CN209011760U - A kind of extended reach well back reaming PDC drill bit - Google Patents
A kind of extended reach well back reaming PDC drill bit Download PDFInfo
- Publication number
- CN209011760U CN209011760U CN201821617792.7U CN201821617792U CN209011760U CN 209011760 U CN209011760 U CN 209011760U CN 201821617792 U CN201821617792 U CN 201821617792U CN 209011760 U CN209011760 U CN 209011760U
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- CN
- China
- Prior art keywords
- drill bit
- wing
- extended reach
- back reaming
- pdc drill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of extended reach well back reaming PDC drill bits, including drill bit, wing and connector, the connector is set to drill bit lower end, the wing is connected on the outside of drill bit, gauge teeth and cutting tooth are connected separately on the outside of the wing and gauge teeth and cutting tooth are equidistantly staggeredly distributed with multiple groups, the wing outer surface is provided with step, the ledge surface is connected with diamond compact and diamond compact is specifically provided with three groups, impurity discharging passage is provided between the gauge teeth and cutting tooth, the impurity discharging passage two sides are provided with nozzle, the drill bit lower end is connected with telescopic mast, the utility model is by designing PDC drill bit wing upper step using slope, the frictional resistance of drill bit step and borehole wall when can reduce back reaming, and three particle diamond composite sheets are connected in step plane, cutting tooth can be increased With the contact area of the top borehole wall, it is ensured that reaming efficiency, while step is protected to the greatest extent, extend the PDC drill bit service life.
Description
Technical field
The utility model relates to drilling tool technical field, specially a kind of extended reach well back reaming PDC drill bit.
Background technique
With economic development, the mankind are always maintained at growth trend to oil demand, and so-called oil-gas field development is exactly according in detail
Achievement and necessary productivity development experiments are visited, to the oil gas field with industrial value on the basis of comprehensive study, from oil gas
The actual conditions and production law in field are set out, and are worked up reasonable development plan and are built and gone into operation to oil gas field, make oil
Scheduled production capacity and economic effect long-term production are pressed in gas field, until end-of-development, Oilfield Development Engineering is knowledge-intensive, skill
Art is intensive, intensive capital industry, is the multi-disciplinary huge engineering of integrated application.It relate generally to geology, physical prospecting, drilling well,
Oil recovery, oil reservoir, storage and transportation, economy, management, water power and civil engineering department etc., extended reach well are a kind of important means of oil-gas field development,
Its construction characteristic is that displacement is big, and difficulty of construction is big, and drilling period is long, therefore necessarily cost is caused to increase, and in order to effectively subtract
Low cost shortens drilling period, must be indispensable to the use of PDC drill bit.
The construction characteristic of PDC drill bit be it is faster than rock bit rate of penetration, the underground work service life is long, and risk is low, and well
Eye type profile is oval, therefore drilling well back reaming technique must be indispensable in extended reach well construction, but existing routine PDC
Drill bit does not have back reaming function, causes the excessive cutting to the borehole wall to destroy, it is difficult to repair the borehole wall, while to PDC drill bit wing
Vertex abrasion is serious, and service life of equipment reduces, and construction cost additionally increases.For this purpose, we release a kind of extended reach well back water
Eye PDC drill bit.
Utility model content
The purpose of this utility model is to provide a kind of extended reach well back reaming PDC drill bits, to solve above-mentioned background technique
The problem of middle proposition.
To achieve the above object, the utility model provides the following technical solutions: a kind of extended reach well back reaming PDC drill bit,
Including drill bit, wing and connector, the connector is set to drill bit lower end, and the wing is connected on the outside of drill bit, outside the wing
Side is connected separately with gauge teeth and cutting tooth and gauge teeth and cutting tooth are equidistantly staggeredly distributed with multiple groups, table on the outside of the wing
Face is provided with step, and the ledge surface is connected with diamond compact and diamond compact is specifically provided with three groups, described
Impurity discharging passage is provided between gauge teeth and cutting tooth, the impurity discharging passage two sides are provided with nozzle, and the drill bit lower end connects
It is connected to telescopic mast and drill bit by telescopic mast is connected with cushion chamber, the telescopic mast lower end is connected with wing seat, and the connector connects
It is connected to cushion chamber lower end, is connected with limiting tooth on the outside of the connector.
Preferably, inner support axis is connected on the inside of the wing and wing is connect by inner support axis with drill bit.
Preferably, the drill bit internal is provided with reset spring and telescopic mast is movably connected on reset spring lower end.
Preferably, the step is designed using slope, and angle design is 110 °.
Preferably, diamond compact is used using oblique straight line cloth tooth and diamond compact in the step plane
20 ° of back rake angle designs.
Preferably, the cushion chamber is internally provided with resilient cushion and resilient cushion is specially rubber material.
Compared with prior art, the utility model has the beneficial effects that the utility model is by by PDC drill bit wing top
Step is designed using slope, the frictional resistance of drill bit step and borehole wall when can reduce back reaming, and three are connected in step plane
Particle diamond composite sheet uses oblique straight line cloth tooth, can increase the contact area of cutting tooth Yu the top borehole wall, it is ensured that reaming
Efficiency, while step is protected to the greatest extent, extend the PDC drill bit service life, furthermore the diamond compact is set using 20 ° of back rake angles
Meter, it is possible to reduce the excessive cutting of the upper borehole wall is destroyed, plays the role of repairing the borehole wall.
Detailed description of the invention
Fig. 1 is the utility model overall structure diagram；
Fig. 2 is the utility model drill bit structure schematic diagram；
Fig. 3 is the utility model wing structure schematic diagram；
In figure: 1 drill bit, 2 wings, 3 connectors, 4 gauge teeths, 5 cutting tooths, 6 inner support axis, 7 nozzles, 8 reset springs, 9 knives
Wing seat, 10 telescopic masts, 11 impurity discharging passages, 12 limiting tooths, 13 steps, 14 diamond compacts, 15 cushion chambers, 16 resilient cushions.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1-3 is please referred to, the utility model provides a kind of technical solution: a kind of extended reach well back reaming PDC drill bit, including
Drill bit 1, wing 2 and connector 3, the connector 2 are set to 1 lower end of drill bit, and the wing 2 is connected to 1 outside of drill bit, the wing
2 outsides are connected separately with gauge teeth 4 and cutting tooth 5 and gauge teeth 4 and cutting tooth 5 are equidistantly staggeredly distributed with multiple groups, the knife
2 outer surface of the wing is provided with step 13, and 13 surface of step is connected with diamond compact 14 and diamond compact 14 has
Body is provided with three groups, and impurity discharging passage 11 is provided between the gauge teeth 4 and cutting tooth 5, and 11 two sides of impurity discharging passage are all provided with
It is equipped with nozzle 7,1 lower end of drill bit is connected with telescopic mast 10 and drill bit 1 passes through telescopic mast 10 and is connected with cushion chamber 15, described to stretch
10 lower end of contracting column is connected with wing seat 9, and the connector 3 is connected to 15 lower end of cushion chamber, is connected with limiting tooth on the outside of the connector 3
12。
Further, it is connected with inner support axis 6 on the inside of the wing 2 and wing 2 is connect by inner support axis 6 with drill bit 1,
Using inner support axis 6 to protection is supported inside wing 2, the use intensity of wing 2 is promoted, enhances useful life longevity.
Further, the drill bit 1 is internally provided with reset spring 8 and telescopic mast 10 is movably connected under reset spring 8
End forms certain buffer protection effect to drill bit 1 in carrying out oilfield drilling use.
Further, the step 13 is designed using slope, and angle design is 110 °, when reducing back reaming drill bit step with
The frictional resistance of the borehole wall, while can satisfy the requirement of arrangement back reaming composite sheet.
Further, diamond compact 14 uses oblique straight line cloth tooth and diamond compact in 13 plane of step
14, using 20 ° of back rake angle designs, can increase the contact area of cutting tooth 5 Yu the top borehole wall, it is ensured that reaming efficiency, utmostly
Protection step, extend the PDC drill bit service life, and can reduce to the upper borehole wall excessive cutting destruction, play reparation the borehole wall work
With.
Further, the cushion chamber 15 is internally provided with resilient cushion 16 and resilient cushion 16 is specially rubber material, antifriction
Wiping performance is strong, and using effect is more preferably.
