cutting pin makes work Plug moves down;Outer milling shoes are active, can moved up with the top tubing string of interior milling shoes departing from the locking of closing piece, so as to Expose interior milling shoes, enter back into small internal diameter cased borehole, milling operation is carried out using interior milling shoes, so as to reach only next time The purpose of drill string, junk that can be in the cased borehole of milling different inner diameters or cement plug.So as to reduce in different hole diameter oil gas Drill string, the problem of time-consuming, efficiency is low twice under milling needs in well.When effectively increasing efficiency of construction and shortening construction Between, production cost is significantly reduced, there is good application effect and significant economic benefit.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 be in Fig. 1 A-A to the sectional view of section.
In figure:Interior milling shoes -1, sealing ring -2, outer milling shoes -3, piston -4, cut pin -5, closing piece -6, fixture block -7.
Embodiment
The present invention is described in detail below in conjunction with accompanying drawing, not limited the scope of the invention, all designs using the present invention are thought The improvement that rood goes out belongs to the protection category of the present invention.
The milling method of different hole diameters, it is to fit together the junk mill of various outer diameter to form combined type junk mill, allows small outer The junk mill in footpath is locked in by closing piece 6 inside the junk mill of big external diameter, and piston 4 is loaded inside the junk mill of small external diameter and cuts pin 5, piston 4 is fixed on inside the junk mill of small external diameter by cutting pin 5;First with the junk mill milling large diameter section of big external diameter Cased borehole, when entering the cased borehole of small internal diameter, piston 4 is hit down and it is received closing piece 6, allows the junk mill of big external diameter to move back To above the junk mill of small external diameter, the small internal diameter cased borehole below the junk mill milling of small external diameter is used.
Referring to Fig. 1 and Fig. 2, the combined type junk mill using the milling method of different hole diameters includes outer milling shoes 3, by interior milling Footwear 1 are fixed on the outer the inside of milling shoes 3 by closing piece 6, and piston 4 is fixed in the inner chamber of interior milling shoes 1 by cutting pin 5, outside The external diameter of milling shoes 3 is consistent with the cased borehole of large diameter section, and the external diameter of interior milling shoes 1 is consistent with the cased borehole of small internal diameter.
The inner chamber bottom of interior milling shoes 1 is provided with the hydrophthalmia water-carrying groove insertion cylindrical with bottom, lower end welding hard alloy Or high-abrasive material;The bottom of interior milling shoes 1 is cylindrical to be additionally provided with fixture block 7, and lockhole and shear pin hole are provided with the body of the top of fixture block 7, Closing piece 6 is respectively charged into the lockhole and shear pin hole and cuts pin 5, the top inner circle of interior milling shoes 1 is provided with threaded connection chamber And torus.
Be provided with circulation port in the upper body of piston 4, the circulation port after piston 4 is hit down with the circulation in interior milling shoes 1 Chamber is corresponding;The body of piston 4 is cylindrical to be located in groove provided with shear pin groove and closing piece, and closing piece is located in groove and is located at the upper of shear pin groove Portion.When piston 4 suppressed cut pin 5 it is descending after, suppress ball and plug central passage, because the external diameter for suppressing ball is small In the internal diameter of torus, now workover fluid can enter back into piston by the circulation port in the torus and piston 4 in interior milling shoes 1 4 centre bore, circulation flushing passage is formed down, direct circulation during milling can be kept to rinse.
The upper end of the piston 4 is provided with ball seat chamfering, cylindrical to be provided with three seals circle 2, when piston 4 is consolidated by cutting pin 5 After being scheduled in the inner chamber of interior milling shoes 1, sealing ring 2 can realize that the ball seat chamfering to piston 4, closing piece are located in groove, shear pin respectively The sealing of groove and closing piece 6.
The lower lumen of the outer milling shoes 3 is provided with fixture block mounting groove and fixture block exits groove, in the centre bore of outer milling shoes 3 Closing piece mounting groove is provided with hole wall, the closing piece mounting groove is that Baltimore groove is engaged with the shape of the built-in end of closing piece 6.
The fixture block mounting groove connects with fixture block exits groove, and fixture block mounting groove is circumferential slot, and fixture block exits groove is axial groove, with blocking Block mounting groove is vertical.Both facilitate the installation of interior milling shoes 1, be also convenient for exiting for outer milling shoes 3.Outer milling shoes 3 are real by closing piece 6 The now locking between interior milling shoes 1 on axial direction, the locking between interior milling shoes 1 radially is realized by fixture block 7.
For the construction method of combined type junk mill, it is:
A, first by the junk in the outer milling large diameter cased borehole of milling shoes 3;
B, before small internal diameter cased borehole is entered, from ground, input suppresses ball and hits piston 4 down;
C, after piston 4 falls into the bottom of the interior inner chamber of milling shoes 1, closing piece 6, which falls into closing piece and is located in groove, makes outer milling shoes 3 release lock It is fixed;
D, tubing string is transferred, outer milling shoes 3 are in the tubing string above promotion lower slider to the interior milling shoes 1 of small internal diameter cased borehole;
E, using the junk in the interior small internal diameter cased borehole of the milling of milling shoes 1.
During using milling of the present invention, according to underground work milling operation code, the screw thread this junk mill by interior milling shoes 1 Connecting cavity is lowered into the oil gas water well of different hole diameters after being connected from working string, is existed first by the outer milling shoes 3 of this junk mill Milling in the cased borehole of large diameter section in well, after completing milling in the cased borehole of large diameter section, without pulling out of hole.Entering Before the cased borehole of small internal diameter section, ball is suppressed toward input in working string in well head, it is setting on the top of piston 4 to suppress ball.Use The liquid that plunger pump squeezes into convenient pressure cuts pin 5, and piston 4 is displaced downwardly to the lower end of interior milling shoes 1.Now, on piston 4 The ball of suppressing of portion and its input is displaced downwardly in the torus of interior milling shoes 1, and the external diameter of ball is suppressed because the internal diameter of torus is more than, The workover fluid of top working string central passage is set to be connected by the circulation port on torus and piston 4 with this junk mill bottom, shape Into circulation flushing passage.Meanwhile piston 4 moves down the rear closing piece of itself and is located in the lucky position of face closing piece 6 of groove, now, It is further continued for transferring drill string, outer milling shoes 3 can move up in the presence of small internal diameter cased well barrel, and the inwall of outer milling shoes 3 promotes Closing piece 6 inside contracts, and outer milling shoes 3 depart from the locking of closing piece 6, are active, outer milling shoes 3 is moved up with drill string, exposes interior Milling shoes 1, and interior milling shoes 1 may proceed to enter in small internal diameter cased borehole and carry out milling operation, until milling operation is completed.
The embodiment described above is only exemplary embodiments, but the present invention is not limited only to these embodiments, this area Technical staff can make modification under without departing from the spirit of the present invention and enlightenment.Aspect disclosed herein there may be a lot Change, combination and modification, and be within, therefore, protection domain is not limited only to explanation above.

