CN107701136A - A kind of new type of deep-water major diameter hydraulic cutter and efficient blade apparatus - Google Patents
A kind of new type of deep-water major diameter hydraulic cutter and efficient blade apparatus Download PDFInfo
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- CN107701136A CN107701136A CN201710321267.4A CN201710321267A CN107701136A CN 107701136 A CN107701136 A CN 107701136A CN 201710321267 A CN201710321267 A CN 201710321267A CN 107701136 A CN107701136 A CN 107701136A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 238000005520 cutting process Methods 0.000 claims abstract description 130
- 239000000956 alloy Substances 0.000 claims abstract description 20
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 20
- 230000008859 change Effects 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims description 26
- 239000012530 fluid Substances 0.000 claims description 18
- 210000002445 nipple Anatomy 0.000 claims description 17
- 230000001105 regulatory effect Effects 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 238000012856 packing Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 2
- 239000013535 sea water Substances 0.000 description 10
- 238000005553 drilling Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 239000002699 waste material Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
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- 239000013505 freshwater Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
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- 238000012938 design process Methods 0.000 description 1
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- 150000002430 hydrocarbons Chemical class 0.000 description 1
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Classifications
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- 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
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- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention discloses a kind of new type of deep-water major diameter hydraulic cutter and efficient blade apparatus, including：Cutting blade, the outer middle side part of the cutting blade is vertically arranged with a chip area, and on the right side of chip area or in the outer lateral side in left side, be fixed with one first alloy cutting edge, one second alloy cutting edge is fixed with the right side of cutting blade or in left lateral sides, the first alloy cutting edge and the second alloy cutting edge are located at chip area the same side.Device provided by the present invention, so that new type of deep-water major diameter hydraulic cutter can discharge metal fillings caused by the first alloy cutting edge Casing-Cutting with efficient blade apparatus by chip area, so as to change prior art cutting blade the present situation set is corresponded with cutting edge, the quantity of cutting edge is added, improves the cutting efficiency of new type of deep-water major diameter hydraulic cutter and efficient blade apparatus.
Description
Technical field
The present invention relates to deep water abandoned well cutting equipment technical field, more particularly to a kind of new type of deep-water major diameter waterpower
Cutter and efficient blade apparatus.
Background technology
The exploitation of oil gas field will typically pass through exploration, Development Engineering construction, production and waste disposal overall process, waste disposal
It is final link therein.Related laws and regulations regulation in the world, after offshore oil and gas field stops production operation, if without it
His purposes or sensible argument, it is necessary to prepare retired and carry out waste disposal.It is retired to refer to petroleum installation from running status being changed into
Close, without the activity relevant with hydrocarbon state（Do not include the activity relevant with other disposal with being moved away from）.Discarded place
Put and refer to move to petroleum installation finally, and the process for recycling, recycling or depositing on the spot.
Offshore oil and gas field waste disposal is one and is related to all many system engineerings, although the inverse mistake of Development Engineering
Journey, but its aspect being related to is incomplete same with development process, there is its special character.The Demolition Construction of offshore structures can return
Become separation（Mainly use cutting technique）, lifting, transport, disembarkation processing or marine reverse four parts.Wherein, machine cuts are
In separation process compared with frequently with technology, it is different from cumulative charge, and cumulative charge is by factors such as environment and technologies
Influence, using limited larger, machine cuts then limit without this.
In the prior art, imderwater cutting cutter device（Referred to machine cuts, hereinafter referred to as cutter device）Generally bag
Include：Cutting edge that cutter bod, cutting blade, the one-to-one corresponding set gradually from the bottom to top is fixed on cutting blade, bearing pin, piston group
Part, spring, nozzle and extension bar, wherein, extension bar and piston component are respectively arranged with first flow and second flow channel, and nozzle is arranged at
Between first flow and second flow channel, the external liquid supply equipment of extension bar.When cutter device need to go into the well cutting, first with adhesive tape or
The binding pieces such as rope are by cutting blade colligation in cutter bod；Secondly cutter device is transferred to cleavage；Again, first flow is passed through
And second flow channel is to piston component infusion pressurization, until piston component pushes, collapses cutting blade；Finally, rotary cutting knife piece is cut
Sleeve pipe.
Prior art cutter device is disadvantageous in that：Because of chip removal inconvenience, and cause cutting blade and cutting edge negligible amounts,
Cutting efficiency is relatively low.
Therefore, prior art has yet to be improved and developed.
The content of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, there is provided a kind of new type of deep-water is big
Diameter hydraulic cutter and efficient blade apparatus, it is intended to solve in the prior art because of chip removal inconvenience, and cause cutting blade and cutting edge
Negligible amounts, the problem of cutting efficiency is relatively low.
The technical proposal for solving the technical problem of the invention is as follows：
A kind of new type of deep-water major diameter hydraulic cutter and efficient blade apparatus, including：Extension bar, the cutter for being connected to extension bar lower end
Body, and multiple one end are rotatably connected in the cutting blade of cutter bod, and the extension bar is provided with first flow, the cutter bod upper end and
Lower end is respectively arranged with the second flow channel and third flow channel communicated with first flow, and a piston is provided with the second flow channel,
The piston can move down after being pressurized, and promote cutting blade rotation overhanging, wherein, the outer middle side part of the cutting blade is vertically arranged with
One chip area, and an alloy cutting edge is respectively arranged with the left of chip area and on the lateral surface on right side.
Described new type of deep-water major diameter hydraulic cutter and efficient blade apparatus, wherein, the cutting blade is provided with four,
Four cutting blades are arranged at intervals at cutter bod outer rim, so that uniform force when symmetrically arranged cutting blade is cut.
Described new type of deep-water major diameter hydraulic cutter and efficient blade apparatus, wherein, it is provided with one below the piston
Contracting knife slide, the contracting knife slide are movably arranged in third flow channel, and it is used to rise after casing severing, promotes cutting blade
Shrink back in cutter bod；
The contracting knife slide outer rim is arranged with one second flexible member, and second flexible member is pressed when contracting knife slide declines
Contracting, and resetted after piston is no longer pressurized, promote contracting knife slide to rise.
Described new type of deep-water major diameter hydraulic cutter and efficient blade apparatus, wherein, along axle center side in the middle part of the piston
To being provided through a piston runner；
The new type of deep-water major diameter hydraulic cutter is circumscribed with a pressure-display device with efficient blade apparatus, and it also includes：
The nozzle and valve rod being set in turn in from the bottom to top in second flow channel, the nozzle are fixedly connected on piston upper end, wherein
Portion is provided through a nozzle flow channel communicated with piston runner, and one and nozzle flow channel phase are provided through in the middle part of the valve rod
Logical and diameter is less than the valve rod runner of nozzle flow channel；
The valve rod outer rim is arranged with positioning seat, the first flexible member and valve stem spacing regulating part successively from the bottom to top, described fixed
Position seat is fixedly installed in the middle part of second flow channel, is provided with two symmetrical liquid flow holes in axle center；The valve stem spacing regulating part
Valve rod upper end is connected to, its band ovable valve stem that is pressurized after second flow channel fluid injection declines, while compresses the first flexible member, is reached at it
To before limit inferior position, valve rod is brought into close contact with nozzle, comes from the liquid of valve rod runner to ensure that nozzle flow channel only receives,
After it reaches limit inferior position, valve rod departs from nozzle so that nozzle flow channel can receive the liquid for coming from liquid flow hole, to carry out
Pressure release.
Described new type of deep-water major diameter hydraulic cutter and efficient blade apparatus, wherein, the valve stem spacing regulating part is
Stop nut, the stop nut is adjustable to be connected to valve rod upper end, to adjust the disengaging configuration of valve rod and nozzle, so as to carry out
The casing-pipe cutting work of different size.
Described new type of deep-water major diameter hydraulic cutter and efficient blade apparatus, wherein, the valve rod includes：
The sliding part of positioning seat, the first flexible member and screw limiting part is sequentially passed through, and be integrally formed with the sliding part,
In hemispherical, for being bonded the nozzle sticking part of nozzle, the cross section of the nozzle sticking part is more than the cross section of sliding part.
Described new type of deep-water major diameter hydraulic cutter and efficient blade apparatus, wherein, the valve rod upper end and valve rod limit
Position regulating part is contained in first flow after extension bar is connected with cutter bod.
Described new type of deep-water major diameter hydraulic cutter and efficient blade apparatus, wherein, the new type of deep-water major diameter water
Power cutter also includes with efficient blade apparatus：
The flow nipple being sheathed at the top of valve rod outer rim, the flow nipple are located in first flow, and its outer rim and extension bar inwall it
Between be provided with a liquid stream gap；
A flow nipple runner is offered along axis direction in the middle part of the flow nipple, the flow nipple runner communicates with valve rod runner,
The change of magnitude of pressure differential can be adjusted by changing flow nipple.
