CN109915020A - A kind of drilling bit for sea-bottom shallow gas hydrates - Google Patents
A kind of drilling bit for sea-bottom shallow gas hydrates Download PDFInfo
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- CN109915020A CN109915020A CN201910147468.6A CN201910147468A CN109915020A CN 109915020 A CN109915020 A CN 109915020A CN 201910147468 A CN201910147468 A CN 201910147468A CN 109915020 A CN109915020 A CN 109915020A
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- gas hydrates
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Abstract
The present invention relates to a kind of drilling bits for sea-bottom shallow gas hydrates comprising spherical bore portion, debris part and caudal connection component；The spherical shape bore portion is provided with three S-shaped wings and arc-shaped chip space, and cutting tooth is disposed on wing, the jet nozzle of addi-tional crusher is disposed in chip space；The debris part includes kidney-shaped groove, three spiral shape wings and chip space, the jet nozzle returned on first order auxiliary landwaste is disposed in its kidney-shaped groove, gage cutters are disposed on spiral wing, chip removal slot tail is disposed with the jet nozzle returned on the auxiliary landwaste of the second level；The caudal connection component setting connection screw thread and breaker slot.The present invention bores the serrated knife wing and spiral shape gauge teeth wing using S-shaped, in conjunction with being returned on jet nozzle auxiliary rock and landwaste, sea-bottom shallow gas hydrates drilling well can be effectively applied to, bottom hole pressure difference is reduced, improve broken rock and row's rock efficiency, and further increase the production efficiency of hydrate.
Description
Technical field
The present invention relates to exploitation of gas hydrates technical fields, in particular relate to a kind of for sea-bottom shallow natural gas
The drilling bit of hydrate.
Background technique
Gas hydrates are commonly called as " combustible ice ", be it is a kind of by water and gas molecule (based on methane) in cryogenic high pressure and
Gas concentration is greater than the crystalline solid substance that is formed under its solubility condition, be distributed mainly on land permafrost band and
In sea-bottom shallow sediment layer, wherein there are Yu Haiyangs for 99% natural gas hydrate resources.The combustible ice of unit volume, which burns, to be produced
Raw heat is 164 times of same volume natural gas, and the CO produced after burning2Greenhouse gases are less, according to the whole world according to a preliminary estimate
Flammable ice reserves, up to as many as 2 times of existing explored fossil energy gross reserves, being considered 21 century most by countries in the world has
The clean type of effect takes over the energy, and countries in the world are trying to explore how efficiently to exploit combustible ice resource.
In the attached deposit rock stratum for being stored in 150 ~ 600m of seabed of sea-bottom shallow gas hydrates, shallow with buried depth,
The features such as mineral reserve are loose, weak cementing or not cementing, the basic ideas of exploitation are borrow Land petroleum horizontal drilling technology, and sharp
Hydrate rock stratum drilling is crushed with modes such as machinery rotation and water jets, expands wellbore.Thus design novel applicable Yu Haiyang day
The drilling bit of right gas hydrate, will provide reliable solution route for the high-efficiency mining of hydrate, be the commercialization of hydrate
Exploitation provides technical guarantee；Patent CN201410814838.4 has invented a kind of for exploiting the drill bit of combustible ice, which sets
A kind of bowl-type structure drill bit that can be used for horizontal and vertical drilling is counted, it includes cutting tips and row to cut part, can be realized
The broken and collection of submarine surface combustible ice.It is multiple that patent CN201810823654.2 has invented a kind of sea bed gas hydrate layer
Box-like drill bit, a kind of three-decker formula comprising collar hole bit body, reaming bit body and second-time breakage mechanism of the Patent design
Drill bit can be realized the broken and refinement of hydrate rock stratum.The above patent is only improved from drill bit structure, is not bound with
The physical property feature of hydrate itself carries out the design of multiple combinations mode drill bit, thus the efficiency crushing of hydrate rock stratum difficult to realize
Drilling, it is very limited to the contribution for improving hydrate production efficiency, and land frozen soil hydrate cannot be suitable for well and exploited.
Summary of the invention
In view of the above technical problems, the invention proposes a kind of drilling bit for sea-bottom shallow gas hydrates,
The serrated knife wing and spiral shape gauge teeth wing are bored using S-shaped, and jet nozzle injection fluid is combined to carry out efficient rock-breaking, is used simultaneously
It is returned on two-stage oblique fire flow nozzle auxiliary landwaste is quick, the crushing efficiency of drill bit drilling sea-bottom deposit nitride layer can be effectively improved,
Further increase the production efficiency of hydrate.
The purpose of the present invention is achieved through the following technical solutions: a kind of drilling well for sea-bottom shallow gas hydrates
Drill bit, it is characterised in that: it is made of spherical bore portion, debris part and caudal connection component, the spherical brill
Bore portion is connected with the monoblock cast of debris part or using welding manner；S-shaped knife is provided on the spherical shape bore portion
The wing and arc-shaped chip space, bulb front end are disposed with a cutting pointed tooth, are disposed with several cutting tooths on the S-shaped wing,
Several jet nozzles for addi-tional crusher rock are provided in the arc-shaped chip space；The debris part includes waist
Connected in star, spiral shape wing and spiral shape chip space are circumferentially evenly arranged several first order auxiliary rocks in the kidney-shaped groove
The oblique fire flow nozzle returned on bits, is disposed with several gage cutters on the spiral shape wing, after the spiral shape chip space
The oblique fire flow nozzle returned on several second level auxiliary landwaste is arranged on end and drill bit afterbody inclined-plane；The caudal connection component
It is provided with connection screw thread and breaker slot.
The rounded bulb shape of overall structure shape of the spherical shape bore portion and S-shaped wing.
The number of the S-shaped wing, the arc-shaped chip space and the spiral shape wing and the spiral shape chip space
Amount is three, and is uniformly distributed along drill bit circumferencial direction.
The axis angle of the spiral shape wing and the drill bit is β, and the value range of screw clamp angle beta is 5 ° ~ 30 °.
The whole two-stage oblique fire flow nozzle returned along drilling direction, the auxiliary landwaste of the injection direction of the jet nozzle
Injection direction it is whole along drilling opposite direction.
It is α that inclination angle is returned on first order oblique fire flow nozzle and second level oblique fire flow nozzle, value range is 10 ° ~
40°。
The beneficial effects of the present invention are:
1. having and creeping into since drill bit drilling section of the present invention in bulb shape and there is S-shaped rounding off to bore the serrated knife wing
Cheng Pingwen, advantage with small vibration, and consider that hydrate is easy to the physical property feature of fragmentation, kata-rocks are efficiently sprayed in conjunction with jet nozzle
Layer drilling, further increases the rate of penetration of hydrate rock stratum.
2. there is the present invention the long gauge wing of spiral shape can preferably keep drilling shaft lining stability, lesser helical angle
Be conducive to landwaste and be discharged backward along helix, is suitble to seabed long range horizontal drilling hydrate layer.
3. the present invention uses the oblique jet nozzle arrangement of two-stage, power is returned on the upward offer landwaste of classification and is increased
Add, further decrease bottom hole pressure difference, realize and efficiently take rock, Pai Yan, accelerate circulation of drilling fluid, improves bit speed.
4. the present invention uses three wing cutting structures, there is larger chip space, it can be achieved that quickly cutting.
5. drill bit structure of the invention can be applied to drilling well exploitation of the land permafrost with gas hydrates simultaneously.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is present invention looks up structural representation of the invention；
Fig. 3 is normal axomometric drawing of the invention；
In figure: I-spherical bore portion, II-debris part, III-caudal connection component, 1-S shape wing, the arc-shaped row of 2-
Bits slot, 3- cutting pointed tooth, 4- cutting tooth, 5- jet nozzle, 6- kidney-shaped groove, 7- oblique fire flow nozzle A, 8- spiral shape chip space,
9- spiral shape wing, 10- gage cutters, 11- drill bit afterbody inclined-plane, 12- slant flow nozzle B, 13- breaker slot, 14- connection spiral shell
Line returns inclination angle, β-spiral wing spiral angle on α-oblique fire flow nozzle.
Specific embodiment
The present invention is further illustrated with attached drawing combined with specific embodiments below.
It is as depicted in figs. 1 and 2: a kind of drilling bit for sea-bottom shallow gas hydrates, it is characterised in that: the brill
The overall structure shape of head is in " cucurbit " shape, is grouped as by spherical bore portion, debris part and tail connector, institute
Spherical bore portion is stated to be connected with the monoblock cast of debris part or using welding manner；It is arranged on the spherical shape bore portion
There are S-shaped wing (1) and arc-shaped chip space (2), bulb front end is disposed with a cutting pointed tooth (3), the S-shaped wing (1)
On be disposed with several cutting tooths (4), the jet nozzle of several addi-tional crusher rock stratum is provided in the arc-shaped chip space (2)
(5)；The debris part includes that kidney-shaped groove (6), spiral shape wing (9) and spiral shape chip space (8), the kidney-shaped are recessed
The oblique fire flow nozzle A(7 returned on several first order auxiliary landwaste is circumferentially evenly arranged in slot (6)), the spiral shape wing
(9) it is disposed on several gage cutters (10), on the rear end and drill bit afterbody inclined-plane (11) of the spiral shape chip space (8)
It is disposed with the oblique fire flow nozzle B(12 returned on several second level auxiliary landwaste)；The caudal connection component is disposed with connection screw thread
(14) and breaker slot (13).
The rounded bulb shape of overall structure of the spherical shape bore portion and S-shaped wing (1), wing circumferentially uniform cloth
It sets, it is adaptable to shaft bottom in drilling process, have many advantages, such as that drilling is steady, vibration is smaller, small to the disturbance on stratum；Together
When consider weak cementing, the physical property feature such as be easy to fragmentation of hydrate, carried out in chisel edge cooperation jet nozzle (5) injection fluid high
Auxiliary rock, and bottom-hole cleaning landwaste and cooling drill bit are imitated, chisel edge can be further increased in the broken of hydrate rock stratum
Efficiency and rate of penetration.
The axis angle of the spiral shape wing (9) and the drill bit is β, and the value range of screw clamp angle beta be 5 ° ~
30 °, lesser helical angle can reduce the frictional resistance between landwaste and drill bit, make drilling fluid and landwaste during upper return
It is more smooth.
The injection direction of the jet nozzle (5) is whole along drilling direction；The oblique fire flow nozzle A returned on the auxiliary landwaste
(7) identical with the injection direction of oblique fire flow nozzle B(12) and whole along drilling opposite direction；The oblique fire flow nozzle A(7) and
The oblique fire flow nozzle B(12) on to return inclination angle be α, value range is 10 ° ~ 40 °；In the centre and tail portion of drill bit, divide
Two-stage distributed oblique fire flow nozzle is not set, sprays that be drawn up power caused by fluid bigger, well can be further decreased
Base pressure is poor, realizes the drilling well demand efficiently taken rock and arrange rock, accelerates circulation of drilling fluid, improves bit speed.
Preferably, the S-shaped wing (1), the arc-shaped chip space (2) and the spiral shape wing (9) and described
The quantity of spiral shape chip space (8) is three, and is uniformly distributed along drill bit circumferencial direction, and drill bit wing negligible amounts are to increase
The chip space of big drill bit realizes quickly cutting drilling.
Preferably, the oblique fire returned on first order auxiliary landwaste there are six being circumferentially evenly arranged in the kidney-shaped groove (6)
Flow nozzle A(7).
Drill bit structure of the invention can be suitable for drilling well exploitation of the land permafrost with gas hydrates simultaneously.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (8)
1. a kind of drilling bit for sea-bottom shallow gas hydrates, it is characterised in that: it include spherical bore portion and
Debris part；S-shaped wing (1) and arc-shaped chip space (2), spherical bore portion are provided on the spherical shape bore portion
Bulb front end be additionally provided with cutting pointed tooth (3), be provided with several cutting tooths (4) on the S-shaped wing (1), it is described arc-shaped
Several jet nozzles (5) are provided in chip space (2)；The debris part includes kidney-shaped groove (6), spiral shape wing
(9) and spiral shape chip space (8) several oblique fire flow nozzle A(7 circumferentially, have been evenly arranged in the kidney-shaped groove (6)), it is described
It is provided on spiral shape wing (9) several gage cutters (10), the rear end of the spiral shape chip space (8) and drill bit afterbody are oblique
Several oblique fire flow nozzle B(12 are arranged on face (11)).
2. a kind of drilling bit for sea-bottom shallow gas hydrates according to claim 1, it is characterised in that: institute
State the rounded bulb shape of overall structure shape of spherical bore portion and S-shaped wing (1).
3. a kind of drilling bit for sea-bottom shallow gas hydrates according to claim 1, it is characterised in that: institute
State S-shaped wing (1), the arc-shaped chip space (2) and the spiral shape wing (9) and the spiral shape chip space (8)
Quantity is three, and is distributed along drill bit even circumferential.
4. a kind of drilling bit for sea-bottom shallow gas hydrates according to claim 1, it is characterised in that: institute
The axis angle for stating spiral shape wing (9) and the drill bit is β, and the value range of screw clamp angle beta is 5 ~ 30 °.
5. a kind of drilling bit for sea-bottom shallow gas hydrates according to claim 1, it is characterised in that: institute
The injection direction for stating jet nozzle (5) is whole along drilling direction, the oblique fire flow nozzle A(7) and slant flow nozzle B(12) spray
It is whole along drilling opposite direction to penetrate direction.
6. a kind of drilling bit for sea-bottom shallow gas hydrates according to claim 1, it is characterised in that: institute
State oblique fire flow nozzle A(7) and the oblique fire flow nozzle B(12) on return inclination angle as α, α value range is 10 ~ 40 °.
