CN105089535B - It is a kind of from rotary cutting tool placed in the middle - Google Patents
It is a kind of from rotary cutting tool placed in the middle Download PDFInfo
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- CN105089535B CN105089535B CN201510388144.3A CN201510388144A CN105089535B CN 105089535 B CN105089535 B CN 105089535B CN 201510388144 A CN201510388144 A CN 201510388144A CN 105089535 B CN105089535 B CN 105089535B
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- mandrel
- housing
- handle
- knife
- cavity
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Abstract
The present invention relates to a kind of from rotary cutting tool placed in the middle, it is characterized in that, top connection, the first housing and the second housing including being in hollow-core construction, the top connection, the second housing and first shell body formation combined cavity, the right-hand member of second housing is provided with plug, it is arranged with the outer wall of second housing in three handle of a knife grooves, handle of a knife groove provided with can folding and unfolding handle of a knife；Also include mandrel, the mandrel is inserted into the combined cavity, reset ring is fixed with the mandrel, the first cavity is formed between the reset ring and the second housing, the mandrel is provided with the first pod apertures and the second pod apertures, first pod apertures are connected with first cavity, and the second cavity is additionally provided between the mandrel and the plug.The beneficial effects of the invention are as follows can keep cutting tool placed in the middle, reduce oil pipe and cut inclined risk, outer oil, sleeve pipe are played a protective role.
Description
Technical field
The present invention relates to oil field equipment field, more particularly to it is a kind of from rotary cutting tool placed in the middle.
Background technology
Cutting tool is connected with oil pipe, drilling rod in being produced in existing oil field uses, and is driven by the rotation of oil pipe, drilling rod
Cutting tool rotates, and realizes oil, the cutting of sleeve pipe.Due to being limited by oil pipe, drilling rod size, cutting tool can not be realized small
The cutting of diameter oil pipe.On the other hand because oil pipe, run of steel are limited, cutting tool lowering velocity is slow, and cutting efficiency is relatively low.
With the development of underground work new technology of preparing, tubing string underground meet card can not unfreezing situation it is more and more, meet
Card position often focuses on horizontal segment, and the internal diameter on the other hand meeting card tubing string is also less and less, it is impossible to connected using oil pipe, drilling rod
Cutting tool is cut.Existing Conventional solutions are to take the cutting mode end-on card tubing string such as chemistry, explosion to be cut
Unfreezing is cut, the damage of outer oil, sleeve pipe is so easily caused, the continuous production of the oil, gas well in later stage is influenceed.
The content of the invention
The present invention is easy to use effectively to protect outer in view of the deficienciess of the prior art, there is provided a kind of compact
Layer oil, sleeve pipe are cut inclined from rotary cutting tool placed in the middle.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：It is a kind of from rotary cutting tool placed in the middle, its feature exists
In, including be in top connection, the first housing and the second housing of hollow-core construction, the top connection and the second housing are connected to
The right-hand member and left end of first housing simultaneously form combined cavity, and the right-hand member of second housing is provided with plug, described second
The outer wall of housing is arranged with three handle of a knife grooves, and being provided with each handle of a knife groove can folding and unfolding handle of a knife；Also include being in hollow-core construction
Mandrel, the mandrel is slidably inserted into the combined cavity, and fixed cover is equipped with resetting ring, the reset on the mandrel
Ring can be slided in the inner wall sealing of the first housing, and it is empty to form first between the left end of the right-hand member for resetting ring and the second housing
Chamber, the mandrel is provided with the first pod apertures and the second pod apertures, and first pod apertures are connected with first cavity, institute
State the ft connection of the second pod apertures and second housing.The shape between the left end and the top connection right-hand member of the reset ring
Into spring cavity, back-moving spring is provided with the spring cavity.
The beneficial effects of the invention are as follows：By being arranged with three handle of a knife grooves in the outer wall of second housing, and each
Being provided with the handle of a knife groove can folding and unfolding handle of a knife；Hold round, play so that three handle of a knifes form a branch after being opened under mandrel effect
The effect of centralizer, can support cutting tool placed in the middle in oil, sleeve pipe, reduce and cut inclined risk, to outer oil, sleeve pipe
Play a protective role.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, the right-hand member diameter of the mandrel is more than left end diameter, in handle of a knife groove location formation arc necking down, institute
Arc necking down is stated to be adapted with the handle of a knife.
Beneficial effect using above-mentioned further scheme is, when mandrel is moved to the left, it is ensured that in the effect of arc necking down
Under three handle of a knifes is synchronously actuated, arc necking down handle of a knife is played symmetric support effect.
Further, it is additionally provided with the second cavity between the mandrel right-hand member and the plug left end.
It is the effect for possessing twin-stage fluid cylinder using the beneficial effect of above-mentioned further scheme, it is internal close also by changing
Envelope form, can be changed into single-stage fluid cylinder from twin-stage fluid cylinder.
Further, the right-hand member of the mandrel is additionally provided with gas pressure relief slot, and when mandrel is moved to high order end, the gas pressure relief slot makes core
The inside of axle and the ft connection of second housing.
Beneficial effect using above-mentioned further scheme is, when mandrel is moved to right-hand member, and the gas pressure relief slot is enclosed in described
On the wall of second housing；When mandrel is moved to left end, the gas pressure relief slot causes combined cavity and turned on outside, so that combination is empty
The rapid pressure release of hydraulic pressure in chamber, the Pressure Fluctuation Signal is transmitted to hydraulic system on well by pipeline, so as to learn that handle of a knife has been opened
Reach maximum magnitude.
Further, bearing pin is provided with the handle of a knife groove, the handle of a knife is hinged by the bearing pin with the second shell body phase.
It is handle of a knife is changed simply, fast using the beneficial effect of above-mentioned further scheme, rotates flexible.
Further, the limiting stand for being used for limiting the handle of a knife maximum opening is provided with the handle of a knife groove.
Beneficial effect using above-mentioned further scheme is, it is ensured that the defined position when handle of a knife is to maximum opening.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is the structural representation of mandrel；
Fig. 3 is working state figure of the present invention：
Fig. 4 for Fig. 3 middle mandrel A-A to diagrammatic cross-section.
In Fig. 1 to Fig. 4,1, top connection；2nd, the first housing；3rd, back-moving spring；4th, ring is resetted；5th, pin；6th, second shell
Body；6-1, handle of a knife groove；7th, bearing pin；8th, handle of a knife；9th, mandrel；9-1, the first pod apertures；9-2, the second pod apertures；9-3, gas pressure relief slot；
9-4, arc necking down；10th, plug；11st, the first cavity；12nd, the second cavity.
Embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
As shown in Figures 1 to 4, it is a kind of from rotary cutting tool placed in the middle, including be in the top connection 1, first of hollow-core construction
The housing 6 of housing 2 and second, the housing 6 of top connection 1 and second is connected to the right-hand member and left end of first housing 2 simultaneously
Combined cavity is formed, the right-hand member of second housing 6 is provided with plug 10, three are arranged with the outer wall of second housing 6
Being provided with handle of a knife groove 6-1, each handle of a knife groove can folding and unfolding handle of a knife 8；Also include the mandrel 9 in hollow-core construction, the mandrel 9 can
Slip is inserted into the combined cavity, and fixed cover is equipped with ring 4 is resetted on the mandrel 9, and the reset ring can be in the first housing 2
Inner wall sealing slide, it is described reset ring right-hand member and the second housing 6 left end between form the first cavity 11, the mandrel 9
The first pod apertures 9-1 and the second pod apertures 9-2 is provided with, first pod apertures are connected with first cavity, described the
Two pod apertures and the ft connection of second housing 6.Formed between the left end and the top connection right-hand member of the reset ring
Back-moving spring 3 is provided with spring cavity, the spring cavity.The reset ring 4 is fixed by pin 5 with the mandrel 9.
The right-hand member diameter of the mandrel is more than left end diameter, and arc necking down, the arc are formed at the handle of a knife groove 6-1 positions
Shape necking down 9-4 is adapted with the handle of a knife 8.
The second cavity 12 is additionally provided between the right-hand member of mandrel 9 and the left end of the plug 10.
The right-hand member of the mandrel is additionally provided with gas pressure relief slot 9-3, and when mandrel 9 is moved to high order end, the gas pressure relief slot 9-3 makes core
The inside of axle and the ft connection of second housing 6.
Bearing pin 7 is provided with the handle of a knife groove, the handle of a knife 8 is hinged by the bearing pin 7 with second housing 6.
The limiting stand for being used for limiting the handle of a knife maximum opening is provided with the handle of a knife groove 6-1.
The operation principle of the present invention is as follows：
It is described to need collocation helicoid hydraulic motor to use from rotary cutting tool placed in the middle.Helicoid hydraulic motor passes through top connection 1 and this hair
Bright connection, when transferred to from rotary cutting tool string placed in the middle need cutting position after, by ground pump liquid, helicoid hydraulic motor is in fluid power
Rotate, rotated so as to drive from rotary cutting tool placed in the middle in the presence of pump.Because the right-hand member of the second housing 6 is provided with plug 10,
Plug 10 plays sealing function.After centre bore of the liquid by mandrel 9, a part of liquid is entered in the first cavity 11, another
Part is entered in the second cavity 12, and Part III flows to tool exterior by the second pod apertures 9-2.According to bernoulli principle liquid
Flow through and pressure differential is produced after the second pod apertures 9-2, i.e., the second pod apertures 9-2 two ends have a hydraulic pressure.Due to
One pod apertures 9-1 and the first cavity 11 together with, after hydraulically full in the first cavity 11, the first pod apertures 9-1 two ends no pressure
Pressure in difference, i.e. the first cavity 11 is equal with the pressure of the centre bore of mandrel 9.First water conservancy diversion (is ignored according to fluid pressure characteristic
Frictional dissipation between hole 9-1 and the second pod apertures 9-2), pressure is equal at the centre bore each point of mandrel 9, i.e. the first cavity 11
Interior pressure is equal with the pressure in the second cavity 12.
Fluid pressure in first cavity 11 acts on the right side section for resetting ring 4, forms first order fluid cylinder.Second cavity
Fluid pressure in 12 acts on its right end face of mandrel 9, forms second level fluid cylinder.Because mandrel 9 can be in top connection 1 and
Freely slid axially in the combined cavity of two housings 6, therefore promote mandrel 9 to be moved to the left trend in the presence of twin-stage fluid cylinder,
Compression spring 3 is compressed when mandrel 9 is moved to the left, and a compression force is produced on the left surface for resetting ring 4, when mandrel 9
When the power to the left being subject to is more than the spring force that compression spring 3 is produced, mandrel 9 is moved to the left, until mandrel 9 is moved to limit position
Put.When mandrel 9 is less than the spring force of the generation of back-moving spring 3 by power to the left, mandrel just moves right, until mandrel right-hand member
Contacted with plug 10.
The pressure that depends mainly on the size of first cavity 11 and second cavity 12 in of the mandrel 9 by power to the left.Pass through
Change from rotary cutting tool structure placed in the middle, single-stage fluid cylinder can be only formed and promote mandrel 9 to left movement.Due to the right-hand member of mandrel 9
Diameter is more than left end, and after mandrel 9 is moved to the left, the necking down right-hand member of mandrel 9 is contacted with handle of a knife 8, and forces handle of a knife 8 around bearing pin 7
Open laterally, 3 handle of a knifes 8 are flared out simultaneously.
The liquid displacement for flowing through mandrel 9 is incrementally increased, the pressure differential that liquid flows through the second pod apertures 9-2 generations just increases therewith
Greatly, the pressure in the first cavity 11 and the second cavity 12 also increases simultaneously, and mandrel 9 is by power to the left under the effect of twin-stage fluid cylinder
It is continuously increased, the compression stress for overcoming back-moving spring 3 to produce, the scope that handle of a knife 8 opens gradually increases, when mandrel 9 is moved to the left to
After maximum displacement, the angle that handle of a knife 8 opens reaches maximum.Due to there is arc necking down 9-4 inside the second housing 6, the right-hand member of mandrel 9
Diameter is more than necking down, and mandrel 9 just stops being moved to the left, if being now further added by discharge capacity, mandrel 9 will not be also moved to the left.The opposing party
Face is provided with gas pressure relief slot 9-3 on the right side of mandrel 9 and just exposed after mandrel 9 reaches high order end position, and from circumgyration incision work placed in the middle
Have ft connection, add liquid and flow through flow pass after mandrel 9, in the case where liquid displacement is constant, now flow through second
The pressure differential that pod apertures 9-2 is produced just is reduced, and system pressure is just reduced, and is pointed out to operator one.The gas pressure relief slot can be along mandrel
Outside is connected with the second cavity 12, radially can also be connected with the endoporus of mandrel.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (5)
1. a kind of from rotary cutting tool placed in the middle, it is characterised in that including being in the top connection of hollow-core construction, the first housing and the
Two housings, the top connection and the second housing are connected to the right-hand member and left end of first housing and form combined cavity,
The right-hand member of second housing is provided with plug, and three handle of a knife grooves are arranged with the outer wall of second housing, each knife
Being provided with handle groove can folding and unfolding handle of a knife；Also include slidably being inserted into the combined cavity in the mandrel of hollow-core construction, the mandrel
In, fixed cover can be slided equipped with ring, the reset ring is resetted in the inner wall sealing of the first housing on the mandrel, the reset ring
Right-hand member and the second housing left end between form the first cavity, the mandrel is provided with the first pod apertures and the second pod apertures,
First pod apertures are connected with first cavity, second pod apertures and the ft connection of second housing；
Formed between the left end and the top connection right-hand member for resetting ring and back-moving spring is provided with spring cavity, the spring cavity；Institute
State and be additionally provided with the second cavity between mandrel right-hand member and the plug left end.
2. it is according to claim 1 from rotary cutting tool placed in the middle, it is characterised in that the right-hand member diameter of the mandrel is more than
Left end diameter, in handle of a knife groove location formation arc necking down, the arc necking down is adapted with the handle of a knife.
3. it is according to claim 1 or 2 from rotary cutting tool placed in the middle, it is characterised in that the right-hand member of the mandrel is also set
There is gas pressure relief slot, when mandrel is moved to high order end, the gas pressure relief slot makes the inside of mandrel and the ft connection of second housing.
4. it is according to claim 1 or 2 from rotary cutting tool placed in the middle, it is characterised in that pin is provided with the handle of a knife groove
Axle, the handle of a knife is hinged by the bearing pin with the second shell body phase.
5. it is according to claim 1 or 2 from rotary cutting tool placed in the middle, it is characterised in that provided with use in the handle of a knife groove
In the limiting stand for limiting the handle of a knife maximum opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510388144.3A CN105089535B (en) | 2015-07-03 | 2015-07-03 | It is a kind of from rotary cutting tool placed in the middle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510388144.3A CN105089535B (en) | 2015-07-03 | 2015-07-03 | It is a kind of from rotary cutting tool placed in the middle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105089535A CN105089535A (en) | 2015-11-25 |
| CN105089535B true CN105089535B (en) | 2017-10-20 |
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ID=54570769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510388144.3A Active CN105089535B (en) | 2015-07-03 | 2015-07-03 | It is a kind of from rotary cutting tool placed in the middle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105089535B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113319935A (en) * | 2021-05-24 | 2021-08-31 | 中国地质大学（北京） | Simple mechanical internal cutting knife |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5732770A (en) * | 1996-08-02 | 1998-03-31 | Weatherford/Lamb, Inc. | Wellbore cutter |
| US5791409A (en) * | 1996-09-09 | 1998-08-11 | Baker Hughes Incorporated | Hydro-mechanical multi-string cutter |
| GB2352747A (en) * | 1999-07-27 | 2001-02-07 | Baker Hughes Inc | Reusable cutting and milling tool |
| CN203685093U (en) * | 2013-12-31 | 2014-07-02 | 中国石油集团渤海钻探工程有限公司 | Downhole bushing end mill |
| CN204754841U (en) * | 2015-07-03 | 2015-11-11 | 杰瑞能源服务有限公司 | From cutting means placed in middle rotatory |
-
2015
- 2015-07-03 CN CN201510388144.3A patent/CN105089535B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5732770A (en) * | 1996-08-02 | 1998-03-31 | Weatherford/Lamb, Inc. | Wellbore cutter |
| US5791409A (en) * | 1996-09-09 | 1998-08-11 | Baker Hughes Incorporated | Hydro-mechanical multi-string cutter |
| GB2352747A (en) * | 1999-07-27 | 2001-02-07 | Baker Hughes Inc | Reusable cutting and milling tool |
| CN203685093U (en) * | 2013-12-31 | 2014-07-02 | 中国石油集团渤海钻探工程有限公司 | Downhole bushing end mill |
| CN204754841U (en) * | 2015-07-03 | 2015-11-11 | 杰瑞能源服务有限公司 | From cutting means placed in middle rotatory |
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| Publication number | Publication date |
|---|---|
| CN105089535A (en) | 2015-11-25 |
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