Described new type of deep-water major diameter hydraulic cutter and efficient blade apparatus, wherein, it is provided with the second flow channel
One bushing, the bushing is located at piston outer rim, and its upper surface is bonded with positioning seat lower surface；
The piston outer rim offers one to several support slot, and has sealing ring, the sealing ring by the support slot clamping
Inner side is fastened in support slot, and outside fits in the bushing.
Described new type of deep-water major diameter hydraulic cutter and efficient blade apparatus, wherein, the piston upper end is provided with one
Nozzle holding tank, the nozzle include：The Piston connecting portion of the nozzle holding tank is contained in, and is exposed to above piston
Valve rod sticking part；
A packing ring is provided between the piston upper surface and the valve rod sticking part lower surface.
New type of deep-water major diameter hydraulic cutter provided by the present invention and efficient blade apparatus, as a result of longitudinally disposed
In the chip area of middle side part outside cutting blade, and an alloy chip is respectively arranged with the left of chip area and on the lateral surface on right side
Sword so that new type of deep-water major diameter hydraulic cutter can discharge the first alloy cutting edge by chip area with efficient blade apparatus and cut
Metal fillings caused by sleeve pipe, the present situation set is corresponded with cutting edge so as to change prior art cutting blade, is added
The quantity of cutting edge, while add chip area, it is possible to reduce cutting rubbing resistance and the heating for reducing cutting edge, so as to improve
It is equipped with the service life and cutting efficiency of the deep water abandoned well cutter device of double-edged blade.
Brief description of the drawings
When Fig. 1 is that new type of deep-water major diameter hydraulic cutter of the present invention is flared to extreme position with efficient blade apparatus cutting blade
The profile of preferred embodiment.
Local A enlarged drawing in Fig. 2 Fig. 1 of the present invention.
Fig. 3 is new type of deep-water major diameter hydraulic cutter of the present invention when being retracted to cutter bod with efficient blade apparatus cutting blade compared with
The profile of good embodiment.
Fig. 4 is new type of deep-water major diameter hydraulic cutter of the present invention and efficient blade apparatus cutting edge position view.
Embodiment
To make the objects, technical solutions and advantages of the present invention clearer, clear and definite, develop simultaneously embodiment pair referring to the drawings
The present invention is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and do not have to
It is of the invention in limiting.
New type of deep-water major diameter hydraulic cutter is connected to drilling platforms with efficient blade apparatus in the present invention, belongs to deep water behaviour
Make instrument, it is larger with common cutter device difference, so it is easy to understand that because it need to be operated in deep water, operational control
Difficulty is larger.
It is understood that drilling platforms use cost is high, such as 981 drilling platforms, it sends out equipped with 8 4.4 ten thousand kilowatts of diesel oil
Motor, needed for generated energy a close to medium-sized city, it needs tender to convey diesel oil, fresh water, daily necessities and various weekly
Consumptive material etc..According to statistics, 981 drilling platforms averagely consume 30 tons of diesel oil daily, reach as high as 60 to 70 tons, nearly 40 tons of fresh water, add
Upper 180 personnel and other consumption, along with daily rental fee more than 300 ten thousand, day equivalent ten thousand yuans of the 400-500 of rate（Do not work shape
Under state）, and the consumption under working condition is undoubtedly higher.It can be said that the insignificant stop of per a moment of drilling platforms all will
Cause the waste of huge amounts of material.In the prior art, due to the qualitative thinking in design process, cutting edge and cutting blade are all one by one
It is correspondingly arranged, and the quantity of cutting blade should not be excessive, otherwise the wall thickness of cutter bod is excessively thin between adjacent cutting blade, can not bear
Come from the resistance of internal surface of sleeve pipe in cutting process, therefore, cutting edge limited amount, so as to cause casing-pipe cutting less efficient,
How cutting efficiency to be improved, the problem of to save drilling platforms working time and resource consumption be one particularly important.
Refer to Fig. 1 to Fig. 4, a kind of new type of deep-water major diameter hydraulic cutter that present pre-ferred embodiments provide with efficiently
Blade apparatus（Abbreviation cutter device）, a pressure-display device is circumscribed with, the pressure-display device is arranged on drilling platforms,
The fluid pressure change in second flow channel can be shown, the measurement of fluid pressure and prior art is shown as, will not be repeated here.This
The structure that invention focuses on new type of deep-water major diameter hydraulic cutter and efficient blade apparatus is improved, and its setting is as follows：
Including extension bar 1, insertion is connected to the cutter bod 2 of the lower end of extension bar 1, and extension bar 1 is provided with one along axis direction and is used to note
Liquid pressurization makes the first flow that cutter device is started working, and the upper end of cutter bod 2 and lower end are then respectively arranged with one along axis direction
Second flow channel and third flow channel, the liquid injected by first flow successively flow through second flow channel and third flow channel, should be noted
, it is provided between the second flow channel and third flow channel multiple substantially in the cutting blade loose slot of undercut font, cutting blade 9
When non-fluid injection is pressurizeed, cutting blade loose slot is completely accommodated in, and after fluid injection pressurization, then under the promotion of piston 6, close to
One end rotation of piston 6, the other end are overhanging.
In preferred embodiments of the present invention, the second flow channel includes：The extension bar connecting portion from top to bottom set gradually
And positioning seat fixed part；The cross section of the extension bar connecting portion is in wide at the top and narrow at the bottom trapezoidal；The positioning seat fixed part is in cylinder
Type, its lower end are provided with a bushing 3, and the bushing 3 is located at the outer rim of piston 6, and its upper surface is bonded with the lower surface of positioning seat 11；
And the outer rim of piston 6 then offers one to several support slot, and there are a sealing ring 7, the sealing ring 7 by the support slot clamping
Inner side is fastened in support slot, and outside is brought into close contact in the bushing 3.
The shape adaptation of extension bar connecting portion is to ensure the connective stability of the two in the lower end of extension bar 1.
The upper end of extension bar 1 can jointed rod, this is prior art, the present invention no longer it is repeated herein.
The emphasis of the present invention thes improvement is that：A cutting blade 9, each cutting blade are provided with each cutting blade loose slot
9 are all provided with the first alloy cutting edge 19 on the lateral surface in the left side of chip area 18, and on the lateral surface on the right side of chip area 18
It is provided with the second alloy cutting edge 20；Or the second alloy cutting edge 20 is provided with the lateral surface in the left side of chip area 18, and
The first alloy cutting edge 19 is provided with the lateral surface on the right side of chip area 18, particular location refer to Fig. 4, the first alloy cutting edge
19 and second alloy cutting edge set location should be advantageous for exclude sleeve pipe bits.
First alloy cutting edge 19 and the second alloy cutting edge 20 are arranged on the left side of chip area 18 or right side, to depend on
When being cut, the direction of rotation of cutter bod 2, if that is, cutter bod 2 turns clockwise, the second alloy cutting edge 20 is fixed on
The right side of cutting blade 9, and right side is concordant with the right flank of cutting blade 9, is otherwise unfavorable for Casing-Cutting, can not also be discharged by chip area
Sleeve pipe is considered to be worth doing；And the first alloy cutting edge 19 is then fixed on the left side of chip area 18, so, during chip sleeve pipe could by set up separately two
Individual cutting edge priority Casing-Cutting, accelerate cutting efficiency；During 2 rotate counterclockwise of cutter bod, principle is identical, repeats no more.
Except chip area 18 setting and cutting edge quantity unlike the prior art in addition to, the quantity of cutting blade 9 also with it is existing
Technology is different.The quantity of cutting blade 9 of prior art is provided only with three, of the invention then be provided with four, and this is not only quantity
Different changes, it also solves the problem of cutting blade 9 easily rocks in the prior art.Three exist cutting blade 9 in the prior art
When being cut, because its stress is asymmetric, cutting blade 9 can be caused to rock（Such as, one of cutting blade 9 touches barrier
When, it is rocked by resistance, and due to being supported on internal surface of sleeve pipe without symmetrically arranged cutting blade 9 so it can be produced）, and this
Cutting blade 9 is changed to four by invention, the symmetrically arranged stress equalization of cutting blade 9, it is higher to cut stability.
That is, the present invention is not merely to improve the setting quantity that cutting efficiency just changes cutting blade 9, it is heavier
Want, which raises the stability during work of cutting blade 9, certainly, due to the increase of the quantity of cutting blade 9, coordinate each cutter
Piece 9 can all be connected two cutting edges so that the cutting edge quantity of cutter device by three changes of script for eight, greatly
It is also one of emphasis improvement of the present invention to improve chip efficiency.
It is preferred that the cutting blade 9 is rotatably connected in cutter bod 2 by bearing pin 16, and the lateral surface of cutting blade 9 is to deviate to cut
The side of cutter hub 2 is welded with broken alloy 17.