Claims (8)

1. it is to fit together the junk mill of various outer diameter to form combined type junk mill the milling method of different hole diameters, allows small external diameter Junk mill be locked in by closing piece inside the junk mill of big external diameter, piston is loaded inside the junk mill of small external diameter and cuts pin, is led to Cross and cut the junk mill the inside that piston is fixed on small external diameter by pin;First with the cased well of the junk mill milling large diameter section of big external diameter Cylinder, when entering the cased borehole of small internal diameter, piston is hit down and it is received closing piece, allows the junk mill of big external diameter to retreat to small external diameter Junk mill above, use the small internal diameter cased borehole below the junk mill milling of small external diameter.
2. usage right requires the combined type junk mill of the milling method of the 1 different hole diameters, including outer milling shoes, it is characterized in that, Interior milling shoes are fixed on inside outer milling shoes by closing piece, piston is fixed in the inner chamber of interior milling shoes by cutting pin, The external diameter of outer milling shoes is consistent with the cased borehole of large diameter section, and the external diameter of interior milling shoes is consistent with the cased borehole of small internal diameter.
3. the combined type junk mill of the milling method of different hole diameters as claimed in claim 2, it is characterized in that, in the interior milling shoes Chamber bottom is provided with the hydrophthalmia water-carrying groove insertion cylindrical with bottom, lower end welding hard alloy or high-abrasive material;Under interior milling shoes Portion is cylindrical to be additionally provided with fixture block, is provided with lockhole and shear pin hole in the body above fixture block, is respectively charged into the lockhole and shear pin hole Closing piece and cutting pin, the top inner circle of interior milling shoes are provided with threaded connection chamber and torus.
4. the combined type junk mill of the milling method of different hole diameters as claimed in claim 3, it is characterized in that, the upper piston area sheet Circulation port is provided with body, the circulation port is corresponding with the torus in interior milling shoes after piston is hit down;The sheet of piston is external Circle is located in groove provided with shear pin groove and closing piece, and closing piece is located in the top that groove is located at shear pin groove.
5. the combined type junk mill of the milling method of different hole diameters as claimed in claim 2 or claim 3, it is characterized in that, the piston Upper end is provided with ball seat chamfering, cylindrical to be provided with three seals circle, after piston is fixed in the inner chamber of interior milling shoes by cutting pin, Sealing ring can realize that the ball seat chamfering to piston, closing piece are located in the sealing of groove, shear pin groove and closing piece respectively.
6. the combined type junk mill of the milling method of different hole diameters as claimed in claim 2, it is characterized in that, the outer milling shoes Lower lumen is provided with fixture block mounting groove and fixture block exits groove, and closing piece mounting groove is provided with the centre bore hole wall of outer milling shoes, should Closing piece mounting groove is that Baltimore groove is engaged with the shape of closing piece built-in end.
7. the combined type junk mill of the milling method of different hole diameters as claimed in claim 6, it is characterized in that, the fixture block mounting groove Connected with fixture block exits groove, fixture block mounting groove is circumferential slot, and fixture block exits groove is axial groove, vertical with fixture block mounting groove.
8. for the construction method of the combined type junk mill described in claim 2, it is:
A, first by the junk in outer milling shoes milling large diameter cased borehole;
B, before small internal diameter cased borehole is entered, from ground, input suppresses ball and hits piston down;
C, after piston falls into the bottom of interior milling shoes lumen, closing piece, which falls into closing piece and is located in groove, makes outer milling shoes unlock;
D, tubing string is transferred, outer milling shoes are in the tubing string above promotion lower slider to the interior milling shoes of small internal diameter cased borehole;
E, using the junk in the small internal diameter cased borehole of interior milling shoes milling.
CN201710694978.6A 2017-08-15 2017-08-15 The milling method and combined type junk mill and application method of different hole diameters Pending CN107542422A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710694978.6A CN107542422A (en) 2017-08-15 2017-08-15 The milling method and combined type junk mill and application method of different hole diameters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710694978.6A CN107542422A (en) 2017-08-15 2017-08-15 The milling method and combined type junk mill and application method of different hole diameters

Publications (1)

Publication Number Publication Date
CN107542422A true CN107542422A (en) 2018-01-05

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Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113309480A (en) * 2021-07-29 2021-08-27 中国石油集团川庆钻探工程有限公司 Anti-sticking milling shoe and drilling, grinding and milling tool for coiled tubing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113309480A (en) * 2021-07-29 2021-08-27 中国石油集团川庆钻探工程有限公司 Anti-sticking milling shoe and drilling, grinding and milling tool for coiled tubing

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PB01 Publication
PB01 Publication
CB03 Change of inventor or designer information
CB03 Change of inventor or designer information

Inventor after: Fan Yubin

Inventor after: Xue Renjiang

Inventor after: Che Dengxian

Inventor after: Wang Mei

Inventor after: Xie Chengshui

Inventor after: Sun Jingguang

Inventor after: Chen Hongzhi

Inventor before: Fan Yubin

Inventor before: Che Dengxian

Inventor before: Wang Mei

Inventor before: Xie Chengshui

Inventor before: Sun Jingguang

Inventor before: Chen Hongzhi

SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination