CN110374536A - A kind of casing firing milling tool - Google Patents
A kind of casing firing milling tool Download PDFInfo
- Publication number
- CN110374536A CN110374536A CN201910735057.9A CN201910735057A CN110374536A CN 110374536 A CN110374536 A CN 110374536A CN 201910735057 A CN201910735057 A CN 201910735057A CN 110374536 A CN110374536 A CN 110374536A
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- CN
- China
- Prior art keywords
- cutter blade
- forging
- casing
- hydraulic piston
- forging cutter
- 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
- 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
- E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
- E21B29/005—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe with a radially-expansible cutter rotating inside the pipe, e.g. for cutting an annular window
Abstract
The invention discloses a kind of casing firing milling tools, including cylinder, current limliting plug, retaining ring, overcurrent ring, hydraulic piston, mandrel, forging cutter blade and stop collar；Current limliting plug, retaining ring, overcurrent ring, hydraulic piston, mandrel, forging cutter blade and stop collar are sequentially arranged at inner barrel to lower contact direction along top connection；The tool transfers to predetermined position, turntable drives its rotation and slush pump driving mud enters inside it, mud generates pressure when flowing through the nozzle on hydraulic piston, under the promotion of the pressure, hydraulic piston downlink, mandrel downlink, it pushes and is opened outside forging cutter blade, it forges cutter blade and cross force and then Casing-Cutting is generated to casing wall, after casing cutting, forging cutter blade gradually reaches maximum defined position for outer, decentralization drilling tool applies bit pressure progress casing firing milling construction at this time, after the completion of construction, first stop slush pump after pressure drop disappearance, piston reset, forging cutter blade is recovered in cutter groove, it is then turned off turntable, carry out trip-out operation.The configuration of the present invention is simple, it is high-efficient.
Description
Technical field
The present invention relates to boring tool technical field, more particularly to a kind of casing firing milling tool.
Background technique
With deepening continuously for oil field development, in order to control cost, investment reduction is improved benefit, casing window sidetracking skill
Art is widely used.Currently, there are mainly two types of casing window sidetrackings: one is mill one section of casing, mud of fetching water using forging milling device forging
Fill in sidetracking；Another kind is to be opened a window using tripping in earth anchor-whipstock with duplex milling wimble.Secondly, for effective protection natural resources and light
Water layer, while formation fluid being prevented to migrate in well, during oil-gas exploration and development, usually there are some wells (to handle waste water
Well, injection-production well and dry-well etc.) it needs to carry out permanently to scrap processing or the closure operation to its part well section, i.e., it is appropriate in well
Position cementing plug or sit bridge plug prevent fluid migration, to reach effective closure, and prevent annular space blowby, this is just needed portion
Casing firing milling is divided to fall, by cementing blocks again after annular space exposure.
But existing casing firing milling tool, on the one hand, structure is complicated, milling low efficiency；On the other hand, tool easily blocks
Cutter hub, service life are short.
Therefore it provides a kind of simple, easy to use, the efficient casing firing milling tool of structure be those skilled in the art urgently
Problem to be solved.
Summary of the invention
In view of this, the present invention provides a kind of casing firing milling tools, it is intended to solve existing skill at least to a certain extent
One of above-mentioned technical problem in art.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of casing firing milling tool, including cylinder, the cylinder have top connection and lower contact, the top connection and drill collar
Connection, the lower contact are connect with junk mill or drill bit, further include current limliting plug, retaining ring, overcurrent ring, hydraulic piston, mandrel, forging milling cutter
Piece and stop collar；
The current limliting plug, the retaining ring, the overcurrent ring, the hydraulic piston, the mandrel, the forging cutter blade and institute
It states stop collar and is sequentially arranged at the inner barrel to the lower contact direction along the top connection；
The current limliting plug is connected as one by the retaining ring and the overcurrent ring, and the current limliting offers aperture beyond the Great Wall,
The inner barrel offers hydrophthalmia channel, and the aperture is connected to by the hydrophthalmia channel with the lower contact；
The hydraulic piston is connect with the mandrel thread, and nozzle is offered on the hydraulic piston periphery, described small
Hole is connected to the nozzle；
The forging cutter blade is mounted on the inner barrel, and the longitudinal direction opened up with the barrel outer surface by fixed pin
Hole site is corresponding；The knife spine inclined-plane and the mandrel of the forging cutter blade are far from the overcurrent ring end thereof contacts；The forging milling
There is blade limited block on blade；
The stop collar is mounted on the forging cutter blade close to the lower section of described fixed pin one end, and the inner barrel has
Shoulder is limited, the stop collar is corresponding with the limit shoulder.
Further, the forging cutter blade quantity is six, and six forging cutter blades are circumferentially equidistantly mounted on institute
Inner barrel is stated, the opening pressure of the forging cutter blade of symmetrical two is identical.
It further, further include pressure regulation bar, the pressure regulation bar is mounted on the forging cutter blade far from the fixed pin side.
It further, further include spring, the spring is connect for the hydraulic piston with described hydraulic piston one end
It resets.
Further, the forging cutter blade is cut for the hard-metal insert of dome-type tooth or cone tooth or parabola tooth or chisel teeth
Cut element.
By taking above scheme, the beneficial effects of the present invention are:
1) when casing firing milling tool of the present invention transfers to casing predetermined position, first starting turntable makes its rotation, then opens mud
Stock pump, slush pump drive mud from being transported in casing firing milling tool in slurry tank, and mud flows through the spray on hydraulic piston at this time
Pressure is generated when mouth, under the promotion of the pressure, hydraulic piston downlink, thus push and opened outside forging cutter blade with moving mandrel's downlink,
It forges cutter blade and cross force and then Casing-Cutting is generated to casing wall, after casing cutting, forging cutter blade gradually reaches maximum for outer
Defined position can transfer drilling tool at this time and apply bit pressure progress casing firing milling construction, after the completion of construction, first stop slush pump and wait for pressure drop
After disappearance, piston reset, forging cutter blade is recovered in cutter groove by the weight of itself with the pressure difference stopped in slush pump rear cylinder body, then
Turntable is shut down, trip-out operation is carried out.A brill of the invention can complete casing firing milling, improve work efficiency, and structure is simple,
It is convenient to use；Hydraulic piston and stop collar are added in cylinder, can guarantee that state is steady, so that swaging clamp be avoided to embody
As.
2) present invention forging cutter blade is dome-type tooth or the hard-metal insert cutting member for boring tooth or parabola tooth or chisel teeth
There is part forging cutter blade carcass during forging milling to be constantly abraded, the continuous exposure of carbide button from sharp function, during forging milling
The iron filings of chip are in fracture of wire shape, prevent winding cutter hub, improve forging milling efficiency.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 attached drawing is a kind of half sectional view of casing firing milling tool provided by the invention.
In figure: 1- cylinder, 2- current limliting plug, 3- retaining ring, 4- overcurrent ring, 5- hydraulic piston, 6- mandrel, 7- forge cutter blade, 8-
Stop collar, 9- pressure regulation bar, 10- spring, 11- top connection, 12- lower contact, 13- hydrophthalmia channel, 14- limit shoulder, 51- nozzle,
71- fixed pin, 72- blade limited block.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside" is orientation based on the figure or position
Relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must have
There is specific orientation, be constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
As shown in Figure 1, the embodiment of the invention discloses a kind of casing firing milling tool, including cylinder 1, cylinder 1, which has, above to be connect
First 11 and lower contact 12, top connection 11 connect with drill collar, lower contact 12 is connect with junk mill or drill bit, further includes current limliting plug 2, retaining ring
3, overcurrent ring 4, hydraulic piston 5, mandrel 6, forging cutter blade 7 and stop collar 8；Current limliting plug 2, retaining ring 3, overcurrent ring 4, hydraulic piston 5,
Mandrel 6, forging cutter blade 7 and stop collar 8 are sequentially arranged inside cylinder 1 along top connection 11 to 12 direction of lower contact；Current limliting plug 2
It is connected as one by retaining ring 3 and overcurrent ring 4, aperture is offered on current limliting plug 2, hydrophthalmia channel 13 is offered inside cylinder 1, it is small
Hole is connected to by hydrophthalmia channel 13 with lower contact 12；Hydraulic piston 5 is threadedly coupled with mandrel 6, is opened up on 5 periphery of hydraulic piston
There is nozzle 51, aperture is connected to nozzle 51；Forging cutter blade 7 is mounted on inside cylinder 1 by fixed pin 71, and with 1 appearance of cylinder
Longitudinal hole site that face opens up is corresponding；The knife spine inclined-plane and mandrel 6 for forging cutter blade 7 are far from 4 end thereof contacts of overcurrent ring；Forge milling cutter
There is blade limited block 72 on piece 7；Stop collar 8 is mounted on forging cutter blade 7 inside the lower section of 71 one end of fixed pin, cylinder 1
With limit shoulder 14, stop collar 8 is corresponding with limit shoulder 14.
When casing firing milling tool of the present invention transfers to casing predetermined position, first starting turntable makes its rotation, then opens mud
Pump, slush pump drive mud from being transported in casing firing milling tool in slurry tank, and mud flows through the nozzle on hydraulic piston 5 at this time
Pressure is generated when 51, under the promotion of the pressure, 5 downlink of hydraulic piston, to be pushed outside forging cutter blade 7 with 6 downlink of moving mandrel
, forging cutter blade 7 generates cross force and then Casing-Cutting to casing wall, and after casing cutting, forging cutter blade 7 gradually reaches for outer
Maximum defined position can transfer drilling tool at this time and apply bit pressure progress casing firing milling construction, after the completion of construction, first stop slush pump and wait pressing
After power drop disappears, hydraulic piston 5 resets, and forging cutter blade 7 leans on the weight of itself and the pressure difference stopped in slush pump rear cylinder body to be recovered to
In cutter groove, it is then turned off turntable, carries out trip-out operation.A brill of the invention can complete casing firing milling, improve work efficiency,
And structure is simple, it is convenient to use；Hydraulic piston 5 and stop collar 8 are added in cylinder 1, can guarantee that state is steady, thus
Avoid swaging clamp embody as.
Specifically, forging 7 quantity of cutter blade is six, six forging cutter blades 7 are circumferentially equidistantly mounted on inside cylinder 1,
The opening pressure of two symmetrical forging cutter blades 7 is identical.
Specifically, further including pressure regulation bar 9, pressure regulation bar 9 is mounted on forging cutter blade 7 far from 71 side of fixed pin.
Specifically, further including spring 10, spring 10 connect the reset for hydraulic piston 5 with 5 one end of hydraulic piston.
Specifically, forging cutter blade 7 is dome-type tooth or the hard-metal insert cutting member for boring tooth or parabola tooth or chisel teeth
Part.
The operation principle of the present invention is that: after forging milling tool transfers to predetermined depth, turntable drives its rotation and mud
Pump driving mud enters inside it, and mud flow direction inside forging milling tool is divided into two, and one direct by the aperture of current limliting plug 2
Enter lower contact 12 by hydrophthalmia channel 13 and forms systemic circulation, another inflow hydraulic piston 5, hydraulic piston 5 and 6 screw thread of mandrel
It being linked together, mandrel 6 is pushed to move, mandrel 6 moves down, and end and forging 7 back contact of incline plane of cutter blade, forging cutter blade 7 open,
When the discharge capacity of slush pump reaches 5L/s, pressure the smallest two symmetrical forging milling cutters are opened under the promotion of hydraulic piston 5
Piece 7 opens the biggish forging cutter blade 7 of the symmetrical opening pressure of another pair when the discharge capacity of slush pump reaches 8L/s, works as mud
When the discharge capacity of pump reaches 10L/s, most latter two opening maximum forging cutter blade 7 of pressure is opened, the shape of forging 7 standard-sized sheet of cutter blade is reached
State, the rotary torque indicator increase of driller house just illustrate that forge cutter blade 7 contacts with internal surface of sleeve pipe, at this moment begins to carry out cutting work
Industry, after casing cutting, forging cutter blade 7 opens up into maximum position, and mandrel 6 pushes stop collar 8 to move down and supports with limit shoulder 14
Firmly, it cannot move down, at this moment be connected together with overcurrent ring 4 by retaining ring 3 because of current limliting plug 2, overcurrent ring 4, current limliting plug 2 stop again
It only moves down, mud is lived by 3 grades of retaining ring cannot be by hydraulic piston 5, and then can only enter 12 groups of lower contact by hydrophthalmia channel 13
At systemic circulation, area of passage and initial the ratio between area of passage at this moment is 3:1.It can significantly be seen on rig floor by pressure gauge
(3-5MPa) is reduced to pump pressure, just illustrates that casing is cut off, driller must continue to open at this time, the rotation of turntable driving instrument
20-30min, makes to forge cutter blade 7 and opens up into maximum position, until blade limited block 72 and stop collar 8 contact, then basis
Arrangement and method for construction adjusts bit pressure and torque down-cutting, and when milling length reaches design well depth, termination of pumping, hydraulic piston 5 is in spring
Reset is moved up under 10 active force, mandrel 6 also moves up simultaneously, and forging cutter blade 7 is recovered in cylinder 1, above mentions drilling tool, and forging has milled
At.
Operate with method of the invention is as follows:
1, the preparation before forging milling
<1>selection of well section:
A, under conditions of drilling technology and design allow, the excellent well section of selection cementing quality as much as possible；
B, casing-pipe cutting position should be selected in the middle part of casing and avoid box cupling, while avoid casing stabbing board；
C, forging milling well section lower part will have with a distance from 30 meters from shaft bottom or more, fall well iron filings to accommodate, and be conducive to underground complexity
The processing of situation.
<2>reasonable disposition mud property:
Mud density: 1.18-1.20g/cm3 (can be adjustable according to underground actual conditions), mud viscosity: 80s or more, shear force
18-25N, with guarantee it is as much as possible iron filings are carried out, entire work progress to keep mud property stablize, if bore meet
Water, brine layer will inhibit mud property to deteriorate in time；
<3>matched jack rabbit drifting must be used.
2, it cuts
When casing is completely severed, six forging cutter blades 7 open completely, and pump pressure will decreased significantly at this time, entire to cut off
Process generally requires 15~45 minutes, after cutting off casing, then revoling tube forging milling tool 10 minutes or more, cut off with finishing
Then face can carry out seat compacting and test, if the bit pressure of 20~30KN can be added, it was demonstrated that cut successfully, can pressurize and carry out forging milling work
Industry, sometimes at this moment off-position can may suitably increase break time just on casing coupling because calculating error.
3, forging milling casing
<1>after confirming that casing is cut off, forging milling can be carried out, at this moment discharge capacity is slowly mentioned to 20L/S by 10L/S (if adding suddenly
Huge discharge, drilling tool elongation is excessive to cause bit pressure to increase suddenly, so that turntable load increases, causing to sprain, it is serious to jump, or even can make
Phenomenon is stalled at turntable, less serious case's tool damage, severe one, which will cause, meets card phenomenon)
<2>it is important to note that connect first it is single before forging milling construction, bit pressure controls in 50KN, the feelings such as prevent bit pressure excessive
Condition cause forging cutter blade 7 deformation receive do not return in cutter groove, thus cause entire tool do not enter window, do not connect it is single, both
It can not be further continued for carrying out forging milling construction operation, and be likely to cause drilling tool accident.
4, it pulls out of hole
<1>under normal circumstances, the complete design well section of milling, it is repeated to lift from the top and put down in vain, it can pull out of hole, sufficiently be followed before pulling out of hole
Ring cleans wellbore, and then termination of pumping rotates turntable 5-10 minutes, and so that forging cutter blade 7 collapses, casing firing milling tool enters upper window
It slowly to prevent from meeting and block, scratch window or bit freezing when mouth；
<2>trip-out speed should be controlled no more than 0.2m/s, to prevent iron filings in flashboard or four by rising when being drilled near blowout preventer
Logical place's accumulation, causes stuck phenomenon, if the card that is hampered can be solved by the measures such as rotation, up and down；
<3>30 meters below drifting to windowing well section, magma in well is gone out to change new drilling fluid into, it is ensured that meet forging and milled
Iron filings in journey carry out.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (5)
1. a kind of casing firing milling tool, including cylinder, the cylinder has top connection and lower contact, and the top connection and drill collar connect
It connects, the lower contact is connect with junk mill or drill bit, which is characterized in that further include current limliting plug, retaining ring, overcurrent ring, hydraulic piston, core
Axis, forging cutter blade and stop collar；
The current limliting plug, the retaining ring, the overcurrent ring, the hydraulic piston, the mandrel, the forging cutter blade and the limit
Position ring is sequentially arranged at the inner barrel to the lower contact direction along the top connection；
The current limliting plug is connected as one by the retaining ring and the overcurrent ring, and the current limliting offers aperture beyond the Great Wall, described
Inner barrel offers hydrophthalmia channel, and the aperture is connected to by the hydrophthalmia channel with the lower contact；
The hydraulic piston is connect with the mandrel thread, offers nozzle on the hydraulic piston periphery, the aperture with
The nozzle connection；
The forging cutter blade is mounted on the inner barrel, and the longitudinal hole location opened up with the barrel outer surface by fixed pin
It sets corresponding；The knife spine inclined-plane and the mandrel of the forging cutter blade are far from the overcurrent ring end thereof contacts；The forging cutter blade
It is upper that there is blade limited block；
The stop collar is mounted on the forging cutter blade close to the lower section of described fixed pin one end, and the inner barrel has limit
Shoulder, the stop collar are corresponding with the limit shoulder.
2. a kind of casing firing milling tool according to claim 1, which is characterized in that the forging cutter blade quantity is six,
Six forging cutter blades are circumferentially equidistantly mounted on the inner barrel, of the forging cutter blade of symmetrical two
It is identical to open pressure.
3. a kind of casing firing milling tool according to claim 1, which is characterized in that it further include pressure regulation bar, the pressure regulation bar
The forging cutter blade is mounted on far from the fixed pin side.
4. a kind of casing firing milling tool according to claim 1, which is characterized in that it further include spring, the spring and institute
State the reset that the connection of hydraulic piston one end is used for the hydraulic piston.
5. a kind of casing firing milling tool according to claim 1-4, which is characterized in that the forging cutter blade is half
The hard-metal insert cutting element of ball-type tooth or cone tooth or parabola tooth or chisel teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910735057.9A CN110374536A (en) | 2019-08-09 | 2019-08-09 | A kind of casing firing milling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910735057.9A CN110374536A (en) | 2019-08-09 | 2019-08-09 | A kind of casing firing milling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110374536A true CN110374536A (en) | 2019-10-25 |
Family
ID=68258709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910735057.9A Pending CN110374536A (en) | 2019-08-09 | 2019-08-09 | A kind of casing firing milling tool |
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| CN (1) | CN110374536A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110863788A (en) * | 2019-12-10 | 2020-03-06 | 贵州高峰石油机械股份有限公司 | Hydraulic bendable pen point device |
| CN111894522A (en) * | 2020-07-28 | 2020-11-06 | 合力（天津）能源科技股份有限公司 | Damping hydraulic power type switchable rotary scraping sleeve milling tool |
| CN112112591A (en) * | 2020-09-30 | 2020-12-22 | 中国石油天然气集团有限公司 | Sleeve forging and milling tool and forging and milling method |
-
2019
- 2019-08-09 CN CN201910735057.9A patent/CN110374536A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110863788A (en) * | 2019-12-10 | 2020-03-06 | 贵州高峰石油机械股份有限公司 | Hydraulic bendable pen point device |
| CN110863788B (en) * | 2019-12-10 | 2023-11-28 | 贵州高峰石油机械股份有限公司 | Hydraulic bendable nib device |
| CN111894522A (en) * | 2020-07-28 | 2020-11-06 | 合力（天津）能源科技股份有限公司 | Damping hydraulic power type switchable rotary scraping sleeve milling tool |
| CN112112591A (en) * | 2020-09-30 | 2020-12-22 | 中国石油天然气集团有限公司 | Sleeve forging and milling tool and forging and milling method |
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