7. a kind of drilling bit for sea-bottom shallow gas hydrates according to claim 1, it is characterised in that: should
Drill bit further includes caudal connection component, and overall structure shape is in " cucurbit " shape, and the caudal connection component setting is arranged in spiral
It considers upper to be worth doing, is provided with connection screw thread (14) and breaker slot (13).
8. a kind of drilling bit for sea-bottom shallow gas hydrates according to claim 1, it is characterised in that: institute
Spherical bore portion is stated to be connected with debris part monoblock cast or using welding manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910147468.6A CN109915020B (en) | 2019-02-27 | 2019-02-27 | Drilling bit for seabed shallow layer natural gas hydrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910147468.6A CN109915020B (en) | 2019-02-27 | 2019-02-27 | Drilling bit for seabed shallow layer natural gas hydrate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109915020A true CN109915020A (en) | 2019-06-21 |
| CN109915020B CN109915020B (en) | 2020-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910147468.6A Expired - Fee Related CN109915020B (en) | 2019-02-27 | 2019-02-27 | Drilling bit for seabed shallow layer natural gas hydrate |
Country Status (1)
| Country | Link |
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| CN (1) | CN109915020B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577214A (en) * | 2020-06-24 | 2020-08-25 | 中国海洋石油集团有限公司 | Water jet injector head for seabed natural gas hydrate solid fluidization exploitation |
| CN113503132A (en) * | 2021-08-11 | 2021-10-15 | 中海石油深海开发有限公司 | Drill bit equipment for deepwater drilling and drilling method |
| CN114109257A (en) * | 2021-11-22 | 2022-03-01 | 湖南师范大学 | Water jet assisted hobbing cutter drilling device |
| CN116717186A (en) * | 2023-08-09 | 2023-09-08 | 陕西星通石油工程技术有限公司 | PDC drill bit with stratum information acquisition |
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| US20050103527A1 (en) * | 2003-11-13 | 2005-05-19 | Church Kris L. | Dual wall drill string assembly |
| CN102164698A (en) * | 2008-09-23 | 2011-08-24 | 伊利诺斯工具制品有限公司 | Rock drill bit |
| CN204024491U (en) * | 2014-09-03 | 2014-12-17 | 中国石油集团渤海钻探工程有限公司 | For the spinning jet bit of radially horizontal well |
| JP5704589B1 (en) * | 2014-11-28 | 2015-04-22 | 株式会社センリョウ | Submarine drilling equipment |
| CN105257218A (en) * | 2015-11-02 | 2016-01-20 | 西南石油大学 | Self-propelling drill bit |
| CN109025830A (en) * | 2018-08-24 | 2018-12-18 | 西南石油大学 | A kind of deep water shallow layer gas hydrate solid state fluidizing mine drilling bit |
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- 2019-02-27 CN CN201910147468.6A patent/CN109915020B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20050103527A1 (en) * | 2003-11-13 | 2005-05-19 | Church Kris L. | Dual wall drill string assembly |
| CN102164698A (en) * | 2008-09-23 | 2011-08-24 | 伊利诺斯工具制品有限公司 | Rock drill bit |
| CN204024491U (en) * | 2014-09-03 | 2014-12-17 | 中国石油集团渤海钻探工程有限公司 | For the spinning jet bit of radially horizontal well |
| JP5704589B1 (en) * | 2014-11-28 | 2015-04-22 | 株式会社センリョウ | Submarine drilling equipment |
| CN105257218A (en) * | 2015-11-02 | 2016-01-20 | 西南石油大学 | Self-propelling drill bit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577214A (en) * | 2020-06-24 | 2020-08-25 | 中国海洋石油集团有限公司 | Water jet injector head for seabed natural gas hydrate solid fluidization exploitation |
| CN113503132A (en) * | 2021-08-11 | 2021-10-15 | 中海石油深海开发有限公司 | Drill bit equipment for deepwater drilling and drilling method |
| CN114109257A (en) * | 2021-11-22 | 2022-03-01 | 湖南师范大学 | Water jet assisted hobbing cutter drilling device |
| CN114109257B (en) * | 2021-11-22 | 2022-09-27 | 湖南师范大学 | Water jet assisted hobbing cutter drilling device |
| CN116717186A (en) * | 2023-08-09 | 2023-09-08 | 陕西星通石油工程技术有限公司 | PDC drill bit with stratum information acquisition |
| CN116717186B (en) * | 2023-08-09 | 2023-10-20 | 陕西星通石油工程技术有限公司 | PDC drill bit with stratum information acquisition |
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| Publication number | Publication date |
|---|---|
| CN109915020B (en) | 2020-09-11 |
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