CN207048680U - Reaming while drilling drill bit - Google Patents
Reaming while drilling drill bit Download PDFInfo
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- CN207048680U CN207048680U CN201720685645.2U CN201720685645U CN207048680U CN 207048680 U CN207048680 U CN 207048680U CN 201720685645 U CN201720685645 U CN 201720685645U CN 207048680 U CN207048680 U CN 207048680U
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Abstract
The utility model discloses a kind of reaming while drilling drill bit, reaming while drilling drill bit is mainly made up of drill body, wiper block, reaming hole gear wheel, gear wheel nozzle, pilot bit, neck eye nozzle.Reaming while drilling drill bit is arranged on BHA bottom, combined by rock bit and PDC drill bit, PDC drill bit bores neck eye, rock bit carries out reaming hole, this step-type drilling, not only improving reduces bottom rock crushing strength, improves reaming hole efficiency, and can plays the technical advantage of two kinds of drill bits, reduces influence of the vibration to drill bit.Reaming while drilling drill bit be applied to it is soft or hard staggeredly, a variety of stratum such as interlayer, integrate rock bit and PDC drill bit broken rock advantage, there is high the pressure of the drill, low torque, with small vibration, available for deep-well, ultradeep well, complex structural well wellbore construction.Meanwhile reaming while drilling drill bit also has the advantages of simple in construction, easy to operate, to be easily installed, be safe and reliable, is easy to batch micro operations and a wide range of popularization and application.
Description
Technical field
Oil and gas well drilling, CBM Drilling, geological prospecting, mine boring tool field are the utility model is related to, especially
It is a kind of reaming while drilling drill bit.
Background technology
During oil and gas well drilling, geological prospecting, mine probing, reaming while drilling technology can be in the same of drilling
When expand borehole diameter, not only contribute to improve cementing quality, and help to strengthen the security of well control, thus obtained wide
General application.But oil exploration and development fields constantly expand, with deep-well, ultradeep well, horizontal branch well, casing window sidetracking
The application of the complex drilling technology such as well, slim hole well, higher requirement is provided with to underreamer work.Generally adopt at present both at home and abroad
Diplocardia re-drill bit shows as that torque-on-bit is big, it is serious to suppress bouncing of drilling tool, drill bit and drill string are caused not in drilling process
With the infringement of degree, main reason is that pilot bit and re-drill bit use integral type PDC structures so that drill bit is integrally right
Stratum adaptability is poor, and stress is complicated, easily drills out spiral shape well, causes wellbore quality poor, gives follow-up work band
Come safety and hidden danger of quality；And conventional gear wheel reaming hole device has that cost is low, process for machining and manufacturing is ripe, rock bit is applicable
In formation volumes are wide the features such as, but due to being limited by gear wheel size so that reaming hole task difficulty is larger.
Also mainly use special reaming while drilling work in addition to reaming while drilling is carried out using one-piece drill bit both at home and abroad at present
Tool, its driving torque will take a part of moment of torsion of pilot bit, its result all from well head or mud motor
Necessarily cause pilot bit broken rock moment of torsion to reduce, reduce reaming hole broken rock speed, and reamer rotary speed is slower, it is difficult to which performance is cut
The efficient rock-breaking ability of tooth is cut, have impact on reaming hole broken rock operating efficiency.As can be seen here, at present reaming while drilling device both domestic and external still
The technological requirement of deep-well, ultra-deep well drilling, complex structural well can not effectively be met, therefore be badly in need of design research and development one kind to reduce
Reaming hole broken rock load, that is, reduce bottom rock crushing strength, improve drilling efficiency, and can play simultaneously rock bit with
The technical advantage of PDC drill bit, meets the reaming while drilling technological requirement of all kinds well such as straight well, sidetracked hole, while also wants structure
Simply, dependable performance, the convenient reaming while drilling drill bit of attended operation, this for lifted China's deep-seated oil gas reservoir Efficient Development brill
Well technology level, enhance our international competitiveness with important economic value and social value.
Utility model content
The purpose of this utility model is to play the efficient rock-breaking energy of Cutter during reaming hole to greatest extent
Power, the influence of drill bit stick slip vibration is reduced, improve the efficiency of reaming while drilling operation, improve the complex structural wells such as deep-well, ultradeep well
Cementing quality and well control safety, there is provided reaming while drilling drill bit.
Technical scheme is used by the utility model solves its technical problem：
Reaming while drilling drill bit, including drill body 1 and with the pilot bit 6 of drill body integrally connected, neck eye nozzle 7,
The axial machining center hole 2 of drill body 1, neck eye nozzle 7 is arranged in pilot bit 6, and is connected with centre bore 2, wherein：Boring
Wiper block 3 and reaming hole gear wheel 4, gear wheel nozzle 5 are additionally provided with outside head body 1；The reaming hole gear wheel 4 is mainly by gear wheel and bit leg group
Into its bit leg is exactly a part for drill body, and reaming hole gear wheel 4 is between wiper block 3 and pilot bit 6；The gear wheel spray
Mouth 5 is arranged on the drill body 1 of the bottom of reaming hole gear wheel 4, is connected with centre bore 2, and the upward work to reaming hole gear wheel 4
Face.
Such scheme further comprises：
The wiper block 3 is 3-5 blocks, and the uniform periphery of drill body 1, and friction-proof piece is inlayed in the outer surface of wiper block 3.
The reaming hole gear wheel 4 is 3-5, and is distributed on the periphery of drill body 1, and each reaming hole gear wheel 4 is corresponding at least one
Gear wheel nozzle 5.
The axis of the reaming hole gear wheel 4 and the axis of drill body 1 are in 25-75 ° of angle.
Pilot bit preferably leads a PDC drill bit.
Reaming while drilling bit operation principle and technical advantage of the present utility model are mainly reflected in：
During drillng operation, reaming while drilling drill bit is connected to the lower end of BHA, applies the pressure of the drill and moment of torsion by BHA
Driving rotation, neck eye PDC drill bit contact bottom rock and start broken rock, because its external diameter is small, according to mechanics principle, cause first
Lead the pressure in the unit area of eye PDC drill bit bottom surface big, because the rock breaking mechanism of PDC drill bit is that plow formula is combined with shearing
Broken rock mode, therefore under the conditions of high the pressure of the drill is high-revolving, lead the efficiency of breaking rock of eye PDC drill bit very high, soon in well
Bottom, which first drills out, one small leads eye.With the progress of drilling process, reaming hole gear wheel contacts shaft bottom therewith, due to bottom section rock
Through being eliminated, therefore reaming hole gear wheel only crushes remaining step body rock, because the rock breaking mechanism of gear wheel is crushing and shearing phase
With reference to the pressure of the drill is higher, and rotating speed is faster, and the efficiency of breaking rock of gear wheel is also faster.At the same time, because neck eye PDC drill bit is in shaft bottom subdrilling
Go out the one small part internal stress led eye, release rock, reduce its crushing strength, be more favorably improved reaming hole gear wheel
The efficiency of broken step body rock.
Reaming while drilling drill bit is not the simple combination of rock bit and PDC drill bit structure, but is entered the characteristics of by both
Go and organically blended, and PDC drill bit, as neck eye portion, rock bit is as reaming hole part, so as to give full play to both skills
Art advantage；Neck eye PDC drill bit size is small, and under the high speed conditions of high the pressure of the drill, efficiency of breaking rock is higher, and is not likely to produce stick-slip and shakes
Dynamic, reaming hole gear wheel is different from conventional rock bit reaming hole device, and conventional rock bit uses knot of the bit leg including outer gear wheel
Structure, and the reaming hole gear wheel of reaming while drilling device then employs reverse geometry design, i.e., outside, and bit leg is exactly drill bit sheet to gear wheel
Body, this structure on the basis of gear wheel broken rock advantage is given full play to, can reduce the overall dimensions of cone structure, improve safety
Reliability, and be more convenient for processing and assembling；Gear wheel nozzle is installed on the drill body of reaming while drilling drill bit, and with each expansion
Eye tooth wheel corresponds, and injection direction is to tilt upward, and so caused drilling fluid jet can not only directly impact reaming hole tooth
The contact surface of wheel and rock, cleaning cooling reaming hole gear wheel simultaneously washes away landwaste, and can also accelerate the upward velocity of landwaste, avoids
The repetition of landwaste crushes.
Reaming while drilling drill bit structure is simple, and efficiency of construction is high, and physical dimension is short and small, therefore to the deflecting of DHA
Rate influence is smaller, can meet the reaming hole technological requirement of all kinds complex structural well.Site test results show, expand using with brill
Eye drill bit can averagely improve reaming hole drilling efficiency 68.5%-89.6%, and drilling quality meets design standard, realizes low energy
Consumption, efficient drilling well purpose, powerful technique support is provided for the Efficient Development of Deep Oil And Gas Exploration resource.
Brief description of the drawings
Fig. 1 is reaming while drilling drill bit structure schematic diagram of the present utility model.
Fig. 2 is reaming while drilling drill bit Section A-A structural representation of the present utility model.
In figure：1- drill bodies, 2- centre bores, 3- wiper blocks, 4- reaming holes gear wheel, 5- gear wheels nozzle, 6- pilot bits（I.e.
Lead eye PDC drill bit）, 7- neck eye nozzle.
Embodiment
It is described in detail the utility model below in conjunction with the accompanying drawings.
1 and accompanying drawing 2 referring to the drawings, reaming while drilling drill bit are mainly sprayed by drill body 1, wiper block 3, reaming hole gear wheel 4, gear wheel
Mouth 5, neck eye PDC drill bit 6, neck eye nozzle 7 form.The middle part machining center hole 2 of drill body 1, the external process righting of drill body 1
Block 4, reaming hole gear wheel 5 is arranged on drill body 1, and below wiper block 4, gear wheel nozzle 5 is arranged on drill body 1,
Being connected with centre bore 3, neck eye PDC drill bit 6 is arranged on the lower end of drill body 1, and neck eye nozzle 7 is installed in neck eye PDC drill bit 6,
And connected with centre bore 2.
As preferred：
The wiper block 3 is 3-5 blocks, and the uniform periphery of drill body 1, and friction-proof piece is inlayed in the outer surface of wiper block 3.
The reaming hole gear wheel 4 is 3-5, and is distributed on the periphery of drill body 1, and each reaming hole gear wheel 4 is corresponding at least one
Gear wheel nozzle 5.
The rotation axis of the reaming hole gear wheel 4 and the axis of drill body 1 are in 25-75 ° of angle.
Claims (4)
1. reaming while drilling drill bit, including drill body（1）With the pilot bit with drill body integrally connected（6）, neck eye nozzle
（7）, drill body（1）Axial machining center hole（2）, lead eye nozzle（7）Installed in pilot bit（6）It is interior, and and centre bore（2）
Connection, it is characterized in that：In drill body（1）Outside is additionally provided with wiper block（3）With reaming hole gear wheel（4）, gear wheel nozzle（5）；It is described
Reaming hole gear wheel（4）Including gear wheel and bit leg, its bit leg is exactly a part for drill body, reaming hole gear wheel（4）Positioned at wiper block（3）
And pilot bit（6）Between；The gear wheel nozzle（5）Installed in reaming hole gear wheel（4）The drill body of bottom（1）On, with center
Hole（2）Connection, and it is upward to reaming hole gear wheel（4）Working face.
2. reaming while drilling drill bit according to claim 1, it is characterized in that：The wiper block（3）For 3-5 blocks, and uniformly bore
Head body（1）Periphery, wiper block（3）Inlay friction-proof piece in outer surface.
3. reaming while drilling drill bit according to claim 1 or 2, it is characterized in that：The reaming hole gear wheel（4）For 3-5, and
Cloth is in drill body（1）Periphery, each reaming hole gear wheel（4）Corresponding at least one gear wheel nozzle（5）.
4. reaming while drilling drill bit according to claim 3, it is characterized in that：The reaming hole gear wheel（4）Axis and drill bit sheet
Body（1）Axis is in 25-75 ° of angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720685645.2U CN207048680U (en) | 2017-06-14 | 2017-06-14 | Reaming while drilling drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720685645.2U CN207048680U (en) | 2017-06-14 | 2017-06-14 | Reaming while drilling drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207048680U true CN207048680U (en) | 2018-02-27 |
Family
ID=61492677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720685645.2U Active CN207048680U (en) | 2017-06-14 | 2017-06-14 | Reaming while drilling drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207048680U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115522875A (en) * | 2022-11-04 | 2022-12-27 | 西南石油大学 | Contrarotating turbine drilling tool |
| CN116624100A (en) * | 2023-07-17 | 2023-08-22 | 山东石油化工学院 | Single-bending reaming while drilling device |
-
2017
- 2017-06-14 CN CN201720685645.2U patent/CN207048680U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115522875A (en) * | 2022-11-04 | 2022-12-27 | 西南石油大学 | Contrarotating turbine drilling tool |
| CN116624100A (en) * | 2023-07-17 | 2023-08-22 | 山东石油化工学院 | Single-bending reaming while drilling device |
| CN116624100B (en) * | 2023-07-17 | 2023-09-29 | 山东石油化工学院 | Single-bending reaming while drilling device |
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