Conventional new type of deep-water major diameter hydraulic cutter can not effectively know the casing severing time with efficient blade apparatus, cause
The operation resource of drilling platforms and the waste of residence time, and a significant deficiency, in order to solve the technical problem, institute of the present invention
The new type of deep-water major diameter hydraulic cutter of offer is also provided with following structure with efficient blade apparatus.
Prior art is declined by the fluid injection direct drive piston component that pressurizes, and realizes that the rotation of cutting blade 9 is overhanging, inside it
Liquid pressure value is fixed.Of the invention then piston 6, nozzle 4 and valve rod 10, positioning seat by being arranged in second flow channel
11st, the first flexible member 13 and valve stem spacing regulating part 14 so that cutter device can be brought into close contact by nozzle 4 and valve rod 10 and
Depart from two states, realize pressure change, so as to by pressure change, know that cutting edge has reached predeterminated position, and sleeve pipe
Cut off.
In present pre-ferred embodiments, piston 6, nozzle 4 and valve rod 10 are set in turn in second flow channel from the bottom to top,
Positioning seat 11, the first flexible member 13 and valve stem spacing regulating part 14 are then sheathed on the outer rim of valve rod 10 successively from the bottom to top.
The piston 6 can move up and down in second flow channel, and its power comes from the pressure that injected liquid is brought, piston
The 6 extended second flow channel in lower end, it is overhanging so as to promote cutting blade 9 to start to rotate into cutting blade loose slot.The piston 6
Outer rim should be sealed in the inwall of cutter bod 2, prevent gap between piston 6 and cutter bod 2 being present, on the one hand ensure that fluid pressure is enough
Piston 6 is promoted to decline；On the other hand, liquid leakage is prevented, pressure-display device shows that pressure declines, causes operator to judge by accident.
When specifically used, piston 6 is sealed in the inwall of cutter bod 2 by external sealing ring 7, and the inner side of sealing ring 7 fits in piston 6,
Outside fits in the inwall of cutter bod 2；The piston 6 offers a support slot for being used for clamping sealing ring 7.The sealing ring 7 is set
Two up and down are equipped with, its longitudinal section is in inverted Y-shaped, will not be due to the frictional force between bushing 3 while to ensure sealing
It is excessive and cause that piston 6 can not decline or decrease speed is limited, so that influenceing casing-pipe cutting efficiency.
When it is implemented, being provided with a bushing 3 in the second flow channel, the bushing 3 is located at the outer rim of piston 6, and thereon
End face is bonded with the lower surface of positioning seat 11；The outer rim of piston 6 offers a support slot, and has one by the support slot clamping
Sealing ring 7, the inner side of sealing ring 7 are fastened in support slot, and outside fits in the bushing 3.
The upper end of piston 6 is provided with a nozzle holding tank, and the nozzle 4 includes：It is contained in the nozzle holding tank
Piston connecting portion, and it is exposed to the valve rod sticking part of the top of piston 6；Under the upper surface of piston 6 and the valve rod sticking part
A packing ring 5 is provided between end face.
It is preferred that the nozzle 4 is threadedly connected to piston 6, while being fixedly connected so as to the two, conveniently safeguarded or more
Change, the nozzle 4 is provided with nozzle flow channel, and nozzle flow channel is the necessary channel that liquid flows to third flow channel in second flow channel.
Nozzle 4 and the structure of nozzle 4 of the prior art and differed in the present invention, in the prior art the nozzle flow channel set by nozzle 4
In funnel type, nozzle flow channel is arranged to cylindrical type in the present invention, has a diameter larger than the diameter of valve rod runner, the setting precisely in order to
It is front and rear to realize that nozzle 4 and valve rod 10 depart from, the change of fluid pressure and set.It can be seen that nozzle 4 and prior art in the present invention
In the structure of nozzle 4 with effect differ.
The valve rod 10 is provided with valve rod runner, and it declines under the drive of valve stem spacing regulating part 14, is limited in valve rod
Before position regulating part 14 reaches limit inferior position, valve rod 10 is bonded with nozzle 4, and now, valve rod runner is liquid flow in second flow channel
Move to the necessary channel of third flow channel, and the upper surface of piston 6 and the inwall of cutter bod 2 will be formed one can only enter to go out it is semiclosed
Accommodating chamber；And after valve stem spacing regulating part 14 reaches limit inferior position, valve rod 10 departs from nozzle 4, and valve rod runner will no longer
The necessary channel of third flow channel is flowed to as liquid in second flow channel, and flow to the upper surface of piston 6 and the inwall of cutter bod 2 it
Between liquid third flow channel can be flow to by nozzle flow channel, when being bonded relative to valve rod 10 with nozzle 4, the upper end surface of piston 6
Fluid pressure decline, shown by external pressure-display device.
When it is implemented, the valve rod 10 may be configured as torus, i.e. the cross section of valve rod 10 is in annular, with nozzle 4
During fitting, the upper end end face of nozzle 4 is bonded by the lower end surface of valve rod 10.But in order to which that improves valve rod 10 and nozzle 4 is bonded compactness,
More preferably scheme is that the lower end of valve rod 10 and upper end of nozzle are arranged into convex-concave sphere, it is to be understood that after the fitting of convex-concave sphere
Sealing and centering be significantly larger than the fitting effects of two planes；The concrete structure of valve rod 10 may include：It is fixed to sequentially pass through
Position seat 11, the sliding part of the first flexible member 13 and screw limiting part, and be integrally formed with the sliding part, in hemispherical,
For being bonded the nozzle sticking part of nozzle 4, the cross section of the nozzle sticking part is more than the cross section of sliding part.
The using effect of nozzle sticking part prevents on the one hand as described above, that improves valve rod 10 and nozzle 4 is bonded compactness
The liquid of nozzle flow channel is flowed to outward leakage by valve rod runner；On the other hand, then realized by its cross section, because its cross section is big
In the cross section of sliding part, so in second flow channel after fluid injection pressure, the part that nozzle sticking part protrudes from sliding part will be by
The fluid pressure extra to one, promotes it to move down, and the setting can improve synchronism when valve rod 10 declines with nozzle 4.
It is clear that one is used for connecting screw locating part, the two is used for for the first elasticity member for the effect of the sliding part
The compression of part 13 is oriented to, and three is used for the drive in screw limiting part, and under the guiding of positioning seat 11, along axis direction to moving down
It is dynamic.
The positioning seat 11 has two effects, one be used to valve rod 10 move up and down guiding and spacing, second, can lead to
The liquid flow hole being arranged on is crossed, fluid injection to the upper surface of piston 6, forms the pressure for promoting piston 6 to move down.Positioning seat 11 is fixed on
In the middle part of second flow channel, its axis direction is provided through one and is arranged the pilot hole for adapting to valve rod 10.When it is implemented, liquid flow hole
Two or four is may be configured as, should at least set two, ensures liquid flow velocity and the stress equalization of piston 6, is preferably arranged to
Four, so that the upper surface stress equalization of piston 6.
For the valve stem spacing regulating part 14 during with a casing-pipe cutting, the relative position with valve rod 10 is fixed
, preferable scheme, which is that valve stem spacing regulating part 14 is adjustable, is connected to valve rod 10, to adjust the disengaging of valve rod 10 and nozzle 4
Position, so as to carry out the work of the casing-pipe cutting of different size；When it is implemented, valve stem spacing regulating part 14 can be arranged to spacing
Nut, not only position adjustments are convenient, and higher with the connection reliability of valve rod 10.The quantity of stop nut is preferably arranged to two
Individual, for two stop nuts for a stop nut, interlocking capability is relatively good, under deepwater environment, two stop nuts
Mutually position will not change after locking, set two stop nuts to improve the spacing reliability with valve rod 10.
And the outer rim of valve rod 10, the lower section of the first flexible member 13, the upper surface of positioning seat 11 is additionally provided with a spring guide
12。
In the present invention further preferred embodiment, the pressure difference changes limit-type deep water casing-pipe cutting hydraulic cutter greatly
Device also includes：
The flow nipple 15 being sheathed at the top of the outer rim of valve rod 10, the flow nipple 15 are located in first flow, and its outer rim and extension bar 1
A liquid stream gap is provided between inwall；The middle part of flow nipple 15 offers a flow nipple runner, the section along axis direction
Stem bar runner communicates with valve rod runner, and its diameter is less than valve rod runner.
In the present invention further preferred embodiment, the lower section of piston 6 is provided with a contracting knife slide, and the contracting knife is slided
Seat is movably arranged in third flow channel, and it is used to rise after casing severing, promotes cutting blade 9 to shrink back in cutter bod 2；Institute
To state contracting knife slide outer rim and be arranged with one second flexible member, second flexible member is compressed when contracting knife slide declines, and
Resetted after piston 6 is no longer pressurized, promote contracting knife slide to rise.
Due to the presence of contracting knife slide and the second flexible member, before non-fluid injection pressurization, cutting blade 9 be can not rotate it is overhanging
's；And after fluid injection pressurization, before cutting completion, cutting blade 9 also can only gradually rotate overhanging；After the completion of cutter work, contracting knife
Slide will promote cutting blade 9 to reset, and no longer only rely on seawater pressure and the deadweight of cutting blade 9 is shunk.Therefore, the present invention also solves
Cutter device is dropped to before sleeve pipe in the prior art, and the binding piece of cutting blade 9 easily collapses out, so as to lead to not sleeve pipe；
When progress infusion pressurization struts cutting blade 9, cutting blade 9 is open configuration by being tied state suddenly change, with internal surface of sleeve pipe
Collision is produced, cutting edge is damaged, extends clipping time, reduce cutting efficiency；And after the completion of cutting, cutting blade 9 relies on
Deadweight, is contracted to during cutter bod 2, has sleeve pipe scrap because containing in buoyant of sea water or cutter bod 2, cutter bod 2 often can not
The problem of completing to withdraw withdrawing.
After cutter device transfers to specified location, seawater is passed through（Drilling fluid also may be used）, when just starting, a part of seawater from
Runner of the runner of extension bar 1 through flow nipple 15, valve rod 10, nozzle 4, piston 6 flows downward, and another part seawater flows through positioning seat 11
On 4 liquid flow holes act on piston, after seawater is full of in the runner of nozzle 4 and piston 6, all seawater are through the He of valve rod 10
Aperture on nozzle 4 flows away downwards.According to Hydrodynamics Theory, due to the setting of nozzle flow channel, seawater produces pressure at nozzle 4
Drop；Valve rod 10 is longer, and seawater can be produced along stroke pressure when flowing through valve rod 10 and lost；When seawater enters nozzle 4 by valve rod 10, stream
Road caliber becomes big suddenly, can produce local pressure loss.The fluid pressure as caused by this three parts pressure drop promotes valve rod 10 with living
Plug 6 is synchronous to be declined, and the lower surface of piston 6 promotes the end of cutting blade 9 descending, due to passing through bearing pin between blade and hydraulic cutter housing
8 connect, then blade opens, Casing-Cutting.
And judge whether cutting is completed to rely on：When the cut is completed, the compression spring 13 of valve stem spacing regulating part 14 is to necessarily
Distance, now valve rod 10 is no longer moved down due to the limitation of locating part 14, and piston 6 continues to move down, and causes valve rod 10
Lower end sphere separates with piston 6 and nozzle 4；After separating, the upper and lower side pressure differential collapses of valve rod 10, and valve rod 10 can recover in spring
It is up in the presence of power.It can be seen from Hydrodynamics Theory, fluid can produce pressure drop at nozzle 4, and this caused pressure drop is bright
The aobvious pressure drop being less than in hydraulic cutter normal operation, therefore may determine that and cut by the significant changes of logging presentation pressure drop on platform
Cut and whether complete.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can
To be improved or converted according to the above description, all these modifications and variations should all belong to the guarantor of appended claims of the present invention
Protect scope.
Claims (10)
1. a kind of new type of deep-water major diameter hydraulic cutter and efficient blade apparatus, including：Extension bar, the cutter for being connected to extension bar lower end
Body, and multiple one end are rotatably connected in the cutting blade of cutter bod, and the extension bar is provided with first flow, the cutter bod upper end and
Lower end is respectively arranged with the second flow channel and third flow channel communicated with first flow, and a piston is provided with the second flow channel,
The piston can move down after being pressurized, and promote cutting blade rotation overhanging, it is characterised in that the outer middle side part longitudinal direction of the cutting blade
A chip area is provided with, and an alloy cutting edge is respectively arranged with the left of chip area and on the lateral surface on right side.
2. new type of deep-water major diameter hydraulic cutter according to claim 1 and efficient blade apparatus, it is characterised in that described
Cutting blade is provided with four, and four cutting blades are arranged at intervals at cutter bod outer rim, so that symmetrically arranged cutting blade is cut
When uniform force.
3. new type of deep-water major diameter hydraulic cutter according to claim 1 and efficient blade apparatus, it is characterised in that described
A contracting knife slide is provided with below piston, the contracting knife slide is movably arranged in third flow channel, and it is used in casing severing
Rise afterwards, promote cutting blade to shrink back in cutter bod；
The contracting knife slide outer rim is arranged with one second flexible member, and second flexible member is pressed when contracting knife slide declines
Contracting, and resetted after piston is no longer pressurized, promote contracting knife slide to rise.
4. new type of deep-water major diameter hydraulic cutter as claimed in any of claims 1 to 3 and efficient blade apparatus, its
It is characterised by, a piston runner is provided through along axis direction in the middle part of the piston；
The new type of deep-water major diameter hydraulic cutter is circumscribed with a pressure-display device with efficient blade apparatus, and it also includes：
The nozzle and valve rod being set in turn in from the bottom to top in second flow channel, the nozzle are fixedly connected on piston upper end, wherein
Portion is provided through a nozzle flow channel communicated with piston runner, and one and nozzle flow channel phase are provided through in the middle part of the valve rod
Logical and diameter is less than the valve rod runner of nozzle flow channel；
The valve rod outer rim is arranged with positioning seat, the first flexible member and valve stem spacing regulating part successively from the bottom to top, described fixed
Position seat is fixedly installed in the middle part of second flow channel, is provided with two symmetrical liquid flow holes in axle center；The valve stem spacing regulating part
Valve rod upper end is connected to, its band ovable valve stem that is pressurized after second flow channel fluid injection declines, while compresses the first flexible member, is reached at it
To before limit inferior position, valve rod is brought into close contact with nozzle, comes from the liquid of valve rod runner to ensure that nozzle flow channel only receives,
After it reaches limit inferior position, valve rod departs from nozzle so that nozzle flow channel can receive the liquid for coming from liquid flow hole, to carry out
Pressure release.
5. new type of deep-water major diameter hydraulic cutter according to claim 4 and efficient blade apparatus, it is characterised in that described
Valve stem spacing regulating part is stop nut, and the stop nut is adjustable to be connected to valve rod upper end, to adjust valve rod and nozzle
Disengaging configuration, so as to carry out the work of the casing-pipe cutting of different size.
6. new type of deep-water major diameter hydraulic cutter according to claim 4 and efficient blade apparatus, it is characterised in that described
Valve rod includes：
The sliding part of positioning seat, the first flexible member and screw limiting part is sequentially passed through, and be integrally formed with the sliding part,
In hemispherical, for being bonded the nozzle sticking part of nozzle, the cross section of the nozzle sticking part is more than the cross section of sliding part.
7. new type of deep-water major diameter hydraulic cutter according to claim 4 and efficient blade apparatus, it is characterised in that described
Valve rod upper end and valve stem spacing regulating part are contained in first flow after extension bar is connected with cutter bod.
8. new type of deep-water major diameter hydraulic cutter according to claim 4 and efficient blade apparatus, it is characterised in that described
New type of deep-water major diameter hydraulic cutter also includes with efficient blade apparatus：
The flow nipple being sheathed at the top of valve rod outer rim, the flow nipple are located in first flow, and its outer rim and extension bar inwall it
Between be provided with a liquid stream gap；
A flow nipple runner is offered along axis direction in the middle part of the flow nipple, the flow nipple runner communicates with valve rod runner,
The change of magnitude of pressure differential can be adjusted by changing flow nipple.
9. new type of deep-water major diameter hydraulic cutter according to claim 4 and efficient blade apparatus, it is characterised in that described
A bushing is provided with second flow channel, the bushing is located at piston outer rim, and its upper surface is bonded with positioning seat lower surface；
The piston outer rim offers one to several support slot, and has sealing ring, the sealing ring by the support slot clamping
Inner side is fastened in support slot, and outside fits in the bushing.
10. new type of deep-water major diameter hydraulic cutter according to claim 9 and efficient blade apparatus, it is characterised in that institute
State piston upper end and be provided with a nozzle holding tank, the nozzle includes：The Piston connecting portion of the nozzle holding tank is contained in, with
And it is exposed to the valve rod sticking part above piston；
A packing ring is provided between the piston upper surface and the valve rod sticking part lower surface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710321267.4A CN107701136B (en) | 2017-05-09 | 2017-05-09 | Novel deep water major diameter hydraulic cutter device |
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|---|---|---|---|
| CN201710321267.4A CN107701136B (en) | 2017-05-09 | 2017-05-09 | Novel deep water major diameter hydraulic cutter device |
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| CN107701136B CN107701136B (en) | 2024-05-07 |
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| CN107701136B (en) | 2024-05-07 |
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