CN107956445A - A kind of all-hydraulic hydraulic internal cutting device - Google Patents
A kind of all-hydraulic hydraulic internal cutting device Download PDFInfo
- Publication number
- CN107956445A CN107956445A CN201810010480.8A CN201810010480A CN107956445A CN 107956445 A CN107956445 A CN 107956445A CN 201810010480 A CN201810010480 A CN 201810010480A CN 107956445 A CN107956445 A CN 107956445A
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- Prior art keywords
- mandrel
- hydraulic
- cutter
- shell
- cutting device
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/20—Grappling tools, e.g. tongs or grabs gripping internally, e.g. fishing spears
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Marine Sciences & Fisheries (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to a kind of all-hydraulic hydraulic internal cutting field, belongs to underground cutting tool technical field.It is made of shell, mandrel, mandrel cap, lower contact, cutter, shell lower end screw thread is provided with lower contact, mandrel is movably set with shell, shell below mandrel is provided with spindle seat, one end of spindle seat is threadedly coupled with lower contact, and cutter is provided with by pin and knife rest on the corresponding shell of mandrel.The principle of device is simple, compact-sized, can be changed during casing-pipe cutting according to ground observation drilling liquid pressure to judge the motion state of mandrel and cutter, the cutter of the device, can not only cut pipe sleeve, and can salvage pipe sleeve；By replacing various sizes of spindle seat, the distance of mandrel axial movement can be changed, so as to change the pipe sleeve of the maximum cutting outside diameter, thus cleavable different outside diameter of cutter, substantially increase the use scope of the device.
Description
Technical field
The present invention relates to a kind of all-hydraulic hydraulic internal cutting field, belongs to underground cutting tool technical field.
Background technology
Abandoned well operation is as last one of link in drillng operation, essential work during oil-gas exploration and development
Sequence.Carry out drilling at the sea mode this year to be changed, probing scope progressively turns to deep-sea from shallow sea, and deep oil is turned to by shallow oil-gas Layer
Gas-bearing formation, by simple geological stratification turn to complicated geological layer, due to be subject to probing region sea situation influenced, thereby using traditional cutting
Recovery method recycling subsea wellheads system becomes extremely difficult.Subsea cutting technology is not the continuity of land cutting, underwater special
Different operating environment determines the complexity and difficulty of Underwater Engineering, therefore has its unique theoretical foundation and implementation,
The technology that many is applied on land is not suitable under water.At present, the technology applied to deep water casing cutting mainly has explosion to cut
Cut, the cutting of chemical cleavage, abradant jet, diamond cut rope walking or dancing art, mechanical cutter cutting etc..Wherein mechanical hydraulic cutter because
Simple in structure, easy processing manufacture and cost is low and be widely used.But in the hydraulic inner cutter used at present, also there are following
Problem：It is complicated, complicated that service life of blade can not enough, after cutter cutting automatically retract body, tool construction, is easy to cause
Cutting accident, under the efficiency of cutting is relatively low, and without clearly judging the method whether casing cuts off completely.
The content of the invention
It is an object of the invention to：It is simple in structure to provide one kind, it is easy to use, to solve existing well lower cutting device cutter
Can only be disposable, and the all-hydraulic hydraulic internal cutting device of cut state can not be confirmed in cutting process.
The technical scheme is that：
A kind of all-hydraulic hydraulic internal cutting device, it is made of shell, mandrel, mandrel cap, lower contact, cutter, its feature exists
In：Shell lower end screw thread is provided with lower contact, is movably set with mandrel in shell, and the shell below mandrel is provided with spindle seat,
One end of spindle seat is threadedly coupled with lower contact, and cutter, cutter pair are provided with by pin and knife rest on the corresponding shell of mandrel
Connector ring is provided with by shop bolt in the mandrel answered, connector ring is flexibly connected by connecting rod with cutter.
The mandrel lower end termination is provided with mandrel cap by shear pin A.
By-pass prot is provided with the mandrel cap.
Guide ring, guide ring and mandrel activity are provided with by fixing bolt on outer casing inner wall above the mandrel cap
Connection.
Guiding tooth is axially evenly equipped with the guide ring inner wall, guide groove corresponding with being oriented to tooth is provided with mandrel,
Cooperation between guide ring and mandrel by being oriented to tooth and guide groove is slidably connected.
Shear pin B is provided with shell below the guide ring.
The mandrel is reducing tubular body, is provided with deflector hole in the mandrel above guide ring, deflector hole and mandrel
Centre bore connects.
Mandrel discharge orifice is provided with mandrel above the deflector hole.
Nozzle is provided with shell below the cutter, nozzle is connected with mandrel discharge orifice Intermittent Contact.
The cutter is circumferentially evenly distributed with three groups along shell, and cutter wing face is triangular facet.
Spindle seat discharge orifice is provided with the spindle seat.
The beneficial effects of the present invention are：
The all-hydraulic hydraulic internal cutting principle of device is simple, compact-sized, can be according to ground observation during casing-pipe cutting
Drilling liquid pressure changes to judge the motion state of mandrel and cutter, accurate and visual, convenient and reliable, can avoid judging by accident；Should
The cutter of device, can not only cut pipe sleeve, and can salvage pipe sleeve；The device can be by replacing various sizes of mandrel
Seat, to change the distance of mandrel axial movement, so that change the maximum cutting outside diameter of device, the pipe sleeve of cleavable different outside diameter,
Substantially increase the use scope of the device.
Brief description of the drawings：
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the left view structural representation of the present invention；
Fig. 3 is the working state schematic representation when present invention is not cut；
Fig. 4 is working state schematic representation when present invention cutting finishes；
Fig. 5 is working state schematic representation when cutter of the present invention playbacks；
Fig. 6 is the working state schematic representation when present invention salvages casing.
In figure：1st, shell, 2, mandrel, 3, mandrel cap, 4, lower contact, 5, cutter, 6, spindle seat, 7, knife rest, 8, positioning pin
Nail, 9, connector ring, 10, connecting rod, 11, shear pin A, 12, by-pass prot, 13, fixing bolt, 14, guide ring, 15, be oriented to
Tooth, 16, guide groove, 17, shear pin B, 18, deflector hole, 19, mandrel discharge orifice, 20, nozzle, 21, spindle seat discharge orifice, 22,
Small ball, 23, big steel ball.
Embodiment
The all-hydraulic hydraulic internal cutting device is made of shell 1, mandrel 2, mandrel cap 3, lower contact 4, cutter 5, shell 1
Lower end screw thread is provided with lower contact 4, and mandrel 2 is movably set with shell 1, passes through pin and knife rest on the corresponding shell 1 of mandrel 2
7 are provided with cutter 5, and cutter 5 is evenly distributed with three groups along shell 1 is circumferential, and the wing face of cutter 5 is triangular facet.Cutter 5 is corresponding
Connector ring 9 is provided with by shop bolt 8 in mandrel 2, connector ring 9 is flexibly connected by connecting rod 10 with cutter 5.Due to
The special structure of cutter 5, the device can not only by cutter 5 cut pipe sleeve, and cutter 5 be unfolded fix after formed fall
It is hook-shaped, pipe sleeve can be salvaged easily.
2 lower end termination of mandrel is provided with mandrel cap 3 by shear pin A11, and by-pass prot 12, the heart are provided with mandrel cap 3
Guide ring 14 is provided with by fixing bolt 13 on 1 inner wall of shell of the top of axle cap 3, is axially evenly equipped with and leads on 14 inner wall of guide ring
To tooth 15, guide groove 16 corresponding with being oriented to tooth 15 is provided with mandrel 2, by being oriented to tooth 15 between guide ring 14 and mandrel 2
Cooperation with guide groove 16 is slidably connected so that mandrel 2 only axially moves without circumferentially rotating at work.
Mandrel 2 is reducing tubular body, and deflector hole 18, deflector hole 18 and mandrel 2 are provided with the mandrel 2 of the top of guide ring 14
Centre bore connection, be provided with mandrel discharge orifice 19 in the mandrel 2 of the top of deflector hole 18, mandrel aerial drainage when mandrel 2 moves downward
Hole 19 is intermittently connected with nozzle 20（Connection）.
Shear pin B17 is provided with the shell 1 of the lower section of guide ring 14, shear pin B17 interference on shell 1 connects,
Mandrel 2 is fixed on above shear pin B17 by shear pin B17.
The shell 1 of the lower section of mandrel 2 is provided with spindle seat 6, and one end of spindle seat 6 is threadedly coupled with lower contact 4, spindle seat 6
On be provided with spindle seat discharge orifice 21, take care axle cap 3 on by-pass prot 12 connect when, spindle seat discharge orifice 21 connect mandrel 2 in
With the drilling fluid of lower contact 4, forming circuit.
It is small by putting into when the device reaches cutting position in the all-hydraulic hydraulic internal cutting device course of work
Steel ball 22, small ball 22 are moved to 3 central hole location of mandrel cap under the action of pumping forces, contact and block mandrel cap 3, increase at this time
Add drilling liquid pressure, the mandrel discharge orifice 19 in mandrel 2 does not connect with the nozzle 20 on shell 1, and all pumping forces, which all act on, to be pushed away
Aroused in interest axis 2, final shear pin B17 are cut by mandrel cap 3 so that mandrel 2, connector ring 9 and mandrel cap 3 move downwardly together
It is dynamic；In motion process during mandrel 2 moves downward, mandrel discharge orifice 19 in mandrel 2 by with the nozzle 20 on shell 1 by
Step connection；Cutter 5 is promoted by connector ring 9 and connecting rod 10 when mandrel 2 moves down at the same time, cutter 5 is produced around pin center
（Stretch out）, you can pipe sleeve progressive is cut, while cutting is considered to be worth doing by nozzle 20 and cutter 5 is washed away；Take care axle cap 3
When being completely attached to spindle seat 6, that is, show that the cutting of cutter 5 is completed, at this time on the mandrel discharge orifice 19 in mandrel 2 and shell 1
Nozzle 20 forms dislocation again, and drilling liquid pressure remains unchanged.
Gradually increase drilling pressure again afterwards, drilling liquid pressure is acted in mandrel cap 3 and on small ball 22 at this time, pressure
Mandrel cap 3 is promoted to be pressed down against with small ball 22；A part of hydraulic coupling acts on 2 step surface lower surface of mandrel by deflector hole 18
On, pressure promotes the step surface lower surface of mandrel 2 upward, so that mandrel 2 is moved upwards so that shear pin A11 quilts
Mandrel 2 is cut, and mandrel 2 is separated with mandrel cap 3, and mandrel 2 is upward under the action of drilling liquid pressure thrust and 5 gravity of cutter at this time
Mobile, mandrel 2 and cutter 5 return to initial position.Since movement connects the by-pass prot of mandrel cap 3 in mandrel 2, above and below drilling fluid
Connection forms circulation loop, and drilling fluid hydraulic coupling will reduce.
When needing to salvage casing, big steel ball 23 is put into, big steel ball 23 reaches 2 upper end tube nozzle of mandrel under the action of pumping forces
Position, big steel ball 23 contact and block 2 mouth of pipe of mandrel, and pumping forces push down on mandrel 2, until the cutter 5 on shell 1 is fully deployed
Casing is engaged, in 2 folding process of mandrel, mandrel cap 3 is pushed again, mandrel cap 3 is contacted with spindle seat 6, so that boring
Well liquid pressure remains unchanged, you can starts to salvage.
The all-hydraulic hydraulic internal cutting principle of device is simple, compact-sized, can be according to ground during casing-pipe cutting
Observation drilling liquid pressure changes to judge the motion state of mandrel 2 and cutter 5, accurate and visual, convenient and reliable, can avoid missing
Sentence；By replacing various sizes of spindle seat 3, the distance of the axial movement of mandrel 2 can be changed, so that the maximum for changing cutter 5 is cut
Outside diameter is cut, thus the pipe sleeve of cleavable different outside diameter, substantially increase the use scope of the device.
Claims (10)
1. a kind of all-hydraulic hydraulic internal cutting device, it is by shell（1）, mandrel（2）, mandrel cap（3）, lower contact（4）, cutter
（5）Form, it is characterised in that：Shell（1）Lower end screw thread is provided with lower contact（4）, shell（1）Inside it is movably set with mandrel（2）,
Mandrel（2）The shell of lower section（1）Spindle seat is installed（6）, spindle seat（6）One end and lower contact（4）It is threadedly coupled, mandrel
（2）Corresponding shell（1）It is upper to pass through pin and knife rest（7）Cutter is installed（5）, cutter（5）Corresponding mandrel（2）Upper pass through is determined
Position pin（8）Connector ring is installed（9）, connector ring（9）Pass through connecting rod（10）With cutter（5）It is flexibly connected.
A kind of 2. all-hydraulic hydraulic internal cutting device according to claim 1, it is characterised in that：The mandrel（2）
Lower end termination passes through shear pin A（11）Mandrel cap is installed（3）.
A kind of 3. all-hydraulic hydraulic internal cutting device according to claim 1, it is characterised in that：The mandrel cap
（3）On be provided with by-pass prot（12）.
A kind of 4. all-hydraulic hydraulic internal cutting device according to claim 1, it is characterised in that：The mandrel cap
（3）The shell of top（1）Pass through fixing bolt on inner wall（13）Guide ring is installed（14）, guide ring（14）With mandrel（2）It is living
Dynamic connection.
A kind of 5. all-hydraulic hydraulic internal cutting device according to claim 4, it is characterised in that：The guide ring
（14）Guiding tooth is axially evenly equipped with inner wall（15）, mandrel（2）On be provided be oriented to tooth（15）Corresponding guide groove（16）, lead
Xiang Huan（14）With mandrel（2）Between by being oriented to tooth（15）And guide groove（16）Cooperation be slidably connected.
A kind of 6. all-hydraulic hydraulic internal cutting device according to claim 5, it is characterised in that：The guide ring
（14）The shell of lower section（1）On be provided with shear pin B（17）.
A kind of 7. all-hydraulic hydraulic internal cutting device according to claim 1, it is characterised in that：The mandrel（2）
For reducing tubular body, guide ring（14）The mandrel of top（2）On be provided with deflector hole（18）, deflector hole（18）With mandrel（2）'s
Centre bore connects.
A kind of 8. all-hydraulic hydraulic internal cutting device according to claim 7, it is characterised in that：The deflector hole
（18）The mandrel of top（2）On be provided with mandrel discharge orifice（19）.
A kind of 9. all-hydraulic hydraulic internal cutting device according to claim 1, it is characterised in that：The cutter（5）
The shell of lower section（1）On be provided with nozzle（20）, nozzle（20）With mandrel discharge orifice（19）Intermittent Contact connects.
A kind of 10. all-hydraulic hydraulic internal cutting device according to claim 1, it is characterised in that：The cutter（5）
Along shell（1）Three groups circumferentially are evenly distributed with, cutter（5）Wing face is triangular facet；The spindle seat（6）On be provided with mandrel
Seat（6）Discharge orifice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810010480.8A CN107956445B (en) | 2018-01-05 | 2018-01-05 | Full-hydraulic internal cutting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810010480.8A CN107956445B (en) | 2018-01-05 | 2018-01-05 | Full-hydraulic internal cutting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107956445A true CN107956445A (en) | 2018-04-24 |
| CN107956445B CN107956445B (en) | 2023-11-10 |
Family
ID=61956145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810010480.8A Active CN107956445B (en) | 2018-01-05 | 2018-01-05 | Full-hydraulic internal cutting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107956445B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110552646A (en) * | 2019-09-19 | 2019-12-10 | 中国石油天然气股份有限公司西南油气田分公司工程技术研究院 | Rotary hydraulic jet cutting casing tool and construction method thereof |
| CN112780208A (en) * | 2021-01-06 | 2021-05-11 | 中国矿业大学 | Gas extraction drilling fault-breaking deformation area repairing system and repairing method |
| CN114434337A (en) * | 2020-11-03 | 2022-05-06 | 中国海洋石油集团有限公司 | Hydraulic cutting knife guiding device and guiding method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5791409A (en) * | 1996-09-09 | 1998-08-11 | Baker Hughes Incorporated | Hydro-mechanical multi-string cutter |
| US20100025120A1 (en) * | 2008-08-01 | 2010-02-04 | Tesco Corporation (Us) | Casing Shoe and Retrievable Bit Assembly |
| CN102003146A (en) * | 2010-11-04 | 2011-04-06 | 中国石油天然气集团公司 | Full-hydraulic reamer |
| CN102747977A (en) * | 2012-07-20 | 2012-10-24 | 长江大学 | Internal cutting device of hydraulic sleeve |
| CN204386532U (en) * | 2015-01-07 | 2015-06-10 | 长江大学 | A kind of pressure release type deep water casing internal cutting device |
| CN206205843U (en) * | 2016-11-11 | 2017-05-31 | 朱海东 | Hydraulic water power formula internal cutter |
-
2018
- 2018-01-05 CN CN201810010480.8A patent/CN107956445B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5791409A (en) * | 1996-09-09 | 1998-08-11 | Baker Hughes Incorporated | Hydro-mechanical multi-string cutter |
| US20100025120A1 (en) * | 2008-08-01 | 2010-02-04 | Tesco Corporation (Us) | Casing Shoe and Retrievable Bit Assembly |
| CN102003146A (en) * | 2010-11-04 | 2011-04-06 | 中国石油天然气集团公司 | Full-hydraulic reamer |
| CN102747977A (en) * | 2012-07-20 | 2012-10-24 | 长江大学 | Internal cutting device of hydraulic sleeve |
| CN204386532U (en) * | 2015-01-07 | 2015-06-10 | 长江大学 | A kind of pressure release type deep water casing internal cutting device |
| CN206205843U (en) * | 2016-11-11 | 2017-05-31 | 朱海东 | Hydraulic water power formula internal cutter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110552646A (en) * | 2019-09-19 | 2019-12-10 | 中国石油天然气股份有限公司西南油气田分公司工程技术研究院 | Rotary hydraulic jet cutting casing tool and construction method thereof |
| CN110552646B (en) * | 2019-09-19 | 2020-05-05 | 中国石油天然气股份有限公司西南油气田分公司工程技术研究院 | Rotary hydraulic jet cutting casing tool and construction method thereof |
| CN114434337A (en) * | 2020-11-03 | 2022-05-06 | 中国海洋石油集团有限公司 | Hydraulic cutting knife guiding device and guiding method thereof |
| CN112780208A (en) * | 2021-01-06 | 2021-05-11 | 中国矿业大学 | Gas extraction drilling fault-breaking deformation area repairing system and repairing method |
| CN112780208B (en) * | 2021-01-06 | 2021-10-26 | 中国矿业大学 | Gas extraction drilling fault-breaking deformation area repairing system and repairing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107956445B (en) | 2023-11-10 |
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