Specifically, generating coordinated operation, herein mistake in use, the PDC drill bit 1 carries out driving structure connection at connector 3
Cheng Zhong is designed 1 wing of PDC drill bit, 2 upper step, 13 position using slope, when can reduce back reaming at 1 step 13 of drill bit
With the frictional resistance of the borehole wall, and three particle diamond composite sheets 14 are connected in 13 plane of step.The back reaming composite sheet uses specification
Parameter is as shown in the table:
| Bit size | Creep into compact size | The design of back reaming compact size |
| 444.5mm | 19mm | 16mm |
| 311.1mm | 19mm/16mm | 13mm |
| 215.9mm | 16mm | 13mm |
| 152.4mm | 13mm | 11mm |
It uses oblique straight line cloth tooth, can increase the contact area of cutting tooth 5 Yu the top borehole wall, it is ensured that reaming efficiency,
It protects step 13 to the greatest extent simultaneously, extends 1 service life of PDC drill bit, furthermore the diamond compact 14 is set using 20 ° of back rake angles
Meter, it is possible to reduce the excessive cutting of the upper borehole wall is destroyed, plays the role of repairing the borehole wall, to substantially increase the extended reach well
The using effect of back reaming PDC drill bit and its adaptability and practicability in practical applications.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (6)
1. a kind of extended reach well back reaming PDC drill bit, including drill bit (1), wing (2) and connector (3), connector (3) setting
In drill bit (1) lower end, the wing (2) is connected on the outside of drill bit (1), it is characterised in that: is separately connected on the outside of the wing (2)
There are gauge teeth (4) and cutting tooth (5) and gauge teeth (4) and cutting tooth (5) are equidistantly staggeredly distributed with multiple groups, the wing (2)
Outer surface is provided with step (13), and step (13) surface is connected with diamond compact (14) and diamond compact
(14) three groups specifically are provided with, are provided with impurity discharging passage (11) between the gauge teeth (4) and cutting tooth (5), the impurities removal is logical
Road (11) two sides are provided with nozzle (7), and drill bit (1) lower end is connected with telescopic mast (10) and drill bit (1) passes through telescopic mast
(10) it is connected with cushion chamber (15), telescopic mast (10) lower end is connected with wing seat (9), and the connector (3) is connected to buffering
Chamber (15) lower end, connector (3) outside are connected with limiting tooth (12).
2. a kind of extended reach well back reaming PDC drill bit according to claim 1, it is characterised in that: on the inside of the wing (2)
It is connected with inner support axis (6) and wing (2) is connect by inner support axis (6) with drill bit (1).
3. a kind of extended reach well back reaming PDC drill bit according to claim 1, it is characterised in that: the drill bit (1) is internal
It is provided with reset spring (8) and telescopic mast (10) is movably connected on reset spring (8) lower end.
4. a kind of extended reach well back reaming PDC drill bit according to claim 1, it is characterised in that: the step (13) is adopted
It is designed with slope, angle design is 110 °.
5. a kind of extended reach well back reaming PDC drill bit according to claim 1, it is characterised in that: the step (13) is flat
Diamond compact (14) is using oblique straight line cloth tooth in face and diamond compact (14) is using 20 ° of back rake angle designs.
6. a kind of extended reach well back reaming PDC drill bit according to claim 1, it is characterised in that: the cushion chamber (15)
Being internally provided with resilient cushion (16) and resilient cushion (16) is specially rubber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821617792.7U CN209011760U (en) | 2018-10-02 | 2018-10-02 | A kind of extended reach well back reaming PDC drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821617792.7U CN209011760U (en) | 2018-10-02 | 2018-10-02 | A kind of extended reach well back reaming PDC drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209011760U true CN209011760U (en) | 2019-06-21 |
Family
ID=66837607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821617792.7U Expired - Fee Related CN209011760U (en) | 2018-10-02 | 2018-10-02 | A kind of extended reach well back reaming PDC drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209011760U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685141A (en) * | 2021-08-05 | 2021-11-23 | 深圳戴尔蒙德科技有限公司 | High-hardness and high-wear-resistance composite coating drill bit |
-
2018
- 2018-10-02 CN CN201821617792.7U patent/CN209011760U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685141A (en) * | 2021-08-05 | 2021-11-23 | 深圳戴尔蒙德科技有限公司 | High-hardness and high-wear-resistance composite coating drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190621 Termination date: 20201002 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |