CN105317377B - Center differential pressure type drill bit - Google Patents
Center differential pressure type drill bit Download PDFInfo
- Publication number
- CN105317377B CN105317377B CN201510790611.5A CN201510790611A CN105317377B CN 105317377 B CN105317377 B CN 105317377B CN 201510790611 A CN201510790611 A CN 201510790611A CN 105317377 B CN105317377 B CN 105317377B
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- drill bit
- bit
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- bizet
- joint
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- 238000005553 drilling Methods 0.000 claims abstract description 50
- 230000005540 biological transmission Effects 0.000 claims abstract description 34
- 230000001105 regulatory effect Effects 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 25
- 238000007789 sealing Methods 0.000 claims description 11
- 210000002445 nipple Anatomy 0.000 claims description 7
- 230000000295 complement effect Effects 0.000 claims description 4
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 3
- 241001484259 Lacuna Species 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 239000011435 rock Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 4
- 239000011229 interlayer Substances 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 6
- 230000035515 penetration Effects 0.000 description 4
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005315 distribution function Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention belongs to petroleum works field, in particular it relates to a kind of center differential pressure type drill bit.Center differential pressure type drill bit includes re-drill bit, pressure regulating spring, shunting power transmission assembly, pilot bit；Pilot bit links into an integrated entity with shunting power transmission assembly, is installed in the axial torsion pass hole of re-drill bit, pilot bit protrudes from re-drill bit bizet；Pressure regulating spring is between shunting power transmission assembly top and re-drill bit joint lower end；Re-drill bit can set one-level or multistage.The principle of the invention and simple in construction, it is applied widely, can be applied to various stratum, its using effect in many interlayer stratum more preferably；It can be used together with pulsing jet generating means, further improve bit speed；In drilling process, operation construction is identical with conventional drilling, does not have particular/special requirement to ground installation, well drilling pipe column, bite type, is conducive to the popularization of drill bit and uses.
Description
Technical field
The invention belongs to petroleum works field, in particular it relates to a kind of center differential pressure type drill bit.
Background technology
Situ of drilling well practice have shown that, in advance discharge downhole formation stress can effectively improve the efficiency of breaking rock of drill bit, and then
Improve bit speed.It is used to discharge shaft bottom stress in advance therefore, domestic and foreign scholars propose two methods, one kind is with hydraulic energy
The method of release reservoir stress based on amount, with pulse cavitating jet speed-raising technology, super-high pressure pulse jet speed-raising technology, mill
It is representative to expect jet speed-raising technology etc.；Another is to change bottom-hole stress field so as to discharge reservoir stress by changing bottom hole pattern
Method, with reaming while drilling technology, two-stage PDC bit drilling technology etc. for representative.Needed with hydraulic energy release reservoir stress
Specific purpose tool is connected above drill bit, this not only changes bottom hole assemblies composition, and consumes drilling well to a certain extent
Liquid hydraulic energy, and various well type are not widely deployed for, limit its application scenario；Change shaft bottom using wellbore shape is changed
The method of stress field only needs to can reach release reservoir stress raising brill by optimization design drill-shape or BHA
The effect of well speed, its development prospect is wide.However, existing reaming while drilling BHA and two-stage PDC bit do not possess the pressure of the drill
Automatic distribution function and drilling speed automatic regulation function, fail to carry speed-increasing effect to optimal.Therefore, needing one kind badly can be
Possess the pressure of the drill self-adjusted block in uniform stratum and drilling speed is automatically adjusted in many interlayer stratum drill bit with meet Different Strata,
The need for different well type well drilling speed.
The content of the invention
To overcome the drawbacks described above that prior art is present, the present invention provides a kind of center differential pressure type drill bit, utilizes drill bit
Contained spring elastic force realizes the automatically and reasonably distribution of the pressure of the drill between pilot bit and re-drill bit, utilizes pilot bit and re-drill bit
Between achievable relative axial movement realize automatically adjusting for drilling speed between two drill bits, pilot bit and re-drill bit are bored automatically
Pressure distribution adjust to it is optimal, rate of penetration controlled to most rationally, and then reach the purpose for improving rate of penetration.
To achieve the above object, the present invention uses following proposal：
Center differential pressure type drill bit, including：Re-drill bit, pressure regulating spring, shunting power transmission assembly, pilot bit；Lead eye
Drill bit links into an integrated entity with shunting power transmission assembly, is installed in the axial torsion pass hole of re-drill bit, pilot bit protrudes from reaming hole
Drill bit；Pressure regulating spring is between shunting power transmission assembly top and re-drill bit joint lower end；Re-drill bit can be with
One-level or multistage are set.
Relative to prior art, the present invention has the advantages that：
1st, principle and simple in construction, it is not necessary to install other instruments, the implementation of other drilling well processes is not influenceed；
2nd, it is applied widely, available for the various well type such as straight well, directional well, drill collar is can be directly connected to, can also be with
The instruments such as power drilling tool, pulsing jet generating means are used cooperatively；
3rd, various stratum be can be applied to, its using effect in many interlayer stratum more preferably；
4th, it can be used together with pulsing jet generating means, be provided and periodically shaken for pilot bit using pulsing jet
Power, so as to realize pilot bit rotary percussion drilling effect, further improve bit speed；
5th, in drilling process, operation construction is identical with conventional drilling, to ground installation, well drilling pipe column, bite type
There is no particular/special requirement, be conducive to the popularization of drill bit and use.
Brief description of the drawings
Tu1Shi centers differential pressure type drill bit (twin-stage) structural representation；
Fig. 2 is A-A profiles in Fig. 1；
Tu3Shi centers differential pressure type drill bit (three-level) structural representation；
In figure：1st, re-drill bit, 2, pressure regulating spring, 3, shunting power transmission assembly, 4, pilot bit, 101, re-drill bit
Joint, 102, re-drill bit bizet, 103, re-drill bit nozzle, 301, shunting disk, 302, rectifying cavity, 401, pilot bit connects
Head, 402, pilot bit bizet, 11, one-level pilot bit, 111, one level shunt power transmission assembly, 112, first class pressure regulation bullet
Spring, 113, one-level re-drill bit, 211, two level shunt power transmission assemblies, 212, secondary pressure regulation spring.213rd, two grades of reamers
Head.
Embodiment
As shown in figure 1, center differential pressure type drill bit, including：Re-drill bit 1, pressure regulating spring 2, shunting power transmission assembly 3,
Pilot bit 4；Pilot bit 4 is threadedly coupled integrally with shunting power transmission assembly 3, is installed on the axial torsion pass hole of re-drill bit 1
Interior, pilot bit 4 protrudes from the bizet of re-drill bit 1；Pressure regulating spring 2 is located at the top of shunting power transmission assembly 3 and re-drill bit
Between the lower end of joint 101；Re-drill bit can set one-level or multistage, and Fig. 1 sets one-level re-drill bit, and Fig. 3 sets two grades
Re-drill bit；Center differential pressure type drill bit using its internal pressure adjust elastic force realize the pressure of the drill between pilot bit and re-drill bit from
Dynamic reasonable distribution, using can be realized between pilot bit and re-drill bit relative axial movement realize drilling speed between two drill bits from
Dynamic regulation, by pilot bit and the distribution of re-drill bit the pressure of the drill be automatically adjusted to it is optimal, rate of penetration is controlled to most rationally, and then
Reach the purpose for improving rate of penetration.
Re-drill bit 1, including：Re-drill bit joint 101, re-drill bit bizet 102, re-drill bit joint 101, reamer
Crown 102 fixes as one.
The outer upper of re-drill bit joint 101 be drilling tool connection screw thread, middle part be the joint body with upper clasp forceps mouthful, under
Portion is affixed joint face, and drilling tool connection screw thread is connected for drill bit with top drilling tool, and joint body is to bore when being used to dismount drill bit
Head applies moment of torsion, and affixed joint face is re-drill bit joint 101, the affixed offer interface of re-drill bit bizet 102；Re-drill bit connects
First 101 inner side is followed successively by from top to bottom：Drilling fluid runner, spring pressure-bearing step surface, spring outer protection cylinder；Drilling fluid runner
For providing fluid space for drilling fluid, spring pressure-bearing step surface is used to provide stress support, spring outer protection cylinder for spring
It is spacing for spring activity space.
The outer tip end of re-drill bit bizet 102 is the affixed joint face of re-drill bit, and bottom is preced with for drill bit；Re-drill bit is affixed
The affixed joint face shape of joint face and re-drill bit joint 101 is complementary, realizes re-drill bit bizet 102 and re-drill bit joint
101 it is affixed；The crown shape of drill bit is identical with normal drill bit according to stratum changing features；In the axially inner side of re-drill bit bizet 102
Hold as circular hole, lower end is torsion pass hole；Outside the spring of the upper end of re-drill bit bizet 102 circle bore dia and re-drill bit joint 101
Portion's protection cylinder diameter is identical；The bottom of 102 lower end torsion pass hole insertion re-drill bit bizet of re-drill bit bizet 102, torsion pass hole is transversal
Face is shaped as many square structures or of bonding structure；The inner top side circular hole of re-drill bit bizet 102 is to the bottom of re-drill bit bizet 102
Bit wing wing root portion is provided with nozzle flow channel, and nozzle flow channel bottom is provided with re-drill bit nozzle 103.
Shunting power transmission assembly 3 is installed in the circular port hole inside re-drill bit bizet 102, can be along re-drill bit axis side
To relative to re-drill bit slightly activity, but do not produced relative rotation in circumference up and down；The outer upper of shunting power transmission assembly 3 is to help
Positive sealing surface, middle part is shunting load pipe nipple confined planes, and bottom is torsion pass bearing torque face；Righting sealing surface and re-drill bit bizet
The circular hole of 102 inner top sides coordinates, it is ensured that re-drill bit bizet 102 is not produced with shunting power transmission assembly 3 and radially rocked；Righting is close
It is provided with front cover in seal groove, seal groove and sealing is installed；Shunt load pipe nipple confined planes diameter and be less than righting sealing surface, but greatly
The step limitation shunting constituted between torsion pass bearing torque face circumscribed circle diameter, shunting load pipe nipple confined planes and torsion pass bearing torque face is passed
Displacement, and prevent shunting power transmission assembly 3 from deviating from reamer pileum to axial between power assembly 3 and re-drill bit bizet 102
Portion 102；Torsion pass bearing torque face coordinates with the lower end torsion pass interporal lacuna of shunting power transmission assembly 3, for the moment of torsion of re-drill bit bizet 102 to be passed
Pass shunting power transmission assembly 3；It is shunting disk 301 to shunt the inside upper part of power transmission assembly 3, and middle part is pilot bit drilling fluid runner,
Bottom is pilot bit drilling tool junction button；The step that shunting disk 301 is constituted with righting sealing surface and shunting load pipe nipple confined planes
Re-drill bit drilling fluid flowing hole is provided between face, for part drilling fluid to be delivered into drilling fluid rectifying cavity 302；Pilot bit
Drilling fluid runner is used to provide runner to be diverted to the drilling fluid of pilot bit, and the pilot bit drilling tool of shunting power transmission assembly 3 connects
Connecing button is used to connect pilot bit assembly.
Spring 2 is located in re-drill bit body, installs the top of shunting power transmission assembly 3 and the inside lower end of re-drill bit joint 101
Step surface between.
Pilot bit 4, including：Pilot bit joint 401, pilot bit bizet 402, pilot bit joint 401, neck eye are bored
Crown 402 fixes as one；
The top in the outside of pilot bit joint 401 be pilot bit connection screw thread, middle part be pilot bit joint body, under
Portion is the affixed joint face of pilot bit, and pilot bit drilling tool connection screw thread is used to connect pilot bit bizet 402 and shunting power transmission
Assembly 3, pilot bit joint body applies moment of torsion, the affixed joint face of pilot bit when being used to dismount pilot bit for pilot bit
For pilot bit joint 401, the affixed offer space of pilot bit bizet 402；There is drilling fluid stream the inner side of pilot bit joint 401
Road, the runner is used to provide fluid space for drilling fluid.
The outer upper end of pilot bit bizet 402 is the affixed joint face of pilot bit, and lower end is neck eye drill bit hat；Eye is led to bore
The affixed joint face shape of affixed joint face and pilot bit joint 401 is complementary, for realizing pilot bit bizet 402 and neck
Eye bit adapter 401 it is affixed；The crown shape of drill bit is identical with normal drill bit according to stratum changing features；Pilot bit bizet 402
Inner top side is drilling fluid flowing hole, the inner top side drilling fluid flowing hole of pilot bit bizet 402 and pilot bit wing root
Between be provided with bit nozzle runner, pilot bit nozzle flow channel bottom is provided with pilot bit nozzle.
As shown in figure 3, the pilot bit of Fig. 1 centers differential pressure type drill bit (twin-stage) is replaced by into minor diameter center differential pressure type brill
Head (twin-stage) constitutes tertiary centre differential pressure type drill bit；According to aforesaid way, by the pilot bit of tertiary centre differential pressure type drill bit more
The center differential pressure type drill bit (twin-stage) of smaller diameter is changed to, quaternary center differential pressure type drill bit can be formed.Can be with structure according to this method
Produce multilevel center differential pressure type drill bit.
Claims (7)
1. a kind of center differential pressure type drill bit, including：Re-drill bit, pressure regulating spring, shunting power transmission assembly, pilot bit；Its
It is characterised by：Pilot bit is linked into an integrated entity with shunting power transmission assembly, is installed in the axial torsion pass hole of re-drill bit, and neck eye is bored
Head protrudes from re-drill bit bizet；Pressure regulating spring is between shunting power transmission assembly top and re-drill bit joint lower end；
Re-drill bit can set one-level or multistage；
Re-drill bit includes re-drill bit joint and re-drill bit bizet, and affixed re-drill bit joint, re-drill bit bizet are one
Body；
Re-drill bit joint outer upper is that drilling tool connection screw thread, middle part are solid for the joint body with upper clasp forceps mouthful, bottom
Junction in succession；The inner side of re-drill bit joint is followed successively by from top to bottom：Drilling fluid runner, spring pressure-bearing step surface, outside spring
Protect cylinder；
Re-drill bit bizet outer tip end is the affixed joint face of re-drill bit, and bottom is preced with for drill bit；The affixed joint face of re-drill bit
It is complementary with the affixed joint face shape of re-drill bit joint, realize the affixed of re-drill bit bizet and re-drill bit joint；Drill bit
Crown shape is according to stratum changing features, and re-drill bit bizet axially inner side upper end is circular hole, and lower end is torsion pass hole；Reamer pileum
Portion upper end circle bore dia is identical with the spring outer protection cylinder diameter of re-drill bit joint；Re-drill bit bizet lower end torsion pass hole
Insertion re-drill bit bizet bottom, torsion pass hole shape of cross section is many square structures or of bonding structure；On the inside of re-drill bit bizet
Upper end circular hole to re-drill bit bizet bottom bit wing wing root portion is provided with nozzle flow channel, and nozzle flow channel bottom is provided with re-drill bit
Nozzle.
2. differential pressure type drill bit in center according to claim 1, it is characterised in that：Shunting power transmission assembly is installed on re-drill bit
, can be along re-drill bit axis direction relative to re-drill bit slightly activity, but in circumference up and down in circular port hole inside bizet
Do not produce relative rotation；It is righting sealing surface to shunt power transmission assembly outer upper, and middle part is shunting load pipe nipple confined planes, bottom
For torsion pass bearing torque face；Righting sealing surface and the circular hole of re-drill bit bizet inner top side coordinate, it is ensured that re-drill bit bizet is with dividing
Spread power assembly do not produce radially rock；It is provided with righting sealing surface in seal groove, seal groove and sealing is installed；Shunt load short
Save confined planes diameter and be less than righting sealing surface, but more than torsion pass bearing torque face circumscribed circle diameter, shunting load pipe nipple confined planes are with passing
Turn round displacement, and preventing to axial between the step limitation shunting power transmission assembly constituted between bearing torque face and re-drill bit bizet
Shunt power transmission assembly abjection re-drill bit bizet；Torsion pass bearing torque face coordinates with shunting power transmission assembly lower end torsion pass interporal lacuna, will expand
Eye drill bit moment of torsion passes to shunting power transmission assembly；It is shunting disk to shunt power transmission assembly inside upper part, and middle part is pilot bit
Drilling fluid runner, bottom is pilot bit drilling tool junction button；Shunting disk and righting sealing surface and shunting load pipe nipple confined planes structure
Into step surface between be provided with re-drill bit drilling fluid flowing hole, for part drilling fluid to be delivered into drilling fluid rectifying cavity；Neck
Eye drill bit drilling fluid runner is used to provide runner to be diverted to the drilling fluid of pilot bit, and the pilot bit of shunting power transmission assembly is bored
Tool junction button is used to connect pilot bit.
3. differential pressure type drill bit in center according to claim 2, it is characterised in that：Pressure regulating spring is located at re-drill bit body
It is interior, install between shunting power transmission assembly top and the step surface of re-drill bit joint inside lower end.
4. differential pressure type drill bit in center according to claim 3, it is characterised in that：Pilot bit, including：Pilot bit connects
Head, pilot bit bizet, pilot bit joint, pilot bit bizet fix as one.
5. differential pressure type drill bit in center according to claim 4, it is characterised in that：Top on the outside of pilot bit joint is neck
Eye drill bit connection screw thread, middle part are that pilot bit joint body, bottom are the affixed joint face of pilot bit, pilot bit joint
There is drilling fluid runner inner side.
6. differential pressure type drill bit in center according to claim 5, it is characterised in that：Pilot bit bizet outer upper end is neck eye
The affixed joint face of drill bit, lower end is neck eye drill bit hat；The affixed connection of the affixed joint face of pilot bit and pilot bit joint
Face shape is complementary, realizes the affixed of pilot bit bizet and pilot bit joint；The crown shape of drill bit is according to stratum changing features, neck
Eye drill bit inner top side is drilling fluid flowing hole, pilot bit bizet inner top side drilling fluid flowing hole and pilot bit knife
Bit nozzle runner is provided between wing root portion, pilot bit nozzle flow channel bottom is provided with pilot bit nozzle.
7. differential pressure type drill bit in center according to claim 6, it is characterised in that：The neck eye of double center differential pressure type drill bits is bored
Head is replaced by minor diameter center differential pressure type drill bit and constitutes tertiary centre differential pressure type drill bit；It is according to aforesaid way, tertiary centre is poor
The pilot bit of pressure type drill bit is replaced by the twin-stage center differential pressure type drill bit of smaller diameter, can form quaternary center differential pressure type brill
Head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510790611.5A CN105317377B (en) | 2015-11-17 | 2015-11-17 | Center differential pressure type drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510790611.5A CN105317377B (en) | 2015-11-17 | 2015-11-17 | Center differential pressure type drill bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105317377A CN105317377A (en) | 2016-02-10 |
| CN105317377B true CN105317377B (en) | 2017-08-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510790611.5A Active CN105317377B (en) | 2015-11-17 | 2015-11-17 | Center differential pressure type drill bit |
Country Status (1)
| Country | Link |
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| CN (1) | CN105317377B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703701A (en) * | 2017-01-20 | 2017-05-24 | 中国石油大学(华东) | Pulse impact producing mechanism and center differential pressure drill comprising same |
| CN107386960B (en) * | 2017-08-04 | 2023-07-04 | 四川深远石油钻井工具股份有限公司 | Drilling speed-increasing device with composite drill bit |
| CN107386961B (en) * | 2017-08-04 | 2023-08-11 | 四川深远石油钻井工具股份有限公司 | Drilling speed increasing device |
| CN108278078B (en) * | 2018-02-05 | 2020-01-24 | 中国石油大学(北京) | Ultrasonic high-frequency impact drilling device |
| CN112020594A (en) * | 2018-03-26 | 2020-12-01 | 诺瓦泰克Ip有限责任公司 | Wellbore cross-section manipulation |
| CN109594927A (en) * | 2018-12-21 | 2019-04-09 | 巴州大朴石油技术服务有限公司 | A kind of elastic drill bit for oil exploitation |
| CN111608589B (en) * | 2020-05-19 | 2022-09-09 | 中国石油化工股份有限公司 | Bottom hole stress induction unloading drill bit and method for improving drilling speed thereof |
| CN115324485B (en) * | 2022-10-17 | 2022-12-23 | 成都迪普金刚石钻头有限责任公司 | Self-adaptive PDC composite drill bit |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AR034780A1 (en) * | 2001-07-16 | 2004-03-17 | Shell Int Research | MOUNTING OF ROTATING DRILL AND METHOD FOR DIRECTIONAL DRILLING |
| CN201560757U (en) * | 2009-12-21 | 2010-08-25 | 北京中联博韬科技咨询有限公司 | Mud pulse generator |
| CN102704843A (en) * | 2012-05-09 | 2012-10-03 | 中国石油天然气股份有限公司 | Efficient bit of pilot hole |
| CN104234632B (en) * | 2014-08-21 | 2016-04-20 | 张陈泓 | A kind of bottom expanding drill |
| CN204716136U (en) * | 2015-05-13 | 2015-10-21 | 固安飞腾机械制造有限公司 | A kind of Anchor rod base-enlarging drill bit |
-
2015
- 2015-11-17 CN CN201510790611.5A patent/CN105317377B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105317377A (en) | 2016-02-10 |
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